CN216933241U

CN216933241U - Multifunctional electrode for nerve electrophysiology monitoring in spinal and spinal cord operation

Info

Publication number: CN216933241U
Application number: CN202120461816.XU
Authority: CN
Inventors: 不公告发明人
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-03-03
Filing date: 2021-03-03
Publication date: 2022-07-12
Anticipated expiration: 2031-03-03

Abstract

The utility model discloses a multifunctional electrode for nerve electrophysiology monitoring in spinal cord operation, belonging to the technical field of medical instruments. An electrode for nerve electrophysiology monitoring in spinal cord operation comprises an electrically insulating substrate, an electric conducting piece extending in the substrate, an electrode contact and a connecting lead, wherein the electric conducting piece penetrates through the connecting lead and connects the electrode contact with the connecting lead, and the tail end of the connecting lead is fixedly connected with a universal joint which can be directly connected with a nerve electrophysiology monitor; the electric insulation substrate is a flexible polymer film with a plane structure or a three-dimensional structure and comprises a first electrode area and a second electrode area which are integrally connected, and the second electrode area is positioned at one end of the electric insulation substrate close to the connecting lead. The utility model can be used for detecting the nerve electrical signals in spinal cord operation, and the double-electrode application can be used as a spinal cord stimulating and recording electrode, thereby not shielding the operation visual field and reducing the incidence rate of postoperative nerve dysfunction.

Description

Multifunctional electrode for nerve electrophysiology monitoring in spinal and spinal cord operation

Technical Field

The utility model relates to a multifunctional electrode for nerve electrophysiology monitoring in spinal cord operation, belonging to the technical field of medical instruments.

Background

Spinal cord surgery is often accompanied by a potential risk of spinal cord injury, and the resulting motor dysfunction, especially paralysis, can create a heavy economic and psychosocial burden on the patient, family, and society. The nerve electrophysiology monitoring in the operation can discover nerve damage generated in the operation as early as possible, and give early warning to an operating doctor so that the operating doctor can take intervention measures in time, thereby relieving or even avoiding the nerve dysfunction after the operation. Therefore, good monitoring techniques and monitoring tools are essential for intraoperative spinal cord monitoring.

The design is mainly used for spinal surgery, and is particularly suitable for intramedullary lesion surgery. Today, modern imaging techniques are widely applied, and the localization of intramedullary diseases (such as tumors, malformations (vascular malformations), congenital lesions, inflammations, etc.) is very clear, but the functional localization cannot be achieved. The main basic functions of the spinal cord include the conduction channels of motor and sensory nerve fibers, the motor nerve fibers from the motor centers of the cerebral cortex on both sides descend to the medulla oblongata and cross to the opposite side, descend to the corresponding segments through the lateral and anterior cables on both sides of the spinal cord, and govern the muscle movement of the corresponding limbs and limbs, and the somatosensory nerves of the corresponding limbs and limbs go up to the medulla oblongata through the posterior cables of the spinal cord and cross to the opposite side, and finally reach the sensory centers of the central and posterior gyrus of the brain. In the spinal cord with the average diameter of only 10mm (6-15mm diameter), the nerve distribution is precise and orderly, and very tiny lesions can cause obvious nerve dysfunction and change of normal anatomical structural markers, thereby greatly increasing the difficulty and risk of the operation. The greatest challenges of the spinal cord with internal pathology for the surgeon include how to cut the spinal cord as safely as possible with the disappearance of normal spinal cord anatomy, to reach the intramedullary level, and how to treat the level without damaging normal spinal cord tissue structures.

The current intraoperative electrophysiological monitoring techniques for spinal cord monitoring include somatosensory evoked potentials (including spinal cord dorsal midline reversal positioning), motor evoked potentials, bulbocavernosal muscle reflex, D-waves, and the like. The dorsal median line reversal positioning of the spinal cord and the D wave monitoring are realized by directly placing electrodes on the spinal cord for monitoring. Compared with other technologies, the method can realize direct monitoring of the spinal cord, the monitoring of the motor function integrity of the spinal cord by the D wave is more specific, the influence of anesthesia is small, and the level of spinal cord injury can be judged by changing the position of the stimulation electrode.

