you will get knowledge about the ptosis, its different types, its examination, its measurement, its treatment in detail.
different eyelid muscles such as LPS, Orbicularis oculi and frontalis are also explained.
The oculomotor nucleus complex present in the midbrain, at the level of the superior colliculus
Contains Main motor nucleus and Accessory parasympathetic nucleus (Edinger-Westphal nucleus)
Fibers pass between the posterior cerebral artery and the superior cerebellar artery to reach the cavernous sinus.
During this course, the oculomotor nerve lies lateral to the posterior communicating artery.
The nerve then divides into a superior and inferior division and enters the orbit through the superior orbital fissure
Third nerve palsy results from dysfunction of the nerve along its pathway from the midbrain to the extraocular muscles it innervates.
Third nerve palsies can cause dysfunction of the somatic muscles (SR ,IR,MR,IO, levator palpebral superioris) and autonomic muscles (the pupillary sphincter and ciliary muscle.)
classification
1. Complete or incomplete palsy
Complete: Involves both superior and inferior divisions of the nerve.
Incomplete: Involves superior division, inferior division (rarely), or an isolated muscle
2. Total palsy or partial paresis
● Total: Full restriction of extraocular muscles is present.
● Partial: Restriction of extraocular muscles is limited.
3. Pupil-involving or pupil-sparing palsy
● Pupil involving: Pupil is dilated, with an accommodative insufficiency.
● Pupil sparing: Pupil and accommodative function are normal.
The oculomotor nucleus complex present in the midbrain, at the level of the superior colliculus
Contains Main motor nucleus and Accessory parasympathetic nucleus (Edinger-Westphal nucleus)
Fibers pass between the posterior cerebral artery and the superior cerebellar artery to reach the cavernous sinus.
During this course, the oculomotor nerve lies lateral to the posterior communicating artery.
The nerve then divides into a superior and inferior division and enters the orbit through the superior orbital fissure
Third nerve palsy results from dysfunction of the nerve along its pathway from the midbrain to the extraocular muscles it innervates.
Third nerve palsies can cause dysfunction of the somatic muscles (SR ,IR,MR,IO, levator palpebral superioris) and autonomic muscles (the pupillary sphincter and ciliary muscle.)
classification
1. Complete or incomplete palsy
Complete: Involves both superior and inferior divisions of the nerve.
Incomplete: Involves superior division, inferior division (rarely), or an isolated muscle
2. Total palsy or partial paresis
● Total: Full restriction of extraocular muscles is present.
● Partial: Restriction of extraocular muscles is limited.
3. Pupil-involving or pupil-sparing palsy
● Pupil involving: Pupil is dilated, with an accommodative insufficiency.
● Pupil sparing: Pupil and accommodative function are normal.
The lecture concern the eyelids and contain the following subjects and medical terms:
* Anatomy
* Congenital ptosis
* blepharophimosis
* *Epicanthus
* Ptosis syndrome
* amblyopia (Lazy eye)
* Strabismus and its types(Hypertropia, Hypotropia, Esotropia, Exotropia )
* The Fasanella-Servat procedure(video) for correcting upper ptosis
* levator resection(video) another procedure for correting ptosis
* Acquired ptosis and its ptosis
Ptosis is known as the drooping of the upper eyelid, and the patient usually presents with the complaint of the defect in vision and cosmesis. It can be congenital or acquired, or it can be neurogenic, myogenic, aponeurotic, mechanical, or traumatic in origin.
you will get information and knowledge about the direct ophthalmic instrument known as ophthalmoscope.
its principle, parts, types, its different filters, techniques, uses, and its method is explained in these slides.
you will get information and knowledge about different dyes, their uses in the diagnosis of ocular diseases in detail.
different dyes are as follows: Fluorescein, Rose Bengal, ICG, Lissamine Green, and Trypan Blue.
you will get information about the layers of sclera and its diseases such as episcleritis and scleritis.
types of scleritis and episcleritis are also eplained in these slides. such as diffuse and nodular types of episclera, necrotizing and non-necrotizing types of anterior scleritis, posterior sleritis.
there etiologies. complications, investigations and treatment are also explained in detail.
