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CN-224220585-U - Electrode fixing device

CN224220585UCN 224220585 UCN224220585 UCN 224220585UCN-224220585-U

Abstract

The application relates to an electrode fixing device, and belongs to the field of medical appliances. The electrode fixing device comprises the bone nail, the silica gel plug, the clamping piece and the electrode cap, wherein the screw thread of the screw rod on the bone nail can enable the bone nail to be fixed on the skull, the electrode sequentially penetrates through the channel and the through hole of the silica gel plug and stretches into the skull from the outside of the skull, and the clamping piece applies inward shrinkage pressure to the silica gel plug, so that the electrode in the silica gel plug can be tightly held, and the sealing effect is achieved. Meanwhile, due to the fact that the related structures are arranged in the cavity inside the bone nail, when the electrode fixing device of the embodiment is used, the diameter of the hole drilled above the skull is small, the height is low, the trauma of an operation on a patient can be reduced, and the risk of infection is reduced.

Inventors

  • BAO HONGFENG
  • JIANG JUNTING
  • DU YUHUI

Assignees

  • 常州瑞神安医疗器械有限公司

Dates

Publication Date
20260512
Application Date
20250403

Claims (9)

  1. 1. An electrode fixing device, characterized by comprising: The bone screw (10) comprises a head (101) and a screw (102), wherein a through hole (1021) is formed in the middle of the screw (102) and threads (1024) are formed on the outer wall of the screw, a cavity (1022) is formed in the middle of the head (101) and in the middle of the screw (102) and close to the head (101), and at least one fixing groove (1011) is formed in the top end of the head (101); The silica gel plug (20), the silica gel plug (20) is arranged in the cavity (1022), a channel (210) is arranged in the middle of the silica gel plug (20), and a clamping groove (211) is further formed in the outer wall of the silica gel plug (20); A clamping member (30) disposed in the clamping groove (211) for applying inward contracting pressure to the silica gel plug (20); An electrode cap (40) is arranged on the head (101) and is used for being covered on the cavity (1022), the electrode cap (40) is provided with a fixing wing (41) matched with the fixing groove (1011), and the fixing wing (41) can clamp and fix an electrode when being installed on the fixing groove (1011).
  2. 2. The electrode fixing device according to claim 1, wherein a torus (50) is arranged above the silica gel plug (20) in the cavity (1022).
  3. 3. The electrode fixing device according to claim 2, characterized in that a boss (1023) is provided in the cavity (1022) for cooperation with the torus (50).
  4. 4. The electrode fixing device according to claim 1, wherein the channel (210) is a dumbbell-shaped hole, a cylindrical hole with a smooth inner wall, or a circular cylindrical hole with a screw thread on the inner wall.
  5. 5. The electrode fixing device according to claim 1, wherein the clamping member (30) is a canted coil spring.
  6. 6. The electrode fixing device according to claim 1, wherein two parallel clamping grooves (211) are further provided on the outer wall of the silicone plug (20), and each clamping groove (211) is provided with one clamping piece (30).
  7. 7. The electrode fixing device according to claim 1, wherein the screw (102) is formed with a thread (1024) that is self-tapping.
  8. 8. The electrode fixing device according to claim 1, wherein the fixing groove (1011) is further formed with an inclined surface (1012), and the side surface of the fixing wing (41) is provided with an inclined surface (46) which is matched with the inclined surface (1012) to form self-locking.
  9. 9. The electrode fixing device according to claim 1, wherein the fixing groove (1011) is symmetrically provided with a semicircular groove (1013) on both sides, and the fixing wing (41) is provided with a semicircular boss (42) which can be engaged in the semicircular groove (1013).

Description

Electrode fixing device Technical Field The application belongs to the technical field of medical appliances, and particularly relates to an electrode fixing device. Background Deep brain stimulation (Deep brain stimulation, DBS) is a widely used clinical neuromodulation method, which applies electrical stimulation to target nuclei through a neurostimulator, thereby achieving the effect of treating diseases, and has become a main surgical treatment means for dyskinesia diseases (such as parkinson's disease, dystonia, essential tremor and obstinate obsessive-compulsive disorder), and also is a potential treatment method for a plurality of neuropsychiatric diseases. In the implantation operation process, a doctor firstly determines the target position of the brain of the patient through the three-dimensional stereotactic device, the doctor opens a small hole on the proper skull part of the patient according to the target position, inserts the brain electrode into the brain target through the skull hole, and tests the implantation target by using a test stimulator, if the stimulation treatment effect is ideal, the brain electrode is reliably fixed on the skull by using the fixing device. With the development of deep brain electrical stimulation systems, medical staff hopes that the smaller the hole drilled on the skull, the better the smaller the height of the electrode fixing device, so that the trauma to a patient can be reduced, the risk of infection is reduced, and the postoperative healing speed is high. The prior art, such as the Chinese patent publication CN209333015U, discloses an intracranial electrode fixing seat, belongs to the technical field of implantable medical systems, and the Chinese patent publication CN110215605A discloses a brain electrode fixing device and a brain electrode fixing kit. Chinese patent CN108325072a discloses a medical instrument fixing device. In the three patent documents disclosed above, a hole with a diameter of 14mm is required to be drilled in the skull bone, and the brain electrode fixing device is required to protrude from the skull bone to a height of about 3.5-4mm. The fixing device of the above document has a large hole drilled in the skull and a high protruding height above the skull. Disclosure of utility model The utility model aims to solve the technical problem of providing an electrode fixing device with small diameter and low height for drilling holes above skull bone in order to solve the defects in the prior art. The technical scheme adopted for solving the technical problems is as follows: an electrode fixing device comprising: The bone nail comprises a head and a screw rod, wherein the middle of the screw rod is provided with a through hole, and threads are formed on the outer wall of the screw rod; The silica gel plug is arranged in the cavity, a channel is arranged in the middle of the silica gel plug, and a clamping groove is further formed in the outer wall of the silica gel plug; the clamping piece is arranged in the clamping groove and is used for applying inward contraction pressure to the silica gel plug; The electrode cap is arranged on the head and used for being covered on the cavity, the electrode cap is provided with a fixed wing matched with the fixed groove, and the fixed wing can clamp and fix the electrode when being installed on the fixed groove. Preferably, in the electrode fixing device of the utility model, a torus is arranged above the silica gel plug in the cavity. Preferably, in the electrode fixing device of the present utility model, a boss matched with the torus is arranged in the cavity. Preferably, the electrode fixing device of the present utility model, the channel is a dumbbell-shaped hole, a cylindrical hole with a smooth inner wall or a circular cylindrical hole with a thread on the inner wall. Preferably, in the electrode fixing device of the present utility model, the clamping member is a canted coil spring. Preferably, in the electrode fixing device of the present utility model, two parallel clamping grooves are further provided on the outer wall of the silica gel plug, and each clamping groove is provided with one clamping piece. Preferably, in the electrode fixing device of the present utility model, the screw thread formed by the screw is self-tapping. Preferably, in the electrode fixing device of the present utility model, an inclined plane is further formed on the fixing groove, and an inclined plane matching with the inclined plane to form self-locking is arranged on the side surface of the fixing wing. Preferably, in the electrode fixing device of the present utility model, semicircular grooves are symmetrically arranged on two sides of the fixing groove, and semicircular bosses capable of being clamped into the semicircular grooves are arranged on the fixing wings. The beneficial effects of the utility model are as follows: the electrode fixing device comprises the bone nail, the silica gel plug, the clamping