10 Random Questions
Which of the following will have the LEAST effect on the shape of the autoregulatory curve for cerebral blood flow?
- (A) Isoflurane
- (B) Nitroprusside
- (C) Hypercarbia
- (D) Essential hypertension
- (E) Cerebral infarction
To detect the delivery of a hypoxic gas mixture, the optimal location for an oxygen analyzer in this circle is
- (A) 1
- (B) 2
- (C) 3
- (D) 4
- (E) 5
With direct arterial blood pressure monitoring
- (A) systolic pressure in the aortic root exceeds that in the radial artery
- (B) mean and diastolic pressures are lower in the dorsalis pedis artery than in the aortic root
- (C) the dicrotic notch is not clearly found on femoral arterial waveforms
- (D) an underdamped waveform is characteristic of bubbles in the system
- (E) longer tubing between artery and transducer artifactually augments systolic pressure
Which of the following is the most frequent cause of hemorrhagic diathesis after administration of 20 units of CPD-stored blood over six hours?
- (A) Disseminated intravascular coagulation
- (B) Hypofibrinogenemia
- (C) Low plasma concentrations of factors V and VIII
- (D) Primary fibrinolysis
- (E) Thrombocytopenia
Each of the following can produce adequate analgesia for the first stage of labor EXCEPT
- (A) subarachnoid morphine
- (B) epidural bupivacaine
- (C) pudendal block with lidocaine
- (D) paracervical block with lidocaine
- (E) lumbar sympathetic block with lidocaine
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
A 26-year-old man is in the ICU one hour after sustaining a displaced cervical fracture at the level of C7-8 in a diving accident. Each of the following findings is consistent with this patient's injury EXCEPT
- (A) bilateral paralysis of the vocal cord adductors
- (B) gastric dilatation
- (C) hypotension without tachycardia
- (D) inward movement of the chest with inspiration
- (E) normal tidal volume
During steady-state intraoperative controlled mechanical ventilation, exhaled tidal volume will be increased by
- (A) changing to more compliant tubing in the ventilatory circuit
- (B) increasing fresh gas flow in the anesthesia machine
- (C) increasing nitrous oxide concentration in the inspired mixture
- (D) increasing ventilatory rate
- (E) moving the volume sensor as far as possible from the patient
Which of the following statements concerning the cerebral effects of barbiturates is true?
- (A) Barbiturate coma produces greater cerebral protection than hypothermia to 17 C
- (B) Barbiturate-induced reduction in cerebral blood flow is greater at normocarbia than at hypocarbia
- (C) Barbiturates decrease the cerebral metabolic rate for oxygen by decreasing cerebral blood flow
- (D) Somatosensory evoked potentials and the EEG are equally sensitive to suppression by barbiturates
- (E) When administered in doses sufficient to produce an isoelectric EEG, barbiturates decrease the cerebral metabolic rate for oxygen by 50%
Which of the following is a characteristic of VVI pacemakers?
- (A) They are inhibited by the R wave
- (B) They are triggered by the P wave
- (C) They are more likely to precipitate ventricular fibrillation than fixed-rate pacemakers
- (D) They are unaffected by unipolar electrocautery
- (E) They sense both atrial and ventricular depolarization