Features seen in a patient with chronic vomiting include-
Hyponatremia
Hypochloremia
Metabolic alkalosis
Hypokalemia
The most common causes of corrected hypochloremia are chronic vomiting of gastric contents and aggressive furosemide or thiazide therapy.Hypochloremia caused by increased renal chloride excretion is a normal adaptation to chronic respiratory acidosis Ref Davidson 23rd edition pg 361
Fluid and electrolytes