Contents
Introduction
https://www.youtube.com/watch?v=Sev0xmmU6LI
Urine volume in excess of 3l/day.
Aetiology
- OSMOTIC DIURESIS:
- Poorly controlled Diabetic mellitus
- Diuretic use
- Iatrogenic:
- Mannitol use
- Urea load from Total parenteral nutrition (TPN)
- IV fluids
- WATER DIURESIS
- Psychogenic polydipsia
- Excess water intake
- Diabetes insipidus:
- Cranial diabetes insipidus
- Pituitary mass
- Surgical complications
- Nephrogenic diabetic insipidus
- Lithium, diuretics, interstitial nephritis, hypokalemia, hypercalcaemia
- Cranial diabetes insipidus
- Psychogenic polydipsia
Diagnosis
- Water deprivation test (in controlled setting)
- Urea
- Creatinine & electrolytes
- Glucose
- Calcium
- Albumin
- 24-hour urine collection:
- Severity of polyuria
- Presence of nocturnal polyuria