Oximetry assembly

• US 9,597,023 B2
• Filed: 04/29/2013
• Issued: 03/21/2017
• 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:
  US13/872,501
• Publication Number:
  US 20130237782A1
• Time in Patent Office: 1,422 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. An oximetry assembly comprising:

a cable assembly including a proximal end and a distal end;

an oximetry sensor located at the distal end of the cable assembly, the oximetry sensor configured to attach to a finger and comprising at least one emitter and at least one detector, the at least one emitter configured to transmit light at one or more wavelengths into tissue, the at least one detector configured to receive the light after the light passes through or is reflected by the tissue and to generate raw oximetry data based on the light received;

an analog-to-digital converter housed within the cable assembly and configured to receive the raw oximetry data from the oximetry sensor and to digitize the raw oximetry data into digital oximetry data;

a connector located at the proximal end of the cable assembly and configured to removably couple the cable assembly to a patient monitor;

an actuatable structure disposed on the cable assembly and configured to be actuated into a first configuration, wherein the actuatable structure generates a first signal indicative of a first selected protocol from a group of communication protocols in response to a user input that places the actuatable structure in the first configuration, and the actuatable structure comprises a button or a switch; and

a processor housed within the cable assembly and programmed to communicate using the group of communication protocols and to receive the digital oximetry data from the analog-to-digital converter, and the actuatable structure is configured to transmit the first signal indicative of the first selected protocol to the processor, and the processor is programmed to receive the first signal from the actuatable structure and to use the first selected protocol based on the first signal to transmit the digital oximetry data to the patient monitor, and the group of communication protocols comprise instructions decodable by the processor and the selected protocol comprises instructions decodable by the processor and the patient monitor.

2. The oximetry assembly of claim 1, wherein the processor is programmed to determine when the digital oximetry data is encoded in a second protocol that is different from the selected protocol, and wherein the processor is programmed to translate the digital oximetry data from the second protocol to the selected protocol based on the determination.

3. The oximetry assembly of claim 1, wherein the cable assembly further comprises circuitry storing instructions for calculating oximetry measurements from digital oximetry data, and wherein the processor is programmed to read the instructions from the circuitry and to use the instructions to calculate oximetry measurements from the digital oximetry data received from the analog-to-digital converter.

4. The oximetry assembly of claim 1, wherein the cable assembly comprises circuitry that is housed within the cable assembly and that generates control signals to drive the at least one emitter of the oximetry sensor.

5. The oximetry assembly of claim 1, wherein the digital oximetry data includes blood oxygen saturation and pulse rate.

6. The oximetry assembly of claim 1, wherein the processor comprises a microprocessor and software programmed to perform one or both of measurements or calculations to determine oxygen saturation and pulse rate based on the digital oximetry data received from the analog-to-digital converter.

7. The oximetry assembly of claim 1, wherein the processor is programmed to download software updates from a remote source.

15. The oximetry assembly of claim 1, wherein the actuatable structure is configured to be actuated into a second configuration and generates a second signal indicative of a second selected protocol from the group of communication protocols in response to a second user input that places the actuatable structure in the second configuration, and the actuatable structure is configured to transmit the second signal to the processor, and the processor is programmed to receive the second signal and to use the second selected protocol to transmit the digital oximetry data to the patient monitor based on the second signal.

8. An oximetry assembly comprising:

a cable assembly including a proximal end and a distal end;

an oximetry sensor located at the distal end of the cable assembly, the oximetry sensor configured to attach to a finger and comprising at least one emitter and at least one detector, the at least one emitter configured to transmit light at one or more wavelengths into tissue, the at least one detector configured to receive the light after the light passes through or is reflected by the tissue and to generate raw oximetry data based on the light received;

an analog-to-digital converter housed within the cable assembly and configured to receive the raw oximetry data from the oximetry sensor and to digitize the raw oximetry data into digital oximetry data;

a connector located at the proximal end of the cable assembly, the connector configured to removably connect the oximetry sensor to a monitor and allow communication with the monitor through a data communication link; and

a processor housed within the cable assembly, and programmed to;

receive the digital oximetry data from the analog-to-digital converter;

send a first command in a first protocol to the monitor;

determine that the first protocol comprises instructions decodable by the monitor in response to receiving a valid response from the monitor based on the first command; and

transmit the digital oximetry data to the monitor using the first protocol when the processor receives the valid response.

9. The oximetry assembly of claim 8, further comprising circuitry housed within the cable assembly, the circuitry stores instructions for determining oximetry measurements from digital oximetry data, and the processor is programmed to provide the instructions to the monitor.

10. The oximetry assembly of claim 8, wherein the oximetry sensor is controlled by the processor.

11. The oximetry assembly of claim 8, wherein the digital oximetry data includes blood oxygen saturation and pulse rate.

12. The oximetry assembly of claim 8, wherein the processor comprises a microprocessor and software programmed to perform one or both of measurements or calculations to determine oxygen saturation and pulse rate based on the digital oximetry data received from the analog-to-digital converter.

13. The oximetry assembly of claim 8, wherein the data communication link includes one of a serial peripheral interface (SPI), a universal serial bus (USB) interface, a universal asynchronous receiver /transmitter (UART), a two wire interface (TWI), or an RS232 interface.

14. The oximetry assembly of claim 8, wherein the processor is programmed to download software updates from a remote source.

16. The oximetry assembly of claim 8, wherein the processor is programmed to send a second command in a second protocol to the monitor if a valid response is not received by the processor in response to the first command, to determine that the second protocol comprises instructions decodable by the monitor in response to receiving a valid response from the monitor in response to the second command, and to transmit the digital oximetry data to the monitor using the second protocol when the processor receives the valid response in response to the second command.

17. The oximetry assembly of claim 8, wherein the oximetry assembly comprises a memory, and wherein the processor is programmed to store the protocol of the monitor determined by the processor in the memory.