WO2022032880A1

WO2022032880A1 - Double-sided intervertebral curette

Info

Publication number: WO2022032880A1
Application number: PCT/CN2020/124582
Authority: WO
Inventors: 李维铭; 张利; 许延凯
Original assignee: 山东冠龙医疗用品有限公司
Priority date: 2020-08-12
Filing date: 2020-10-29
Publication date: 2022-02-17
Also published as: CN213606670U

Abstract

A double-sided intervertebral curette, mainly comprising a sleeve body (1), a handle (2), a movable pressure block (3), a scraper connector (4), an ejector rod (5), an upper scraper (6) and a lower scraper (7). The scraper connector (4) is fixed at a front end of the sleeve body (1), the upper scraper (6) and the lower scraper (7) are hinged onto the scraper connector (4), the handle (2) is installed at a rear end of the sleeve body (1), the movable pressure block (3) is installed on the handle (2), the ejector rod (5) passes through the sleeve body (1), and the front end thereof is connected to the upper scraper (6) and lower scraper (7) by means of a connecting rod assembly, a rear part of the ejector rod (5) is connected to the movable pressure block (3) and can be reset under the action of a spring (10), the ejector rod (5) can be pushed by pressing the movable pressure block (3) so as to drive the connecting rod assembly to promote the matching upper scraper (6) and lower scraper (7) to perform opening and closing movements. In addition, cutting edges of the upper scraper (6) and the lower scraper (7) are tooth-shaped and have an arc similar to an end plate. The double-sided intervertebral curette can improve scraping efficiency while ensuring non-excessive ablation.

Description

An intervertebral bilateral curette

technical field

The utility model relates to the field of medical instruments, in particular to an intervertebral bilateral curette.

Background technique

Intervertebral disc fusion is known as the ultimate treatment for intervertebral disc disease. It is to fuse the upper and lower vertebral bodies of the diseased intervertebral disc. The treatment method is to insert a metal or other implantable cage in the intervertebral space of the lesion to support it. The upper and lower vertebral bodies are then bone grafted to finally fuse the upper and lower vertebral bodies. The success or failure of this operation is largely dependent on whether the upper and lower endplates are processed to meet the fusion requirements. It is necessary to scrape off the cartilage layer above the cortical bone and protect the cortical bone so as not to remove too much and affect the strength of the vertebral body.

At present, there are two types of surgical instruments used clinically. One is a spoon-shaped curette with a spoon-shaped head. The operation is performed by the doctor operating the handle to scrape, and the efficiency is relatively low; the second is a shaped scraper, which is larger than the vertebra. The scraper of the gap is placed transversely into the intervertebral space. By rotating the reamer, the cutting edge on both sides of the reamer is used to scrape the end plate, and the efficiency is improved, but the rigid scraping is easy to remove too much the end plate and the size is not enough. disadvantages.

Therefore, in view of the problems existing in the above two scraping methods, it is an urgent problem to develop an efficient bilateral curette.

Utility model content

In order to overcome the above-mentioned deficiencies in the prior art, the present invention provides an intervertebral bilateral curette, which can improve the scraping efficiency on the premise of ensuring no excessive excision.

The technical scheme adopted by the utility model to solve the above technical problems is as follows: an intervertebral bilateral curette, comprising a sleeve assembly, an ejector rod and two scrapers, the two scrapers are respectively an upper scraper and a lower scraper. Both the upper scraper and the lower scraper are hinged on the front end of the casing assembly, the top rod passes through the casing assembly, the top rod is connected with the upper scraper and the lower scraper through the connecting rod assembly, and the top rod can drive the connecting rod assembly Propel the two scrapers to do the opening and closing movement. By operating the ejector rod, the upper and lower scrapers are forced to open and close. When the two scrapers are in the closed state, the size of the two scrapers is smaller than the intervertebral space, and they are placed in the intervertebral space; when the two scrapers enter the intervertebral space, operate the ejector rod. The two scrapers can be opened until the cutting edges of the upper and lower scrapers are in contact with the upper and lower endplates of the intervertebral disc, and the upper and lower endplates can be scraped at the same time by pushing the casing assembly to move back and forth to clean the entire intervertebral disc and improve the efficiency. , and can control the opening degree of the upper and lower scrapers by controlling the movement of the ejector rod, thereby realizing the control of the cutting depth and avoiding excessive cutting.

Further, both the upper scraper and the lower scraper have an arc similar to that of the intervertebral endplate. It is beneficial to scrape the intervertebral endplate and avoid the cutting edge cutting too deep into the cartilage.

Further, the cutting edges of the upper scraper and the lower scraper are provided with a row of tooth-like structures. In order to facilitate the scraping of the intervertebral endplate with the scraper.

Further, the linkage assembly includes an upper support arm and a lower support arm. When the scraper is in an open state, in terms of the upper and lower positions of this state, the upper part of the upper support arm is hinged with the upper scraper, and the upper support arm is hinged. The lower part of the lower support arm is hinged with the ejector rod, the upper part of the lower support arm is hinged with the ejector rod, and the lower part of the lower support arm is hinged with the lower scraper. The function of pushing and pulling the ejector rod to drive the upper and lower scrapers to open and close is realized by forming a simple link mechanism.

