Combined skin preparation and monitoring electrode

• US 5,309,909 A
• Filed: 05/22/1992
• Issued: 05/10/1994
• Est. Priority Date: 05/22/1992
• Status: Expired due to Term

• Current Assignee: Physio-Control Incorporated (Stryker Corporation)
• Original Assignee: Physio-Control Incorporated (Stryker Corporation)
• Inventors: Paeth, David S., Gadsby, Peter D., Niskanen, Robert A.
• Primary Examiner(s): Cohen, Lee S.
• Application Number:
  US07/888,041
• Time in Patent Office: 718 Days
• Field of Search: 128/639-641, 128/643, 128/644, 128/758, 128/802, 128/803, 607/149, 607/152, 607/153
• US Class Current: 600/386
• 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 5/274 using snap or button fasteners
• CPC Class Codes: A61B 5/325 Preparing electrode sites, e.g. by abrasion

Abstract

Disclosed is a combined skin preparation and monitoring electrode (12). The electrode reduces motion artifacts in recording biopotentials by penetrating a patient'"'"'s skin prior to acquiring biopotentials. Penetration of the skin reduces skin impedance and the skin'"'"'s propensity to generate motion artifacts. The electrode has a resilient dome (16) with penetration tines (18) extending from the concave inner surface of the dome. Upon application of a force to the dome, the dome moves from a first position to a second position, forcing the penetration tines into a patient'"'"'s skin. Upon removal of the force, the dome moves back to its original configuration, withdrawing the penetration tines from the patient'"'"'s skin.

Claims

1. A skin preparation and monitoring electrode for application to a patient'"'"'s skin to receive biopotentials conducted by the skin, the electrode comprising:

(a) an electrode body including support means for moving from a first position to a second position upon application of a force to the support means and for returning to the first position upon removal of the force from the support means;

(b) conductive means, attached to the electrode body, for receiving biopotentials; and

(c) skin penetration means, attached to the support means, for penetrating the patient'"'"'s skin when the support means moves from the first position to the second position and withdrawing from the patient'"'"'s skin when the support means moves from the second position to the first position.

2. The electrode of claim 1, wherein the electrode body is conformable to the patient'"'"'s skin.

3. The electrode of claim 1, wherein the support means comprises a deformable resilient structure.

4. The electrode of claim 3, wherein the deformable resilient structure comprises a dome including a concave side and a convex side, and wherein the penetration means extend from the concave side when the support means is in the first position.

5. The electrode of claim 3, wherein the deformable resilient structure comprises a diaphragm having a top surface and a bottom surface, and wherein the penetration means extend from the bottom surface of the diaphragm structure.

6. The electrode of claim 3, wherein the deformable resilient structure comprises a compressible foam pad.

7. The electrode of claim 6, wherein the skin penetration means includes a plurality of tines and a circular base having a lower surface, the tines extending from the lower surface of the base.

8. The electrode of claim 1, wherein the skin penetration means comprises at least one tine.

9. The electrode of claim 1, further comprising attachment means for releasably attaching the electrode body to the patient'"'"'s skin.

10. The electrode of claim 9, wherein the attachment means comprises a layer of adhesive material coupled to the electrode body.

11. A method of preparing a patient'"'"'s skin to allow biopotentials conducted by the skin to be monitored, the method comprising the steps of:

(a) positioning a monitoring electrode onto the patient'"'"'s skin, the monitoring electrode including means for receiving biopotentials and penetration means for penetrating the patient'"'"'s skin;

(b) applying a force to the monitoring electrode in the direction of the patient'"'"'s skin, to cause the penetration means to penetrate the patient'"'"'s skin;

(c) removing the force from the monitoring electrode, to allow the penetration means to withdraw from the patient'"'"'s skin.

12. The method of claim 11, and further including the step of conforming the monitoring electrode to the contours of the patient'"'"'s skin.

13. The method of claim 11, wherein the monitoring electrode includes a resiliently deformable structure and the steps of applying and removing force comprise applying and removing force to the structure.

14. The method of claim 11, further comprising the step of releasably attaching the monitoring electrode to the patient'"'"'s skin with an adhesive.

15. A skin preparation and monitoring electrode for application to a patient'"'"'s skin to receive biopotentials conducted by the skin, the electrode comprising:

(a) an electrode body including support means for moving from a first position to a second position upon application of a force to the electrode body;

(b) conductive means, attached to the electrode body, for receiving biopotentials; and

(c) skin penetration means, attached to the support means, for penetrating the patient'"'"'s skin when the support means is in the first position and for withdrawing from the patient'"'"'s skin when the support means moves from the first position to the second position.

16. The electrode of claim 15, wherein the electrode body is conformable to the patient'"'"'s skin.

17. The electrode of claim 15, wherein the support means comprises a deformable resilient structure.

18. The electrode of claim 17, wherein the deformable resilient structure comprises a dome including a concave side and a convex side, and wherein the penetration means extend from the convex side when the support means is in the first position.

19. The electrode of claim 15, wherein the skin penetration means comprises at least one tine.

20. The electrode of claim 15, wherein the electrode body includes an outer surface that extends around the periphery of the support means and wherein the application of force is applied to the outer surface of the electrode body.