10 Random Questions
In a patient with adult respiratory distress syndrome who is being mechanically ventilated, which of the following findings indicates the most severe disease?
(A) Decreased functional residual capacity
(B) Decreased lung compliance
(C) Hypercarbia
(D) Hypoxemia
(E) Increased dead space
Reveal Answer
ADVANCED
Respiratory & Critical Care
A patient is hyperventilated to a PaC02 of 20 mmHg. Which of the following physiologic parameters is most likely to be increased?
(A) Airway resistance
(B) Myocardial contractility
(C) Oxygen delivery to tissues
(D) Pulmonary vascular resistance
(E) Serum ionized calcium concentration
Reveal Answer
Cardiac output measured by thermodilution with a pulmonary artery catheter most accurately reflects systemic blood flow in a patient with
(A) aortic regurgitation
(B) atrial septal defect
(C) patent ductus arteriosus
(D) tricuspid insufficiency
(E) ventricular septal defect
Reveal Answer
ADVANCED
Equipment & Physics
Cardiac
The EEG begins to flatten during carotid endarterectomy when regional cerebral blood flow (in ml/min/100 g brain) decreases to
(A) 55
(B) 45
(C) 30
(D) 20
(E) 10
Reveal Answer
ADVANCED
Neuro
When used with morphine for premedication, which of the following drugs is most likely to cause sedation?
(A) Atropine
(B) Cephalothin
(C) Clonidine
(D) Metoclopramide
(E) Ranitidine
Reveal Answer
BASIC
Pharmacology & Pharmacokinetics
Each of the following decreases hepatic blood flow EXCEPT
(A) isoflurane anesthesia
(B) spinal anesthesia
(C) hypercarbia
(D) mechanical ventilation
(E) positive end-expiratory pressure
Reveal Answer
BASIC
Pharmacology & Pharmacokinetics
General
The induction dose of thiopental should be decreased in each of the following situations EXCEPT
(A) age greater than 70 years
(B) cardiogenic shock
(C) decreased hepatic blood flow
(D) hypoalbuminemia
(E) hypothyroidism
Reveal Answer
ADVANCED
Pharmacology & Pharmacokinetics
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
Reveal Answer
BASIC
Pharmacology & Pharmacokinetics
General
Each of the following factors may lead to erroneous readings using pulse oximetry EXCEPT
(A) electrocautery
(B) high cardiac output states
(C) infrared lights near the sensor
(D) intravenous dyes
(E) severe hemodilution
Reveal Answer
BASIC
Equipment & Physics
A healthy 30-year-old woman is undergoing laparoscopy with carbon dioxide insufflation under nitrous oxide 50% in oxygen, isoflurane 0.5%, fentanyl 150 u.g, and controlled ventilation. During the first 15 minutes of the procedure, blood pressure decreases 30%. The most likely cause is
(A) anesthetic overdose
(B) compression of the vena cava
(C) gas embolization
(D) hypercarbia
(E) hypoxemia
Reveal Answer