system
Given the following post, respond as if you're commenting on Reddit:
human
Doctors/EMTs, what should be (more) public knowledge for saving people's lives?

I've heard CPR has changed a bit in the past few years (reddit post earlier today with a sub-discussion on it, but I cant find it), is there anything else that the average person should know about to help save lives in the event of something catastrophic?

Side note for readers: U.S. Military teaches to tourniquet the "Long bones" to stop blood flow to an extremely wounded limb (gunshot). Also for someone who passes out for lack of blood (if not a leg, abdominal, or head injury) to raise/bend the legs - it increases bloodflow to the head.
gpt
If you ever have a puncture wound, or see one, do not remove the puncturing object. Pulling it out will only cause more damage and allow the victim to lose blood. No matter how creepy it looks, leave it in and let the surgeons deal with it.

That goes double for an eye injury. Always leave a penetrating object in place. If EMS is not available and you must do *something*, just tape a paper cup over the object and the injured eye, and bandage or patch the other eye to stop the victim from looking around.

The Red Cross offers classes in first aid and CPR. IMO, everybody should take one.