Patent ID: 6850788

Claim:
A communications adapter which is plug compatible with a noninvasive pulse oximetry sensor and which is plug compatible with a pulse oximeter capable of communicating with sensor through conventional cabiling, the communications adapter comprising: a sensor interface configured to receive a sensor signal from a noninvasive pulse oximetry sensor through a sensor connector which is plug compatible with said sensor; a transmitter that modulates a first baseband signal responsive to said sensor signal so as to generate a transmit signal: a receiver that demodulates a receive signal corresponding to said transmit signal so as to generate a second baseband signal corresponding to said first baseband signal; and a monitor interface including a monitor connector which is plug compatible with a sensor port of a monitor that is capable of communicating with said sensor through conventional cabling, wherein said monitor interface is configured to communicate a waveform responsive to said second baseband signal to said a sensor port of said monitor, said waveform adapted to said monitor so that measurements derived by said monitor from said waveform are generally equivalent to measurements derivable from said sensor signal.