Which of the following drugs used to produce or reverse muscle relaxation has the greatest prolongation of action in a patient with end-stage renal disease?
(A) Atracurium
(B) Neostigmine
(C) Pancuronium
(D) Succinylcholine
(E) Vecuronium
B
A 69-year-old man is confused and agitated one hour after preoperative intramuscular administration of scopolamine for awake fiberoptic laryngoscopy. SpO2 measured by pulse oximetry is 97%. Which of the following drugs is most appropriate for treatment of the change in mental status?
A 35-year-old woman receiving isoflurane anesthesia suddenly develops tachycardia, hypertension, and multifocal ventricular ectopy during dissection of a pheochromocytoma. Each of the following would be appropriate treatment EXCEPT
(A) administration of an alpha-adrenergic blocker
(B) administration of a beta-adrenergic blocker
(C) administration of lidocaine
(D) administration of nitroprusside
(E) switching from isoflurane to enflurane
E
A healthy, but obese, 110-kg woman is scheduled for gastric stapling. Compared with that required at her ideal weight, the dose of thiopental required for anesthetic induction would likely be increased because of changes in
During laser excision of vocal cord polyps in a 5-year-old boy, dark smoke suddenly appears in the surgical field. The trachea is intubated and anesthesia is being maintained with halothane, nitrous oxide, and oxygen. The most appropriate initial step is to
The ECG rhythm shown developed during cholecystectomy in a 62-year-old man who had a myocardial infarction and is taking atenolol. The drug of choice for treating this dysrhythmia is
(A) atropine
(B) bretylium
(C) isoproterenol
(D) lidocaine
(E) procainamide
A
Which of the following is decreased by alkalinization of a 1.5% lidocaine solution?
(A) Concentration of free base
(B) Dose required for anesthesia
(C) Duration of anesthesia
(D) Intracellular concentration of ionized lidocaine