CN106236244A - Skeleton fixing nail withdrawing device and skeleton fixing nail extraction system - Google Patents

Abstract

The invention provides a bone fixation nail removal device and a bone fixation nail removal system, wherein the bone fixation nail removal device is used to pull out the bone fixation nail nailed into the bone from the bone, and the bone fixation nail removal device includes: a tube body, the barrel has a cavity; a locking and pulling component, the locking and pulling component is slidingly arranged on the barrel along the axis direction of the cavity, and the locking and pulling component is used to lock the bone fixation nail and drive the bone fixation nail Move away from the bone. The invention solves the time-consuming and labor-intensive process of pulling out bone fixation nails nailed into human bones by orthopedic nail pullers in the prior art.

Description

Bone Screw Removal Device and Bone Screw Removal System

technical field

The invention relates to the technical field of medical devices, in particular to a bone fixation nail removal device and a bone fixation nail removal system.

Background technique

In the field of modern medicine, artificial joint replacement has appeared and been used for a long time. Artificial joint replacement mainly refers to the removal of lesions at the joint position of the human body through medical equipment and then implanting artificial joint prosthesis, so as to eliminate the pain and improve the patient's quality of life.

During artificial joint replacement, in order to better match the artificial joint prosthesis with the patient's own bones and improve the movement flexibility of the artificial joint prosthesis in the patient's body, it is usually necessary to perform osteotomy on the patient's bone with lesions , in the process of osteotomy, bone fixation nails need to be used to position and fix the patient's bones, and the bone fixation nails need to be pulled out after the artificial joint prosthesis is implanted.

In the existing artificial joint replacement, medical staff usually use orthopedic nail pullers to complete the nail pulling operation for bone fixation screws. The directions are all unstable, which is likely to cause the fracture of the patient and increase the pain of the patient.

Not only that, but the existing orthopedic nail pullers cannot effectively transmit the torque applied to the orthopedic nail pullers by the medical staff to the bone fixation nails, which makes it difficult to complete the nail puller operation smoothly and quickly, and thus Increased the time of operation and increased the risk of operation failure.

Contents of the invention

The main purpose of the present invention is to provide a bone fixation nail removal device and a bone fixation nail removal system to solve the problem of time-consuming and labor-intensive process of pulling out bone fixation nails nailed into human bones by orthopedic nail pullers in the prior art.

In order to achieve the above object, according to one aspect of the present invention, a bone fixation nail removal device is provided, which is used to pull out the bone fixation nail nailed into the bone from the bone, comprising: a cylinder, the cylinder has a cavity; The locking and pulling assembly is arranged on the cylinder body by sliding along the axial direction of the cavity, and the locking and pulling assembly is used for locking the bone fixing nail and driving the bone fixing nail to move away from the bone.

Further, the locking and pulling assembly includes: a sliding block, which is slidably arranged in the cavity, and a receiving hole is opened on the sliding block; a locking block, which is movably arranged on the sliding block, and locks The tight block has a locking position for locking the bone fixing nail and a loosening position for releasing the bone fixing nail.

Further, the locking block is set along the radial direction of the cavity and is divided into a connected locking section and a connecting section along the axis away from the cavity. The long hole is opened at the locking section, and when the locking block is at the locking position, the locking section is clamped on the outer wall of the bone fixing nail.

Further, the bone fixation screw removal device further includes an operation part, the first end of the operation part is hinged to the connecting section, and the second end of the operation part is used as the operation end.

Further, the bone fixation screw removal device further includes a support connector, the first end of the support connector is hinged to the barrel, and the second end of the support connector is hinged to the operating part.

Further, the operating part is a first operating handle.

Further, the bone fixation nail removal device further includes a second operating handle, which is fixedly connected to the barrel.

Further, the bone fixation nail removal device further includes a first elastic member, and the first elastic member is arranged between the first operating handle and the second operating handle.

Further, the bone fixation screw removal device further includes a second elastic member, the second elastic member is arranged at the second end of the cavity, and the second elastic member abuts against the end surface of the first end of the locking and pulling assembly away from the cavity. catch.

According to another aspect of the present invention, a bone fixation screw removal system is provided, which includes a bone fixation screw removal device, the bone fixation screw removal device is the aforementioned bone fixation screw removal device.

Applying the technical solution of the present invention, by setting the cylinder and the locking and pulling assembly, the locking and pulling assembly is slid on the cylinder along the axial direction of the cavity of the cylinder, and the locking and pulling assembly is used to fix the bone Lock and drive the bone fixation nail to move away from the bone.

