Electrical stimulator

• US 4,296,760 A
• Filed: 11/26/1979
• Issued: 10/27/1981
• Est. Priority Date: 11/27/1978
• Status: Expired due to Term

• Current Assignee: Landskrona Finans AB
• Original Assignee: Gambro AB (Baxter International Inc.)
• Inventors: Carlsson, Per-Olov A. V., Hakansson, Bo H.
• Primary Examiner(s): Kamm, William E.
• Application Number:
  US06/097,380
• Time in Patent Office: 701 Days
• Field of Search: 128/130, 128/131, 128/251, 128/788, 128/783, 128/246
• US Class Current: 607/138
• CPC Class Codes: A61N 1/0512 Anal electrodes
• CPC Class Codes: A61N 1/0524 Vaginal electrodes

Abstract

Electrical stimulators are disclosed particularly for vaginal placement, comprising an element which is elongated along an axis corresponding with a direction in which the stimulator is intended to be placed, and, including a transverse cross-section having elongated axis in one direction perpendicular to its other axis, and a plurality of electrodes located on one side of a longitudinal cross section of the elongated element corresponding with that elongated axis, thus stabilizing its rotation upon its vaginal placement with the electrodes facing in a predetermined direction. The electrodes are adapted to control the urethral, urocystic and/or rectal functions through electrical pulses provided from a pulse generator, and the elongated element is preferably formed of rubber, plastics or the like, and is inflatable.

Claims

1. An electrical stimulator comprising an elongated element adapted for vaginal placement, said elongated element including a longitudinal axis, said longitudinal axis including a first end corresponding with a first end of said electrical stimulator and a second end corresponding with a second end of said electrical stimulator, said elongated element including a transverse cross-section throughout the length of said elongated element from said first end of said longitudinal axis to said second end of said longitudinal axis, said transverse cross-section having first and second perpendicular axes, said first perpendicular axis being greater than said second perpendicular axis, and a plurality of electrodes carried by said elongated element, said electrodes being located on the surface of said elongated element on one side of a longitudinal cross-section of said elongated element corresponding with said first perpendicular axis, so that when said stimulator is vaginally placed in a direction corresponding with said longitudinal axis said elongated element is stabilized against rotation with all of said electrodes facing in a predetermined direction.

2. The electrical stimulator of claim 1, wherein said transverse cross-section is substantially oval, and the area of said substantially oval transverse cross-section taken at said first end of said electrical stimulator is greater than the area of said substantially oval transverse cross-section taken at said second end of said electrical stimulator, and including continuously decreasing substantially oval cross-sections therebetween.

3. The electrical stimulator of claim 1, wherein the surface of said elongated element corresponding with said first axis and the surface of said elongated element corresponding with said second axis have arcuate configurations, and wherein the degree of curvature of said surface of said elongated element corresponding with said first axes is less than the degree of curvature of said surface of said elongated element corresponding with said second axis.

4. The electrical stimulator of claim 1, wherein said elongated element includes flexible walls, and including means for inflating said flexible walls of said elongated element.

5. The electrical stimulator of claim 4 in which said elongated element is prepared from rubber.

6. The electrical stimulator of claim 4 including an opening at one end of said elongated element corresponding with its axis, and including a cover member for closing said opening, said opening and said cover member being rotationally symmetrical.

7. The electrical stimulator of claim 6, wherein said cover member includes an aperture permitting the introduction of leads into the interior of said elongated element for connection with said electrodes and for connection with means for inflating and deflating said elongated element.

8. The electrical stimulator of claims 1 or 7, wherein said electrodes have a rivet-like configuration including a head member for location on the surface of said elongated element, a shank member projecting from said head member for passing through a wall of said elongated element, and a plate member projecting from said shank member so that said wall of said elongated element can be clamped between said head member and said plate member for firmly affixing said electrode thereto.

9. The electrical stimulator of claim 8, wherein said head member has an arcuate configuration extending towards said wall of said elongated element to assist in retaining said electrode in place.

10. The electrical stimulator of claim 8, wherein said shank member includes a hollow end portion at the end of said shank member displaced from said head member.

11. The electrical stimulator of claim 6, wherein said cover member includes a first flange for insertion into said opening and a second flange extending radially outwardly from said first flange so as to engage the surface of said elongated element surrounding said opening upon the closing of said opening with said cover member.

12. The electrical stimulator of claim 11, wherein said second flange has a conical shape.

13. The electrical stimulator of claim 4 in which said elongated element is prepared from plastic.