12 results
Polyuria - Differential Diagnosis Algorithm
Urine Output > 3L /day
Water Diuresis (Urine Osm <100 mOsm/kg)
 • Primary
Polyuria - Differential ... Diagnosis Algorithm ... Polydipsia • Central ... Dl • Chronic Renal ... #causes #nephrology
Causes of Polyuria - Differential Diagnosis Algorithm
Polyuria - Urine Output > 3L/day, Increased Urine Volume (>2ml/min)
Osmotic
Polyuria - Urine ... Osmolality > Serum ... Recovery from Acute Renal ... response • Central ... #Nephrology #Differential
Causes of Polyuria - Differential Diagnosis
Excess Intake of Water:
 • Primary polydipsia (a.k.a. "psychogenic polydipsia")
 •
Insipidus): • Central ... Dl (Low production ... Nephrogenic DI (Renal ... Mimics (↑ urine ... Diagnosis #Causes #nephrology
Hyponatremia Differential Diagnosis Algorithm - Utilizing Uric Acid 
ADH promotes Urea/uric acid excretion along with water
Sodium 4) Serum ... Uric Acid - Low ... High Uric Acid → renal ... #nephrology #sodium ... #low #uricacid
Volume Based Approach to Hyponatremia
Hypovolemic, Serum uric acid >4
 • Urine Na <20: Extra-renal losses
 •
Hypothyroidism, Low ... Hypervolemic, Serum ... #Hyponatremia #algorithm ... diagnosis #sodium #low ... #nephrology
Causes of Hypernatremia - Differential Diagnosis Algorithm
Hypernatremia - Excess free water loss, Serum Sodium >145 mmol/L
High
free water loss, Serum ... diuresis (see Polyuria ... mannitol, glucosuria Low ... Urine Osmolality ... Hypernatremia #Nephrology
Approach to Hypomagnesemia 

Fractional excretion of magnesium = (urine magnesium x serum creatinine)/ [0.7 (serum magnesium
magnesium x serum ... magnesium x urine ... Hypomagnesemia #algorithm ... diagnosis #causes #nephrology ... #magnesium #low
Acute Kidney Injury - AKI Workup Algorithm and Differential Diagnosis
Baseline Investigations: full blood count with differential,
Injury - AKI Workup Algorithm ... ultrasonography, serum ... investigations depending on clinical ... #AKI #Workup #Algorithm ... Differential #Diagnosis #nephrology
Age Related Macular Degeneration: Pathogenesis and clinical findings

Photoreceptor atrophy 
-> Extracellular debris (drusen) from RPE atrophy/metabolism
Pathogenesis and clinical ... reduces blood flow ... blood vessels leak serous ... - Distorted central ... blind spots in central
Hypernatremia - Differential Diagnosis Workup Algorithm

1) Check Urine Osmolality:
 > 600 mOsm/kg - Implies extrarenal mechanism
Diagnosis Workup Algorithm ... 1) Check Urine ... • Euvolemic (Low ... Diabetes insipidus (central ... #nephrology #sodium