AUTOMATIC ESTIMATION OF PULSE DEFICIT

• US 20180055382A1
• Filed: 08/23/2016
• Published: 03/01/2018
• Est. Priority Date: 08/23/2016
• Status: Active Grant

• Current Assignee: Covidien LP (Medtronic Plc)
• Original Assignee: Covidien LP (Medtronic Plc)
• Inventors: WOODWARD, JONATHAN JAMES, RUEHLMANN, DIETRICH OTTO, BERLIN, DAVID BENJAMIN, BARTLETT, DANIEL WAYNE
• Granted Patent: US 10,463,261 B2
• Time in Patent Office: Days
• 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 5/0205 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 5/02438 with portable devices, e.g. worn by the patient
• CPC Class Codes: A61B 5/0245 by using sensing means generating electric signals, i.e. ECG signals
• CPC Class Codes: A61B 5/02455 provided with high/low alarm devices
• CPC Class Codes: A61B 5/318 Heart-related electrical modalities, e.g. electrocardiography [ECG]
• CPC Class Codes: A61B 5/6833 Adhesive patches
• CPC Class Codes: A61B 5/7246 using correlation, e.g. template matching or determination of similarity
• CPC Class Codes: A61B 5/746 Alarms related to a physiological condition, e.g. details of setting alarm thresholds or avoiding false alarms alarms per se G08B

Abstract

Methods, systems, and devices for determining pulseless electrical activity (PEA) are described. The method may include determining by using a first sensor on a person, a heart rate of the person based on sensed electrical activity of the person. A pulse rate of the person may be determined using a second sensor, the pulse rate of the person being based on at least one sensed parameter other than the sensed electrical activity. The method may then include determining a correlation of the determined heart rate and the determined pulse rate and then generating an alert event based at least in part on the correlation being outside of a predetermined threshold.

Claims

1. A method for determining a heart rate, comprising:

determining, using at least a first sensor on a person, a heart rate of the person based on sensed electrical activity of the person;

determining, using at least a second sensor on the person, a pulse rate of the person based on at least one sensed parameter other than the sensed electrical activity of the person;

determining a correlation of the determined heart rate and the determined pulse rate; and

generating an alert event based at least in part on the correlation being outside of a predetermined threshold.

2. The method of claim 1, wherein

determining the correlation comprises:

comparing a timing of the determined heart rate and the determined pulse rate.

3. The method of claim 1, wherein

determining the correlation comprises:

comparing a frequency domain analysis of the determined heart rate and the determined pulse rate.

4. The method of claim 1, wherein

the alert event indicates a Pulseless Electrical Activity (PEA) condition.

5. The method of claim 1, wherein

the sensed electrical activity of the person is an electrocardiogram (ECG) of the person.

6. The method of claim 1, wherein

the at least one sensed parameter is based on an arterial blood pressure of the person.

7. The method of claim 1, wherein

the predetermined threshold is comprised of a first predetermined threshold and a second predetermined threshold;

and

generating the alert event comprises;

generating a first category of alert event when the correlation is between the first predetermined threshold and the second predetermined threshold and generating a second category of alert event when the correlation is outside of both the first predetermined threshold and the second predetermined threshold.

8. The method of claim 1, wherein

determining the correlation comprises:

determining the correlation over a period of time where multiple periods of the person'"'"'s heart rate and pulse rate are determined.

9. The method of claim 1, further comprising:

remotely updating the predetermined threshold.

10. The method of claim 1, further comprising:

transmitting the alert event to a central station via a network.

11. The method of claim 10, further comprising:

storing the alert event for later transmission if the network is not available for transmission.

12. The method of claim 10, further comprising:

transmitting, with the alert event, the determined heart rate and the determined pulse rate.

13. The method of claim 1, wherein

determining the pulse rate comprises:

obtaining a sensed parameter via an accelerometer, oximeter, or an optical pulse rate monitor.

14. The method of claim 1, wherein

the correlation occurs on a device configured for use with the at least first sensor and the at least second sensor.

15. The method of claim 1, further comprising:

transmitting the determined heart rate and the determined pulse rate of the person to a central station via a network, wherein the correlation occurs at the central station.

16. An apparatus for determining a heart rate, in a system comprising:

a processor;

memory in electronic communication with the processor; and

instructions stored in the memory and operable, when executed by the processor, to cause the apparatus to;

determine, using at least a first sensor on a person, a heart rate of the person based on sensed electrical activity of the person;

determine, using at least a second sensor on the person, a pulse rate of the person based on at least one sensed parameter other than the sensed electrical activity of the person;

determine a correlation of the determined heart rate and the determined pulse rate; and

generate an alert event based at least in part on the correlation being outside of a predetermined threshold.

17. The apparatus of claim 16, wherein the instructions operable to cause the apparatus to determine the correlation comprise instructions operable to cause the apparatus to:

compare a timing of the determined heart rate and the determined pulse rate.

18. The apparatus of claim 16, wherein the instructions operable to cause the apparatus to determine the correlation comprise instructions operable to cause the apparatus to:

compare a frequency domain analysis of the determined heart rate and the determined pulse rate.

19. The apparatus of claim 16, wherein

the alert event indicates a Pulseless Electrical Activity (PEA) condition.

20. An apparatus for determining a heart rate, comprising:

means for determining, using at least a first sensor on a person, a heart rate of the person based on sensed electrical activity of the person;

means for determining, using at least a second sensor on the person, a pulse rate of the person based on at least one sensed parameter other than the sensed electrical activity of the person;

means for determining a correlation of the determined heart rate and the determined pulse rate; and

means for generating an alert event based at least in part on the correlation being outside of a predetermined threshold.