Chloride

This test measures the amount of chloride in blood.

Chloride is an electrolyte, a negatively charged ion that works together with other electrolytes such as sodium, potassium and bicarbonate (all charged ions). The electrolytes regulate the total amount of fluid and the acidity of the body.

Salt in our food is made up of sodium and chloride. Thus, by eating salt, chloride enters the body. Most chloride is absorbed by the intestines so that it enters the blood. If too much chloride enters the body it is excreted again in the urine.

The doctor usually requests a chloride test in conjunction with other electrolytes, such as sodium, potassium and bicarbonate to get a general impression of the patient's health. The chloride test is also often requested for specific complaints such as prolonged vomiting, diarrhea, weakness or breathing problems.
The test is also used to check the effect of treatment in conditions such as high blood pressure, heart failure, liver disease and kidney disease.