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10802 Surgery

A young college student injures his left knee while playing football and is unable to bear weight. The provisional x-ray report indicates that there are no fractures seen. He is discharged home but presents the next morning to the emergency department with a severely swollen, painful left knee and severe pain in the foot. On examination, the foot is pale, cold, and pulseless. What is the most likely diagnosis?

ATraumatic deep vein thrombosis
BGastrocnemius muscle tear
CTraumatic arteriovenous fistula
DPosterior knee dislocation with thrombosed popliteal artery
Surgery
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10807 Surgery

A 50-year-old man with small-bowel fistula has been receiving TPN for the previous 3 weeks through a single-lumen central venous catheter. He is scheduled for exploratory laparotomy and closure of fistula. On the morning of the day of surgery, TPN is discontinued and intra-venous infusion with balanced salt solution (Ringer’s lactate) is staed. An hour later, the patient is found to be anxious, sweating, and tachycardic. What is the most likely cause?

AAnxiety
BHypoglycemia
CHypovolemia
DUnexplained hemorrhage
Surgery
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