SlideShare a Scribd company logo
Medical Laser Application 20 (2005) 103–109
Lasers in dermatology – State of the art
Roland KaufmannÃ
Zentrum der Dermatologie und Venerologie, Klinikum der J.W. Goethe-Universita¨t, Theodor-Stern-Kai 7, 69590 Frankfurt am
Main, Germany
Received 11 March 2005; accepted 14 March 2005
Abstract
Owing to the increasing diversity of technological developments and to the resulting versatility of treatment options,
the range of laser applications in dermatology has been expanding rapidly. A large variety of benign skin disorders
originating from diverse epithelial, adnexal, vascular or other tissue elements, but also many disease-related or
acquired cutaneous lesions as well as signs of aged skin or disorders of hair growth can be amenable to laser light
treatment. In fact, modern laser technology does improve the majority of such cases either by means of appropriate
wavelengths targeting vascular or pigmented lesions or by laser ablation widely utilized to superficially remove
circumscribed disorders and moreover for skin resurfacing purposes mainly in photodamaged skin areas. As a
consequence, we meanwhile face a broad number of potential indications in Dermatology. Nevertheless, also non-
ablative skin rejuvenation techniques using intense pulsed light sources (IPL technology) or radiofrequency (RF)
devices for a non-optical energy delivery as well as the introduction of photodynamic therapy have noticeably
influenced today’s concepts especially with regard to skin rejuvenation purposes.
r 2005 Elsevier GmbH. All rights reserved.
Keywords: Skin disorder; Laser therapy; Review
Introduction
Advances in laser technology as well as an increasing
demand for the removal of unsightly or disturbing skin
lesions appearing throughout life have both contributed
to a rapidly expanding field of laser use in Dermatology.
Consequently, we today are facing not only a growing
range in versatile laser systems, but also an extremely
broad spectrum of potential candidate lesions [1]. As
compared to other treatment options, the use of lasers
aims at a selective removal of diseased target structures
with maximum sparing of uninvolved adjacent skin.
This selectivity can at least to some degree be achieved
by choosing the appropriate laser light wavelength and
pulse duration responsible for the amount of heat
diffusion. Continuous-wave (cw) laser beams are used
for coagulation or vaporization of skin lesions and
largely depend on the penetration depth of heat energy
into the skin. On the other hand, selective photother-
molysis combines short pulses (avoiding relevant tissue
heating) of laser light with wavelengths selectively
absorbed by target chromophores (better focusing the
delivered energy to target structures) thus contributing
to a more specific treatment in both pigmented (melanin
as a target chromophore) and vascular lesions (hemo-
globin in blood vessels as chromophore), but moreover
also in ablative procedures (tissue water as target). For
superficial epidermal, vascular and pigmented lesions,
several laser systems can be used alternatively with
ARTICLE IN PRESS
www.elsevier.de/mla
1615-1615/$ - see front matter r 2005 Elsevier GmbH. All rights reserved.
doi:10.1016/j.mla.2005.03.005
ÃTel.: +49 69 6301 5311; fax: +49 69 6301 5117.
E-mail address: Kaufmann@em.uni-frankfurt.de (R. Kaufmann).
preference depending on the depth, volume and type of
diseased or disturbing tissue structures. Lasers typically
employed in destructing vascular or pigmented skin
lesions are summarized in Table 1. Apart from lasers
specifically targeting vascular or pigmented disorders
and those achieving a circumscribed removal of super-
ficial lesions, some systems are used in an attempt to
either ablate or vaporize larger surface areas (e.g.
resurfacing of sun-damaged skin and wrinkles) or to
thermally influence the dermal tissue while sparing the
epidermal surface by subablative energy delivery (sub-
surfacing of textural changes and fine wrinkles in
elastotic skin changes). Nevertheless, also non-ablative
skin rejuvenation techniques by means of intense pulsed
light sources (IPL technology) or employing radio-
frequency (RF) devices for a non-optical energy delivery
as well as the introduction of photodynamic photo-
rejuvenation have noticeably influenced the concepts of
using light sources, especially with regard to laser skin
resurfacing of photo-aged skin. A survey is given in
Table 2.
Indications for lasers in dermatology
Unpleasant skin lesions suitable for laser therapy can
be present since birth (e.g. portwine stains) or might
appear later in life as acquired malformations, benign
tumors or otherwise disturbing lesions related to specific
diseases (e.g. keratotic lesions in Darier’s disease). They
can originate from a vast array of epithelial, adnexal,
vascular or other tissue elements. Many of those
occurring later in life are associated with the perception
of an aged skin (e.g. senile angioma, senile lentigines). In
addition, lasers can be indicated in disorders of hair
growth, of pigmentation or even in inflammatory skin
diseases, such as chronic plaque psoriasis. The majority
of these conditions do at least improve by the use of
appropriate laser systems available today. In some
special cases, laser therapy is best combined with other
techniques. Table 3 summarizes examples from diverse
fields of indications.
Pigmentary disorders
The advantage of laser use in Dermatology is
certainly most obvious in some of the various pigmented
disorders that cannot be removed by any other
treatment alternative [2]. One example is the transcuta-
neous destruction of exogenously incorporated pigment
in either decorative or traumatic tattoos [3]. Especially
deeper non-professional black pigments are usually
successfully lightened by diverse pigment-specific laser
types (Q-switched 1064 nm Nd:YAG-, 694 nm Ruby-, or
755 nm Alexandrite Lasers) within only few treatment
sessions [4]. Ruby- and Alexandrite-laser wavelengths
ARTICLE IN PRESS
Table 1. Lasers frequently used in vascular and pigmented skin lesions
Therapeutic purpose Laser type Mode Wavelength (nm)
1. Vessels
Superficial photocoagulation Argon cw 488, 514
KTP Pulsed/Q-switch 532
Diode Long pulse 910, 980
Dyed Long pulse 595, 600
Deep photocoagulation Nd:YAG cw
Long pulse 1064
Selective photothermolysis Dye Pulsed 585
2. Pigments
Selective photothermolysis Ruby Q-switch 694
Alexandrite Q-switch 755
Nd:YAG Q-switch 1064
Table 2. Lasers and light sources used for skin resurfacing
Mode Light sources
1. Ablative laser-resurfacing
Pure ablation Er:YAG laser
Vaporization Pulsed CO2 laser
Combined systems CO2/Er:YAG combination
Er:YAG laser with ablative and
thermal mode
2. Non-ablative techniques
Subsurfacing e.g. Longpulse 1320 nm Nd:YAG
laser
Er:YAG laser in thermal mode
Photorejuvenation IPL systems
Photodynamic
rejuvenation
Photosensitizer plus IPL or PDT
lamp
R. Kaufmann / Medical Laser Application 20 (2005) 103–109104
are also appropriate for green pigments, whereas
frequency-doubled Q-switched Nd:YAG laser irradia-
tion at 532 nm typically can improve red pigments [5].
From recent in vitro analysis it has been speculated, if
potentially hazardous compounds generated by pulsed
laser light cleavage from widely used tattoo dyes might
be toxic or even carcinogenic and thus bear yet
unreported risks [6].
Other frequent indications for Q-switched laser
irradiation are flat pigmented seborrhoic keratosis
clinically presented as senile lentigines, also solar
lentigines. However, these more macular type of age
spots typically also located on the dorsum of the hands
or in the area of the de´ collete´ can also be very
superficially dermabraded or ablated (mainly removal
of epithelium in a sense of a laser peeling) using an
Er:YAG laser [7]. Especially in these very delicate
locations laser ablation has to be performed with great
caution, since the photo-aged skin is not only atrophic
but in non-facial areas also might lack adnexal
structures required for re-epithelization. Among the
more critical fields of indications are melanocytic nevi.
Among these, without any doubt, patients presenting
with Nevus of Ota or acquired Ota-like dermal
melanocytosis usually experience considerable improve-
ments following Q-switched laser treatment series, also
in combination with prior ablative procedures or
bleaching agents [8]. Even incomplete clearing can be
considered a major help, since any improvement will be
suited to relieve much of the psychological trauma
usually associated with all disfiguring types of nevi. Also
it is proven that benign junctional melanocytic nevi
lasers can lighten the lesions, whereas they tend to recur
in deeper compound or dermal types of melanocytic
nevi. In larger congenital nevi, lasers have been used to
either reduce the pigment or to remove associated hair
growth [9,10]. Ablative lasers are routinely applied as
an alternative to mechanical dermabrasion of larger
ARTICLE IN PRESS
Table 3. Laser treatment in dermatology
Indications Photocoagulation Selective photothermolysis Ablation UV phototherapy
Pigments Vessels
Pigmentary disorders
e.g. Tattoos + +
Nevus of Ota +
Hypopigmented lesions (e.g. vitiligo) +
Vascular lesions
e.g. Teleangiectasias + +
Lip angiomas +
Senile angiomas +
Superficial varicosities + +
Varicosis of saphenous vein +a
Epithelial and adnexal lesions
e.g. Epidermal nevi +
Seborrhoic keratosis +
Viral warts +
Sebaceous gland hyperplasias +
Rhinophymab
+
Dermal lesions
e.g. Syringoma +
Xanthelasma +
Scar revision + + +
Lesions in photo-aged skin
e.g. Actinic keratosis +
Solar lentigines + +
Superficial wrinkles +
Others
e.g. Laser epilation + +
Plaque psoriasis + +
Examples of indications and involved tissue interactions.
a
As fiber guided endoluminal procedure.
b
In combination with other techniques (shaving, elektrocauterization).
R. Kaufmann / Medical Laser Application 20 (2005) 103–109 105
congenital nevi early in life, especially in critical areas
(e.g. periorbital or anogential skin) [11]. However,
deeper parts or excessive hair follicles cannot be
eliminated by this approach. Thus far, no reports of
malignant transformation after such treatments have
appeared, though pseudomelanoma might result from
any incomplete nevus removal and early melanoma
lesions can easily be erroneously mistaken for benign
spots. Therefore, in all suspicious melanocytic lesions
fulfilling criteria of atypia or initial malignancy,
histology is mandatory prior to any destructive type of
treatment.
Apart from other diverse dyschromias presented
clinically as hyperpigmented lesions, lasers might also
be considered as a therapeutic tool in hypopigmented
conditions. In particular, 308 nm UV-excimer laser light
has been used successfully for repigmentation of vitiligo
[12], but also in hypopigmented scars or striae alba [13].
On the other hand, vitiligo patients treated with the
intention of complete depigmentation can be relieved of
recalcitrant pigment by the use of Q-switched lasers [14].
Vascular lesions
Vascular skin disorders have been among the first
lesions treated with lasers and today a large number of
systems are available for this ailment, providing either
superficial or deep photocoagulation as well as selective
photothermolysis of smaller delicate vessels located
within the skin surface [15]. Table 1 summarizes lasers
frequently used in vascular skin lesions. A superficial
photocoagulation is achievable in the visible spectral
range (Argon, KTP, Krypton, Diode), while light of
long pulsed or continuous wave lasers in the near
infrared (e.g. 1064 nm Nd:YAG) penetrate to a deeper
level leading to larger coagulation volumes. Pulsed laser
light of appropriate wavelengths matching the absorp-
tion peaks of oxyhemoglobin (585, 590 nm) will instead
destroy fine capillary vessels leading to initial hemor-
rhage with visible immediate bluish discoloration.
Flashlamp-pumped dye lasers are mainly indicated in
children with superficial and light-red portwine stains
[16]. In childhood hemangiomas instead, only improve-
ment of superficial components can be induced, while
deeper parts require larger volumes of tissue coagula-
tion, as with cw Nd:YAG-laser light irradiation. For
many indications in daily practice however, superficial
photocoagulation with continuous or quasi-continuous
long pulse systems will usually be adequate (e.g. facial
teleangiectasias, senile angiomas) [17]. In teleangiectatic
disorders of the lower extremities, instead, the use of
laser light sources bears a higher risk of unwarranted
side effects (atrophy, depigmentation, scarring) and the
results have not been as successful as they are in facial
skin. In superficial varicosities enhanced results might be
obtained by modified pulse durations and use of more
penetrating, longer wavelengths (e.g. long pulse
Nd:YAG lasers at 1064 nm). In varicose lesser or greater
saphenous veins, endovenous laser treatment is an
increasingly used and newly developed method to induce
thrombotic occlusion via endoluminal steam bubble
formation with subsequent heat injury of the vessel wall
[18]. Apart from diode lasers (e.g. 940 nm at pulses of
15 J) 1064 nm Nd:YAG laser light is delivered with an
optical fibre in a continuous wave mode and irradiations
of 10 s duration at 10–15 W are currently used for this
photocoagulative purpose [19,20].
Epithelial, adnexal and cutaneous lesions
Among epithelial disorders, certain variants of
epidermal nevi are well suited for laser ablative
procedures, especially in areas critically in need of
dermabrasion. Other examples of lasers being used
complementarily or as an alternative to mechanical
dermabrasion are genetically determined disorders, such
as superficial lesions in Hailey–Hailey’s or Darier’s
disease [21]. Among the more localized lesions, sebor-
rhoic keratosis (including lentigo senile as superficial
variant) are easily ablated, particularly in more delicate
areas. Among the dermal and adnexal disorders,
syringomas and xanthelasmata are candidates for a
stepwise tissue sparing laser ablation [11]. In particular,
the Erbium-YAG laser can achieve a precise and fine
ablation in this subtle indication. Moreover, in solitary
or multiple sebaceous gland hyperplasia as well as in the
condition of rhinophyma, tissue ablation or vaporiza-
tion has been used. Rhinophyma is usually associated
with rosacea, where a combined conservative and
surgical approach is required. Laser applications include
the photocoagulation of teleangiectatic components in
this disorder, while vaporization has been widely
employed as an alternative to surgical or electrocaustical
shaving techniques in rhinophyma. Laser vaporization
can avoid bleeding otherwise associated with derma-
shaving or dermabrasion. As an alternative to CO2-laser
