Smart cable for coupling a medical sensor to an electronic patient monitor

• US 9,554,739 B2
• Filed: 09/29/2009
• Issued: 01/31/2017
• Est. Priority Date: 09/29/2009
• Status: Active Grant

• Current Assignee: Covidien LP (Medtronic Plc)
• Original Assignee: Covidien LP (Medtronic Plc)
• Inventors: Lisogurski, Daniel
• Primary Examiner(s): Whaley, Pablo S
• Application Number:
  US12/568,944
• Publication Number:
  US 20110077473A1
• Time in Patent Office: 2,681 Days
• Field of Search: None
• US Class Current: 1/1
• 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 5/0205 Simultaneously evaluating both cardiovascular conditions and different types of body conditions, e.g. heart and respiratory condition
• CPC Class Codes: A61B 5/02416 using photoplethysmograph signals, e.g. generated by infrared radiation A61B5/14552 takes precedence
• 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 5/6826 Finger
• CPC Class Codes: A61B 5/6838 Clamps or clips
• CPC Class Codes: A61B 5/7225 Details of analog processing, e.g. isolation amplifier, gain or sensitivity adjustment, filtering, baseline or drift compensation A61B5/30, A61B5/316 take precedence; transformers for specific applications H01F38/00; amplifiers H03F
• CPC Class Codes: G16H 40/63 for local operation
• CPC Class Codes: G16H 40/67 for remote operation

Abstract

Systems, methods, and devices for intercommunication between a medical sensor and an electronic patient monitor are provided. For example, one embodiment of a system for communicably coupling a medical sensor to an electronic patient monitor may include a sensor-side communication connector and a monitor-side communication connector. The sensor-side communication connector may be capable of receiving a raw physiological measurement signal from the medical sensor, and the monitor-side communication connector may be capable of providing a digital physiological measurement signal based at least in part on the raw physiological measurement signal to the electronic patient monitor via a data link.

Claims

1. A smart cable for communicably coupling a medical sensor to an electronic patient monitor comprising:

a photoplethysmographic sensor comprising an emitter configured to transmit light at one or more wavelengths into tissue, a detector configured to generate an analog signal based on light received at the detector after the light is transmitted into the tissue, and a sensor connector;

a first cable connector configured to connect to the sensor and to receive the analog signal from the photoplethysmographic sensor via the sensor connector, wherein the first cable connector is disposed on a first end of the cable and configured to removably couple the cable to the sensor connector such that the photoplethysmographic sensor and the sensor connector are removable from the cable;

a second cable connector configured to connect to a monitor connector associated with the electronic patient monitor and to transmit a digital signal to the electronic patient monitor, wherein the second cable connector is disposed on a second end of the cable and configured to removably couple the cable to the monitor connector;

interconnection cabling directly coupled to and between the first cable connector and the second cable connector;

an analog-to-digital converter disposed within the cable in the first cable connector, the second cable connector, or a combination thereof, that is configured to digitize the analog signal to obtain the digital signal; and

a processor housed within the cable, wherein the processor receives the digital signal from the analog-to digital converter, processes the digital signal to determine a physiological parameter based on the light received, and transmits the physiological parameter to the monitor when the second cable connector is coupled to the monitor connector.

2. The smart cable of claim 1, further comprising a user input structure configured to indicate instructions executable-by the electronic patient monitor-to the cable, wherein the user input structure comprises a switch or a button.

3. The smart cable of claim 2, comprising circuitry disposed in the first cable connector, the second cable connector, or the interconnection cabling, or any combination thereof, that is configured to determine the instructions executable by the electronic patient monitor.

4. The smart cable of claim 3, wherein the circuitry configured to determine the instructions executable by the electronic patient monitor is configured to determine the instructions by receiving and analyzing an initialization or configuration message, or a combination thereof, from the electronic patient monitor.

