Anesthesia Hub -

10 Random Questions

Which of the following is the most appropriate action after an anesthetic vaporizer is tipped?

(A) Return to the manufacturer for recalibration
(B) Flush the vaporizer with oxygen at 5 L/min for 24 hours
(C) Store the vaporizer for 24 hours at room temperature
(D) Set the vaporizer at low concentration and flush with oxygen at 10 L/min for 30 minutes
(E) Verify the vaporizer output with mass spectrography

BASIC Equipment & Physics

During an aortic aneurysm repair, end-tidal carbon dioxide tension decreases from 35 to 20 mmHg in three breaths. The most likely cause is

(A) acute arteriovenous fistula
(B) bronchospasm
(C) decreased cardiac output
(D) increased tidal volume
(E) venous air embolism

To predict the requirement for isoflurane in milliliters of vapor per minute during closed circuit anesthesia, each of the following is necessary EXCEPT

(A) cardiac output
(B) oxygen consumption
(C) MAC of isoflurane
(D) duration of administration
(E) blood-gas partition coefficient

BASIC Pharmacology & Pharmacokinetics

Maternal hyperventilation to a PaCO2 of 20 mmHg during labor can result in

(A) decreased fetal trapping of local anesthetics
(B) fetal metabolic acidosis
(C) fetal respiratory acidosis
(D) increased oxygen release at the placenta
(E) uterine vasodilation

ADVANCED OB

Carbon dioxide retention first occurs when the ratio of forced expiratory volume in 1 second to vital capacity (FEV1/VC) decreases below

(A) 15%
(B) 35%
(C) 50%
(D) 65%
(E) 75%

BASIC Respiratory & Critical Care

In a healthy 70-kg adult, which of the following is the most likely effect of intravenous administration of morphine 10 mg on ventilatory responses?

(A) Increased response to hypoxia and decreased response to hypercarbia
(B) Decreased response to hypercarbia and no change in response to hypoxia
(C) Decreased response to both hypoxia and hypercarbia
(D) No change in response to hypercarbia and decreased response to hypoxia
(E) No change in response to hypoxia or hypercarbia

A 50-year-old man with alcoholism and jaundice is scheduled to undergo umbilical herniorrhaphy. An increase in which of the following best indicates impaired synthetic hepatic function?

(A) Prothrombin time
(B) Serum alanine aminotransferase concentration
(C) Serum albumin/globulin ratio
(D) Serum alkaline phosphatase concentration
(E) Serum bilirubin concentration

BASIC General

Which of the following is a characteristic of VVI pacemakers?

(A) They are inhibited by the R wave
(B) They are triggered by the P wave
(C) They are more likely to precipitate ventricular fibrillation than fixed-rate pacemakers
(D) They are unaffected by unipolar electrocautery
(E) They sense both atrial and ventricular depolarization

Epidural block is safer at the L3-L4 interspace than at the T12-L1 interspace because of the location of the

(A) anterolateral epidural veins
(B) inferior border of the cauda equina
(C) inferior border of the conus medullaris
(D) inferior border of the subarachnoid space
(E) blood supply to the anterior spinal cord

BASIC Regional & Pain

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