During a reoperative total hip arthroplasty requiring transfusion of 8 units of packed red blood cells, blood begins to ooze from the operative field and intravenous catheter sites. Urine is pink. The most likely cause is
During an otherwise uneventful nitrous oxide-sevoflurane anesthetic in a spontaneously breathing patient, 85% nitrous oxide is accidently administered, resulting in a PO2 of 48 mmHg. Which of the following would be expected?
(B) is caused by direct suppression of platelet production
(C) is immunologically mediated
(D) is diagnosed by peripheral blood smear
(E) occurs only with larger intravenous doses of heparin
C
A 16-year-old child has an arterial catheter inserted prior to a potentially difficult intubation for a craniofacial operation. While awake and breathing room air, arterial blood gas values are: PaO2 134 mm Hg, PaCO2 28 mm Hg, and pH 7.45. These values can be explained by
(A) excess heparin mixed with the arterial sample
(B) a patient core temperature of 38°C
(C) excess air entrained in the syringe during sampling
(D) storing the sample at room temperature for 15 minutes before processing