Chloride test
Quick answer: A chloride test measures chloride, an electrolyte that helps keep fluid and acid-base balance, in blood, urine or other body fluids. It is usually part of an electrolyte panel to check dehydration, kidney problems or acid-base balance.
- SampleBlood, urine or fluid
- TakesAbout 5 minutes for blood; longer for urine or fluid collection
- Before the testNo special preparation is usually needed; for a 24-hour test, collect all your urine as instructed.
How the test is done
- 1For blood, a needle draws a sample from a vein
- 2For urine, you give a single sample or collect all urine for 24 hours
- 3CSF or other fluid is collected by a doctor during a procedure
- 4The lab measures chloride, usually with sodium and potassium
What your results can mean
Reading your report
Normal ranges differ between labs and by age and sex, so discuss your result with your doctor.
If the result is outside the usual range
A high level can be seen with dehydration, some kidney problems or diarrhoea. A low level can be seen with long-term vomiting, some water tablets, or heart or lung conditions.
Who usually has this test
People with dehydration, vomiting, kidney problems or acid-base imbalance, usually as part of an electrolyte panel.
Risks and aftercare
A blood sample may bruise slightly; fluid procedures have their own aftercare, which your doctor will explain.
Names and options
Also called: serum chloride, urine chloride
Options
- Blood (serum)
- 24-hour urine
- Spot urine
- CSF
- Body fluid
Listed by the hospital as
- CHLORIDES, SERUM
- CHLORIDES 24 HRS URINE
- CHLORIDE, CSF
- CHLORIDE, FLUID
- CHLORIDES SPOT URINE
Questions about this test
Why is chloride tested with sodium and potassium?
These electrolytes work together to control fluid balance and acidity. Looking at them together helps your doctor spot patterns.
What does urine chloride show?
It helps doctors understand why blood electrolytes are abnormal, for example after vomiting or with water tablets.
Is blood chloride the same as the sweat chloride test?
No. The sweat test measures chloride in sweat to check for cystic fibrosis, while blood chloride checks fluid and acid-base balance.
Related tests
Tamara Hospital & IVF Centre, Rajajinagar
34/3, 10th Cross Road, opp. Vardhaka Sardar Patel School, 1st N Block, 2nd Stage, Rajajinagar, Bengaluru 560010
The hospital is open 24 hours. Call before you come to check the timing for your scan or sample collection.
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This page explains each test in general terms so you know what to expect. It is not medical advice: your doctor decides which tests you need and what your results mean. Reference ranges differ between laboratories. Updated 4 November 2026.