Long-needle electrode for deep brain

Abstract

The utility model discloses a deep brain long needle electrode, which comprises a needle body, at least one connecting part and a contact assembly, the connecting part is detachably connected with the needle body, the contact assembly comprises a flexible part and a plurality of electric contacts, the flexible part is connected with the at least one connecting part and can wrap or fall off the outer surface of the needle body, and the electric contacts are electrically connected with the flexible part. The plurality of electric contacts are distributed at intervals along the surface of the flexible part and are connected to the flexible part. The utility model can effectively solve the problems that the diameter of the whole probe is increased due to the fact that a large number of conductive wires are needed for increasing the number of channels, and brain tissues are damaged due to the increased diameter of the probe.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of biomedical engineering, and specifically relates to a deep brain long needle electrode. BACKGROUND

[0002] The nerve excitation probe can detect the electrical signal parameters of the living nerve cell when the nerve cell is excited.

[0003] For example, the Chinese utility model patent with the publication number CN217310321U, named as a medical disposable deep brain electrode, comprises an electrode implanting part and an electrode non-implanting part. The electrode implanting part comprises a distal tube, a reinforcing tube, a safety line, a main tube and a main protection tube; the electrode non-implanting part comprises a reinforcing tube, a safety line, a main tube, a main protection tube, a transition tube, a plug, a cap, a sealing sleeve, a protection tube, and the plug internal pin is connected and conducted with the signal line. The device can be used as a valuable auxiliary means for the diagnosis and treatment of refractory epilepsy such as epilepsy resistance, and the electrode is implanted into the human brain through surgical operation, and is used in combination with a recording, monitoring and stimulation system to perform stereotactic electroencephalogram recording (SEEG), monitoring and short-time stimulation for preoperative diagnosis of people with epilepsy. However, the traditional manual processing and manufacturing method needs precise machining and manufacturing, and only a single channel recording electrophysiological signal can be performed by using a guide wire, and a large-scale electrode point array cannot be machined, and if the number of channels is increased, a large number of conductive wires are needed to increase the overall needle diameter and increase the damage to the brain tissue.

[0004] Therefore, there is an urgent need for a deep brain long needle electrode to solve the problem that the diameter of the overall probe increases due to the need for a large number of conductive wires to increase the number of channels, and the increased probe diameter causes damage to the brain tissue. UTILITY MODEL CONTENT

[0005] The utility model aims at overcoming the above technical defects, and provides a deep brain long needle electrode to solve the technical problem that the diameter of the overall probe increases due to the need for a large number of conductive wires to increase the number of channels, and the increased probe diameter causes damage to the brain tissue.

[0006] To achieve the above technical purpose, the utility model adopts the following technical scheme:

[0007] The utility model provides a deep brain long needle electrode, which comprises:

[0008] A needle body;

[0009] At least one connecting part, which is detachably connected with the needle body; and

[0010] The contact assembly comprises a flexible part and a plurality of electrical contacts, the flexible part is connected to at least one of the connecting parts and can wrap or fall off the outer surface of the needle body, and the plurality of electrical contacts are spaced apart along the surface of the flexible part and are connected to the flexible part.

[0011] In some embodiments, the needle body is in an elongated cylindrical shape and has a first segment and a second segment, and the flexible part wraps the circumferential surface of the first segment.

[0012] In some embodiments, the first segment of the needle body is formed with an insertion part in a direction away from the second segment of the needle body, the cross-sectional area of the insertion part gradually decreases in a direction away from the second segment, and the insertion part is formed with a tip.

[0013] In some embodiments, the farthest end of the insertion part away from the second segment of the needle body is formed with a circular arc chamfer.

[0014] In some embodiments, the plurality of electrical contacts are arranged in a rectangular array along the surface of the flexible part and are connected to the flexible part, and the number of electrical contacts is not less than 64.

[0015] In some embodiments, two adjacent electrical contacts arranged along the axial direction of the needle body are enclosed to form a mounting groove, and the connecting part is connected to the flexible part via the mounting groove.

[0016] In some embodiments, the first segment of the needle body is provided with at least one annular clamping groove relative to the mounting groove, the connecting part is in a circular ring shape and is sleeved on the mounting groove, and the connecting part can be clamped with the annular clamping groove, so as to connect the flexible part to the first segment of the needle body.

[0017] In some embodiments, the number of annular clamping grooves on the first segment of the needle body is a plurality, and the plurality of annular clamping grooves are spaced apart along the axial direction of the needle body, and the connecting part is arranged one-to-one corresponding to the annular clamping grooves.

