10 Random Questions
After inflation of both the tracheal and endobronchial cuffs of a left-sided double-lumen tube, the following are noted on auscultation of the chest: Left lumen clamped --> Breath sounds absent bilaterally; Right lumen clamped --> Breath sounds present on left only; Both lumens open --> Breath sounds present on left only. The most appropriate action is to
- (A) decrease the endobronchial cuff volume
- (B) decrease the tracheal cuff volume
- (C) reinsert the tube, rotating it 180 degrees to the right
- (D) suction both lumens
- (E) withdraw the tube slightly and repeat the auscultory maneuvers
If administered prior to induction of anesthesia, which of the following drugs is most likely to cause tachycardia?
- (A) Fentanyl
- (B) Meperidine
- (C) Midazolam
- (D) Morphine
- (E) Sufentanil
Leakage current and microshock hazards are eliminated by
- (A) an isolation transformer
- (B) conductive flooring
- (C) a three-wire grounding system
- (D) a line-isolation monitor
- (E) none of the above
Hemodilution is used during profound hypothermic cardiopulmonary bypass primarily because it
- (A) decreases cold-induced coagulopathy
- (B) decreases edema formation
- (C) increases oxygen-carrying capacity of plasma
- (D) increases oxygen dissociation from hemoglobin
- (E) limits the cold-induced increase in blood viscosity
A patient is undergoing a craniotomy in the sitting position. Mean arterial pressure measures 80 mmHg from a radial artery catheter located 27 cm below the right atrium and a transducer located, zeroed, and calibrated at the level of the right atrium. The circle of Willis is 27 cm above the right atrium. Intracranial pressure is 0 cmH20 and right atrial pressure is 5 cmH20. The cerebral perfusion pressure in mmHg is
- (A) 75
- (B) 60
- (C) 53
- (D) 48
- (E) 26
After two hours of anesthesia with halothane 1.2% and oxygen, nitrous oxide 75% is added to the inspired gas mixture. This addition would
- (A) increase the alveolar halothane and oxygen concentrations above inspired
- (B) increase the alveolar halothane concentration only
- (C) cause no change in alveolar gas concentrations compared with inspired
- (D) decrease alveolar oxygen concentration compared with inspired
- (E) decrease alveolar oxygen and halothane concentrations below inspired
Depression of cerebral oxygen requirements below the level required to create an isoelectric EEG can be achieved by
- (A) administration of isoflurane
- (B) administration of nimodipine
- (C) barbiturate coma
- (D) hyperventilation
- (E) hypothermia
Which of the following decreases dead space in an anesthetic circle system?
- (A) Larger surface area of the expiratory unidirectional valve
- (B) Placing a septum in the Y-piece
- (C) Shorter expiratory limb tubing
- (D) Smaller carbon dioxide absorber
- (E) Smaller reservoir bag
A 30-year-old man who is breathing spontaneously has a ventilatory pattern of sustained deep inspiration and occasional expiratory gasps during emergence from general anesthesia after posterior fossa craniotomy. Which of the following is the most likely cause?
- (A) Air in the cerebral ventricles
- (B) Expiratory obstruction from subglottic edema
- (C) Injury to the C3-5 nerve roots
- (D) Injury to the pons
- (E) Residual neuromuscular paralysis
The cardiac rhythm illustrated appeared suddenly in an anesthetized patient. The most appropriate management is
- (A) administration of adenosine
- (B) administration of digoxin
- (C) administration of epinepherine
- (D) overdrive pacing
- (E) synchronous cardioversion