Multi-segment ECG electrode and system

• US 5,724,984 A
• Filed: 07/17/1996
• Issued: 03/10/1998
• Est. Priority Date: 01/26/1995
• Status: Expired due to Term

• Current Assignee: Spacelabs Healthcare, Inc. (OSI Systems Incorporated)
• Original Assignee: Cambridge Heart Inc.
• Inventors: Levin, Harvey, Cohen, Richard J., Albrecht, Paul, Arnold, Jeffrey M.
• Primary Examiner(s): Jastrzab, Jeffrey R.
• Application Number:
  US08/682,076
• Time in Patent Office: 601 Days
• Field of Search: 128/696, 128/698, 128/639-641, 128/644, 607/148, 607/149, 607/152
• US Class Current: 600/372
• CPC Class Codes: A61B 2562/0215 Silver or silver chloride containing
• CPC Class Codes: A61B 5/25 Bioelectric electrodes therefor
• CPC Class Codes: A61B 5/257 using adhesive means, e.g. adhesive pads or tapes
• CPC Class Codes: A61B 5/265 containing silver or silver chloride
• CPC Class Codes: A61B 5/266 containing electrolytes, conductive gels or pastes
• CPC Class Codes: A61B 5/28 for electrocardiography [ECG]
• CPC Class Codes: H01R 2201/12 for medicine and surgery

Abstract

A multi-segment ECG electrode includes a flexible basepad, a central segment defined on a surface of the basepad, and exterior segments defined on the surface of the basepad. The exterior segments may be sized, shaped and positioned relative to the central segment so that an average position of the exterior segments approximates a position of the central segment.

Claims

1. A multi-segment ECG electrode, comprising:

a flexible basepad,

a central conductive segment defined on the basepad,

exterior conductive segments defined on the basepad and positioned around the central segment, and

conductive traces extending from the central conductive segment and from each of the exterior conductive segments to a common region of the basepad,

wherein;

an average position of the exterior segments corresponds to a position of the central segment,

the basepad further comprises a connection tail,

the common region of the basepad is located at the connection tail, and

a hole extends through the connection tail.

2. The multi-segment ECG electrode of claim 1, wherein the hole extends through one of the conductive traces.

3. The multi-segment ECG electrode of claim 1, further comprising a layer of flexible, insulating foam positioned on the surface of the flexible basepad and on the conductive traces.

4. The multi-segment ECG electrode of claim 3, wherein the foam includes cutouts that form wells corresponding to the positions of the central segment and the exterior segments.

5. The multi-segment ECG electrode of claim 4, wherein the wells are filled with conductive gel.

6. The multi-segment ECG electrode of claim 3, wherein the foam includes an adhesive layer for attachment to a patient'"'"'s skin.

7. The multi-segment ECG electrode of claim 1, wherein the central segment and the exterior segments are formed by printing with a conductive material on the surface of the flexible base pad.

8. The multi-segment ECG electrode of claim 7, wherein the conductive material is silver-chloride ink.

9. The multi-segment ECG electrode of claim 1, wherein the exterior segments define a broken ring around the central segment.

10. The multi-segment ECG electrode of claim 9, wherein the central segment has a circular shape.

11. The multi-segment ECG electrode of claim 9, wherein the exterior segments have arcuate shapes.

12. The multi-segment ECG electrode of claim 9, wherein the electrode includes only three exterior segments that together define the broken ring.

13. The multi-segment ECG electrode of claim 12, wherein the exterior segments have arcuate shapes.

14. The multi-segment ECG electrode of claim 1, wherein the flexible basepad includes cutouts that provide increased flexibility.

15. The multi-segment ECG electrode of claim 14, wherein an outer periphery of the flexible basepad includes the cutouts that provide increased flexibility.

16. An electrocardiogram system including the multi-segment ECG electrode of claim 1, wherein the multi-segment ECG electrode is configured for attachment to a patient'"'"'s skin to detect electrical signals produced by the patient and the system further comprises:

a processor configured to generate an ECG waveform based on electrical signals detected by the multi-segment ECG electrode;

a lead connected between the multi-segment ECG electrode and the processor to deliver the electrical signals detected by the multi-segment ECG electrode to the processor; and

a display connected to the processor and configured to display the ECG waveform.

17. The electrocardiogram system of claim 16, wherein the processor is configured to process the electrical signals to detect alternans.

18. The electrocardiogram system of claim 16, wherein the processor is configured to process the electrical signals to detect a fetal ECG signal.

19. The electrocardiogram system of claim 16, wherein the processor is configured to process the electrical signals to detect ECG P waves.

20. A multi-segment ECG electrode, comprising:

a flexible basepad,

a central conductive segment defined on the basepad,

exterior conductive segments defined on the basepad and positioned around the central segment, and

conductive traces extending from the central conductive segment and from each of the exterior conductive segments to a common region of the basepad,

wherein;

the basepad further comprises a connection tail,

the common region of the basepad is located at the connection tail,

holes extend through the connection tail, and

each conductive trace is positioned on a region of the connection tail through which a hole extends.

21. A multi-segment ECG electrode, comprising:

a flexible basepad,

a central conductive segment defined on the basepad, and

exterior conductive segments defined on the basepad and positioned around the central segment,

wherein the multi-segment ECG electrode is configured for use with a connector that includes a connector housing, a conductive contact positioned in the connector housing and having a tapered end, and a seating surface positioned in the connector housing opposite the tapered end of the conductive contact, the multi-segment ECG electrode further comprising;

a connection hole formed in the basepad, the connection hole being sized to be larger than a first portion of the tapered end of the conductive contact and smaller than a second portion of the tapered end of the conductive contact, and

a conductive path formed on the basepad from one of the exterior segments to a region surrounding the connection hole.

22. The multi-segment ECG electrode of claim 21, wherein the basepad is configured to be deformed by pressure applied by the seating surface and the mechanism in a region surrounding the connection hole.

23. The multi-segment ECG electrode of claim 21, wherein the multi-segment ECG electrode further comprises:

multiple connection holes formed in the basepad; and

conductive paths formed on the basepad from each of the segments to regions surrounding corresponding connection holes.

24. A multi-segment ECG electrode, comprising:

a flexible basepad,

a central conductive segment defined on the basepad,

exterior conductive segments defined on the basepad and positioned around the central segment, and

a conductive trace extending from the central segment and each of the exterior segments,

wherein;

the basepad further comprises a connection tail,

the conductive traces extend to the connection tail, and

a hole extends through the connection tail.

25. The multi-segment ECG electrode of claim 24, wherein the hole extends through one of the conductive traces.

26. The multi-segment ECG electrode of claim 24, wherein each conductive trace is positioned on a region of the connection tail through which a hole extends.

27. The multi-segment ECG electrode of claim 24, wherein the exterior segments define a broken ring around the central segment.

28. The multi-segment ECG electrode of claim 27, wherein the electrode includes only three exterior segments that together define the broken ring.

29. The multi-segment ECG electrode of claim 24, wherein the flexible basepad includes cutouts that provide increased flexibility.

30. The multi-segment ECG electrode of claim 29, wherein an outer periphery of the flexible basepad includes the cutouts that provide increased flexibility.