PHYSIOLOGICAL MEASUREMENT DEVICE

• US 20190038143A1
• Filed: 10/11/2018
• Published: 02/07/2019
• Est. Priority Date: 03/25/2002
• Status: Active Grant

• Current Assignee: Masimo Corporation
• Original Assignee: Masimo Corporation
• Inventors: Al-Ali, Ammar
• Granted Patent: US 10,219,706 B2
• Time in Patent Office: Days
• CPC Class Codes: A61B 2560/0214 of power generation or supply
• CPC Class Codes: A61B 2562/222 Electrical cables or leads therefor, e.g. coaxial cables or ribbon cables
• CPC Class Codes: A61B 2562/227 Sensors with electrical connectors
• CPC Class Codes: A61B 5/0004 characterised by the type of physiological signal transmitted
• CPC Class Codes: A61B 5/0015 characterised by features of the telemetry system
• CPC Class Codes: A61B 5/002 Monitoring the patient using a local or closed circuit, e.g. in a room or building A61B5/0017 takes precedence
• CPC Class Codes: A61B 5/0024 for multiple sensor units attached to the patient, e.g. using a body or personal area network
• CPC Class Codes: A61B 5/0026 characterised by the transmission medium
• CPC Class Codes: A61B 5/0205 Simultaneously evaluating both cardiovascular conditions and different types of body conditions, e.g. heart and respiratory condition
• CPC Class Codes: A61B 5/021 Measuring pressure in heart or blood vessels A61B5/0205 takes precedence
• CPC Class Codes: A61B 5/02416 using photoplethysmograph signals, e.g. generated by infrared radiation A61B5/14552 takes precedence
• CPC Class Codes: A61B 5/02427 Details of sensor
• CPC Class Codes: A61B 5/02438 with portable devices, e.g. worn by the patient
• CPC Class Codes: A61B 5/1455 using optical sensors, e.g. spectral photometrical oximeters
• CPC Class Codes: A61B 5/14551 for measuring blood gases
• CPC Class Codes: A61B 5/14552 Details of sensors specially adapted therefor
• CPC Class Codes: A61B 5/30 Input circuits therefor
• CPC Class Codes: A61B 5/318 Heart-related electrical modalities, e.g. electrocardiography [ECG]
• CPC Class Codes: A61B 5/332 Portable devices specially adapted therefor
• CPC Class Codes: A61B 5/6824 Arm or wrist
• CPC Class Codes: A61B 5/6826 : Finger
• CPC Class Codes: A61B 5/6831 : Straps, bands or harnesses
• CPC Class Codes: A61B 5/6838 : Clamps or clips
• CPC Class Codes: A61B 5/72 : Signal processing specially adapted for physiological signals or for diagnostic purposes character recognition, recognising digital ink, document-oriented image-based pattern recognition G06V30/00; recognition or understanding of postal images G06V30/424
• CPC Class Codes: A61B 5/7228 : Signal modulation applied to the input signal sent to patient or subject; demodulation to recover the physiological signal modulation H03C
• CPC Class Codes: A61B 5/7271 : Specific aspects of physiological measurement analysis A61B5/316, A61B5/349 and A61B5/374 take precedence
• CPC Class Codes: A61B 5/742 : using visual displays A61B5/339 takes precedence
• CPC Class Codes: A61B 5/7425 : Displaying combinations of multiple images regardless of image source, e.g. displaying a reference anatomical image with a live image geometric transforms for image registration G06T3/14; enhancement using image fusion G06T5/50; algorithms for registration of images G06T7/30
• CPC Class Codes: A61B 5/7445 : Display arrangements, e.g. multiple display units
• CPC Class Codes: A61B 5/7475 : User input or interface means, e.g. keyboard, pointing device, joystick
• CPC Class Codes: G08B 21/0453 : worn on the body to detect health condition by physiological monitoring, e.g. electrocardiogram, temperature, breathing detecting, measuring or recording for diagnostic purposes A61B5/00
• CPC Class Codes: H04W 4/70 : Services for machine-to-machine communication [M2M] or machine type communication [MTC]
• CPC Class Codes: Y10S 128/903 : Radio telemetry

Abstract

A sensor interface is configured to receive a sensor signal. A transmitter generates a transmit signal. A receiver receives the signal corresponding to the transmit signal. Further, a monitor interface is configured to communicate a waveform to the monitor so that measurements derived by the monitor from the waveform are generally equivalent to measurements derivable from the sensor signal.

