Portable rebreather apparatus for emergency inhalation anesthesia in remote locations

摘要

The respiration gas line (16,2,7) is supplied with oxygen by chlorate cartridges (21,22) incorporating ignition devices (23,24) with oxygen stored in a reservoir (19) and a pressure sensor (20). The sensor signals to a controller (25) on registering a low pressure, igniting another cartridge automatically. First and second control valves (17,18), situated between oxygen source and respiration line, have oxygen and ambient dilution air flowing. A sensor (9) measures delivered oxygen concentration, while a second controller (30) connected to this sensor and the control valves, maintains the required oxygen concentration for respiration. A xenon gas source (26) is connected to the gas supply line. The respiration circuit (6) includes a respiration gas line, with anesthetic gas supply unit (10) and anesthetic gas vent valve (15) connected to the second controller along with a carbon dioxide absorber (11). An activated carbon filter (12) with bypass line (14) and valve (13), enable respiration gas to be switched over to the filter. A unit determines anesthetic gas concentration, carbon dioxide concentration and respiratory passage pressure, integrated with a measurement device (9). Chlorate cartridges are filled with differing chemicals (to vary supply composition).