Arrangement of anaesthesia appliances for separating their sensitive parts from anaesthetic gas and expired air

摘要

Arrangement for anaesthesia appliances comprising a circulation system 4 for connection to a patient and a connection unit 13 for a second circulation system 3 with devices 5, 9, 10, 11 for permitting pressure changes. The connection unit 13 comprises a member 35 which separates the two systems from each other without possibility of gas exchange between them. The member 35 is designed to increase one space during reduction of the other, and vice versa, so that pressure changes can be transferred between the two circulation systems 3, 4 without gas transfer. The devices permitting pressure changes comprise valves 10, 11 for connection to the surrounding atmosphere, a ventilator 5 for controlled breathing, and a pump 9 for manually controlled breathing. IMAGE