The principal rationale for the use of warmed humidified inspired anesthetic gases in children is to
Which of the following results in the greatest increase in right-to-left shunting in an infant with cyanotic heart disease?
Upon removal of the epidural catheter after uneventful labor and delivery in a 25-year-old primiparous woman, approximately 1.2 cm of the Teflon catheter is left behind in the epidural space. The patient is informed of the complication. The most appropriate management is
Each of the following conditions is associated with autonomic hyperreflexia in patients with spinal cord injury EXCEPT
A 70-kg 24-year-old man with bilateral pneumonia whose lungs are being mechanically ventilated has the following measured parameters: tidal volume 750 ml; FiO2 0.7; rate 12/min; positive end-expiratory pressure 10 cmH2O; PaO2 75 mmHg; PaCO2 55 mmHg; pH 7.30. Which of the following alterations should be made in the ventilatory settings?
In the elderly, scopolamine-induced delirium is
A 26-year-old man who sustained multiple trauma undergoes open reduction and internal fixation of bilateral tibial-fibular fractures during anesthesia with isoflurane. nitrous oxide, and oxygen with positive pressure ventilation. During the procedure, the patient has sudden onset of hypotension, jugular venous distention, deviation of the trachea to the right, and decreased ventilatory compliance. Isoflurane is discontinued and 100% oxygen is administered. Which of the following is the most appropriate next step in management?
Brain stem auditory evoked potentials are most likely to be absent during which of the following?
During laser microsurgery of the larynx using an endotracheal tube, a fire occurs in the airway. Which of the following is the most appropriate initial management?
Two days after myocardial infarction involving the left anterior descending coronary artery, a patient's blood pressure decreases acutely from 125/80 to 70/40 mmHg, heart rate increases from 75 to 90 bpm, pulmonary artery pressure increases to 50/30 mmHg, and urine output decreases from 60 to 10 ml/hr. Thermodilution cardiac output has increased from 4 to 7 L/min. The most appropriate action is to