Physiological measurement communications adapter
View Patent ↗A sensor interface is configured to receive a sensor signal. A transmitter modulates a first baseband signal responsive to the sensor signal so as to generate a transmit signal. A receiver demodulates a receive signal corresponding to the transmit signal so as to generate a second baseband signal corresponding to the first baseband signal. Further, a monitor interface is configured to communicate a waveform responsive to the second baseband signal to a sensor port of a monitor. The waveform is adapted to the monitor so that measurements derived by the monitor from the waveform are generally equivalent to measurements derivable from the sensor signal. The communications adapter may further comprise a signal processor having an input in communications with the sensor interface, where the signal processor is operable to derive a parameter responsive to the sensor signal and where the first baseband signal is responsive to the parameter. The parameter may correspond to at least one of a measured oxygen saturation and a pulse rate.
1. A communications adapter comprising:
a sensor interface configured to receive a sensor signal;
a signal processor having an input in communication with said sensor interface, said signal processor operable to derive a parameter responsive to said sensor signal;
a transmitter that modulates a first baseband signal responsive to said parameter 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 configured to communicate a waveform responsive to said second baseband signal to a sensor port of a 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.
2. The communications adapter according to claim 1 wherein said parameter corresponds to at least one of a measured oxygen saturation and a pulse rate.
3. The communications adapter according to claim 2 further comprising a waveform generator that synthesizes said waveform from a predetermined shape.
4. The communications adapter according to claim 3 wherein said waveform generator synthesizes said waveform at a frequency adjusted to be generally equivalent to said pulse rate.
5. The communications adapter according to claim 3 wherein said waveform has a first amplitude and a second amplitude, said waveform generator configured to adjust said amplitudes so that measurements derived by said monitor are generally equivalent to said measured oxygen saturation.
6. A communications adapter method comprising the steps of:
inputting a sensor signal at a patient location;
wirelessly communicating patient data derived from said sensor signal between said patient location and a monitor location;
constructing a waveform at said monitor location responsive to said derived patient data; and
providing said waveform to a monitor via a sensor port, said waveform constructed so that said monitor calculates a parameter generally equivalent to a measurement derivable from said sensor signal.
7. The communications adapter method according to claim 6 wherein said communicating step comprises the substeps of:
deriving a conditioned signal from said sensor signal;
calculating a parameter signal from said conditioned signal; and
transmitting said parameter signal from said patient location to said monitor location.
8. The communications adapter method according to claim 7 wherein said constructing step comprises the substep of synthesizing said waveform from said parameter signal.
9. The communications adapter method according to claim 6 wherein said communicating step comprises the substeps of:
deriving a conditioned signal from said sensor signal;
transmitting said conditioned signal from said patient location to said monitor location.
10. The communications adapter method according to claim 9 wherein said constructing step comprises the substeps of:
demodulating said conditioned signal; and
re-modulating said conditioned signal to generate said waveform.
11. The communications adapter method according to claim 6 wherein said providing step comprises the substeps of:
inputting a monitor signal from an LED drive output of said sensor port;
modulating said waveform in response to said monitor signal; and
outputting said waveform on a detector input of said sensor port.
12. A communications adapter comprising:
a means for inputting a sensor signal and outputting a conditioned signal;
a means for sending data responsive to said conditioned signal;
a means for receiving said data;
a means for constructing a waveform from said data so that measurements derived by a monitor from said waveform are generally equivalent to measurements derivable from said sensor signal; and
a means for communicating said waveform to a sensor port of said monitor.
13. The communications adapter according to claim 12 further comprising a means for deriving a parameter signal from said conditioned signal, said data comprising said parameter signal.
14. The communications adapter according to claim 13 wherein said means for constructing a waveform comprises a means for synthesizing said waveform from said parameter signal.
15. The communications adapter according to claim 12 wherein said data comprises said conditioned signal and said means for constructing a waveform comprises a means for modulating said conditioned signal in response to said monitor.