10 Random Questions
In a patient with hypovolemic shock, which of the following factors is the best measure of the overall balance between oxygen supply and demand?
- (A) Arterial oxygen content
- (B) PetO2
- (C) Mixed venous oxygen saturation
- (D) PaO2
- (E) Transcutaneous oxygen tension
When using a Venturi face mask with a reservoir bag
- (A) a known constant FiO2 is delivered
- (B) the reservoir bag ensures predictable FiO2 while conserving fresh gas flow
- (C) low fresh gas flows will not decrease FiO2
- (D) the system prevents hypocarbia during tachypnea
- (E) the system increases anatomic dead space
Compared with a patient without liver disease, a patient with cirrhosis will have
- (A) greater accumulation of vecuronium with infusion
- (B) increased unbound plasma vecuronium concentration
- (C) more frequent occurrence of phase II block after succinylcholine administration
- (D) prolonged elimination half-life of atracurium
- (E) unchanged volume of distribution for pancuronium
During laser microsurgery of the larynx using an endotracheal tube, a fire occurs in the airway. Which of the following is the most appropriate initial management?
- (A) Increase FiO2 to 1.0
- (B) Instill saline into the endotracheal tube
- (C) Perform cricothyroidotomy
- (D) Remove the endotracheal tube
- (E) Ventilate with air
Compared with thiopental, etomidate causes
- (A) greater histamine release
- (B) greater myocardial depression
- (C) greater myoclonic activity
- (D) increased seizure threshold
- (E) less nausea
After receiving excessive intraoperative blood replacement, a patient anesthetized with fentanyl, diazepam, and nitrous oxide develops acute pulmonary edema. The drug most likely to help him acutely is
- (A) isoflurane
- (B) nitroprusside
- (C) digoxin
- (D) nitroglycerin
- (E) furosemide
Which Mapleson breathing circuit shown in the illustration permits the LEAST amount of fresh gas inflow to prevent rebreathing during spontaneous ventilation?
- (A) A
- (B) B
- (C) C
- (D) D
- (E) E
Which of the following fluids will restore circulating blood volume with the smallest infused volume?
- (A) Albumin 25%
- (B) Dextrose 5% in saline solution 0.45%
- (C) Hydroxyethyl starch 6%
- (D) Lactated Ringer's solution
- (E) Type-specific whole blood
Which of the following statements concerning the cerebral effects of barbiturates is true?
- (A) Barbiturate coma produces greater cerebral protection than hypothermia to 17 C
- (B) Barbiturate-induced reduction in cerebral blood flow is greater at normocarbia than at hypocarbia
- (C) Barbiturates decrease the cerebral metabolic rate for oxygen by decreasing cerebral blood flow
- (D) Somatosensory evoked potentials and the EEG are equally sensitive to suppression by barbiturates
- (E) When administered in doses sufficient to produce an isoelectric EEG, barbiturates decrease the cerebral metabolic rate for oxygen by 50%
While delivering nitrous oxide 1.5 L/min, oxygen 1.5 L/min, and sevoflurane 2%, a leak in the oxygen flowmeter would most likely be detected by the
- (A) low airway pressure alarm
- (B) "fail-safe" system
- (C) oxygen analyzer on the expiratory limb
- (D) oxygen flowmeter reading
- (E) mass spectrometric analysis of gases