CN209108407U - A curved electrode for intracranial implantation - Google Patents

Abstract

The utility model provides an arc electrode for intracranial implantation. The arc electrode comprises a conducting wire and an arc electrode sheath; the conducting wire is placed in the electrode sheath; the wall of the electrode sheath is provided with The electrical stimulation output contact is connected with the conductive wire to output the electrical signal of the conductive wire; the utility model can introduce electrodes into the brain with an arc-shaped trajectory, and can realize the detection of two randomly selected intracranial Combined electrical stimulation of nerve nuclei, with the ability to apply different stimulation parameters to different nerve nuclei.

Description

A curved electrode for intracranial implantation

technical field

The utility model relates to the field of medical instruments, in particular to an arc electrode for intracranial implantation.

Background technique

Deep brain stimulation is an effective method for the treatment of movement disorders and a powerful tool for studying brain function. With the promotion of deep brain stimulation in clinical treatment and the gradual deepening of deep brain stimulation combined with electrophysiological recording in brain function research, electrodes are implanted into multiple different intracranial nerve nuclei at the same time, so that the implanted A single electrode can contact multiple target nerve nuclei at the same time, which has important application value. Multi-nucleus combined with deep brain stimulation has the effect that single-nucleus deep brain stimulation does not have.

However, since the current deep brain stimulation electrodes are all linear, it is not possible to arbitrarily implant a single electrode into multiple intracranial targets at the same time using the current deep brain stimulation electrodes. Since there is only one straight line passing through the two targets at the same time, the simultaneous implantation of two intracranial targets with a straight-line deep electrical stimulation electrode is only suitable for a small number of target combinations, such as the nucleus accumbens. + Internal capsule forelimb (patent: deep brain stimulation electrode and device, authorization announcement number: CN204092843 U). The straight-line deep electrical stimulation electrode cannot choose the target combination more arbitrarily. Once the distance between the two target points is far away or the extension line connecting the two target points is not suitable for the implantation channel of the deep brain stimulation electrode, the method may be difficult to apply. However, there are currently no arcuate deep brain stimulation electrodes designed to stimulate multiple neural nuclei simultaneously with a single electrode.

SUMMARY OF THE INVENTION

The utility model proposes an arc-shaped electrode for intracranial implantation, which can introduce the electrode into the brain with an arc-shaped trajectory, can realize the combined electrical stimulation of two randomly selected intracranial nerve nuclei, and can treat different intracranial nerve nuclei. Nuclei are applied with different stimulation parameters.

The utility model adopts the following technical solutions.

An arc-shaped electrode for intracranial implantation, the arc-shaped electrode comprises a conductive wire and an arc-shaped electrode sheath; the conductive wire is placed in the electrode sheath; the wall of the electrode sheath is provided with an electrical stimulation output contact point, the electrical stimulation output contact is connected with the conductive wire to output the electrical signal of the conductive wire.

The starting end of the arc electrode is provided with M electrical stimulation input contacts, and the extension portion of the arc electrode is provided with M electrical stimulation output contacts. wire connected.

The electrical stimulation input contacts and the electrical stimulation output contacts are both arranged along the arc-shaped direction of the arc-shaped electrode body.

The width of the electrical stimulation input contact and the electrical stimulation output contact is 0.5-2mm.

The electrical stimulation output contacts form more than one stimulation group in the direction of the electrodes; the distance between adjacent electrical stimulation output contacts in each stimulation group is the same.

Both the electrical stimulation input contact and the electrical stimulation output contact are annular contacts arranged around the side wall of the electrode sheath; the cross section of the arc electrode is circular or oval.

The number of the conductive wires is not less than one.

The conductive wire is a flexible wire formed of a metal material, and the electrode sheath is formed of a soft and tough material.

The arc and width of each part in the extending direction of the arc electrode are the same.

The utility model overcomes the prior art that a deep brain electrical stimulation electrode is only aimed at one intracranial target point, or can only electrically stimulate two target points of the pathway on a single straight channel, and can realize two arbitrary selected target points. Combined electrical stimulation of individual intracranial nerve nuclei, and different stimulation parameters can be applied to different nerve nuclei, improving the efficacy and safety of deep brain stimulation in the treatment of movement disorders, mental diseases, etc.