you will get information about the staphyloma, its types, its etiology, its pathogenesis and its treatment.
you will know about the clinical types of staphyloma in detailed such as anterior staphyloma, posterior staphyloma, equatorial staphyloma, ciliary staphyloma, and Intercalary staphyloma.
you can get information about the blue sclera, its causes, its associations, its relation to other disorders and syndromes.
its associations such as Osteogenesis imperfecta and Ehlers-Danlos syndrome type VI are mostly explained with their images in these slides.
you can get information about the extraocular muscles which are responsible for the movement of the eyes in different direction, near and distance.
you will know how many extraocular muscles and how they work....
you will get information about the different position of gazes....
you can get information about the glaucoma and its possible all types, its signs and symptoms, its pathogenesis, and its treatment (with medicines and with surgery).
you will know that how it affects the eye and causes the visual filed defects.
you will know that how it occurs in children and causes loss of vision.
New Directions in Targeted Therapeutic Approaches for Older Adults With Mantl...i3 Health
i3 Health is pleased to make the speaker slides from this activity available for use as a non-accredited self-study or teaching resource.
This slide deck presented by Dr. Kami Maddocks, Professor-Clinical in the Division of Hematology and
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STATEMENT OF NEED
Mantle cell lymphoma (MCL) is a rare, aggressive B-cell non-Hodgkin lymphoma (NHL) accounting for 5% to 7% of all lymphomas. Its prognosis ranges from indolent disease that does not require treatment for years to very aggressive disease, which is associated with poor survival (Silkenstedt et al, 2021). Typically, MCL is diagnosed at advanced stage and in older patients who cannot tolerate intensive therapy (NCCN, 2022). Although recent advances have slightly increased remission rates, recurrence and relapse remain very common, leading to a median overall survival between 3 and 6 years (LLS, 2021). Though there are several effective options, progress is still needed towards establishing an accepted frontline approach for MCL (Castellino et al, 2022). Treatment selection and management of MCL are complicated by the heterogeneity of prognosis, advanced age and comorbidities of patients, and lack of an established standard approach for treatment, making it vital that clinicians be familiar with the latest research and advances in this area. In this activity chaired by Michael Wang, MD, Professor in the Department of Lymphoma & Myeloma at MD Anderson Cancer Center, expert faculty will discuss prognostic factors informing treatment, the promising results of recent trials in new therapeutic approaches, and the implications of treatment resistance in therapeutic selection for MCL.
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Hematology/oncology fellows, attending faculty, and other health care professionals involved in the treatment of patients with mantle cell lymphoma (MCL).
Learning Objectives
1.) Identify clinical and biological prognostic factors that can guide treatment decision making for older adults with MCL
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These lecture slides, by Dr Sidra Arshad, offer a quick overview of physiological basis of a normal electrocardiogram.
Learning objectives:
1. Define an electrocardiogram (ECG) and electrocardiography
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4. Differentiate between intervals and segments
5. Enlist some common indications for obtaining an ECG
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1. Chapter 11, Guyton and Hall Textbook of Medical Physiology, 14th edition
2. Chapter 9, Human Physiology - From Cells to Systems, Lauralee Sherwood, 9th edition
3. Chapter 29, Ganong’s Review of Medical Physiology, 26th edition
4. Electrocardiogram, StatPearls - https://www.ncbi.nlm.nih.gov/books/NBK549803/
5. ECG in Medical Practice by ABM Abdullah, 4th edition
6. ECG Basics, http://www.nataliescasebook.com/tag/e-c-g-basics
Ethanol (CH3CH2OH), or beverage alcohol, is a two-carbon alcohol
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neurochemical systems and has rewarding and addictive properties. It
is the oldest recreational drug and likely contributes to more morbidity,
mortality, and public health costs than all illicit drugs combined. The
5th edition of the Diagnostic and Statistical Manual of Mental Disorders
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disorder called alcohol use disorder (AUD), with mild, moderate,
and severe subclassifications (American Psychiatric Association, 2013).
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The four main behavioral effects of AUD are impaired control over
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comorbidities, fetal alcohol spectrum disorders, genetic risk factors, and
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3. PTOSIS
Ptosis is an abnormally low
position of the upper lid.
