Patent ID: 8887724

Claim:
An oxygen sensor seat assembly for connecting a breathing system gas path of an anesthesia machine and an oxygen sensor unit, the assembly comprising: an oxygen sensor seat comprising a gas flow passage, wherein the gas flow passage comprises a valve port that is configured to permit gas in the breathing system gas path to flow into the gas flow passage, wherein the gas flow passage comprises an input section and an output section; and a control valve that is configured to transition between an open position in which the valve port is open and a closed position in which the control valve closes the valve port, wherein the control valve is configured to automatically transition to the open position and gas in said breathing system gas path flow through said output section, said oxygen sensor unit and said input section in sequence when the oxygen sensor unit is coupled to the oxygen sensor seat, and wherein the control valve is configured to automatically transition to the closed position when the oxygen sensor unit is decoupled from the oxygen sensor seat.