10 Random Questions
The supine hypotensive syndrome of pregnancy
- (A) begins at 32 weeks' gestation
- (B) causes fetal distress by aortocaval compression
- (C) is corrected by Trendelenburg's position
- (D) is less likely following subarachnoid block than epidural block
- (E) occurs in 90% of supine women at 38 to 40 weeks' gestation
A 24-year-old man who sustained multiple rib fractures in a motor vehicle accident has air leaks through bilateral chest tubes. Which of the following is most likely following initiation of high-frequency jet ventilation?
- (A) Airway pressure will be measured most reliably at the proximal (external) end of the endotracheal tube
- (B) Atelectatic areas of the lungs will re-expand
- (C) Changes in end-tidal carbon dioxide tension measured at the tip of the endotracheal tube will match changes in PaCOz
- (D) Hypercarbia will develop
- (E) The air leaks will be proportional to peak airway pressure
After weaning from cardiopulmonary bypass following mitral valve replacement, a patient's cardiac output is reported to be 3.7 L/min measured by thermodilution technique using 5% dextrose in water 10 ml at room temperature as injec-tate. This value could be falsely high if
- (A) normal saline solution were mistakenly used
- (B) the patient's hematocrit were still 25%
- (C) only 9.0 ml of injectate were used
- (D) atrial fibrillation were present
- (E) the room were excessively cold
Local anesthetics block nerve conduction by
- (A) closing calcium channels
- (B) decreasing intracellular calcium concentration
- (C) decreasing potassium conductance
- (D) causing extrusion of intracellular potassium
- (E) inhibiting cellular influx of sodium
Following axillary block for insertion of an arteriovenous fistula in the forearm, a patient has pain on surgical incision. Which of the following nerves should be blocked to relieve this pain?
- (A) Axillary
- (B) Median
- (C) Musculocutaneous
- (D) Radial
- (E) Ulnar
The most likely cause of a fetal heart rate pattern of variable decelerations to 90 bpm is
- (A) aortocaval compression
- (B) compression of the fetal head
- (C) fetal acidosis
- (D) maternal hypotension
- (E) umbilical cord compression
Which of the following nerves is most likely to be injured by a fracture of the shaft of the humerus?
- (A) Axillary
- (B) Median
- (C) Musculocutaneous
- (D) Radial
- (E) Ulnar
The tracing indicates that the pacemaker generator is
- (A) malfunctioning
- (B) VVT sensing and capturing normally
- (C) VOO sensing and capturing normally
- (D) DVI sensing and capturing normally
- (E) VVI sensing and capturing normally
You are asked to evaluate a 2000-g male infant three hours after vaginal delivery because of a respiratory rate of 50/min, pulse rate of 115 bpm, and the following arterial blood gas values while breathing room air: PaO2 64 mmHg, PaCO2 43 mmHg, and pH 7.33. His mother received meperidine 75 mg two hours before delivery. Appropriate management includes
- (A) administration of naloxone 50 mcg intramuscularly
- (B) increasing the FiO2 to 0.4
- (C) intubation and mechanical ventilation at an FiO2 of 0.5
- (D) administration of oxygen 50% with 5 cm H2O continuous positive airway pressure
- (E) observation, with no action at present
Bronchospasm occurring during anesthesia in a patient with an ileal carcinoid is best treated by administration of
- (A) aminophylline
- (B) dexamethasone
- (C) halothane
- (D) ketamine
- (E) somatostatin