Term
| ______ is responsible for most of the defective gas exchange in pulmonary diseases |
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Definition
| mismatch of ventilation and blood flow |
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Term
| two causes of impairment of gas exchange |
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Definition
| hypoventilation and shunt |
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Term
| by the time oxygen enters lung what is its pp |
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Definition
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Term
| by the time the oxygen has reached the lungs what is the partial pressure of hemoglobin? |
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Definition
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Term
| the rate of PO2 in the alvoli is relatively stable from breath to breath due to the fact that |
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Definition
| tidal volume is a relatively small portion of the total lung volume |
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Term
| rate of alveolar PO2 is largely determined by the level of alveolar ventilation |
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Definition
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Term
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Definition
hypoventilation
diffusion limitaiton
shunt
ventilation-perfusion inequality |
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Term
| when the systemic arterial blood reaches the tissue capillaries, o2 diffuses to the mitochondira, wher ethe PO2 is much |
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Definition
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Term
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Definition
morphine and barbituate
damaget ot chest wall
paralyiss of respiratory muscles
high resistance to breathing |
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Term
| respiratory exchange ration R |
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Definition
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Term
ventilation increases____ from top of lung to bottom
blood flow increases more |
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Definition
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Term
| v/q ration high or low at top of lung |
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Definition
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Term
upper lung values of
pco2, po2, v/q, o2 in, co2 out, R ration |
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Definition
upper lung ph 7.51,
PO2 134
pCO2 20
V/Q high 3 something
02 in 4
CO2 out 8
R=2 |
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Term
lower lung values of
pco2, po2, v/q, o2 in, co2 out, R ration |
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Definition
po2, 54
pco2 45
V/Q low fractional
co2 out 30
o2 in 60
R=.5 |
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Term
| uniformly ventilated and prefused lugn would tranfer more/less o2 and po2 |
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Definition
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Term
| if the same amount of gas are beign trasnfereed the lung with ventilation-perfusion inequality cannot maintain as high an arterial PO2 or as low and arterl Pco2 as homogenous lung |
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Definition
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Term
| if you have a low v/q ration you are going to drop teh po2 of the blood more htan a high v/q ratio will raise it |
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Definition
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