Thirty-six hours after primary repair of meningomyelocele, a term newborn has frequent periods of apnea lasting 25 seconds and associated with oxygen desaturation to 80%. The most likely explanation is
A 30-year-old man receives spinal anesthesia to the level of T4. Ten minutes later, heart rate and blood pressure abruptly decrease to 30 bpm and 60/25 mmHg, respectively. The most appropriate management is administration of which of the following drugs?
A 4-month-old child undergoing a craniectomy for craniosynostosis is anesthetized with nitrous oxide and halothane. Suddenly the systolic blood pressure decreases from 75 to 30 mmHg, and the PetCO2 decreases from 35 to 6 mmHg. Which of the following maneuvers is LEAST likely to have a beneficial effect?
(A) Administration of a fluid bolus
(B) Administration of a vasopressor
(C) Application of positive end-expiratory pressure
(D) Discontinuation of nitrous oxide
(E) Flooding the surgical wound with saline solution
A 69-year-old woman with mitral stenosis and atrial fibrillation is scheduled for mitral valve replacement and removal of a left atrial thrombus. After administration of pancuronium, heart rate increases to 140 bpm and blood pressure decreases to 70/40 mmHg. Which of the following is the LEAST appropriate treatment?