What can block the airway?
The airway is made up of the nose, mouth and windpipe (trachea). These carry air, containing oxygen, to the lungs and remove the waste product carbon dioxide from the lungs. If the airway becomes blocked, the oxygen levels in the body drop and eventually the vital organs such as the brain and heart stop working. Death will follow unless action is taken.
A number of things can block the airway: blood, food and vomit are among the main culprits. In an unconscious person, however, the biggest risk is from the tongue. When a person loses consciousness the muscles relax. If the person is lying on his back the tongue will fall to the back of the mouth, blocking off the windpipe and stopping oxygen getting into the body.
Clearing the airway is the first step of the essential ABC of first aid. The method of clearing an airway blocked by the tongue is very simple. By tilting the head back and lifting the chin, the tongue is prevented from falling to the back of the throat and the windpipe remains clear.
Open the airway
• Place one hand on the forehead and gently tilt the head back.
• Remove any obvious obstructions from the casualty’s mouth, including dislodged dentures, but leave well-fitting dentures in place.
• Place the fingertips of two fingers under the point of the casualty’s chin and lift the chin. If injury to the neck is suspected, handle the head very gently and try to avoid tilting the head too much.
For a baby, use only one finger to lift the chin and take particular care not to overtilt the head.
Check for breathing
Once the airway is open, the next priority is to check whether or not the person is breathing. Keep the airway open with one hand on the forehead and one hand lifting the chin. Put your cheek to the victim’s face and look down the chest.
• Look for the movement of the chest and stomach.
• Listen for breath sounds.
• Feel for breathing on the side of your face.
If the casualty is breathing, turn into the recovery position.
If the casualty is not breathing
• Call for emergency help.
If you have not already done so, make sure that an ambulance has been called.
• Start resuscitation.