Physiological monitoring methods and systems utilizing distributed algorithms

• US 10,213,121 B2
• Filed: 02/19/2016
• Issued: 02/26/2019
• Est. Priority Date: 02/19/2015
• Status: Active Grant

• Current Assignee: Covidien LP (Medtronic Plc)
• Original Assignee: Covidien LP (Medtronic Plc)
• Inventors: Lisogurski, Daniel
• Primary Examiner(s): Voorhees, Catherine
• Assistant Examiner(s): Patel, Natasha
• Application Number:
  US15/047,770
• Publication Number:
  US 20160242658A1
• Time in Patent Office: 1,103 Days
• CPC Class Codes: A61B 2560/0443 Modular apparatus
• CPC Class Codes: A61B 2560/0475 Special features of memory means, e.g. removable memory cards
• CPC Class Codes: A61B 2562/08 Sensors provided with means for identification, e.g. barcodes or memory chips
• CPC Class Codes: A61B 2562/225 Connectors or couplings
• CPC Class Codes: A61B 5/02416 using photoplethysmograph signals, e.g. generated by infrared radiation A61B5/14552 takes precedence
• CPC Class Codes: A61B 5/1455 using optical sensors, e.g. spectral photometrical oximeters
• CPC Class Codes: A61B 5/369 Electroencephalography [EEG] devices for psychotechnics A61B5/16
• CPC Class Codes: A61B 5/4821 Determining level or depth of anaesthesia A61B5/1106 takes precedence
• CPC Class Codes: A61B 5/7203 for noise prevention, reduction or removal
• CPC Class Codes: A61B 5/7264 Classification of physiological signals or data, e.g. using neural networks, statistical classifiers, expert systems or fuzzy systems neural networks per se G06N3/00; expert systems per se G06N5/00
• CPC Class Codes: A61B 5/7278 Artificial waveform generation or derivation, e.g. synthesising signals from measured signals A61B5/327 takes precedence

Abstract

Systems and methods are provided for operating a physiological monitoring system that comprises a distributed algorithm. The physiological monitoring system ma comprise a sensor and a physiological monitor that may be communicatively coupled with the sensor. The sensor may store a first executable code segment and the physiological monitor may store a second executable code segment. The physiological monitor may be configured to receive the first executable code segment and execute the first and second executable code segments to determine at least one physiological parameter of a subject based on physiological signal provided by the sensor. The physiological monitor may be configured to delete or deactivate the first executable code segment. The physiological monitor may also store a configurable algorithm stage that may be configured based on algorithm configuration data received from the sensor.

Claims

1. A physiological monitoring system, comprising:

a sensor configured to;

store a first executable code segment; and

generate a photoplethysmographic (PPG) signal; and

a physiological monitor comprising;

a port communicatively coupled to the sensor, the port being configured to;

receive the first executable code segment from the sensor; and

receive the PPG signal from the sensor;

non-transitory memory configured to store a second executable code segment; and

at least one processor configured to;

execute the first executable code segment and the second executable code segment upon receiving the first executable code segment from the sensor to determine at least one physiological parameter of a subject based on the PPG signal; and

wherein the second executable code segment is operable without the first executable code segment; and

wherein the second executable code segment is maintained in the non-transitory memory of the physiological monitor subsequent to disconnection of the sensor from the port.

2. The physiological monitoring system of claim 1, wherein the at least one processor is configured to delete the first executable code segment or deactivate the first executable code segment in response to the sensor becoming communicatively disconnected from the port or in response to a second sensor becoming communicatively coupled to the port.

3. The physiological monitoring system of claim 1, wherein the at least one processor is configured to delete the first executable code segment or deactivate the first executable code segment after a predetermined amount of time has elapsed after the sensor becomes communicatively disconnected from the port.

4. The physiological monitoring system of claim 1, wherein execution of the first executable code segment and the second executable code segment results in a higher quality determination of the at least one physiological parameter than execution of the second executable code segment without the first executable code segment.

5. The physiological monitoring system of claim 1, wherein the at least one processor is configured to delete the first executable code segment from non-transitory memory of the physiological monitor.

6. The physiological monitoring system of claim 1, wherein the first executable code segment is encrypted, and wherein the at least one processor is configured to decrypt the first executable code segment.

7. A physiological sensor comprising:

at least one light source configured to generate a light signal;

at least one light detector configured to receive the light signal after the light signal has been attenuated by body tissue of a subject;

non-transitory memory configured to store a first executable code segment; and

a port configured to;

transmit the received light signal to a physiological monitor; and

transmit the first executable code segment to the physiological monitor, wherein the first executable code segment and a second executable code segment stored on the physiological monitor enable determination of a physiological parameter of the subject based on the light signal upon transmission of the first executable code segment to the physiological monitor, wherein the second executable code segment is operable without the first executable code segment, and wherein the first executable code segment is deleted after the physiological monitor becomes communicatively disconnected from the port.

8. The physiological sensor of claim 7, wherein the first executable code segment enables a higher quality determination of the physiological parameter than execution of the second executable code segment without the first executable code segment.

9. The physiological sensor of claim 7, wherein the first executable code segment is encrypted.

10. The physiological sensor of claim 7, wherein the first executable code segment is executed before the second executable code segment to determine the physiological parameter of the subject.

11. A method for monitoring a subject, the method comprising:

generating, using a photoplethysmographic (PPG) sensor, a PPG signal;

transmitting, using the PPG sensor, the PPG signal and a first executable code segment to a physiological monitor;

receiving, using the physiological monitor, the PPG signal and the first executable code segment from the sensor, wherein the physiological monitor comprises non-transitory memory that stores a second executable code segment;

executing, by at least one processor of the physiological monitor, the first executable code segment and the second executable code segment to determine at least one physiological parameter of a subject based on the PPG signal; and

deleting the first executable code segment from the physiological monitor after the PPG sensor becomes communicatively disconnected from the physiological monitor.

12. The method of claim 11, wherein the deleting the first executable code segment from the physiological monitor comprises deleting the first executable code segment in response to the PPG sensor becoming communicatively disconnected from the physiological monitor or in response to a second PPG sensor becoming communicatively coupled to the physiological monitor.

13. The method of claim 11, wherein the deleting the first executable code segment from the physiological monitor comprises deleting the first executable code segment after a predetermined amount of time has elapsed after the PPG sensor becomes communicatively disconnected from the physiological monitor.

14. The method of claim 11, further comprising decrypting, by the at least one processor of the physiological monitor, the first executable code segment.