10 Random Questions
Carbon monoxide poisoning with a carboxyhemoglobin concentration of 20% is characterized by each of the following EXCEPT
(A) decreased oxygen-carrying capacity of hemoglobin
(B) decreased PaO2
(C) shift of the oxyhemoglobin dissociation curve to the left
(D) normal minute volume of ventilation
(E) headache and nausea
Reveal Answer
BASIC
Respiratory & Critical Care
A patient receiving monoamine oxidase inhibitor therapy for depression undergoes an emergency cholecystectomy. Which of the following is the best means of providing postoperative analgesia in this patient?
(A) Epidural analgesia using 0.25% bupivacaine
(B) Intravenous meperidine
(C) Epidural analgesia using meperidine
(D) Epidural analgesia using 1% lidocaine with epinephrine
(E) Intercostal analgesia using 1% lidocaine with epinephrine
Reveal Answer
ADVANCED
Pharmacology & Pharmacokinetics
Regional & Pain
In a healthy 70-kg adult, which of the following is the most likely effect of intravenous administration of morphine 10 mg on ventilatory responses?
(A) Increased response to hypoxia and decreased response to hypercarbia
(B) Decreased response to hypercarbia and no change in response to hypoxia
(C) Decreased response to both hypoxia and hypercarbia
(D) No change in response to hypercarbia and decreased response to hypoxia
(E) No change in response to hypoxia or hypercarbia
Reveal Answer
Which of the following statements regarding innervation of the upper extremity is true?
(A) Blockade of the radial nerve decreases the patient's ability to spread the fingers apart
(B) The brachial plexus receives preganglionic sympathetic fibers arising from C5 through T2
(C) Interscalene injection of the brachial plexus at C6 is likely to spare the axillary nerve.
(D) The musculocutaneous nerves receive contributions from C5 and C6
(E) The vertebral artery lies posterior to the nerve roots of the brachial plexus
Reveal Answer
ADVANCED
Regional & Pain
The accuracy of oxyhemoglobin saturation determined by digital pulse oximetry is affected significantly by each of the following EXCEPT
(A) movement of the patient
(B) isovolemic hemodilution to a hematocrit of 23%
(C) position of the operating room light
(D) intravenous administration of methylene blue
(E) infusion of phenylephrine
Reveal Answer
BASIC
Equipment & Physics
A patient is scheduled for amputation of the third metatarsal. A tourniquet will not be used during the procedure. The most effective anesthesia will be provided by block of which of the following nerves?
(A) Femoral
(B) Common peroneal and tibial
(C) Sural and deep peroneal
(D) Sural and tibial
(E) Tibial, saphenous, and deep peroneal
Reveal Answer
ADVANCED
Regional & Pain
To predict the requirement for isoflurane in milliliters of vapor per minute during closed circuit anesthesia, each of the following is necessary EXCEPT
(A) cardiac output
(B) oxygen consumption
(C) MAC of isoflurane
(D) duration of administration
(E) blood-gas partition coefficient
Reveal Answer
BASIC
Pharmacology & Pharmacokinetics
The following hemodynamic values are obtained two hours after coronary artery bypass surgery: Cardiac index 1.7 L/min/m2; Pulm Art. Occ. Pressure 22 mmHg; MAP 60 mmHg; Urine volume 0.2 ml/kg/hr. The most appropriate management is
(A) dopamine infusion
(B) nitroprusside infusion
(C) norepinephrine infusion
(D) volume expansion
(E) observation without intervention
Reveal Answer
ADVANCED
Pharmacology & Pharmacokinetics
Cardiac
Each of the following statements concerning the activated clotting time (ACT) is true EXCEPT:
(A) The ACT is more sensitive than the activated partial thromboplastin time (APTT) to blood heparin concentration
(B) The ACT is prolonged if the specimen is not warmed during the assay
(C) The ACT should be greater than 300 sec before initiating cardiopulmonary bypass
(D) Hypofibrinogenemia may prolong the ACT after cardiopulmonary bypass
(E) Whole blood is used for measurement of the ACT
Reveal Answer
ADVANCED
General
Cardiac
A patient has palpitations, flushing, and light-headedness after gingival injection of a local anesthetic. This reaction is most likely caused by
(A) epinephrine in the local anesthetic
(B) local anesthetic allergy
(C) para-aminobenzoic acid allergy
(D) methylparaben reaction
(E) vasovagal reaction
Reveal Answer
BASIC
Pharmacology & Pharmacokinetics