vaporization, Erbium lasers can be used in less
angiomatous tumor formations or with systems allowing
a combined hemostasis function (dual mode Er:YAG
lasers).
Lasers in photo-aged skin
In photo-aged skin, lasers are mainly used for
resurfacing purposes, to improve superficial wrinkles
related to cutaneous elastosis, to treat cysts and
comedones in Morbus Favre Racouchot or when
removing multiple solar lentigines or actinic keratoses
in a given aesthetic unit [17]. Skin resurfacing of sun-
damaged areas can be either performed by a thermal
ARTICLE IN PRESS
R. Kaufmann / Medical Laser Application 20 (2005) 103–109106
vaporization (pulsed CO2 laser) [22], or by using a less
heat damaging pulsed skin ablation (Er:YAG laser) even
in a single pass fashion [23]. All laser resurfacing
procedures generate injured areas analogous to erosions
or deeper excoriations with a subsequent risk of
bacterial, viral or even fungal infections, especially in
burned surfaces after thermal vaporization. Re-epithe-
lization following initial edema, exsudation and crusting
can result in longstanding erythema and post-inflam-
matory pigmentary changes (early transient hyperpig-
mentation, late lasting depigmentation) [24].
As an alternative to laser skin ablation, non-ablative
laser systems are also used in an effort to generate heat
production within the dermal connective tissue without
necessarily removing the overlying epidermal skin sur-
face. This ‘‘subsurfacing’’ or non-ablative skin remodel-
ing can be achieved by delivering light of appropriate
wavelength capable of penetrating deeply enough
through the surface while cooling the epidermis during
the light–tissue interaction in order to prevent superficial
heat injury. It attempts to stimulate dermal inflamma-
tion and subsequent collagen formation [25]. The
induction of a controlled heat injury within the dermal
connective tissue while leaving the epidermal layer intact
also circumvents a surface wounding and consecutive
‘‘down-time’’ during the phase of tissue repair. Such a
transepidermal energy delivery has been achieved by
long-pulsed subablative laser irradiation of diverse
wavelengths within the visible and infrared spectral
range paralleled by a combined surface cooling. How-
ever, apart from some tightening initiated due to an
initial edema, the results with regards to any wrinkle
improvement are less remarkable than with tissue
ablative work unless some degree of dermal fibrosis
can be induced. As an alternative to laser systems,
polychromatic flashlamp sources (IPL systems, e.g. at
690–755 nm wavelength) are also used. The removal of
age-related vascular changes or pigmentary disorders
along with a lightening of a freckled aged skin surface by
such laser or IPL-light sources is generally referred to as
‘‘type I subsurfacing’’ while the less successful skin
tightening along with some improvement in fine wrink-
ling or textural changes is termed ‘‘type II subsurfacing’’
[26] Moreover, photodynamic treatment of larger areas
of sun-damaged facial skin can achieve some degree of
tissue tightening, which is named photodynamic facial
rejuvenation [27]. Newer alternatives combine either
IPL sources with RF energy or use RF devices (selective
electrothermolysis) for the same purpose [28].
Disorders of hair growth
Among the most rapid expanding fields of laser and
light-based technological developments within recent
years are certainly hair removal procedures [29].
Photoepilation is especially helpful in fair skin types
with dark hair leading to reduction of hair growth, as
well as lightening and thinning of remaining hairs in the
majority of individuals after repeated treatment sessions
with perifollicular pigmentary changes being the most
common adverse side effects [30]. Laser systems
commonly used include the ruby- (694 nm), alexandrite-
(755 nm), diode- (810) and Nd:YAG laser (1064 nm)
[31]. However, many physicians prefer the use of non-
coherent IPL technology for this purpose [26].
Inflammatory skin diseases
Among some other inflammatory skin diseases
amenable to light therapy, in particular, psoriasis shows
a high prevalence and is a common therapeutic
challenge. It has been treated by use of ablative lasers,
but also by laser phototherapy in order to improve
chronic plaque-type lesions. Laser ablation can achieve
control of recalcitrant solitary plaques [32], whereas
308 nm UV-excimer laser light has been shown to
yield responses as expected from UVB-phototherapy
of respective circumscribed lesions and provides a
well tolerated means to clear plaques in mild to
moderate disease [33,34]. Most recently, also a non-
laser 308 nm monochromatic excimer light delivery
system has been evaluated in skin diseases for the same
purpose [35].
Scar revision
Various types of hypertrophic or depressed scar
formations, including acne or chicken pox scars, can
benefit from laser resurfacing or repetitive superficial
laser peeling. Especially in acne patients, a more
controlled and homogeneous removal of the skin surface
is possible as compared to mechanical dermabrasion.
Less pronounced cases might also be improved by using
laser light in a non-ablative technique (e.g. Nd:YAG-
laser subsurfacing) [36] Repetitive treatment sessions
and combining the procedure with other techniques,
such as punch elevations or fine excisions and subci-
sions, will add to a stepwise improvement over longer
periods. Also in keloids, laser ablation is best combined
with additional techniques (e.g. compression, steroid
injections, cryotherapy). In surgical scars laser ablation
is able to flatten uneven edges after flaps or grafts.
Moreover, in hypertrophic and teleangiectatic scars as
well as in keloids flashlamp, pumped dye lasers can be
indicated. Finally, hyperpigmented zones might benefit
from appropriate Q-switched lasers systems, and in
depigmented scars 308 nm excimer laser light has been
used successfully [13].
ARTICLE IN PRESS
R. Kaufmann / Medical Laser Application 20 (2005) 103–109 107
Laser-assisted procedures
In several procedures and indications, lasers are used
as adjunct devices combined with other suitable
techniques. Examples are laser-assisted grafting of
vitiligo lesions [37], laser-assisted hair grafting [38] or
laser-assisted removal of osteoma cutis [39] or sea urchin
spines [40].
Zusammenfassung
Laser in der Dermatologie – Aktueller Stand
Vielfa¨ ltige technische Entwicklungen und daraus
resultierende Therapieoptionen haben gerade in der
Dermatologie zu einer raschen und weiten Verbreitung
von Laseranwendungen gefu¨ hrt. Neben den zahlreichen
benignen Neu- und Fehlbildungen des Epithels, der
Adnexe, der Gefa¨ ße und anderer Gewebekomponenten
stellen auch viele krankheitsassoziierte oder erworbene
Hautla¨ sionen, ebenso Vera¨ nderungen der Altershaut
oder Sto¨ rungen des Haarwuchses Indikationen fu¨ r eine
Lasertherapie dar. So kann in den meisten dieser Fa¨ lle
mithilfe moderner Lasersysteme eine Besserung erzielt
werden, sei es durch den Einsatz geeigneter Wellenla¨ n-
gen bei vaskula¨ ren oder pigmentierten Hautvera¨ nde-
rungen oder durch die weit verbreitete Laserablation
zum Abtragen umschriebener La¨ sionen oder zum soge-
nannten Resurfacing, insbesondere von lichtgescha¨ digten
Hautarealen. Daher sind wir heute in der Dermatologie
mit einem besonders breiten Indikatonsspektrum fu¨ r
potentielle Laseranwendungen konfrontiert. Allerdings
haben sowohl die Einfu¨ hrung hochenergetischer Blitz-
lampen (IPL-Technologie) wie auch nichtoptischer
Radiofrequenz-Gera¨ te oder der photodynamischen
Therapie die heutigen Konzepte der Therapie insbeson-
dere auf dem Gebiet der Behandlung altersassoziierter
Hautvera¨ nderungen im Hinblick auf den Lasereinsatz
relativiert.
r 2005 Elsevier GmbH. All rights reserved.
Schlu¨sselwo¨rter: Hauterkrankungen; Lasertherapie; U¨ bersicht
References
[1] Tanzi EL, Lupton JR, Alster TS. Lasers in dermatology:
four decades of progress. J Am Acad Dermatol
2003;49:1–31.
[2] Dover JS, Kane KS. Lasers for the treatment of
cutaneous pigmented disorders. In: Arndt KA, Dover
JS, Olbricht S, editors. Lasers in cutaneous and aesthetic
surgery. Philadelphia: Lippincott Raven; 1997. p. 165–87.
[3] Graudenz K, Greve B, Raulin C. Diffundierte Schmutz-
und Schmuckta¨ towierungen. Entfernung durch gu¨ te-
geschaltete Laser. Hautarzt 2003;54:756–9.
[4] Kuperman-Beade M, Levin VJ, Ashinoff R. Laser
removal of tattoos. Am J Clin Dermatol 2001;2:21–5.
[5] Adatto M. Laser tattoo removal: benfits and cavets. Med
Laser Appl 2004;19:175–85.
[6] Vasold R, Naarmann N, Ulrich H, Fischer D, Ko¨ nig B,
Landthaler M, Ba¨ umler W. Tattoo pigments are cleaved
by laser light – the chemical analysis in vitro provide
evidence for hazardous compounds. Photochem Photo-
biol 2004;80:185–90.
[7] Jimenez G, Spencer JM. Erbium:YAG laser resurfacing
of the hands, arms, and neck. Dermatol Surg 1999;25:
831–4.
[8] Momosawa A, Yoshimura K, Uchida G, Sato K, Aiba E,
Matsumoto D, Yamaoka H, Mihara S, Tsukamoto K,
Harii K, Aoyama T, Iga T. Combined therapy using Q-
switched ruby laser and bleaching treatment with
tretinoin and hydroquinone for acquired dermal melano-
cytosis. Dermatol Surg 2003;29:1001–7.
[9] Noordzij MJ, van den Broecke DG, Alting MC, Kon M.
Ruby laser treatment of congenital melanocytic nevi: a
review of the literature and report of our own experience.
Plast Reconstr Surg 2004;114:660–7.
[10] Westerhof W, Gamei M. Treatment of acquired junc-
tional melanocytic naevi by Q-switched and normal mode
ruby laser. Br J Dermatol 2003;148:80–5.
[11] Kaufmann R, Beier C. Laser skin ablation: an update on
aesthetic and medical indications. Med Laser Appl
2004;19:212–22.
[12] Hadi SM, Spencer JM, Lebwohl M. The use of the 308-
nm excimer laser for the treatment of vitiligo. Dermatol
Surg 2004;30:983–6.
[13] Aleciades-Armenakas MR, Bernstein LJ, Friedmann
PM, Geronemus RG. The safety and efficacy of the
308 nm excimer laser for pigment correction of hypopig-
mented scars and striae alba. Arch Dermatol 2004;140:
955–60.
[14] Rao J, Fitzpatrick RE. Use of the Q-switched 755 nm
alexandrite laser to treat recalcitrant pigment after
depigmentation therapy for vitiligo. Dermatol Surg 2004;
30:1043–5.
[15] Landthaler M, Ulrich H, Hohenleutner S, Wimmershoff
M, Hohenleutner U. Role of laser therapy in dermatology
– clinical aspects. Dermatology 2004;208:129–34.
[16] Wimmershoff MB, Wenig M, Hohenleutner U, Land-
thaler M. Die Behandlung von Feuermalen mit dem
blitzlampengepumpten gepulsten Farbstofflaser. Ergeb-
nisse aus 5 Jahren klinischer Erfahrung. Hautarzt
2001;52:1001–15.
[17] Kaufmann R. Role of Erbium:YAG Laser in the
treatment of the aged skin. Clin Exp Dermatol 2001;26:
631–6.
[18] Proebstle TM, Lehr HA, Kargl A, Espinola-Klein C,
Rother W, Bethge S, Knop J. Endovenous treatment of
the greater saphenous vein with a 940-nm diode laser:
thrombotic occlusion after endoluminal thermal damage
by laser-generated steam bubbles. J Vasc Surg 2002;35:
729–36.
[19] Chang CJ, Chua JJ. Endovenous laser photocoagulation
(EVLP) for varicose veins. Lasers Surg Med 2002;31:
257–62.
ARTICLE IN PRESS
R. Kaufmann / Medical Laser Application 20 (2005) 103–109108
[20] Proebstle TM, Gul D, Kargl A, Knop J. Endovenous
laser treatment of the lesser saphenous vein with a 940 nm
diode laser: early results. Dermatol Surg 2003;29:357–61.
[21] Beier C, Kaufmann R. Erbium:YAG laser therapy of
Darier’s and Hailey–Hailey’s disease. Arch Dermatol
1999;135:423–7.
[22] Fitzpatrick RE, Goldman MP, Satur NM, Tope W.
Pulsed carbon dioxide laser resurfacing of photoaged
facial skin. Arch Dermatol 1996;132:395–402.
[23] Avram DK, Goldman MP. The safety and effectiveness
of single-pass erbium:YAG-laser in the treatment of mild
to moderate photodamage. Dermatol Surg 2004;30:
1073–6.
[24] Nanni CA, Alster T. Complications of carbon dioxide
laser resurfacing. An evaluation of 500 patients. Dermatol
Surg 1998;24:315–20.
[25] Sadick NS. Update on non-ablative light therapy for
rejuvenation: a review. Lasers Surg Med 2003;32:120–8.
[26] Bjerring P. Photorejuvenation – an overview. Med Laser
Appl 2004;19:186–95.
[27] Ruiz-Rodriguez R, Sanz-Sanchez T, Cordoba S. Photo-
dynamic photorejuvenation. Dermatol Surg 2002;28:
742–4.
[28] Ruiz-Espara J. Noninvasive lower eyelid blepharoplasty:
a new technique using nonablative radiofrequency on
periorbital skin. Dermatol Surg 2004;30:125–9.
[29] Sadick NS. Laser hair removal. Facial Plast Surg Clin
North Am 2004;12:191–200.
[30] Lepselter J, Elman M. Biological and clinical aspects
in laser hair removal. J Dermatol Treat 2004;15:
72–83.
[31] Bouzari N, Tabatabai H, Abbasi Z, Firooz A, Dowlati Y.
Laser hair removal: comparison of long-pulsed Nd:YAG,
long-pulsed alexandrite, and long-pulsed diode lasers.
Dermatol Surg 2004;30:498–502.
[32] Boehncke WH, Ochsendorf F, Wolter M, Kaufmann R.
Ablative techniques in psoriasis vulgaris resistant
to conventional therapies. Dermatol Surg 1999;25:
618–21.
[33] Grema H, Raulin C. Der Excimer-Laser in der Derma-
tologie und a¨ sthetischen Medizin. Hautarzt 2004;55:
48–57.
[34] Rodewald EJ, Housman TS, Mellen BG, Feldman SR.
Follow-up survey of 308 nm laser treatment of psoriasis.
Laser Surg Med 2002;31:202–6.
[35] Aubin F, Vigan M, Puztenat E, Blanc D, Drobacheff C,
Deprez P, Humbert P, Laurent R. Evaluation of a novel
308 nm monochromatic excimer light delivery system in
dermatology: a pilot study in different chronic localized
dermatoses. Br J Dermatol 2005;152:99–103.
[36] Friedman PM, Jih MH, Skover GR, Payonk GS, Kimyai-
Asadi A, Geronemus RG. Treatment of atrophic facial
acne scars with the 1064 nm Q-switched Nd:YAG laser: a
six-month follow-up study. Arch Dermatol 2004;140:
1337–41.
[37] Kaufmann R, Greiner D, Kippenberger S, Bernd A.
Grafting of in vitro cultured melanocytes onto laser-
ablated lesions in vitiligo. Acta Dermatol Venereol
1998;78:136–8.
[38] Podda M, Spieth K, Kaufmann R. Er:YAG laser-assisted
hair transplantation in cicatricial alopecia. Dermatol Surg
2000;26:1010–4.
[39] Ochsendorf FR, Kaufmann R. Erbium:YAG laser-assisted
treatment of miliary osteoma cutis. Br J Dermatol 1998;
138:371–2.
[40] Boer A, Ochsendorf FR, Beier C, Kaufmann R. Effective
removal of sea-urchin spines by erbium:YAG laser
ablation. Br J Dermatol 2001;145:169–70.
ARTICLE IN PRESS
LISA laser products OHG
Max - Planck - Str. 1
D - 37191 Katlenburg
fon: +49 (0)5556 - 9938 - 0
web: www.lisalaser.com
Germany
LISAwww.lisalaser.com
RevoLix high power 2 micron cw laser
RevoLix Jr. low power 2 micron cw laser
Sphinx Holmium-Laser
DioLix Diode-Laser
Competence in surgical
2 micron laser technology
Visit us at DGLM Congress, Munich 15.- 16.06.05
Booth ICM.117
______________________ Advertisement _____________________
R. Kaufmann / Medical Laser Application 20 (2005) 103–109 109

