System and method for identifying and displaying medical data which violate programmable alarm conditions

• US 5,749,907 A
• Filed: 02/18/1997
• Issued: 05/12/1998
• Est. Priority Date: 02/18/1997
• Status: Expired due to Term

• Current Assignee: Pacesetter Incorporated (Abbott Laboratories Incorporated)
• Original Assignee: Pacesetter Incorporated (Abbott Laboratories Incorporated)
• Inventors: Mann, Brian M.
• Primary Examiner(s): Kamm, William E.
• Application Number:
  US08/801,281
• Time in Patent Office: 448 Days
• Field of Search: 607/27, 128/903, 128/920, 128/923, 128/630, 128/697
• US Class Current: 607/27
• CPC Class Codes: A61N 1/37 Monitoring; Protecting
• CPC Class Codes: G16H 40/63 for local operation
• CPC Class Codes: Y10S 128/903 Radio telemetry

Abstract

A system and method for identifying and displaying medical data items which violate programmable alarm conditions are provided. The system of the present invention automatically alerts the medical practitioner if changes or deviations in parametric and physiologic medical data items violate programmable alarm conditions. The system also provides the medical practitioner with the ability to edit, disable, and enable programmable alarm conditions associated with one or more parametric and physiologic medical data items. The system also allows the medical practitioner to select a range of medical data to be used when the determination of whether any alarm conditions were violated is made.

Claims

1. A diagnostic system for use with an implantable medical device, the system comprising:

telemetry means for receiving medical data transmitted by the medical device;

means for defining at least one alarm condition;

long-term storage means for storing the at least one alarm condition;

first control means for applying the at least one alarm condition to the medical data to determine if any medical data values violate at least one alarm condition; and

second control means for marking portions of the medical data which violate at least one alarm condition.

2. The system of claim 1, wherein the medical data comprise at least one data item, each of the at least one data items comprising at least one medical data value.

3. The system of claim 2, wherein the portions of the medical data marked by the second control means comprise at least one data item having one or more of the at least one medical data values which violate the at least one alarm condition.

4. The system of claim 3, further comprising first selection means for selecting the at least one medical data value from each of the at least one data items, wherein each of the at least one medical data values is at least one of:

(a) recently acquired medical data values received during a current transmission of medical data from the implantable medical device, and

(b) previously acquired medical data values received during a previous transmission of medical data from the implantable medical device.

5. The system of claim 4, further comprising:

means for defining at least one alarm condition record;

second selection means for selecting a data item from the at least one data items;

third selection means for selecting an alarm condition record from at the least one alarm condition records;

means for associating the selected alarm condition record with the selected data item; and

means for associating one or more of the at least one alarm condition with the selected at least one alarm condition record, wherein the first control means applies one or more of the selected alarm condition record'"'"'s at least one alarm condition to the at least one medical data value selected by the first selection means to determine if the selected at least one medical data value violates one or more of the at least one alarm condition.

6. The system of claim 5, wherein each of the at least one alarm condition associated with the at least one alarm condition record is at least one of:

(a) a lower alarm threshold, (b) an upper alarm threshold, and (c) a change alarm threshold.

7. The system of claim 6, wherein if the at least one alarm condition comprises the lower alarm threshold, the system further comprises fifth selection means for selecting the lower alarm threshold from a lower alarm threshold set comprising at least one lower alarm threshold, such that when the first control means applies the selected lower alarm threshold to the at least one medical data value selected by the first selection means, and the at least one selected medical data value comprises at least one medical data value which is lower than the selected lower alarm threshold, the first control means determines that the associated data item has at least one medical data value which violates the at least one alarm condition.

8. The system of claim 7, wherein the lower alarm threshold set further comprises a null value, such that if the null value is selected by the fifth selection means for the lower alarm threshold, the first control means does not apply the lower alarm threshold to the at least one medical data value selected by the first selection means.

