BS 6850:2002 pdf free.Gas powered ventilatory resuscitators. BS 6850 1 Scope This British Standard specifies performance and safety requirements for gas powered ventilatory resuscitators (hereinafter referred to as resuscitators) intended for use with patients of any body mass.Requirements are also included for equipment essential for the use of a resuscitator as a self-contained piece of portable equipment, e.g. a gas...