Page |1
CLINICAL APPLICATION OF
PERFUSION EXAM - LATEST
UPDATED QUESTIONS WITH
VERIFIED ANSWERS
What are cannulation sites for an LVAD? - CORRECT-ANSWER-
Pulmonary Vein and Aorta
What is the minimum pressure for an LVAD inflow, before you are at
risk for drawing air? - CORRECT-ANSWER-5 mmHg
Correction for cannula entrapment in LVAD's can be accomplished by
doing what? - CORRECT-ANSWER-increasing the left atrial preload
(decreasing flow)
--> Cannula is sucking down in the LVAD inflow either in the pulm vein,
lv apex, or just below crossing the aortic valve.
, Page |2
What is the indication that indicates to add an RVAD? - CORRECT-
ANSWER-Right atrial pressure >20 mmHg with IABP and inotropic
support
Cannulation sites for RVAD support? - CORRECT-ANSWER-Right atrium
and pulmonary artery.
Which would not be an important consideration in cannula selection?
A. size B. Shape C. Cannula Circuit connector Size D. Flow requirements
- CORRECT-ANSWER-C. Cannula Circuit Connector Size
Right Ventricular flow rates should be adjusted in relation to what? -
CORRECT-ANSWER-Left ventricular flow rate.
In RVAD's, pump inflow cannula entrapment is indicated by? -
CORRECT-ANSWER-snapping or chattering of the line
, Page |3
What action can correct RVAD cannula entrapment? - CORRECT-
ANSWER-Increasing the right atrial preload. (slow flow)
What is not a cause of decreased LVAD flow?
a) obstructed inflow cannula
b)obstructed outflow cannula
c) increased SVR
d) hypervolemia - CORRECT-ANSWER-d) Hypervolemia
Patients need volume to maintain flows. Hypervolemia would not cause
drops in flows in VAD patients.
The first intervention to re-establish flow inhibited by an entrapped
inflow cannula in a VAD would be? - CORRECT-ANSWER-Decrease flow.
This prevents chattering and snapping. Also entrapped inflow cannulas
in VADs have a potential to pull air if flows are not dropped accordingly.
, Page |4
What should always be done when weaning a VAD patient?
a) administer 300ml of clear
b)decrease the heparin dosage to aid hemostasis
c)increase the heparin dose
d) do not allow a the CI to fall below 3.0 - CORRECT-ANSWER-c)
increase heparin dosage.
When flows fall below 1L during weaning there is increased chance of
emboli/clot formation. Heparin bolus should be given to ensure ACT
between 200-250 at minimum.
What do ALT, GGT, ALP tests indicate? - CORRECT-ANSWER-Liver
Damage
They are blood tests for enzymes commonly found in the liver. Elevated
levels indicate liver is compromised.
What is Amicar? What drug type is it? - CORRECT-ANSWER-Amino
caproic acid.
used for excessive bleeding due to hyperfibrinolysis
inhibits plasminogen to plasmin conversion
CLINICAL APPLICATION OF
PERFUSION EXAM - LATEST
UPDATED QUESTIONS WITH
VERIFIED ANSWERS
What are cannulation sites for an LVAD? - CORRECT-ANSWER-
Pulmonary Vein and Aorta
What is the minimum pressure for an LVAD inflow, before you are at
risk for drawing air? - CORRECT-ANSWER-5 mmHg
Correction for cannula entrapment in LVAD's can be accomplished by
doing what? - CORRECT-ANSWER-increasing the left atrial preload
(decreasing flow)
--> Cannula is sucking down in the LVAD inflow either in the pulm vein,
lv apex, or just below crossing the aortic valve.
, Page |2
What is the indication that indicates to add an RVAD? - CORRECT-
ANSWER-Right atrial pressure >20 mmHg with IABP and inotropic
support
Cannulation sites for RVAD support? - CORRECT-ANSWER-Right atrium
and pulmonary artery.
Which would not be an important consideration in cannula selection?
A. size B. Shape C. Cannula Circuit connector Size D. Flow requirements
- CORRECT-ANSWER-C. Cannula Circuit Connector Size
Right Ventricular flow rates should be adjusted in relation to what? -
CORRECT-ANSWER-Left ventricular flow rate.
In RVAD's, pump inflow cannula entrapment is indicated by? -
CORRECT-ANSWER-snapping or chattering of the line
, Page |3
What action can correct RVAD cannula entrapment? - CORRECT-
ANSWER-Increasing the right atrial preload. (slow flow)
What is not a cause of decreased LVAD flow?
a) obstructed inflow cannula
b)obstructed outflow cannula
c) increased SVR
d) hypervolemia - CORRECT-ANSWER-d) Hypervolemia
Patients need volume to maintain flows. Hypervolemia would not cause
drops in flows in VAD patients.
The first intervention to re-establish flow inhibited by an entrapped
inflow cannula in a VAD would be? - CORRECT-ANSWER-Decrease flow.
This prevents chattering and snapping. Also entrapped inflow cannulas
in VADs have a potential to pull air if flows are not dropped accordingly.
, Page |4
What should always be done when weaning a VAD patient?
a) administer 300ml of clear
b)decrease the heparin dosage to aid hemostasis
c)increase the heparin dose
d) do not allow a the CI to fall below 3.0 - CORRECT-ANSWER-c)
increase heparin dosage.
When flows fall below 1L during weaning there is increased chance of
emboli/clot formation. Heparin bolus should be given to ensure ACT
between 200-250 at minimum.
What do ALT, GGT, ALP tests indicate? - CORRECT-ANSWER-Liver
Damage
They are blood tests for enzymes commonly found in the liver. Elevated
levels indicate liver is compromised.
What is Amicar? What drug type is it? - CORRECT-ANSWER-Amino
caproic acid.
used for excessive bleeding due to hyperfibrinolysis
inhibits plasminogen to plasmin conversion