More Related Content

What's hot

BASICS OF LASER AND IT'S USE IN DERMATOLOGY
BASICS OF LASER AND IT'S USE IN DERMATOLOGYBASICS OF LASER AND IT'S USE IN DERMATOLOGY
BASICS OF LASER AND IT'S USE IN DERMATOLOGY
Rohit Singh
 
Pulsed dye laser in dermatology
Pulsed dye laser in dermatologyPulsed dye laser in dermatology
Pulsed dye laser in dermatology
Islam Noaman
 
Fractional co2 laser operation instruction
Fractional co2 laser  operation instructionFractional co2 laser  operation instruction
Fractional co2 laser operation instruction
Mindy Ma
 
Fractional radiofrequency microneedling in esthetic medicine
Fractional radiofrequency microneedling in esthetic medicineFractional radiofrequency microneedling in esthetic medicine
Fractional radiofrequency microneedling in esthetic medicine
peternugraha
 
SCIENTIFIC RATIONALE BEHIND THREAD LIFT PROCEDURE
SCIENTIFIC RATIONALE BEHIND THREAD LIFT PROCEDURESCIENTIFIC RATIONALE BEHIND THREAD LIFT PROCEDURE
SCIENTIFIC RATIONALE BEHIND THREAD LIFT PROCEDURE
molanparker
 
Microdermabrasion
MicrodermabrasionMicrodermabrasion
Microdermabrasion
Dr. Rajat Sachdeva
 
Micro needling
Micro needlingMicro needling
Micro needling
Dr. Rajat Sachdeva
 
Radio Frequency Skin Tightening
Radio Frequency Skin Tightening   Radio Frequency Skin Tightening
Radio Frequency Skin Tightening
Pretty Face
 
Acne scar presentation
Acne scar presentationAcne scar presentation
Acne scar presentation
RINKU PANWAR
 
Dermatoscope and its application in dermatology
Dermatoscope and its application in dermatologyDermatoscope and its application in dermatology
Dermatoscope and its application in dermatology
Swathy Lekshmi J L
 
Laser skin toning
Laser skin toningLaser skin toning
Laser skin toning
Dr. Rajat Sachdeva
 
Application of laser in dermatology
Application of laser in dermatologyApplication of laser in dermatology
Application of laser in dermatology
vivianjoshua
 
BOTOX - Botulinum toxin in aesthesis
BOTOX - Botulinum toxin in aesthesisBOTOX - Botulinum toxin in aesthesis
BOTOX - Botulinum toxin in aesthesis
Satish Kumar
 
Dermal fillers
Dermal fillersDermal fillers
Dermal fillers
Dr. Rajat Sachdeva
 
Introduction to laser dermatology 1
Introduction to laser dermatology 1Introduction to laser dermatology 1
Introduction to laser dermatology 1
Islam Noaman
 
Laser hair removal
Laser hair removalLaser hair removal
Laser hair removal
Laserhaireduction Delhi
 
Fractional laser kasbia 2013 chica
Fractional laser kasbia 2013 chicaFractional laser kasbia 2013 chica
Fractional laser kasbia 2013 chica
Gursevak Kasbia
 
Microdermabrasion (mda)
Microdermabrasion (mda)Microdermabrasion (mda)
Laser Hair removal. Is it Permanent?
Laser Hair removal. Is it Permanent?Laser Hair removal. Is it Permanent?
Laser Hair removal. Is it Permanent?
Osama Moawad
 
Consult- laser hair removal
Consult- laser hair removalConsult- laser hair removal
Consult- laser hair removal
American Laser Med Spa
 

What's hot (20)

BASICS OF LASER AND IT'S USE IN DERMATOLOGY
BASICS OF LASER AND IT'S USE IN DERMATOLOGYBASICS OF LASER AND IT'S USE IN DERMATOLOGY
BASICS OF LASER AND IT'S USE IN DERMATOLOGY
 
