Anesthesia Hub -

10 Random Questions

Prompt control of seizures induced by bupivacaine is necessary because

(A) cerebral metabolic rate for oxygen increases more than cerebral blood flow
(B) cerebral blood flow is increased
(C) bupivacaine decreases aerobic cerebral metabolism
(D) cardiac failure may occur
(E) ventilation may be impaired

ADVANCED Neuro Regional & Pain

Which of the following statements concerning relationships among alveolar pressure, volume, and surface tension is true?

(A) Surface tension of surfactant decreases as alveolar volume decreases
(B) Surface tensions of water and of surfactant behave similarly as volume decreases
(C) Changes in alveolar surface tension with volume are the same during expansion as during contraction
(D) Pressure in the alveolus is inversely related to surface tension
(E) Pressure in the alveolus is directly related to alveolar radius

BASIC Respiratory & Critical Care

Which of the following statements concerning the choice of nitroprusside or nitroglycerin to induce deliberate hypotension is true?

(A) Nitroglycerin is more potent
(B) Nitroglycerin produces hypotension by acting on both arterial and venous capacitance vessels
(C) Nitroprusside produces less rebound hypertension on discontinuation
(D) The toxic effects of nitroprusside are independent of dose
(E) The therapeutic effects of nitroprusside may persist on discontinuation

Which of the following is an effect of magnesium sulfate at the neuromuscular junction?

(A) Augmentation of acetylcholine reuptake
(B) Decrease in acetylcholine binding
(C) Decrease in acetylcholine metabolism
(D) Decrease in the prejunctional release of acetylcholine
(E) Potentiation of the effects of ionized calcium

BASIC General

A 68-year-old man who is scheduled for outpatient cystoscopy has non-insulin-dependent diabetes mellitus controlled with glipizide (Glucatrol) 5 mg twice daily. He has had nothing to eat since awakening this morning and has not taken glipizide today. His blood glucose level is 185 mg/dl. Before proceeding, the most appropriate management is to administer

(A) glipizide 5 mg orally
(B) NPH insulin 10 units subcutaneously
(C) regular insulin 10 units intravenously
(D) dextrose and regular insulin by infusion
(E) no additional diabetic medication

BASIC Pharmacology & Pharmacokinetics General

In a patient who is to undergo clipping of a cerebral aneurysm, an advantage of isoflurane over nitroprusside for induction of hypotension is

(A) better maintenance of cardiac output
(B) better maintenance of cerebral blood flow
(C) greater decrease in cerebral oxygen consumption
(D) greater decrease in afterload
(E) more rapid titration of systemic blood pressure

ADVANCED Pharmacology & Pharmacokinetics Neuro

A 54-year-old woman who is scheduled to undergo emergency exploratory laparotomy takes warfarin sodium for anticoagulation. Prothrombin time is 19 sec (control 12 sec). Which of the following agents is most appropriate to reverse the effects of warfarin?

(A) Cryoprecipitate
(B) Desmopressin (DDAVP)
(C) Factor IX concentrate
(D) Fresh frozen plasma
(E) Pooled factor VIII

BASIC Transfusions & Fluids

A newborn infant is undergoing repair of gastroschisis. During closure of the abdominal wall, ventilatory pressures and central venous pressure increase markedly. The most appropriate management is to

(A) administer a bronchodilator
(B) decrease tidal volume and increase ventilatory rate
(C) increase the neuromuscular block
(D) increase the depth of anesthesia
(E) ask the surgeon to reopen the abdomen

ADVANCED Pediatric

A 70-kg 24-year-old man with bilateral pneumonia whose lungs are being mechanically ventilated has the following measured parameters: tidal volume 750 ml; FiO2 0.7; rate 12/min; positive end-expiratory pressure 10 cmH2O; PaO2 75 mmHg; PaCO2 55 mmHg; pH 7.30. Which of the following alterations should be made in the ventilatory settings?

(A) Decreasing positive end-expiratory pressure
(B) Decreasing respiratory rate
(C) Increasing fresh gas flow rate
(D) Increasing FiO2
(E) Increasing tidal volume

BASIC Respiratory & Critical Care

Which of the following statements concerning monitoring of neuromuscular function during general anesthesia is true?

(A) Facial nerve electrodes underestimate recovery from block, compared with ulnar nerve electrodes
(B) More current is required to depolarize a nerve beneath the negative electrode than beneath the positive electrode
(C) Needle electrodes should be electrically grounded
(D) Supramaximal voltage is 10% higher than the voltage required to elicit pain in the awake patient
(E) The amount of neuromuscular block is underestimated if electrodes are placed on a paretic limb

BASIC Equipment & Physics