Arterial Blood Gas Interpretation Q 17

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In a patient undergoing surgery, it was vital to aspirate the contents of the upper gastrointestinal tract. After the operation, the following values were acquired from an arterial blood sample: pH 7.55, PCO2 52 mm Hg and HCO3- 40 mmol/l. What is the underlying disorder?

  

     A. Respiratory Acidosis

     B. Respiratory Alkalosis

     C. Metabolic Acidosis

     D. Metabolic Alkalosis

    

    

Correct Answer: D. Metabolic Alkalosis

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NGT suctioning, vomiting, hypokalemia and overdosage of NaHCO3 are considered risk factors of metabolic alkalosis.

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