Electrolyte Disturbances Due to Vomiting

Pathophysiology and Clinical Presentation

Vomiting can cause both hypochloremia and hyponatremia due to loss of chloride-rich gastric fluid and subsequent volume depletion, which triggers compensatory mechanisms affecting sodium balance, as noted by Clinical Nutrition 1
In older adults with volume depletion following vomiting, at least four of seven signs indicate moderate to severe depletion, including confusion, non-fluent speech, extremity weakness, dry mucous membranes, dry tongue, furrowed tongue, and sunken eyes, according to Clinical Nutrition 1, 2

For volume depletion following vomiting, isotonic fluids should be administered to replace lost water and electrolytes, with the route of administration depending on severity, as recommended by Clinical Nutrition 1, 2
Potassium replacement may be necessary as vomiting often leads to concurrent hypokalemia, as stated in Praxis Medical Insights: Practical Summaries of Clinical Guidelines 3

For patients with recurrent vomiting, early intervention with antiemetics and fluid replacement can prevent severe electrolyte disturbances, and in endurance athletes or individuals at risk of exercise-associated hyponatremia, education about proper hydration strategies is important, according to Sports Medicine 4