A special electrode for spinal cord monitoring is shown in fig. 1 (Change to spinal cord electrode), and comprises an electrically insulating base body, an electric conducting element, an electrode contact and a connecting lead, wherein the electric conducting element extends through the connecting lead and connects the electrode contact and the connecting lead, and the tail end of the connecting lead is fixedly connected with a universal joint which can be directly connected with a neuroelectrophysiological monitor; the electric insulation substrate is a flexible polymer film with a plane structure or a three-dimensional structure and comprises an electrode area and a turnover area which are integrally formed and connected, the turnover area is not provided with an electrode contact, and the turnover area is positioned at one end of the electric insulation substrate close to a connecting lead. This patent is through the structure of unique book district of rolling over, and the operator can be very easily with should rolling over the district to the direction of rolling over opposite with operation field of vision direction, makes the operation field of vision in its place ahead not receive the sheltering from of electrical insulation base member and connecting lead wire completely to detection and record to the neural signal of telecommunication in the better realization operation improves the security of operation.

In use of the prior art, the electrodes are arranged in a single row, so that the function of positioning the left side and the right side of the spinal cord cannot be realized. However, in spinal cord surgery, in addition to the D-wave potential, other neuroelectrophysiological signals, such as evoked potential (SEP) generated by peripheral stimulation on the spinal cord, need to be monitored, so as to achieve more accurate positioning of the posterior cord and posterior median sulcus of the spinal cord, provide the most accurate reference data for surgical treatment, and improve the accuracy, efficiency, success rate, and the like of the surgery. In spinal cord operation, because the visual field is very narrow, the monitoring electrodes placed in two background technologies are unrealistic, so that an electrode for nerve electrophysiology monitoring in spinal cord operation with various electrode monitoring functions is needed to be designed, and the application range of the nerve electrophysiology detection technology in spinal cord operation is further expanded and enhanced. The electrodes are arranged in double rows and longitudinally, and the defect that the descending conduction bundle of the left and right movement cannot be judged by the existing spinal cord electrodes is overcome. Because the contact area of the electrode is increased, the signal intensity and the sensitivity are greatly improved, and meanwhile, the second region of the electrode is provided with the function of positioning the posterior center of the spinal cord, so that the application range of the neuro-electrophysiological monitoring technology in spinal cord spine surgery is further expanded and enhanced by the electrophysiological monitoring electrode in the multifunctional spinal cord surgery.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is as follows: provides a multifunctional nerve electrophysiology monitoring electrode which can be used for spinal cord operation, does not affect the operation visual field, is convenient to use and can be used for high-efficiency nerve function monitoring.

In order to achieve the purpose, the utility model adopts the following design scheme:

an electrode for nerve electrophysiology monitoring in spinal cord operation comprises an electrically insulating substrate, an electric conducting piece extending in the substrate, an electrode contact and a connecting lead, wherein the electric conducting piece penetrates through the connecting lead and connects the electrode contact with the connecting lead, and the tail end of the connecting lead is fixedly connected with a universal joint which can be directly connected with a nerve electrophysiology monitor;

the electric insulation substrate is a flexible polymer film with a plane structure or a three-dimensional structure and comprises a first electrode area and a second electrode area which are integrally connected, and the second electrode area is positioned at one end of the electric insulation substrate close to the connecting lead.

The first electrode area is provided with at least one pair of first electrode contacts arranged in parallel, each first electrode contact is respectively connected with different connecting leads through an electric conducting piece connected with the first electrode contact, and the first electrode contacts are symmetrically arranged on two sides of the axis of the electric insulation base body.

Preferably, the first electrode area has at least 3 pairs of first electrode contacts arranged side by side, and each adjacent pair of first electrode contacts is arranged longitudinally along the axis of the electric insulation substrate; each pair of first electrode contacts are arranged at equal or unequal intervals. The design adopts three groups of bilaterally symmetrical electrodes, which obviously increases the contact area between the electrode contact and the spinal cord compared with the original spinal cord electrode, greatly improves the recording sensitivity, and overcomes the defect that the original electrode can not be positioned left and right due to bilateral distribution.

The second electrode area is provided with at least 3 second electrode contacts which are transversely arranged, the whole second electrode contacts are vertical to the axis of the electric insulation substrate, and the second electrode contacts are arranged at equal intervals or at unequal intervals.

