10 Random Questions
Compared with adults, neonatal respiratory function is characterized by
- (A) a lower ratio of dead space to tidal volume
- (B) a more compliant chest wall
- (C) a more positive intrapleural pressure at end-expiration
- (D) less susceptibility to atelectasis
- (E) the same oxygen requirement per kilogram of body weight
Which of the following statements concerning carbon monoxide poisoning is true? A 38-year-old woman with a large goiter has undergone subtotal thyroidectomy. Airway obstruction is noted immediately after extubation despite normal vocal cord function on laryngoscopy. Which of the following is the most likely explanation?
- (A) Arytenoid dislocation
- (B) Hematoma
- (C) Hypocalcemia
- (D) Recurrent laryngeal nerve injury
- (E) Tracheomalacia
Numbness and tingling on the lateral aspect of the thigh 24 hours after uneventful vaginal delivery is most likely a complication of
- (A) forceps delivery
- (B) lithotomy position
- (C) pudendal nerve block
- (D) lumbar epidural anesthesia
- (E) spinal anesthesia
The ECG tracing shows
- (A) aberrant intraventricular conduction
- (B) acceleration of phase 4 depolarization of the sinus node
- (C) a compensatory pause
- (D) initiation of re-entrant supraventricular tachycardia
- (E) paroxysmal atrial fibrillation
A patient develops urticaria and pruritus while receiving a blood transfusion in the PACU. Blood pressure and heart rate are unchanged from pretransfusion values. The most appropriate action is administration of
- (A) diphenhydramine
- (B) epinephrine
- (C) furosemide
- (D) hydrocortisone
- (E) mannitol
In the PACU after resection of an occipital astrocytoma, a patient has a urine output greater than 300 ml/hr, serum osmolality of 310 mOsm/L, and a hematocrit of 40% (equal to the preoperative value). Intraoperative blood loss was estimated to be 750 ml; furosemide and mannitol were administered during the procedure. The most appropriate next step is
- (A) restriction of free water
- (B) administration of 0.9% saline solution
- (C) administration of desmopressin
- (D) administration of dexamethasone
- (E) CT scan of the brain
Which of the following combinations of hemoglobin, blood gases, and cardiac output provides the greatest delivery of oxygen to tissue? (Hb, PaO2, SaO2, CO)
- (A) 7.0 85 95 7.0
- (B) 8.0 290 100 8.0
- (C) 9.9 61 90 9.8
- (D) 12.0 140 100 4.5
- (E) 16.0 40 75 5.8
Alveolar stability at varying lung volumes is maintained by
- (A) constant surface tension
- (B) increased surface tension at low lung volume
- (C) decreased surface tension at high lung volume
- (D) decreased surface tension at low lung volume
- (E) none of the above
The most common clinical viral infection following homologous blood transfusion is caused by
- (A) cytomegalovirus
- (B) Epstein-Barr virus
- (C) hepatitis B virus
- (D) human immunodeficiency virus
- (E) non-A, non-B hepatitis virus
Long-term use of cimetidine is associated with
- (A) delayed emergence after thiopental induction
- (B) increased hypotension after morphine
- (C) increased risk for isoflurane-induced nephrotoxicity
- (D) prolonged action of succinylcholine
- (E) prolonged sedation with diazepam