In this way, when the medical staff pulls out the bone fixation nail nailed into the patient's bone, the force applied by the medical staff to the bone fixation screw removal device is stably and accurately transmitted to the bone fixation nail through the locking and pulling assembly. At the position, the locking and pulling assembly slides back and forth, thereby stably pulling the bone fixation nails and continuously moving away from the patient's bone, finally achieving the effect of pulling the bone fixation nails out of the patient's bones, which not only reduces the operation of pulling the nails Difficulty, reducing the operation time, improving the success rate of the nail pulling operation, and avoiding additional damage to the patient's bone.

Description of drawings

The accompanying drawings constituting a part of the present application are used to provide a further understanding of the present invention, and the schematic embodiments and descriptions of the present invention are used to explain the present invention, and do not constitute an improper limitation of the present invention. In the attached picture:

Fig. 1 shows a schematic diagram of the working state of a bone fixation nail removal system according to an optional embodiment of the present invention;

Fig. 2 shows the front view of the locking block of the bone fixation screw removal device of the bone fixation screw removal system in Fig. 1;

Fig. 3 shows a left partial sectional view of the locking block in Fig. 2 .

Wherein, the above-mentioned accompanying drawings include the following reference signs:

1. Bone; 2. Osteotomy plate; 3. Bone fixation screw; 4. Bone fixation screw removal device; 10. Cylinder; 11. Cavity; 20. Locking and pulling component; 21. Accommodating hole; 22. Sliding Shifting block; 23, locking block; 231, locking section; 232, connecting section; 233, long hole for avoidance; 30, operating part; 40, supporting connector; 50, second operating handle; 60, first elastic member ; 70, the second elastic member.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. The following description of at least one exemplary embodiment is merely illustrative in nature and in no way taken as limiting the invention, its application or uses. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and/or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and/or combinations thereof.

The relative arrangements of components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. At the same time, it should be understood that, for the convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. Techniques, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods and devices should be considered part of the Authorized Specification. In all examples shown and discussed herein, any specific values should be construed as exemplary only, and not as limitations. Therefore, other examples of the exemplary embodiment may have different values. It should be noted that like numbers and letters denote similar items in the following figures, therefore, once an item is defined in one figure, it does not require further discussion in subsequent figures.

In the description of the present invention, it should be understood that orientation words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" etc. indicate the orientation Or positional relationship is generally based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description. In the absence of a contrary description, these orientation words do not indicate or imply the device or element referred to. It must have a specific orientation or be constructed and operated in a specific orientation, so it should not be construed as limiting the protection scope of the present invention; the orientation words "inner and outer" refer to the inner and outer relative to the outline of each component itself.

For the convenience of description, spatially relative terms may be used here, such as "on ...", "over ...", "on the surface of ...", "above", etc., to describe the The spatial positional relationship between one device or feature shown and other devices or features. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, devices described as "above" or "above" other devices or configurations would then be oriented "beneath" or "above" the other devices or configurations. under other devices or configurations”. Thus, the exemplary term "above" can encompass both an orientation of "above" and "beneath". The device may be otherwise oriented (rotated 90 degrees or at other orientations, and the spatially relative descriptions used herein interpreted accordingly.

In addition, it should be noted that the use of words such as "first" and "second" to define components is only for the convenience of distinguishing corresponding components. To limit the protection scope of the present invention.

In order to solve the problem that the orthopedic nail puller in the prior art is time-consuming and labor-intensive in the process of pulling out bone fixation nails nailed into human bones, the present invention provides a bone fixation screw removal device 4 and a bone fixation screw removal system. The nail removal device 4 is a bone fixation screw removal device described below, and the bone fixation screw removal system includes the above-mentioned bone fixation screw removal device.

As shown in Figure 1, the bone fixation nail removal device 4 is used to pull out the bone fixation nail 3 nailed into the bone 1 from the bone 1, which includes a cylinder 10 and a locking and pulling assembly 20, the cylinder 10 has a cavity body 11, the locking and pulling assembly 20 is slidably arranged on the cylinder body 10 along the axial direction of the cavity 11, and the locking and pulling assembly 20 is used to lock the bone fixing nail 3 and drive the bone fixing nail 3 away from the bone 1 direction movement.

By setting the cylinder 10 and the locking and pulling assembly 20, the locking and pulling assembly 20 is slid on the cylinder 10 along the axial direction of the cavity 11 of the cylinder 10, and the locking and pulling assembly 20 is used to fix the bone 3 locks and drives the bone fixation nail 3 to move away from the bone 1.

In this way, when the medical staff pulls out the bone fixation nail 3 nailed into the patient's bone 1, the force applied by the medical staff to the bone fixation nail removal device 4 is transmitted stably and accurately through the locking and pulling assembly 20. To the bone fixation nail 3, the locking and pulling assembly 20 slides reciprocally, thereby stably pulling the bone fixation nail 3 and constantly moving away from the patient's bone 1, finally reaching the point where the bone fixation nail 3 is pulled out of the patient's bone 1 As a result, it not only reduces the operation difficulty of the nail pulling operation, reduces the operation time, improves the success rate of the nail pulling operation, but also avoids additional damage to the patient's bone 1 .