Preferably, the second electrode area is provided with 6-8 second electrode contacts which are transversely arranged in parallel. The design may distribute 6/8 electrodes in order from left to right. Function one: respectively recording spinal cord induced electrical energy (SEP) generated by stimulation from the periphery of the left side and the right side, and positioning the posterior median line of the spinal cord by measuring the difference of the strongest points of signals at the two sides, or having a second function: 2-8 electrodes are sequentially used as stimulating electrodes, and the retromedullary midline of the spinal cord is determined through the reversal of SEP signals recorded by cerebral cortex. Thereby positioning the posterior midline of the spinal cord quickly and accurately.

The width of the electric insulation substrate is 8-14mm, the length of the electric insulation substrate is 40-60mm, the width of the first electrode area is 8-14mm, the length of the first electrode area is 30-40mm, the width of the second electrode area is 8-14mm, and the length of the second electrode area is 8-15 mm.

The shape of the electrically insulating substrate is a regular geometric shape and combinations thereof, the regular geometric shape includes but is not limited to rectangle, ellipse, circle, triangle, pentagon, wedge, trapezoid, strip, etc.; the edge of the electric insulation substrate is a straight line or a curve; the shape of the electrode contact is a geometric shape and a combination shape thereof, the geometric shape comprises but is not limited to a circle, an ellipse, a rectangle, a pentagon, a hexagon and a strip, the whole electrode contact is rectangular, and the edge of the electrode contact is a straight line or a curve.

The connecting lead is led out from the end of the electric insulation base body in a direction of not contacting the spinal cord; or the flexible wire is led out upwards from the surface of one side of the electric insulation matrix, which is not contacted with the spinal cord, and the flexible wire is led out from one side of the tail end of the electrode; or the end of the electric insulation substrate is folded back.

And a stable reinforcing structure is arranged at the position where the connecting lead is led out of the electric insulating base body.

The first electrode contact and the second electrode contact are made of metal materials, and the electrode contacts are used for forming effective contact surfaces with nerves to carry out alternating current of electric signals. The position of the nerve site to be monitored can be precisely measured and designed to provide the optimal sensing position for each electrode contact, so that the distances between them can be equal or unequal, and generally equal is more convenient to produce and manufacture.

And the surfaces of the first electrode contact and the second electrode contact are provided with coatings or grains. The surface texture can be formed by metal etching to increase the sensitivity of the electrical signal.

The electric conducting piece is a metal wire or a liquid metal circuit; these technical features and implementations are prior art, and the use of liquid metal circuits has better flexibility, while the use of metal wires has cost advantages.

The electrically insulating substrate is made of a biocompatible polymer film material. The film material has both flexibility and certain hardness. The material of the electrically insulating substrate belongs to the prior art, and any material conventionally used in the field can be adopted. The matrix material enables the electrode to have certain hardness, and is convenient to be placed along the spinal cord in a pushing mode; meanwhile, the material is soft, the biocompatibility of the material is good, and the spinal cord injury caused by the placement of the electrodes is avoided.

The connecting lead is made of an electrically insulating polymer material, preferably an electrically insulating polymer material with high flexibility.

The utility model is one of the innovation points of the utility model that two electrode areas for detecting different electric signals are arranged in the same electric insulation substrate. In the present invention, the second electrode region is not an extension of the first electrode region, but is a structure designed for specific neuroelectrophysiological detection purposes. In the operation, the first electrode area corresponds to the D wave electrode monitoring, the first electrode area in the design is mainly used for recording 'D' waves (action evoked potentials which are recorded in the spinal cord and generated by stimulating the brain motor center) and designing the electrode contact point of the area, so that the contact area is effectively increased, namely, the signal recording sensitivity is increased, and in addition, the longitudinal double-row layout is adopted, so that the defect that the existing electrode cannot judge the side difference is overcome, the specificity is improved, the occurrence of false negative is reduced, the 'D' waves which are recorded in real time are timely fed back to an operator, and the motor nerve function states of different sides can be timely known.

The second electrode area corresponds to a spinal cord posterior cord midline positioning electrode, which is two different applications, the patent combines the two electrodes into one, and the multifunctional electrode for nerve electrophysiology monitoring, which can monitor various nerve electrophysiology signals in spinal cord operation, is developed for the first time. According to the physiological anatomical characteristics that ascending sensory nerves respectively ascend at the posterior cord of the spinal cord on the same side, 6-8 electrodes arranged in a longitudinal mode can record the intensity gradient of signals of the ascending sensory nerves on two sides finely, a posterior median line of the spinal cord can be judged after the signal gradients on two sides are compared, and the median line is usually used as a safety area entering the spinal cord by an operator.