Claims

1. (canceled)

2. A pulse oximetry system comprising:

a receiving computing device comprising;

a signal receiver; and

a display capable of displaying physiological parameter and waveform data; and

a portable patient monitoring device comprising;

a light emitter configured to emit light into a tissue site a patient;

a light detector configured to output a sensor signal responsive to at least a portion of the emitted light after attenuation by tissue of the tissue site;

at least one user input mechanism configured to at least enable activation of the portable patient monitoring device in response to inputs from a user;

one or more signal processors configured to;

cause activation of the light emitter to emit light;

receive the sensor signal from the light detector, the sensor signal useable to determine physiological parameters including at least oxygen saturation, pulse rate, and perfusion index of the patient; and

perform a first processing of the sensor signal to generate a transmit signal;

a signal transmitter configured to wirelessly transmit the transmit signal to the receiving computing device; and

a battery configured to power the portable patient monitoring device including at least the one or more signal processors and the signal transmitter, wherein the receiving computing device is configured to;

receive the transmit signal from the portable patient monitoring device;

perform a second processing on the transmit signal in order to determine measurements of the physiological parameters including at least oxygen saturation, pulse rate, and perfusion index; and

cause display, on the display of the receiving computing device, of the measurements of the physiological parameters of the patient.

3. The pulse oximetry system of claim 2, wherein the one or more signal processors comprise at least:

a front-end processor configured to;

receive the sensor signal from the light detector; and

process the sensor signal to generate a conditioned signal by at least one of;

amplification, filtering, analog to digital conversion, buffering, data rate modification, digital filtering, adaptive filtering, smoothing, averaging, or frequency transforming; and

a signal processor configured to;

receive the conditioned signal from the front-end processor;

derive, from the conditioned signal, information indicative of the physiological parameters; and

provide the information indicative of the physiological parameters to the signal transmitter as the transmit signal.

4. The pulse oximetry system of claim 3, wherein the transmit signal comprises derived measurements of oxygen saturation, pulse rate, and perfusion index.

5. The pulse oximetry system of claim 3, wherein the transmit signal comprises raw data indicative of the sensor signal from the light detector.

6. The pulse oximetry system of claim 4, wherein the portable patient monitoring device further comprises:

a housing that houses at least the one or more signal processors, the signal transmitter, and the battery.

7. The pulse oximetry system of claim 6, wherein performing the second processing on the transmit signal comprises adapting or processing the transmit signal to be usable by the computing device for displaying measurements of oxygen saturation, pulse rate, and perfusion index on the display of the computing device.

8. The pulse oximetry system of claim 2, wherein the portable patient monitoring device further comprises:

a multiplexer configured to generate a single digital word or bit stream based at least in part on the sensor signal; and

an encoder configured to encode the single digital word or bit stream to generate a baseband signal,

wherein the signal transmitter is further configured to modulate the baseband signal with a carrier to generate the transmit signal.

9. The pulse oximetry system of claim 8, wherein the baseband signal comprises at least one of:

a single signal, multiple related signal components including in-phase signals, or multiple related signal components including quadrature signals.

10. The pulse oximetry system of claim 8, wherein the signal transmitter is further configured to transmit on multiple frequency channels.

11. The pulse oximetry system of claim 2, wherein the measurements of the physiological parameters comprise real time measurements.

12. The pulse oximetry system of claim 2, wherein the transmit signal includes at least waveform data.

13. The pulse oximetry system of claim 2, wherein the portable patient monitoring device is configured to download software to configure the portable patient monitor.

14. The pulse oximetry system of claim 2, wherein the receiving computing device comprises a housing including a plug that is compatible with a sensor port of a multi-parameter patient monitor.

