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Low Stress Termination Of Conductor To An Electrode

IP.com Disclosure Number: IPCOM000009887D
Publication Date: 2002-Sep-25
Document File: 5 page(s) / 17K

Publishing Venue

The IP.com Prior Art Database

Abstract

A ring and sleeve cooperate to provide a ring electrode with a low stress conductor termination. The ring comprises a smooth cylindrical section and a reduced diameter threaded section. The sleeve has a smooth outside surface the same diameter as the smooth section and a smooth inside surface the same diameter as the major diameter of the threaded section. A bare conductor is wound into the threads, and the sleeve is slipped over the threads to retain the conductor. The sleeve may be swaged, crimped, bonded, or welded in place. A ring electrode so constructed distributes the connection, and thereby the stress, over the length of the conductor segment wound in the threads.

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Low Stress Termination Of Conductor To An Electrode

A ring and sleeve cooperate to provide a ring electrode with a low stress conductor termination. The ring comprises a smooth cylindrical section and a reduced diameter threaded section. The sleeve has a smooth outside surface the same diameter as the smooth section and a smooth inside surface the same diameter as the major diameter of the threaded section. A bare conductor is wound into the threads, and the sleeve is slipped over the threads to retain the conductor. The sleeve may be swaged, crimped, bonded, or welded in place. A ring electrode so constructed distributes the connection, and thereby the stress, over the length of the conductor segment wound in the threads.

Low Stress Termination Of Conductor To An Electrode

Background

Spinal cord stimulation is a well accepted clinical method for reducing pain in certain populations of patients.� SCS systems typically include an Implantable Pulse Generator (IPG), electrodes, and electrode lead extension connecting the IPG� to the electrodes.� The IPG� generates electrical pulses that are delivered to the dorsal column fibers within the spinal cord through the electrodes. The electrodes are implanted along the dura of the spinal cord.� Individual electrode contacts (the “electrodes”) are arranged in a desired pattern and spacing in order to create an electrode array. Individual conductors, or electrode leads, connect with each electrode in the array. The electrode leads exit the spinal cord and attach to one or more electrode lead extensions.� The electrode lead extension, in turn, is typically tunneled around the torso of the patient to a subcutaneous pocket where the IPG is implanted.

Spinal cord and other stimulation systems are known in the art.� For example, an implantable electronic stimulator may provide timed sequenced electrical impulses to a plurality of electrodes.� As another example, an electrode implant may be used for neuro-stimulation of the spinal cord.� A relatively thin and flexible strip of biocompatible material is provided as a carrier on which a plurality of electrodes are formed.� The electrodes are connected by a conductor, e.g., a lead body, to an RF receiver, which is also implanted, and which is controlled by an external controller.

Another type of electrical spinal cord stimulation device has five aligned electrodes which are positioned longitudinally on the spinal cord.� Current pulses applied to the electrodes block sensed intractable pain, while allowing passage of other sensations.� The stimulation pulses applied to the electrodes have a repetition rate of from 5 to 200 pulses per second.� A patient operated switch allows the patient to change which electrodes are activated, i.e., which electrodes receive the current stimulus, so that the area between the activated electrodes on the spinal cord can be adjusted, as required, to better block the pain.        � � � � � � � �         � � � � � � � � � � �

Most of the electrod...