Clinical Application of Perfusion Exam
Questions With Complete Solutions
2 yr old 12 kg child is placed on complete bypass,
when RA is opened large amount of venous blood
is present. What is the cause Correct Answers
Persistent left superior vena cava
4:1 crystalloid cardioplegia is being given. After
500 ml of blood cardioplegia is given what was the
total amount of K administered? (50 mEq KCl in
500 mL .9% saline) Correct Answers 10 mEq
A 2 year old child weighting 12 kg is going on
bypass. Prebypas Hct is 40% and priming volume is
1200 ml what is the diluted hematocrit? Correct
Answers ((12*75)*40)/((12*75)+1200)= 17.1%
A clinically insignificant cold agglutinin
characteristic would be?
a) irreversible agglutination
b) complement binding
c) hemolysis
d) peak activity at 0-4 degrees celsius Correct
Answers D. peak activity at 0-4 degrees celsius.
It is usually considered clinically insignificant if the
thermal amplitude test is less than 30 C.
,A compensatory mechanism for low hemoglobin is?
Correct Answers increasing cardiac output and
oxygen extraction
A concentration of K+ in blood cardioplegia for a
liter total?
(4:1 blood cardioplegia, 50mEq KCl in 500 ml .9%
saline) Correct Answers 20 mEq/l + patients
serum K+
A patient with renal failure and poor urine output
on pump should receive what intervention first?
a) dobutamine infusion
b) nitroprusside infusion
c) insert an IABP
d) give a 500c.c bolus of clear Correct Answers A)
dobutamine infusion
Dobutamine although an inotrope is not necessarily
a pressor. One characteristic is that infusion may
cause increased renal blood flow due to its B2
stimulation characteristics.
ABO compatibility is necessary for which type of
product? Correct Answers Fresh Frozen Plasma
(FFP)
At a flow rate of 250 ml/min how long will it take to
administer 1L of blood cardioplegia. Correct
Answers 4 Minutes. Yes this is a real test question.
, At what part of contraction is Aortic insufficiency
worst? Correct Answers during the start of
ventricular diastole
At what temperature will brain function cease?
Correct Answers <15 degrees as been seen to
cease brain activity.
Besides keeping the PDA patent what else will
prostaglandin E do to the patients vascular
system? Correct Answers decrease the blood
pressure and SVR
Blood volume in tubing sizes? Correct Answers
1/4=10 ml/ft
3/8=20 ml/ft
1/2=40 ml/ft
5/8=50 ml/ft
Calcium when given with the cross clamp may lead
to ? Correct Answers stone heart syndrome
Can cell saver products from a patient with a GI
bleed/trauma injury be returned to the patient?
Correct Answers No
The product from these patients is considered to
be contaminated.
Pros and cons of retransfusing should be discussed
with surgeon.
Questions With Complete Solutions
2 yr old 12 kg child is placed on complete bypass,
when RA is opened large amount of venous blood
is present. What is the cause Correct Answers
Persistent left superior vena cava
4:1 crystalloid cardioplegia is being given. After
500 ml of blood cardioplegia is given what was the
total amount of K administered? (50 mEq KCl in
500 mL .9% saline) Correct Answers 10 mEq
A 2 year old child weighting 12 kg is going on
bypass. Prebypas Hct is 40% and priming volume is
1200 ml what is the diluted hematocrit? Correct
Answers ((12*75)*40)/((12*75)+1200)= 17.1%
A clinically insignificant cold agglutinin
characteristic would be?
a) irreversible agglutination
b) complement binding
c) hemolysis
d) peak activity at 0-4 degrees celsius Correct
Answers D. peak activity at 0-4 degrees celsius.
It is usually considered clinically insignificant if the
thermal amplitude test is less than 30 C.
,A compensatory mechanism for low hemoglobin is?
Correct Answers increasing cardiac output and
oxygen extraction
A concentration of K+ in blood cardioplegia for a
liter total?
(4:1 blood cardioplegia, 50mEq KCl in 500 ml .9%
saline) Correct Answers 20 mEq/l + patients
serum K+
A patient with renal failure and poor urine output
on pump should receive what intervention first?
a) dobutamine infusion
b) nitroprusside infusion
c) insert an IABP
d) give a 500c.c bolus of clear Correct Answers A)
dobutamine infusion
Dobutamine although an inotrope is not necessarily
a pressor. One characteristic is that infusion may
cause increased renal blood flow due to its B2
stimulation characteristics.
ABO compatibility is necessary for which type of
product? Correct Answers Fresh Frozen Plasma
(FFP)
At a flow rate of 250 ml/min how long will it take to
administer 1L of blood cardioplegia. Correct
Answers 4 Minutes. Yes this is a real test question.
, At what part of contraction is Aortic insufficiency
worst? Correct Answers during the start of
ventricular diastole
At what temperature will brain function cease?
Correct Answers <15 degrees as been seen to
cease brain activity.
Besides keeping the PDA patent what else will
prostaglandin E do to the patients vascular
system? Correct Answers decrease the blood
pressure and SVR
Blood volume in tubing sizes? Correct Answers
1/4=10 ml/ft
3/8=20 ml/ft
1/2=40 ml/ft
5/8=50 ml/ft
Calcium when given with the cross clamp may lead
to ? Correct Answers stone heart syndrome
Can cell saver products from a patient with a GI
bleed/trauma injury be returned to the patient?
Correct Answers No
The product from these patients is considered to
be contaminated.
Pros and cons of retransfusing should be discussed
with surgeon.
