Inhaling anaethesia device with gas pressure watching means in the annex circuit

摘要

An apparatus consisting of a main anaesthesia circuit (1) with a main closed circuit channel (40, 40a, 40b) with a system (20, 23) for monitoring the pressure and composition of gas in the circuit, is new. The apparatus consists of a main anaesthesia circuit (1) with a main closed circuit channel (40, 40a, 40b) with a system (20, 23) for monitoring the pressure and composition of gas in the circuit. It also has an auxiliary circuit (11) with a channel (30) and instruments (20, 22) for measuring one or more of the following parameters in at least part of the auxiliary circuit: (i) the anaesthetic gas pressure; (ii) the composition of the anaesthetic gas; (iii) the composition of the gas exhaled by the patient.