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Skip to 0 minutes and 9 secondsEnsure you have performed DR AB to confirm the casualty is not breathing. Shout for help and request they ring 999, explaining both the situation and location. After they have called emergency services, get the helper to retrieve an AED. Help. Can someone help, please? Is everything OK? This person is not breathing. Can you please phone 999 and ask for an ambulance. And you get an AED. I'm going to start CPR. Step 1, Place the heel of one hand directly between the two nipples. Place the other hand over the top whilst interlocking the fingers. Keep the heel of your hand pressed down and your fingers raised. Step 2. Lean directly over the casualty with the arms locked straight.

Skip to 0 minutes and 55 secondsPush straight down towards the breast bone with the heel of your hand to begin chest compressions. After each compression, release pressure whilst keeping your hands on the casualty's chest, letting the chest return to its normal position before the next compression. Compression should be performed at a rate of 100 to 120 beats per minute. This can be achieved by singing the song "Staying Alive" in your head. Chest compressions should be performed 30 times in a row at a depth of 5 to 6 centimeters. This requires some force and ribs can be broken. Step 3. After 30 chest compressions have been completed, performed two rescue breath.

Skip to 1 minute and 38 secondsPerform the head tilt chin lift and pinch the casualty's nose using the hand from the forehead. Create a seal around the mouth and blow whilst watching the chest rise for two breaths. A complete rescue breath should take one second. If the chest doesn't rise, ensure a tight seal and the airway's open by adjusting the position. Step 4. Continue the cycle of 30 compressions to 2 rescue breath until either emergency help arrives, you are too exhausted to carry on, or the casualty starts to breath. If there are other people available to help you, they should take turns to perform CPR every one to two minutes.

Skip to 2 minutes and 19 secondsIf an AED becomes available, it should be used immediately, even if you are in the middle of chest compressions. Step 5. Open up the AED and read the instructions. Ensure casualty's chest is exposed and dry. Switch on AED and remove pads from their packaging. Remove the paper on the back of the pads and place them in the position shown. One pad is placed beneath the collarbone on the right side of the casualty. And the other is placed slightly lower on the left side. Stand clear make sure no one has stood near the casualty, as you will get shocked. Follow the vocal or visual prompts given by the device to shock the casualty. Shock advised. Deliver shock now.

Skip to 3 minutes and 7 secondsPress the orange button now. Shock delivered. Start CPR. After the shock, immediately return to CPR, performing for two minutes and then shocking again. Repeat this until the emergency help arrives or the casualty begins to breathe. CPR keypoints. Call for help. Get your help to call 999 and retrieve an AED. Remember, 30 compressions to 2 rescue breaths with a depth of 5 to 6 centimeters and a rate of 100 to 120 beats per minute. Change person every one to two minutes if possible and stop when you are exhausted. As soon as an AED is available, use it.

Performing CPR

In this video we show you how to perform CPR on a casualty whose heart has stopped.

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This video is from the free online course:

Basic First Aid: How to Be an Everyday Hero

University of Glasgow