Percutaneous internal fixation stable connection taking-out structure

Abstract

The utility model is applicable to the technical field of medical instruments, and provides a percutaneous internal fixation stable connection taking-out structure which comprises an outer screwdriver assembly, an inner screwdriver assembly is installed in the outer screwdriver assembly, and a nut assembly is arranged at one end of the outer screwdriver assembly. The screwdriver is composed of the inner screwdriver body and the outer screwdriver body, the inner screwdriver body can stretch out and retract in the hollow channel of the outer screwdriver body, the foremost end of the inner screwdriver body is of a screw structure and can be stably connected with a nut structure corresponding to the inner fixing part, the effects of stable connection and falling-off prevention are achieved, and the outer screwdriver body is of an outer hexagonal or plum blossom or cross structure matched with the inner fixing part. The screw driver has the advantages of being simple in structure, convenient to use, capable of playing a role in stress when the internal fixation is screwed out, capable of effectively solving the problems that the screw driver and the internal fixation are difficult to stably connect when the internal fixation is taken out percutaneously and the screw driver and the internal fixation fall off in the taking-out process, capable of being operated only through a set of tiny openings and good in using effect.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical devices, and in particular relates to a percutaneous internal fixation stable connection and removal structure. Background Art

[0002] After orthopedic internal fixation is implanted, it maintains the stability of the patient's bones in the body and can be removed after the bones heal. During the removal process, corresponding removal instruments are required.

[0003] Currently, many internal fixators can be inserted through percutaneous minimally invasive methods. However, removal often requires a larger incision to allow the screwdriver to stably connect and remove the internal fixator, which violates the principles of minimally invasive surgery. Therefore, a percutaneous internal fixator with stable connection and removal structure is urgently needed to solve the above problem. Utility Model Content

[0004] The purpose of the present invention is to provide a percutaneous internal fixation stable connection and removal structure to solve the problem in the above-mentioned background technology that a larger incision is often required during removal so that the screwdriver can stably connect and remove the internal fixation, which violates the principles of minimally invasive surgery.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions:

[0006] The percutaneous internal fixation stable connection removal structure includes an external screwdriver assembly, an internal screwdriver assembly is installed in the external screwdriver assembly, a nut assembly is provided at one end of the external screwdriver assembly, and the external screwdriver assembly includes:

[0007] An outer screwdriver handle, wherein the outer screwdriver handle is a hollow structure, i.e., has a hollow channel to facilitate insertion of the inner screwdriver assembly;

[0008] An external screwdriver head, the external screwdriver head being fixedly connected to one end of the external screwdriver handle and having a hollow structure inside, and the external screwdriver head having an external hexagonal structure;

[0009] An external screwdriver handle is fixedly connected to an end of the external screwdriver stem away from the external screwdriver head and forms a T-shaped structure with the external screwdriver stem.

[0010] Furthermore, the inner screwdriver assembly includes:

[0011] An inner screwdriver handle, the inner screwdriver handle passing through the outer screwdriver handle, the outer screwdriver head, and the outer screwdriver handle;

[0012] The inner screwdriver head is fixedly connected to one end of the inner screwdriver handle and is a screw structure.

[0013] Furthermore, the inner screwdriver assembly further includes:

[0014] An inner screwdriver handle, the inner screwdriver handle being fixedly connected to an end of the inner screwdriver handle away from the inner screwdriver head;

[0015] The surface of the inner screwdriver handle is frosted and anti-slip.

[0016] Furthermore, the nut assembly includes:

[0017] A sleeve, wherein the sleeve is a cylindrical structure;

[0018] An inner hexagonal cavity is formed in the sleeve and forms a nut sleeve with the sleeve.

[0019] Furthermore, the nut assembly further includes:

[0020] The connecting cavity is formed in the sleeve and is a threaded cavity.

[0021] Furthermore, the hexagonal cavity corresponds to the specifications and shape of the outer screwdriver head, and the connecting cavity corresponds to the specifications of the inner screwdriver head.

[0022] Furthermore, the shapes of the hexagonal cavity and the external screwdriver head are not unique, so as to play a role in receiving force when unscrewing the internal fixation.

