CPR mannequin

A CPR mannequin for practising cardiopulmonary resuscitation of a human comprising:

• a simulated human head and neck portion with an air passage extending from a mouth opening to a neck opening in an end of the neck remote from the head,
• an inflatable simulated human chest portion secured to the neck and having a flexible wall member simulating a chest which rises and fall with inflation and deflation of the chest portion, said inflatable chest portion having an air capacity representative of the lung capacity of a human adult, and
• a further air passage connecting the air passage in the neck to the inflatable chest portion to enable air to be blown through the mouth opening and through the air passage in the head and neck portion and through the further air passage into the chest portion to inflate the chest portion and cause the flexible chest wall member to rise,
• said inflatable chest portion comprising a releasable retainer which operates before release to reduce the air capacity of the chest portion to a volume representative of the lung capacity of a human child, said releasable retainer being released by air pressure caused by continued blowing of air into the mouth opening when the chest portion has been inflated to an extent representative of the lung capacity of a human child.