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Chloride Test

⚠️ Update approaching🔬 Evidence: ModerateInternal Medicine
Diğer adları: Chloride level, Cl, Serum chloride
⚠️

Discuss your test results with your doctor. This page is for informational purposes only and does not provide a diagnosis.

⚡ Key Facts

• Measures blood chloride level — the most abundant anion in extracellular fluid after sodium • Normal: 96–106 mEq/L (mmol/L) • Closely linked to sodium and acid-base balance • Rarely abnormal in isolation — usually changes alongside sodium or bicarbonate

🧪 What Does This Test Measure?

The chloride test measures blood chloride level, the most abundant extracellular anion, which maintains fluid balance, electrical neutrality, and acid-base equilibrium.

📋 Why Is It Ordered?

Ordered for electrolyte imbalance and acid-base disorder evaluation, kidney disease monitoring, and as part of metabolic panels.

🔧 Preparation

No special preparation is generally required. Chloride is usually measured as part of a metabolic panel.

📊 Reference Ranges

Normal: 96–106 mEq/L (mmol/L) Low (hypochloremia): <96 mEq/L High (hyperchloremia): >106 mEq/L ⚠️ Reference ranges may vary by laboratory.

⬆️ High Values

High chloride may be associated with chloride-rich IV fluids, diarrhea, renal tubular acidosis, or hypernatremia.

⬇️ Low Values

Low chloride may be associated with prolonged vomiting, nasogastric drainage, diuretic use, and metabolic alkalosis.

⚙️ What Can Affect Results?

Medications (diuretics, corticosteroids), IV fluids, vomiting, diarrhea, and kidney function may affect chloride results.

🔬 Evidence Summary

Moderate evidence: 1 guideline, 2 reviews, and 1 observational study.

📚 Most Important Studies on This Topic

1

KDIGO 2024 Clinical Practice Guideline for the Evaluation and Management of Chronic Kidney Disease

Guideline· Kidney International · 2024 · PMID: 38490803

2

Chloride: the queen of electrolytes?

Review· European Journal of Internal Medicine · 2012 · PMID: 22385875

3

Serum chloride levels in critical illness-the hidden story

Review· Intensive Care Medicine Experimental · 2018 · PMID: 29654387

✅ Key Takeaways

💡

What you learned: Chloride changes usually parallel sodium or reflect acid-base disturbances. Isolated chloride abnormalities are uncommon.

⛔

A chloride result alone cannot determine the cause of electrolyte imbalance. It must be interpreted alongside sodium, bicarbonate, and clinical context.

🔬 Sources Used on This Page

4 sources · Most recent publication: 2024
📋
Guideline
Expert society and guideline recommendations
1
source
📖
Review
Comprehensive topic evaluation
2
sources
👁
Observational
Observational and cohort studies
1
source
Overall assessment: Evidence level for this topic is moderate. This page is supported by 1 guideline, 2 reviews, 1 observational study.

📝 Questions to Ask Your Doctor

Be prepared for your appointment. Add questions to your list.

📋 References

[PMID: 38490803] KDIGO 2024 Clinical Practice Guideline for the Evaluation and Management of Chronic Kidney Disease. Kidney International, 2024.
[PMID: 29654387] Serum chloride levels in critical illness-the hidden story. Intensive Care Medicine Experimental, 2018.
[PMID: 28328963] Chloride alterations in hospitalized patients: Prevalence and outcome significance. PLoS One, 2017.
[PMID: 22385875] Chloride: the queen of electrolytes?. European Journal of Internal Medicine, 2012.
Last reviewed: 4/1/2026
Next review: 4/1/2027

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⚖️ This page does not replace medical advice. Make treatment decisions with your doctor.
Content is based on scientific studies indexed in PubMed and current clinical guidelines.