CN217488974U

CN217488974U - Measurer for combining straightening and buckling gaps

Info

Publication number: CN217488974U
Application number: CN202122457510.XU
Authority: CN
Inventors: 郭常安; 朱文润; 曹露
Original assignee: Zhongshan Hospital Fudan University
Current assignee: Zhongshan Hospital Fudan University
Priority date: 2021-10-12
Filing date: 2021-10-12
Publication date: 2022-09-27
Anticipated expiration: 2031-10-12

Abstract

The utility model discloses a caliber that extension, bucking clearance combine, a serial communication port, including the place ahead cut the hone lamella and measure the pointer of thighbone front-back footpath, the place ahead is equipped with the osteotomy mouth that is used for the level to cut bucking thighbone top in cutting the hone lamella, and the osteotomy mouth runs through the place ahead and cuts the hone lamella, and the place ahead is cut one side of hone lamella and is fixed with the fixing base, and the fixing base is connected with the connecting rod, and the top of connecting rod is fixed with the pointer. The utility model discloses a caliber simple structure, rate of accuracy are high, obtain thighbone front and back footpath size through the pointer measurement, adjust the position of the place ahead bone plate of cutting simultaneously for cut the size and the artifical joint prosthesis complete phase-match behind the bone plate cutting bone through the place ahead on, improve operation success rate and operating efficiency.

Description

Measurer for combining straightening and buckling gaps

Technical Field

The utility model relates to a stretch, caliber that bucking clearance combines belongs to medical equipment technical field.

Background

Currently, many people develop knee osteoarthritis with aging population, which causes patients to have symptoms such as knee joint soreness, inability to stand, or unstable standing, and knee joint resurfacing is the ultimate means for treating knee osteoarthritis, requiring a surgeon to resect the necrotic or worn femur 1 connected to the articular surface 3 of the tibia 4, as shown in fig. 1, and install an artificial joint prosthesis 2 to enable the patients to stand again and walk normally.

In knee bone resurfacing, the balance of the extension and flexion gaps is critical to the surgical procedure, with extension gaps being the most common method of osteotomy in the first place. When an existing bone surgeon performs a resection operation on a patient, a section is longitudinally resected on a bent femur 1 to form a first section 3, the straightening gap osteotomy is completed, as shown in fig. 2, the straightening gap and the bending gap are balanced through a gap detector, data of an artificial joint prosthesis 2 closest to the size of the femur are obtained through a gap measurer according to the sizes of the femur and the artificial joint prosthesis, and finally, resections of a second section 1-5, a third section 1-4, a fourth section 1-2 and a fifth section 1-1 on the femur 1 are sequentially performed through the osteotome, wherein the height of the fifth section 1-1 determines the size of the artificial joint prosthesis 2. After the bone cutting is finished, the artificial joint prosthesis 2 is sleeved on the cut surface of the femur 1.

However, when the current measuring device is used, the height of the osteotome in the fifth section 1-1 is measured by the measuring device only, so as to obtain the artificial joint prosthesis 2 with what size, and if the measured size is too different from the size of the artificial joint prosthesis, the cutting and the measuring are required to be carried out again; if the measured dimensions lie between the dimensions of two different artificial joint prostheses, only small artificial joint prostheses can be used, but such small artificial joint prostheses do not fit perfectly with the femur, which may have adverse effects such as unstable standing of the patient.

Disclosure of Invention

The to-be-solved technical problem of the utility model is: how to accurately match the femoral bone after osteotomy with the corresponding artificial joint prosthesis.

In order to solve the technical problem, the technical scheme of the utility model a provide a stretch out, caliber that bucking clearance combines, a serial communication port, including the place ahead cut the hone lamella and measure the pointer of thighbone front-back footpath, the place ahead is equipped with the osteotomy mouth that is used for the level to cut the bucking thighbone top in cutting the hone lamella, and the osteotomy mouth runs through the place ahead and cuts the hone lamella, and one side of the place ahead cut the hone lamella is fixed with the fixing base, and the fixing base is connected with the connecting rod, and the top of connecting rod is fixed with the pointer.

Preferably, the connecting rod be the screw rod, in the fixing base was located to the screw rod, be equipped with in the fixing base with the screw rod on the internal thread that external screw thread matches.

Preferably, one end of the pointer is a bent structure.

Compared with the prior art, the utility model discloses a caliber simple structure, rate of accuracy are high, have saved the caliber that original structure is complicated, through the place ahead osteotomy board separation with current osteotomy ware top to combine it with the pointer, obtain thighbone front and back footpath size through the pointer measurement, adjust the position of place ahead osteotomy board simultaneously, make size and artifical joint prosthesis complete phase-match behind the osteotomy mouth cutting thighbone on the osteotomy board through the place ahead, improve operation success rate and operating efficiency.