Grading and severity
Normally upper eyelid cover 1/6th of cornea
Mild < or = 2mm
Moderate = 3mm
Severe > 4mm
4. FUNCTIONAL ANATOMY
Levator Palpebral Superioris (LPS):
Is the primary muscle responsible for lid elevation.
It arises from the back of the orbit and extends forwards
over the cone of eye muscles.
It inserts into the eyelid and the tarsal plate, a fibrous
semicircular structure which gives the upper eyelid its
shape.
The LPS is supplied by the superior division of the
oculomotor nerve.
5. Muller’s Muscle:
The way that the LPS attaches to the tarsal plate is
modified by the underlying Müller's muscle.
This involuntary muscle, comprising sympathetically
innervated smooth muscle
Has the capacity to 'tighten' the attachment and so raise
the lid a few millimetres.
Frontalis and Orbicularis Oculi muscles:
Both muscles supplied by the facial nerve.
Frontalis contraction helps to elevate the lid by acting
indirectly on the surrounding soft tissues, while orbicularis
oculi contraction depresses the eyelid.
6. CLASSIFICATION
It may be
Acquired
Congenital
Acquired
1) Neurogenic
2) Myogenic
3) Aponeurotic
4) Mechanical
5) Neurotoxic
7. 1). NEUROGENIC
It caused by an innervational defect such as 3rd nerve
paresis and Horner's Syndrome.
3rd nerve misdirection syndrome
• Rare, unilateral
• Aberrant regeneration following acquired 3rd nerve palsy
• Bizarre movements of upper lid accompany eye
movements
• Pupil is occasionally involved
• Right ptosis primary position
• Worse on right gaze
• Normal on left gaze
8. HORNER SYNDROME:
It is a relatively rare disorder characterized by:
A constricted pupil (miosis)
Drooping of the upper eyelid (ptosis)
Absence of sweating of the face (anhidrosis)
Sinking of the eyeball into the bony cavity that protects
the eye (enophthalmos)
9. 2). MAYOGENIC:
Caused by the myopathy of the levator muscle itself or
by the impairment of the transmission of impulses at the
neuro muscular junction
Acquired myogenic occurs in myasthenia gravis
myotonic dystrophy and progressive external
ophthalmoplegia.
10. 3). APONEURATIC
Caused by a defect in
the levator aponeurosis
Involutional ptosis
Aponeuratic ptosis also called senile or involutional ptosis, is the
most common type of acquired ptosis. It is caused by a disinsertion
or dehiscence of the levator aponeurosis from the tarsus.
Clinical exam reveals a high lid crease, generally good levator
function and typically worsening of the ptosis on downgaze.
Such patients tend to do well with surgical correction which
involves advancement and reattachment of the levator
aponeurosis to the anterior tarsal surface.
11. 4). MECHANICAL:
With mechanical ptosis, the eyelid is weighed down by
excessive skin or a mass.
Traumatic ptosis is caused by an injury to the eyelid.
Either due to an accident or other eye trauma.
This injury compromises or weakens the levator muscle
12. CONGENITAL
1) Simple congenital ptosis
2) Congenital ptosis
3) Congenital synkinetic ptosis
4) Blepharophimosis Syndrome
1). Simple congenital ptosis
Not associated with any anomaly
13. 2). Congenital ptosis
It results from a failure of neuronal migration or development with
muscular sequalae.
Superior Rectus weakness
Compensatory Chin elevation
Absent upper lid crease
In downward gaze the ptotic lid is higher then the normal because
of poor relaxation of the levator function
3). Congenital Synkinetic ptosis
Marcus Gun Jaw winking Ptosis
14. MARCUS GUN JAW WINKING PTOSIS
About 5% of the congenital cases are associated with the Marcus
gun jaw winking phenomenon.
Retraction of the ptotic lid in conjunction with stimulation of the
ipsilateral
Pterygoid muscle by chewing, sucking, opening the mouth
Less common stimuli to winking include jaw protrusion, smiling,
swallowing and clenching of teeth
Jaw winking does not improve with age
Exact aetiology is unclear
15. PSEUDOPTOSIS
False impression of the ptosis which may be caused by:
LACK OF SUPPORT
Lack of support of the lids by the globe ma be due to the orbital
volume deficient associated with enophthalmos.
