11 results
Argyll-Robertson Pupil on Physical Exam
Small (myotic), irregular pupil that do not react to light but do
Argyll-Robertson ... Physical Exam Small (myotic ... Medicalknowled1 #Argyll ... clinical #video #neurology
Argyll Robertson Pupil
Definition:
 - Irregular and small (1-2mm) pupil
 - Light-near dissociation (accommodation remains intact)
 -
Argyll Robertson ... intact) - Usually bilateral ... @neudrawlogy #Argyll ... Robertson #Pupil #neurology
Visual Pathway Neural Lesions
A) Optic Nerve → Left Anopia
B) Optic Chiasm → Bitemporal Hemianopia
C) Lateral Geniculate
Optic Nerve → Left Anopia ... Hemianopia C) Lateral ... ophthalmology #neurology
Floaters - Differential Diagnosis Framework

What?
Vitreous Floaters:
• Microscopic collagen fibers within the vitreous that tend to clump
shadows on the retina ... suggestive of retinal ... floaters: • Myopia ... colored lights, bilateral ... hypotension - bilateral
Acute Kidney Injury (AKI) - Differential Diagnosis Framework

PRE-Renal AKI:
 • Hypovolemia
 • Congestion
 • Medications
 •
Framework PRE-Renal ... Shunting INTRA-Renal ... Drug-induced POST-Renal ... Neurogenic bladder • Bilateral ... Differential #Diagnosis #nephrology
Marcus Gunn Pupil - Relative Afferent Pupillary Defect (RAPD)
Definition: Afferent loop of the pupillary light reflex
(main cause), Retina ... Later (1959), Levitan ... #Defect #RAPD #neurology
Photophobia and Headache - Differential Diagnosis Framework

Why?
• The coexistence of photophobia and headache suggests the potential
pathways occur at the retina ... activation of retina-driven ... photophobia - Bilateral ... headache: - Bilateral ... ophthalmology #Neurology
Secondary Causes of Hypertension - Differential Diagnosis Algorithm
Hypertension - BP > 140/90 (>130/80 for DM)
Hypertensive urgency
multi-drug resistance) Renal ... Liddle's syndrome • Bilateral ... HTN #Secondary #Nephrology
Causes of Metabolic Alkalosis: Differential Diagnosis
ECF volume contracted: urine chloride concentration <20 meq/L
 • Gastric alkalosis:
diuretics after renal ... unilateral adenoma/ bilateral ... generally indicates a renal ... Diagnosis #Causes #nephrology
Renal Biopsy - Absolute and Relative Contraindications
WHEN NOT TO DO IT:
 • Isolated glomerular hematuria, unless
Renal Biopsy - Absolute ... • Multiple, bilateral ... BrighamChiefs #Renal ... Contraindications #management #nephrology