10 Random Questions
The EKG 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 arrhythmia is
- (A) atropine
- (B) bretylium
- (C) isoproterenol
- (D) lidocaine
- (E) procainamide
In the PACU after resection of an occipital astrocytoma, a patient has a urine output greater than 300 ml/hr, serum osmolality of 310 mOsm/L, and a hematocrit of 40% (equal to the preoperative value). Intraoperative blood loss was estimated to be 750 ml; furosemide and mannitol were administered during the procedure. The most appropriate next step is
- (A) restriction of free water
- (B) administration of 0.9% saline solution
- (C) administration of desmopressin
- (D) administration of dexamethasone
- (E) CT scan of the brain
Which of the following statements concerning the risk of acquiring hepatitis from a blood transfusion is true?
- (A) Most patients with post-transfusion hepatitis become clinically jaundiced
- (B) Most cases of post-transfusion hepatitis are caused by the hepatitis B virus
- (C) The risk for hepatitis is less than the risk for AIDS
- (D) The risk for post-transfusion hepatitis is less than 1% per unit transfused
- (E) The incidence of post-transfusion hepatitis has remained unchanged over the past decade
A 20-year-old man involved in a motor vehicle accident is brought to the operating room for irrigation and debridement of open fractures of the femur and humerus. Cyanosis, decreased breath sounds on the left, increased peak airway pressure, and hypotension are noted after intubation of the trachea. The most likely cause is
- (A) aspiration
- (B) fat embolus
- (C) intubation of the right mainstem bronchus
- (D) tension pneumothorax
- (E) unilateral bronchospasm
Which of the following time concentration curves would be expected in arterial blood following intravenous injection of indocyanine green dye in a 3-year-old child with a small ventricular septal defect?
Which of the following combinations of anesthetic and incorrect vaporizer results in the smallest error in delivered concentration?
- (A) Sevoflurane in a halothane vaporizer
- (B) Sevoflurane in an isoflurane vaporizer
- (C) Halothane in a desflurane vaporizer
- (D) Isoflurane in a halothane vaporizer
- (E) Sevoflurane in a desflurane vaporizer
A 40-year-old woman has continuous nondermatomal burning pain of the distal foot four weeks after sustaining a metatarsal fracture. On examination, the foot is mildly swollen, tender, and cool. Which of the following statements concerning this condition is true?
- (A) A radiograph of the distal bones of the painful foot will show severe osteoporosis
- (B) A technetium scan of the distal joints of the painful foot will show decreased uptake
- (C) Early use of opioid analgesia will prevent progression of the symptoms
- (D) Intravenous phentolamine will relieve the pain
- (E) The chance of spontaneous recovery within eight weeks is greater than 80%
To predict the requirement for isoflurane in milliliters of vapor per minute during closed circuit anesthesia, each of the following is necessary EXCEPT
- (A) cardiac output
- (B) oxygen consumption
- (C) MAC of isoflurane
- (D) duration of administration
- (E) blood-gas partition coefficient
Compared with adults, neonatal respiratory function is characterized by
- (A) a lower ratio of dead space to tidal volume
- (B) a more compliant chest wall
- (C) a more positive intrapleural pressure at end-expiration
- (D) less susceptibility to atelectasis
- (E) the same oxygen requirement per kilogram of body weight
A 14-year-old girl with status asthmaticus is receiving oxygen 3 L/min through nasal prongs. Heart rate is 110 bpm. Arterial blood gas values are PaO2 90 mmHg, PaCO2 32 mmHg, and pH 7.46. If ventilation appears unchanged, which of the following is the most reliable sign of impending respiratory failure?
- (A) PaO2 of 80 mmHg
- (B) PaCO2 of 39 mmHg
- (C) Heart rate of 140 bpm
- (D) Increased wheezing
- (E) Deterioration of mental status