10 Random Questions
Which of the following is the most likely effect of long-term exposure to nitrous oxide at a concentration of 50 ppm?
- (A) Impaired cognitive function
- (B) Inhibition of vitamin B-12 absorption
- (C) Megaloblastic changes in bone marrow
- (D) Teratogenesis
- (E) Thrombocytopenia
A patient with uremia is scheduled for emergency surgery. Bleeding time is 18 minutes. The most appropriate initial treatment is
- (A) cryoprecipitate
- (B) desmopressin
- (C) fresh frozen plasma
- (D) platelets
- (E) vitamin K
Which of the following is the most likely cause of the rapid onset of local anesthesia when sodium bicarbonate is added to lidocaine?
- (A) Decreased extracellular calcium ion concentration
- (B) Increased extracellular pH
- (C) Increased intracellular pH
- (D) Increased ionized lidocaine diffusion
- (E) Increased nonionized lidocaine concentration
Bupivacaine 30 ml injected into the inguinal perivascular space will usually block the
- (A) femoral, lateral femoral cutaneous, and obturator nerves
- (B) ilioinguinal, femoral, and sciatic nerves
- (C) femoral, sciatic, and obturator nerves
- (D) ilioinguinal, iliohypogastric, and pudendal nerves
- (E) sciatic, femoral, and posterior femoral cutaneous nerves
The fetal heart rate and uterine contraction tracings shown are most consistent with
- (A) fetal acidosis
- (B) fetal cerebral hemorrhage
- (C) fetal head compression
- (D) fetal hypoxia
- (E) uteroplacental insufficiency
Which of the following is characteristic of soda lime and Baralyme carbon dioxide absorption canisters used in circle systems?
- (A) Calcium carbonate is a major end product
- (B) Carbon dioxide absorption cools the anesthetic gases
- (C) Flushing the canister with oxygen for six hours will regenerate 50% of the spent Baralyme
- (D) Gases lose water vapor as they pass through the canisters
- (E) Soda lime and Baralyme depend on silica as a binding agent
The potency of an inhalational anesthetic correlates best with its
- (A) vapor pressure
- (B) blood/gas partition coefficient
- (C) molar volume
- (D) brain/gas partition coefficient
- (E) oil/gas partition coefficient
Which of the following is an effect of acetazolamide?
- (A) Glucose intolerance
- (B) Increased minute ventilation
- (C) Metabolic alkalosis
- (D) Sinus bradycardia
- (E) Slowed intravenous anesthetic induction
Compared with fentanyl, alfentanil is characterized by
- (A) greater volume of distribution
- (B) greater lipid solubility
- (C) less protein binding
- (D) faster redistribution
- (E) longer terminal elimination phase
Each of the following statements concerning norepinephrine is true EXCEPT:
- (A) Extraneuronal uptake is important in the termination of its activity
- (B) It is formed from dopamine
- (C) Its release is facilitated by ephedrine
- (D) Its uptake is affected by cocaine
- (E) It has minimal beta2-adrenergic activity