Preface This is the first edition of CAN/CSA-Z10651-4, Lung ventilators - Part 4: Particular requirements for operator-powered resuscitators, which is an adoption, with Canadian deviations, of the identically titled ISO (International Organization for Standardization) Standard 10651-4 (first edition, 2002-03-01). This CSA Standard, and CAN/CSA-Z10651-5-08, Lung ventilators for medical use - Particular requirements for basic safety and essential performance - Part 5: Gas-powered emergency resuscitators, replace CAN/CSA-Z8382-94, Resuscitators Intended for Use with Humans. Scope This European Standard specifies requirements for operator-powered resuscitators intended for use with all age groups and which are portable and intended to provide lung ventilation to individuals whose breathing is inadequate. Operator-powered resuscitators for infants and children are designated according to body mass range and approximate age equivalent. Electrically- and gas-powered resuscitators are not covered by this European Standard. NOTE Annex B contains rationale statements for this Part of this European Standard. The clauses and subclauses which have corresponding rationale statements are marked with R) after their number.