Patent ID: 7836882

Claim:
An electronic anesthesia delivery apparatus, comprising: a chassis comprising at least one anesthetic vaporizer; a carrier gas input port in flow communication with said at least one anesthetic vaporizer; said vaporizer having an inlet in flow communication with said carrier gas input port, a precision orifice downstream of said inlet and an electronic control valve downstream of said precision orifice, said at least one anesthetic vaporizer having a chamber wherein a liquid anesthetic agent is disposed, said chamber being downstream of said electronic control valve, a carrier gas conduit extending into said chamber beneath an upper level of said liquid anesthetic agent, said chamber having an outlet port disposed above said upper level of said liquid anesthetic agent, wherein a carrier gas passes through a porous diffusing portion at an end of said carrier gas conduit and bubbles through said liquid anesthetic agent forming an anesthetic gas in fluid communication with said outlet port of said chamber; an electronic touchscreen display mounted to said chassis for controlling a carrier gas flow rate to said at least one anesthetic vaporizer and concentration of said anesthetic gas delivered to a patient; a circuit board having an input/output portion, said electronic touchscreen display in electronic communication with said circuit board, a temperature signal received by said input/output portion indicating temperature of said anesthetic agent, said circuit board further in electronic communication with said electronic control valve to intermittently open and close the electronic control valve in automated fashion in order to vary said carrier gas flow rate through said chamber, said carrier gas flow rate being used in combination with said temperature signal to control a rate of vaporization and concentration of said anesthetic agent in said anesthetic gas; a bleed valve in fluid communication with a re-breathing circuit, said valve having at least one closed position to open said re-breathing circuit and direct exhaled gas to an absorber which scrubs carbon dioxide and allows re-breathing of anesthetic, said valve having at least a second open position to close said re-breathing circuit and to direct said exhaled gas to atmosphere.