| 摘要 |
The flow meter comprises an oxygen duct and an anaesthetic gas duct, especially for nitrous oxide, and is especially noteworthy in that it comprises: - a proportional dose rate valve 50 having a compartment 51 traversed by the oxygen, the said compartment having a flexible wall 55 actuating a shutter 57-65, calibrated by a spring 58, interposed on the gas circuit; - an adjustable release tap 66 for the gas, upstream from the said proportional dose rate valve; and - downstream from the said proportional dose rate valve, on each of the oxygen and gas ducts, before they are mixed, a dynamic resistance 67, 68 respectively (or adjustable charge loss). <IMAGE> |