[0018] In some embodiments, the connecting part is flexible.

[0019] In some embodiments, the connecting rope is a circle or a rope body.

[0020] Compared with the prior art, the brain deep long needle electrode has the beneficial effects that the plurality of electric contacts are distributed at intervals along the surface of the flexible part and are connected to the flexible part, the flexible part can be wrapped on the outer surface of the needle body, at least one connecting part is connected to the flexible part and can be detachably connected with the needle body, and the flexible part and the plurality of electric contacts are connected to the outer surface of the needle body. Compared with the prior art, the plurality of electric contacts are arranged on the outer surface of the needle body through the flexible part and the connecting part, so that the deep brain stimulation electrode with high channel number, bidirectionality and low power consumption can be realized, accurate recording and stimulation of the target nuclear group are realized, energy consumption is low, brain tissue damage caused by the increase of the diameter of the whole needle due to the increase of the channel number is avoided, and the technical problem that the diameter of the whole probe is increased due to the need of a large number of conductive wires due to the increase of the channel number in the prior art can be solved. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a three-dimensional structure schematic view of a brain deep long needle electrode provided by an embodiment of the present application;

[0022] Figure 2 is a three-dimensional structure schematic view of a needle body provided by an embodiment of the present application;

[0023] Figure 3 is a structure schematic view of the flexible part connected with the plurality of electric contacts provided by an embodiment of the present application;

[0024] Figure 4 is a structure schematic view of the needle body connected with the flexible part and the plurality of electric contacts provided by an embodiment of the present application;

[0025] Figure 5 is a three-dimensional structure schematic view of the needle body connected with the contact assembly and the plurality of connecting parts provided by an embodiment of the present application.

[0026] BRIEF DESCRIPTION OF DRAWINGS

[0027] Needle body 1; insertion part 11; annular clamping groove 12; contact assembly 2; flexible part 21; electric contact 22; mounting groove 23; connecting part 3. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.

[0029] In order to solve the technical problem that the diameter of the whole probe is increased due to the increase of the number of channels, the increased diameter of the probe causes damage to the brain tissue, the utility model provides a brain deep long needle electrode, can realize through flexible part 21 and connecting part 3 multiple electric contacts 22 are arranged on the outer surface of needle body 1, can realize high channel number, two -way and low -power consumption deep brain stimulation electrode, realize the accuracy record and stimulation of target nuclear group and energy loss is low, avoid the increase of the diameter of the whole needle due to the increase of the number of channels and cause damage to the brain tissue.

[0030] It should be noted that the brain deep long needle electrode is used in but not limited to biomedical engineering technical field and so on, in order to be convenient for indicating, in the utility model, only with the brain deep long needle electrode application in biomedical engineering technical field as an example is indicated, and the principle of the brain deep long needle electrode application in other types of equipment and the principle of application in biomedical engineering technical field are substantially same, do not repeat here.

[0031] Please refer to Figures 1 to 5 , Figure 1 , Figure 5 It is the structure schematic drawing of brain deep long needle electrode in an embodiment of the utility model, and the brain deep long needle electrode includes: needle body 1, at least one connecting part 3 and contact assembly 2, connecting part 3 is detachably connected with needle body 1, contact assembly 2 includes flexible part 21 and multiple electric contacts 22, flexible part 21 is connected with at least one connecting part 3, and can wrap or separate the outer surface of needle body 1, multiple electric contacts 22 are spaced apart along the surface of flexible part 21, and are all connected to flexible part 21.

[0032] In the device, multiple electric contacts 22 are spaced apart along the surface of flexible part 21, and are all connected to flexible part 21, flexible part 21 can wrap the outer surface of needle body 1, at least one connecting part 3 is connected to flexible part 21, and can be detachably connected with needle body 1, for connecting flexible part 21 and multiple electric contacts 22 to the outer surface of needle body 1.

[0033] Compared with the prior art, multiple electric contacts 22 are arranged on the outer surface of needle body 1 through flexible part 21 and connecting part 3, which can realize high channel number, two -way and low -power consumption deep brain stimulation electrode, realize the accuracy record and stimulation of target nuclear group and energy loss is low, avoid the increase of the diameter of the whole needle due to the increase of the number of channels and cause damage to the brain tissue, which can solve the technical problem that the diameter of the whole probe is increased due to the increase of the number of channels in the prior art, the increased diameter of the probe causes damage to the brain tissue.

