doc4mindia
Forum Guru
Topics: 134
Posts: 243
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A 45-year-old woman with Crohn's disease and a small intestinal fistula develops tetany during the second week of parenteral nutrition. The laboratory findings include Ca 8.2 meq/L; Na 135 meq/L; K 3.2 meq/L; Cl 103 meq/L; PO4 2.4 meq/L; albumin 2.4; pH 7.48; magnesium 38 kPa; P 84 kPa; bicarbonate 25 meq/L. Which of the following is the most likely cause of the patient's tetany?
A. Hyperventilation
B. Hypocalcemia
C. Hypomagnesemia
D. Essential fatty acid deficiency
E. Focal seizure
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| fried water
Forum Junior
Topics: 4
Posts: 57
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i guess it is B. hypocalcemia
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| usmlebuzz
Forum Elite
Topics: 93
Posts: 263
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I think hypomagnesimia is the answer
patient has low albumin level
Calcium is corrected as follows: Corrected calcium (mg/dL) = measured total Ca (mg/dL) + 0.8 (4.4 - serum albumin [g/dL]), where 4.4 represents the average albumin level
also , Decreased intestinal absorption due to small bowel diseases is the most common cause of magnesium deficiency
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