Fixable neuroendoscope sheath

Abstract

The utility model relates to the technical field of neuro-endoscope sheathing canals, in particular to a fixable neuro-endoscope sheath which comprises a fixing cylinder and a sheathing canal, the fixing cylinder comprises an upper cylinder and a lower cylinder, internal threads are arranged on the inner wall of the upper cylinder, external threads are arranged on the outer wall of the sheathing canal, the sheathing canal is connected with the upper cylinder through the threads, and the inner diameter of the lower cylinder is larger than that of the upper cylinder. A plurality of notches are formed in the cylinder wall of the lower cylinder, the notches are formed upwards from the lower end face of the lower cylinder, so that a plurality of elastic supporting legs are formed in the lower cylinder, the elastic supporting legs are used for being supported on the inner wall of the formed bone window so as to fix the fixing cylinder, limiting parts are fixedly arranged on the outer walls of the elastic supporting legs, and the limiting parts are used for limiting the depth of the elastic supporting legs inserted into the bone window. The fixing cylinder and the sheathing canal are designed in a matched mode, the sheathing canal is connected with the fixing cylinder in a threaded mode after being inserted into the fixing cylinder, the depth of the sheathing canal is convenient and accurate to adjust, and the sheathing canal cannot deviate or fall into the cranium under the condition that the fixing cylinder is fixed.

Description

Technical Field

[0001] This utility model relates to the field of neuroendoscopic sheath technology, specifically to a neuroendoscopic sheath that can fix the neuroendoscopic sheath. Background Technology

[0002] When performing craniocerebral surgery using neuroendoscopy, the sheath is first inserted into the lesion in the brain tissue, and then the neuroendoscope is placed into the lesion along the sheath to perform the corresponding surgical procedures. During the operation, it is necessary to ensure the stability of the sheath. Currently, there are two main methods for fixing the sheath: one is to use a special fixation device; the other is to use an external metal stent.

[0003] Chinese utility model patent CN215777986U discloses a neuroendoscopic sheath fixation device, comprising a hollow cylindrical body, a clamping cap, a sheath clamping component, a clamping element, and multiple elastic legs evenly distributed circumferentially along the inner wall of the body. This neuroendoscopic sheath fixation device clamps the skull plate from both the inner and outer sides of the skull foramen through the bent portions of the elastic legs and the clamping cap, while simultaneously clamping the sides of the skull plate with the elastic legs, thus fixing it at the skull foramen. The hollow structure allows the neuroendoscopic sheath to pass through and through the skull foramen; the sheath clamping component and clamping element then fix the neuroendoscopic sheath in place. This neuroendoscopic sheath fixation device uses a clamping element to fix the sheath to the sheath clamping component. When it is necessary to adjust the depth of the sheath into the skull, the sheath needs to be held by hand and the clamping element needs to be rotated to complete the position adjustment of the sheath. The operation is inconvenient, the adjustment accuracy is not high, and if the clamping element is loose, the sheath may fall into the skull, causing damage to the brain tissue. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a fixation device for neuroendoscopic sheaths. This device features a matching design between the fixation tube and the sheath, with internal threads on the inner wall of the fixation tube and external threads on the outer wall of the sheath. After the sheath is inserted into the fixation tube, it is connected to the fixation tube via threads. The depth of the sheath can be adjusted conveniently and accurately, and the sheath will not shift or fall into the cranium when the fixation tube is securely fixed, thus ensuring the accuracy and safety of the surgical procedure.

[0005] To address the aforementioned technical problems, this utility model provides a fixable neuroendoscopic sheath, comprising a fixation cylinder and a sheath tube. The fixation cylinder includes an upper cylinder and a lower cylinder. The inner wall of the upper cylinder is provided with internal threads, and the outer wall of the sheath tube is provided with external threads. The sheath tube and the upper cylinder are connected by threads. The inner diameter of the lower cylinder is larger than that of the upper cylinder. Multiple notches are formed on the wall of the lower cylinder, with the notches opening upwards from the lower end of the lower cylinder, thus forming multiple elastic legs. The elastic legs are used to support the inner wall of the bone window to fix the fixation cylinder. A limiting part is fixedly provided on the outer wall of the elastic legs to limit the depth of insertion of the elastic legs into the bone window.

