Electrode and method of making neuromuscular stimulator

• US 5,464,448 A
• Filed: 05/02/1994
• Issued: 11/07/1995
• Est. Priority Date: 05/02/1994
• Status: Expired due to Term

• Current Assignee: Encore Medical Asset Corporation (Enovis Corp.)
• Original Assignee: EMPI Incorporated (Enovis Corp.)
• Inventors: Malewicz, Andrzej
• Primary Examiner(s): Cohen, Lee S.
• Assistant Examiner(s): GREEN, BRIAN
• Application Number:
  US08/236,341
• Time in Patent Office: 554 Days
• Field of Search: 607/138, 607/148, 607/40, 607/41, 128/639, 128/642, 128/733, 128/738, 601/15, 29/883, 29/884, 29/874, 29/825, 156/202
• US Class Current: 607/138
• CPC Class Codes: A61N 1/0512 Anal electrodes
• CPC Class Codes: A61N 1/0524 Vaginal electrodes

Abstract

A method for manufacturing an electrode comprises molding a plurality of spaced conductive sections which include a pin receptacle for receiving a connector pin of a wire harness. A skeleton of conductive sections, connector pins and lead wires are placed in a mold which defines the electrode. A non-conductive polymer is molded to the skeleton to form an integral electrode having a elongated body of conductive sections separated by non-conductive sections. Multiple durometer polymers may be used to achieve desired levels of flexibility of the electrode.

Claims

1. A method for manufacturing a solid neuromuscular stimulator electrode comprising:

forming a skeleton which includes a plurality of spaced conductive polymer sections, and a plurality of lead wires with a connector pin at an end of each lead wire, in which at least one connector pin is positioned within each of the conductive polymer sections;

placing the skeleton within an electrode mold; and

molding non-conductive polymer to the skeleton to form an integral electrode having an elongated body with the conductive polymer sections separated by non-conductive polymer sections, wherein molding non-conductive polymer to the skeleton comprises forming a handle at a first end of the body and a bulbous end at a second end of the body, the handle and bulbous end of the skeleton being formed from a first non-conductive polymer having a first durometer and the non-conductive polymer sections being formed from a second non-conductive polymer having a second durometer.

2. The method of claim 1 wherein forming a skeleton comprises:

molding the plurality of spaced conductive polymer sections, each conductive polymer section including a pin receptacle; and

inserting a connector pin and lead wire into the pin receptacle in each conductive polymer section.

3. The method of claim 2 and further comprising forming a wire receptacle in communication with the pin receptacle in at least one conductive polymer section.

4. The method of claim 1 wherein forming a skeleton comprises:

positioning a wire harness in a mold which defines the plurality of spaced conductive polymer sections; and

introducing a conductive polymer into the mold such that the plurality of conductive polymer sections are molded to the wire harness.

5. The method of claim 1 wherein forming the skeleton comprises molding the plurality of spaced conductive polymer sections from a thermostat conductive polymer.

6. The method of claim 1 wherein forming the skeleton comprises molding the plurality of spaced conductive polymer sections from a thermoplastic conductive polymer.

7. A neuromuscular stimulator electrode comprising:

an elongated contoured body including a plurality of spaced conductive sections molded from a conductive polymer;

a plurality of non-conductive sections interposed between the conductive sections, wherein the non-conductive sections are molded from a first non-conductive polymer;

a handle extending from a first end of the elongated contoured body and a bulbous end extending from a second end of the elongated contoured body, wherein the handle and bulbous end are molded from a second non-conductive polymer different from the first non-conductive polymer; and

a wire harness extending from the handle.

8. The neuromuscular stimulator electrode of claim 7 wherein the first non-conductive polymer has a lower durometer than the second non-conductive polymer.

9. The neuromuscular stimulator electrode of claim 7 wherein the first non-conductive polymer has a durometer ranging from 75-85 shore A.

10. The neuromuscular stimulator electrode of claim 7 wherein the second non-conductive polymer has a durometer ranging from 65-70 shore A.

11. A method of making an electrode comprising:

positioning a wire harness in a first mold which defines a plurality of spaced conductive polymer sections, the wire harness comprising a plurality of wire leads;

introducing a conductive polymer into the first mold to form a skeleton comprising the plurality of spaced conductive polymer sections and the plurality of wire leads, wherein at least one of the plurality of wire leads is positioned within each of the conductive polymer sections;

positioning the skeleton in a second mold; and

introducing a non-conductive polymer into the second mold to form an integral electrode body having alternating conductive polymer sections and non-conductive polymer sections.

12. The method of claim 11 wherein the step of introducing the non-conductive polymer into the second mold includes forming a handle at a first end of the electrode body and a blunt tip at a second end of the electrode body.

13. The method of claim 12 wherein the step of introducing the non-conductive polymer into the second mold includes forming the handle and the blunt tip from a first non-conductive polymer and the non-conductive polymer sections from a second non-conductive polymer different from the first non-conductive polymer.

14. The method of claim 13 wherein the step of introducing the non-conductive polymer into the second mold comprises introducing the first non-conductive polymer having a lower durometer than the second non-conductive polymer.

15. The method of claim 11 wherein the step of introducing the conductive polymer comprises introducing a thermoset conductive polymer.

16. The method of claim 11 wherein the step of introducing the conductive polymer comprises introducing a thermoplastic conductive polymer.

17. The method of claim 11 wherein the step of introducing the non-conductive polymer comprises forming a contoured integral electrode body.