CN110755130A

CN110755130A - Medical coracoid resection device

Info

Publication number: CN110755130A
Application number: CN201911060633.0A
Authority: CN
Inventors: 刘少华; 杨爱军
Original assignee: Qilu Hospital of Shandong University
Current assignee: Qilu Hospital of Shandong University
Priority date: 2019-11-01
Filing date: 2019-11-01
Publication date: 2020-02-07
Anticipated expiration: 2039-11-01
Also published as: CN110755130B

Abstract

The invention discloses a medical coracoid process cutting device, which solves the problems that the coracoid process cutting operation is difficult and peripheral tissues are easy to damage in the prior art, can smoothly, accurately and controllably cut the coracoid process, and can effectively protect peripheral nerve, muscle and blood vessel tissues. The technical scheme is as follows: including coping saw, protection shield and direction subassembly, the direction subassembly is fixed in the protection shield inboard, coping saw bilateral symmetry sets up the protection shield, and the coping saw passes the direction subassembly can make the coping saw that is located between the protection shield be the obtuse angle through the direction subassembly.

Description

Medical coracoid resection device

Technical Field

The invention relates to the field of surgical tools, in particular to a medical coracoid resection device.

Background

The coracoid process is a hard bony prominence on the mandible consisting entirely of cortical bone, located deep and immediately surrounding the tissues of the vital nerves, great vessels, etc. The coracoid process is attached with strong temporalis, and under the condition that the temporalis contracts, the coracoid process pulls the mandible to rotate upwards and backwards, so that the mouth closing movement is realized. When the opening moves, the temporalis muscle relaxes and the coracoid process turns forward. If the rostral anterior motion is restricted due to trauma, tumor, or other reasons, restricted openings may occur.

To treat restricted openings, coracoid resections are a common clinical procedure, often performed alone or in conjunction with other procedures, characterized by an extremely deep field of view and minimal operating space. In terms of the tools and means used to cut the coracoid process, there are repeated saw cuts and osteotome cuts. The secondary saw cutting method is to cut the coracoid process from the outside to the inside from the outer root of the coracoid process by a secondary saw blade and then to take out the coracoid process. The method has the advantages of accurate operation and less damage. The disadvantage is that a bone motor system must be used, which is expensive and in particular not suitable for carrying out the operation in hospitals without a bone motor system. The osteotomy is performed by using an osteotome to chisel the coracoid process from the root of the coracoid process from anterior to posterior. The advantage of this method is that no bone motor system is required, only the simplest osteotome and mallet are used. The defect is that the coracoid process is extremely hard and deep, the direction of the osteotome force is only vertical to the long axis direction of the coracoid process, so two complications often occur, namely, the chiseled position is not in accordance with the expectation, and the instantaneously generated strong impact force causes the fracture of the mandible and the damage of important nerves, muscles and blood vessels around the coracoid process.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides a medical coracoid process resection device which can be used for successfully, accurately and controllably resecting the coracoid process and effectively protecting peripheral nerve, muscle and vascular tissues.

The invention adopts the following technical scheme:

the utility model provides a medical coracoid process resection device, includes coping saw, protection shield and direction subassembly, it is inboard that the direction subassembly is fixed in the protection shield, coping saw bilateral symmetry sets up the protection shield, and the coping saw passes the direction subassembly can make the coping saw that is located between the protection shield to be the obtuse angle through the direction subassembly.

Further, the guide assembly comprises a fixing piece, an installation shaft and a guide pulley, the fixing piece is installed on the inner side of the protection plate, and the guide pulley is connected with the fixing piece through the installation shaft.

Furthermore, the guide pulley is fixedly connected with the installation shaft, and two ends of the installation shaft respectively penetrate through the fixing piece and can rotate relative to the fixing piece.

Further, a space for the wire saw to pass through is formed between the guide pulley and the fixing piece.

Furthermore, the cross section of the fixing piece is arc-shaped.

Further, the fixing piece is fixedly connected with the protection plate.

Furthermore, the cross section of the protection plate is arc-shaped.

Compared with the prior art, the invention has the beneficial effects that:

(1) the protective plate can protect surrounding muscles, blood vessels, nerves and the like from being damaged during bone sawing operation, and can also prevent a fretsaw from popping out to hurt people after coracoid process sawing; by adjusting the angle of the protective plate, the fretsaw can keep a larger angle in the process of sawing the bone, and smooth cutting is ensured;

(2) when the wire saw reciprocates, the guide pulley can ensure that the angle formed by the wire saws on the two sides of the saw bone point is an obtuse angle instead of an acute angle, so that the saw bone can be smoothly sawed, and the occurrence of jamming is prevented; in the cutting process, the protective plate is held by hand, the position of the guide pulley is adjusted, the coracoid process cutting direction and position can be easily adjusted according to requirements, and the cutting efficiency and accuracy are improved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.

FIG. 1 is a schematic structural diagram according to a first embodiment of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1;

fig. 3 is a schematic structural diagram of a protection board according to a first embodiment of the invention;

FIG. 4 is a schematic structural diagram of a guide assembly according to a first embodiment of the present invention;

the device comprises a protective plate 1, a protective plate 2, a wire saw 3, a guide assembly 31, a fixing piece 32, a mounting shaft 33 and a guide pulley.

Detailed Description

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an", and/or "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof;

for convenience of description, the words "up", "down", "left" and "right" in this application, if any, merely indicate correspondence with the directions of up, down, left and right of the drawings themselves, and do not limit the structure, but merely facilitate the description of the invention and simplify the description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the application.