The cooperative application of the first electrode region and the second electrode region can also expand the monitoring function in the operation, for example, the second region can be used as a stimulating electrode, and under the condition that the first region electrode is used as a reference electrode, the cortical somatosensory evoked potential is recorded, so that the judgment of the posterior midline of the spinal cord is realized, or the continuous monitoring of the ascending conduction function of the posterior cord of the spinal cord is performed. Conversely, the first electrode area can also be used as a stimulating electrode for detecting the nerve conduction function of the operation area in the operation.

Preferably, the whole electrode is designed to be strip-shaped, the coronal section is semi-cylindrical, the longitudinal middle part of the electrode is slightly thicker than the two sides so as to increase the longitudinal elasticity of the electrode, thus being beneficial to being placed downwards to the dura mater, and simultaneously, the transverse flexibility of the electrode is not lost and the electrode is attached to the surface of the spinal cord appropriately. Compared with the existing spinal cord recording electrode, the electrode is easier to be placed under the dura mater and can be stably placed on the surface of the posterior cord of the spinal cord, so that the multifunctional monitoring of the electrode becomes possible.

The whole electrode is in a longitudinal strip shape and is divided into an electrode spinal cord contact surface (lower surface) and an electrode back surface (upper surface), the electrode contact is positioned on the electrode spinal cord contact surface (lower surface), and the electrode contact mark is positioned on the electrode back surface (upper surface).

The utility model also adopts a lead-out mode which does not shield the operation visual field, and finally realizes the monitoring of the nerve electrical signals in the operation process by connecting the connecting lead with the main stream electrophysiological monitor under the condition of not shielding the operation visual field. The other innovative design of the utility model is that a design structure for leading out the lead from the surface of one side of the electric insulation substrate is developed, the current situation that the electrode leads are all led out from the tail end of the electric insulation substrate at present is broken through, the shielding of the surgical field of view is further reduced, and the edge part of the tail end of the electric insulation substrate is made as short as possible, so that the overall length of the electrode can be reduced, the electric insulation substrate can be made shorter and more compact, and the electrode is suitable for monitoring the operation of patients with various body types and ages. In addition, the design can also increase the supporting force from top to bottom for the electric insulation base body, so that the other side is tightly attached to the spinal cord to acquire signals more accurately, and the problem that the electrode cannot be tightly attached to the spinal cord due to the lifting or turning acting force caused by the structure that the connecting lead is positioned at the tail end of the electric insulation base body in the prior art is solved.

The utility model has the advantages that: the multifunctional nerve electrophysiology monitoring instrument has two groups of electrode areas, can realize multifunctional nerve electrophysiology data monitoring, is applied to double electrodes, can be used as a spinal cord stimulation and recording electrode, has multiple functions of one electrode, and is characterized in that a connecting lead is led out from the back of the electrode, so that the effective utilization of the electrode is effectively improved, and the influence on the visual field of an operation is greatly reduced. The product has better adaptability with spinal cord operation, can effectively realize the monitoring of spinal cord electrophysiological signals in operation, is easy to place and take out, does not shield the operation visual field, and does not occupy the effective operation space of doctors; the electrode base material is soft, the biocompatibility of the material is good, the spinal cord injury caused by the placement of the electrode is avoided, and the electrode is convenient to use in spinal cord surgery. The spinal cord dorsal midline positioning and D-wave spinal cord monitoring device can be used for spinal cord dorsal midline positioning and spinal cord D-wave monitoring in spinal cord surgeries, effectively improves the effect of spinal cord electrophysiological monitoring in surgeries, reduces spinal cord injuries in surgeries, reduces the incidence rate of postoperative nerve dysfunction, and benefits a great number of spinal cord disease patients.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the utility model and together with the description serve to explain the utility model without limiting the utility model. In the drawings:

FIG. 1 shows a prior art electrode structure diagram

FIG. 2 is a rear view structural view of embodiment 1

FIG. 3 is a sectional view taken along line A-A in example 1

FIG. 4 is a B-B sectional view showing embodiment 1

FIG. 5 is a perspective view showing the structure of example 1

FIG. 6 is a reference diagram showing the state of use of embodiment 1

FIG. 7 is a block diagram showing embodiment 2

Fig. 8A shows a cross-sectional view of the front first electrode region of example 2