Specifically, the locking and pulling assembly 20 has a first working position close to the first end of the cavity 11 and a second working position away from the first end of the cavity 11, when the locking and pulling assembly 20 is operated by the first During the movement of the position to the second working position, the locking and pulling assembly 20 locks the bone fixing nail 3 in the receiving hole 21 and drives the bone fixing nail 3 to move so as to pull the bone fixing nail 3 out of the bone 1. During the movement of the locking and pulling assembly 20 from the second working position to the first working position, the locking and pulling assembly 20 and the bone fixation nail 3 are in a loose state. In this way, the locking and pulling assembly 20 can work continuously, so as to reliably pull out the bone fixation nail 3 from the patient's bone 1 .

As shown in Figure 1, the locking and pulling assembly 20 includes a sliding block 22 and a locking block 23, the sliding block 22 is slidably arranged in the cavity 11, and the sliding block 22 is provided with a receiving hole 21, and the locking block 23 It is movably arranged on the sliding block 22 , and the locking block 23 has a locking position for locking the bone fixation nail 3 and a release position for releasing the bone fixation nail 3 .

Optionally, in order to move the bone fixation nail 3 along the axial direction of the cavity 11 , the accommodating hole 21 is provided on the sliding block 22 along the axial direction of the cavity 11 ;

As shown in Figures 2 and 3, the locking block 23 is arranged radially along the cavity 11 and is divided into a connected locking segment 231 and a connecting segment 232 along the axis direction away from the cavity 11, and the locking block 23 also has The avoidance long hole 233 for avoiding the bone fixation nail 3, the avoidance long hole 233 is set at the locking section 231, when the locking block 23 is in the locked position, the locking section 231 is clamped on the outer wall surface of the bone fixation nail 3 place. In this way, the locking block 23 can effectively lock the bone fixation nail 3, ensuring that the bone fixation nail 3 and the sliding block 22 move together as a whole.

In an optional embodiment of the present invention, when the locking block 23 is in the locking position, the inner wall of the long avoidance hole 233 is clamped and connected with the bone fixation nail 3 .

As shown in FIG. 1 , the bone fixation screw removal device 4 further includes an operation part 30 , the first end of the operation part 30 is hinged to the connecting section 232 , and the second end of the operation part 30 is used as the operation end. In this way, when the medical staff uses the bone fixation nail removal device 4, they can easily pull the locking and pulling assembly 20 through the control operation part 30, and the locking and pulling assembly 20 drives the bone fixing nail 3 along the distance. The direction of the bone 1 is moved, so that the bone fixation nail 3 is pulled out of the patient's bone 1 .

By increasing the length of the operating part 30, the force arm of the medical staff can be effectively increased, thereby saving force.

It should be noted that the first end of the operating part 30 is hinged to the connecting section 232 through a pin.

In order to improve the connection stability between the operating part 30 and the barrel 10, the bone fixation nail removal device 4 also includes a support connector 40, the first end of the support connector 40 is hinged to the barrel 10, and the second end of the support connector 40 The end is hinged with the operating part 30.

Optionally, the support connector 40 is hinged to the cylinder body 10 and the operating part 30 through a pin.

Optionally, for the convenience of medical personnel to operate, the operating part 30 is a first operating handle.

As shown in FIG. 1 , the bone fixation nail removal device 4 further includes a second operating handle 50 , and the second operating handle 50 is fixedly connected with the cylinder body 10 . In this way, when the medical staff uses the bone fixation screw removal device 4 , the second operating handle 50 is used as a force application support point, thereby improving the convenience of use of the bone fixation screw removal device 4 .

As shown in FIG. 1 , the bone fixation nail removal device 4 further includes a first elastic member 60 , and the first elastic member 60 is disposed between the first operating handle and the second operating handle 50 . In this way, the first elastic member 60 provides a restoring force for the first operating handle.

Optionally, the first elastic member 60 is a return spring.

As shown in FIG. 1 , the bone fixation screw removal device 4 also includes a second elastic member 70 , the second elastic member 70 is arranged at the second end of the cavity 11 , and the distance between the second elastic member 70 and the locking puller assembly 20 is The end surface of the first end of the cavity 11 abuts against. In this way, the second elastic member 70 provides a restoring force for the locking and pulling assembly 20 , which facilitates the reset movement of the locking and pulling assembly 20 from the second working position to the first working position.