Pulsed dye laser in dermatology
Pulsed dye laser in dermatologyPulsed dye laser in dermatology
Pulsed dye laser in dermatology
 
Fractional co2 laser operation instruction
Fractional co2 laser  operation instructionFractional co2 laser  operation instruction
Fractional co2 laser operation instruction
 
Fractional radiofrequency microneedling in esthetic medicine
Fractional radiofrequency microneedling in esthetic medicineFractional radiofrequency microneedling in esthetic medicine
Fractional radiofrequency microneedling in esthetic medicine
 
SCIENTIFIC RATIONALE BEHIND THREAD LIFT PROCEDURE
SCIENTIFIC RATIONALE BEHIND THREAD LIFT PROCEDURESCIENTIFIC RATIONALE BEHIND THREAD LIFT PROCEDURE
SCIENTIFIC RATIONALE BEHIND THREAD LIFT PROCEDURE
 
Microdermabrasion
MicrodermabrasionMicrodermabrasion
Microdermabrasion
 
Micro needling
Micro needlingMicro needling
Micro needling
 
Radio Frequency Skin Tightening
Radio Frequency Skin Tightening   Radio Frequency Skin Tightening
Radio Frequency Skin Tightening
 
Acne scar presentation
Acne scar presentationAcne scar presentation
Acne scar presentation
 
Dermatoscope and its application in dermatology
Dermatoscope and its application in dermatologyDermatoscope and its application in dermatology
Dermatoscope and its application in dermatology
 
Laser skin toning
Laser skin toningLaser skin toning
Laser skin toning
 
Application of laser in dermatology
Application of laser in dermatologyApplication of laser in dermatology
Application of laser in dermatology
 
BOTOX - Botulinum toxin in aesthesis
BOTOX - Botulinum toxin in aesthesisBOTOX - Botulinum toxin in aesthesis
BOTOX - Botulinum toxin in aesthesis
 
Dermal fillers
Dermal fillersDermal fillers
Dermal fillers
 
Introduction to laser dermatology 1
Introduction to laser dermatology 1Introduction to laser dermatology 1
Introduction to laser dermatology 1
 
Laser hair removal
Laser hair removalLaser hair removal
Laser hair removal
 
Fractional laser kasbia 2013 chica
Fractional laser kasbia 2013 chicaFractional laser kasbia 2013 chica
Fractional laser kasbia 2013 chica
 
Microdermabrasion (mda)
Microdermabrasion (mda)Microdermabrasion (mda)
Microdermabrasion (mda)
 
Laser Hair removal. Is it Permanent?
Laser Hair removal. Is it Permanent?Laser Hair removal. Is it Permanent?
Laser Hair removal. Is it Permanent?
 
Consult- laser hair removal
Consult- laser hair removalConsult- laser hair removal
Consult- laser hair removal
 

Viewers also liked

Introduction to laser dermatology 2
Introduction to laser dermatology 2Introduction to laser dermatology 2
Introduction to laser dermatology 2
Islam Noaman
 
Laser and its medical applications
Laser and its medical applicationsLaser and its medical applications
Laser and its medical applications
Thamirabharani Engineering college,Tirunelveli
 
Silabus pkn awal asisten
Silabus pkn awal asistenSilabus pkn awal asisten
Silabus pkn awal asisten
Raden Arum Setia Priadi
 
The Application of Laser Measurement to Reduce Whole of Life Ownership Costs ...
The Application of Laser Measurement to Reduce Whole of Life Ownership Costs ...The Application of Laser Measurement to Reduce Whole of Life Ownership Costs ...
The Application of Laser Measurement to Reduce Whole of Life Ownership Costs ...
Michael Hartas
 
Laser Application - Allied Protector Plan
Laser Application - Allied Protector PlanLaser Application - Allied Protector Plan
Laser Application - Allied Protector Plan
evaj171
 
Using Botox for Periorbital Rejuvenation
Using Botox for Periorbital Rejuvenation Using Botox for Periorbital Rejuvenation
Using Botox for Periorbital Rejuvenation
Dr. Patrick J. Treacy
 
Introduction to laser dermatology 3
Introduction to laser dermatology 3Introduction to laser dermatology 3
Introduction to laser dermatology 3
Islam Noaman
 
Topical corticosteroids
Topical corticosteroids Topical corticosteroids
Topical corticosteroids
nop108
 
topical therapy in dermatology
topical therapy in dermatologytopical therapy in dermatology
topical therapy in dermatology
Mikhin Thomas
 
Surgical Anatomy Of The Nose
Surgical Anatomy Of The NoseSurgical Anatomy Of The Nose
Surgical Anatomy Of The Nose
Chih-Yen Wei
 
Rhinoplasty (Nose Anatomy)
Rhinoplasty  (Nose Anatomy) Rhinoplasty  (Nose Anatomy)
Rhinoplasty (Nose Anatomy)
yellow_sunfire102
 
Laser Therapy Power Point
Laser Therapy Power PointLaser Therapy Power Point
Laser Therapy Power Point
bmsdevelepment
 
Ppt scar
Ppt scarPpt scar
Diagnosis and treatment of gummy smile
Diagnosis and treatment of gummy smileDiagnosis and treatment of gummy smile
Diagnosis and treatment of gummy smile
Marwan Mouakeh
 
Laser ppt
Laser pptLaser ppt
Laser & Its Application
Laser & Its ApplicationLaser & Its Application
Laser & Its Application
Tuhin_Das
 
Rhinoplasty raju ppt full
Rhinoplasty raju ppt fullRhinoplasty raju ppt full
Rhinoplasty raju ppt full
Ram Raju
 

Viewers also liked (17)

Introduction to laser dermatology 2
Introduction to laser dermatology 2Introduction to laser dermatology 2
Introduction to laser dermatology 2
 
Laser and its medical applications
Laser and its medical applicationsLaser and its medical applications
Laser and its medical applications
 
Silabus pkn awal asisten
Silabus pkn awal asistenSilabus pkn awal asisten
Silabus pkn awal asisten
 
The Application of Laser Measurement to Reduce Whole of Life Ownership Costs ...
The Application of Laser Measurement to Reduce Whole of Life Ownership Costs ...The Application of Laser Measurement to Reduce Whole of Life Ownership Costs ...
The Application of Laser Measurement to Reduce Whole of Life Ownership Costs ...
 
Laser Application - Allied Protector Plan
Laser Application - Allied Protector PlanLaser Application - Allied Protector Plan
Laser Application - Allied Protector Plan
 
Using Botox for Periorbital Rejuvenation
Using Botox for Periorbital Rejuvenation Using Botox for Periorbital Rejuvenation
Using Botox for Periorbital Rejuvenation
 
Introduction to laser dermatology 3
Introduction to laser dermatology 3Introduction to laser dermatology 3
Introduction to laser dermatology 3
 
Topical corticosteroids
Topical corticosteroids Topical corticosteroids
Topical corticosteroids
 
topical therapy in dermatology
topical therapy in dermatologytopical therapy in dermatology
topical therapy in dermatology
 
Surgical Anatomy Of The Nose
Surgical Anatomy Of The NoseSurgical Anatomy Of The Nose
Surgical Anatomy Of The Nose
 
Rhinoplasty (Nose Anatomy)
Rhinoplasty  (Nose Anatomy) Rhinoplasty  (Nose Anatomy)
Rhinoplasty (Nose Anatomy)
 
Laser Therapy Power Point
Laser Therapy Power PointLaser Therapy Power Point
Laser Therapy Power Point
 
Ppt scar
Ppt scarPpt scar
Ppt scar
 
Diagnosis and treatment of gummy smile
Diagnosis and treatment of gummy smileDiagnosis and treatment of gummy smile
Diagnosis and treatment of gummy smile
 
Laser ppt
Laser pptLaser ppt
Laser ppt
 
Laser & Its Application
Laser & Its ApplicationLaser & Its Application
Laser & Its Application
 
Rhinoplasty raju ppt full
Rhinoplasty raju ppt fullRhinoplasty raju ppt full
Rhinoplasty raju ppt full
 

Similar to Laser in dermatology

Ocular phototherapy . Ocular phototherapy
Ocular phototherapy . Ocular phototherapyOcular phototherapy . Ocular phototherapy
Ocular phototherapy . Ocular phototherapy
MSGAZAAR1
 
Lasers in dentistry. sameera
Lasers in dentistry. sameeraLasers in dentistry. sameera
Lasers in dentistry. sameera
Dr VenuSameera Panthagada
 
Wellman center geral sobre LLLT hamblin
Wellman center geral sobre LLLT  hamblinWellman center geral sobre LLLT  hamblin
Wellman center geral sobre LLLT hamblin
capellux
 
Alma 2016 Clinical Publication - Legato II Treats Scars
Alma 2016 Clinical Publication - Legato II Treats Scars Alma 2016 Clinical Publication - Legato II Treats Scars
Alma 2016 Clinical Publication - Legato II Treats Scars
Hamutal Gozlan
 
Basics of Lasers
Basics of Lasers Basics of Lasers
Basics of Lasers
Lokender Yadav
 
Laser dermatology
Laser dermatologyLaser dermatology
Laser dermatology
Springer
 
Lasers innovation of the era naglaa shawki el kilani
  Lasers innovation of the era  naglaa shawki el kilani  Lasers innovation of the era  naglaa shawki el kilani
Lasers innovation of the era naglaa shawki el kilani
Faculty of Dental Medicine, Al Azhar University
 
Surgical lasers 081118
Surgical lasers 081118Surgical lasers 081118
Surgical lasers 081118
Dr. Ravi Bhushan
 
Medical applications of laser 4
Medical applications of laser 4 Medical applications of laser 4
Medical applications of laser 4
Bio Physics
 
Low Level Laser Therapy Class 3b vs Class 4
Low Level Laser Therapy Class 3b vs Class 4Low Level Laser Therapy Class 3b vs Class 4
Low Level Laser Therapy Class 3b vs Class 4
Theralase Technologies Inc.
 