Further, the casing assembly includes a casing body, a handle and a scraper joint, the scraper joint is fixed on the front end of the casing body, and the rear parts of the upper scraper and the lower scraper are pivotally connected to the scraper joint, so the The handle is installed at the rear of the handle. The scraper joint is used to realize the installation hinge of the scraper, and the convenience of operation is realized through the handle.

Further, a movable pressure block is installed on the handle, the rear part of the ejector rod is connected with the movable pressure block, and a reset component is also arranged on the movable pressure block. By pressing the movable pressure block, the ejector rod is pushed forward, thereby realizing the opening of the scraper, and the reset of the movable pressure block is realized through the reset component, which drives the ejector rod to return and closes the scraper carefully.

Further, the reset assembly includes a spring, the top rod passes through the spring, one end of the spring is in contact with the movable pressure block, and the other end is in contact with the internal structure of the handle. Realize the reset function of the active pressing block.

Further, the rear end of the top rod is fixedly connected to the movable pressing block through a nut, and the handle is provided with a groove for abutting and accommodating part of the spring.

Further, the front end of the ejector rod is located in the middle position between the upper scraper and the lower scraper, the front end of the ejector rod is provided with a hinge groove, the two side walls of the hinge groove are fixed with pivots, and the upper The support arm and the lower support arm are hinged on the pivot.

Further, the inner sides of the upper scraper and the lower scraper are provided with accommodating grooves for accommodating the front end structure of the ejector rod and the support arm.

As can be seen from the above technical solutions, the utility model has the following advantages:

The solution provides a curette on both sides of the intervertebral space, which can drive the scraper to move by pressing the movable pressure block. When the two scrapers are in a closed state, the size of the two scrapers is smaller than the intervertebral space, and is placed in the intervertebral space; When the two scrapers enter the intervertebral space, press the movable pressure block to push the ejector rod to open the two scrapers until the cutting edges of the upper and lower scrapers are in contact with the upper and lower end plates of the intervertebral space, and then push the handle to move back and forth back and forth. The upper and lower endplates are scraped at the same time, the entire intervertebral disc is cleaned, and the efficiency is improved, and the scraper can be automatically closed by the automatic reset of the spring; and the opening degree of the upper and lower scrapers can be controlled by controlling the movement of the ejector rod, thereby realizing the control of the cutting depth, Avoid excessive excision.

Description of drawings

In order to illustrate the technical solutions of the present invention more clearly, the accompanying drawings required in the description will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention, which are very important in the art. For those of ordinary skill, other drawings can also be obtained from these drawings without any creative effort.

FIG. 1 is a schematic structural diagram of a specific embodiment of the present invention.

FIG. 2 is a schematic diagram showing the front structure of the specific embodiment of the present invention.

FIG. 3 is a schematic diagram showing a rear structure according to a specific embodiment of the present invention.

Fig. 4 is a state diagram when the scraper is closed.

Fig. 5 is a state diagram when the doctor blade is expanded.

In the figure, 1, casing body, 2, handle, 3, movable pressure block, 4, scraper joint, 5, ejector rod, 6, upper scraper, 7, lower scraper, 8, upper support arm, 9, lower support arm , 10, spring, 11, nut.

detailed description

In order to make the purpose, features and advantages of the present utility model more obvious and understandable, the technical solutions in the present utility model will be described clearly and completely below in conjunction with the accompanying drawings in the specific embodiments. Obviously, the following description The embodiments described above are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments in this patent, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this patent.

As shown in Fig. 1-Fig. 5, the present utility model provides a curette on both sides of the intervertebral body, which mainly includes a casing body 1, a handle 2, a movable pressure block 3, a push rod 5, a scraper joint 4 and a scraper, and the scraper is provided with There are two, respectively, the upper scraper 6 and the lower scraper 7, the handle 2 is fixed at the rear end of the casing body 1, the movable pressure block 3 is installed at the rear of the handle 2 and can slide in the handle 2, and the scraper joint 4 is welded and fixed at the The front end of the casing body 1 and the casing joint are installed with two pivot shafts arranged up and down, the rear parts of the upper scraper 6 and the lower scraper 7 are hinged on these two pivot shafts respectively, and the top rod 5 is removed from the casing body 1. Through, and the front end of the ejector rod 5 is located between the two scrapers through the scraper joint 4, the front end of the scraper is connected with the upper scraper 6 and the lower scraper 7 through the connecting rod assembly, and operating the ejector rod 5 can drive the connecting rod assembly to cooperate The two scrapers do an opening and closing movement, wherein the link assembly includes an upper support arm 8 and a lower support arm 9, the upper part of the upper support arm 8 is hinged with the upper scraper 6, the lower part of the upper support arm 8 is hinged with the ejector rod 5, and the lower part of the upper support arm 8 is hinged with the top rod 5. The upper part of the support arm 9 is hinged with the top rod 5, and the lower part of the lower support arm 9 is hinged with the lower scraper 7. Specifically, the columnar structure at the end of the support arm is rotatably installed in the groove structure on the inner side of the scraper, so that such a The hinged connection between the support arm and the scraper is realized in a way; a hinged groove is provided at the front end of the ejector rod 5, a pivot shaft is fixed on the two side walls of the hinged groove, and the upper support arm 8 and the lower support arm 9 are hinged on the pivot shaft to realize The hinged connection between the support arm and the ejector rod 5 . In addition, the inner sides of the upper scraper 6 and the lower scraper 7 are also provided with accommodating grooves for accommodating the front end structure of the ejector rod 5 and the support arm, so as to facilitate the closing of the scrapers.

