A 24 hours urinary chloride test is done on a sample of all urine collected over a 24-hour period (called a 24-hour urine sample) to find out how much chloride is leaving the body in one’s urine. Chloride can also be measured in skin sweat to test for cystic fibrosis.

SPECIMEN: 10 mL (5 mL min.) aliquot of 24-hour urine. Refrigerate during collection. Record 24-hour volume on test request form and urine container.
STABILITY: Room: 6 hrs; Refrigerated: 72 hrs; Frozen: 1 week
REPORT: Daily
USAGE: Urine chloride helps to assess volume status, salt intake & causes of hypokalemia. Approximately 30% of hypovolemic patients show difference between urine sodium & chloride concentrations. It also aids in the diagnosis of Renal tubular acidosis.