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Self-induced vomiting presenting as Bartter's syndrome

B J Murray

    Postgraduate Medicine
    |December 1, 1982
    PubMed
    Summary

    Habitual vomiting can mimic Bartter syndrome's metabolic issues. A key difference is urine chloride levels, helping distinguish between self-induced vomiting and the syndrome.

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    Area of Science:

    • Nephrology
    • Endocrinology
    • Gastroenterology

    Background:

    • Physiologic effects of habitual vomiting can resemble Bartter syndrome.
    • Both conditions present with hypokalemic metabolic alkalosis and elevated renin/aldosterone.
    • Distinguishing between these conditions is crucial for accurate diagnosis and treatment.

    Observation:

    • A case study of a young woman with self-induced vomiting presented with metabolic abnormalities.
    • Her condition mimicked Bartter syndrome, including hypokalemia and alkalosis.
    • Urinary chloride levels were notably low, below 10 mEq/liter.

    Findings:

    • Habitual vomiting leads to gastrointestinal chloride loss, resulting in low urine chloride levels (<10 mEq/liter).
    • Bartter syndrome is characterized by defective chloride reabsorption, leading to high urine chloride levels (>20 mEq/liter).
    • The patient's low urinary chloride level was the distinguishing factor from Bartter syndrome.

    Implications:

    • Accurate differentiation between habitual vomiting and Bartter syndrome is essential.
    • Low urinary chloride levels can indicate gastrointestinal fluid loss rather than a primary renal defect.
    • This distinction guides appropriate clinical management and avoids misdiagnosis of rare genetic disorders.

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