When the patient is in coma and in cardiac arrest, it is very important to open the airway. There are two ways to open the airway: the first is called the head-up jaw method, the rescuer kneels on the right side of the patient, about a fist distance from the patient, the left hand small fissure on the patient’s forehead downward pressure, the right hand index finger, middle finger on the patient’s lower jaw upward lift, so that the patient’s nostrils to the sky, then the back fall of the tongue root can leave the airway, the airway can be opened, the method is generally applicable to patients without cervical spine injury; the second The second method is called jaw lifting method, the rescuer kneels on the side of the patient’s head with both hands to lift the patient’s jaw and push it forward, this method can also open the airway, applicable when the patient has cervical spine injury.