Blood Gas Chloride (Other)

This test measures the amount of chloride in a blood sample analyzed on a blood gas device. Chloride is a major electrolyte that helps keep your body’s fluids balanced and supports normal acid–base status. In a blood gas panel, chloride is measured directly in whole blood.

“Other” indicates the sample is not a standard arterial blood gas; it may be venous, capillary, or another clinically appropriate source. The measurement is often ordered together with pH, carbon dioxide, oxygen, sodium, potassium, and bicarbonate to give a real‑time picture of your circulation and metabolism.

Chloride levels can shift with dehydration or fluid overload, kidney problems, losses from the stomach or intestines, and with certain intravenous fluids. Because chloride closely links to bicarbonate, it is a key clue to acid–base disorders, such as metabolic acidosis or alkalosis.

Your care team may order this test if you are acutely ill, have suspected acid–base imbalance, are receiving large volumes of IV fluids, use diuretics, or have ongoing vomiting or diarrhea. It helps guide treatment decisions in emergency, intensive care, perioperative, and other urgent settings.

Your result is interpreted alongside other measurements, including sodium, potassium, bicarbonate, pH, and carbon dioxide, plus your symptoms and medical history. A higher chloride level can be seen with some types of metabolic acidosis, after large volumes of certain IV fluids, or with specific kidney conditions. A lower level can occur with prolonged vomiting, gastric suction, or some diuretics, and may accompany metabolic alkalosis.

If your value is unexpected, your clinician may confirm it with a repeat test or a central laboratory electrolyte panel, review your medications and IV fluids, and consider urine studies or kidney tests. Small differences can occur between blood gas analyzers and standard laboratory methods, so results are always viewed in clinical context.