The terms "mounted", "connected", "fixed", and the like in the present application should be understood broadly, and for example, the terms "mounted", "connected", and "fixed" may be fixedly connected, detachably connected, or integrated; the two components can be connected mechanically, directly or indirectly through an intermediate medium, or connected internally or in an interaction relationship, and the terms used in the description are understood by those skilled in the art as having specific meanings according to the specific situation.

As described in the background art, the prior art has the defects of difficult operation and easy damage to surrounding tissues, and in order to solve the technical problems, the invention provides a medical coracoid resection device.

The first embodiment is as follows:

the present invention is described in detail below with reference to fig. 1 to 4, and specifically, the structure is as follows:

the embodiment provides a medical coracoid resection device, including coping saw 2, protection shield 1 and direction subassembly 3, direction subassembly 3 is fixed in protection shield 1 inboard and is close to the tip position, 2 bilateral symmetry of coping saw set up protection shield 1, and coping saw 2 passes direction subassembly 3.

The fretsaw 2 is a metal wire saw blade and is a universal component; when in use, the wire saw 2 is wound around the coracoid process, and the wire saw 2 is bent to repeatedly and forcefully saw off the coracoid process. As shown in fig. 3, the protection plate 1 is a plate member having a certain length according to an actual operation space. The cross section of protection shield 1 is slick and sly arc, and the convex surface is outside, and the concave surface is inside, and protection shield 1 can protect the important tissue around the coracoid process not cut, and protection shield 1 and guide pulley 33 cooperation can guarantee that the coracoid process can not pop out in the twinkling of an eye when being sawed off completely and hinder the people.

As shown in fig. 4, the guide assembly 3 includes a fixing member 31, a mounting shaft 32 and a guide pulley 33, the fixing member 31 is mounted inside the protection plate 1, and the fixing member 31 has an arc-shaped cross section for mounting the guide pulley 33. In this embodiment, the fixing member 31 is made of metal, and is fixedly connected to the protection plate 1.

The guide pulley 33 is fixedly connected to the mounting shaft 32, and a space through which the wire saw 2 can pass is formed between the guide pulley 33 and the fixing member 31. The two ends of the mounting shaft 32 respectively pass through the fixing member 31 and can rotate relative to the fixing member 31. The wire saw 2 passes through the space between the fixing member 31 and the guide pulley 33 and is in surface contact with the guide pulley 33, and the wire saw 2 does not damage the guide pulley 33 because the guide pulley 33 rotates simultaneously during the reciprocating motion of the wire saw 2.

The pulling angle is related to the ease with which the wire saw 2 is pulled. In the case where the guide pulley 33 is not used, since the coracoid process is located deep and the intraoral cavity is small, the wire saw 2 must be cut at an excessively small angle, which makes the wire saw 2 difficult to move and even stuck. The guide pulley 33 is installed in this embodiment, on one hand, smooth proceeding of the bone sawing process can be ensured, and on the other hand, the direction of the wire saw 2 can be changed according to the need when the coracoid process is cut off, so that the wire saw 2 is in an obtuse angle state, and accurate and controllable cutting is implemented.

The working principle of the embodiment is as follows:

when the protective plate is used, the protective plate 1 is inserted into the coracoid process, the jigsaw 2 is inserted into the guide pulley 33 on the inner side of the protective plate 1, and the jigsaw 2 is inserted into the coracoid process on the inner side of the protective plate 1. And adjusting the angle of the protective plate 1 to enable the wire saw 2 to be in an obtuse angle state, and pulling the wire saw 2 in a reciprocating mode to achieve bone sawing operation.

The protection plate 1 can protect surrounding muscles, blood vessels, nerves and the like from being damaged when the fretsaw is operated, and the guide pulley 33 can ensure that the angle formed by the fretsaw 2 at two sides of the fretsaw point is an obtuse angle instead of an acute angle when the fretsaw 2 reciprocates, so that the fretsaw is smoothly carried out, and the occurrence of blockage is prevented; the wire saw 2 can also be blocked from popping out to hurt people after the coracoid is sawed off. By adjusting the angle of the protective plate 1, the angle of the fretsaw 2 can be kept large in the process of sawing the bone, and smooth cutting is guaranteed. In the cutting process, the protective plate 1 is held by hand, the position of the tail end guide pulley 33 is adjusted, the coracoid process cutting direction can be easily changed as required, and the cutting efficiency and accuracy are improved.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. The utility model provides a medical coracoid process resection device which characterized in that, includes coping saw, protection shield and direction subassembly, it is inboard that the direction subassembly is fixed in the protection shield, coping saw bilateral symmetry sets up the protection shield, and the coping saw passes the direction subassembly can make the coping saw that is located between the protection shield to be the obtuse angle through the direction subassembly.

2. The medical coracoid resection device of claim 1, wherein the guide assembly comprises a fixing member, a mounting shaft and a guide pulley, wherein the fixing member is mounted inside the protection plate, and the guide pulley is connected with the fixing member through the mounting shaft.

3. The medical coracoid resection device of claim 2, wherein the guide pulley is fixedly connected with a mounting shaft, and the mounting shaft passes through the fixing member at both ends and can rotate relative to the fixing member.

4. The medical coracoid resection device of claim 2, wherein a space is formed between the guide pulley and the fixture for allowing a wire saw to pass through.

5. The medical coracoid resection device of claim 4, wherein the securing member is arcuate in cross-section.

6. The medical coracoid resection device of claim 2, wherein the fixture is fixedly connected to the protection plate.

7. The medical coracoid resection device of claim 1, wherein the protective plate has an arc-shaped cross-section.