10 Random Questions
Two opened oxygen cylinders, one full and one empty, are attached to an anesthesia machine. The check valve to the empty cylinder fails. This is expected to result in
- (A) activation of the fail-safe device
- (B) cessation of oxygen flow to the anesthesia circuit
- (C) filling of the empty cylinder with a mixture of all gases supplied to the anesthesia machine
- (D) increase in the temperature of the empty cylinder
- (E) interruption of gas delivery from the central oxygen source
During induced hypotension for clipping of a cerebral aneurysm in a 20-degree head-up position, the arterial pressure transducer should be zero referenced at which level?
- (A) External auditory meatus
- (B) Midaxillary line at the fifth intercostal space
- (C) Sternal notch
- (D) Thyroid cartilage
- (E) Top of the cranium
The ECG tracing shows
- (A) aberrant intraventricular conduction
- (B) acceleration of phase 4 depolarization of the sinus node
- (C) a compensatory pause
- (D) initiation of re-entrant supraventricular tachycardia
- (E) paroxysmal atrial fibrillation
Which of the following muscle relaxants in an ED95 dose would have the longest duration of action in a patient with renal failure?
- (A) Atracurium
- (B) Metocurine
- (C) Pancuronium
- (D) d-Tubocurarine
- (E) Vecuronium
Which of the following statements concerning anesthesia machine flowmeters is true?
- (A) At high gas flows, viscosity is the predominant determinant of flow rate
- (B) At low flow rates, gas density is the predominant determinant of flow rate
- (C) Flowmeters should be upstream from the oxygen fail-safe device
- (D) The oxygen flowmeter should be upstream from other flowmeters
- (E) Tapered flow tubes allow a constant decrease in pressure across the float
In the diagram, point "X" represents a patient with severe left ventricular dysfunction. The points labeled 1, 2, and 3 each represent the results of a different therapeutic intervention. Which of the following represents the most likely intervention at each point?
- (A) 1-Dopamine, 2-Furosemide, 3-Nitroprusside
- (B) 1-Dopamine, 2-Nitroprusside, 3-Furosemide
- (C) 1-Furosemide, 2-Dopamine, 3-Nitroprusside
- (D) 1-Nitroprusside, 2-Dopamine, 3-Furosemide
- (E) 1-Nitroprusside, 2-Furosemide, 3-Dopamine
A successful ankle block for transmetatarsal amputation of the first and second toes should include each of the following nerves EXCEPT the
- (A) saphenous
- (B) deep peroneal
- (C) superficial peroneal
- (D) sural
- (E) tibial
Electrocautery units operate at frequencies between 300 kHz and 2 mHz to
- (A) avoid pacemaker interference
- (B) minimize ECG tracing interference
- (C) minimize the likelihood of ventricular fibrillation
- (D) optimize hemostasis
- (E) provide the best "cutting" current
Which of the following statements concerning cerebral blood flow (CBF) during anesthesia is true?
- (A) CBF changes minimally when PaC02 increases from 30 to 40 mmHg
- (B) CBF changes minimally when P02 decreases from 160 to 100 mmHg
- (C) CBF is autoregulated when mean arterial pressure is 40 mmHg
- (D) CBF is coupled to cerebral metabolism during isoflurane anesthesia
- (E) CBF is unaffected by 1.2% isoflurane at a PaC02 of 40 mmHg
Properly performed local anesthetic block of the celiac plexus
- (A) requires that the needle tip be positioned anterior to the vertebral body of LI
- (B) preserves efferent parasympathetic outflow
- (C) produces urinary retention
- (D) is not associated with hypotension
- (E) produces truncal cutaneous hypesthesia