[0006] In some embodiments, the length of the portion of the elastic support leg below the limiting portion is no more than 0.7 cm.

[0007] Furthermore, the length of the portion of the elastic support leg below the limiting part is 0.5 to 0.7 cm.

[0008] In some embodiments, a friction portion is provided on the outer wall of the elastic outrigger, the friction portion being used to increase the friction between the elastic outrigger and the inner wall of the bone window.

[0009] Furthermore, one end of the friction part is fixedly connected to the elastic support leg, and the other end of the friction part extends upward at an angle.

[0010] Optionally, the end face of the friction part away from the elastic support leg has an arc-shaped strip structure.

[0011] Optionally, the friction part has an arc-shaped strip structure.

[0012] Optionally, the friction part is columnar.

[0013] In some embodiments, the elastic outriggers are provided in multiple groups, each group including two symmetrically arranged elastic outriggers.

[0014] Furthermore, the length of each set of flexible support legs is different.

[0015] The beneficial effects of the utility model are:

[0016] 1. This utility model features a matching design of a fixation cylinder and a sheath. The inner wall of the fixation cylinder has internal threads, and the outer wall of the sheath has external threads. After the sheath is inserted into the fixation cylinder, it is connected to the fixation cylinder via threads. The depth of the sheath can be adjusted conveniently and accurately. Furthermore, when the fixation cylinder is fixed in place, the sheath will not shift or fall into the cranium, ensuring the accuracy and safety of the surgical procedure. By setting multiple elastic legs and setting limiting parts on the elastic legs, the lower part of the fixation cylinder can be supported on the inner wall of the bone window, and the insertion depth of the fixation cylinder can be prevented from being too deep or falling into the cranium and damaging brain tissue.

[0017] 2. The length of the elastic outrigger below the limiting part of this utility model is 0.5 to 0.7 cm, so that the lower end of the elastic outrigger will not extend into the skull or will extend into the skull only slightly, thus avoiding damage to brain tissue by the fixation tube and ensuring the stability of the fixation tube.

[0018] 3. This utility model provides a friction part on the outer wall of the elastic outrigger. The friction part is arranged at an upward angle. The friction part does not affect the insertion of the lower tube into the bone window. Moreover, relative to the smooth outer wall of the elastic outrigger, the friction part can increase the friction between the elastic outrigger and the bone window, making it difficult for the fixation tube to be pulled out, and further improving the stability of the fixation tube.

[0019] 4. This utility model has multiple sets of elastic support legs, each with a different length, which makes it easy to insert the fixation tube into the bone window. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the fixable neuroendoscopic sheath in Embodiment 1 of this utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the fixed cylinder in Embodiment 1 of this utility model;

[0022] Figure 3 This is a schematic diagram of the usage state of the fixable neuroendoscopic sheath in Embodiment 1 of this utility model;

[0023] Figure 4 This is a schematic diagram of the structure of the fixed cylinder in Embodiment 2 of this utility model;

[0024] Figure 5 This is a schematic diagram of the structure of the fixed cylinder in Embodiment 3 of this utility model.

[0025] Reference numerals: sheath 1; fixing tube 2; upper tube 21; lower tube 22; elastic support leg 23; notch 24; limiting part 25; friction part 26; skull 3; bone window 4. Detailed Implementation

[0026] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0027] Example 1

[0028] like Figure 1As shown, this embodiment provides a fixation sheath for a neuroendoscopy, including a fixation cylinder 2 and a sheath tube 1. The fixation cylinder 2 includes an integrally formed upper cylinder 21 and a lower cylinder 22. The upper cylinder 21 has a uniform diameter structure, and its inner wall is provided with internal threads. The outer wall of the sheath tube 1 is provided with external threads. The sheath tube 1 and the upper cylinder 21 are connected by threads. Figure 1 The external thread of the sheath tube 1 is not shown. The external thread of the sheath tube 1 can be set from the upper end to the lower end of the sheath tube 1, or it can be set partially. The inner diameter of the lower cylinder 22 is larger than the inner diameter of the upper cylinder 21. The lower cylinder 22 includes an upper variable diameter structure and a lower constant diameter structure. The diameter of the variable diameter structure gradually increases from top to bottom.