15. The pulse oximetry system of claim 14, wherein performing the second processing on the transmit signal further comprises adapting the transmit signal to a monitor-compatible signal that is compatible with the sensor port of the multi-parameter patient monitor.

16. A portable patient monitoring device comprising:

a light emitter configured to emit light into a tissue site a patient;

a light detector configured to output a sensor signal responsive to at least a portion of the emitted light after attenuation by tissue of the tissue site;

at least one user input mechanism configured to at least enable activation of the portable patient monitoring device in response to inputs from a user;

one or more signal processing arrangements configured to;

cause activation of the light emitter to emit light;

receive the sensor signal from the light detector, the sensor signal useable to determine physiological parameters including at least oxygen saturation, pulse rate, and perfusion index of the patient; and

perform a first processing of the sensor signal to generate a transmit signal;

a signal transmitter configured to wirelessly transmit the transmit signal to a receiver computing device configured to perform a second processing on the transmit signal in order to determine and display measurements of the physiological parameters including at least oxygen saturation, pulse rate, and perfusion index; and

a battery configured to power the portable patient monitoring device including at least the one or more signal processing arrangements and the signal transmitter.

17. The portable patient monitoring device of claim 16, wherein the one or more signal processing arrangements comprise at least:

a front-end processor configured to;

receive the sensor signal from the light detector; and

process the sensor signal to generate a conditioned signal by at least one of;

amplification, filtering, analog to digital conversion, buffering, data rate modification, digital filtering, adaptive filtering, smoothing, averaging, or frequency transforming; and

a signal processor configured to;

receive the conditioned signal from the front-end processor;

derive, from the conditioned signal, information indicative of the physiological parameters; and

provide the information indicative of the physiological parameters to the signal transmitter as the transmit signal.

18. The portable patient monitoring device of claim 17 further comprising:

a housing that houses at least the one or more signal processing arrangements, the signal transmitter, and the battery.

19. The portable patient monitoring device of claim 18, wherein performing the second processing on the transmit signal, by the receiver computing device, comprises determining the measurements of the physiological parameters by at least adapting or processing the transmit signal to be usable for displaying measurements of oxygen saturation, pulse rate, and perfusion index on a display of the receiver computing device.

20. The portable patient monitoring device of claim 16 further comprising:

a multiplexer configured to generate a single digital word or bit stream based at least in part on the sensor signal; and

an encoder configured to encode the single digital word or bit stream to generate a baseband signal,

wherein the signal transmitter is further configured to modulate the baseband signal with a carrier to generate the transmit signal.

21. The portable patient monitoring device of claim 20, wherein the baseband signal comprises at least one of:

a single signal, multiple related signal components including in-phase signals, or multiple related signal components including quadrature signals.

22. The portable patient monitoring device of claim 21, wherein the signal transmitter is further configured to transmit on multiple frequency channels.

23. The portable patient monitoring device of claim 22, wherein the measurements of the physiological parameters comprise real time measurements.

24. The portable patient monitoring device of claim 23, wherein the transmit signal includes at least waveform data.

25. The portable patient monitoring device of claim 24, wherein the portable patient monitoring device is configured to download software to configure the portable patient monitor.

26. The portable patient monitoring device of claim 16, wherein the receiver computing device is further configured to be physically plug-compatible with a sensor port of a multi-parameter patient monitor, and adapt the transmit signal to a monitor-compatible signal that is communicatively compatible with the sensor port of the multi-parameter patient monitor.

27. A method of gathering physiological data from a patient, the method comprising:

providing a portable patient monitoring device according to claim 16;

affixing the portable patient monitoring device to the patient; and

activating the portable patient monitoring device to commence gathering of physiological data from the patient.

28. The method of claim 27, further comprising:

enabling the portable patient monitoring device to communicate with the receiver computing device configured to perform the second processing on the transmit signal in order to determine and display measurements of the physiological parameters including at least oxygen saturation, pulse rate, and perfusion index; and

causing the receiver computing device to display the measurement of the physiological parameters on a display of the receiving computing device.

29. The method of claim 28, further comprising:

causing the portable patient monitoring device to download software to configure the portable patient monitoring device.