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Old 02-14-2013
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Lungs COPD patient


"Supplementary O2 must be cautious in patient with COPD because hypoxia drives their respiratory function (where in normal undivisual, the pCO2 medicates the resp. drive) UW"

Can anyone help me to understand this:
How does hypoxia drive their resp. function in patient with COPD ?

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Old 02-18-2013
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Default COPD

Because in COPD you get chronically elevated CO2 levels in the blood and that chronically stimulated the respiratory center and sensitizes it. then what happens is that CO2 is no longer the driving force behind respiration.So Instead O2 becomes the driving force.By giving 100% O2 you will get respiratory depression.Hope that helps.
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ha000mo (02-19-2013)
Old 02-18-2013
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I think Water (above me) answers your question...but, just in case you still need further clarification...I'll try to explain it in another way. =)

--- In COPD patient, have high CO2 bc something is obstruction the airway, therefore, the PO2 <60 mmhg. Because the PO2 is low, itís a good thing for COPD, bc it allows the peripheral chemoreceptors to kick on to make you breath in and out.

--- Should not give oxygen mask to COPD patient bc low PO2 cause you to breathÖif you give the pt an oxygen cut out the ptís own drive to breath..and the pt canít breath in or out on their own..and thus not allowing the peripheral chemoreceptors to work appropriately.
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water (02-19-2013)


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