Spinal cord half-cutting positioning device with dura mater protection function

Abstract

The utility model discloses a spinal cord semi-cutting positioning device with a dura mater protection function, which comprises a semi-cutting positioning structure and a dura mater protection sheet, and is characterized in that the semi-cutting positioning structure comprises a mounting frame, a lifting driving module mounted on the mounting frame and a positioning guide pin mounted below a telescopic rod of the lifting driving module; the lifting driving module drives the positioning guide pin to lift; the dura mater protection sheet is in a lifting hook shape, an inner hook section and an outer arm section integrally connected with the inner hook section are formed, a depressed position of the inner hook section is a marrow containing groove so that the dura mater can be cut open, the dura mater protection sheet enables the inner hook section to stretch into an incision, after the spinal cord is placed in the marrow containing groove, the lifting driving module drives the positioning guide needle to descend, and then the dura mater is cut. The positioning guide needle is inserted into a central shaft of the spinal cord until the positioning guide needle abuts against the marrow containing groove. When the positioning guide needle punctures the spinal cord and the scalpel cuts down along the positioning guide needle, the dura mater can be protected by the dura mater protection sheet.

Description

TECHNICAL FIELD

[0001] The utility model relates to non-human primates spinal cord injury model manufacturing equipment technical field, especially a kind of spinal cord hemisection positioning device with dura mater protection function. BACKGROUND

[0002] In medical experiment for researching certain specific disease, it is extremely important to collect research data through experimental animal, such as research on spinal cord injury. For spinal cord injury, more suitable experimental animal is monkey, wherein, it is a crucial link to make animal spinal cord injury model through monkey for researching mechanism of spinal cord injury and its treatment method.

[0003] At present, there are mainly following animal spinal cord injury models: including hemostatic forceps clamp method spinal cord crush injury model, heavy weight falling method spinal cord impact injury model, spinal cord transection injury model, spinal cord hemisection injury model, balloon extrusion injury model and the like.

[0004] Among them, the existing spinal cord hemisection injury model is usually made by artificial way, after cutting open dura mater, positioning needle is inserted into the central axis of spinal cord manually, and the dura mater after spinal cord is pierced and hemisection positioning is realized by feeling with hand without damaging the dura mater; subsequently, surgical knife is cut down along positioning needle, and spinal cord is hemisectioned, but compared with insertion of positioning needle, it is difficult to grasp the feeling of cutting down of surgical knife, once the depth of cutting is not accurate, it is easy to damage the dura mater area after cutting open spinal cord, so that after hemisection of spinal cord, dura mater cannot be sutured, thereby forming serious cerebrospinal fluid leakage, and finally affecting healing of incision and whether modeling is successful or not. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a kind of spinal cord hemisection positioning device with dura mater protection function.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0007] A kind of spinal cord hemisection positioning device with dura mater protection function, including hemisection positioning structure and dura mater protection piece, the hemisection positioning structure includes mounting bracket, lifting drive module installed on mounting bracket and positioning guide needle below telescopic rod of lifting drive module, positioning guide needle is lifted by lifting drive module;The dura mater protection piece is like a hook, and is formed with inner hook section and outer arm section integrally connected with inner hook section, the recess of inner hook section is the marrow containing groove, for cutting open dura mater, after dura mater protection piece extends into incision and makes spinal cord be placed in marrow containing groove, lifting drive module drives positioning guide needle to descend, positioning guide needle is inserted into the central axis of spinal cord, until it touches marrow containing groove, so that dura mater is protected by dura mater protection piece when positioning guide needle pierces spinal cord and surgical knife is cut down along positioning guide needle.

[0008] As a further technical scheme of the present application: the spinal cord half-cut positioning device, comprising a positioning clamp, the positioning clamp is formed with a elastic buckle part which can be detachably buckled to the end of the telescopic rod of the lifting driving module, and two positioning arc arms which are integrally connected on both sides of the elastic buckle part, the inner hook section of the dura mater protection sheet is inserted into the incision, and the spinal cord is placed in the marrow groove, then the positioning clamp is installed into the end of the telescopic rod of the lifting driving module through the elastic buckle part, and the ends of the two positioning arc arms clamp and position the outer arm section.

[0009] As a further technical scheme of the present application: the positioning guide needle is a straight needle, which is formed with a needle body, a needle tip integrally connected to the front end of the needle body, and a needle handle integrally connected to the tail end of the needle body.

[0010] As a further technical scheme of the present application: the cross sections of the needle body and the needle tip are both in the shape of a crescent moon, and the inner sides of the needle body and the needle tip are through to form a guide knife groove.

