Anesthesia Hub -

10 Random Questions

During therapy for eclampsia, toxic blood levels of magnesium sulfate can be distinguished from therapeutic levels by the presence of

(A) diminished knee jerk reflex
(B) a widened QRS complex on EKG
(C) fetal tachycardia
(D) maternal drowsiness
(E) uterine rigidity

ADVANCED Pharmacology & Pharmacokinetics OB

At the end of an anesthetic in which a nondepolarizing muscle relaxant was administered, the least number of receptors are blocked

(A) after administration of neostigmine 5 mg and glycopyrrolate 1 mg
(B) if the tetanus is sustained at 30 Hz
(C) if the patient can sustain head lift for 5 sec
(D) when the ratio of twitch height T1:T4 is 0.8
(E) when tidal volume is normal

BASIC Pharmacology & Pharmacokinetics

Compared with the demand-flow intermittent mandatory ventilation (IMV) system, the continuous-flow IMV system has which of the following characteristics?

(A) It cannot be used with positive end-expiratory pressure
(B) It permits monitoring of exhaled tidal volume
(C) It decreases waste of medical gases
(D) It decreases the work of breathing
(E) It synchronizes mechanical and spontaneous breaths

Which of the following correctly describes the anatomic location of the stellate ganglion?

(A) Anterior to the transverse process of C5
(B) Anterior to the transverse process of C7
(C) Posterior to the prevertebral fascia
(D) Posterior to the vertebral artery
(E) Lateral to the carotid artery

ADVANCED Regional & Pain

Three hours after undergoing coronary artery bypass grafting, an elderly man develops severe hypotension after intravenous administration of morphine 4 mg. Pulmonary artery occlusion pressure is 27 mmHg and central venous pressure is 30 mmHg. Transesophageal echocardiography shows decreased end-diastolic ventricular volumes. Which of the following is the most likely diagnosis?

(A) Anaphylactoid reaction
(B) Cardiac tamponade
(C) Coronary graft occlusion
(D) Excessive fluid administration
(E) Pulmonary thromboembolus

ADVANCED Cardiac

Five minutes after a stellate ganglion block is performed, a patient becomes restless, then apneic. The most likely cause is

(A) paratracheal hematoma
(B) phrenic nerve block
(C) recurrent laryngeal nerve block
(D) subarachnoid injection
(E) vertebral artery injection

ADVANCED Regional & Pain

Each of the following changes is expected with deliberate hypothermia EXCEPT

(A) decreased unloading of oxygen from hemoglobin
(B) a 5% decrease in MAC for each 1°C decrease in temperature
(C) increased arterial oxygen and carbon dioxide contents
(D) a 50% decrease in cerebral metabolic rate at 28°C
(E) spike and dome EEG activity at temperatures below 30°C

BASIC General Cardiac

Following maternal epidural injection, fetal exposure to chloroprocaine is lower than fetal exposure to bupivacaine for which of the following reasons?

(A) Chloroprocaine is metabolized by plasma cholinesterase
(B) Chloroprocaine is more protein bound
(C) Chloroprocaine is not readily absorbed from the epidural space
(D) The ionized fraction of chloroprocaine in the fetal circulation is smaller
(E) The pKa of chloroprocaine is less than that of bupivacaine

ADVANCED Pediatric OB

An adult patient with atrial fibrillation develops pulseless ventricular tachycardia wfiile undergoing synchronized electirical cardioversion. Which of the following is the most appropriate management?

(A) Intravenous administration of adenosine
(B) Intravenous administration of a bolus of lidocaine followed by electrical cardioversion
(C) Immediate repeat synchronized cardioversion at the same energy level
(D) Immediate repeat synchronized cardioversion at twice the previous energy level
(E) Unsynchronized electrical cardioversion

BASIC General Cardiac

A 26-year-old woman has persistent uterine bleeding following a normal spontaneous delivery without anesthesia. The uterus is firm on manual examination. Which of the following anesthetics is most appropriate for manual extraction of the placenta?

(A) Halothane
(B) Pudendal block with lidocaine
(C) Subarachnoid tetracaine
(D) Thiopental
(E) Vecuronium