As shown in Figure 1, the bone fixation nail removal system also includes a bone 1, an osteotomy plate 2 and a bone fixation nail 3, the osteotomy plate 2 is arranged at one end of the bone 1, and the first end of the bone fixation nail 3 passes through the osteotomy plate 2 is nailed into the bone 1, and the other end of the bone fixation nail 3 protrudes from the osteotomy plate 2 and is connected with the bone fixation nail removal device 4.

Optionally, the bone fixation nail removal device 4 in the present invention is made of medical stainless steel.

From the above description, it can be seen that the above-mentioned embodiments of the present invention have achieved the following technical effects: the use of the bone fixation nail removal device of the present invention effectively improves the stability of taking out the bone fixation nails during the operation, and reduces the need for medical workers Labor force, less time for medical staff to perform surgery.

At the same time, the medical staff only need to insert the bone fixation nail into the bone fixation screw removal device, press the operating part, and then the bone fixation screw can be easily and stably taken out in a time-saving and labor-saving manner, which changes the traditional way of removing the nail and simplifies the operation steps.

It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and/or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and/or combinations thereof.

It should be noted that the terms "first" and "second" in the description and claims of the present application and the above drawings are used to distinguish similar objects, but not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein can be practiced in sequences other than those illustrated or described herein.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (11)

1. A device for taking out bone fixation nails, used to pull out the bone fixation nails (3) nailed into the bones (1) from the bones (1), characterized in that, comprising: a cylinder (10), the cylinder (10) has a cavity (11); A locking and pulling assembly (20), the locking and pulling assembly (20) is slidably arranged on the cylinder (10) along the axial direction of the cavity (11), and the locking and pulling assembly ( 20) Used to lock the bone fixation nail (3) and drive the bone fixation nail (3) to move away from the bone (1). 2. The device for taking out bone fixation nails according to claim 1, wherein the locking and pulling assembly (20) comprises: a sliding block (22), the sliding block (22) is slidably arranged in the cavity (11), and an accommodation hole (21) is opened on the sliding block (22); A locking block (23), the locking block (23) is movably arranged on the sliding block (22), and the locking block (23) has a function for locking the bone fixation nail (3 ) in the locked position and the loosened position in which the bone fixation nail (3) is released. 3. The bone fixation screw removal device according to claim 2, characterized in that, the locking block (23) is arranged radially along the cavity (11) and along a direction away from the cavity (11). The axial direction is divided into a connected locking section (231) and a connecting section (232), and the locking block (23) also has an avoidance long hole (233) for avoiding the bone fixation nail (3), so The avoidance long hole (233) is set at the locking section (231), and when the locking block (23) is in the locking position, the locking section (231) is clamped on the bone at the outer wall of the fixing nail (3). 4. The bone fixation nail removal device according to claim 3, characterized in that, the bone fixation nail removal device (4) also comprises an operating part (30), the first end of the operating part (30) is connected to the The connecting section (232) is hinged, and the second end of the operating part (30) is used as the operating end. 5. The bone fixation screw removal device according to claim 4, characterized in that, the bone fixation screw removal device (4) also includes a support connector (40), the first end of the support connector (40) It is hinged with the barrel (10), and the second end of the support connector (40) is hinged with the operating part (30). 6. The device for removing bone fixation nails according to claim 5, characterized in that the operating part (30) is a first operating handle. 7. The bone fixation nail removal device according to claim 6, characterized in that, the bone fixation nail removal device (4) also includes a second operating handle (50), and the second operating handle (50) is connected to the The cylinder (10) is fixedly connected. 8. The bone fixation screw removal device according to claim 7, characterized in that, the bone fixation screw removal device (4) also includes a first elastic member (60), and the first elastic member (60) is arranged on between the first operating handle and the second operating handle (50). 9. The bone fixation screw removal device according to claim 1, characterized in that, the bone fixation screw removal device (4) also includes a second elastic member (70), and the second elastic member (70) is arranged on The second end of the cavity (11), and the second elastic member (70) abuts against the end surface of the first end of the locking and pulling component (20) away from the cavity (11) . 10. A bone fixation screw removal system, comprising a bone fixation screw removal device, characterized in that the bone fixation screw removal device is the bone fixation screw removal device according to any one of claims 1 to 9. 11. The bone fixation screw removal system according to claim 10, characterized in that, the bone fixation screw removal system also includes a bone (1), an osteotomy plate (2) and a bone fixation screw (3), the bone fixation screw (3) The bone plate (2) is arranged at one end of the bone (1), the first end of the bone fixation nail (3) is nailed into the bone (1) through the osteotomy plate (2), and the The other end of the bone fixation nail (3) protrudes from the osteotomy plate (2) and is connected with the bone fixation nail removal device (4).