23 results
Polyuria - Differential Diagnosis Algorithm
Polyuria = >3L Urine output / 24 hours
Urine osmolality = 2 (Na
Diagnosis Algorithm ... Polyuria = >3L ... nutrition), Azotemia LOW ... Differential #Diagnosis #Algorithm ... #nephrology
Polyuria - Differential Diagnosis Algorithm
Urine Output > 3L /day
Water Diuresis (Urine Osm <100 mOsm/kg)
 • Primary
Polyuria - Differential ... Diagnosis Algorithm ... solute load #Polyuria ... Differential #Diagnosis #Algorithm ... #causes #nephrology
Causes of Polyuria - Differential Diagnosis Algorithm
Polyuria - Urine Output > 3L/day, Increased Urine Volume (>2ml/min)
Osmotic
Causes of Polyuria ... Differential Diagnosis Algorithm ... Polyuria - Urine ... #Nephrology #Differential ... #Diagnosis #Algorithm
Causes of Hypernatremia - Differential Diagnosis Algorithm
Hypernatremia - Excess free water loss, Serum Sodium >145 mmol/L
High
145 mmol/L High Urine ... diuresis (see Polyuria ... mannitol, glucosuria Low ... Urine Osmolality ... Hypernatremia #Nephrology
Causes of Polyuria - Differential Diagnosis
Excess Intake of Water:
 • Primary polydipsia (a.k.a. "psychogenic polydipsia")
 •
Causes of Polyuria ... • Central Dl (Low ... Mimics (↑ urine ... frequency without ↑ urine ... Diagnosis #Causes #nephrology
True Hyponatremia Differential Algorithm

Instead (or in addition) of volume status examination, check urine sodium and serum
Hyponatremia Differential Algorithm ... sodium low, uric ... and uric acid low ... #Differential #Algorithm ... #Diagnosis #Nephrology
Hyponatremia Differential Diagnosis Algorithm - Utilizing Uric Acid 
ADH promotes Urea/uric acid excretion along with water
Osmolarity 2) Urine ... Osmolarity 3) Urine ... Uric Acid - Low ... #nephrology #sodium ... #low #uricacid
Primary Metabolic Alkalosis - Differential Diagnosis Algorithm
Volume Depleted 2° hyperaldosteronism
 • Low Urine Cl-: Vomiting, NGT
Differential Diagnosis Algorithm ... Urine Cl-: Vomiting ... (late) • High Urine ... Differential #Diagnosis #Algorithm ... #nephrology
Primary Metabolic Alkalosis - Differential Diagnosis Algorithm
Volume Depleted - 2° hyperaldosteronism
 • Low Urine Cl-: Vomiting,
Differential Diagnosis Algorithm ... Urine Cl-: Vomiting ... (late) • High Urine ... Differential #Diagnosis #Algorithm ... #Nephrology #Causes
Volume Based Approach to Hyponatremia
Hypovolemic, Serum uric acid >4
 • Urine Na <20: Extra-renal losses
 •
uric acid >4 • Urine ... Hypothyroidism, Low ... #Hyponatremia #algorithm ... diagnosis #sodium #low ... #nephrology