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Bronchidilators

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"The bronchodilator effects of these medications can sometimes cause a worsening of arterial hypoxemia by redistributing the inspired gas to areas of decreased perfusion. Administering the bronchodilator with an mixture oxygen- enriched gas usually alleviates this effect."

I don't understand what is meant by "redistributing the inspired gas to areas of decreased perfusion"

How does this causes worsening of hypoxemia? Shouldn't it be the opposite?

lvnlrn

Specializes in LTC, MDS, ER.

"Redistributing the inspired gas to areas of decreased perfusion"

I took the liberty of rewording this so it says:

"After using this medication, the bronchioles are widened (dilated). As a result, gas (oxygen) that has been breathed in is spread to areas in the lungs that do not have a good blood supply. Poor blood supply=oxygen won't be able to cross into the blood stream from the lungs=worsening oxygen content in the blood (hypoxemia)"

Hope this helps, but I'm definitely not a respiratory therapist!!