32 results
Primary Polydipsia
Definition: Excessive volitional water intake
Epidemiology:
 • 6-20% of patients with psychiatric disorders - Most commonly
Primary Polydipsia ... smokers Primary Polydipsia ... Alert_Oriented3 #Primary #Polydipsia
Causes of Polyuria - Differential Diagnosis
Excess Intake of Water:
 • Primary polydipsia (a.k.a. "psychogenic polydipsia")
 •
Water: • Primary polydipsia ... "psychogenic polydipsia
Polyuria - Differential Diagnosis
Solute Diuresis
 • Na intake/saline
 • Glucosuria: Hyperglycemia, SGLT-2 inhibitors
 • Urea: Exogenous
Diuresis • Primary Polydipsia
Classification, Differential Diagnosis, and Features of Hyponatremia According to Volume Status 

Hypervolemic hypernatremia 
 - CHF
- Psychogenic polydipsia
Hyponatremia Diagnosis Algorithm
UOsm ≥ POsm - Vasopressin-Dependent
 • UNa < 20 mEq/L - Appropriate (↓ EABV)
Consider: Primary polydipsia
Diagnostic Approach to Hyponatremia
Box A:
 • Normo/hyperosmolar Hyponatremia: Glucose, Mannitol, Glycine, Contrast media, Maltose
 • Pseudohyponatremia:
Box C: Primary Polydipsia
Diabetic Ketoacidosis (DKA) - Diagnosis and Management Summary

Symptoms:
• Abdominal pain
• Nausea
• Polyuria
• Polydipsia
• Vomiting
• Weight loss
•
• Polyuria • Polydipsia
Pathyophysiology - hyperglycemic crises in patients with diabetes 
Key signs/symptoms of HHS/DKA:
Both: Polyuria, polydipsia, weight loss,
Both: Polyuria, polydipsia
Diabetic Ketoacidosis (DKA) - Diagnosis and Management Summary

Symptoms:
• Abdominal pain
• Nausea
• Polyuria
• Polydipsia
• Vomiting
• Weight loss
•
• Polyuria • Polydipsia
Pathophysiology of Diabetic Ketoacidosis (DKA) and Hyperglycemic Hyperosmolar Syndrome (HHS)
Absolute Insulin deficit:
 - Type I DM:
Electrolyte imbalance → Polydipsia