Anesthesia Hub -

10 Random Questions

Which of the following is most responsible for the duration of action of local anesthetics?

(A) Concentration
(B) Metabolism
(C) Molecular weight
(D) Tissue protein binding
(E) Volume injected

BASIC Pharmacology & Pharmacokinetics Regional & Pain

The second gas effect refers to

(A) acceleration of rise in alveolar concentration of a gas caused by concomitantly administered nitrous oxide
(B) change in volatile anesthetic vaporizer output with the addition of nitrous oxide to the carrier gas mixture
(C) decrease in MAC of a volatile anesthetic by addition of nitrous oxide
(D) expansion of gas-containing spaces by addition of nitrous oxide
(E) rapid diffusion of nitrous oxide from pulmonary capillary blood into alveolar gas at the termination of anesthesia

During axillary block of the brachial plexus, which nerve is most likely to be encountered if the needle is inserted through the posterior wall of the artery?

(A) Intercostobrachial
(B) Median
(C) Musculocutaneous
(D) Radial
(E) Ulnar

ADVANCED Regional & Pain

A 75-year-old man with aortic stenosis and coronary artery disease has a preinduction heart rate of 68 bpm and blood pressure of 125/70 mmHg. After induction of anesthesia with fentanyl, midazolam, and pancuronium, heart rate is 90 bpm and blood pressure is 85/45 mmHg. ECG shows a new ST-segment elevation in lead II. Which of the following is the most appropriate initial management?

(A) Ephedrine
(B) Epinephrine
(C) Esmolol
(D) Nitroglycerin
(E) Phenylephrine

ADVANCED General

Which of the following should be included in the preoperative management of a 12-year-old patient with Duchenne muscular dystrophy who is unable to ambulate?

(A) Determination of serum creatine kinase concentration
(B) Determination of serum potassium concentration
(C) Liver function profile
(D) Echocardiography
(E) Dantrolene prophylaxis

ADVANCED Pediatric

An anesthesia machine is set to deliver oxygen 2 L/min, nitrous oxide 2 L/min, and sevoflurane. After 30 minutes of stable anesthesia, which of the following, is the most likely cause of a decrease in the oxygen analyzer reading from 50% to 30%?

(A) A leak in the ventilator bellows
(B) Accumulation of water on the oxygen sensor membrane
(C) Calibration at 100% oxygen using less than 100% oxygen
(D) Disconnection of the wall oxygen hose
(E) Presence of the oxygen analyzer in the expiratory limb

BASIC Equipment & Physics

A patient has pain in the left thoracic wall associated with metastatic rib lesions. An intrathecal neurolytic block with 6% phenol in glycerin is planned for pain relief. Prior to performing the block, the patient should be placed in which of the following positions?

(A) Left lateral semisupine
(B) Right lateral semisupine
(C) Left lateral semiprone
(D) Right lateral semiprone
(E) Prone

ADVANCED Regional & Pain

Which of the following is the most likely effect of long-term exposure to nitrous oxide at a concentration of 50 ppm?

(A) Impaired cognitive function
(B) Inhibition of vitamin B-12 absorption
(C) Megaloblastic changes in bone marrow
(D) Teratogenesis
(E) Thrombocytopenia

Which of the following spirometric tests is most likely to be accurate in a patient with severe pain?

(A) Forced expiratory volume in one second
(B) Peak expiratory flow rate
(C) Maximum midexpiratory flow
(D) Maximum breathing capacity
(E) Negative inspiratory pressure

BASIC Respiratory & Critical Care Regional & Pain

Deliberate hypothermia and circulatory arrest is planned for clipping of a giant basilar artery aneurysm. Which of the following statements is true?

(A) Administration of a muscle relaxant slows the cooling process
(B) Anesthesia is not required if body temperature is below 31°C
(C) Decreasing body temperature below the level at which the EEG is isoelectric further decreases cerebral metabolic rate for oxygen
(D) Sinus bradycardia during cooling results from increased intracranial pressure
(E) T-wave inversion during cooling indicates myocardial ischemia

ADVANCED Neuro