If Properly performed how long can CPR sustain life for?

Answer 1

First of all CPR does not sustain life - When CPR is started the patient is unconscious, not breathing and has no pulse, this is called 'Clinical Death'.CPR is performed to create an Oxygen rich circulation of blood to the brain to prevent tissue necrosis, (Brain Death). So effectively when performing CPR you are not keeping the patient alive, you, are preventing them from brain damage and or Death.CPR is performed for three reasons:1. To give the patient a chance of survival2. The patient may be an organ donor and CPR is used to keep the organs Oxygenated3. Practice - you may not resuscitate the patient but the next time you need to perform CPR you will be a little more experienced.The rescuer should only stop CPR if one of three things happen:1. The patient is resuscitated2. Advanced Life Support takes over3. When the rescuer is physically exhausted.THEREFORE:As long as you are feeding the brain with Oxygen, there is actually no definite time limit.