Fig. 8B shows a cross-sectional view of the rear second electrode region of example 2

FIG. 9 is a block diagram showing embodiment 3

FIG. 10 is a block diagram showing embodiment 4

The respective symbols in the figure are as follows: 1-electrode, 2-electric insulation base body, 21-first electrode area, 22-second electrode area, 23-end extension part 23 of electric insulation base body, 3-first electrode contact, 4-second electrode contact, 5-electric conducting piece, 6-connecting lead, 61-protective layer, 7-universal joint, 8-spinal cord, 81-tumor, 82-dura mater, and 9-neuroelectrophysiology instrument.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the utility model without any inventive step, are within the scope of protection of the utility model.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the present invention, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the description and claims of the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one.

Fig. 1 shows a prior art electrode in which the rear portion of the substrate is not provided with a second electrode region.

Example 1:

as shown in fig. 2 to 5, an electrode 1 for monitoring neuroelectrophysiology in spinal cord surgery, which comprises an electrically insulating base 2 having an electrically conductive member 5 extending therein, a first electrode contact 3, a second electrode contact 4 and a connecting lead 6, wherein the electrically conductive member 5 penetrates the connecting lead 6 and connects the first electrode contact 3, the second electrode contact 4 and the connecting lead 6, and the connecting lead 6 is fixedly connected with a universal joint 7 at the end thereof, and can be directly connected with a neuroelectrophysiology monitor;

the electrically insulating base body 2 is a flexible polymer film with a planar structure or a three-dimensional structure, and comprises a first electrode region 21 and a second electrode region 22 which are integrally connected, and the second electrode region 22 is positioned at one end of the electrically insulating base body 2 close to the connecting lead 6.

The first electrode area 21 has 3 pairs of first electrode contacts 3 arranged in parallel, each first electrode contact 3 is connected to a different connecting lead 6 by an electrical conducting element 5 connected thereto, and the first electrode contacts 3 are symmetrically arranged on both sides of the axis of the electrically insulating base body 2. Each adjacent pair of first electrode contacts 3 is arranged longitudinally along the axis of the electric insulation base body 2; each pair of first electrode contacts 3 is arranged at equal intervals.

The second electrode regions 22 are provided with 6 second electrode contacts 4 which are transversely arranged, the whole second electrode contacts 4 are vertical to the axis of the electric insulation substrate 2, and the second electrode contacts 4 are arranged at equal intervals.

The electrically insulating base body 2 has a width of approximately 10mm and a length of approximately 50mm, wherein the first electrode regions 21 have a width of 9mm and a length of 35mm, and the second electrode regions 22 have a width of 11mm and a length of 15 mm.

The electrically insulating base body 2 is strip-shaped as a whole; the edge of the electric insulation base body 2 is composed of straight lines and arc lines, the first electrode contact 3 and the second electrode contact 4 are both in a shape of a rounded rectangle, and the edge of the first electrode contact 3 and the edge of the second electrode contact 4 are composed of the straight lines and the arc lines.

The connecting lead 6 is led out from one side of the electrode tail end of the side of the electric insulating base body 2 which is not contacted with the spinal cord, and the outer part of the connecting lead is provided with a protective layer 61 which is flexible and bendable.

The first electrode contact 3 and the second electrode contact 4 are both made of metal materials, and the surfaces of the first electrode contact and the second electrode contact are provided with coatings or lines; the electric conducting part 5 is a metal wire or a liquid metal circuit; the electrically insulating substrate 2 is made of a biocompatible polymer film material, and the connecting lead 6 is made of an electrically insulating polymer material.

Fig. 6 shows a state of the present invention in use (example 1), where a tumor 81 is growing on the spinal cord 8 of a patient and needs to be removed during surgery.

1. The first electrode region 21 and the second electrode region 22 of the electrically insulating substrate 2 are inserted into the lower opening of the dura mater 82 of a patient, so that the first electrode contact 3 and the second electrode contact 4 are effectively contacted with the surface of the spinal cord.

2. The connecting lead 6 is placed in a turning-back way towards the direction opposite to the surgical visual field direction;

3. the fixation can be performed by attaching the upper part of the lead 6 with a surgical drape cover (the covering is not shown in the figure).

