This document discusses various antifibrotic agents used in ophthalmology, including 5-fluorouracil, mitomycin C, and amniotic membrane. 5-fluorouracil inhibits DNA synthesis to reduce fibroblast proliferation and is used after glaucoma surgery and for ocular surface tumors. Mitomycin C inhibits cell proliferation and is applied during pterygium removal and glaucoma surgery to prevent scarring. Amniotic membrane promotes wound healing and inhibits scarring. It is used for ocular surface reconstruction after injuries or surgery.
Fungal infections of eye cause one of the most dangerious infections. Accurate diagnosis and proper institution of anti-fungal therapy is essential. Here we discuss the various anti-fungal agents available to be used in ophthalmology.
Since de Wecker first described the “filtering cicatrix”, as a surgical treatment for glaucoma in 1882
Glaucoma filtering surgery (GFS) differs from most surgical procedures in that inhibition of wound healing is desirable to achieve surgical success
Fungal infections of eye cause one of the most dangerious infections. Accurate diagnosis and proper institution of anti-fungal therapy is essential. Here we discuss the various anti-fungal agents available to be used in ophthalmology.
Since de Wecker first described the “filtering cicatrix”, as a surgical treatment for glaucoma in 1882
Glaucoma filtering surgery (GFS) differs from most surgical procedures in that inhibition of wound healing is desirable to achieve surgical success
Microneedling, A brief review by Dr. Mohammad Baghaei Mohammad Baghaei
Microneedling is a physical method that induces modification in the SC mechanically and produces micron-sized channels or pores in the skin. This characteristic of the microneedling technique provides delivery of various molecules or therapeutic substances, including proteins, which would usually not penetrate ...
this slide share admixed with pictures and animations will give an overall idea of immunological disorders of cornea. it covers anatomy immunology, and pharmacology as well
micro teaching on communication m.sc nursing.pdfAnurag Sharma
Microteaching is a unique model of practice teaching. It is a viable instrument for the. desired change in the teaching behavior or the behavior potential which, in specified types of real. classroom situations, tends to facilitate the achievement of specified types of objectives.
Title: Sense of Taste
Presenter: Dr. Faiza, Assistant Professor of Physiology
Qualifications:
MBBS (Best Graduate, AIMC Lahore)
FCPS Physiology
ICMT, CHPE, DHPE (STMU)
MPH (GC University, Faisalabad)
MBA (Virtual University of Pakistan)
Learning Objectives:
Describe the structure and function of taste buds.
Describe the relationship between the taste threshold and taste index of common substances.
Explain the chemical basis and signal transduction of taste perception for each type of primary taste sensation.
Recognize different abnormalities of taste perception and their causes.
Key Topics:
Significance of Taste Sensation:
Differentiation between pleasant and harmful food
Influence on behavior
Selection of food based on metabolic needs
Receptors of Taste:
Taste buds on the tongue
Influence of sense of smell, texture of food, and pain stimulation (e.g., by pepper)
Primary and Secondary Taste Sensations:
Primary taste sensations: Sweet, Sour, Salty, Bitter, Umami
Chemical basis and signal transduction mechanisms for each taste
Taste Threshold and Index:
Taste threshold values for Sweet (sucrose), Salty (NaCl), Sour (HCl), and Bitter (Quinine)
Taste index relationship: Inversely proportional to taste threshold
Taste Blindness:
Inability to taste certain substances, particularly thiourea compounds
Example: Phenylthiocarbamide
Structure and Function of Taste Buds:
Composition: Epithelial cells, Sustentacular/Supporting cells, Taste cells, Basal cells
Features: Taste pores, Taste hairs/microvilli, and Taste nerve fibers
Location of Taste Buds:
Found in papillae of the tongue (Fungiform, Circumvallate, Foliate)
Also present on the palate, tonsillar pillars, epiglottis, and proximal esophagus
Mechanism of Taste Stimulation:
Interaction of taste substances with receptors on microvilli
Signal transduction pathways for Umami, Sweet, Bitter, Sour, and Salty tastes
Taste Sensitivity and Adaptation:
Decrease in sensitivity with age
Rapid adaptation of taste sensation
Role of Saliva in Taste:
Dissolution of tastants to reach receptors
Washing away the stimulus
Taste Preferences and Aversions:
Mechanisms behind taste preference and aversion
Influence of receptors and neural pathways
Impact of Sensory Nerve Damage:
Degeneration of taste buds if the sensory nerve fiber is cut
Abnormalities of Taste Detection:
Conditions: Ageusia, Hypogeusia, Dysgeusia (parageusia)
Causes: Nerve damage, neurological disorders, infections, poor oral hygiene, adverse drug effects, deficiencies, aging, tobacco use, altered neurotransmitter levels
Neurotransmitters and Taste Threshold:
Effects of serotonin (5-HT) and norepinephrine (NE) on taste sensitivity
Supertasters:
25% of the population with heightened sensitivity to taste, especially bitterness
Increased number of fungiform papillae
These simplified slides by Dr. Sidra Arshad present an overview of the non-respiratory functions of the respiratory tract.
