CN103272327B - A kind of Bioelectrode fixer - Google Patents

Abstract

The invention discloses a kind of holder for fixed biologically electrode, especially for the bioelectrode of implant into body cerebral deep, good fixation can be played; It mainly comprises pedestal, over cap, fixing head and packing ring.Stair-stepping pedestal can make holder be fixed in patient's skull hole accurately; On pedestal, irregular track can ensure that bioelectrode all has favorably situated fixing aperture fixed by bioelectrode and be clamped on its tram when being in any position in skull hole plane; Fixing head can be pressed on pedestal by packing ring; By bioelectrode after the electrode leads to client groove pull-out of pedestal, press over cap, by coordinating of over cap and pedestal, achieve the sealing to institute's hole-opening and holder in patient's skull, complete fixing bioelectrode.

Description

A biological electrode holder

technical field

The invention relates to a biological electrode holder.

Background technique

In clinical medicine, for the treatment of more serious neurological disorders, such as Parkinson's disease, severe epilepsy, hearing nerve disorders, optic nerve disorders, or drug rehabilitation, the most effective treatment method is to perform surgery on the deep part of the patient's brain. Bioelectrodes are implanted at the target site for a long time, and the neural nuclei at the target site are stimulated by electric discharge to treat or improve the patient's condition. The implanted bioelectrodes used in current clinical treatment are generally millimeter-scale cylindrical electrodes, and the therapeutic effect mainly depends on the accuracy of the implanted target position of the bioelectrodes. In addition, after the bioelectrode is correctly implanted into the brain target position during surgery, the accuracy of the location of the bioelectrode and the accuracy of positioning during use are also important reasons that affect the therapeutic effect of the bioelectrode. Therefore, in clinical surgery, after the bio-electrode is implanted in the correct position, the bio-electrode must be fixed on the patient's skull with a special fixer, otherwise the bio-electrode may be displaced in the patient's body during the subsequent treatment, causing the bio-electrode to The electrode deviates from the target position, which leads to a decrease in the stimulation effect of the bioelectrode and even a failure of the operation.

Therefore, when implanting bioelectrodes, using a bioelectrode fixer with reasonable structure, precise positioning, and convenient and effective operation to fix the bioelectrodes is the key to ensuring the therapeutic effect of bioelectrodes and improving the success rate of surgical implantation of electrodes.

Contents of the invention

The purpose of the present invention is to provide a biological electrode holder with accurate positioning and convenient operation.

In order to achieve the above object, the technical scheme adopted in the present invention is:

A bioelectrode fixer includes a base on which a through hole for bioelectrode implantation is opened, a fixing plate is connected above the base, and an electrode fixing small hole is arranged on the fixing plate.

The fixed plate is composed of a left fixed plate and a right fixed plate, and the joint of the left fixed plate and the right fixed plate is provided with a fixed small hole.

The base is stepped, the bottom is provided with a circular step for fixing on the patient's skull, the center of the base is provided with a through hole for bioelectrode implantation, and a track is provided on the base; A slider that can freely rotate along the track in the base is provided.

The right fixed plate is respectively provided with a boss for connecting the left fixed plate and a clamping groove for clamping the clamping block of the left fixed plate; The small through slot on the top and the clamping block for inserting into the clamping slot of the right fixed plate.

The upper edge of the base is provided with base electrode lead-out slots; the left and right fixing plates are provided with gaskets above which are provided with a protective cover connected to the base through protective card slots.

The right fixed plate is provided with a fixed small hole right profile structure, and the left fixed plate is provided with a fixed small hole left profile structure. After the right fixed plate and the left fixed plate are assembled, the fixed small hole right profile and fixed The left contour of the aperture forms a fixed aperture.

The protective cover is provided with a clamping block for inserting the protective cover into the protective card slot of the base, and the protective cover is provided with electrode lead-out grooves.

The washer is made of elastic material.

Compared with the prior art, the present invention has the following advantages:

(1) The fixation of the bioelectrode fixer provided by the present invention on the patient's skull is completed by the cooperation of the stepped structure of the fixator base and the hole drilled on the patient's skull, which can ensure the accuracy and stability of the fixer's positioning;

(2) The bio-electrode holder provided by the present invention fixes the bio-electrode by a slidable fixing plate assembled in the base track. The fixed plate rotates in the irregular orbit of the base, so that a fixed hole in the middle of the fixed plate can be located at any position in the plane of the hole drilled on the patient’s skull. Cooperate with clamping bio-electrode, when clamping, it can not only ensure that the bio-electrode is not deformed, but also ensure the precise positioning of the bio-electrode without moving the bio-electrode, and the positioning accuracy is high;

(3) The fixing plate assembled on the base provided by the present invention has good interchangeability. According to the diameter of the bioelectrode, a fixing plate with a fixed hole of a suitable size is selected, which is suitable for fixing bioelectrodes of different sizes;

(4) The biological fixator provided by the present invention is easy to operate and has good stability.