4. The universal joint 7 fixedly connected with the tail end of the connecting lead 6 is directly connected to the nerve electrophysiology monitor, so that the monitoring function in the operation is realized.

Example 2

As shown in fig. 7 and fig. 8A and 8B, an electrode 1 for monitoring neuroelectrophysiology in spinal cord operation comprises an electrically insulating base 2 having an electric conducting member 5 extending inside, a first electrode contact 3, a second electrode contact 4 and a connecting lead 6, wherein the electric conducting member 5 penetrates through the connecting lead 6 and connects the first electrode contact 3, the second electrode contact 4 and the connecting lead 6, and the connecting lead 6 is fixedly connected with a universal joint 7 at the end for directly connecting a neuroelectrophysiology monitor;

The connecting lead 6 is led out from the middle part of the end of the electric insulating base body 2 in the direction of not contacting the spinal cord, and the outer part is provided with a protective layer 61 which is flexible and bendable.

The first electrode contact 3 and the second electrode contact 4 are both made of metal materials, and the surfaces of the first electrode contact and the second electrode contact are provided with coatings or grains; the electric conducting part 5 is a metal wire or a liquid metal circuit; the electrically insulating substrate 2 is made of a biocompatible polymer film material, and the connecting lead 6 is made of an electrically insulating polymer material.

As shown in fig. 8A and 8B, the whole electrode is designed to be a strip, the coronal section is a half-cylinder, the longitudinal middle part of the electrical insulation base 2 of the electrode is slightly thicker than the two sides, so as to increase the longitudinal elasticity of the electrode, which is beneficial for placing the electrode downwards, and meanwhile, the transverse flexibility of the electrode is not lost and the electrode is properly attached to the surface of the spinal cord. Compared with the existing spinal cord recording electrode, the electrode is easier to be placed under the dura mater and can be stably placed on the surface of the posterior cord of the spinal cord, so that the multifunctional monitoring of the electrode becomes possible.

Example 3

As shown in fig. 9, an electrode 1 for monitoring neuroelectrophysiology in spinal cord operation, which comprises an electrically insulating base 2 having an electric conducting member 5 extending therein, a first electrode contact 3, a second electrode contact 4 and a connecting lead 6, wherein the electric conducting member 5 penetrates through the connecting lead 6 and connects the first electrode contact 3, the second electrode contact 4 and the connecting lead 6, and the end of the connecting lead 6 is fixedly connected with a universal joint 7 which can be directly connected with a neuroelectrophysiology monitor;

The electrically insulating base body 2 has an approximate width of 10mm and a length of 50mm, wherein the first electrode regions 21 have a width of 9mm and a length of 35mm, and the second electrode regions 22 have a width of 11mm and a length of 15 mm.

The connecting lead 6 is led out from the end side of the electrically insulating base body 2 perpendicularly toward a direction not contacting the spinal cord. The outer part of the connecting lead is provided with a protective layer 61 which is soft and bendable.

The first electrode contact 3 and the second electrode contact 4 are both made of metal materials, and the surfaces of the first electrode contact and the second electrode contact are provided with coatings or grains; the electric conducting piece 5 is a metal wire or a liquid metal circuit; the electrically insulating substrate 2 is made of a biocompatible polymer film material, and the connecting lead 6 is made of an electrically insulating polymer material.

Example 4

As shown in fig. 10, an electrode 1 for monitoring neuroelectrophysiology in spinal cord operation, which comprises an electrically insulating base 2 having an electric conducting member 5 extending therein, a first electrode contact 3, a second electrode contact 4 and a connecting lead 6, wherein the electric conducting member 5 penetrates through the connecting lead 6 and connects the first electrode contact 3, the second electrode contact 4 and the connecting lead 6, and the end of the connecting lead 6 is fixedly connected with a universal joint 7 which can be directly connected with a neuroelectrophysiology monitor;

The connecting lead 6 is led out from a terminal extension 23 of the electrically insulating base body 2, and the terminal extension 23 is 5cm long, has no electrode contact, is flexible and bendable, and can be folded back in a direction not contacting the spinal cord. When in use, the operation towel is used for pressing the folded part, so that the fixation can be realized, and the purpose of not shielding the operation visual field can be realized.