Learning objectives:
1. Enlist the non-respiratory functions of the respiratory tract
2. Briefly explain how these functions are carried out
3. Discuss the significance of dead space
4. Differentiate between minute ventilation and alveolar ventilation
5. Describe the cough and sneeze reflexes
Study Resources:
1. Chapter 39, Guyton and Hall Textbook of Medical Physiology, 14th edition
2. Chapter 34, Ganong’s Review of Medical Physiology, 26th edition
3. Chapter 17, Human Physiology by Lauralee Sherwood, 9th edition
4. Non-respiratory functions of the lungs https://academic.oup.com/bjaed/article/13/3/98/278874
New Drug Discovery and Development .....NEHA GUPTA
The "New Drug Discovery and Development" process involves the identification, design, testing, and manufacturing of novel pharmaceutical compounds with the aim of introducing new and improved treatments for various medical conditions. This comprehensive endeavor encompasses various stages, including target identification, preclinical studies, clinical trials, regulatory approval, and post-market surveillance. It involves multidisciplinary collaboration among scientists, researchers, clinicians, regulatory experts, and pharmaceutical companies to bring innovative therapies to market and address unmet medical needs.
Recomendações da OMS sobre cuidados maternos e neonatais para uma experiência pós-natal positiva.
Em consonância com os ODS – Objetivos do Desenvolvimento Sustentável e a Estratégia Global para a Saúde das Mulheres, Crianças e Adolescentes, e aplicando uma abordagem baseada nos direitos humanos, os esforços de cuidados pós-natais devem expandir-se para além da cobertura e da simples sobrevivência, de modo a incluir cuidados de qualidade.
Estas diretrizes visam melhorar a qualidade dos cuidados pós-natais essenciais e de rotina prestados às mulheres e aos recém-nascidos, com o objetivo final de melhorar a saúde e o bem-estar materno e neonatal.
Uma “experiência pós-natal positiva” é um resultado importante para todas as mulheres que dão à luz e para os seus recém-nascidos, estabelecendo as bases para a melhoria da saúde e do bem-estar a curto e longo prazo. Uma experiência pós-natal positiva é definida como aquela em que as mulheres, pessoas que gestam, os recém-nascidos, os casais, os pais, os cuidadores e as famílias recebem informação consistente, garantia e apoio de profissionais de saúde motivados; e onde um sistema de saúde flexível e com recursos reconheça as necessidades das mulheres e dos bebês e respeite o seu contexto cultural.
Estas diretrizes consolidadas apresentam algumas recomendações novas e já bem fundamentadas sobre cuidados pós-natais de rotina para mulheres e neonatos que recebem cuidados no pós-parto em unidades de saúde ou na comunidade, independentemente dos recursos disponíveis.
É fornecido um conjunto abrangente de recomendações para cuidados durante o período puerperal, com ênfase nos cuidados essenciais que todas as mulheres e recém-nascidos devem receber, e com a devida atenção à qualidade dos cuidados; isto é, a entrega e a experiência do cuidado recebido. Estas diretrizes atualizam e ampliam as recomendações da OMS de 2014 sobre cuidados pós-natais da mãe e do recém-nascido e complementam as atuais diretrizes da OMS sobre a gestão de complicações pós-natais.
