10 Random Questions
Compared with labetalol for induction of hypotension, nitroprusside is associated with
- (A) greater cerebral vasodilation
- (B) greater dependence on hepatic metabolism
- (C) less activation of the renin-angiotensin system
- (D) less intrapulmonary shunt
- (E) less venodilation
The Bain circuit
- (A) provides nearly identical delivered and inspired anesthetic concentrations
- (B) has the fresh gas flow inlet near the reservoir bag
- (C) is a nonrebreathing circuit at any fresh gas flow rate
- (D) is most efficient during spontaneous ventilation
- (E) has a time constant greater than 1 minute for change in inspired anesthetic concentrations
Optimal ventilation of a newborn with congenital diaphragmatic hernia should consist of
- (A) PaCO2 30 mmHg, low tidal volumes
- (B) PaCO2 30 mmHg, high tidal volumes
- (C) PaCO2 40 mmHg, low tidal volumes
- (D) PaCO2 40 mmHg, high tidal volumes
- (E) PaCO2 45 mmHg, low tidal volumes
A 55-year-old man has quadriplegia after undergoing suboccipital craniotomy in the sitting position for treatment of acoustic neuroma. Which of the following is the most likely cause?
- (A) Air embolism with the presence of a probe-patent foramen ovale
- (B) Compression of the cervical cord related to neck flexion
- (C) Jugular venous obstruction
- (D) Postoperative tension pneumocephalus
- (E) Sustained elevation of cerebral perfusion pressure
Which of the following is most reliable for treatment of cerebral artery vasospasm associated with subarachnoid hemorrhage?
- (A) Antifibrinolytic therapy
- (B) Hyperventilation
- (C) Mannitol infusion
- (D) Nitroprusside infusion
- (E) Volume expansion
Which of the following factors is the LEAST important determinant of postdural puncture headache?
- (A) Age of the patient
- (B) Gauge of the spinal needle
- (C) Gender of the patient
- (D) Pregnancy
- (E) Time until ambulation
A patient is placed in the prone jackknife position for lumbar subarachnoid injection of tetracaine 10 mg in 10 ml of preservative-free sterile water. Which of the following results is most likely?
- (A) Respiratory insufficiency
- (B) Sensory and motor block at T4-S1
- (C) Sensory and motor block at L1-S5
- (D) Sensory loss without motor block at L1-S5
- (E) Sensory and motor block at S3-S5
Which of the following shaded areas most accurately represents the dead space of a properly functioning circle system?
A normotensive 66-year-old man undergoes total hip arthroplasty. Mean arterial pressure is maintained at 60 mmHg with isoflurane and labetalol; intraoperative FiO2 is 1.0. Eight units of red blood cells are administered intraoperatively because of an injury to the femoral artery. Five days later, the patient develops jaundice. Which of the following is the most likely cause of the jaundice?
- (A) Delayed hemolysis from transfusion
- (B) Heart failure with hepatic congestion
- (C) Hepatocellular injury from labetalol
- (D) Intraoperative hypotension
- (E) Isoflurane-associated hepatitis
Compared with a normal child, which of the following is expected during inhalation induction in a child with a 2:1 left-to-right intracardiac shunt?
- (A) Decreased rate of rise of alveolar anesthetic tension
- (B) Decreased anesthetic concentration in pulmonary artery blood
- (C) Decreased cerebral blood flow
- (D) Increased anesthetic concentration in vena cava blood
- (E) No difference in time for anesthetic induction