Name: 
 

Pulmonary quiz April 07


Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question.
 

 1. 
Which of the following patients is most likely to develop pulmonary edema?
Patient  
Pulmonary Wedge Pressure
Plasma
Colloid
Osmotic Pressure
1
15
25
2
5
20
3
10
35
4
25
35
5
25
15
A.
1
D.
4
B.
2
E.
5
C.
3
 

 2. 
A patient is given 100 percent O2 to breathe for 10 minutes, and arterial blood gases are then measured.  An arterial PaO2 of 625 mm Hg is associated with
A.
no abnormal right-to-left shunting
D.
abnormal perfusion
B.
ventilation/perfusion inequality
E.
diffusion abnormality
C.
hyperventilation
 

 3. 
An accident results in transection of the cervical cord at C2 level.  What effect will this have on breathing? 
A.
Inspiration possible, but not expiration.
D.
Breathing possible but occurs at high rate.
B.
Spontaneous breathing not possible.  Patient must be placed on ventilator.
E.
Normal breathing pattern but decreased vital capacity.
C.
Abnormal breathing pattern with long periods of apnea
 

 4. 
If a patient is treated with a carbonic anhydrase inhibitor, which of the following forms of CO2 transport will be decreased?
A.
carbolic acid
D.
dissolved CO2
B.
bicarbonate
E.
carbamino compounds (CO2 combined with hemoglobin)
C.
PaCO2
 

 5. 
In a normal person at rest, PaO2 is slightly less than PAO2 partially due to:
A.
anatomical shunts
D.
not enough time in pulmonary capillaries (transit time)
B.
unloading of CO2
E.
diffusion limitation
C.
reaction time of O2 with hemoglobin
 

 6. 
During open chest surgery the surgeon accidentally severs the glossopharyngeal and vagus nerves.  What would this patient experience following surgery in terms of ventilatory responses to hypercapnia?  to hypoxia?
A.
Ventilatory response to hypercapnia would be reduced by about 20%. Hypoxia would have no effect or, if severe, diminish ventilation.   
D.
Ventilatory response to hypercapnia would be reduced by about 80% with no change in response to hypoxia.
B.
No change would be expected.  Ventilation would be normal.
E.
Ventilatory response to hypercapnia would be reduced by about 50% with no change in response to hypoxia.
C.
Ventilatory response to hypercapnia and hypoxia would be abolished.
 

 7. 
An asthmatic child comes to your clinic complaining of dyspnea. Because he appears cyanotic you draw an arterial blood sample for blood gases.  The results are: PCO2 = 50 mm Hg, PO2 = 70 mm Hg, pH = 7.32.  Assuming a normal metabolic rate (oxygen consumption = 250 ml/min) and R = 1.0, what is his calculated alveolar ventilation?
A.
3806 ml/min
D.
4315 ml/min
B.
4804 ml/min
E.
5000 ml/min
C.
2401 ml/min
 

 8. 
If alveolar ventilation is doubled (while breathing room air and if CO2 production remains unchanged), then
A.
alveolar O2 pressure (PAo2) will double
D.
arterial CO2 pressure (Paco2) will double
B.
Pao2 will not change
E.
arterial O2 pressure (Pao2) will double
C.
alveolar CO2 pressure (PAco2) will be halved
 

 9. 
Arterial blood gases are obtained from a comatose patient in the ER.  Results are PO2 = 45; PCO2 = 20; pH = 7.6.  Of all the possible problems the patient is having the one definitive diagnosis from the initial data is:
A.
aspirin toxicity
D.
ventricular septal defect
B.
diffusion limitation
E.
hyperventilation
C.
ventilation/perfusion mismatch
 

 10. 
The blood of an anemic individual with a hemoglobin concentration of 10g/100 ml blood breathing 21% oxygen would have a (an):
A.
Elevated arterial PO2 and arterial O2 content of about 18 ml/100 ml.
D.
Reduced arterial PO2 and arterial oxygen content of about 20 ml O2/100 ml blood
B.
Reduced arterial PO2 and arterial oxygen content of about 13 ml/100 ml blood.
E.
Normal arterial PO2 and arterial oxygen content of about 14 ml O2/100 ml blood
C.
Normal arterial PO2 and arterial oxygen content of about 27 ml O2/100 ml blood
 



 
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