O estabelecimento da amamentação e o manejo das principais intercorrências é contemplada.
Recomendamos muito.
Vamos discutir essas recomendações no nosso curso de pós-graduação em Aleitamento no Instituto Ciclos.
Esta publicação só está disponível em inglês até o momento.
Prof. Marcus Renato de Carvalho
www.agostodourado.com
TEST BANK for Operations Management, 14th Edition by William J. Stevenson, Ve...kevinkariuki227
TEST BANK for Operations Management, 14th Edition by William J. Stevenson, Verified Chapters 1 - 19, Complete Newest Version.pdf
TEST BANK for Operations Management, 14th Edition by William J. Stevenson, Verified Chapters 1 - 19, Complete Newest Version.pdf
- Video recording of this lecture in English language: https://youtu.be/lK81BzxMqdo
- Video recording of this lecture in Arabic language: https://youtu.be/Ve4P0COk9OI
- Link to download the book free: https://nephrotube.blogspot.com/p/nephrotube-nephrology-books.html
- Link to NephroTube website: www.NephroTube.com
- Link to NephroTube social media accounts: https://nephrotube.blogspot.com/p/join-nephrotube-on-social-media.html
Ozempic: Preoperative Management of Patients on GLP-1 Receptor Agonists Saeid Safari
Preoperative Management of Patients on GLP-1 Receptor Agonists like Ozempic and Semiglutide
ASA GUIDELINE
NYSORA Guideline
2 Case Reports of Gastric Ultrasound
Title: Sense of Smell
Presenter: Dr. Faiza, Assistant Professor of Physiology
Qualifications:
MBBS (Best Graduate, AIMC Lahore)
FCPS Physiology
ICMT, CHPE, DHPE (STMU)
MPH (GC University, Faisalabad)
MBA (Virtual University of Pakistan)
Learning Objectives:
Describe the primary categories of smells and the concept of odor blindness.
Explain the structure and location of the olfactory membrane and mucosa, including the types and roles of cells involved in olfaction.
Describe the pathway and mechanisms of olfactory signal transmission from the olfactory receptors to the brain.
Illustrate the biochemical cascade triggered by odorant binding to olfactory receptors, including the role of G-proteins and second messengers in generating an action potential.
Identify different types of olfactory disorders such as anosmia, hyposmia, hyperosmia, and dysosmia, including their potential causes.
Key Topics:
Olfactory Genes:
3% of the human genome accounts for olfactory genes.
400 genes for odorant receptors.
Olfactory Membrane:
Located in the superior part of the nasal cavity.
Medially: Folds downward along the superior septum.
Laterally: Folds over the superior turbinate and upper surface of the middle turbinate.
Total surface area: 5-10 square centimeters.
Olfactory Mucosa:
Olfactory Cells: Bipolar nerve cells derived from the CNS (100 million), with 4-25 olfactory cilia per cell.
Sustentacular Cells: Produce mucus and maintain ionic and molecular environment.
Basal Cells: Replace worn-out olfactory cells with an average lifespan of 1-2 months.
Bowman’s Gland: Secretes mucus.
Stimulation of Olfactory Cells:
Odorant dissolves in mucus and attaches to receptors on olfactory cilia.
Involves a cascade effect through G-proteins and second messengers, leading to depolarization and action potential generation in the olfactory nerve.
Quality of a Good Odorant:
Small (3-20 Carbon atoms), volatile, water-soluble, and lipid-soluble.
Facilitated by odorant-binding proteins in mucus.
Membrane Potential and Action Potential:
Resting membrane potential: -55mV.
Action potential frequency in the olfactory nerve increases with odorant strength.
Adaptation Towards the Sense of Smell:
Rapid adaptation within the first second, with further slow adaptation.
Psychological adaptation greater than receptor adaptation, involving feedback inhibition from the central nervous system.
Primary Sensations of Smell:
Camphoraceous, Musky, Floral, Pepperminty, Ethereal, Pungent, Putrid.
Odor Detection Threshold:
Examples: Hydrogen sulfide (0.0005 ppm), Methyl-mercaptan (0.002 ppm).
Some toxic substances are odorless at lethal concentrations.
