1595 results
Polyuria - Differential Diagnosis Algorithm
Urine Output > 3L /day
Water Diuresis (Urine Osm <100 mOsm/kg)
 • Primary
Diagnosis Algorithm Urine ... Water Diuresis (Urine ... Central Diabetes Insipidus ... Nephrogenic Diabetes Insipidus ... Algorithm #causes #nephrology
Causes of Polyuria - Differential Diagnosis Algorithm
Polyuria - Urine Output > 3L/day, Increased Urine Volume (>2ml/min)
Osmotic
day, Increased Urine ... Osmotic Diuresis Urine ... Central Diabetes Insipidus ... Nephrogenic Diabetes Insipidus ... #Polyuria #Nephrology
Polyuria - Differential Diagnosis Algorithm
Polyuria = >3L Urine output / 24 hours
Urine osmolality = 2 (Na
Polyuria = >3L Urine ... output / 24 hours Urine ... mg/dL]/18 HIGH urine ... kg • Diabetes Insipidus ... Diagnosis #Algorithm #nephrology
Diabetes Insipidus - Diagnosis Algorithm
Tests:
 • Osmolality, Urine AND/OR
 • Osmolality, Serum or Plasma AND
 •
Diabetes Insipidus ... • Osmolality, Urine ... + Osmolality, Urine ... ARUPLabs #Diabetes #Insipidus ... Diagnosis #Algorithm #nephrology
Urine Specific Gravity - Interpretation
Specific Gravity = Density of urine / Density of water
SG close to
Urine Specific Gravity ... Gravity = Density of urine ... hydration • Diabetes insipidus ... EricsMedicalLectures/ #Urine ... #differential #nephrology
Causes of Hypernatremia - Differential Diagnosis Algorithm
Hypernatremia - Excess free water loss, Serum Sodium >145 mmol/L
High
145 mmol/L High Urine ... glucosuria Low Urine ... kg • Diabetes Insipidus ... Hypernatremia #Nephrology
Causes of Polyuria - Differential Diagnosis
Excess Intake of Water:
 • Primary polydipsia (a.k.a. "psychogenic polydipsia")
 •
Diabetes Insipidus ... Polyuria Mimics (↑ urine ... frequency without ↑ urine ... Diagnosis #Causes #nephrology
Hypernatremia - Differential Diagnosis Workup Algorithm

1) Check Urine Osmolality:
 > 600 mOsm/kg - Implies extrarenal mechanism
Algorithm 1) Check Urine ... Euvolemic: Diabetes insipidus ... Workup #Algorithm #nephrology
Primary Polydipsia
Definition: Excessive volitional water intake
Epidemiology:
 • 6-20% of patients with psychiatric disorders - Most commonly
deficits impairing urine ... Co-morbid diabetes insipidus ... Diagnosis: Diabetes Insipidus ... Serum Sodium, Urine ... diagnosis #management #nephrology
Urine chemistry tests for the diagnostic evaluation of a patient with polyuria
UOsm <100 mOsm/Kg (H2O diuresis)
Urine chemistry ... polydipsia • Diabetes insipidus ... differential #diagnosis #nephrology