Editing Recovery position (section)

==Purpose==
The recovery position is designed to prevent suffocation through obstruction of the airway, which can occur in unconscious [[supine position|supine]] patients.  The supine patient is at risk of airway obstruction from two routes:
*'''Mechanical obstruction''': In this instance, a physical object obstructs the airway of the patient.  In most cases this is the patient's own tongue,{{cn|date=November 2017}} as the unconsciousness leads to a loss of control and [[muscle tone]], causing the tongue to fall to the back of the [[pharynx]], creating an obstruction.{{cn|date=November 2017}}  This can be controlled (to an extent) by a trained person using [[airway management]] techniques.
*'''Fluid obstruction''': Fluids, usually vomit, can collect in the pharynx, effectively causing the person to drown.  The loss of muscular control which causes the tongue to block the throat can also lead to the stomach contents flowing into the throat, called ''passive regurgitation''.  Fluid which collects in the back of the throat can also flow down into the lungs.  Another complication can be [[stomach acid]] burning the inner lining of the lungs, causing [[aspiration pneumonia]].

Placing a patient in the recovery position gives gravity assistance to the clearance of physical obstruction of the airway by the tongue, and also gives a clear route by which fluid can drain from the airway.

The [[International Liaison Committee on Resuscitation]]    (ILCOR) does not recommend one specific recovery position, but advises on six key principles to be followed:<ref name=aha/>
#The casualty should be in as near a true lateral position as possible with the head dependent{{clarify|date=October 2018}} to allow free drainage of fluid.
#The position should be stable.
#Any pressure of the chest that impairs breathing should be avoided.
#It should be possible to turn the victim onto the side and return to the back easily and safely, having particular regard to the possibility of cervical spine injury.
#Good observation of and access to the airway should be possible.
#The position itself should not give rise to any injury to the casualty.