Description of drawings

Fig. 1(a) is the overall structure diagram of the biological electrode holder provided by the present invention, and Fig. 1(b) is a side view of Fig. 1(a);

Figure 2(a) is a structural view of the holder after removing the protective cover, and Figure 2(b) is a side view of Figure 2(a);

Figure 3(a) is a schematic structural diagram of the base, and Figure 3(b) is a side view of Figure 3(a);

Figure 4(a) is a schematic structural view of the right fixing plate, and Figure 4(b) is a side view of Figure 4(a);

Figure 5(a) is a schematic structural view of the left fixing plate, and Figure 5(b) is a side view of Figure 5(a);

Figure 6(a) is a schematic structural view of the gasket, and Figure 6(b) is a side view of Figure 6(a);

FIG. 7( a ) is a schematic structural view of the protective cover, and FIG. 7( b ) is a side view of FIG. 7( a ).

Detailed ways

As shown in FIGS. 1 to 7 , the biological electrode holder provided by the present invention is mainly composed of four parts: a base 1 , a right fixing plate 3 and a left fixing plate 4 , a gasket 5 and a protective cover 2 . The fixed plate is composed of a right fixed plate 3 and a left fixed plate 4, which can cooperate with each other after being assembled on the base 1 to form a clamping mechanism. The right fixed plate 3 is assembled on the base 1, and the slider 10 of the right fixed plate 3 rotates in the irregular track 7 of the base, so that the position of a certain fixed hole on the right fixed plate is just in line with the implanted biological The positions of the electrodes coincide, and then, the left fixing plate 4 shown in Fig. 5(a) is installed on the boss 11 of the right fixing plate 3, and the left fixing plate and the right fixing plate cooperate with each other to realize the clamping of the electrodes. Cover the washer 5, fix the right fixing plate 3 and the left fixing plate 4, so that they will not rotate any more, so as to realize the positioning of the electrodes at their correct positions. Pull the bioelectrode out from the position of a base electrode lead-out groove 9 in the base 1, and press the clamping block 18 on the protective cover 2 into the protective card slot 8 of the base to realize the positioning of the bioelectrode and the fixation of the fixer. seal.

The material of the biological electrode holder provided by the present invention is a medical polymer material with good biocompatibility, which is a non-degradable material, such as polyurethane, polyethylene, polypropylene, polyacrylate, aromatic polyester, polysiloxane and the like.

The specific structure of the biological electrode holder provided by the invention is as follows:

The base 1 shown in Figure 3(a) is a stepped structure, the size of the bottom circular step is the same as the diameter of the hole on the patient's skull, and is used for positioning the bioelectrode fixer on the patient's skull; There is a through hole 6 in the center of the seat 1, which is the implantation position of the bio-electrode. Through this through-hole 6, the bio-electrode can pass through the middle of the invented bio-electrode holder during surgery. Four base electrode lead-out grooves 9 are evenly distributed on the outer edge of the base, so that the biological electrode can be pulled out along one of the grooves after being fixed, without affecting the sealing fixer of the protective cover.

The right fixing plate 3 and the left fixing plate 4 shown in FIG. 4 and FIG. 5 are assembled on the base 1 together to form a positioning and fixing device for the bioelectrode. During assembly, the circular slider 10 in the right fixed plate 3 is embedded in the concave irregular track 7 in the base 1, and can rotate freely in the irregular track 7 of the base 1, and rotate to a certain position on the right fixed plate 3. Stop when the position of the fixed small hole coincides with the position of the implanted bioelectrode. Then, the small through groove 14 of the left fixed plate 4 is installed on the boss 11 of the right fixed plate 3, the cooperation of the small through groove 14 and the boss 11 can make the left fixed plate 4 do linear motion or rotary motion on the base . Rotate the left fixed plate 4 so that the clamping block 16 of the left fixed plate 4 is clamped in the clamping groove 13 of the right fixed plate 3, realizing the firm connection of the right fixed plate and the left fixed plate. At this time, the left profile 15 of the fixed small hole on the left fixed plate 4 and the right profile 12 of the fixed small hole in the middle of the right fixed plate 3 are combined to form a closed circular hole with a size slightly smaller than the diameter of the bioelectrode. Realize the clamping of the bioelectrode.

