The drawbacks aren't likely to be as bad as with current methods of CPR:

1) Even a responder in good physical shape tends to lose strength/pressure after just one minute of chest compressions.

2) The success rate is low even if properly performed.

3) The success rate is even lower when there is only one responder.

4) Vomiting during CPR is common, and can result in the victim inhaling the vomit and choking. At the very least, it interrupts the chest compressions.

5) Broken ribs during regular CPR can splinter and perforate the heart, lungs, etc.

6) Most people don't carry CPR masks and won't give MTM resusitation because they're afraid of getting a disease. (This despite the fact that most of these same people would pick up, kiss and have unprotected sex with any available party.)

If this is a truly viable method, I hope the word gets out. Looking at the wooden "pressure applicator", the design/pattern for it could be put on the internet and made by almost anyone, and could be carried in a car, briefcase or backpack.

Sue