Anesthesia Hub -

10 Random Questions

A 157 cm (5 ft 2 in), 180-kg, 40-year-old woman has a PaO2 of 65 mmHg, a PaCO2 of 38 mmHg, and a pH of 7.43 while breathing room air preoperatively. The most likely cause of these values is

(A) decreased hypoxic ventilatory drive
(B) higher than normal oxygen extraction from blood
(C) lower than normal cardiac output
(D) lower than normal functional residual capacity
(E) polycythemia

BASIC Respiratory & Critical Care

Which of the following will occur if the top of the oxygen flowmeter is cracked and leaking during anesthesia with nitrous oxide and oxygen?

(A) The back-pressure check valve will protect against a hypoxic gas mixture
(B) The fail-safe mechanism will protect against a hypoxic gas mixture
(C) The inspired oxygen concentration will be less than that set by the flowmeters
(D) The leak will be detected if the circle is pressurized prior to use
(E) The rotameter will accurately reflect the fresh gas flow to the patient

BASIC Equipment & Physics

In a patient taking a beta-adrenergic blocker, the drug most likely to produce atrioventricular junctional block is

(A) diltiazem
(B) fentanyl
(C) halothane
(D) nifedipine
(E) verapamil

BASIC Pharmacology & Pharmacokinetics

Forty-eight hours after thoracotomy, a patient's T6-7 epidural catheter is removed and the distal 2 cm is noted to be missing. The patient felt no pain during removal and neurologic examination shows no abnormalities. After informing the patient, which of the following is the most appropriate next step in management?

(A) Observation
(B) Culture of cerebrospinal fluid
(C) MRI of the thoracic spine
(D) Myelography
(E) Surgical removal of the catheter

ADVANCED Regional & Pain

Which of the following treatments is LEAST effective in patients with acute herpes zoster?

(A) Acyclovir
(B) Antidepressants
(C) Epidural block
(D) Opioids
(E) Sympathetic nerve block

ADVANCED Regional & Pain

Hyperkalemia in response to the administration of an intubating dose of succinylcholine is associated with each of the following disorders EXCEPT

(A) poliomyelitis
(B) multiple sclerosis
(C) hemiplegia
(D) acute cervical cord transection
(E) familial periodic paralysis

ADVANCED Pharmacology & Pharmacokinetics

Volume-cycled flow generators are preferred over pressure-cycled ventilators in critical care units because they

(A) have a lower compression volume
(B) limit peak airway pressure
(C) maintain constant ventilatory volume with changes in lung compliance
(D) more readily compensate for gas leaks
(E) permit more accurate measurement of the patient's minute volume

A sedative/hypnotic drug is administered prior to electroconvulsive therapy to do which of the following?

(A) Potentiate the effect of succinylcholine
(B) Provide amnesia for the electrical stimulus
(C) Decrease the current required to produce a grand mal seizure
(D) Increase seizure duration
(E) Control postictal sympathetic response

You are called to a witnessed cardiac arrest where cardiopulmonary resuscitation is being performed. After successful intubation, arterial blood gas values are PaO2 86 mmHg, PaCO2 63 mmHg, and pH 7.25 at an FiO2 of 1.0. The most appropriate management at this time is to

(A) repeat arterial blood gas analysis using a new specimen
(B) administer sodium bicarbonate
(C) administer fluid challenge with 500 ml of normal saline solution
(D) hyperventilate the patient
(E) add positive end-expiratory pressure

ADVANCED Respiratory & Critical Care General

During pulmonary artery catheterization, a 65-year-old man receives morphine 6 mg and scopolamine 0.4 mg intravenously. The pulse oximeter indicates desaturation, which quickly resolves with stimulation. When the drapes are removed, he has unilateral eye pain, decreased visual acuity, and dilated and irregular pupils. These eye symptoms are most likely caused by

(A) retinal hemorrhage
(B) morphine-induced oculogyric crisis
(C) corneal abrasion
(D) carotid artery embolization
(E) angle-closure glaucoma

BASIC Pharmacology & Pharmacokinetics