Having basic CPR knowledge is vital in any situation, and you should consider getting a certification for CPR as well. You never know what might happen in the future.
Here are some basic tips.
If someone is unresponsive and/or not breathing normally:
1. Send someone to call 999 and fetch a defibrillator if one is available
2. Give 30 chest compressions at a rate of 100-120 per minute
3. If you can and you are willing, then give 2 rescue breaths after every 30 compressions
4. Continue until emergency professionals arrive on the scene, the patient starts to breathe normally or you are too tired to continue.
For children and drowning emergencies, give 5 initial rescue breaths before you start with chest compression. Then continue with the typical cycle of 30:2. You want to aim your compressions at the centre of the chest to a third of its depth; the force needed changed from person to person. Two hands should be used on adults, one hand for a child, and just two fingers for an infant.
An average sized adult doing CPR on an equally sized adult will not be effective after 2 minutes, because the one doing the CPR will either slow down or stop pressing hard enough. CPR is hard work and it exhaust your body, that is why we always recommend interlocking your elbows so that your bum and leg muscles are doing the hard work instead of your smaller arm muscles.
If there is someone who can assist in the process, switch with them every 2 minutes to give your body rest too.
Practising a CPR manikin will help these protocols sink in, because in actual situations your mind might go blank.
If you are looking a health and safety course, peruse the Wimbledon Training website for your course of choice, with online courses available as well, and let your upskilling begin!