Anesthesia Hub -

10 Random Questions

A 15-kg, 3-year-old child is anesthetized for an inguinal hernia repair with halothane and nitrous oxide. The trachea is intubated after administration of succinylcholine 30 mg. At the conclusion of the 45-minute procedure, the child is not breathing; a peripheral nerve twitch monitor indicates no response to a train-of-four stimulus. Further investigation is most likely to show

(A) abnormal response to nondepolarizing muscle relaxants
(B) a low dibucaine number
(C) a low plasma cholinesterase concentration
(D) an underlying myopathy
(E) a positive halothane-caffeine contracture test

ADVANCED Pharmacology & Pharmacokinetics Pediatric

Which of the following is the most common cause of coagulopathy occurring during massive blood transfusion?

(A) Decreased serum fibrinogen concentration
(B) Decreased serum ionized calcium concentration
(C) Dilutional thrombocytopenia
(D) Disseminated intravascular coagulation
(E) Hypothermia

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

Which of the following statements concerning carbon monoxide poisoning is true?

(A) Diagnosis is excluded if the PaO2 is greater than 300 mmHg while breathing 100% oxygen
(B) Increased inspired oxygen concentration accelerates displacement of carbon monoxide from hemoglobin
(C) Methylene blue decreases binding of carbon monoxide to hemoglobin
(D) Pulse oximetry accurately reflects hemoglobin oxygen saturation
(E) Tissue oxygen delivery is normal

ADVANCED Respiratory & Critical Care General

Delirium produced by high doses of atropine can be reversed by intravenous injection of

(A) diphenhydramine
(B) flumazenil
(C) naloxone
(D) neostigmine
(E) physostigmine

BASIC Pharmacology & Pharmacokinetics

After a gastric stapling procedure, a 150-kg woman is extubated and breathing spontaneously in the recovery room at a rate of 26/min and an FiO2 of 0.5. Arterial blood gas analysis shows PaO2 96 mmHg, PaCO2 44 mmHg, and pH 7.37. The parameter most closely related to her increased alveolar-arterial oxygen tension gradient is

(A) decreased expiratory reserve volume
(B) decreased minute volume
(C) decreased residual volume
(D) decreased total lung capacity
(E) rapid respiratory rate

BASIC Respiratory & Critical Care

The muscular action most likely to remain intact following an axillary brachial plexus block is

(A) flexion at the elbow
(B) extension at the wrist
(C) flexion of digits 3, 4, and 5
(D) extension of digits 1, 2, and 3
(E) extension at the elbow

ADVANCED Regional & Pain

A newborn is in respiratory distress. Examination shows a scaphoid abdomen, cyanosis while breathing oxygen by mask, and heart sounds in the right hemithorax. Which of the following is the most appropriate next step?

(A) Assisted ventilation with a bag and face mask
(B) Insertion of a chest tube on the left side
(C) Insertion of a nasogastric tube
(D) Tracheal intubation and assisted ventilation
(E) Tracheal intubation and expansion of the left lung

ADVANCED Pediatric

A 30-year-old woman develops urticaria immediately after administration of 2% 2-chloroprocaine for removal of a nevus on the chest wall. This reaction resolves with administration of diphenhydramine and the surgery is rescheduled. During the second procedure, a field block is performed using 10 ml of 1% lidocaine from a multidose vial. Within 10 minutes the patient develops urticaria and wheezing and has difficulty breathing. These symptoms resolve with administration of epinephrine. Which of the following substances is the most likely cause of these reactions?

(A) A paraben derivative
(B) Povidone-iodine
(C) Ethylenediaminetetraacetic acid (EDTA)
(D) Propylene glycol
(E) Sodium bisulfite

When compared with a healthy 30-year-old man, which of the following respiratory parameters is decreased in an otherwise healthy 80-year-old man?

(A) Alveolar to arterial oxygen gradient
(B) Lung compliance
(C) Ratio of functional residual capacity to total lung capacity
(D) Resting tidal volume
(E) Ventilatory response to carbon dioxide

BASIC Respiratory & Critical Care