10 Random Questions
An otherwise healthy 70-year-old man receives 12 units of packed red blood cells for persistent diffuse bleeding during suprapubic prostatectomy. Hemoglobin concentration is 11 g/dL, platelet count is 55,000/mm3, plasma fibrinogen concentration is 180 mg/dL, protime is 14 sec, and partial thromboplastin time is 35 sec. The most appropriate therapy is administration of
- (A) cryoprecipitate
- (B) desmopressin (DDAVP)
- (C) epsilon-aminocaproic acid
- (D) fresh frozen plasma
- (E) platelets
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
A healthy, spontaneously breathing, supine, anesthetized patient has a PaCO2 to PetCO2 difference of 3 mmHg. Following institution of mechanical ventilation the value increases to 12 mmHg. The most likely cause of this change is
- (A) cephalad displacement of the diaphragm
- (B) decreased production of carbon dioxide
- (C) increased cardiac output
- (D) increased shunting of blood through dependent lung zones
- (E) increased ventilation of nondependent lung zones
Which of the following findings best indicates complete resolution of spinal anesthesia?
- (A) Ability to ambulate
- (B) Ability to urinate
- (C) Perianal pinprick sensation
- (D) Pain at the surgical site
- (E) Proprioception of the big toe
Spinal anesthesia at a T6 sensory level is most likely to improve cardiac output in patients with
- (A) aortic stenosis
- (B) asymmetric septal hypertrophy (IHSS)
- (C) chronic constrictive pericarditis
- (D) cor pulmonale
- (E) mitral regurgitation
The primary mechanism for respiratory arrest following a spinal anesthetic to T2 is
- (A) block of carotid chemoreceptors
- (B) direct effect of local anesthetic on the medulla
- (C) ischemia of respiratory centers in the medulla
- (D) paralysis of the diaphragm by neural block
- (E) paralysis of intercostal muscles
The second gas effect refers to
- (A) acceleration of rise in alveolar concentration of a gas caused by concomitantly administered nitrous oxide
- (B) change in volatile anesthetic vaporizer output with the addition of nitrous oxide to the carrier gas mixture
- (C) decrease in MAC of a volatile anesthetic by addition of nitrous oxide
- (D) expansion of gas-containing spaces by addition of nitrous oxide
- (E) rapid diffusion of nitrous oxide from pulmonary capillary blood into alveolar gas at the termination of anesthesia
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
Electrocautery units operate at frequencies between 300 kHz and 2 mHz to
- (A) avoid pacemaker interference
- (B) minimize ECG tracing interference
- (C) minimize the likelihood of ventricular fibrillation
- (D) optimize hemostasis
- (E) provide the best "cutting" current
A Fluotec vaporizer is set to administer halothane 4% using a fresh gas flow of 4 L/min. If the diluent gas flow is increased to 8 L/min, and at the same time the room temperature increases from 20 to 25°C, the approximate concentration of halothane delivered to the patient would be
- (A) 2%
- (B) 2.5%
- (C) 3%
- (D) 4%
- (E) 5%