9. The system of claim 6, wherein if the at least one alarm condition comprises the upper alarm threshold, the system further comprises sixth selection means for selecting the upper alarm threshold from an upper alarm threshold set comprising at least one upper alarm threshold, such that when the first control means applies the selected upper alarm threshold to the at least one medical data value selected by the first selection means, and the selected at least one medical data value comprises at least one medical data value which is higher than the selected upper alarm threshold, the first control means determines that the associated data item has at least one medical data value which violates the at least one alarm condition.

10. The system of claim 9, wherein the upper alarm threshold set further comprises a null value, such that if the null value is selected by the sixth selection means for the upper alarm threshold, the first control means does not apply the upper alarm threshold to the at least one medical data value selected by the first selection means.

11. The system of claim 6, further comprising means for determining a baseline, and means for associating the baseline with the selected alarm condition record if the selected alarm condition record comprises the change alarm threshold.

12. The system of claim 11, wherein the means for determining a baseline sets the baseline to a constant value.

13. The system of claim 12, wherein the means for determining a baseline derives the baseline for the selected alarm condition record from at least one previously acquired medical value.

14. The system of claim 13, further comprising third control means for determining at least one data item change value, wherein the at least one data item change value is representative of the difference between each of the at least one medical data values selected by the first selection means, and the selected data item alarm condition record'"'"'s associated baseline.

15. The system of claim 14, wherein the system further comprises seventh selection means for selecting the change alarm threshold from a change alarm threshold set comprising at least one change alarm threshold, such that when the first control means applies the selected change alarm threshold to the associated data item'"'"'s at least one data item change value, and the at least one data item change value is higher than the selected change alarm threshold, the first control means determines that the associated data item has at least one data item change value which violates the at least one alarm condition.

16. The system of claim 15, wherein the change alarm threshold set further comprises a null value, such that if the null value is selected by the seventh selection means for the change alarm threshold, the first control means does not apply the change alarm threshold to the at least one medical data value selected by the first selection means.

17. The system of claim 16, wherein the change alarm threshold set further comprises means for deriving the change alarm threshold.

18. The system of claim 4, wherein each of the at least one alarm condition records further comprises an activity flag, wherein the system further comprises fourth selection means for setting and removing and removing the activity flag, and wherein:

when the activity flag is set for the selected alarm condition record, the first control means applies one or more of the selected alarm condition record'"'"'s at least one alarm condition to that alarm condition record'"'"'s associated data item to determine if the at least one medical data value selected by the first selection means violates one or more of the ay least one alarm condition, and

when the activity flag is not set for the selected alarm condition record, the first control means does not apply the selected alarm condition record'"'"'s at least one alarm condition to that alarm condition record'"'"'s associated data item.

19. The system of claim 3, further comprising display means which, under control of the second control means, displays each of the at least one marked data items in an attention-attracting format.

20. The system of claim 19, wherein the attention-attracting format is one of:

(a) bold display, (b) a reverse video display, (c) a flashing display, (d) a display of a particular color, and (e) a display marked with at least one graphical character.

21. The system of claim 3, further comprising:

eighth selection means for selecting at least one marked data item; and

fifth control means for unmarking each of the selected at least one marked data items.

22. A diagnostic method for use with a medical device implanted in a patient, the method comprising the steps of:

telemetrically receiving medical data transmitted by the medical device;

defining at least one alarm condition;

storing the at least one alarm condition;

applying the at least one alarm condition to the medical data to determine if any medical data values violate one of more of the at least one alarm condition; and

marking portions of the medical data having values which violate one or more of the at least one alarm condition.

23. The method of claim 22, wherein the medical data comprise at least one data item, each of the at least one data items comprising at least one medical data value.

24. The method of claim 23, wherein the portions of the marked medical data comprise at least one data item having one or more of the at least one medical data values which violate the at least one alarm condition.

25. The method of claim 24, further comprising the step of selecting the at least one medical data value from each of the at least one data items, wherein each of the at least one medical data values is at least one of:

(a) recently acquired medical data values received during a current transmission of medical data from the implantable medical device, and

(b) previously acquired medical data values received during a previous transmission of medical data from the implantable medical device.

