CN108451675B - A kind of distal fixed prosthetic femoral holder - Google Patents

Abstract

The application discloses a distal fixed prosthesis femur holder, which comprises a front holding part, a rear holding part and a positioning shaft, wherein the positioning shaft penetrates through a rotating shaft hole of the holding part and is vertically arranged with the front holding part and the rear holding part; the front end of the positioning shaft is provided with a positioning plate, and the positioning plate is positioned at the outer side of the front holding part; the front holding part and the rear holding part are composed of a left clamp part, a right clamp part, a ratchet bar and a spring piece, wherein the left clamp part is connected with the right clamp part through riveting, the spring piece is arranged on the inner sides of the left clamp part and the right clamp part, the ratchet bar is arranged at the tail end of the right clamp part, and the tail end of the left clamp part is clamped on the ratchet bar. The technical scheme provided by the application has reasonable structure and convenient operation, and the parallel clamping and fixing are carried out on the femur at two ends which need to be butted after the parallel osteotomy of the prior hip operation, so that the time of binding and disassembling the steel wire before and after the prosthesis implantation is saved, the two ends of the femoral medullary cavity are on the same straight line when the prosthesis implantation is ensured, the operation time is shortened, and the success rate of the operation is improved.

Description

A kind of distal fixed prosthetic femoral holder

Technical field

The present invention relates to the technical field of medical devices, and in particular to a distal fixed prosthesis femoral holder.

Background technique

Congenital hip dislocation, also known as developmental hip dislocation or developmental hip dysplasia and hypoplasia. The femoral head loses its normal relationship with the acetabulum in the joint capsule, leading to complications such as joint mobility disorders, striae, perineal changes, limp gait, and shortening deformity of the affected limb. These symptoms can be treated by surgery. The surgery can use femoral rotation osteotomy and femoral shortening osteotomy followed by cross-section jointing, so that the prosthesis can be penetrated into the proximal end of the femoral medullary cavity to form fixation.

In existing surgeries, the patient's position must first be fixed, and surgical treatment is usually performed through a posterior approach. The femoral bones are sectioned in parallel and need to be docked with the remaining two ends of the femur to allow the prosthesis to penetrate smoothly. During the operation, the doctor needs to manually clamp the femur. In order to avoid distal cracking after the prosthesis is implanted, a steel wire needs to be tied to the distal end of the femur. During the beating process of implanting the prosthesis, vibration is inevitable. It is difficult to ensure that the medullary cavities of the two femurs are kept in a straight line during the beating process. During the beating process, the proximal part of the femur is prone to vibration. Rotation, resulting in deviation of the forward tilt angle; bundling and removal of wires during surgery will prolong the operation time and increase the risk of surgical failure.

Rapid and accurate penetration of the prosthesis during surgery has a decisive impact on the final effect of the surgery. Therefore, there is an urgent need to design a distal fixed prosthesis femoral holder to solve the problems existing in the existing technology.

Contents of the invention

The purpose of the present invention is to address the above technical problems. The present invention provides a distal fixed prosthesis femoral holder, which has a reasonable structure and is easy to operate. It maintains the fixation, eliminating the time of bundling and removing steel wires before and after implanting the prosthesis, ensuring that both ends of the femoral medullary cavity are in the same straight line when the prosthesis is implanted, shortening the operation time and improving the success rate of the operation.

Technical solution of the present invention

In order to solve the above technical problems, the present invention provides a distal fixed prosthetic femoral holder, which specifically includes a front holding part, a rear holding part and a positioning shaft. The positioning shaft passes through the rotation axis hole of the holding part and is connected with the front holding part. The front and rear gripping parts are arranged vertically; the front end of the positioning shaft is provided with a positioning plate, and the positioning plate is located outside the front gripping part; the front and rear gripping parts are composed of a left clamp part, a right clamp part, a ratchet The left clamp part and the right clamp part are connected by riveting. The spring piece is arranged inside the left clamp part and the right clamp part. The ratchet bar is arranged at the tail end of the right clamp part. The rear end of the pliers is clamped on the ratchet rack.

In this application, the front and rear gripping parts are vertically connected to the positioning shaft, so that the jaw planes of the front and rear gripping parts are always parallel, and the positioning axis limits the axial movement of the front and rear gripping parts. Swing, can only translate left and right; the positioning plate at the front end of the positioning shaft can assist in marking the anteversion angle of the femoral head, assisting the doctor in positioning the anteversion angle when implanting the prosthesis; after hip surgery, parallel osteotomy, the distal end of the prosthesis femoral holder is fixed The femur is clamped in parallel, and when the prosthesis is struck and implanted, the femoral medullary cavities at the front and rear ends are in the same straight line, effectively shortening the operation time and improving the success rate of the operation.