[0029] like Figure 2 As shown, multiple notches 24 are opened on the wall of the lower cylinder 22. The notches 24 are opened from the lower end face of the lower cylinder 22 upward, so that the lower cylinder 22 forms multiple elastic legs 23. The elastic legs 23 are used to support the inner wall of the bone window 4 to fix the fixed cylinder 2. A limiting part 25 is fixedly provided on the outer wall of the elastic legs 23. The limiting part 25 is used to limit the depth of the elastic legs 23 inserted into the bone window 4.

[0030] In this embodiment, four elastic legs 23 are evenly arranged, and each elastic leg 23 is provided with a limiting part 25. The limiting part 25 on each elastic leg 23 is at the same height, and the limiting part 25 is perpendicular to the elastic leg 23 and integrally formed with the elastic leg 23.

[0031] In this embodiment, the length of the portion of the elastic support leg 23 below the limiting portion 25 is no greater than 0.7 cm, such as... Figure 3 As shown. The length of the portion of the elastic outrigger 23 below the limiting part 25 can be set to 0.5 to 0.7 cm, so that the lower end of the elastic outrigger will not extend into the skull or will extend into the skull only slightly, thus avoiding damage to brain tissue by the fixation tube and ensuring the stability of the fixation tube.

[0032] In this embodiment, the fixation tube 2 and the sheath tube 1 are made of the same material, both being transparent rigid plastic (such as polypropylene, polyethylene, etc.). The elastic support leg 23 has a certain deformation capacity, thereby adapting to the size deviation of the milled bone window 4. Both the fixation tube 2 and the sheath tube 1 can be sterilized and reused multiple times.

[0033] The method of using this fixable neuroendoscopic sheath is as follows:

[0034] During the surgery, after successful anesthesia, a bone window 4 is created using an electric drill and milling cutter. The fixable neuroendoscopic sheath can then be fixed to the skull 3. The specific fixation method is as follows: Figure 1As shown, before installation, the fixation tube 2 and the sheath tube 1 can be installed together or separately. During installation, press the elastic support leg 23 radially along the fixation tube 2 with your fingers, causing the elastic support leg 23 to slightly contract and deform. After inserting the lower end of the fixation tube 2 into the bone window 4, press down and rotate the fixation tube 2 until the limiting part 25 fits against the skull 3. Figure 3 As shown, Figure 3 The threads shown are for illustrative purposes only and do not represent the range of thread arrangement. If the fixed cylinder 2 and the sheath tube 1 are pre-installed together, the insertion depth of the sheath tube 1 can be adjusted by simply rotating the sheath tube 1. If the fixed cylinder 2 and the sheath tube 1 are installed separately, the sheath tube 1 can be screwed into the fixed cylinder 2 through the threads, and then the insertion depth of the sheath tube 1 can be adjusted.

[0035] Example 2

[0036] The difference between Embodiment 2 and Embodiment 1 lies only in the structure of the elastic support leg 23. For example... Figure 4 As shown, in this embodiment, two sets of elastic support legs 23 are provided, each set including two symmetrically arranged elastic support legs 23. The lengths of the elastic support legs 23 in each set are different, with one set of elastic support legs 23 being half the length of the other set. Since the fixing cylinder 2 and the sheath 1 are made of the same material, if a large number of elastic support legs 23 are arranged, it is inconvenient to press multiple elastic support legs 23 simultaneously when installing the fixing cylinder 2. In this embodiment, by setting the two sets of elastic support legs 23 to different lengths, during installation, the longer set of elastic support legs 23 can be pressed radially first, so that the longer set of elastic support legs 23 is inserted into the bone window 4, and then the shorter set of elastic support legs 23 can be pressed radially, so that the shorter set of elastic support legs 23 is inserted into the bone window 4, thus completing the installation of all elastic support legs 23.

[0037] In addition, the stability of the fixed cylinder 2 can also be ensured by arranging the limiting part 25 only on a longer set of elastic legs 23.

