scope:

This Standard includes all devices designed to assist in the provision of expired-air pulmonary resuscitation. These devices are designed to aid in the protection of the rescuer from communicable diseases transmitted from the area covered by the device via bodily fluids and/or expired air. This Standard includes but is not limited to one-way valve/filter devices incorporating either a face mask, face shield, or oropharyngeal airway.

This Standard does not include devices designed for oesophageal intubation because of the severity of the complications which may attend their use. In addition, laryngeal masks and combined pharyngeal-tracheal airways are not included because studies that evaluate their efficacy for expired-air resuscitation in emergency settings have not yet been concluded.