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Anaesthesia Practice MCQs

Browse 3,265 high-yield clinical questions in Anaesthesia. Includes detailed explanations, options, and topic tags.

#171 Preoperative assessment and monitoring in anaesthesia

A 45-year-old woman with Crohn disease and a small intestinal fistula develops tetany during the second week of parenteral nutrition. The laboratory findings include Na: 135 mEq/L K: 3.2 mEq/L Cl: 103 mEq/L HCO3 : 25 mEq/L Ca: 8.2 mEq/L Mg: 1.2 mEq/L PO4 : 2.4 mEq/L Albumin: 2.4 An aerial blood gas sample reveals a pH of 7.42, PCO2 of 38 mm Hg, and PO2 of 84 mm Hg. Which of the following is the most likely cause of the patient's tetany?

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