[0023] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0024] The screwdriver of the utility model is composed of an inner and outer part. The inner screwdriver can be extended and retracted in the hollow channel of the outer screwdriver. The front end of the inner screwdriver is a screw structure, which can be stably connected to the corresponding nut structure of the internal fixator, thereby playing a role in stabilizing the connection and preventing it from falling off. The outer screwdriver has an external hexagonal or plum blossom, cross or other structures that match the internal fixator, which plays a role in bearing force when screwing out the internal fixator. It can effectively solve the problem that the screwdriver and the internal fixator are difficult to be stably connected when the internal fixator is removed percutaneously, and the problem that the screwdriver and the internal fixator fall off during the removal process. At the same time, only a group of tiny openings are needed for operation, and the use effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the three-dimensional structure of the percutaneous internal fixation stable connection and removal structure provided by an embodiment of the utility model (when the internal screwdriver head is extended);

[0026] Figure 2 This is a schematic structural diagram of the percutaneous internal fixation stable connection and removal structure provided by an embodiment of the present invention (when the internal screwdriver head is retracted);

[0027] Figure 3 This is a schematic diagram of the internal structure of the external screwdriver handle in the percutaneous internal fixation stable connection removal structure provided by an embodiment of the present invention;

[0028] Figure 4 It is a schematic diagram of the internal structure of the sleeve in the percutaneous internal fixation stable connection and removal structure provided by an embodiment of the present utility model.

[0029] The reference numerals in the figures are:

[0030] 1. External screwdriver assembly; 101. External screwdriver handle; 102. External screwdriver head; 103. External screwdriver handle; 2. Internal screwdriver assembly; 201. Internal screwdriver handle; 202. Internal screwdriver handle; 203. Internal screwdriver head; 3. Nut assembly; 301. Sleeve; 302. Hexagonal socket; 302. Connecting cavity. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0032] like Figure 1-Figure 3 As shown, the percutaneous internal fixation stable connection removal structure includes an external screwdriver assembly 1, an internal screwdriver assembly 2 is installed in the external screwdriver assembly 1, a nut assembly 3 is provided at one end of the external screwdriver assembly 1, and the external screwdriver assembly 1 includes: an external screwdriver handle 101, the external screwdriver handle 101 has a hollow structure, that is, it has a hollow channel to facilitate the insertion of the internal screwdriver assembly 2; an external screwdriver head 102, the external screwdriver head 102 is fixed to one end of the external screwdriver handle 101 and has a hollow structure inside, and the external head is an external hexagonal structure; an external screwdriver handle 103, the external screwdriver handle 103 is fixed to the end of the external screwdriver handle 101 away from the external screwdriver head 102 and forms a T-shaped structure with the external screwdriver handle 101.

[0033] The specific operations are as follows:

[0034] The outer screwdriver handle 101 provides a through channel for the inner screwdriver handle 201 , and the outer screwdriver head 102 can match the inner hexagonal cavity 302 to play a force-bearing role when unscrewing the internal fixation. The outer screwdriver handle 103 facilitates applying external force to the outer screwdriver handle 101 .

[0035] like Figure 1 and Figure 3 As shown, as an embodiment, the inner screwdriver assembly 2 includes: an inner screwdriver handle 201, the inner screwdriver handle 201 passes through the outer screwdriver handle 101, the outer screwdriver head 102 and the outer screwdriver handle 103; an inner screwdriver head 203, the inner screwdriver head 203 is fixed to one end of the inner screwdriver handle 201 and is a screw structure; an inner screwdriver handle 202, the inner screwdriver handle 202 is fixed to the end of the inner screwdriver handle 201 away from the inner screwdriver head 203; the surface of the inner screwdriver handle 202 is frosted and anti-slip treated.

[0036] The specific operations are as follows:

[0037] The inner screwdriver handle 201 can be extended and retracted in the hollow channel inside the outer screwdriver handle 101. The front end of the inner screwdriver handle 201 is a screw structure, which can stably connect to the corresponding nut structure inside, thereby stabilizing the connection and preventing it from falling off. The inner screwdriver handle 202 is convenient for driving the inner screwdriver handle 201 to rotate so that it is combined with the connecting cavity 303.

