10 Random Questions
A patient who is receiving ventilatory support after coronary artery bypass grafting has a PaO2 of 132 mmHg, a PaCO2 of 19 mmHg, and a pH of 7.57. Which of the following is most likely to result from this level of hypocarbia?
- (A) Decreased airway resistance
- (B) Increased myocardial contractility
- (C) Hyperkalemia
- (D) Shortened QT interval
- (E) Cerebral ischemia
Systemic hypothermia to 30°C is accompanied by
- (A) a shift to the right of the oxyhemoglobin dissociation curve
- (B) a decrease in carbon dioxide dissolved in plasma
- (C) a decrease in the glomerular filtration rate
- (D) an increase in MAC of volatile inhalation agents
- (E) low-voltage, high-frequency EEG pattern
The graphs shown illustrate various respiratory patterns in a patient who is breathing spontaneously with continuous positive airway pressure. Which of the following patterns is associated with the LEAST work of breathing?
- (A) 1
- (B) 2
- (C) 3
- (D) All patterns are associated with equal work
- (E) There is not enough information to answer the question
Which of the following is the most appropriate treatment of methemoglobinemia prior to emergency surgery?
- (A) Hydroxocobalamin
- (B) Methylene blue
- (C) Oxygen by face mask
- (D) Packed red blood cells
- (E) Thiosulfate
Diffuse microvascular bleeding is noted in a patient who has received 25 units of whole blood for a liver resection. Platelet count is 40,000/mm3, prothrombin time is 18 sec, activated partial thromboplastin time is 54 sec, and serum fibrinogen concentration is 60 mg/dl. The most likely cause of the bleeding is
- (A) abnormal platelet function
- (B) citrate toxicity
- (C) depressed levels of factors V and VIII
- (D) dilutional thrombocytopenia
- (E) disseminated intravascular coagulation
A patient has tonic movements of the head and neck, nystagmus, and slurred speech after receiving metoclopramide for nausea after nitrous oxide-opioid anesthesia. The most appropriate pharmacologic treatment is
- (A) diphenhydramine
- (B) midazolam
- (C) naloxone
- (D) phenytoin
- (E) physostigmine
Proper handling of oxygen cylinders includes
- (A) maintenance of storage room temperature above 60°F
- (B) separate storage rooms for nitrous oxide and oxygen
- (C) opening the cylinder valve just sufficiently to register tank pressure accurately
- (D) storage in a room with conductive flooring
- (E) opening the cylinder valve briefly before attachment to the anesthesia machine
A sensory level of T2 is achieved after administration of spinal anesthesia. Which of the following lung volumes is LEAST likely to be affected?
- (A) Expiratory reserve volume
- (B) Inspiratory reserve volume
- (C) Inspiratory capacity
- (D) Tidal volume
- (E) Vital capacity
During induction of anesthesia in a 70-year-old man with aortic stenosis, the blood pressure decreases from 140/ 80 to 70/45 mmHg as the cardiac rhythm changes from normal sinus at 70 bpm to junctional at 120 bpm. The most appropriate initial therapy would be
- (A) cardioversion
- (B) esmolol
- (C) fluid bolus
- (D) phenylephrine
- (E) verapamil
Bronchospasm occurring during anesthesia in a patient with an ileal carcinoid is best treated by administration of
- (A) aminophylline
- (B) dexamethasone
- (C) halothane
- (D) ketamine
- (E) somatostatin