The chinlift and jaw extension very important in emergency situation especially in time of giving cpr to opening airways
To opening airways these maneuver will changes the position of mandible anteriorly lifting the tongue and epiglottis from glotties opening
Pressing on the bone 2cm up the angle of jaw and below the ear may wake up the patient because it is painful and lifting the chin and pulling it forward even witha central neck position to open the airways.
It also help to prevent from spine injury during head injury.
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