The rear portion of the top rod 5 is connected to the movable pressing block 3 through the handle 2 , and specifically, is fixedly connected to the movable pressing block 3 through the nut 11 . In order to realize that the scraper is usually in a closed state, a spring 10 is also provided, a groove for abutting and accommodating part of the spring 10 is provided in the handle 2, one end of the spring 10 is connected to the bottom of the groove, and the other end of the spring 10 It is in contact with the movable pressing block 3 , and the ejector rod 5 passes through the spring 10 .

In addition, both the upper scraper 6 and the lower scraper 7 have a radian for the formation of the intervertebral endplate, and the cutting edges of the upper scraper 6 and the lower scraper 7 are a row of tooth-like structures, which is conducive to scraping the intervertebral endplate, Avoid the effect of cutting the cutting edge too deep into the cartilage.

The terms "upper", "lower", "outside", "inside" and the like (if any) in the description and claims of the present utility model and the above drawings are used to distinguish the relative relationship in position, and do not necessarily give characterization. It is to be understood that the data so used may be interchanged under appropriate circumstances so that the embodiments of the invention described herein can be practiced in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having", and any variations thereof, are intended to cover non-exclusive inclusion.

The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Thus, the present invention is not intended to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

An intervertebral bilateral curette, characterized in that it comprises a casing assembly, an ejector rod (5) and two scrapers, the two scrapers are respectively an upper scraper (6) and a lower scraper (7), the upper scraper (6) and the lower scraper (7) are hinged at the front end of the casing assembly, the top rod (5) passes through the casing assembly, and the top rod (5) communicates with the upper scraper (6) and the upper scraper (6) and the upper scraper (6) through the connecting rod assembly. The lower scraper (7) is connected, and the top rod (5) can drive the connecting rod assembly to urge the two matching scrapers to perform an opening and closing movement.
The intervertebral bilateral curette according to claim 1, characterized in that, both the upper scraper (6) and the lower scraper (7) are provided with an arc for matching with the intervertebral endplate.
The intervertebral bilateral curette according to claim 2, characterized in that, the cutting edges of the upper scraper (6) and the lower scraper (7) are provided with a row of tooth-like structures.
The bilateral intervertebral curette according to any one of claims 1-3, wherein the connecting rod assembly comprises an upper support arm (8) and a lower support arm (9), and the upper support arm (8) The front part of the upper support arm (8) is hinged with the upper scraper (6), the rear part of the upper support arm (8) is hinged with the top rod (5), and the front part of the lower support arm (9) is hinged with the lower scraper (7), so The rear part of the lower support arm (9) is hinged with the top rod (5).
The bilateral intervertebral curette according to any one of claims 1-3, wherein the sleeve assembly comprises a sleeve body (1), a handle (2) and a scraper joint (4), the scraper joint (4) is fixed on the front end of the casing body (1), the rear parts of the upper scraper (6) and the lower scraper (7) are pivotally connected to the scraper joint (4), and the handle (2) is mounted on the The rear of the casing body (1).
The intervertebral bilateral curette according to claim 5, characterized in that a movable pressure block (3) is installed on the handle (2), and the rear part of the ejector rod (4) is connected to the movable pressure block (3). ) connection, and a reset component is also provided on the movable pressing block (3).
The intervertebral bilateral curette according to claim 6, characterized in that the reset component comprises a spring (10), the push rod (4) passes through the spring (10), and one end of the spring (10) It is in contact with the movable pressing block (3), and the other end is in contact with the internal structure of the handle (2).
The intervertebral bilateral curette according to claim 7, characterized in that the rear end of the ejector rod (4) is fixedly connected to the movable pressing block (3) through a nut (11), and the handle ( 2) is provided with a groove for abutting and accommodating part of the spring (10).
The intervertebral bilateral curette according to claim 4, wherein the front end of the ejector rod (4) is located in the middle position between the upper scraper (6) and the lower scraper (7), and the ejector rod ( 4) The front end is provided with a hinge groove, the two side walls of the hinge groove are fixed with pivot shafts, and the upper support arm (8) and the lower support arm (9) are hinged on the pivot shafts.
The intervertebral bilateral curette according to claim 5 or 6, characterized in that, the inner side of the upper scraper (6) and the lower scraper (7) are provided with a front end structure for accommodating the ejector rod and the accommodation of the support arm groove.