Wing Woo Gar
Grandmaster
Ambu bag is still a thing.This would be back in the 70s, things probably have changed since that time. I think most of the modern day medics probably use what we called "ambu bags" in applying CPR...
If one doesn't have any kind of device, ya gotta do, what ya gotta do...
As with anything medical
Always seek professional advice for questions concerning health or medical techniques..
Just offering some conversation from a long ago past..