Science Booklet
Exam QUESTIONS
CORRECTLY
ANSWERED 2023
An advantage of continuous warm blood cardioplegia is:
A. Increased oxygen delivery
B. Significantly decreased myocardial oxygen tension.
C. A shift of the oxygen dissociation curve to the left.
D. Lower myocardial oxygen consumption - ANSWER increased oxygen delivery
Intra-aortic ballon augmentation is contraindicated in patients with:
A. prosthetic aortic valves
B. aortic insufficiency
C. ventricular septal defects
D. peripheral atherosclerosis - ANSWER aortic insufficiency
When using a roller pump, aortic dissection caused by the aortic cannula my be
detected by:
A. elevated venous return
, B. elevated arterial line pressure
C. elevated left radial artery pressure
D. increased venous saturation - ANSWER elevated arterial line pressure
The most significant advantage of venovenous ECMO over venoarterial ECMO is:
A. improved cardiac support
B. unaffected pulmonary hemodynamics
C. superior arterial oxygenation
D. reduced pulmonary blood flow - ANSWER unaffected pulmonary hemodynamics
The rate of water extraction using an ultrafiltration device is dependent upon all of the
following EXCEPT:
A. number, depth, and diameter of membrane pores.
B. transmembrane pressure
C. electrolyte concentration
D. blood flow rate - ANSWER electrolyte concentration
When compared to true membranes, hydrophobia microporous membrane oxygenators
may exhibit which of the following characteristics?
A. increased oxygen transfer
B. fluid passage to the gas compartment
C. decreased carbon dioxide transfer
D. reduced surface boundary layer - ANSWER fluid passage to the gas compartment
A low venous oxygen saturation may indicate all EXCEPT which of the following:
A. increased oxygen utilization
B. inadequate pump output
C. failure of the oxygenator to oxygenate the blood
D. A-V shunting - ANSWER A-V shunting
Polyvinyl Chloride tubing in the roller pump usually deteriorates by:
A. crumbling away from the outside in
B. crumbling away from the inside out
C. cracking and breaking from the outer edge in
D. cracking and breaking from the inner edge out - ANSWER cracking and breaking
from the outer edge in
The theoretical advantage of blood cardioplegia over crystalloid is evidenced by all the
following EXCEPT:
A. greater preservation of myocardial high energy phosphates.