In the present invention, the electrode sheath is formed of soft and ductile material; this design enables the electrode to be easily implanted into the skull, and the electrode is not easy to generate a resilient force, thereby protecting the intracranial human tissue.

Description of drawings

Below in conjunction with the accompanying drawings and specific embodiments, the present utility model is described in further detail:

Accompanying drawing 1 is the schematic diagram of the present utility model;

Accompanying drawing 2 is the cutaway schematic diagram of electrode sheath;

In the figure: 1 - electrical stimulation input contact; 2 - electrode sheath; 3 - electrical stimulation output contact; 4 - stimulation group; 5 - conduction wire.

Detailed ways

As shown in Figure 1-2, an arc electrode for intracranial implantation, the arc electrode includes a conductive wire 5 and an arc electrode sheath 2; the conductive wire 5 is placed in the electrode sheath 2; The wall of the electrode sheath is provided with an electrical stimulation output contact 3, and the electrical stimulation output contact 3 is connected with the conducting wire 5 to output the electrical signal of the conducting wire.

The starting end of the arc electrode is provided with M electrical stimulation input contacts, and the extension portion of the arc electrode is provided with M electrical stimulation output contacts. wire connected.

The electrical stimulation input contacts and the electrical stimulation output contacts are both arranged along the arc-shaped direction of the arc-shaped electrode body.

The width of the electrical stimulation input contact and the electrical stimulation output contact is 0.5-2mm.

The electrical stimulation output contacts form more than one stimulation group 4 in the direction of the electrodes; the distance between adjacent electrical stimulation output contacts 3 in each stimulation group is the same.

Both the electrical stimulation input contact and the electrical stimulation output contact are annular contacts arranged around the side wall of the electrode sheath; the cross section of the arc electrode is circular or oval.

The number of the conductive wires is not less than one.

The conductive wire is a flexible wire formed of a metal material, and the electrode sheath is formed of a soft and tough material.

The arc and width of each part in the extending direction of the arc electrode are the same.

In this example, M is an integer not less than 1; the electrical stimulation input contact is connected to the external electrical pulse generator, and the external electrical pulse generator is connected to the respective corresponding conductive wires through different stimulation parameter output terminals, with one electrode at the same time. Different electrical impulses are delivered to different parts of the brain.

Claims (9)

1. an arc-shaped electrode for intracranial implantation, for deep brain stimulation, characterized in that: the arc-shaped electrode comprises a conductive wire and an arc-shaped electrode sheath; the conductive wire is placed in the electrode sheath Inside; the electrode sheath wall is provided with an electrical stimulation output contact, and the electrical stimulation output contact is connected with the conducting wire to output the electrical signal of the conducting wire. 2 . The arc electrode for intracranial implantation according to claim 1 , wherein M electrical stimulation input contacts are arranged at the beginning of the arc electrode, and the extension part of the arc electrode is provided with M electrical stimulation input contacts. 3 . There are M electrical stimulation output contacts, and the electrical stimulation input contacts and the electrical stimulation output contacts are connected by conductive wires. 3 . The arc electrode for intracranial implantation according to claim 2 , wherein the electrical stimulation input contacts and the electrical stimulation output contacts are arranged along the arc of the arc electrode body. 4 . cloth. 4 . The arc electrode for intracranial implantation according to claim 2 , wherein the width of the electrical stimulation input contact and the electrical stimulation output contact is 0.5-2 mm. 5 . 5 . The arc electrode for intracranial implantation according to claim 2 , wherein the electrical stimulation output contacts form more than one stimulation group in the direction of the electrodes; The spacing between adjacent electrical stimulation output contacts is the same. 6 . The arc electrode for intracranial implantation according to claim 1 , wherein the electrical stimulation input contact and the electrical stimulation output contact are annular electrodes arranged around the side wall of the electrode sheath. 7 . Contact; the cross section of the arc electrode is circular or oval. 7 . The arc electrode for intracranial implantation according to claim 1 , wherein the number of the conductive wires is not less than one. 8 . 8 . The arc electrode for intracranial implantation according to claim 1 , wherein the conductive wire is a flexible wire formed of a metal material, and the electrode sheath is formed of a soft and flexible material. 9 . 9 . The arc electrode for intracranial implantation according to claim 1 , wherein the arc and width of each part in the extending direction of the arc electrode are the same. 10 .