In some embodiments, the positioning plate forms an angle of 15° with the coronal plane of the human body. The positioning plate can assist in marking the anteversion angle of the femoral head, making it convenient for doctors to adjust during surgery.

In some embodiments, the front gripping part and the rear gripping part are parallel to each other and can slide freely along the positioning axis, so as to be suitable for flexible adjustment by medical personnel during surgery.

In some embodiments, the jaws of the front gripping part are wider than the jaws of the rear gripping part, and a groove is provided at the jaws of the front gripping part. The setting of the groove can avoid the protrusion of the lesser trochanter of the femur to facilitate the clamping of the femur.

In some embodiments, the inner sides of the jaws of the left and right pliers are tooth-like structures. The setting of the tooth-like structure can strengthen the contact surface between the jaws and the femur, ensuring the reliability of holding and fixation.

In some embodiments, the jaws of the left and right pliers are provided with threaded through holes, and the fastening screws are screwed through the threaded through holes and come into contact with the patient's femur. During surgery, the fastening screw can be passed through the threaded through hole so that the top of the fastening screw contacts the femur to prevent sliding and rotational friction, improve the clamping strength, and ensure the reliability of holding and fixation.

In some embodiments, at least one pair of threaded through holes are provided at the jaws, which are respectively provided at the jaws of the left and right jaws. Threaded through holes are provided in pairs, and the fastening screws pass through the threaded through holes so that the top of the fastening screw contacts the femur to ensure the reliability of holding and fixation.

Beneficial effects of the present invention:

The invention provides a distal fixed prosthetic femoral holder, which has a reasonable structure and has the following technical effects:

(1) The front and rear gripping parts are vertically connected to the positioning axis, and the distal fixed prosthesis femoral gripper holds the femur in parallel. When the prosthesis is implanted, the femoral medullary cavities at the front and rear ends are on the same straight line. Effectively shorten the operation time and improve the success rate of the operation;

(2) The positioning plate at the front end of the positioning shaft can assist in marking the anteversion angle of the femoral head and assist the doctor in positioning the anteversion angle when implanting the prosthesis.

Description of the drawings

The above-mentioned advantages of the present invention will become clearer and easier to understand through the detailed description in conjunction with the following drawings, which are only schematic and do not limit the present invention, wherein:

Figure 1 is a schematic structural diagram of a distal fixed prosthetic femoral holder according to the present invention;

Figure 2 is a side view of the front gripping part or the rear gripping part of the present invention.

In the drawings, the components represented by each number are as follows:

1. Front gripping part; 2. Rear gripping part; 3. Positioning shaft; 4. Positioning plate; 5. Left clamp part; 6. Right clamp part; 7. Ratchet bar; 8. Spring leaf; 9. Groove; 10. Tighten the screws.

Detailed ways

Figures 1 and 2 are relevant drawings of a distal fixed prosthetic femoral holder according to the present invention. The present application will be described in detail below with reference to specific embodiments and drawings.

The embodiments described here are specific implementations of the present invention and are used to illustrate the concept of the present invention. They are illustrative and illustrative and should not be construed as limiting the implementation of the present invention and the scope of the present invention. In addition to the embodiments recorded here, those skilled in the art can also adopt other obvious technical solutions based on the content disclosed in the claims and the specification of this application. These technical solutions include the use of any obvious technical solutions to the embodiments recorded here. Technical solutions for replacement and modification.

The drawings in this specification are schematic diagrams to assist in explaining the concept of the present invention, schematically showing the shapes of various parts and their mutual relationships. Please note that, in order to clearly show the structure of each component of the embodiment of the present invention, the same reference numerals are used to represent the same parts.

The structural schematic diagram of the distal fixed prosthetic femoral holder of the present application is shown in Figure 1. It includes a front holding part 1, a rear holding part 2 and a positioning shaft 3. The positioning shaft 3 passes through the rotation axis of the holding part. The hole is arranged perpendicularly to the front gripping part 1 and the rear gripping part 2; the front end of the positioning shaft 3 is provided with a positioning plate 4, and the positioning plate 4 is located outside the front gripping part 1.

In this application, the front holding part 1 and the rear holding part 2 are vertically connected to the positioning shaft 3. The front holding part 1 and the rear holding part 2 are parallel to each other and can slide freely along the positioning shaft 3. The positioning axis 3 limits the swing of the front gripping part 1 and the rear gripping part 2 along the axial direction, and can only translate left and right; after the hip surgery is performed in parallel osteotomy, the distal fixed prosthesis femoral holder holds the femur in parallel, and the prosthesis When implanted, the femoral medullary cavities at the front and back ends are in the same straight line, which effectively shortens the operation time and improves the success rate of the operation.

