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 mechanically ventilated newborn infant is undergoing gastroschisis repair during halothane anesthesia. Based on the right radial artery catheter tracing shown, which of the following is the most appropriate conclusion?
(A) The abdomen has not yet been incised
(B) The anesthetic should be changed from halothane to isoflurane
The following breath sounds are heard after placement of a left-sided double-lumen endobronchial tube.
The most likely cause of these findings is
(A) presence of both lumens in the right mainstem bronchus
(B) presence of both lumens in the left mainstem bronchus
(C) presence of both lumens in the trachea
(D) herniation of the bronchial cuff at the bifurcation of the trachea
(E) presence of the bronchial lumen in the right mainstem bronchus
C
Syringe A contains 100 ml of normal blood with a PO2 of 2 mmHg, and syringe B contains 100 ml of normal blood with a PO2 of 98 mmHg. The contents of the two syringes are mixed anaerobicaily to equilibrium. The PO2 of the resultant mixture Is
A 2500-g, 12-hour-old infant is tracheally intubated and mechanically ventilated at a rate of 20/min with an FiO2 of 0.4 and peak inspiratory pressure of 25 cmH2O. At birth, amniotic fluid was meconium stained and Apgar scores were 2 and 7. The most recent arterial blood gas levels are PaO2, 50 mmHg, PaCO2, 55 mmHg, and pH 7.20. The most appropriate management is to
(A) administer sodium bicarbonate
(B) begin intravenous infusion of prostaglandin E,