Causes of Metabolic Alkalosis - Differential Diagnosis Algorithm
Urine chloride < 20 mmol/l - Chloride responsive (Chloride depletion):
• Vomiting
• NG suction
• Chloridorrhea
• Cystic fibrosis
• Remote diuretic use
Urine chloride > 20 mmol/l - Chloride resistant:
• Current diuretic use, Severe K depletion, Exogenous alkali, Mg deficiency
• Increased BP = Hyperaldosteronism
• Decreased BP = Bartter's Syndrome, Gitelman's Syndrome
Dr. John Booth @ThePeanutKidney
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