The above listing of a series of detailed descriptions is merely a detailed description of possible embodiments of the present invention and is not intended to limit the scope of the utility model, and one skilled in the art may devise many other modifications and embodiments that will fall within the spirit and scope of the principles disclosed herein. More specifically, various variations and modifications are possible in the component parts and/or arrangements of the subject combination arrangement within the scope of the disclosure, the drawings and the appended claims. In addition to variations and modifications in the component parts and/or arrangements, other uses will also be apparent to those skilled in the art.

In summary, the above-mentioned embodiments are only preferred embodiments of the present invention, and all equivalent changes and modifications made in the claims of the present invention should be covered by the claims of the present invention.

Claims

1. An electrode for monitoring nerve electrophysiology in spinal cord operation, which is characterized in that: the nerve electrophysiology monitoring instrument comprises an electric insulation substrate, wherein the substrate is provided with an electric conduction piece, an electrode contact and a connecting lead, the electric conduction piece extends in the substrate, the electric conduction piece penetrates through the connecting lead and connects the electrode contact with the connecting lead, and the tail end of the connecting lead is fixedly connected with a universal joint which can be directly connected with the nerve electrophysiology monitoring instrument;

2. The electrode for nerve electrophysiology monitoring in spinal cord surgery according to claim 1, wherein: the first electrode area is provided with at least one pair of first electrode contacts arranged in parallel, each first electrode contact is respectively connected with different connecting leads through an electric conducting piece connected with the first electrode contact, and the first electrode contacts are symmetrically arranged on two sides of the axis of the electric insulation base body.

3. The electrode for nerve electrophysiology monitoring in spinal cord surgery according to claim 2, wherein: the first electrode area is provided with at least 3 pairs of first electrode contacts arranged in parallel, and each adjacent pair of first electrode contacts are longitudinally arranged along the axis of the electric insulation substrate; each pair of first electrode contacts are arranged at equal or unequal intervals.

4. The electrode for the neurophysiological monitoring during spinal cord surgery according to claim 1, wherein: the second electrode area is provided with at least 3 second electrode contacts which are transversely arranged, the arrangement of the second electrode contacts is vertical to the axis of the electric insulation substrate, and the second electrode contacts are arranged at equal intervals or at unequal intervals.

5. The electrode for nerve electrophysiology monitoring in spinal cord surgery according to claim 4, wherein: the second electrode area is provided with 6-8 second electrode contacts which are transversely arranged in parallel.

6. The electrode for nerve electrophysiology monitoring in spinal cord surgery according to any one of claims 1 to 5, wherein: the width of the electric insulation substrate is 8-14mm, the length is 40-60mm, wherein the width of the first electrode area is 8-14mm, the length is 30-40mm, the width of the second electrode area is 8-14mm, and the length is 8-15 mm.

7. The electrode for nerve electrophysiology monitoring in spinal cord surgery according to claim 2, wherein: the shape of the electrically insulating substrate is a regular geometric shape and combinations thereof, the regular geometric shape including but not limited to rectangular, oval, circular, triangular, pentagonal, wedge-shaped, trapezoidal or bar-shaped; the edge of the electric insulation substrate is a straight line or a curve; the shape of the first electrode contact and the second electrode contact is a geometric shape and a combination shape thereof, the geometric shape includes but is not limited to a circle, an ellipse, a rectangle, a pentagon, a hexagon and a bar, the whole is a rectangle, and the edge of the electrode contact is a straight line or a curve.

8. The electrode for the neurophysiological monitoring during spinal cord surgery of claim 7, wherein: the connecting lead is led out from the end of the electric insulation base body in a direction of not contacting the spinal cord; or the flexible wire is led out upwards from the surface of one side of the electric insulation matrix, which is not contacted with the spinal cord, and the flexible wire is led out from one side of the tail end of the electrode; or the end of the electrically insulating substrate is folded back.

9. The electrode for nerve electrophysiology monitoring in spinal cord surgery according to claim 8, wherein: and a stable reinforcing structure is arranged at the position where the connecting lead is led out of the electric insulating base body.

10. An intra-spinal cord surgery neurophysiological monitoring electrode according to any one of claims 2, 3, 7, 8 or 9, wherein: the first electrode contact and the second electrode contact are made of metal materials, and coatings or lines are arranged on the surfaces of the first electrode contact and the second electrode contact; the electric conducting piece is a metal wire or a liquid metal circuit; the electric insulation substrate is made of a polymer film material with biocompatibility, and the connecting lead is made of an electric insulation high polymer material.