BS 4272-2-1996
麻醉机和止痛机.使用50/50%（V/V）一氧化二氮和氧气的间歇(需要)流止痛机的规范

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适用范围: This Part of BS 4272 specifies general design and performance requirements for analgesic machines of the intermittent flow (demand flow) type for use with 50/50 % (V/V) mixture of oxygen and nitrous oxide contained in one cylinder, (hereinafter referred to as 'analgesic machines'). This standard applies to analgesic machines intended for: a) connection directly to a high-pressure (approximately 17 MPa) cylinder; and b) connection to a low-pressure (280 kPa to 600 kPa) supply from a medical gas pipeline system, or a similar source, filled from cylinder(s). Additional requirements for portable machines are included. This standard applies to analgesic machines which are intended to be used under supervision for the self-administration of an analgesic mixture in response to the patient's inspiratory effort, e.g. in obstetric practice or in emergency situations. It does not apply to analgesic machines with means to initiate gas flow other than by the patient's inspiratory effort. This standard does not give requirements for the composition of the gas mixture, or for the markings on the gas cylinder. NOTE. The gas is pre-mixed and specified in pharmacopoeia monographs. The markings on the gas cylinder are specified in BS 1319.

BS 4272-2-1996麻醉机和止痛机.使用50/50%（V/V）一氧化二氮和氧气的间歇(需要)流止痛机的规范