A previously healthy 28-year-old man is admitted to the emergency department with a probable opioid overdose. Arterial blood gas values are: PaO2 49 mmHg, PaCO2 76 mmHg, and pH 7.12 while breathing room air. Which of the following statements is true?
After tracheal extubation, a healthy 21-year-old man has a 30-second episode of laryngospasm with marked intercostal and sternal retractions, which are corrected with continuous positive airway pressure administered by mask. He now has dyspnea and tachypnea, and a roentgenogram of the chest shows diffuse bilateral interstitial edema. The most likely cause is increased
Which of the following is most likely in a 30-year-old patient with untreated hypothyroidism?
A 36-year-old woman who undergoes peritoneal dialysis for chronic renal failure requires emergency surgical exploration for bowel obstruction. Serum creatinine concentration is 9.8 mg/dl and BUN concentration is 124 mg/dl. The most likely abnormality of coagulation is
Which of the following statements about pulmonary function testing is true?
A 5-year-old boy is to undergo microlaryngeal carbon dioxide laser vaporization of laryngotracheal papillomas under halothane administered through a small polyvinylchloride (PVC) endotracheal tube. The diluent gas mixture LEAST likely to support laser combustion of the PVC tube is
A healthy 18-year-old youth is scheduled for an emergency operation for removal of a steel splinter from his right iris. Anesthesia is induced with thiopental and pancuronium and, following tracheal intubation, is maintained with nitrous oxide 2 liters, oxygen 2 liters, and halothane 1.5%. Conjunctival instillation of phenylephrine solution 10% increases blood pressure from 110/70 to 230/110 mmHg and decreases pulse from 70 to 46 bpm. The ECG shows a bigeminal pattern. The most appropriate treatment is to
During uncomplicated mask induction with halothane and 50% nitrous oxide in oxygen in a 6-month-old infant with a large ventricular septal defect and valvular pulmonic stenosis, SpO2 decreases from 85% (room air) to 60%; heart rate is 100 bpm and blood pressure is 62/40 mmHg. The most appropriate management is to
Which of the following muscle relaxants is most likely to result in histamine release following administration of a bolus dose sufficient to facilitate rapid endotracheal intubation?
A 2.2-kg, 6-hour-old neonate is to undergo gastrostomy followed by repair of a tracheoesophageal fistula. During induction with halothane, air, and oxygen, the abdomen becomes distended. Appropriate management is to