## Pulmonary Shunting-Chapter 6-Cardiopulmonary Physi

Last Updated By SamanthaCogswell on 03/19/2011
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# The classic shunt equation is:

 a)  QS/QT= CcO2*CaO2/CcO2*CvO2
 b)  QS/QT=CcO2-CaO2/CcO2-CvO2
 c)  QS/QT= CvO2-CaO2/CcO2-CaO2
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• What information would you need to calculate the degree of pulmonary shunting?

1. PB
2.PaO2
3. PaCO2
4. PvO2
5.Hb
6. pH
7. PAO2
8. FiO2
a)All but #6
b)All but #8
c)All but #1
a)All but #1
• Pulmonary shunting below ____ percent shows normal lung status.
a)20
b)12
c)10
d)15
c)15
• A shunt between ___ and ____ percent indicates an intrapulmonary abnormality, that is seldom of clinical significance.
a)15 and 30
b)12 and 30
c)10 and 20
d)15 and 25
c)15 and 25
• Shunting between ___ and ____ percent indicates significant intrapulmonary disease.
a)15 to 30
b)20 to 40
c)30 to 40
d)20 to 30
d)20 to 30
• Shunting greater than ____ indicates a potentially life threatening situation.
a)20
b)30
c)10
b)10
• Calculating the shunting degree is not reliable in patients with a:

1. questionable perfusion status
2. decreased myocardial output
3. unstable oxygen consumption demand
a)1 only
b)2 and 3 only
c)3 only
d)1 and 2 only
e)1, 2, and 3 only
e)1, 2, and 3 only
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Question: The classic shunt equation is: