43 results
Causes of Polyuria - Differential Diagnosis
Excess Intake of Water:
 • Primary polydipsia (a.k.a. "psychogenic polydipsia")
 •
Causes of Polyuria ... Poorly controlled diabetes ... Diabetes Insipidus ... • Nephrogenic DI ... Hypercalcemia Polyuria
Water Deprivation Test - Differential Diagnosis of Diabetes Insipidus (DI)
Concept of WDT: endogenous vasopressin secretion is
Differential Diagnosis of Diabetes ... Insipidus (DI) ... concentration capacity #Diabetes ... #Insipidus #DI
Polyuria - Differential Diagnosis Algorithm
Urine Output > 3L /day
Water Diuresis (Urine Osm <100 mOsm/kg)
 • Primary
Polyuria - Differential ... Polydipsia • Central Diabetes ... Insipidus • Nephrogenic ... Diabetes Insipidus ... solute load #Polyuria
Causes of Polyuria - Differential Diagnosis Algorithm
Polyuria - Urine Output > 3L/day, Increased Urine Volume (>2ml/min)
Osmotic
Causes of Polyuria ... Diagnosis Algorithm Polyuria ... (Uncontrolled Diabetes ... Insipidus - DDAVP ... Insipidus #Polyuria
Hypernatremia Differential Diagnosis Algorithm - Diabetes Insipidus Workup

Step #1 - Consider the history
Step #2 - Assess
Diagnosis Algorithm - Diabetes ... Insipidus Workup ... Sodium #nephrology #insipidus ... #DI
Polyuria - Differential Diagnosis Algorithm
Polyuria = >3L Urine output / 24 hours
Urine osmolality = 2 (Na
Polyuria - Differential ... Diagnosis Algorithm Polyuria ... 100 mosm/kg • Diabetes ... Insipidus • Primary ... Polydipsia #Polyuria
Central vs Nephrogenic Diabetes Insipidus - Desmopressin Challenge
Give desmopressin (intranasal, SQ, IV) and monitor UOsm every
vs Nephrogenic Diabetes ... Insipidus - Desmopressin ... #Nephrogenic #Diabetes ... #Insipidus #DI
Diabetes Insipidus vs Syndrome of Inappropriate ADH (SIADH) - Comparison Table

Diabetes Insipidus - Inadequate ADH
SIADH -
Diabetes Insipidus ... Comparison Table Diabetes ... Insipidus - Inadequate ... Excess ADH #Diabetes ... #Insipidus #SIADH
Polyuria - Differential Diagnosis
Solute Diuresis
 • Na intake/saline
 • Glucosuria: Hyperglycemia, SGLT-2 inhibitors
 • Urea: Exogenous
Polyuria - Differential ... Polydipsia • Central DI ... @kdjhaveri #Polyuria
Pathophysiology of Diabetic Ketoacidosis (DKA) and Hyperglycemic Hyperosmolar Syndrome (HHS)
Absolute Insulin deficit:
 - Type I DM:
Pathophysiology of Diabetic ... → Glucosuria → Polyuria ... endocrinology #diabetes ... #diabetic #ketoacidosis