Following abdominal surgery, excessive drainage from the client's nasogastric tube is observed. Which assessment finding is most likely to occur?
A) Metabolic acidosis—pH 7.24, PaCO2 45 mm Hg, HCO3 19 mEq/L
B) Metabolic alkalosis—pH 7.52, PaCO2 35 mm Hg, HCO3 28 mEq/L
C) Respiratory acidosis—pH 7.28, PaCO2 60 mm Hg, HCO3 25 mEq/L
D) Respiratory alkalosis—pH 7.73, PaCO2 20 mm Hg, HCO3 26 mEq/L
B
Feedback:
Metabolic alkalosis is most likely to occur with prolonged or excessive nasogastric suctioning because acids are removed from the stomach a loss of hydrogen ions occurs. A rise in pH levels also occurs with respiratory alkalosis, but because the cause is gastro, this is a metabolic problem. A decrease in pH levels below 7.35 would result in acidosis.
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