3397172
Question 1
Question
The Pressure that is responsible for distending the lungs is Alveolar Pressure
Answer
- True
- False
Question 2
Question
Elastic recoil forces of chest wall pulling out and lungs pulling in are opposed by the surface tension of the water in the intraplural space, which is called the pleural pressure
Answer
- True
- False
Question 3
Question
A 19 yr old male arrives at the ED with a knife wound to the chest. All of the following are true except
Answer
-
Alveolar pressure = 0
-
Pleural pressure < 0
-
Lung volume is decreased
Question 4
Question
Lung compliance
Answer
-
Tells you how easy it will be to inflate the lung
-
Static compliance is measured with NO air flow
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Dynamic compliance is measured DURING air flow
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Specific compliance = Compliance/FRC
-
Elastance = deltaP/delta V
-
All of the above are correct
-
None of the above are correct
Question 5
Question
High compliance
Answer
-
Easier to inflate
-
Harder to deflate
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emphysema has increase compliance of the lung
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Fibrosis of lung causes increase in Elastance
-
All are correct
Question 6
Question
Static Compliance Graph (P-V) of respiratory system
Answer
-
This graph is depicting the relationship between transmural pressure and lung volume. The trasmural pressure is the result of opposing recoil of the chest wall (green line) and lung (red line), thus trasmural pressure is the black line
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At TLC transmural pressure is very high (-30cmH2O)
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At 70% TLC the transmural pressure is = lung's recoil pressure
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At FRC lung's recoil pressure = recoil pressure of chest wall so transmural pressure = 0
-
At RV Transmural is positive and lungs are non compliant
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