Characteristics of Smell:
Odor blindness for single substances due to lack of appropriate receptor protein.
Behavioral and emotional influences of smell.
Transmission of Olfactory Signals:
From olfactory cells to glomeruli in the olfactory bulb, involving lateral inhibition.
Primitive, less old, and new olfactory systems with different path
Flu Vaccine Alert in Bangalore Karnatakaaddon Scans
As flu season approaches, health officials in Bangalore, Karnataka, are urging residents to get their flu vaccinations. The seasonal flu, while common, can lead to severe health complications, particularly for vulnerable populations such as young children, the elderly, and those with underlying health conditions.
Dr. Vidisha Kumari, a leading epidemiologist in Bangalore, emphasizes the importance of getting vaccinated. "The flu vaccine is our best defense against the influenza virus. It not only protects individuals but also helps prevent the spread of the virus in our communities," he says.
This year, the flu season is expected to coincide with a potential increase in other respiratory illnesses. The Karnataka Health Department has launched an awareness campaign highlighting the significance of flu vaccinations. They have set up multiple vaccination centers across Bangalore, making it convenient for residents to receive their shots.
To encourage widespread vaccination, the government is also collaborating with local schools, workplaces, and community centers to facilitate vaccination drives. Special attention is being given to ensuring that the vaccine is accessible to all, including marginalized communities who may have limited access to healthcare.
Residents are reminded that the flu vaccine is safe and effective. Common side effects are mild and may include soreness at the injection site, mild fever, or muscle aches. These side effects are generally short-lived and far less severe than the flu itself.
Healthcare providers are also stressing the importance of continuing COVID-19 precautions. Wearing masks, practicing good hand hygiene, and maintaining social distancing are still crucial, especially in crowded places.
Protect yourself and your loved ones by getting vaccinated. Together, we can help keep Bangalore healthy and safe this flu season. For more information on vaccination centers and schedules, residents can visit the Karnataka Health Department’s official website or follow their social media pages.
Stay informed, stay safe, and get your flu shot today!
Basavarajeeyam is a Sreshta Sangraha grantha (Compiled book ), written by Neelkanta kotturu Basavaraja Virachita. It contains 25 Prakaranas, First 24 Chapters related to Rogas& 25th to Rasadravyas.
2. ANTIFIBROTIC AGENTS
A drug that inhibits or reduces fibrosis .
Types of antifibrotic agents
5-Fluorouracil
Mitomycin C
Amniotic membrane
Other Antifibrotics Agents
3. 5-FLUROURACIL
It is pyrimidine analogue antimetabolite, which
blocks DNA synthesis through the inhibition of
thymidylate synthesis , has been shown to inhibit
fibroblast proliferation in cell culture.
4. USES
5-FU to reduce fibroblastic proliferation and
subsequent scarring has made it an important
adjunct in ocular and periorbital surgeries.
It is used in primary glaucoma filtering surgeries
and in reviving failing filtering blebs, in
dacryocystorhinostomy, pterygium surgery, and in
vitreoretinal surgery to prevent proliferative
vitreoretinopathy.
5. 5-FU is also gaining recognition in the treatment
and surgical management of ocular surface
malignancies like ocular surface squamous
neoplasia; however, the specific action of the drug
on highly proliferating cells limits its use in primary
acquired melanosis of the conjunctiva.
It an important tool in enhancing the success rate
in ophthalmic surgery and in reducing the
recurrence of ocular surface neoplasia.
Dose:-5mg for 7-14 days twice-daily subconjuctival
injection.
6. CONTRAINDICATIONS
It is contraindicated in patients that are severely
debilitated or in patients with bone marrow
suppression due to either radiotherapy or
chemotherapy.
It is likewise contraindicated in pregnant or
breastfeeding women.
7. ADVERSE EFFECTS
Common (> 1% frequency)
Local pain
Itching
Burning
Stinging
Crusting
Photosenstivity
9. MITOMYCIN-C
Mitomycin-C (MMC) is an anti-neoplastic/ antibiotic
agent isolated from soil bacterium Streptomyces
caespitosus.
