Method and apparatus for collection of waste anesthetic gases

A method to collect waste anesthetic gases from an exhaust gas flow from an exhaust of an anesthesia delivery system having a gas collection chamber having a first port, a second port, and a third port, said method comprising the steps of:

• using first port as an input port to said gas collection chamber, and placing said input port in fluid connection with an exhaust of said anesthesia system and receiving, via said input port, a first gas flow discharged from said anesthesia delivery system, said exhaust gas flow including a waste anesthetic gas component;
• using said second port as an output port from said gas collection chamber, and placing said output port in fluid connection to a vacuum system and, from said output port, evacuating an evacuation gas flow from said gas collection chamber;
• and
• said third port being a bidirectional port to and from said gas collection chamber, and placing a regenerative adsorbing unit in said bidirectional port and, with said regenerative adsorbing unit, adsorbing or desorbing said waste anesthetic gas component dependent on gas flow through said regenerative adsorbing unit, and via said bidirectional port, placing said gas collection chamber in fluid communication with an ambient environment surrounding said gas collection chamber allowing an output gas flow to exit from said gas collection chamber through said regenerative adsorbing unit with said waste anesthetic gas component being adsorbed in said regenerative adsorbing unit, and via said bidirectional port, allowing a regenerative ambient air input gas flow to enter into said gas collection chamber through said regenerative adsorbing unit, causing said waste anesthetic gas component to be desorbed from said regenerative gas adsorbing unit and to exit said gas collection chamber through said output port together with said evacuation gas flow.