10 Random Questions
A 30-year-old woman undergoes thyroidectomy under general endotracheal anesthesia. Immediately after extubation while breathing spontaneously, she has laryngospasm that resolves after 60 seconds of continuous positive airway pressure applied by face mask. In the PACU, she develops shortness of breath, tachypnea, hypoxemia, and rales. Which of the following is the most likely diagnosis?
- (A) Gastric acid aspiration
- (B) Myocardial infarction
- (C) Pulmonary edema
- (D) Pulmonary embolism
- (E) Vocal cord paralysis
A 2-year-old child has cardiac arrest during an inguinal herniorrhaphy under general anesthesia administered during a Jackson-Rees system. The graph shows end-tidal PCO2 monitored from the tip of the endotracheal tube during cardiopulmonary resuscitation; minute ventilation is unchanged. Which of the following is the most likely cause of the change beginning at the arrow?
- (A) Decreased fresh gas flow
- (B) Inadequate chest compression
- (C) Increased dead space
- (D) Restoration of cardiac output
- (E) Sampling artifact
A 76-year-old patient is restless and hallucinating in the preoperative holding area. He received morphine 5 mg and scopolamine 0.4 mg intramuscularly as premedication and is now breathing oxygen 2 L/min through nasal prongs. SpO2 is 98%. Which of the following is the most appropriate next step?
- (A) Administration of naloxone
- (B) Administration of physostigmine
- (C) Induction of general anesthesia
- (D) Determination of serum electrolyte concentrations
- (E) CT scan of the head
A 5-year-old child undergoes strabismus correction during spontaneous ventilation with halothane 1.5%, nitrous oxide and oxygen 50%. Intravenous atropine 0.2 mg is administered after inhalation induction. Ten minutes after incision, heart rate decreases from 110 bpm to 40 bpm. Which of the following is the most likely cause?
- (A) Administration of phenylephrine eyedrops
- (B) Inadvertent external pressure on the carotid sinus
- (C) Paradoxical response to a small dose of atropine
- (D) Sinoatrial nodal depression by halothane
- (E) Traction on an extraocular muscle
A 55-year-old woman receiving chronic dialysis for renal failure comes to the emergency department with a perforated viscus. She has chest pain. Heart rate is 124 bpm, blood pressure is 90/60 mmHg, and respiratory rate is 18/min. Surgery is to be performed within the hour. Which of the following best describes this patient's ASA physical status classification?
- (A) III
- (B) III E
- (C) IV
- (D) IV E
- (E) V E
The use of droperidol as a preanesthetic medication has been associated with each of the following EXCEPT
- (A) acute anxiety
- (B) anterograde amnesia
- (C) hypotension
- (D) extrapyramidal signs
- (E) catalepsy
A 13-year-old African American boy has severe abdominal pain after debridement of an open fracture of the lower extremity. His hemoglobin concentration is 10 g/dl and a peripheral blood smear shows elongated crescent-shaped erythrocytes. The most appropriate initial therapy is
- (A) sodium bicarbonate administration
- (B) dopamine infusion
- (C) blood transfusion
- (D) volume loading with crystalloid
- (E) high-dose corticosteroid administration
After removing the electrocautery pad from the thigh, a burn is noted at that site. Which of the following most likely contributed to this injury?
- (A) A line-isolation monitor fault
- (B) Current leak from the EKG module
- (C) Defective grounding of the electrocautery unit
- (D) Dried gel on the electrocautery pad
- (E) Excessive current setting for cutting mode
Which of the following premedicant drug combinations is most effective in preventing passive regurgitation during anesthesia?
- (A) Cimetidine and glycopyrrolate
- (B) Metoclopramide and atropine
- (C) Metoclopramide and ranitidine
- (D) Metoclopramide, atropine, and ranitidine
- (E) Metoclopramide and sodium bicitrate
A patient suddenly makes a respiratory effort during craniotomy for clipping of a cerebral aneurysm in a 15-degree head-up position with controlled ventilation. The most likely cause is
- (A) air embolism
- (B) cerebral hypoxia
- (C) direct stimulation of the respiratory center
- (D) intraventricular hemorrhage
- (E) stimulation of the motor cortex