Medical applications of laser 3
Medical applications of laser 3 Medical applications of laser 3
Medical applications of laser 3
Bio Physics
 
fractional co2 resurfacing has it replacer ablative resurfacin techniques?
fractional co2 resurfacing has it replacer ablative resurfacin techniques?fractional co2 resurfacing has it replacer ablative resurfacin techniques?
fractional co2 resurfacing has it replacer ablative resurfacin techniques?
investigacionclinica
 
Laser, cryosurgery and its application in veterinary practice
Laser, cryosurgery and its application in veterinary practiceLaser, cryosurgery and its application in veterinary practice
Laser, cryosurgery and its application in veterinary practice
GangaYadav4
 
radiation therapy for oral cancer0000.pptx
radiation therapy for oral cancer0000.pptxradiation therapy for oral cancer0000.pptx
radiation therapy for oral cancer0000.pptx
ssuserc1c61a
 
OBECURE Executive Summary
OBECURE Executive SummaryOBECURE Executive Summary
OBECURE Executive Summary
JM Yoon
 
New Frontiers in Laser Surgery
New Frontiers in Laser SurgeryNew Frontiers in Laser Surgery
New Frontiers in Laser Surgery
Clara Jacobson
 
Karimi understanding lasers[1]
Karimi understanding lasers[1]Karimi understanding lasers[1]
Karimi understanding lasers[1]
manouchehr Karimi
 
Breakthroughs_of_using_Photodynamic_Therapy_and_Gold_Nanoparticles_in_Cancer_...
Breakthroughs_of_using_Photodynamic_Therapy_and_Gold_Nanoparticles_in_Cancer_...Breakthroughs_of_using_Photodynamic_Therapy_and_Gold_Nanoparticles_in_Cancer_...
Breakthroughs_of_using_Photodynamic_Therapy_and_Gold_Nanoparticles_in_Cancer_...
National Institute of laser, Cairo university
 
Lasers In Urology
Lasers In UrologyLasers In Urology
Lasers In Urology
Ahmad Kharrouby
 
LASERS IN ORAL MEDICINE.docx
LASERS IN ORAL MEDICINE.docxLASERS IN ORAL MEDICINE.docx
LASERS IN ORAL MEDICINE.docx
43NehaUpreti
 

Similar to Laser in dermatology (20)

Ocular phototherapy . Ocular phototherapy
Ocular phototherapy . Ocular phototherapyOcular phototherapy . Ocular phototherapy
Ocular phototherapy . Ocular phototherapy
 
Lasers in dentistry. sameera
Lasers in dentistry. sameeraLasers in dentistry. sameera
Lasers in dentistry. sameera
 
Wellman center geral sobre LLLT hamblin
Wellman center geral sobre LLLT  hamblinWellman center geral sobre LLLT  hamblin
Wellman center geral sobre LLLT hamblin
 
Alma 2016 Clinical Publication - Legato II Treats Scars
Alma 2016 Clinical Publication - Legato II Treats Scars Alma 2016 Clinical Publication - Legato II Treats Scars
Alma 2016 Clinical Publication - Legato II Treats Scars
 
Basics of Lasers
Basics of Lasers Basics of Lasers
Basics of Lasers
 
Laser dermatology
Laser dermatologyLaser dermatology
Laser dermatology
 
Lasers innovation of the era naglaa shawki el kilani
  Lasers innovation of the era  naglaa shawki el kilani  Lasers innovation of the era  naglaa shawki el kilani
Lasers innovation of the era naglaa shawki el kilani
 
Surgical lasers 081118
Surgical lasers 081118Surgical lasers 081118
Surgical lasers 081118
 
Medical applications of laser 4
Medical applications of laser 4 Medical applications of laser 4
Medical applications of laser 4
 
Low Level Laser Therapy Class 3b vs Class 4
Low Level Laser Therapy Class 3b vs Class 4Low Level Laser Therapy Class 3b vs Class 4
Low Level Laser Therapy Class 3b vs Class 4
 
Medical applications of laser 3
Medical applications of laser 3 Medical applications of laser 3
Medical applications of laser 3
 
fractional co2 resurfacing has it replacer ablative resurfacin techniques?
fractional co2 resurfacing has it replacer ablative resurfacin techniques?fractional co2 resurfacing has it replacer ablative resurfacin techniques?
fractional co2 resurfacing has it replacer ablative resurfacin techniques?
 
Laser, cryosurgery and its application in veterinary practice
Laser, cryosurgery and its application in veterinary practiceLaser, cryosurgery and its application in veterinary practice
Laser, cryosurgery and its application in veterinary practice
 
radiation therapy for oral cancer0000.pptx
radiation therapy for oral cancer0000.pptxradiation therapy for oral cancer0000.pptx
radiation therapy for oral cancer0000.pptx
 
OBECURE Executive Summary
OBECURE Executive SummaryOBECURE Executive Summary
OBECURE Executive Summary
 
New Frontiers in Laser Surgery
New Frontiers in Laser SurgeryNew Frontiers in Laser Surgery
New Frontiers in Laser Surgery
 
Karimi understanding lasers[1]
Karimi understanding lasers[1]Karimi understanding lasers[1]
Karimi understanding lasers[1]
 
Breakthroughs_of_using_Photodynamic_Therapy_and_Gold_Nanoparticles_in_Cancer_...
Breakthroughs_of_using_Photodynamic_Therapy_and_Gold_Nanoparticles_in_Cancer_...Breakthroughs_of_using_Photodynamic_Therapy_and_Gold_Nanoparticles_in_Cancer_...
Breakthroughs_of_using_Photodynamic_Therapy_and_Gold_Nanoparticles_in_Cancer_...
 
Lasers In Urology
Lasers In UrologyLasers In Urology
Lasers In Urology
 
LASERS IN ORAL MEDICINE.docx
LASERS IN ORAL MEDICINE.docxLASERS IN ORAL MEDICINE.docx
LASERS IN ORAL MEDICINE.docx
 

Recently uploaded

CHEMOTHERAPY_RDP_CHAPTER 1_ANTI TB DRUGS.pdf
CHEMOTHERAPY_RDP_CHAPTER 1_ANTI TB DRUGS.pdfCHEMOTHERAPY_RDP_CHAPTER 1_ANTI TB DRUGS.pdf
CHEMOTHERAPY_RDP_CHAPTER 1_ANTI TB DRUGS.pdf
rishi2789
 
LOW BIRTH WEIGHT. PRETERM BABIES OR SMALL FOR DATES BABIES
LOW BIRTH WEIGHT. PRETERM BABIES OR SMALL FOR DATES BABIESLOW BIRTH WEIGHT. PRETERM BABIES OR SMALL FOR DATES BABIES
LOW BIRTH WEIGHT. PRETERM BABIES OR SMALL FOR DATES BABIES
ShraddhaTamshettiwar
 
Skin Diseases That Happen During Summer.
 Skin Diseases That Happen During Summer. Skin Diseases That Happen During Summer.
Skin Diseases That Happen During Summer.
Gokuldas Hospital
 
Post-Menstrual Smell- When to Suspect Vaginitis.pptx
Post-Menstrual Smell- When to Suspect Vaginitis.pptxPost-Menstrual Smell- When to Suspect Vaginitis.pptx
Post-Menstrual Smell- When to Suspect Vaginitis.pptx
FFragrant
 
Promoting Wellbeing - Applied Social Psychology - Psychology SuperNotes
Promoting Wellbeing - Applied Social Psychology - Psychology SuperNotesPromoting Wellbeing - Applied Social Psychology - Psychology SuperNotes
Promoting Wellbeing - Applied Social Psychology - Psychology SuperNotes
PsychoTech Services
 
pharmacology for dummies free pdf download.pdf
pharmacology for dummies free pdf download.pdfpharmacology for dummies free pdf download.pdf
pharmacology for dummies free pdf download.pdf
KerlynIgnacio
 
Pharmacology of 5-hydroxytryptamine and Antagonist
Pharmacology of 5-hydroxytryptamine and AntagonistPharmacology of 5-hydroxytryptamine and Antagonist
Pharmacology of 5-hydroxytryptamine and Antagonist
Dr. Nikhilkumar Sakle
 
CBL Seminar 2024_Preliminary Program.pdf
CBL Seminar 2024_Preliminary Program.pdfCBL Seminar 2024_Preliminary Program.pdf
CBL Seminar 2024_Preliminary Program.pdf
suvadeepdas911
 
CHEMOTHERAPY_RDP_CHAPTER 4_ANTI VIRAL DRUGS.pdf
CHEMOTHERAPY_RDP_CHAPTER 4_ANTI VIRAL DRUGS.pdfCHEMOTHERAPY_RDP_CHAPTER 4_ANTI VIRAL DRUGS.pdf
CHEMOTHERAPY_RDP_CHAPTER 4_ANTI VIRAL DRUGS.pdf
rishi2789
 
Alzheimer’s Disease Case Conference: Gearing Up for the Expanding Role of Neu...
Alzheimer’s Disease Case Conference: Gearing Up for the Expanding Role of Neu...Alzheimer’s Disease Case Conference: Gearing Up for the Expanding Role of Neu...
Alzheimer’s Disease Case Conference: Gearing Up for the Expanding Role of Neu...
PVI, PeerView Institute for Medical Education
 
CHEMOTHERAPY_RDP_CHAPTER 6_Anti Malarial Drugs.pdf
CHEMOTHERAPY_RDP_CHAPTER 6_Anti Malarial Drugs.pdfCHEMOTHERAPY_RDP_CHAPTER 6_Anti Malarial Drugs.pdf
CHEMOTHERAPY_RDP_CHAPTER 6_Anti Malarial Drugs.pdf
rishi2789
 
Histololgy of Female Reproductive System.pptx
Histololgy of Female Reproductive System.pptxHistololgy of Female Reproductive System.pptx
Histololgy of Female Reproductive System.pptx
AyeshaZaid1
 
Lecture 6 -- Memory 2015.pptlearning occurs when a stimulus (unconditioned st...
Lecture 6 -- Memory 2015.pptlearning occurs when a stimulus (unconditioned st...Lecture 6 -- Memory 2015.pptlearning occurs when a stimulus (unconditioned st...
Lecture 6 -- Memory 2015.pptlearning occurs when a stimulus (unconditioned st...
AyushGadhvi1
 
Top Travel Vaccinations in Manchester
Top Travel Vaccinations in ManchesterTop Travel Vaccinations in Manchester
Top Travel Vaccinations in Manchester
NX Healthcare
 
Pollen and Fungal allergy: aeroallergy.pdf
Pollen and Fungal allergy: aeroallergy.pdfPollen and Fungal allergy: aeroallergy.pdf
Pollen and Fungal allergy: aeroallergy.pdf
Chulalongkorn Allergy and Clinical Immunology Research Group
 
CHEMOTHERAPY_RDP_CHAPTER 2 _LEPROSY.pdf1
CHEMOTHERAPY_RDP_CHAPTER 2 _LEPROSY.pdf1CHEMOTHERAPY_RDP_CHAPTER 2 _LEPROSY.pdf1
CHEMOTHERAPY_RDP_CHAPTER 2 _LEPROSY.pdf1
rishi2789
 
DECLARATION OF HELSINKI - History and principles
DECLARATION OF HELSINKI - History and principlesDECLARATION OF HELSINKI - History and principles
DECLARATION OF HELSINKI - History and principles
anaghabharat01
 
Hemodialysis: Chapter 5, Dialyzers Overview - Dr.Gawad
Hemodialysis: Chapter 5, Dialyzers Overview - Dr.GawadHemodialysis: Chapter 5, Dialyzers Overview - Dr.Gawad
Hemodialysis: Chapter 5, Dialyzers Overview - Dr.Gawad
NephroTube - Dr.Gawad
 
What are the different types of Dental implants.
What are the different types of Dental implants.What are the different types of Dental implants.
What are the different types of Dental implants.
Gokuldas Hospital
 
NARCOTICS- POLICY AND PROCEDURES FOR ITS USE
NARCOTICS- POLICY AND PROCEDURES FOR ITS USENARCOTICS- POLICY AND PROCEDURES FOR ITS USE
NARCOTICS- POLICY AND PROCEDURES FOR ITS USE
Dr. Ahana Haroon
 

Recently uploaded (20)

CHEMOTHERAPY_RDP_CHAPTER 1_ANTI TB DRUGS.pdf
CHEMOTHERAPY_RDP_CHAPTER 1_ANTI TB DRUGS.pdfCHEMOTHERAPY_RDP_CHAPTER 1_ANTI TB DRUGS.pdf
CHEMOTHERAPY_RDP_CHAPTER 1_ANTI TB DRUGS.pdf
 
LOW BIRTH WEIGHT. PRETERM BABIES OR SMALL FOR DATES BABIES
LOW BIRTH WEIGHT. PRETERM BABIES OR SMALL FOR DATES BABIESLOW BIRTH WEIGHT. PRETERM BABIES OR SMALL FOR DATES BABIES
LOW BIRTH WEIGHT. PRETERM BABIES OR SMALL FOR DATES BABIES
 
Skin Diseases That Happen During Summer.
 Skin Diseases That Happen During Summer. Skin Diseases That Happen During Summer.
Skin Diseases That Happen During Summer.
 