[0011] As a further technical scheme of the present application: the lifting driving module is provided with a fixing part for inserting and installing the positioning guide needle at the tail of the telescopic rod, and the fixing part is provided with a pressure sensor inside.

[0012] As a further technical scheme of the present application: the tip of the positioning guide needle is round and blunt.

[0013] Compared with the prior art, the present application has the following advantages: the spinal cord half-cut positioning device with dura mater protection function can protect the dura mater from being damaged when the positioning guide needle pierces the spinal cord and the scalpel cuts along the positioning guide needle, through the cooperation between the half-cut positioning structure and the dura mater protection sheet. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the overall view of the spinal cord half-cut positioning device with dura mater protection function.

[0015] Figure 2 It is the principle view of the spinal cord half-cut positioning device with dura mater protection function.

[0016] Figure 3 It is the schematic view of the positioning clamp.

[0017] Figure 4 It is the sectional view of the positioning guide needle. DETAILED DESCRIPTION

[0018] The specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present application, and are not used to limit the protection scope of the present application.

[0019] Please refer to Figure 1 , Figure 2 The spinal cord hemisection positioning device with dura mater protection function comprises a hemisection positioning structure 10 and a dura mater protection sheet 20. The hemisection positioning structure 10 comprises a mounting frame 11, a lifting driving module 12 mounted on the mounting frame 11, and a positioning guide needle 13 mounted below the telescopic rod of the lifting driving module 12, so that the positioning guide needle 13 is driven to lift by the lifting driving module 12. The dura mater protection sheet 20 is in the shape of a hook, and is formed with an inner hook section 21 and an outer arm section 22 integrally connected with the inner hook section 21. The recess of the inner hook section 21 is a spinal cord accommodating groove 211 for dura mater incision. After the inner hook section 21 of the dura mater protection sheet 20 is inserted into the incision and the spinal cord is placed in the spinal cord accommodating groove 211, the positioning guide needle 13 is lowered by the lifting driving module 12, and the central axis of the spinal cord is inserted by the positioning guide needle 13 until it touches the spinal cord accommodating groove 211. Therefore, when the spinal cord is pierced by the positioning guide needle 13 and the scalpel is cut along the positioning guide needle 13, the dura mater is protected by the dura mater protection sheet 20 to prevent damage to the dura mater.

[0020] Further, in the embodiment, the positioning guide needle 13 is a straight needle, which is formed with a needle body, a needle tip integrally connected to the front end of the needle body, and a needle handle integrally connected to the tail end of the needle body.

[0021] Further, in the embodiment, in combination with reference to Figure 4 , the cross sections of the needle body and the needle tip are both in the shape of a crescent moon, and a guide knife groove 131 is formed through the inner side of the needle body and the needle tip to enable the scalpel to slide downward from the front end of the needle body along the guide knife groove 131, ensuring that the spinal cord is hemisectioned without deviation of the knife track.

[0022] Further, in the embodiment, the lifting driving module 12 is provided at the tail of the telescopic rod with a fixing piece 121 for inserting and fixing the positioning guide needle 13. A pressure sensor is arranged in the fixing piece 121 to sense the pressure received by the positioning guide needle 13. After the positioning guide needle 13 pierces the spinal cord and touches the spinal cord accommodating groove 211, the pressure sensor transmits a signal to the lifting driving module 12 to stop driving.

[0023] Further, in the embodiment, the needle tip of the positioning guide needle 13 is round and blunt to avoid damage caused by touching the spinal cord accommodating groove 211 after the spinal cord is hemisectioned.

[0024] Further, in the embodiment, in combination with reference to Figure 3The spinal cord half-cut positioning device comprises a positioning clasp 30, the positioning clasp 30 is formed with a elastic buckle part 31 which is detachably buckled to the end of the telescopic rod of the lifting driving module 12 and two positioning arc arms 32 which are integrally connected on the two sides of the elastic buckle part 31, and after the inner hook section 21 of the dura mater protection sheet 20 is inserted into the incision and the spinal cord is placed in the marrow containing groove 211, the positioning clasp 30 is buckled to the end of the telescopic rod of the lifting driving module 12 with the elastic buckle part 31, and the ends of the two positioning arc arms 32 clamp and position the outer arm section 22.

