16 results
Causes of Polyuria - Differential Diagnosis Algorithm
Polyuria - Urine Output > 3L/day, Increased Urine Volume (>2ml/min)
Osmotic
- Differential ... >50% - Proper kidney ... - Unresponsive Kidney ... • Nephrogenic ... #Nephrology #Differential
Polyuria - Differential Diagnosis Algorithm
Urine Output > 3L /day
Water Diuresis (Urine Osm <100 mOsm/kg)
 • Primary
Polyuria - Differential ... Insipidus • Nephrogenic ... solute load #Polyuria ... #Differential # ... Algorithm #causes #nephrology
Causes of Hypernatremia - Differential Diagnosis Algorithm
Hypernatremia - Excess free water loss, Serum Sodium >145 mmol/L
High
- Differential ... 145 mmol/L High Urine ... diuresis (see Polyuria ... glucosuria Low Urine ... #Nephrology #Differential
Hyponatremia Differential Diagnosis Table

 • Step 1: Correct for hyperglycemia. Corrected Na = [(glucose - 100)/
Hyponatremia Differential ... Diagnosis Table ... Serum Osm • Urine ... #Differential # ... #nephrology #sodium
Causes of Polyuria - Differential Diagnosis
Excess Intake of Water:
 • Primary polydipsia (a.k.a. "psychogenic polydipsia")
 •
- Differential ... injury, Tumor • Nephrogenic ... Mimics (↑ urine ... #Differential # ... Diagnosis #Causes #nephrology
Hypernatremia - Differential Diagnosis and Treatment
Hypernatremia is almost always due to unreplaced water loss (free water
history, exam, and urine ... DI; high dilute urine ... Diabetes Insipidus: neurogenic ... Diagnosis #Treatment #management ... #nephrology #sodium
Hypernatremia - Differential Diagnosis Workup Algorithm

1) Check Urine Osmolality:
 > 600 mOsm/kg - Implies extrarenal mechanism
Differential Diagnosis ... Algorithm 1) Check Urine ... insipidus (central or nephrogenic ... #Differential # ... Workup #Algorithm #nephrology
Distal Renal Tubular Acidosis (RTA)  Type 1 

Totally scuppers the kidney's acidification mechanism. Will be
Totally scuppers the kidney's ... Failure to acidify urine ... Distal #Diagnosis #Management ... #Nephrology #Causes ... #Differential #
Inherited Defects in Kidney Tubule Epithelial Cells

Renal glucosuria - Na+-dependent glucose cotransporter
Cystinuria - Amino acid transporter
Bartter
Inherited Defects in Kidney ... Inherited #Defects #Kidney ... #Nephrology #Diagnosis ... #Differential # ... Table
Urine chemistry tests for the diagnostic evaluation of a patient with polyuria
UOsm <100 mOsm/Kg (H2O diuresis)
Urine chemistry ... a patient with polyuria ... insipidus (central or nephrogenic ... #differential # ... diagnosis #nephrology