Post-Menstrual Smell- When to Suspect Vaginitis.pptx
Post-Menstrual Smell- When to Suspect Vaginitis.pptxPost-Menstrual Smell- When to Suspect Vaginitis.pptx
Post-Menstrual Smell- When to Suspect Vaginitis.pptx
 
Promoting Wellbeing - Applied Social Psychology - Psychology SuperNotes
Promoting Wellbeing - Applied Social Psychology - Psychology SuperNotesPromoting Wellbeing - Applied Social Psychology - Psychology SuperNotes
Promoting Wellbeing - Applied Social Psychology - Psychology SuperNotes
 
pharmacology for dummies free pdf download.pdf
pharmacology for dummies free pdf download.pdfpharmacology for dummies free pdf download.pdf
pharmacology for dummies free pdf download.pdf
 
Pharmacology of 5-hydroxytryptamine and Antagonist
Pharmacology of 5-hydroxytryptamine and AntagonistPharmacology of 5-hydroxytryptamine and Antagonist
Pharmacology of 5-hydroxytryptamine and Antagonist
 
CBL Seminar 2024_Preliminary Program.pdf
CBL Seminar 2024_Preliminary Program.pdfCBL Seminar 2024_Preliminary Program.pdf
CBL Seminar 2024_Preliminary Program.pdf
 
CHEMOTHERAPY_RDP_CHAPTER 4_ANTI VIRAL DRUGS.pdf
CHEMOTHERAPY_RDP_CHAPTER 4_ANTI VIRAL DRUGS.pdfCHEMOTHERAPY_RDP_CHAPTER 4_ANTI VIRAL DRUGS.pdf
CHEMOTHERAPY_RDP_CHAPTER 4_ANTI VIRAL DRUGS.pdf
 
Alzheimer’s Disease Case Conference: Gearing Up for the Expanding Role of Neu...
Alzheimer’s Disease Case Conference: Gearing Up for the Expanding Role of Neu...Alzheimer’s Disease Case Conference: Gearing Up for the Expanding Role of Neu...
Alzheimer’s Disease Case Conference: Gearing Up for the Expanding Role of Neu...
 
CHEMOTHERAPY_RDP_CHAPTER 6_Anti Malarial Drugs.pdf
CHEMOTHERAPY_RDP_CHAPTER 6_Anti Malarial Drugs.pdfCHEMOTHERAPY_RDP_CHAPTER 6_Anti Malarial Drugs.pdf
CHEMOTHERAPY_RDP_CHAPTER 6_Anti Malarial Drugs.pdf
 
Histololgy of Female Reproductive System.pptx
Histololgy of Female Reproductive System.pptxHistololgy of Female Reproductive System.pptx
Histololgy of Female Reproductive System.pptx
 
Lecture 6 -- Memory 2015.pptlearning occurs when a stimulus (unconditioned st...
Lecture 6 -- Memory 2015.pptlearning occurs when a stimulus (unconditioned st...Lecture 6 -- Memory 2015.pptlearning occurs when a stimulus (unconditioned st...
Lecture 6 -- Memory 2015.pptlearning occurs when a stimulus (unconditioned st...
 
Top Travel Vaccinations in Manchester
Top Travel Vaccinations in ManchesterTop Travel Vaccinations in Manchester
Top Travel Vaccinations in Manchester
 
Pollen and Fungal allergy: aeroallergy.pdf
Pollen and Fungal allergy: aeroallergy.pdfPollen and Fungal allergy: aeroallergy.pdf
Pollen and Fungal allergy: aeroallergy.pdf
 
CHEMOTHERAPY_RDP_CHAPTER 2 _LEPROSY.pdf1
CHEMOTHERAPY_RDP_CHAPTER 2 _LEPROSY.pdf1CHEMOTHERAPY_RDP_CHAPTER 2 _LEPROSY.pdf1
CHEMOTHERAPY_RDP_CHAPTER 2 _LEPROSY.pdf1
 
DECLARATION OF HELSINKI - History and principles
DECLARATION OF HELSINKI - History and principlesDECLARATION OF HELSINKI - History and principles
DECLARATION OF HELSINKI - History and principles
 
Hemodialysis: Chapter 5, Dialyzers Overview - Dr.Gawad
Hemodialysis: Chapter 5, Dialyzers Overview - Dr.GawadHemodialysis: Chapter 5, Dialyzers Overview - Dr.Gawad
Hemodialysis: Chapter 5, Dialyzers Overview - Dr.Gawad
 
What are the different types of Dental implants.
What are the different types of Dental implants.What are the different types of Dental implants.
What are the different types of Dental implants.
 
NARCOTICS- POLICY AND PROCEDURES FOR ITS USE
NARCOTICS- POLICY AND PROCEDURES FOR ITS USENARCOTICS- POLICY AND PROCEDURES FOR ITS USE
NARCOTICS- POLICY AND PROCEDURES FOR ITS USE
 

