33 results
Polyuria - Differential Diagnosis Algorithm
Urine Output > 3L /day
Water Diuresis (Urine Osm <100 mOsm/kg)
 • Primary
Polyuria - Differential ... Diagnosis Algorithm ... Relief of prolonged urinary ... #Differential # ... Diagnosis #Algorithm
Causes of Hypokalemia - Differential Diagnosis Algorithm
Defining the cause of hypokalemia starts by measuring urinary K
- Differential ... Diagnosis Algorithm ... starts by measuring urinary ... Clinicians should also look ... Post-hypercapnia • Diuretics
Causes of Hypokalemia
Transcellular Shifts:
 - Alkalosis, Increased plasma insulin (treatment of diabetic ketoacidosis), ß-Adrenergic agonists, Hypokalemic
Causes of Hypokalemia ... plasma insulin (treatment ... anhydrase inhibitors, loop ... syndrome (mimics loop ... #Causes #differential
Causes of Polyuria - Differential Diagnosis
Excess Intake of Water:
 • Primary polydipsia (a.k.a. "psychogenic polydipsia")
 •
- Differential ... of Water: • Primary ... a.k.a. osmotic diuresis ... Hereditary, Lithium, Hypercalcemia ... #Differential #
Increased Urinary Frequency - Differential Diagnosis Algorithm
Non-increased urine volume (<2mL/min), Rule out polyuria
Extrinsic to Urinary Tract:
Frequency - Differential ... Diagnosis Algorithm ... min), Rule out polyuria ... Irritant drugs: Diuretics ... #Diagnosis #Algorithm
Increased Urination - Differential Diagnosis Framework - Increased Volume / Frequency
 • Increased osmotic load (Increased
Increased Urination - Differential ... kidney disease, Loop ... phase of ATN, Hypercalcemia ... /Inflammation: Urinary ... Increased #Urination #Differential
Hypomagnesemia - Etiologies by Mechanism

Decreased GI Uptake 
 - Poor dietary intake (particularly common in alcoholics)
inhibitors - Primary ... Medications - Loop ... abnormalities - Hypercalcemia ... - Hypokalemia ... Hypomagnesemia #Differential
Hypokalemia - Differential Diagnosis
Poor Intake 
 - Starvation
 - Anorexia
GI Losses 
 - Vomiting / NG
Hypokalemia - Differential ... Ureterosigmoidostomy Urinary ... Losses - Diuretics ... Amphotericin B - Polyuria ... #Differential #
Polyuria - Differential Diagnosis Algorithm
Polyuria = >3L Urine output / 24 hours
Urine osmolality = 2 (Na
Polyuria - Differential ... Diagnosis Algorithm ... mosm/kg • Solute Diuresis ... Diabetes Insipidus • Primary ... #Differential #
Hypokalemia - Differential Diagnosis Algorithm
Extra-renal Losses:
 • Normal Acid-Base: Low intake
 • Metabolic acidosis: Gl tract
Hypokalemia - Differential ... Diagnosis Algorithm ... secreting tumor, Primary ... • HTN Absent: Loop ... and thiazide diuretics