Laboratory Test Information Guide

Details for Chloride, 24-Hour Urine

Test Name: Chloride, 24-Hour Urine
Alternate Name(s):  
Laboratory: Core
Specimen Type: 24 Hour Urine
Collection Information: Collection of 24-Hour Urine Sample

Specimen must be refrigerated during collection period.

Please complete the laboratory label attached to the collection bottle to include patientís name, collection start time and date and collection end time and date.
Test Schedule: As required
Turnaround time from when specimen
is received in testing laboratory:
4 hours
ASAP: 2 hours
Reference Range: 170-250 mmol/d
Effective Date:  
Revised Date: 2019-02-21
Critical Value:  
Interpretive Comments: Useful in diagnosing disorders of acid-base and water balance.

Monitoring compliance with a low salt diet.
Urine chloride excretion approximates the dietary intake.

An increase in urine chloride may result from water deficient dehydration, diabetic acidosis, Addison's disease and salt-losing renal disease.

Decreased urine levels are seen in congestive heart failure, severe diaphoresis and in hypochloremic metabolic alkalosis due to prolonged vomiting.
Special Processing:  
Comments: High urine values of other halide ions (e.g. bromide, fluoride and iodide) may lead to falsely high readings on the chloride ion-selective electrode.
Method of Analysis: Potentiometric, Indirect Ion-Selective Electrode (ISE)
Critical Information Required:  
Storage & Shipment:  
System Codes: 
Referred To:  

Questions? Comments? Contact Laura Gopaul