In Mouth To Mouth Cpr, Are You Not Exhaling Co2 Into The Person’s Mouth? So How Is That Going To Help Them?
I’m confused about this. How does breathing CO2 into a person help with supplying oxygen to their brain? I know it will help inflate the lungs, but aren’t you inflating them with mostly CO2 and only a very minor amount of O2?
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November 25, 2009 @ 11:39 pm
When providing artificial respirations in this manner, you are not breathing pure carbon dioxide into their lungs. Exhaled air obtains roughly 15% oxygen (give or take a few percentage points depending on the person, environment, and circumstances). 15% oxygen is better than nothing.
November 26, 2009 @ 5:31 am
Most of the air you breathe is not oxygen anyway. Only about 21% is. Anyway, yes there is less oxygen in the air you are breathing into the other person’s mouth, but there is enough to sustain life. If you are having to give a person CPR, then something is horribly wrong anyway and they need air very badly. The amount of oxygen in your breathe is enough when the alternative is death.
November 26, 2009 @ 6:16 am
When you take the breath you don’t absorb all the oxygen, especially if you do it quickly, leaving plenty left for them.
November 26, 2009 @ 8:25 am
The air you breathe in is about 20-22% oxygen, and when you breathe out, it is still 15-16% oxygen- plenty to help someone in trouble!