An oxygen-driven anesthesia ventilator with a bellows that ascends during exhalation develops a small hole in the bellows. Which of the following is the most likely effect?
(A) Alveolar hyperinflation
(B) Decreased inspiratory flow rate
(C) Decreased inspired oxygen concentration
(D) Increased concentration of inhalational agent
(E) Rebreathing of exhaled gases
A
Which of the following pre-existing conditions predisposes to new-onset third-degree heart block during pulmonary artery catheterization?
A patient who is scheduled for a gastrectomy had abnormal liver function tests for four days following a prior cholecystectomy. In your consultation note, you should
(A) recommend sevoflurane anesthesia since abnormal postoperative liver function tests are unlikely with this drug
(B) recommend subarachnoid anesthesia since changes in hepatic blood flow would be less than with general anesthesia
(C) indicate that abnormal liver function tests are likely to follow this operation regardless of the anesthetic drugs used
(D) require preoperative screening for hepatitis B antigen and antibodies
(E) recommend avoiding halothane since it is more likely to produce hepatitis in patients who had previous upper abdominal surgery
A 31-year-old man received an uneventful epidural anesthetic for arthroscopy of the knee and meniscectomy. Twenty-four hours later he still has painless flaccid paralysis in both legs. This clinical presentation is most consistent with
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
During transurethral resection of the prostate under spinal anesthesia with a sensory level to T10, a patient has sudden onset of sharp upper abdominal pain and nausea. Arterial blood pressure increases from 120/80 to 150/90 mmHg; the patient becomes diaphoretic. Which of the following is the most likely diagnosis?