[0034] Further, the flexible part 21 is made of a flexible electrode using a micro-nano processing technology such as MEMS (screen printing technology), laser, etc. The base material is not limited to polyimide / polyurethane, perilyl, and other high biocompatible materials. The electric contact 22 is made of platinum / platinum-iridium, iridium oxide, titanium nitride, and other biocompatible metal materials. Based on the micro-nano processing technology, the width of the flexible electrode can be hundreds of channels, and the flexible electrode is attached to the needle body 1. Details are not described herein.

[0035] In the embodiment, as shown in Figure 1 , Figure 2 , the needle body 1 is in an elongated cylindrical shape and has a first segment and a second segment. The flexible part 21 is wrapped around the circumferential surface of the first segment.

[0036] The needle body 1 is divided into a first segment and a second segment. The outer surface of the first segment is provided with a flexible part 21 and a plurality of contacts, which are used to implant in a designated area of a to-be-implanted person. The second segment is used to realize electrical conduction with an external device. Details are not described herein.

[0037] In one of the embodiments, as shown in Figure 2 , the first segment of the needle body 1 is formed with an insertion part 11 in a direction away from the second segment of the needle body 1. The cross-sectional area of the insertion part 11 gradually decreases in a direction away from the second segment, and a sharp end is formed.

[0038] By providing the insertion part 11 with a cross-sectional area gradually decreasing in a direction away from the second segment at the distal end away from the second segment, the implantation of the needle body 1 can be facilitated.

[0039] In one of the embodiments, as shown in Figure 2 , the farthest end of the insertion part 11 away from the second segment of the needle body 1 is formed with a circular arc chamfer.

[0040] By providing the sharp end with a circular arc chamfer, the damage to brain tissue caused by the insertion part 11 being too sharp can be avoided.

[0041] Further, the needle body 1 is an extremely thin rigid cylindrical needle, and the material is not limited to stainless steel, titanium alloy, polysilicon, tungsten steel, and other high Young's modulus materials. The main function is to serve as a rigid needle core of the electrode to realize implantation guidance. The bottom end of the rigid needle is chamfered and polished to meet the requirements of implantation into the human body and reduce damage to small blood vessels.

[0042] In the embodiment, as shown in Figure 3 , Figure 4 , the plurality of electric contacts 22 are distributed in a rectangular array on the surface of the flexible part 21 and are all connected to the flexible part 21. The number of electric contacts 22 is not less than 64.

[0043] The plurality of electrical contacts 22 are distributed along the circumferential direction of the needle body 1, and the deep brain stimulation electrode with high channel number, bidirectional and low power consumption can be realized, the accurate recording and stimulation of the target nucleus group can be realized, and the energy loss is low.

[0044] Further, the number of the electrical contacts 22 is greater than 64.

[0045] In one of the embodiments, referring to Figure 3 , the mounting groove 23 is formed between the two adjacent electrical contacts 22 along the axial direction of the needle body 1, and the connecting part 3 is connected to the flexible part 21 through the mounting groove 23.

[0046] The connecting part 3 is arranged between the two adjacent electrical contacts 22, and is used to realize the connection between the connecting part 3.

[0047] In one of the embodiments, referring to Figure 2 , Figure 5 , the first segment of the needle body 1 is provided with at least one annular clamping groove 12 relative to the mounting groove 23, the connecting part 3 is in the form of a ring and is sleeved on the mounting groove 23, and the connecting part 3 can be clamped with the annular clamping groove 12, so as to connect the flexible part 21 to the first segment of the needle body 1.

[0048] Through the clamping mode, the detachable connection between the connecting part 3 and the annular clamping groove 12 is realized, and the flexible part 21 between the connecting part 3 and the annular clamping groove 12 can be clamped.

[0049] In one of the embodiments, referring to Figure 2 , Figure 5 , the number of the annular clamping grooves 12 on the first segment of the needle body 1 is a plurality, the plurality of annular clamping grooves 12 are distributed along the axial direction of the needle body 1, and the connecting part 3 is arranged in one-to-one correspondence with the annular clamping grooves 12.

[0050] The plurality of connecting parts 3 are distributed along the axial direction of the needle body 1, and the stability of the connection between the flexible part 21 and the needle body 1 can be improved.

[0051] In one of the embodiments, the connecting part 3 has flexibility.

[0052] The flexible connecting part 3 is clamped with the annular clamping groove 12, and the stability of the connection between the flexible part 21 and the needle body 1 can be improved.

[0053] Further, the connecting part 3 is a flexible small collar which is common in the market and easy to purchase, and is embedded in the annular clamping groove 12 on the surface of the needle body 1, so as to limit the flexible part 21 and make it adhere to the surface of the hard needle.

