Differential Diagnosis of Metabolic Alkalosis

Systematic approach to acid-base disorders with elevated bicarbonate.

Written by: Saygı Hospital Health Guide Editorial Board

Last updated: June 11, 2026

This content has been compiled by the Saygı Hospital Health Guide Editorial Board and is periodically reviewed by a specialist physician.

References (5)

This content is for informational purposes only and does not constitute medical advice. You can book an appointment at our Dahiliye (İç Hastalıkları) department. Book Appointment →

What is Differential Diagnosis of Metabolic Alkalosis?

Metabolic alkalosis is a primary acid-base disorder of elevated arterial pH and serum bicarbonate, often accompanied by compensatory hypoventilation.

Chloride-responsive forms include vomiting, nasogastric drainage, diuretic use and chloride-losing diarrhoea; urinary chloride is below 25 mmol/L.

Chloride-resistant forms with urinary chloride above 40 mmol/L are seen in primary hyperaldosteronism, Cushing syndrome, severe hypokalaemia and Bartter or Gitelman syndromes.

Symptoms

Muscle weakness

Cramps

Tetany

Confusion

Arrhythmia

Paraesthesia

Tremor

Risk Factors

Persistent vomiting

Long-term diuretic use

Nasogastric drainage

Adrenal disease

Severe hypokalaemia

Inherited tubular disorders

Excess alkali intake

When to See a Doctor?

If you experience any of the following symptoms, seek medical attention promptly:

Persistent vomiting and weakness
New paraesthesia or muscle cramps
Hypertension and hypokalaemia together
New arrhythmia
Confusion

Treatment Methods

Treatment of the underlying cause

Saline replacement in chloride-responsive cases

Potassium replacement

Aldosterone antagonist in chloride-resistant cases

Adjustment of diuretic regimen

Acetazolamide in severe alkalosis

Which Department to Visit?

You can visit our Dahiliye (İç Hastalıkları) department for these complaints. Our specialist physicians will create the most suitable treatment plan for you.

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Health Disclaimer: The information on this page is prepared for general informational purposes only. It does not replace medical diagnosis and treatment. Please consult your physician for your complaints. Saygı Hospital does not accept responsibility for actions taken based on the information on this page.