The right fixing plate 3 and the left fixing plate 4 shown in FIG. 4 and FIG. 5 are interchangeable. The bioelectrodes implanted in different patients may have different sizes, and a fixing plate with an appropriate size of the fixed hole diameter can be selected according to the size of the implanted bioelectrodes.

The right fixing plate 3 and the left fixing plate 4 shown in Figure 4 and Figure 5 are provided with a plurality of fixing small holes, because the irregular shape of the track 7 of the base 1, no matter where the bioelectrode is located in the patient's skull after implantation Any position in the hole plane can ensure that the position of at least one fixed hole on the fixed plate coincides with the position of the bioelectrode, so that the position of the electrode does not move when the fixed plate clamps the bioelectrode, thereby realizing the bioelectrode fixation time accuracy and stability.

The fixing of the bioelectrode is achieved by rotating the right fixing plate 3 in the irregular track 7 of the base 1 to the best fixing position, and then matching the left fixing plate 4 with the right fixing plate 3. The position of the plate 4 is determined by the right fixed plate 3. Therefore, after the bio-electrode is fixed in the middle of the fixing plate, the fixing plate must also be fixed, so as to prevent the fixing plate from rotating again and affecting the position of the bio-electrode.

The present invention uses the washer 5 shown in Figure 6 to fix the fixing plate of the fixer, and its material can be a material with good biocompatibility and good elasticity, such as rubber. After the right fixing plate 3 and the left fixing plate 4 clamp and fix the bioelectrode, the gasket 5 is embedded between the base 1 and the right fixing plate 3 and the left fixing plate 4, and after the protective cover 2 is pressed in, the elasticity of the rubber gasket 5 Make it fill the gap between the base 1, the fixed plate (right fixed plate 3 and left fixed plate 4) and the protective cover 2, because the rubber material of the gasket 5 has a large expansion force and frictional resistance, the fixed plate will not Free movement will then occur, thereby achieving fixation of the fixed plate. After the fixing plate is fixed, the position of the bioelectrodes is accurately positioned and clamped. To close the hole drilled in the patient's skull, the bioelectrode holder is closed with a protective cover. The protective cover 2 is designed with four clamping blocks 18, which can be embedded in the four clamping grooves 8 on the base 1. After assembly, the protective cover 2 is also in contact with the rubber gasket 5, relying on the gap between the rubber gasket 5 and the protective cover 2. The large frictional force that exists stably embeds the protective cover between the base 1 and the rubber gasket 5, realizes the sealing of the bioelectrode holder, avoids the exposure of the holder and the patient's skull hole, and the protective cover 2 An electrode lead-out groove 17 is provided for cooperating with the base electrode lead-out groove 9 to lead out electrodes.

Claims (6)

1. A bioelectrode holder, characterized in that it comprises a base, the base has a through hole for bioelectrode implantation, the base is connected with a fixing plate, and the fixing plate is provided with an electrode fixing aperture; The fixed plate is composed of a left fixed plate and a right fixed plate, and a small fixing hole is provided at the junction of the left fixed plate and the right fixed plate; The base is stepped, the bottom is provided with a circular step for fixing on the patient's skull, the center of the base is provided with a through hole for bioelectrode implantation, and a track is provided on the base; A slider that can freely rotate along the track in the base is provided. 2. The bioelectrode holder according to claim 1, wherein the right fixing plate is respectively provided with a boss for connecting the left fixing plate and a clamping groove for clamping the clamping block of the left fixing plate ; The left fixed plate is respectively provided with a small through groove that can be installed on the boss of the right fixed plate and a clamping block for inserting into the clamping groove of the right fixed plate. 3. The biological electrode holder according to claim 2, wherein the upper edge of the base is provided with a base electrode lead-out groove; the left and right fixing plates are provided with gaskets above the gaskets, and the base is provided with a protective card. Protective cover for slot connections. 4. bioelectrode holder as claimed in claim 3, is characterized in that, described right fixed plate is provided with fixed small hole right profile structure, described left fixed plate is provided with fixed small hole left profile structure, described After the right fixed plate and the left fixed plate are assembled, the fixed small hole right contour and the fixed small hole left contour form the fixed small hole. 5. The bioelectrode holder according to claim 4, wherein the protective cover is provided with a clamping block for inserting the protective cover into the protective slot of the base, and the protective cover is provided with The electrode leads out of the groove. 6. The biological electrode holder according to claim 5, wherein the gasket is made of elastic material.