During protamine administration following separation from cardiopulmonary bypass, blood pressure decreases from 100/70 to 60/30 mmHg and peak inspiratory pressure increases from 26 to 60 cm H2O. The most appropriate next step in management is administration of
Twenty minutes after thiopental induction for femoral herniorrhaphy, a 34-year-old woman is breathing spontaneously and receiving nitrous oxide-oxygen (2 liters each) and enflurane 3% by face mask. Pulse is 90 bpm, blood pressure is 80/60 mmHg, end-tidal enflurane concentration is 2%, and end-tidal carbon dioxide tension is 48 mmHg. Which of the following is most likely to occur on skin incision?
A patient who is scheduled for emergency laparotomy for bowel obstruction has had oliguria for three hours. She has had hypertension for 10 years. Which of the following laboratory findings would indicate preoperative fluid challenge?
(A) Urine osmolality: 300 mOsm/L
(B) Urine specific gravity: 1.015
(C) Urine sodium concentration: 35 mmol/L
(D) Fractional excretion of sodium: 0.5
(E) Ratio of urine-to-plasma creatinine concentrations: 8
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