8. The smart cable of claim 1, wherein the cable comprises a dumb connector coupled to the second cable connector.

5. A smart cable for communicably coupling a medical sensor to an electronic patient monitor comprising:

a photoplethysmographic sensor comprising an emitter configured to transmit light at one or more wavelengths into tissue, a detector configured to generate an analog signal based on light received at the detector after the light is transmitted into the tissue, and a sensor connector;

a first cable connector configured to connect to the sensor connector and to receive the analog signal from the photoplethysmographic sensor via the sensor connector, wherein the first cable connector is disposed onto a first end of the cable and configured to removably couple the cable to the sensor connector on the photoplethysmographic sensor such that the photoplethysmographic sensor and the sensor connector are removable from the cable;

an analog-to-digital converter disposed within the cable that determines a digital signal based at least in part on the analog signal from the photoplethysmographic sensor;

a second cable connector configured to connect to a monitor connector disposed on the electronic patient monitor and to transmit to the electronic patient monitor software instructions for obtaining a first physiological measurement from the digital signal and configured to transmit the digital signal to the electronic patient monitor via instructions executable by the electronic patient monitor, wherein the second cable connector is disposed on a second end of the cable and configured to removably couple the cable to the monitor connector;

a non-volatile memory storing the software instructions used by the electronic patient monitor for obtaining the first physiological measurement from the digital signal;

interconnection cabling directly coupled to and between the first cable connector and the second cable connector; and

a processor carried by the first cable connector, the interconnection cabling, or the second cable connector that, when in operation, receives the digital signal from the analog-to-digital converter, and processes the digital signal to determine a second physiological measurement.

6. The smart cable of claim 5, wherein the second cable connector is configured to transmit the software instructions when the electronic patient monitor is initialized.

7. The smart cable of claim 5, wherein the second cable connector comprises the non-volatile memory having the software instructions stored therein, wherein the non-volatile memory is a serial peripheral interface boot.

9. The smart cable of claim 5, wherein the cable comprises a dumb connector coupled to the second cable connector.

10. The smart cable of claim 5, wherein the first cable connector is configured to receive the analog signal comprising a raw physiological measurement signal from the photoplethysmographic sensor.

11. The smart cable of claim 10, wherein the raw physiological measurement signal comprises a photoplethysmographic signal;

a respiration signal;

a temperature signal;

an electrocardiogram signal;

an electroencephalogram signal;

a blood pressure signal;

or a pulse transit time signal;

or any combination thereof.

12. The smart cable of claim 10, wherein the raw physiological measurement signal comprises an analog signal, wherein the first cable connector is configured to digitize the raw physiological measurement signal to obtain a digitized raw physiological measurement signal, and wherein the second cable connector is configured to receive the digitized raw physiological measurement signal from the first cable connector.

17. The smart cable of claim 5, wherein the software instructions are for determining a blood oxygen saturation based on the digital signal.

13. A smart cable for communicably coupling a medical sensor to an electronic patient monitor comprising:

a photoplethysmographic sensor comprising an emitter configured to transmit light at one or more wavelengths into tissue, a detector configured to generate an analog signal based on the light received at the detector after the light is transmitted into the tissue, and a sensor connector;

a first cable connector configured to connect to the sensor connector and to receive the analog signal from the photoplethysmographic sensor via the sensor, wherein the first cable connector is disposed on a first end of the cable and configured to removably couple the cable to the sensor connector such that the photoplethysmographic sensor and the sensor connector are removable from the cable;

a second cable connector configured to connect to a monitor connector disposed on the electronic patient monitor and to transmit to the electronic patient monitor a physiological parameter associated with the light received from the detector, wherein the second cable connector is disposed on a second end of the cable and configured to removably couple the cable to the monitor connector;

interconnection cabling directly coupled to and between the first cable connector and the second cable connector;

a user input structure disposed on the first cable connector and accessible to a user of the cable, wherein the user input structure is configured to select instructions executable by the electronic patient monitor, wherein the instructions are selected from a group of communication instructions by placing the user input structure in a first position;

an analog-to-digital converter disposed within the cable in the first cable connector, the second cable connector, or a combination thereof, that is configured to digitize the analog signal to obtain a digital signal; and

a processor disposed in the first cable connector, the interconnection cabling, or the second cable connector that, when in operation, receives the digital signal from the analog-to-digital converter, processes the digital signal to determine the physiological parameter, and transmits the physiological parameter to the electronic patient monitor when the connector is coupled to the monitor.

14. The smart cable of claim 13, comprising circuitry disposed in the first cable connector, the second cable connector, or the interconnection cabling, or any combination thereof, that is configured to determine the instructions selected by the user input structure and transmit the physiological parameter via the instructions.

15. The smart cable of claim 13, wherein second instructions are selected when the user input structure is in a second position.

16. The smart cable of claim 13, wherein the user input structure comprises a button or switch.