26. The method of claim 25, further comprising the steps of:

defining at least one alarm condition record;

selecting a data item from the at least one data items;

selecting an alarm condition record from at the least one alarm condition records;

associating the selected alarm condition record with the selected data item; and

associating one or more of the at least one alarm condition with the selected at least one alarm condition record;

applying one or more of the selected alarm condition record'"'"'s at least one alarm condition to the selected at least one medical data value to determine if the selected at least one medical data value violates one or more of the at least one alarm condition.

27. The method of claim 26, wherein each of the at least one alarm condition associated with the at least one alarm condition record is at least one of:

(a) a lower alarm threshold, (b) an upper alarm threshold, and a (c) change alarm threshold.

28. The method of claim 27, wherein if the at least one alarm condition comprises the lower alarm threshold, the method further comprises the steps of:

selecting the lower alarm threshold from a lower alarm threshold set comprising at least one lower alarm threshold;

applying the selected lower alarm threshold to the selected at least one medical data value; and

determining if the selected at least one medical data value violates the at least one alarm condition by determining if the selected at least one medical data value comprises at least one medical data value which is lower than the selected lower alarm threshold.

29. The method of claim 28, wherein the lower alarm threshold set further comprises a null value, such that if the null value is selected for the lower alarm threshold, the lower alarm threshold is not applied to the selected at least one medical data value.

30. The method of claim 27, wherein if the at least one alarm condition comprises the upper alarm threshold, the method further comprises the steps of:

selecting the upper alarm threshold from an upper alarm threshold set comprising at least one upper alarm threshold;

applying the selected upper alarm threshold to the selected at least one medical data value; and

determining if the selected at least one medical data value violates the at least one alarm condition by determining if the selected at least one medical data value comprises at least one medical data value which is higher than the selected upper alarm threshold.

31. The method of claim 30, wherein the upper alarm threshold set further comprises a null value, such that if the null value is selected for the upper alarm threshold, the upper alarm threshold is not applied to the selected at least one medical data value.

32. The method of claim 27, further the steps of:

determining a baseline; and

associating the baseline with the selected alarm condition record if the selected alarm condition record comprises the change alarm threshold.

33. The method of claim 32, wherein the step of determining a baseline comprises setting the baseline to a constant value.

34. The method of claim 33, further comprising the step of determining at least one data item change value, wherein the at least one data item change value is representative of the difference between each of the selected at least one medical data values, and the selected data item alarm condition record'"'"'s associated baseline.

35. The method of claim 34, further comprising the steps of:

selecting the change alarm threshold from a change alarm threshold set comprising at least one change alarm threshold;

applying the selected change alarm threshold to the associated data item'"'"'s at least one data item change value; and

determining if the at least one data item change value violates the at least one alarm condition by determining if the at least one data item change value is higher than the selected change alarm threshold.

36. The method of claim 35, wherein the change alarm threshold set further comprises a null value, such that if the null value is selected for the change alarm threshold, the change alarm threshold is not applied to the selected at least one medical data value.

37. The method of claim 36, wherein the change alarm threshold set further comprises the step of deriving the change alarm threshold.

38. The method of claim 32, wherein the step of determining a baseline comprises the step of deriving the baseline for the selected alarm condition record from an at least one previously acquired medical value.

39. The method of claim 25, wherein each of the at least one alarm condition records further comprises an activity flag, wherein the method further comprises the step of controlling the activity flag, and wherein:

when the activity flag is set for the selected alarm condition record, one or more of the selected alarm condition record'"'"'s at least one alarm condition are applied to that alarm condition record'"'"'s associated data item to determine if the selected at least one medical data value violates one or more of the at least one alarm condition,

when the activity flag is not set for the selected alarm condition record, the selected alarm condition record'"'"'s at least one alarm condition is not applied to that alarm condition record'"'"'s associated data item.

40. The method of claim 22, further comprising the step of displaying each of the at least one marked data items in an attention-attracting format.

41. The method of claim 40, wherein the attention-attracting format is one of:

(a) bold display, (b) a reverse video display, (c) a flashing display, (d) a display of a particular color, and (e) a display marked with at least one graphical character.

42. The method of claim 22, further comprising the steps of:

selecting at least one marked data item; and

unmarking each of the selected at least one marked data items.