[0038] Example 3

[0039] Compared to Embodiment 1, Embodiment 3 differs only in the structure of the elastic support leg 23. For example... Figure 5 As shown, in this embodiment, a friction part 26 is provided on the outer wall of the elastic support leg 23. The friction part 26 is used to increase the friction between the elastic support leg 23 and the inner wall of the bone window 4, making the fixation cylinder 2 less likely to be pulled out, and further improving the stability of the fixation cylinder 2.

[0040] In this embodiment, one end of the friction part 26 is fixedly connected to the elastic support leg 23, and the other end of the friction part 26 extends upward at an angle. The end face of the friction part 26 away from the elastic support leg 23 has an arc-shaped strip structure.

[0041] The friction part 26 can be configured as an arc-shaped strip structure or a column. When the friction part 26 is configured as an arc-shaped strip structure, the length direction of the friction part 26 is parallel to the outer arc surface of the elastic support leg 23, and multiple friction parts 26 are arranged along the axial direction of the fixed cylinder 2. When the friction part 26 is configured as a column, multiple friction parts 26 are evenly arranged on the outer wall of the elastic support leg 23. The friction part 26 can be made of silicone or the same material as the fixed cylinder 2.

[0042] The existing fixation devices have complex structures, and there are still certain difficulties in transforming them into clinical products and promoting their use (such as production costs and ease of use). The fixable neuroendoscopic sheath of this utility model has a simple structure compared to the existing technology, with only two structures: a fixation cylinder and a sheath tube. The fixation cylinder and the sheath tube can be designed and manufactured as a complete set of products.

[0043] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included in the scope of protection of the present application.

Claims

1. A sheath for fixing a neuroendoscopic lens, characterized in that: The device includes a fixing cylinder (2) and a sheath (1). The fixing cylinder (2) includes an upper cylinder (21) and a lower cylinder (22). The inner wall of the upper cylinder (21) is provided with an internal thread, and the outer wall of the sheath (1) is provided with an external thread. The sheath (1) is connected to the upper cylinder (21) by a thread. The inner diameter of the lower cylinder (22) is larger than the inner diameter of the upper cylinder (21). Multiple notches (24) are opened on the cylinder wall of the lower cylinder (22). The notches (24) are opened from the lower end face of the lower cylinder (22) upward, so that the lower cylinder (22) forms multiple elastic legs (23). The elastic legs (23) are used to support the inner wall of the bone window (4) to fix the fixing cylinder (2). A limiting part (25) is fixedly provided on the outer wall of the elastic leg (23). The limiting part (25) is used to limit the depth of the elastic leg (23) inserted into the bone window (4).

2. The fixable neuroendoscopic sheath according to claim 1, characterized in that: The length of the portion of the elastic support leg (23) below the limiting part (25) is no more than 0.7 cm.

3. The fixable neuroendoscopic sheath according to claim 2, characterized in that: The length of the portion of the elastic support leg (23) below the limiting part (25) is 0.5 to 0.7 cm.

4. The fixable neuroendoscopic sheath according to any one of claims 1 to 3, characterized in that: The outer wall of the elastic support leg (23) is provided with a friction part (26), which is used to increase the friction between the elastic support leg (23) and the inner wall of the bone window (4).

5. The fixable neuroendoscopic sheath according to claim 4, characterized in that: One end of the friction part (26) is fixedly connected to the elastic support leg (23), and the other end of the friction part (26) extends upward at an angle.

6. The fixable neuroendoscopic sheath according to claim 5, characterized in that: The end face of the friction part (26) away from the elastic support leg (23) has an arc-shaped strip structure.

7. The fixable neuroendoscopic sheath according to claim 5, characterized in that: The friction part (26) has an arc-shaped strip structure.

8. The fixable neuroendoscopic sheath according to claim 5, characterized in that: The friction part (26) is columnar.

9. The fixable neuroendoscopic sheath according to any one of claims 1 to 3, characterized in that: The elastic outriggers (23) are provided in multiple sets, each set including two symmetrically arranged elastic outriggers (23).

10. The fixable neuroendoscopic sheath according to claim 9, characterized in that: The length of each set of elastic support legs (23) is different.

Images