Through the utility model discloses a caliber, when accomplishing the bucking clearance and cutting the bone, measure thighbone front-back footpath size, still can accomplish the whole bone of cutting of thighbone.

Drawings

FIG. 1 is a schematic illustration of a knee joint bone surface after replacement of an artificial joint prosthesis;

FIG. 2 is a schematic representation of a femur after resection;

FIG. 3 is a perspective view of a straightening, flexing gap coupled gauge;

FIG. 4 is a side view of a straight, curved gap coupled gauge;

FIG. 5 is a schematic view of a straighten, flex gap combination gauge used in conjunction with an osteotome;

FIG. 6 is a schematic view of a straight and curved gap coupled gauge;

fig. 7 is a side plan view of fig. 6.

Detailed Description

In order to make the present invention more comprehensible, preferred embodiments are described in detail below with reference to the accompanying drawings.

Example 1

The utility model provides a measuring device for straightening and buckling clearance combination, as shown in figure 3 and figure 4, the measuring device comprises a front bone cutting plate 5-2 and a pointer 5-1 for measuring the diameter of the front and back of a femur, a bone cutting opening 5-5 for horizontally cutting the top of the buckled femur is arranged in the front bone cutting plate 5-2, the bone cutting opening 5-5 penetrates through the front bone cutting plate 5-2, a fixed seat 5-3 is fixed on one side of the front bone cutting plate 5-2, a screw rod 5-4 is arranged in the fixed seat 5-3, an internal thread matched with the external thread on the screw rod 5-4 is arranged in the fixed seat 5-3, the pointer 5-1 is fixed at the top end of the screw rod 5-4, one end of the pointer 5-1 is pressed against the top of the femur, the bottom end of the screw rod 5-4 passes through the fixed seat 5-3 for connecting a bone cutter 6, the position of the anterior osteotomy plate 5-2 on the screw 5-4 is adjusted by turning the screw 5-4, thereby obtaining what size of the artificial joint prosthesis 2 to use by indication on the screw 5-4. One end of the pointer 5-1 is of a bending structure, and the end part of the bending structure is used for propping against the top of the flexed femur. The pointer 5-1 is parallel to the osteotomy 5-5.

Wherein, the flexion gap is the distance between the femur and the upper joint surface of the tibia when the femur is flexed; the extension gap is the distance between the femoral extension and the superior articular surface of the tibia.

As shown in fig. 5-7, the utility model has the following operation processes:

on the basis that the osteotomy is accomplished based on straightening clearance to through detector 7 with the position determination of osteotomy ware 6, and with on the osteotomy ware 6 the utility model discloses a caliber 5 is fixed at osteotomy ware 6 top, measures thighbone anteroposterior footpath size through pointer 5-1 on the caliber 5, confirms 2 sizes of artificial joint prosthesis according to thighbone anteroposterior footpath size afterwards, confirms the position of osteotomy mouth 5-5 on the place ahead osteotomy board 5-2 according to the size of artificial joint prosthesis 2, carries out the excision operation of each position on the thighbone afterwards, overlaps artificial joint prosthesis 2 on the thighbone after the osteotomy at last, accomplishes knee joint bone surface replacement's operation promptly.

Example 2

In this embodiment, the screw connection between the fixing seat 5-3 and the screw rod 5-4 in embodiment 1 is changed to a fixed connection, and when the measuring device 5 of the present invention is used, an adjuster can be provided between the osteotome 6 and the measuring device 5 of the present invention, so as to adjust the height position of the measuring device 5.

The rest is the same as in example 1.

Claims

1. The measurer for combination of extension and flexion gaps is characterized by comprising a front bone cutting plate (5-2) and a pointer (5-1) for measuring the anteroposterior diameter of a femur, wherein a bone cutting opening (5-5) for horizontally cutting and flexing the top of the femur is formed in the front bone cutting plate (5-2), the bone cutting opening (5-5) penetrates through the front bone cutting plate (5-2), a fixing seat (5-3) is fixed on one side of the front bone cutting plate (5-2), the fixing seat (5-3) is connected with a connecting rod, and the pointer (5-1) is fixed at the top end of the connecting rod.

2. The measurer for the combination of the straightening clearance and the buckling clearance as claimed in claim 1, wherein the connecting rod is a screw rod (5-4), the screw rod (5-4) is arranged in the fixed seat (5-3), and an internal thread matched with an external thread on the screw rod (5-4) is arranged in the fixed seat (5-3).

3. The measurer for measuring the combination of straightening and bending gaps as claimed in claim 1, wherein one end of the pointer (5-1) is of a bent structure.