A 45-year-old man is scheduled for exploratory laparotomy. Six months ago, he received doxorubicin (Adriamycin) therapy for testicular cancer. This patient is at increased risk for
A patient is hyperventilated to a PaC02 of 20 mmHg. Which of the following physiologic parameters is most likely to be increased?
(A) Airway resistance
(B) Myocardial contractility
(C) Oxygen delivery to tissues
(D) Pulmonary vascular resistance
(E) Serum ionized calcium concentration
A
A 58-year-old woman with rheumatoid arthritis and hyperactive gag reflex requires awake intubation prior to cervical spine stabilization. Which of the following regional nerve blocks is most appropriate?
An 18-year-old patient with hemophilia A is scheduled for inguinal hernia repair. Preoperatively, factor VIII concentration is 60% of normal. The most appropriate management is administration of
(A) fresh frozen plasma
(B) cryoprecipitate
(C) factor VIII concentrate
(D) vitamin K
(E) none of the above
E
A 40-year-old man is scheduled for emergency laparotomy for bowel obstruction. He is nauseated but has not vomited. Which of the following drugs administered intravenously preoperatively will decrease the risk for pulmonary aspiration?
(A) Atropine
(B) Droperidol
(C) Metoclopramide
(D) Ranitidine
(E) None of the above
E
Following paravertebral blocks of the second through fifth intercostal nerves, numbness is noted on the medial aspect of the ipsilateral arm. The most likely cause is
(A) anesthesia of the intercostobrachial nerve
(B) anxiety-induced hyperventilation
(C) injection into a dural cuff
(D) intravascular injection of local anesthetic
(E) partial block of the brachial plexus
A
During craniotomy in the sitting position, end-tidal carbon dioxide tension suddenly decreases. Ventilatory excursion of the chest is normal. Further evaluation is most likely to show a decrease in