[0054] In one of the embodiments, the connecting part 3 is a circle or a rope.

[0055] The connecting part 3 can be a circle, and the flexible part 21 is tightly buckled on the surface of the needle body 1.

[0056] Further, the connecting part 3 can also be a rope with two ends disconnected, and the flexible part 21 is connected on the surface of the needle body 1 by a binding manner.

[0057] In order to better understand the present application, the following will be combined with Figures 1 to 5 The technical scheme of the present application will be described in detail:

[0058] The plurality of electric contacts 22 are spaced apart along the surface of the flexible part 21 and are all connected to the flexible part 21. The flexible part 21 can be wrapped on the outer surface of the needle body 1. The at least one connecting part 3 is connected to the flexible part 21 and can be detachably connected with the needle body 1, for connecting the flexible part 21 and the plurality of electric contacts 22 to the outer surface of the needle body 1. Compared with the prior art, the plurality of electric contacts 22 are arranged on the outer surface of the needle body 1 by the flexible part 21 and the connecting part 3, so that a deep brain stimulation electrode with high channel number, bidirectional and low power consumption can be realized, accurate recording and stimulation of target nuclear groups are realized, energy consumption is low, and brain tissue damage caused by increase of the diameter of the whole needle due to increase of the channel number is avoided.

[0059] Further, the flexible electrode can be integrated with high flux, bidirectional, low power consumption and ultra-thin electrode by MEMS process technology and CMOS circuit integration technology, and is implanted into deep brain nuclear groups to reduce tissue damage. The flexible electrode is fixed by a binding design, is not bonded to be flexibly attached to the hard needle, and can overcome the shortcomings of the prior art, such as less deep brain electrode channel number, only unidirectional stimulation, large damage, and the like.

[0060] Further, the MEMS process technology and the CMOS circuit integration technology are conventional settings known to those skilled in the art, and will not be described in detail here.

[0061] The device can solve the technical problem that the diameter of the whole probe is increased due to a large number of conductive wires caused by increase of the channel number in the prior art, and the increased probe diameter causes damage to brain tissue.

[0062] The specific embodiments of the present application described above do not constitute a limitation on the protection scope of the present application. Any other corresponding changes and modifications made according to the technical concept of the present application should be included in the protection scope of the claims of the present application.

Claims

1. A deep brain long needle electrode, characterized by, The utility model relates to a needle body, at least one connecting part detachably connected with the needle body, and a contact assembly comprising a flexible part connected with the at least one connecting part and capable of wrapping or shedding the outer surface of the needle body, and a plurality of electrical contacts spaced apart along the surface of the flexible part and each connected to the flexible part. The needle body is in the shape of an elongated cylinder and has a first section and a second section, and the flexible part wraps around the circumferential surface of the first section. The first section of the needle body is formed with an insertion part in a direction away from the second section of the needle body, the cross-sectional area of the insertion part gradually decreases in a direction away from the second section, and the insertion part is formed with a pointed end. The farthest end of the insertion part away from the second section of the needle body is formed with a circular arc chamfer. The plurality of electrical contacts are arranged in a rectangular array along the surface of the flexible part and each connected to the flexible part, and the number of the electrical contacts is not less than 64.

2. The deep brain needle electrode of claim 1, wherein, An installation groove is formed between two adjacent electrical contacts arranged in the axial direction of the needle body, and the connecting part is connected to the flexible part via the installation groove.

3. The deep brain long needle electrode according to claim 2, characterized in that, The first section of the needle body is provided with at least one annular clamping groove relative to the installation groove, the connecting part is in the shape of a ring and is sleeved on the installation groove, and the connecting part can be clamped with the annular clamping groove to connect the flexible part to the first section of the needle body.

4. The deep brain long needle electrode of claim 3, wherein, The number of the annular clamping grooves on the first section of the needle body is a plurality, and the plurality of annular clamping grooves are spaced apart in the axial direction of the needle body, and the connecting part is arranged one-to-one with the annular clamping grooves.

5. The deep brain long needle electrode of claim 2, wherein, The connecting part is flexible.

6. The deep brain long needle electrode of claim 5, wherein, The connecting part is in the shape of a ring or a rope.

7. The deep brain long needle electrode according to claim 6, characterized in that ​ 8. The deep brain long needle electrode according to claim 7, characterized in that, ​ 9. The deep brain long needle electrode of claim 1, wherein, ​ 10. The deep brain long needle electrode of claim 1, wherein, ​

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