[0025] It can be understood that the use method of the spinal cord half-cut positioning device with the dura mater protection function comprises the following steps: first, the spinal cord half-cut positioning device is used in cooperation with the action limiting device, the monkey is fixed through the action limiting device, the mounting frame 11 is erected above the monkey, the dura mater in front is cut manually, and the lifting driving module 12 is located above the incision in correspondence; then the inner hook section 21 of the dura mater protection sheet 20 is inserted into the incision and is placed between the spinal cord and the dura mater in back; second, according to the requirement, it is selected whether the positioning clasp 30 is installed, the positioning clasp 30 can be buckled to the end of the telescopic rod of the lifting driving module 12 with the elastic buckle part 31, and the ends of the two positioning arc arms 32 clamp and position the outer arm section 22; third, the positioning guide needle 13 is lowered by the lifting driving module 12, the needle tip of the positioning guide needle 13 and the tail end of the needle body are inserted into the central axis of the spinal cord, and the lifting driving module 12 stops driving until the positioning guide needle 13 touches the marrow containing groove 211; fourth, the surgical knife slides down from the head end of the needle body along the guide knife groove 131, and the spinal cord is half-cut. In this way, the dura mater is protected by the dura mater protection sheet 20 when the spinal cord is pierced by the positioning guide needle 13 and the surgical knife is cut along the positioning guide needle 13, and the dura mater is prevented from being damaged.

[0026] In summary, the spinal cord half-cut positioning device with the dura mater protection function can protect the dura mater by the dura mater protection sheet 20 when the spinal cord is pierced by the positioning guide needle 13 and the surgical knife is cut along the positioning guide needle 13 through the cooperation between the half-cut positioning structure 10 and the dura mater protection sheet 20.

[0027] As long as the various different embodiments of the utility model are combined without violating the creative thought of the utility model, the utility model should be regarded as the disclosed content; within the technical concept of the utility model, the various simple modifications of the technical scheme and the arbitrary combination of different embodiments without violating the creative thought of the utility model should be within the protection scope of the utility model.

Claims

1. A spinal cord resection positioning device with dura mater protection function, characterized in that: The device includes a semi-cut positioning structure (10) and a dura mater protection sheet (20). The semi-cut positioning structure (10) includes a mounting frame (11), a lifting drive module (12) mounted on the mounting frame (11), and a positioning guide pin (13) mounted below the telescopic rod of the lifting drive module (12), so that the lifting drive module (12) drives the positioning guide pin (13) to rise and fall. The dura mater protection sheet (20) is hook-shaped, forming an inner hook section (21) and an outer arm section (22) integrally connected to the inner hook section (21). The depression of the inner hook segment (21) is called the medullary groove (211) for the dura mater to be cut. The dura mater protector (20) inserts the inner hook segment (21) into the incision, so that the spinal cord is placed in the medullary groove (211). Then, the lifting drive module (12) drives the positioning guide needle (13) to descend, so that the positioning guide needle (13) is inserted into the central axis of the spinal cord until it touches the medullary groove (211). Thus, when the positioning guide needle (13) punctures the spinal cord and the scalpel cuts along the positioning guide needle (13), the dura mater protector (20) protects the dura mater.

2. The spinal cord resection positioning device with dura mater protection function according to claim 1, characterized in that: The device includes a positioning clip (30), which has a spring-loaded part (31) that is detachably fastened to the end of the telescopic rod of the lifting drive module (12) and two positioning arc arms (32) integrally connected to both sides of the spring-loaded part (31). The dura mater protector (20) inserts the inner hook segment (21) into the incision and places the spinal cord in the medullary groove (211). Then, the positioning clip (30) is inserted into the end of the telescopic rod of the lifting drive module (12) with the spring-loaded part (31). The ends of the two positioning arc arms (32) clamp and position the outer arm segment (22).

3. The spinal cord resection positioning device with dura mater protection function according to claim 1, characterized in that: The positioning guide needle (13) is a straight needle, which has a needle body, a needle tip integrally connected to the head end of the needle body, and a needle handle integrally connected to the tail end of the needle body.

4. The spinal cord resection positioning device with dura mater protection function according to claim 3, characterized in that: The cross-sections of both the needle body and the needle tip are crescent-shaped, and a guide groove (131) is formed by the inner sides of the needle body and the needle tip penetrating each other.

5. The spinal cord resection positioning device with dura mater protection function according to claim 1, characterized in that: The lifting drive module (12) has a fixing part (121) installed at the tail of its telescopic rod for the positioning guide pin (13) to be inserted. The fixing part (121) has a pressure sensor inside it.

6. The spinal cord resection positioning device with dura mater protection function according to claim 3, characterized in that: The tip of the positioning guide (13) is blunt.

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