A 15-kg, 3-year-old child is anesthetized for an inguinal hernia repair with halothane and nitrous oxide. The trachea is intubated after administration of succinylcholine 30 mg. At the conclusion of the 45-minute procedure, the child is not breathing; a peripheral nerve twitch monitor indicates no response to a train-of-four stimulus. Further investigation is most likely to show
The muscular action most likely to remain intact following an axillary brachial plexus block is
A woman has weakness of the right quadriceps and a decreased knee jerk reflex on the right one day after forceps delivery under epidural anesthesia. The most likely cause is
Diffuse microvascular bleeding is noted in a patient who has received 25 units of whole blood for a liver resection. Platelet count is 40,000/mm3, prothrombin time is 18 sec, activated partial thromboplastin time is 54 sec, and serum fibrinogen concentration is 60 mg/dl. The most likely cause of the bleeding is
A 64-year-old, 87-kg woman in good general health is undergoing a right knee arthroplasty while in the supine position with general anesthesia consisting of enflurane 2% and nitrous oxide 50% in oxygen. She is breathing spontaneously through a 7-mm endotracheal tube. During the first 30 minutes of the procedure, the arterial oxygen saturation measured by pulse oximetry decreases from 98% to 92%. The most likely cause of the desaturation is
Which of the following provides the earliest indication of myocardial ischemia during general anesthesia?
Which of the following pre-existing conditions predisposes to new-onset third-degree heart block during pulmonary artery catheterization?
A patient is scheduled for amputation of the third metatarsal. A tourniquet will not be used during the procedure. The most effective anesthesia will be provided by block of which of the following nerves?
In which of the following clinical circumstances does down-regulation of beta-adrenergic receptors occur?
A 33-year-old primigravid woman with myasthenia gravis, well-controlled with pyridostigmine, is in labor with the cervix dilated 7 cm. She has a headache and feels very nervous. Blood pressure is 160/115 mmHg, she has 3+ pitting edema, and urinalysis shows 4+ protein. Appropriate management of her labor should include