Laser in dermatology

  • 1. Medical Laser Application 20 (2005) 103–109 Lasers in dermatology – State of the art Roland Kaufmannà Zentrum der Dermatologie und Venerologie, Klinikum der J.W. Goethe-Universita¨t, Theodor-Stern-Kai 7, 69590 Frankfurt am Main, Germany Received 11 March 2005; accepted 14 March 2005 Abstract Owing to the increasing diversity of technological developments and to the resulting versatility of treatment options, the range of laser applications in dermatology has been expanding rapidly. A large variety of benign skin disorders originating from diverse epithelial, adnexal, vascular or other tissue elements, but also many disease-related or acquired cutaneous lesions as well as signs of aged skin or disorders of hair growth can be amenable to laser light treatment. In fact, modern laser technology does improve the majority of such cases either by means of appropriate wavelengths targeting vascular or pigmented lesions or by laser ablation widely utilized to superficially remove circumscribed disorders and moreover for skin resurfacing purposes mainly in photodamaged skin areas. As a consequence, we meanwhile face a broad number of potential indications in Dermatology. Nevertheless, also non- ablative skin rejuvenation techniques using intense pulsed light sources (IPL technology) or radiofrequency (RF) devices for a non-optical energy delivery as well as the introduction of photodynamic therapy have noticeably influenced today’s concepts especially with regard to skin rejuvenation purposes. r 2005 Elsevier GmbH. All rights reserved. Keywords: Skin disorder; Laser therapy; Review Introduction Advances in laser technology as well as an increasing demand for the removal of unsightly or disturbing skin lesions appearing throughout life have both contributed to a rapidly expanding field of laser use in Dermatology. Consequently, we today are facing not only a growing range in versatile laser systems, but also an extremely broad spectrum of potential candidate lesions [1]. As compared to other treatment options, the use of lasers aims at a selective removal of diseased target structures with maximum sparing of uninvolved adjacent skin. This selectivity can at least to some degree be achieved by choosing the appropriate laser light wavelength and pulse duration responsible for the amount of heat diffusion. Continuous-wave (cw) laser beams are used for coagulation or vaporization of skin lesions and largely depend on the penetration depth of heat energy into the skin. On the other hand, selective photother- molysis combines short pulses (avoiding relevant tissue heating) of laser light with wavelengths selectively absorbed by target chromophores (better focusing the delivered energy to target structures) thus contributing to a more specific treatment in both pigmented (melanin as a target chromophore) and vascular lesions (hemo- globin in blood vessels as chromophore), but moreover also in ablative procedures (tissue water as target). For superficial epidermal, vascular and pigmented lesions, several laser systems can be used alternatively with ARTICLE IN PRESS www.elsevier.de/mla 1615-1615/$ - see front matter r 2005 Elsevier GmbH. All rights reserved. doi:10.1016/j.mla.2005.03.005 ÃTel.: +49 69 6301 5311; fax: +49 69 6301 5117. E-mail address: Kaufmann@em.uni-frankfurt.de (R. Kaufmann).
  • 2. preference depending on the depth, volume and type of diseased or disturbing tissue structures. Lasers typically employed in destructing vascular or pigmented skin lesions are summarized in Table 1. Apart from lasers specifically targeting vascular or pigmented disorders and those achieving a circumscribed removal of super- ficial lesions, some systems are used in an attempt to either ablate or vaporize larger surface areas (e.g. resurfacing of sun-damaged skin and wrinkles) or to thermally influence the dermal tissue while sparing the epidermal surface by subablative energy delivery (sub- surfacing of textural changes and fine wrinkles in elastotic skin changes). Nevertheless, also non-ablative skin rejuvenation techniques by means of intense pulsed light sources (IPL technology) or employing radio- frequency (RF) devices for a non-optical energy delivery as well as the introduction of photodynamic photo- rejuvenation have noticeably influenced the concepts of using light sources, especially with regard to laser skin resurfacing of photo-aged skin. A survey is given in Table 2. Indications for lasers in dermatology Unpleasant skin lesions suitable for laser therapy can be present since birth (e.g. portwine stains) or might appear later in life as acquired malformations, benign tumors or otherwise disturbing lesions related to specific diseases (e.g. keratotic lesions in Darier’s disease). They can originate from a vast array of epithelial, adnexal, vascular or other tissue elements. Many of those occurring later in life are associated with the perception of an aged skin (e.g. senile angioma, senile lentigines). In addition, lasers can be indicated in disorders of hair growth, of pigmentation or even in inflammatory skin diseases, such as chronic plaque psoriasis. The majority of these conditions do at least improve by the use of appropriate laser systems available today. In some special cases, laser therapy is best combined with other techniques. Table 3 summarizes examples from diverse fields of indications. Pigmentary disorders The advantage of laser use in Dermatology is certainly most obvious in some of the various pigmented disorders that cannot be removed by any other treatment alternative [2]. One example is the transcuta- neous destruction of exogenously incorporated pigment in either decorative or traumatic tattoos [3]. Especially deeper non-professional black pigments are usually successfully lightened by diverse pigment-specific laser types (Q-switched 1064 nm Nd:YAG-, 694 nm Ruby-, or 755 nm Alexandrite Lasers) within only few treatment sessions [4]. Ruby- and Alexandrite-laser wavelengths ARTICLE IN PRESS Table 1. Lasers frequently used in vascular and pigmented skin lesions Therapeutic purpose Laser type Mode Wavelength (nm) 1. Vessels Superficial photocoagulation Argon cw 488, 514 KTP Pulsed/Q-switch 532 Diode Long pulse 910, 980 Dyed Long pulse 595, 600 Deep photocoagulation Nd:YAG cw Long pulse 1064 Selective photothermolysis Dye Pulsed 585 2. Pigments Selective photothermolysis Ruby Q-switch 694 Alexandrite Q-switch 755 Nd:YAG Q-switch 1064 Table 2. Lasers and light sources used for skin resurfacing Mode Light sources 1. Ablative laser-resurfacing Pure ablation Er:YAG laser Vaporization Pulsed CO2 laser Combined systems CO2/Er:YAG combination Er:YAG laser with ablative and thermal mode 2. Non-ablative techniques Subsurfacing e.g. Longpulse 1320 nm Nd:YAG laser Er:YAG laser in thermal mode Photorejuvenation IPL systems Photodynamic rejuvenation Photosensitizer plus IPL or PDT lamp R. Kaufmann / Medical Laser Application 20 (2005) 103–109104
  • 3. are also appropriate for green pigments, whereas frequency-doubled Q-switched Nd:YAG laser irradia- tion at 532 nm typically can improve red pigments [5]. From recent in vitro analysis it has been speculated, if potentially hazardous compounds generated by pulsed laser light cleavage from widely used tattoo dyes might be toxic or even carcinogenic and thus bear yet unreported risks [6]. Other frequent indications for Q-switched laser irradiation are flat pigmented seborrhoic keratosis clinically presented as senile lentigines, also solar lentigines. However, these more macular type of age spots typically also located on the dorsum of the hands or in the area of the de´ collete´ can also be very superficially dermabraded or ablated (mainly removal of epithelium in a sense of a laser peeling) using an Er:YAG laser [7]. Especially in these very delicate locations laser ablation has to be performed with great caution, since the photo-aged skin is not only atrophic but in non-facial areas also might lack adnexal structures required for re-epithelization. Among the more critical fields of indications are melanocytic nevi. Among these, without any doubt, patients presenting with Nevus of Ota or acquired Ota-like dermal melanocytosis usually experience considerable improve- ments following Q-switched laser treatment series, also in combination with prior ablative procedures or bleaching agents [8]. Even incomplete clearing can be considered a major help, since any improvement will be suited to relieve much of the psychological trauma usually associated with all disfiguring types of nevi. Also it is proven that benign junctional melanocytic nevi lasers can lighten the lesions, whereas they tend to recur in deeper compound or dermal types of melanocytic nevi. In larger congenital nevi, lasers have been used to either reduce the pigment or to remove associated hair growth [9,10]. Ablative lasers are routinely applied as an alternative to mechanical dermabrasion of larger ARTICLE IN PRESS Table 3. Laser treatment in dermatology Indications Photocoagulation Selective photothermolysis Ablation UV phototherapy Pigments Vessels Pigmentary disorders e.g. Tattoos + + Nevus of Ota + Hypopigmented lesions (e.g. vitiligo) + Vascular lesions e.g. Teleangiectasias + + Lip angiomas + Senile angiomas + Superficial varicosities + + Varicosis of saphenous vein +a Epithelial and adnexal lesions e.g. Epidermal nevi + Seborrhoic keratosis + Viral warts + Sebaceous gland hyperplasias + Rhinophymab + Dermal lesions e.g. Syringoma + Xanthelasma + Scar revision + + + Lesions in photo-aged skin e.g. Actinic keratosis + Solar lentigines + + Superficial wrinkles + Others e.g. Laser epilation + + Plaque psoriasis + + Examples of indications and involved tissue interactions. a As fiber guided endoluminal procedure. b In combination with other techniques (shaving, elektrocauterization). R. Kaufmann / Medical Laser Application 20 (2005) 103–109 105
  • 4. congenital nevi early in life, especially in critical areas (e.g. periorbital or anogential skin) [11]. However, deeper parts or excessive hair follicles cannot be eliminated by this approach. Thus far, no reports of malignant transformation after such treatments have appeared, though pseudomelanoma might result from any incomplete nevus removal and early melanoma lesions can easily be erroneously mistaken for benign spots. Therefore, in all suspicious melanocytic lesions fulfilling criteria of atypia or initial malignancy, histology is mandatory prior to any destructive type of treatment. Apart from other diverse dyschromias presented clinically as hyperpigmented lesions, lasers might also be considered as a therapeutic tool in hypopigmented conditions. In particular, 308 nm UV-excimer laser light has been used successfully for repigmentation of vitiligo [12], but also in hypopigmented scars or striae alba [13]. On the other hand, vitiligo patients treated with the intention of complete depigmentation can be relieved of recalcitrant pigment by the use of Q-switched lasers [14]. Vascular lesions Vascular skin disorders have been among the first lesions treated with lasers and today a large number of systems are available for this ailment, providing either superficial or deep photocoagulation as well as selective photothermolysis of smaller delicate vessels located within the skin surface [15]. Table 1 summarizes lasers frequently used in vascular skin lesions. A superficial photocoagulation is achievable in the visible spectral range (Argon, KTP, Krypton, Diode), while light of long pulsed or continuous wave lasers in the near infrared (e.g. 1064 nm Nd:YAG) penetrate to a deeper level leading to larger coagulation volumes. Pulsed laser light of appropriate wavelengths matching the absorp- tion peaks of oxyhemoglobin (585, 590 nm) will instead destroy fine capillary vessels leading to initial hemor- rhage with visible immediate bluish discoloration. Flashlamp-pumped dye lasers are mainly indicated in children with superficial and light-red portwine stains [16]. In childhood hemangiomas instead, only improve- ment of superficial components can be induced, while deeper parts require larger volumes of tissue coagula- tion, as with cw Nd:YAG-laser light irradiation. For many indications in daily practice however, superficial photocoagulation with continuous or quasi-continuous long pulse systems will usually be adequate (e.g. facial teleangiectasias, senile angiomas) [17]. In teleangiectatic disorders of the lower extremities, instead, the use of laser light sources bears a higher risk of unwarranted side effects (atrophy, depigmentation, scarring) and the results have not been as successful as they are in facial skin. In superficial varicosities enhanced results might be obtained by modified pulse durations and use of more penetrating, longer wavelengths (e.g. long pulse Nd:YAG lasers at 1064 nm). In varicose lesser or greater saphenous veins, endovenous laser treatment is an increasingly used and newly developed method to induce thrombotic occlusion via endoluminal steam bubble formation with subsequent heat injury of the vessel wall [18]. Apart from diode lasers (e.g. 940 nm at pulses of 15 J) 1064 nm Nd:YAG laser light is delivered with an optical fibre in a continuous wave mode and irradiations of 10 s duration at 10–15 W are currently used for this photocoagulative purpose [19,20]. Epithelial, adnexal and cutaneous lesions Among epithelial disorders, certain variants of epidermal nevi are well suited for laser ablative procedures, especially in areas critically in need of dermabrasion. Other examples of lasers being used complementarily or as an alternative to mechanical dermabrasion are genetically determined disorders, such as superficial lesions in Hailey–Hailey’s or Darier’s disease [21]. Among the more localized lesions, sebor- rhoic keratosis (including lentigo senile as superficial variant) are easily ablated, particularly in more delicate areas. Among the dermal and adnexal disorders, syringomas and xanthelasmata are candidates for a stepwise tissue sparing laser ablation [11]. In particular, the Erbium-YAG laser can achieve a precise and fine ablation in this subtle indication. Moreover, in solitary or multiple sebaceous gland hyperplasia as well as in the condition of rhinophyma, tissue ablation or vaporiza- tion has been used. Rhinophyma is usually associated with rosacea, where a combined conservative and surgical approach is required. Laser applications include the photocoagulation of teleangiectatic components in this disorder, while vaporization has been widely employed as an alternative to surgical or electrocaustical shaving techniques in rhinophyma. Laser vaporization can avoid bleeding otherwise associated with derma- shaving or dermabrasion. As an alternative to CO2-laser vaporization, Erbium lasers can be used in less angiomatous tumor formations or with systems allowing a combined hemostasis function (dual mode Er:YAG lasers). Lasers in photo-aged skin In photo-aged skin, lasers are mainly used for resurfacing purposes, to improve superficial wrinkles related to cutaneous elastosis, to treat cysts and comedones in Morbus Favre Racouchot or when removing multiple solar lentigines or actinic keratoses in a given aesthetic unit [17]. Skin resurfacing of sun- damaged areas can be either performed by a thermal ARTICLE IN PRESS R. Kaufmann / Medical Laser Application 20 (2005) 103–109106