MMC was first used in ophthalmology in 1969 in
Japan, where recurrent pterygium were
successfully treated with the drug.
It is used intravenously to treat upper gastro-
intestinal tumors, anal cancer, breast cancer and
bladder tumors.
10. In eye surgery, it is applied topically to prevent
recurrence in pterygium surgery, to prevent scarring
during glaucoma filtering surgery and haze after
Photorefractive keratectomy (PRK) or LASIK.
Its use and application in ophthalmology has been
increasing in recent years because of its
modulatory effects on wound healing.
11. MECHANISM OF ACTION
It is an anti-metabolite with anti-proliferative effect
on cells showing the highest rate of mitosis by
inhibiting DNA synthesis and interferes with RNA
transcription and protein synthesis.
The cell cycle is most affected during the late G-I
and early S-phase.
12. CLINICAL USES OF MITOMYCIN C IN
OPHTHALMOLOGY
Pterygium surgery
Glaucoma filtering surgery
Refractive surgeries
Ocular surface tumors
Squint surgeries
Dacryocystorhinostomy (DCR)
Allergic conjunctivitis.
13. PTERYGIUM SURGERY
The pterygium is a horizontally oriented, triangular
growth of subconjunctival tissue that invades the
cornea.
Dose: 0.2-0.4 mg/ml applied intra-operatively over
bare sclera for 1-5 minutes.
Most impressive results with pterygium were
double masked, prospective trial using doses of
0.4mg/ml (0.04%) and 1mg/ml four times daily for
two weeks; they showed a recurrence rate of 2.2%
compared with the placebo rate of 88.9% after 5
months of follow up .
14. A detailed report of 10 cases with serious, vision-
threatening complications associated with
Mitomycin-C use after pterygium surgery has been
published when a concentration of 0.4% was used
post-operatively for up to 3 weeks .
Secondary glaucoma
Corneal melting
Corneal perforation
Scleral calcification
15. OTHER COMPLICATIONS OF MMC IN
PTERYGIUM SURGERY INCLUDE
Pain
Excessive tearing
Photophobia
Prolonged hyperemia
Chemosis
Lid edema
Wound dehiscence
Corneal blood staining
Pigment accumulation
Superficial punctate keratitis and delayed wound
healing
16. GLAUCOMA FILTERING SURGERY
The high failure rate of trabeculectomy surgery is
partly due to subconjunctival or scleral scarring at
bleb.
MMC inhibits the fibroblasts proliferation and
subsequent scarring of filtration bleb.
Intraoperative MMC applied at concentration of
0.2mg/ml controlled post-operative intra-ocular
pressure (IOP) as effectively as a 0.4mg/ml
concentration in high risk cases of congenital
glaucoma, but with lower incidence of complications
and thin walled blebs .
17. No significant difference was seen in overall
success or complication between subconjunctival
and intra-scleral application of MMC augmented
trabeculectomies in glaucomatous eyes at high risk
of surgical failure .
In selected pediatric cases of primary or secondary
glaucoma in which visualization of the trabecular
meshwork is poor trabeculectomy augmented with
MMC and 5-FU is a good treatment option.
18. Dose: 0.2-0.4mg/ml
Complications: Development of thin walled cystic
blebs, late bleb leaks, bleb infections,
endophthalmitis, chronic hypotony, hypotonic
maculopathy and corneal epithelial toxicity.
19. REFRACTIVE SURGERIES
Haze formation with loss of corneal transparency
and surface irregularities and myopic regression
are the major complications after corneal refractive
surface surgery.
The use of Mitomycin-C with its antibiotic and anti-
neoplastic properties is intended to inhibit wound
healing mechanisms leading to sub-epithelial
fibrosis.
Dose:- 0.2mg/ml (0.02%) for 12 to 120 seconds
Single application of diluted MMC 0.02% solution
following scraping of the corneal surface was
effective and safe in treating haze and regression
after PRK for myopia .
20. OCULAR SURFACE TUMORS
Ocular surface tumors include a variety of
neoplasms originating from squamous epithelium,
melanocytes, and lymphocytic resident cells of the
conjunctival stroma.
MMC selectively inhibits DNA synthesis.
Topical MMC can treat satellite and multifocal
lesions and the entire ocular surface.
