Oximetry with remote display

• US 8,792,950 B2
• Filed: 06/04/2010
• Issued: 07/29/2014
• Est. Priority Date: 06/05/2009
• Status: Active Grant

• Current Assignee: Nonin Medical Incorporated
• Original Assignee: Nonin Medical Incorporated
• Inventors: Larsen, Christopher, Johnson, Timothy L., Blomberg, Scott Everett, Smith, Charles U., Parthasarathy, Jayant
• Primary Examiner(s): Laballe, Clayton E
• Assistant Examiner(s): Hancock, Dennis
• Application Number:
  US12/794,097
• Publication Number:
  US 20100312079A1
• Time in Patent Office: 1,516 Days
• Field of Search: 600/323
• US Class Current: 600/323
• CPC Class Codes: A61B 5/0002 Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network A61B5/07 takes precedence; transmission systems for measured values G08C; transmission H04B; transmission of digital information H04L; wireless communication networks H04W
• 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 5/742 using visual displays A61B5/339 takes precedence

Abstract

A device includes a first sensor coupler that is configured to receive a first input signal from a first sensor. The first input signal corresponds to a first physiological parameter and is based on optical excitation of a tissue. The device includes a processor coupled to the first sensor coupler. The processor is configured to generate an output signal based on the first input signal. The first physiological parameter is encoded in the output signal. The output signal differs from the first input signal. The device includes an output coupler configured to communicate the output signal to a remote device.

Claims

1. A device comprising:

a first sensor coupler configured to receive a first input signal from a first sensor, the first input signal corresponding to a non-pulsatile direct current (DC) component of a first physiological parameter and based on optical excitation of a tissue;

a processor coupled to the first sensor coupler, the processor configured to generate an output signal based on the first input signal, the first physiological parameter encoded in the output signal and the output signal differing from the first input signal, and wherein the output signal corresponds to a measure of tissue oxygenation; and

an output coupler configured to communicate the output signal to a remote device.

2. The device of claim 1 wherein the first sensor coupler includes at least one of an electrical connector and an optical connector.

3. The device of claim 1 wherein at least one of the first sensor coupler and the output coupler includes at least one of a wireless receiver or a wireless transmitter.

4. The device of claim 1 further including a second sensor coupler configured to receive a second input signal from a second sensor, the second input signal corresponding to a second physiological parameter and wherein the processor is coupled to the second sensor coupler, the output signal based on the second input signal.

5. The device of claim 1 further including a user-operable switch coupled to the processor.

6. The device of claim 1 wherein the processor is configured to generate a timing signal.

7. The device of claim 1 wherein the processor includes at least one of an amplifier, an analog-to-digital converter, a digital-to-analog converter, a multiplexer, and a filter.

8. The device of claim 1 wherein the output coupler includes at least one of an electrical connector and a wireless transmitter.

9. The device of claim 1 wherein the output signal is encoded with a calculated value configured for rendering on a visual display.

10. A method comprising:

exchanging a first timing signal with a first sensor, the first sensor configured to provide a detected signal corresponding to an optical property of a tissue correlated with the first timing signal;

receiving the detected signal;

processing the detected signal to generate an output signal, the output signal corresponding to a parameter of the tissue, the parameter based on a non-pulsatile direct current (DC) component of the detected signal, and the output signal different than the detected signal, the parameter corresponding to a measure of tissue oxygenation; and

communicating the output signal to a remote device.

11. The method of claim 10 wherein exchanging the first timing signal includes at least one of sending or receiving relative to the first sensor.

12. The method of claim 10 further including exchanging a second timing signal relative to a second remote sensor based on the exchanging of the first timing signal.

13. The method of claim 10 wherein receiving the detected signal includes receiving wirelessly.

14. The method of claim 10 wherein processing the detected signal includes at least one of amplifying, converting to digital, converting to analog, multiplexing, and filtering.

15. The method of claim 10 wherein communicating includes transmitting wirelessly.

16. A system comprising:

at least one sensor having a detector and configured to provide a sensor signal corresponding to an optical property of tissue;

a processor coupled to receive the sensor signal and configured to generate an output signal using the sensor signal, the output signal corresponding to a non-pulsatile direct current (DC) component of a parameter of the tissue, the output signal different than the sensor signal, the parameter corresponding to a measure of tissue oxygenation; and

a monitor coupled to receive the output signal and configured to render a user perceivable representation of the parameter.

17. The system of claim 16 wherein the at least one sensor includes at least one of a plurality of emitters and a plurality of detectors.

18. The system of claim 16 wherein the at least one sensor is coupled to the processor by a wireless link.

19. The system of claim 18 wherein the wireless link includes at least one of a fiber optic element and a radio frequency transmitter.

20. The system of claim 16 wherein the processor includes at least one of an analog processor, a digital processor, a filter, a converter, and an amplifier.

21. The system of claim 16 wherein the monitor includes at least one of a visual display and a printer.