The positioning plate 4 is at an angle of 15° with the coronal plane of the human body. The positioning plate 4 at the front end of the positioning shaft 3 can assist in marking the anteversion angle of the femoral head, assisting the doctor in positioning the anteversion angle when implanting the prosthesis, shortening the operation time and improving the efficiency of the operation. Success rate.

Figure 2 is a side view of the front gripping part or the rear gripping part of the present invention. The front gripping part 1 and the rear gripping part 2 are composed of a left clamp part 5, a right clamp part 6, a ratchet bar 7 and a spring leaf 8. The left pliers 5 and the right pliers 6 are connected by riveting. The spring piece 8 is arranged inside the left pliers 5 and the right pliers 6. The ratchet bar 7 is arranged at the rear end of the right pliers 6. The left pliers The rear end of the part 5 is clamped on the ratchet bar 7.

In this application, the width of the jaws of the front gripping part 1 is larger than the width of the jaws of the rear gripping part 2, and a groove 9 is provided at the jaws of the front gripping part 1. The groove 9 is arranged to avoid the protrusion of the lesser trochanter of the femur to facilitate the clamping of the femur.

The inside of the jaws of the left jaw part 5 and the right jaw part 6 is a tooth-like structure. The arrangement of the tooth-like structure can strengthen the contact surface between the jaws and the femur, ensuring the reliability of holding and fixing.

The jaws of the left jaw part 5 and the right jaw part 6 are provided with threaded through holes, and the fastening screws 10 are screwed in through the threaded through holes and come into contact with the patient's femur. There are at least one pair of threaded through holes at the jaws, which are respectively provided at the jaws of the left jaw part 5 and the right jaw part 6 . During surgery, the fastening screw 10 can be passed through the threaded through hole so that the top of the fastening screw 10 contacts the femur to prevent sliding and rotational friction, improve the clamping strength, and ensure the reliability of holding and fixation.

Compared with the prior art, the present invention provides a distal fixed prosthesis femoral holder, which has a reasonable structure and is easy to operate. It can clamp and fix the two ends of the femur that need to be docked after parallel osteotomy in hip surgery in parallel. It saves the time of binding and removing steel wires before and after implanting the prosthesis, ensuring that both ends of the femoral medullary cavity are in the same straight line when the prosthesis is implanted, shortening the operation time and improving the success rate of the operation.

The present invention is not limited to the above-mentioned embodiments. Anyone can produce various other forms of products under the inspiration of the present invention. However, regardless of any changes in its shape or structure, any product with the same or similar features as the present application can The technical solutions all fall within the protection scope of the present invention.

Claims (5)

1. A distal fixed prosthetic femoral holder, characterized in that it includes a front holding part (1), a rear holding part (2) and a positioning shaft (3), and the positioning shaft (3) passes through the holding part. The rotation shaft hole is arranged perpendicularly to the front gripping part (1) and the rear gripping part (2); the front end of the positioning shaft (3) is provided with a positioning plate (4), and the positioning plate (4) is located on the front gripping part (2) 1); the front gripping part (1) and the rear gripping part (2) are composed of a left clamp part (5), a right clamp part (6), a ratchet bar (7) and a spring leaf (8). The left pliers (5) and the right pliers (6) are connected by riveting, the spring piece (8) is arranged inside the left pliers (5) and the right pliers (6), and the ratchet bar (7) ) is set at the rear end of the right clamp part (6), and the rear end of the left clamp part (5) is clamped on the ratchet bar (7); The positioning plate (4) forms an angle of 15° with the coronal plane of the human body; The width of the jaws of the front gripping part (1) is larger than that of the jaws of the rear gripping part (2), and a groove (9) is provided at the jaws of the front gripping part (1). 2. The distal fixed prosthetic femoral holder according to claim 1, characterized in that the front holding part (1) and the rear holding part (2) are parallel to each other and can slide freely along the positioning axis (3). 3. The distal fixed prosthetic femoral holder according to claim 1, characterized in that the inside of the jaws of the left clamp part (5) and the right clamp part (6) has a tooth-like structure. 4. The distal fixed prosthetic femoral holder according to claim 1, characterized in that threaded through holes are provided at the jaws of the left clamp part (5) and the right clamp part (6), and the fastening screws ( 10) Screw in through the threaded through hole and make contact with the patient's femur. 5. The distal fixed prosthetic femoral holder according to claim 4, characterized in that at least one pair of threaded through holes at the jaws is provided, which are respectively provided on the left jaw part (5) and the right jaw part (5). 6) at the jaws.