It has been used successfully as adjunctive therapy
for controlling conjunctival and corneal squamous
cell carcinoma even in extensive recurrent disease
21. SQUINT SURGERIES
Topical Mitomycin-C may enhance the success rate
of strabismus surgery with delayed adjustment and
reduce post-operative adhesions.
Intra-operative application of MMC is reported in
cases of restrictive squints. It helps to reduce
fibrosis and scarring under the tenons layer.
Dose: 0.2mg/ml for 5 minutes between the
conjunctiva and the sclera after adhesion release.
22. DACRYOCYSTORTHINOSTOMY
The most important cause of failure of DCR surgery
is fibrosis occurring under the flaps near the
osteotomy sites.
MMC in these cases tends to suppress fibrous
proliferation and scar formation intra-operatively.
MMC application is effective in increasing the
success rate of DCR surgery and no significant
complications resulted from its use.
23. A piece of cotton soaked with 0.2mg/ml MMC is
applied to the osteotomy site for 30 minutes intra-
operatively is effective in maintaining a larger
osteotomy size and also improves success rates
over the traditional DCR procedure.
Dose: 0.02 to 0.04% for 5-30 minutes.
Allergic conjunctivitis :In a study topical MMC
(0.2mg/10ml) was applied four times a day for 3
months and was found to be safe and effective
alternative to topical azelastine, in treating allergic
conjunctivitis.
24. OCULAR COMPLICATIONS OF
TOPICAL MITOMYCIN C
Minor complications like ocular pain, photophobia,
lacrimation, lid edema, foreign body sensation
(secondary to superficial punctate keratitis).
Major complications are rare include scleral
ulceration, necrotizing scleritis, perforation, uveitis,
cataract, glaucoma and symblepharon formation.
25. WHEN TO USE 5-FU VS MMC?
For most primary trabeculectomies, those patients
at minimal risk of failure, we prefer 5-FU. We apply
it intraoperatively with administration of 5-FU
injections postoperatively as needed, depending on
the postoperative course.
We use MMC for eyes at higher risk of bleb failure.
This includes patients who have undergone
previous ocular surgery, those with uveitic and
neovascular glaucoma, and young patients.
26. We use 5-FU postoperatively when there is
significant focal inflammation around the bleb that
persists. We administer the drug as a 5 mg dose in
0.1 cc subconjunctivally.
Unlike mitomycin C, the risk of toxicity is low with
intracameral exposure of low doses of 5-FU. Thus,
the injection can be performed adjacent to the bleb
in many instances.
27. AMNIOTIC MEMBRANE
Amniotic membrane is the innermost layer of the
placenta consisting of a thick
basement membrane and an avascular stromal
matrix. It can been used as a graft and as a
dressing to facilitate ocular surface reconstruction
and to promote healing.
Amniotic membrane enhance growth and
differentiation of conjunctival epithelial cells and is
reported to inhibit subconjunctival scar tissue
formation.
Amniotic membrane is considered to be a favorable
substrate for ocular surface reconstruction.
28. CHARACTERISTICS OF AMNIOTIC
MEMBRANE
Amniotic membrane is the inner membrane of the
fetal membrane .
It consists of a thick continuous basement
membrane and an avascular stromal matrix that
contain a high concentration of basic fibroblast
growth factor , basement membrane components
and several trophic factor .
Recent advances indicates AM has anti-
inflammatory, anti-proteolytic and antimicrobial
activity.
29. INDICATIONS OF AMNIOTIC
MEMBRANE TRANSPLANTATION
AMT in the presence of stem cell deficiency
-Ocular chemical injury
AMT in the absence of stem cell deficiency
-Corneal epithelial defects
-Corneal / corneoscleral ulcers
-Bullous keratopathy
AMT for conjunctival reconstruction
-Pterygium
-OSSN
-Limbal dermoid
-Symblepharon
30. -Conjunctival lesions
-Leaking blebs
AMT in ocular cicatricial diseases
-Toxic epidermal necrolysis
-Ocular cicatricial pemphigoid
-Oculopalpebral and reconstructive surgery
Other indications of AM use
-Stem cell cultures