CONTRALATERAL LID RETRACTION
Which is detected by comparing the levels of upper eyelids the
margin of the upper lid mat cover the superior 2mm of cornea
IPSILATERAL HYPOTROPIA
Upper lid follows the globe downward
BROW PTOSIS
• Due to excessive skin on the brow
16.
17. SIGN AND SYMPTOMS OF PTOSIS
Dropping eyelid
Raising of the eyebrows to lift the eyelids for better
vision
Watery eye
Tilting the head
Aching in and around the eyes
Looking tired
Double vision
Difficulty closing the eyes or blinking
18. EVALUATION OF PTOSIS:
History:
Age of onset
Duration
One/both eye
Diurnal variability
Associated history:
o Diplopia
o Dysphagia
o Muscle weakness
Vision
19. Associated with:
Jaw movements
Abnormal ocular movements
Abnormal head posture
History of:
Trauma or previous surgery
Poisoning
Use of steroid drops
Any reaction with anesthesia
Bleeding tendency
Previous photographs may prove to be of great help.
Is there a family history of ptosis or of other muscle
weakness?
20. OCULAR EXAMINATION
Normal position of eyelids:
The normal upper eyelid in primary position
Crosses the iris b/w the limbus (junction of the iris and sclera)
and the pupil
Usually 1 mm to 2 mm below the limbus
The lower lid touches or crosses slightly above the limbus.
Normally there is no sclera showing above the iris.
Palpebral fissures:
It is normally 9 mm to 12 mm from upper to lower lid margin
Visual Acuity:
Best-corrected visual acuity should be assessed to record any
amblyopia if present, especially in cases of congenital ptosis.
21. PUPILLARY EXAMINATION
TO diagnosis Horner’s syndrome
Involvement in a case of third nerve palsy
TOTAL UNILATERAL PTOSIS
Complete third nerve palsy.
MILD TO MODERATE PTOSIS
Horner's syndrome
partial third nerve palsy.
MILD TO MODERATE BILATERAL PTOSIS
Neuromuscular disorders such as MG
Muscular dystrophy
Ocular myopathy
22. MEASUREMENTS
1) Margin reflex distance
2) Vertical fissure height
3) LPS action
4) Lid crease level
5) Lid level on down gaze
23. 1). MARGIN REFLEX DISTANCE:
Margin-to-reflex distance 1 (MRD1)
• When light is thrown on the cornea, a reflection
occurs.
• The distance from the central pupillary light reflex to
the upper eyelid margin with the eye in primary gaze.
• If the margin is above the light reflex the MRD 1 is a
+ve value.
• If the lid margin is below the corneal reflex in cases of
very severe ptosis the MRD 1 would be a –ve value.
24.
25. 2). VERTICAL FISSURE HEIGHT
The distance between the upper and lower eyelid in vertical
alignment with the center of the pupil in primary gaze, with the
patient’s brow relaxed.
Normal – 9-10mm in primary gaze
Should be seen in up gaze, down gaze and primary gaze
Amount of ptosis = difference in palpebral apertures in unilateral
ptosis or Difference from normal in bilateral ptosis
26. 3). LEVATOR FUNCTION ASSESSMENT
It is determined by the lid excursion caused by LPS muscle
(Burke’s method).
Patient is asked to look down and thumb of one hand is placed
firmly against the eyebrow of the patient (to block the action of
frontalis muscle) by the examiner.
Then the patient is asked to look up and the amount of upper lid
excursion is measured with a ruler held in the other hand by the
examiner.
Levator function is graded as follows:
Normal 15 mm
Good 8 mm or more
Fair 5-7 mm
Poor 4 mm or less
32. LEVATOR RESECTION
Indicated for any ptosis provided levator function is at least 5mm.
Contraindicated in patients having severe ptosis with poor
levator function.
33. FRONTALIS BROW SUSPENSION
Used in severe ptosis with poor levator function (4 mm or less).
The tarsal plate is suspended from the frontalis muscle with a
sling consisting of autologous fascia lata or non absorbable
material such as prolene or silicon.
Marcus Gunn jaw-winking syndrome