if we breathe out carbon dioxide how does cpr work?

Answer 1

The air that we expel from breathing is partially carbon dioxide, but there is still a great deal of oxygen present in each breath. There is more than enough in a single breath of air to pass back and forth a few times.

Answer 2

Because we also exhale about 15% oxygen. When you think that room air is only 21% oxygen, it's a significant amount. If you want to get more oxygen into a patient with CPR you can use an Ambu-bag which provides more oxygen and less carbon dioxide making CPR more effective.

Answer 3

Oxygen is not the main thing in CPR. The idea is simply to insert air into the lungs, so that you can pump it (in case of drowning, to pump the water out). If we put no air but keep pumping the chest, the victim's lungs will run out of air and wouldn't be able to breath at all.
You can breath out 100% of carbon dioxide or 100% oxygen or 100% nitrogen, it wouldn't matter.

Answer 4

Because what you're breathing out is not 100% Carbon Dioxide.

The air you breathe in is 21% oxygen, and your lungs only use about 6-7% oxygen, making the air you exhale about 14-15% oxygen, still good for resuscitation.

Answer 5

We only use about 20 percent of the O2 contained in each breath. So technically we can breath in the same air 5 times before it's useless to us. That's why when you administer ''Artificial Respiration'' (not CPR Cardio Pulmonary Resuscitation) there plenty of oxygen to share with the victim.

Answer 6

You actually breathe out more oxygen than carbon dioxide, so it helps by giving the other person the oxygen they need.

Answer 7

cause you take in 16% oxygen when you breath in from the air, the human lungs only take in 4% of that. so you exhale 12% oxygen so the next person in cpr has enough oxygen to absorb

Answer 8

There is still quite a bit of oxygen in the breath we exhale, about 15%, compared to about 3 - 4% CO2.

Answer 9

because when you breathing out you are breathing out o2 also. that is why cpr is effective. the best thing is early detection and early defibrilation and early ems response. hope this helps. if you are not certified in cpr i would recomend finding a class because you might just save a life some day

Answer 10

there is enough breatheable air in the air that we breathe out, that it is enough to work in CPR for a while at least. Of course its no substitute for pure oxygen, but its better than nothing.