Anaesthetic gas capture device

An anaesthetic gas capture device for extracting anaesthetic agent from a gas flow, the device comprises or can be connected to suction means for drawing gas flow to the device, the device is configured to receive one or more capture canisters through which gas can flow, the suction means operates upstream of the capture canister/s whereupon the suction means pushes gas through the or one or more of the canisters under positive pressure and agent extraction occurs under positive pressure.

A capture canister for a medical gas capture device, the canister comprises a body containing adsorbent material and through which gas can flow, the canister includes an inlet and an outlet, a valve is provided for the inlet and a valve is provided for the outlet, the inlet and outlet valves are normally closed to seal the body and open when the canister is loaded into a device, in which the canister comprises a mesh plate at or towards the inlet and/or outlet.

An anaesthetic gas capture device for extracting anaesthetic gas from an anaesthesia machine, comprising suction means for drawing gas exhausted from an anaesthetic machine to the device, the device has means for receiving one or more capture canisters through which exhausted gas can flow, the device comprises an air break such that it cannot apply vacuum pressure to the machine in use, the device comprises a sensor for sensing the presence of anaesthetic agent in gas flow from the machine, the sensor is provided on an inlet side of the device, wherein the suction means is provided upstream of the capture canister/s and downstream of the sensor, in which the sensor can activate the suction means when anaesthetic agent is detected, whereupon the suction means pushes gas through the or one or more of the canisters under positive pressure.