Implanted spiral electrode and manufacturing method thereof

Abstract

The invention discloses an implanted spiral electrode and a manufacturing method of the implanted spiral electrode, and belongs to the range of medical instruments. The implanted spiral electrode is of a flexible structure formed by first spiral bodies and a second spiral body, and a nerve tract is sleeved with the flexible structure. One ends of metal spiral wires in two insulation sleeve pipes are connected with stimulation contacts on the two first spiral bodies respectively, a traction line penetrates through one first spiral body and penetrates out of the other first spiral body, and a stimulation screw is formed by the traction line, the metal spiral wires and the simulation contacts. The stimulation contacts of a hollow flat annular structure is adopted, a silane coupling agent layer on the surface of the traction line and a lubricating coating on the surface of a connecting guide pipe are added, the connecting strength of all the parts of the simulation screw and a locating screw is enhanced, the glutinousness of the connecting guide pipe and human tissue is reduced, and the mechanical injury and physiological injury of the whole electrode to nerves can be reduced.

Description

technical field [0001] The invention belongs to the scope of medical devices, in particular to an implantable spiral electrode and a manufacturing method thereof, in particular to an electrode for implantable intradermal lesions used in peripheral nerve electrical stimulation therapy. Background technique [0002] The application of peripheral nerve electrical stimulation technology provides a means of auxiliary treatment for patients with epilepsy, depression, pain and other diseases. Cuff electrodes and spiral electrodes are two commonly used electrodes in peripheral nerve electrical stimulation therapy. Since cuff electrodes may cause side effects of nerve compression during long-term implantation, electrodes with a spiral structure have gradually become the first choice for peripheral nerve stimulation clinically. [0003] The limitation of the existing spiral electrodes used for electrical stimulation of peripheral nerves is that the friction between the silicone rubber...

AI Technical Summary

Problems solved by technology

[0003] The limitation of the existing spiral electrodes used for electrical stimulation of peripheral nerves is that the friction between the silicone rubber tube and human tissue is relatively large, and when the position of the electrode is affected by impact or other external forces, it is easy to cause partial tearing or even damage. A phenomenon in which the whole body breaks down, with the result that electrical stimulation cannot reach the target area

It has been reported in the literature that there have been clinical cases where the electrodes were broken due to the above reasons, and the patient had to undergo surgery again to replace the electrodes.

In addition, the adhesion between the polyester thread and the stimulating contact point and the polymer material in the helical structure of the electrode stimulation end is poor. When the electrode is implanted or taken out, the polyester thread is prone to fall off and the stimulating contact point is displaced. (In severe cases, it will be completely separated from the polymer material), and the stimulation contacts are mostly thin metal sheets, whose displacement can easily cause mechanical damage to the nerve, and at the same time, the displacement can easily generate leakage current, thereby stimulating non-target areas near the vagus nerve, resulting in relatively Serious side effects such as cough, sore throat, etc.

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