[0038] like Figure 1 and Figure 4 As shown, as an embodiment: the nut assembly 3 includes: a sleeve 301, which is a cylindrical structure; an inner hexagonal cavity 302, which is formed in the sleeve 301 and forms a nut sleeve 301 with the sleeve 301, a connecting cavity 303, which is formed in the sleeve 301 and is a threaded cavity, the inner hexagonal cavity 302 corresponds to the specification and shape of the external screwdriver head 102, and the connecting cavity 303 corresponds to the specification of the internal screwdriver head 203. The shapes of the inner hexagonal cavity 302 and the external screwdriver head 102 are not unique, so as to play a force-bearing role when screwing out the internal fixation.

[0039] The specific operations are as follows:

[0040] The nut assembly 3 serves as an internal fixed connection structure and is reserved in the patient's body. When removed, the connection cavity 303 provides a connection space for the inner screwdriver head 203 , and the inner hexagonal cavity 302 provides a connection space for the outer screwdriver head 102 .

[0041] In summary, the working principle of the percutaneous internal fixation stable connection removal structure is to open a group of tiny through holes at the patient's removal site to expose the nut assembly 3, then rotate the inner screwdriver handle 201 clockwise through the inner screwdriver handle 202, so that the inner screwdriver head 203 is screwed into the connecting cavity 303 in the sleeve 301, then slide the outer screwdriver handle 101 forward, insert the outer screwdriver head 102 into the inner hexagonal cavity 302 in the sleeve 301, and then rotate the outer screwdriver handle 101 counterclockwise through the outer screwdriver handle 103, and the sleeve 301 rotates counterclockwise together. During the rotation process, since the inner screwdriver head 203 is a screw structure, it can stably connect to the corresponding nut structure of the internal fixation, play a role in stable connection and prevent falling off. At the same time, the outer screwdriver head 102 has a structure that matches the inner hexagonal cavity 302, which can play a force role when screwing out the internal fixation, and can effectively solve the problem of the screwdriver and the internal fixation being difficult to stably connect during percutaneous removal of the internal fixation, and the problem of the screwdriver and the internal fixation falling off during the removal process. In addition, only a set of tiny openings are needed for operation, and the use effect is good.

[0042] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. Percutaneous internal fixation stable connection removal structure, characterized in that: The invention comprises an outer screwdriver assembly, wherein an inner screwdriver assembly is installed in the outer screwdriver assembly, and a nut assembly is provided at one end of the outer screwdriver assembly. The outer screwdriver assembly comprises: An outer screwdriver handle, wherein the outer screwdriver handle is a hollow structure, i.e., has a hollow channel to facilitate insertion of the inner screwdriver assembly; An external screwdriver head, the external screwdriver head being fixedly connected to one end of the external screwdriver handle and having a hollow structure inside, and the external screwdriver head having an external hexagonal structure; An external screwdriver handle is fixedly connected to an end of the external screwdriver stem away from the external screwdriver head and forms a T-shaped structure with the external screwdriver stem.

2. The percutaneous internal fixation stable connection removal structure according to claim 1, characterized in that: The inner screwdriver assembly comprises: An inner screwdriver handle, the inner screwdriver handle passing through the outer screwdriver handle, the outer screwdriver head, and the outer screwdriver handle; The inner screwdriver head is fixedly connected to one end of the inner screwdriver handle and is a screw structure.

3. The percutaneous internal fixation stable connection removal structure according to claim 2, characterized in that: The inner screwdriver assembly further comprises: An inner screwdriver handle, the inner screwdriver handle being fixedly connected to an end of the inner screwdriver handle away from the inner screwdriver head; The surface of the inner screwdriver handle is frosted and anti-slip.

4. The percutaneous internal fixation stable connection removal structure according to claim 3, characterized in that: The nut assembly comprises: A sleeve, wherein the sleeve is a cylindrical structure; An inner hexagonal cavity is formed in the sleeve and forms a nut sleeve with the sleeve.

5. The percutaneous internal fixation stable connection removal structure according to claim 4, characterized in that: The nut assembly further comprises: The connecting cavity is formed in the sleeve and is a threaded cavity.

6. The percutaneous internal fixation stable connection removal structure according to claim 5, characterized in that: The inner hexagonal cavity corresponds to the specification and shape of the outer screwdriver head, and the connecting cavity corresponds to the specification of the inner screwdriver head.

7. The percutaneous internal fixation stable connection removal structure according to claim 6, characterized in that: The shapes of the inner hexagonal cavity and the outer screwdriver head are not unique, so as to play a role in receiving force when screwing out the internal fixation.

Images