13 results
Type IV Hypersensitivity: Pathogenesis and clinical findings
Definition: Unique because it is entirely T-Cell mediated; exposure to
causes development ... Particular CD4+ Th cells ... harmful -> Th Cells ... macrophages, mast cells ... #Immunology #pathophysiology
Hypersensitivity Types and Their Mechanisms
Type I - lgE - Soluble antigen
 - Allergen-specific lgE antibodies bind
Soluble antigen - Allergen-specific ... When the specific allergen ... Hypersensitivity #Types #Classification ... #Pathophysiology ... #Allergy #Diagnosis
Bell's Phenomenon on Physical Exam

Carles Bell realized that when trying to close the eye on the
Bell's Phenomenon ... Physical Exam Carles ... neurologiabr #Bells ... Sign #clinical #video ... #PhysicalExam #ophthalmology
Summary table of types of hypersensitivity reactions. 
Type 1
 - Mediators: lgE
 - Antigen Form: Soluble
Mechanism of Action: Allergen-specific ... lgE causes mast-cell ... T-cells recruit ... reactions #types #allergy ... #table #classification
Persistent Pupillary Membrane (PPM) on Slit Lamp Ocular Examination

This membrane would be a remainder of the
tunica vasculosa lentis ... large enough to cause ... PhysicalExam #clinical #video ... #ophthalmology
Antiarrhythmics - Vaughan Williams Classification:
CLASS 1 - Sodium Channel Blockers:
 • MOA: Block fast Na+ channels
Vaughan Williams Classification ... ++ influx into cells ... #Pharmacology #Classification ... #Classes #pathophysiology
Antiarrhythmics Pharmacology Summary
Cardiac Conduction Phases:
Phase 0 - Ventricular Depolarization:
 • Na+ channels open leading to a
increases out of cells ... Vaughan Williams Classification ... ++ influx into cells ... #Pharmacology #Classification ... #Classes #pathophysiology
Central Retinal Artery Occlusion: Pathogenesis and clinical findings
 • Inflammatory Disease: (i.e. GCA, SLE, GPA) ->
retinal edema caused ... Retina • Ganglion cells ... Occlusion #CRAO #pathophysiology ... #ophthalmology
Persistent Pupillary Membrane (PPM) on Physical Exam

PPM is a congenital anomaly caused by incomplete regression of
congenital anomaly caused ... tunica vasculosa lentis ... ocular #clinical #video ... #ophthalmology
Aqueous Humor Production and Drainage
 • Provides nutrition, removes wastes, and transports neurotransmitters to the avascular
Circulates inflammatory cells ... of flow) -> AH passes ... suprachoroidal space -> Passes ... Drainage #flow #Pathophysiology ... #ophthalmology