Method and apparatus for controlling an alarm while monitoring

• US 7,079,035 B2
• Filed: 05/19/2003
• Issued: 07/18/2006
• Est. Priority Date: 05/19/2003
• Status: Expired due to Term

• Current Assignee: GE Medical Systems Information Technologies Incorporated (GE Healthcare Technologies, Inc.)
• Original Assignee: GE Medical Systems Information Technologies Incorporated (GE Healthcare Technologies, Inc.)
• Inventors: Hutchinson, George M., Sitzman, David A., Bock, Elizabeth A.
• Primary Examiner(s): Hofsass, Jeffery
• Assistant Examiner(s): Mehmood, Jennifer
• Application Number:
  US10/440,626
• Publication Number:
  US 20040236187A1
• Time in Patent Office: 1,156 Days
• Field of Search: 340/573.1, 340/500, 340/501, 340/539, 340/5.8, 600/300, 600/301, 600/306, 600/323, 600/324, 600346-348, 705/2, 705/3, 607 30- 32, 607/60
• US Class Current: 340/573.1
• CPC Class Codes: A61B 5/02405 Determining heart rate variability
• CPC Class Codes: A61B 5/02455 provided with high/low alarm devices
• 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
• CPC Class Codes: G16H 40/63 for local operation
• CPC Class Codes: G16H 40/67 for remote operation

Abstract

A method for monitoring a subject can include acquiring data from the subject, and dynamically adjusting an alarm limit based on the data. The method can also comprise determining a first value that is typical for the subject for the characteristic being monitored, determining a second value for the characteristic being monitored, and generating a comparison based on the two values. The method could also comprise setting a threshold for a characteristic being monitored, and decreasing the alarm limit if the data crosses the threshold. The method could also include setting an extremity limit. The following methods can be applied to the monitoring of a healthcare patient, or other subjects of interest. Also, the values used in the monitoring of the subject can be configured to be transferable from one monitor to another.

Claims

1. A method for monitoring of a patient, comprising:

acquiring data from the patient;

setting a threshold; and

dynamically adjusting an alarm criteria based on the data at the time the data exceeds the threshold wherein the alarm criteria includes an alarm limit, and the alarm limit is dynamically adjusted based on the data, and further wherein the alarm limit is pre-configured to decrease over time.

2. The method of claim 1, further comprising generating an alarm based on whether the data meets the alarm criteria.

3. The method of claim 1, further comprising determining a value that is typical for the patient for the characteristic being monitored.

4. The method of claim 3, wherein determining the typical value comprises calculating the typical value based on a plurality of acquired data points.

5. The method of claim 1, wherein:

the alarm criteria comprises

an alarm limit whose value is set based on a value that is typical for a characteristic being monitored; and

an alarm limit that represents a value that is extreme for the characteristic being monitored; and

the alarm limit based on the typical value is dynamically adjusted based on the data.

6. The method of claim 5, further comprising sending an alarm if the data crosses the extreme alarm limit or if the data crosses the alarm limit based on the typical value.

7. The method of claim 1, further comprising determining a value that represents a typical value for the patient for the characteristic being monitored, wherein the threshold is set based on the typical value.

8. The method of claim 1, further comprising determining the alarm criteria based on a tolerance factor.

9. A monitoring system for monitoring a characteristic of a subject, comprising:

a data acquisition device configured to acquire data from a subject of interest; and

a processor configured to dynamically adjust an alarm criteria based on the data acquired from the subject, wherein the processor adjusts the alarm criteria at the time the data exceeds a threshold wherein the processor dynamically adjusts the alarm criteria by dynamically adjusting an alarm limit wherein the alarm limit is pre-configured to decrease over time.

10. The monitoring system of claim 9, further comprising an alarm sending device configured to send an alarm based on whether the data acquired from the patient meets the alarm criteria.

11. The monitoring system of claim 9, wherein the processor is configured to set an extremity limit.

12. A method of patient physiologic monitoring comprising:

receiving a real-time physiologic data stream from a patient;

calculating a representative value using the real-time physiologic data stream;

calculating at least one threshold based on the representative value;

monitoring the real-time physiologic data stream to determine if it has crossed the at least one threshold; and

calculating an alarm limit when the real-time physiologic data stream crosses the at least one threshold, the alarm limit based on the representative value wherein the alarm limit is pre-configured to decrease over time.

13. The method of claim 12, further comprising generating an alarm when the physiologic data stream crosses the alarm threshold.

14. A method as described in claim 12, wherein calculating a representative value comprises incrementing the representative value when the real-time physiologic data stream rises above the representative value.

15. A method as described in claim 12, wherein calculating a representative value comprises decrementing the representative value when the real-time physiologic data stream drops below the representative value.

16. A method as described in claim 12, wherein calculating at least one threshold comprises calculating the at least one threshold as a percentage of the representative value.

17. A method as described in claim 12, further comprising:

continuously comparing the real-time physiologic data stream to at least one extremity limit; and

generating an alarm if the physiologic data stream crosses the at least one extremity limit.

18. A method as described in claim 12, further comprising networking the representative value such that when a patient is moved to any of a plurality of networked monitors, the monitors use the same representative value.

19. The method of claim 12, wherein calculating the alarm limit comprises calculating the alarm limit based on an excursion value and a decay rate.

20. A method for monitoring of a patient, comprising:

acquiring data from the patient; and

dynamically adjusting a threshold based on the data;

setting an alarm limit; and

generating an alarm based on whether the data crosses the alarm limit wherein the alarm limit is pre-configured to decrease over time.

21. The method of claim 20, wherein a value of the alarm limit is set based on a value of the tracking threshold.

22. The method of claim 20, further comprising determining a value that is typical for the patient for the characteristic being monitored.