  • 5. vaporization (pulsed CO2 laser) [22], or by using a less heat damaging pulsed skin ablation (Er:YAG laser) even in a single pass fashion [23]. All laser resurfacing procedures generate injured areas analogous to erosions or deeper excoriations with a subsequent risk of bacterial, viral or even fungal infections, especially in burned surfaces after thermal vaporization. Re-epithe- lization following initial edema, exsudation and crusting can result in longstanding erythema and post-inflam- matory pigmentary changes (early transient hyperpig- mentation, late lasting depigmentation) [24]. As an alternative to laser skin ablation, non-ablative laser systems are also used in an effort to generate heat production within the dermal connective tissue without necessarily removing the overlying epidermal skin sur- face. This ‘‘subsurfacing’’ or non-ablative skin remodel- ing can be achieved by delivering light of appropriate wavelength capable of penetrating deeply enough through the surface while cooling the epidermis during the light–tissue interaction in order to prevent superficial heat injury. It attempts to stimulate dermal inflamma- tion and subsequent collagen formation [25]. The induction of a controlled heat injury within the dermal connective tissue while leaving the epidermal layer intact also circumvents a surface wounding and consecutive ‘‘down-time’’ during the phase of tissue repair. Such a transepidermal energy delivery has been achieved by long-pulsed subablative laser irradiation of diverse wavelengths within the visible and infrared spectral range paralleled by a combined surface cooling. How- ever, apart from some tightening initiated due to an initial edema, the results with regards to any wrinkle improvement are less remarkable than with tissue ablative work unless some degree of dermal fibrosis can be induced. As an alternative to laser systems, polychromatic flashlamp sources (IPL systems, e.g. at 690–755 nm wavelength) are also used. The removal of age-related vascular changes or pigmentary disorders along with a lightening of a freckled aged skin surface by such laser or IPL-light sources is generally referred to as ‘‘type I subsurfacing’’ while the less successful skin tightening along with some improvement in fine wrink- ling or textural changes is termed ‘‘type II subsurfacing’’ [26] Moreover, photodynamic treatment of larger areas of sun-damaged facial skin can achieve some degree of tissue tightening, which is named photodynamic facial rejuvenation [27]. Newer alternatives combine either IPL sources with RF energy or use RF devices (selective electrothermolysis) for the same purpose [28]. Disorders of hair growth Among the most rapid expanding fields of laser and light-based technological developments within recent years are certainly hair removal procedures [29]. Photoepilation is especially helpful in fair skin types with dark hair leading to reduction of hair growth, as well as lightening and thinning of remaining hairs in the majority of individuals after repeated treatment sessions with perifollicular pigmentary changes being the most common adverse side effects [30]. Laser systems commonly used include the ruby- (694 nm), alexandrite- (755 nm), diode- (810) and Nd:YAG laser (1064 nm) [31]. However, many physicians prefer the use of non- coherent IPL technology for this purpose [26]. Inflammatory skin diseases Among some other inflammatory skin diseases amenable to light therapy, in particular, psoriasis shows a high prevalence and is a common therapeutic challenge. It has been treated by use of ablative lasers, but also by laser phototherapy in order to improve chronic plaque-type lesions. Laser ablation can achieve control of recalcitrant solitary plaques [32], whereas 308 nm UV-excimer laser light has been shown to yield responses as expected from UVB-phototherapy of respective circumscribed lesions and provides a well tolerated means to clear plaques in mild to moderate disease [33,34]. Most recently, also a non- laser 308 nm monochromatic excimer light delivery system has been evaluated in skin diseases for the same purpose [35]. Scar revision Various types of hypertrophic or depressed scar formations, including acne or chicken pox scars, can benefit from laser resurfacing or repetitive superficial laser peeling. Especially in acne patients, a more controlled and homogeneous removal of the skin surface is possible as compared to mechanical dermabrasion. Less pronounced cases might also be improved by using laser light in a non-ablative technique (e.g. Nd:YAG- laser subsurfacing) [36] Repetitive treatment sessions and combining the procedure with other techniques, such as punch elevations or fine excisions and subci- sions, will add to a stepwise improvement over longer periods. Also in keloids, laser ablation is best combined with additional techniques (e.g. compression, steroid injections, cryotherapy). In surgical scars laser ablation is able to flatten uneven edges after flaps or grafts. Moreover, in hypertrophic and teleangiectatic scars as well as in keloids flashlamp, pumped dye lasers can be indicated. Finally, hyperpigmented zones might benefit from appropriate Q-switched lasers systems, and in depigmented scars 308 nm excimer laser light has been used successfully [13]. ARTICLE IN PRESS R. Kaufmann / Medical Laser Application 20 (2005) 103–109 107
  • 6. Laser-assisted procedures In several procedures and indications, lasers are used as adjunct devices combined with other suitable techniques. Examples are laser-assisted grafting of vitiligo lesions [37], laser-assisted hair grafting [38] or laser-assisted removal of osteoma cutis [39] or sea urchin spines [40]. Zusammenfassung Laser in der Dermatologie – Aktueller Stand Vielfa¨ ltige technische Entwicklungen und daraus resultierende Therapieoptionen haben gerade in der Dermatologie zu einer raschen und weiten Verbreitung von Laseranwendungen gefu¨ hrt. Neben den zahlreichen benignen Neu- und Fehlbildungen des Epithels, der Adnexe, der Gefa¨ ße und anderer Gewebekomponenten stellen auch viele krankheitsassoziierte oder erworbene Hautla¨ sionen, ebenso Vera¨ nderungen der Altershaut oder Sto¨ rungen des Haarwuchses Indikationen fu¨ r eine Lasertherapie dar. So kann in den meisten dieser Fa¨ lle mithilfe moderner Lasersysteme eine Besserung erzielt werden, sei es durch den Einsatz geeigneter Wellenla¨ n- gen bei vaskula¨ ren oder pigmentierten Hautvera¨ nde- rungen oder durch die weit verbreitete Laserablation zum Abtragen umschriebener La¨ sionen oder zum soge- nannten Resurfacing, insbesondere von lichtgescha¨ digten Hautarealen. Daher sind wir heute in der Dermatologie mit einem besonders breiten Indikatonsspektrum fu¨ r potentielle Laseranwendungen konfrontiert. Allerdings haben sowohl die Einfu¨ hrung hochenergetischer Blitz- lampen (IPL-Technologie) wie auch nichtoptischer Radiofrequenz-Gera¨ te oder der photodynamischen Therapie die heutigen Konzepte der Therapie insbeson- dere auf dem Gebiet der Behandlung altersassoziierter Hautvera¨ nderungen im Hinblick auf den Lasereinsatz relativiert. r 2005 Elsevier GmbH. All rights reserved. Schlu¨sselwo¨rter: Hauterkrankungen; Lasertherapie; U¨ bersicht References [1] Tanzi EL, Lupton JR, Alster TS. Lasers in dermatology: four decades of progress. J Am Acad Dermatol 2003;49:1–31. [2] Dover JS, Kane KS. Lasers for the treatment of cutaneous pigmented disorders. In: Arndt KA, Dover JS, Olbricht S, editors. Lasers in cutaneous and aesthetic surgery. Philadelphia: Lippincott Raven; 1997. p. 165–87. [3] Graudenz K, Greve B, Raulin C. Diffundierte Schmutz- und Schmuckta¨ towierungen. Entfernung durch gu¨ te- geschaltete Laser. Hautarzt 2003;54:756–9. [4] Kuperman-Beade M, Levin VJ, Ashinoff R. Laser removal of tattoos. Am J Clin Dermatol 2001;2:21–5. [5] Adatto M. Laser tattoo removal: benfits and cavets. Med Laser Appl 2004;19:175–85. [6] Vasold R, Naarmann N, Ulrich H, Fischer D, Ko¨ nig B, Landthaler M, Ba¨ umler W. Tattoo pigments are cleaved by laser light – the chemical analysis in vitro provide evidence for hazardous compounds. Photochem Photo- biol 2004;80:185–90. [7] Jimenez G, Spencer JM. Erbium:YAG laser resurfacing of the hands, arms, and neck. Dermatol Surg 1999;25: 831–4. [8] Momosawa A, Yoshimura K, Uchida G, Sato K, Aiba E, Matsumoto D, Yamaoka H, Mihara S, Tsukamoto K, Harii K, Aoyama T, Iga T. Combined therapy using Q- switched ruby laser and bleaching treatment with tretinoin and hydroquinone for acquired dermal melano- cytosis. Dermatol Surg 2003;29:1001–7. [9] Noordzij MJ, van den Broecke DG, Alting MC, Kon M. Ruby laser treatment of congenital melanocytic nevi: a review of the literature and report of our own experience. Plast Reconstr Surg 2004;114:660–7. [10] Westerhof W, Gamei M. Treatment of acquired junc- tional melanocytic naevi by Q-switched and normal mode ruby laser. Br J Dermatol 2003;148:80–5. [11] Kaufmann R, Beier C. Laser skin ablation: an update on aesthetic and medical indications. Med Laser Appl 2004;19:212–22. [12] Hadi SM, Spencer JM, Lebwohl M. The use of the 308- nm excimer laser for the treatment of vitiligo. Dermatol Surg 2004;30:983–6. [13] Aleciades-Armenakas MR, Bernstein LJ, Friedmann PM, Geronemus RG. The safety and efficacy of the 308 nm excimer laser for pigment correction of hypopig- mented scars and striae alba. Arch Dermatol 2004;140: 955–60. [14] Rao J, Fitzpatrick RE. Use of the Q-switched 755 nm alexandrite laser to treat recalcitrant pigment after depigmentation therapy for vitiligo. Dermatol Surg 2004; 30:1043–5. [15] Landthaler M, Ulrich H, Hohenleutner S, Wimmershoff M, Hohenleutner U. Role of laser therapy in dermatology – clinical aspects. Dermatology 2004;208:129–34. [16] Wimmershoff MB, Wenig M, Hohenleutner U, Land- thaler M. Die Behandlung von Feuermalen mit dem blitzlampengepumpten gepulsten Farbstofflaser. Ergeb- nisse aus 5 Jahren klinischer Erfahrung. Hautarzt 2001;52:1001–15. [17] Kaufmann R. Role of Erbium:YAG Laser in the treatment of the aged skin. Clin Exp Dermatol 2001;26: 631–6. [18] Proebstle TM, Lehr HA, Kargl A, Espinola-Klein C, Rother W, Bethge S, Knop J. Endovenous treatment of the greater saphenous vein with a 940-nm diode laser: thrombotic occlusion after endoluminal thermal damage by laser-generated steam bubbles. J Vasc Surg 2002;35: 729–36. [19] Chang CJ, Chua JJ. Endovenous laser photocoagulation (EVLP) for varicose veins. Lasers Surg Med 2002;31: 257–62. ARTICLE IN PRESS R. Kaufmann / Medical Laser Application 20 (2005) 103–109108
  • 7. [20] Proebstle TM, Gul D, Kargl A, Knop J. Endovenous laser treatment of the lesser saphenous vein with a 940 nm diode laser: early results. Dermatol Surg 2003;29:357–61. [21] Beier C, Kaufmann R. Erbium:YAG laser therapy of Darier’s and Hailey–Hailey’s disease. Arch Dermatol 1999;135:423–7. [22] Fitzpatrick RE, Goldman MP, Satur NM, Tope W. Pulsed carbon dioxide laser resurfacing of photoaged facial skin. Arch Dermatol 1996;132:395–402. [23] Avram DK, Goldman MP. The safety and effectiveness of single-pass erbium:YAG-laser in the treatment of mild to moderate photodamage. Dermatol Surg 2004;30: 1073–6. [24] Nanni CA, Alster T. Complications of carbon dioxide laser resurfacing. An evaluation of 500 patients. Dermatol Surg 1998;24:315–20. [25] Sadick NS. Update on non-ablative light therapy for rejuvenation: a review. Lasers Surg Med 2003;32:120–8. [26] Bjerring P. Photorejuvenation – an overview. Med Laser Appl 2004;19:186–95. [27] Ruiz-Rodriguez R, Sanz-Sanchez T, Cordoba S. Photo- dynamic photorejuvenation. Dermatol Surg 2002;28: 742–4. [28] Ruiz-Espara J. Noninvasive lower eyelid blepharoplasty: a new technique using nonablative radiofrequency on periorbital skin. Dermatol Surg 2004;30:125–9. [29] Sadick NS. Laser hair removal. Facial Plast Surg Clin North Am 2004;12:191–200. [30] Lepselter J, Elman M. Biological and clinical aspects in laser hair removal. J Dermatol Treat 2004;15: 72–83. [31] Bouzari N, Tabatabai H, Abbasi Z, Firooz A, Dowlati Y. Laser hair removal: comparison of long-pulsed Nd:YAG, long-pulsed alexandrite, and long-pulsed diode lasers. Dermatol Surg 2004;30:498–502. [32] Boehncke WH, Ochsendorf F, Wolter M, Kaufmann R. Ablative techniques in psoriasis vulgaris resistant to conventional therapies. Dermatol Surg 1999;25: 618–21. [33] Grema H, Raulin C. Der Excimer-Laser in der Derma- tologie und a¨ sthetischen Medizin. Hautarzt 2004;55: 48–57. [34] Rodewald EJ, Housman TS, Mellen BG, Feldman SR. Follow-up survey of 308 nm laser treatment of psoriasis. Laser Surg Med 2002;31:202–6. [35] Aubin F, Vigan M, Puztenat E, Blanc D, Drobacheff C, Deprez P, Humbert P, Laurent R. Evaluation of a novel 308 nm monochromatic excimer light delivery system in dermatology: a pilot study in different chronic localized dermatoses. Br J Dermatol 2005;152:99–103. [36] Friedman PM, Jih MH, Skover GR, Payonk GS, Kimyai- Asadi A, Geronemus RG. Treatment of atrophic facial acne scars with the 1064 nm Q-switched Nd:YAG laser: a six-month follow-up study. Arch Dermatol 2004;140: 1337–41. [37] Kaufmann R, Greiner D, Kippenberger S, Bernd A. Grafting of in vitro cultured melanocytes onto laser- ablated lesions in vitiligo. Acta Dermatol Venereol 1998;78:136–8. [38] Podda M, Spieth K, Kaufmann R. Er:YAG laser-assisted hair transplantation in cicatricial alopecia. Dermatol Surg 2000;26:1010–4. [39] Ochsendorf FR, Kaufmann R. Erbium:YAG laser-assisted treatment of miliary osteoma cutis. Br J Dermatol 1998; 138:371–2. [40] Boer A, Ochsendorf FR, Beier C, Kaufmann R. Effective removal of sea-urchin spines by erbium:YAG laser ablation. Br J Dermatol 2001;145:169–70. ARTICLE IN PRESS LISA laser products OHG Max - Planck - Str. 1 D - 37191 Katlenburg fon: +49 (0)5556 - 9938 - 0 web: www.lisalaser.com Germany LISAwww.lisalaser.com RevoLix high power 2 micron cw laser RevoLix Jr. low power 2 micron cw laser Sphinx Holmium-Laser DioLix Diode-Laser Competence in surgical 2 micron laser technology Visit us at DGLM Congress, Munich 15.- 16.06.05 Booth ICM.117 ______________________ Advertisement _____________________ R. Kaufmann / Medical Laser Application 20 (2005) 103–109 109