CN220676061U

CN220676061U - Intervertebral circular saw for spine

Info

Publication number: CN220676061U
Application number: CN202321798356.5U
Authority: CN
Inventors: 程磊; 张勋; 甄超
Original assignee: Beijing Naton Medical Technology Holdings Co Ltd
Current assignee: Beijing Naton Medical Technology Holdings Co Ltd
Priority date: 2023-07-10
Filing date: 2023-07-10
Publication date: 2024-03-29
Anticipated expiration: 2033-07-10

Abstract

The utility model discloses a spine intervertebral trepan, which belongs to the technical field of medical appliances and comprises a hollow tube body and a handle vertically arranged at the rear end of the tube body, wherein the head end of the tube body is provided with saw teeth, and the head of the tube body is a conical head which is gradually reduced forwards. The head of the spine intervertebral trepan is conical, so that the strength of the head can be remarkably increased, the damage of the trepan is reduced, and the bone is conveniently removed.

Description

Intervertebral circular saw for spine

Technical Field

The utility model relates to the technical field of medical appliances, in particular to a spine intervertebral trepan.

Background

Trepanning is a common surgical instrument used for removing bone neoplasms at the positions of intervertebral foramen, vertebral lamina, articular processes and the like in spinal fusion operation so as to avoid diseases such as nerve compression and the like. The current trephine commonly used in clinic, such as the novel trephine disclosed in the utility model patent CN211704749U and the visual trephine disclosed in the CN215821063U, mainly comprises a handle and a long tube, and the head of the long tube is provided with saw teeth for grinding bone neoplasms, articular processes, vertebral plates and the like. In the use, can only grind the sclerotin of contact surface through the sawtooth that annular set up, reach the purpose of getting rid of the sclerotin, this kind of structure can make to get rid of the sclerotin very hard to can increase the damage of trepan.

Disclosure of Invention

The utility model aims to provide the spine intervertebral trephine which is convenient for removing bones and reducing trephine damage.

In order to solve the technical problems, the utility model provides the following technical scheme:

the utility model provides a backbone intervertebral trepan, includes hollow body and is located the handle that the body rear end set up perpendicularly, the head end of body is equipped with the sawtooth, the head of body is the conical head that reduces forward gradually.

Further, the angle of the saw teeth is a negative angle relative to the rotation direction of the pipe body.

Further, the included angle between the two opposite sides of the conical head is 1-10 degrees.

Further, the thickness of the cutting edge on the saw tooth is 1/3-1/2 of the wall thickness of the pipe body.

Further, the peripheries of the saw teeth are beveled.

Further, scales are arranged on the outer side wall of the pipe body along the longitudinal direction.

Further, a longitudinally extending guide groove is formed in the outer side wall of the pipe body, and a plurality of ball sockets are arranged in the guide groove at intervals;

the pipe body is connected with a limiting sleeve in a sliding mode, and a spring glass bead matched with the ball socket is arranged at a position, corresponding to the guide groove, of the inner surface of the limiting sleeve.

Further, a threaded through hole is formed in the limiting sleeve, and a fixing bolt is arranged in the threaded through hole.

Further, an anti-skid sleeve is arranged on the handle.

Further, the handle is detachably connected with the pipe body.

The utility model has the following beneficial effects:

the head of the spine intervertebral trepan is conical, so that the strength of the head can be remarkably increased, the damage of the trepan is reduced, and the bone is conveniently removed.

Drawings

FIG. 1 is a schematic view of the overall construction of a spinal interbody trepan of the present utility model;

FIG. 2 is a schematic view of the tube in FIG. 1;

FIG. 3 is an enlarged schematic view of the head of the tube of FIG. 1;

FIG. 4 is a view of the serration angle of the head end of the pipe of FIG. 1;

FIG. 5 is a schematic view of the rotation direction of the head of the tube in FIG. 1;

fig. 6 is a schematic view in partial cross-section of an improved embodiment of the spinal trepan shown in fig. 1.

Detailed Description

In order to make the technical problems, technical solutions and advantages to be solved more apparent, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.

In the description of the present utility model, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", etc., are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

The utility model provides a vertebral column intervertebral trepan, as shown in figures 1-5, comprising a hollow tube body 1 and a handle 2 which is arranged at the rear end of the tube body 1 vertically, wherein the head (the direction indicated by the arrow in figure 2) end of the tube body 1 is provided with saw teeth 11, and the utility model further provides a vertebral column intervertebral trepan, wherein:

the head of the pipe body 1 is a conical head 12 which is gradually reduced forwards so as to increase the strength of the head of the circular saw and reduce the damage of the circular saw, and the included angle between the two opposite sides of the conical head 12 is preferably 1-10 degrees, such as 2 degrees, 4 degrees, 6 degrees, 8 degrees and the like, and the head of the circular saw has high strength and is convenient to grind;

further, the angle of the saw tooth 11 is a negative angle 15 (see fig. 4, where a represents the angle between one side of the saw tooth 11 and the central axis of the circular saw (tube 1), and b represents the angle between the other side of the saw tooth 11 and the central axis of the circular saw (tube 1), and the negative angle of the saw tooth 11 can be seen through the angles a and b), so that better cutting capability can be provided, bone can be removed more easily, the force of the user is facilitated, and the use feel is improved.

The head of the spine intervertebral trepan is conical, so that the strength of the head can be remarkably increased, the damage of the trepan is reduced, bones are conveniently removed, the sawtooth teeth form a negative angle relative to the rotating direction, the force of a user is convenient, the hand feeling is improved, and the grinding capability of the trepan is improved. The utility model is suitable for removing the bone neoplasms among the cervical vertebra, the thoracic vertebra and the lumbar vertebra.

As shown in FIG. 3, the thickness of the cutting edge on the serrations 11 is preferably 1/3-1/2 of the wall thickness of the tube body 1, i.e., the width of the cutting edge of the nose is X/3-X/2 when the wall thickness of the tube body 1 is X, which feature provides a smaller trauma to the patient, reduces the surgical trauma area, and also reduces peripheral nerve damage when bone is removed.

The periphery of the saw teeth 11 is preferably chamfered so as to reduce the contact area between the saw teeth and bone, improve the sharpness of the peripheral cutting edge and improve the bone grinding efficiency.

Scales (not shown) may be provided on the outer sidewall of the tube body 1 in the longitudinal direction so that a doctor can intuitively see the depth of the trephine inserted into the human body during the operation, thereby improving the safety of the operation.

The inventor finds in the research process that the trephine in the prior art is usually matched with a safety sleeve when in use, the trephine is inserted into the safety sleeve for operation, in order to prevent damage to human bodies caused by the falling of the trephine due to errors, a limiter is usually required to be added on the trephine when in use, the safety of the trephine when in use is improved by limiting through the abutting connection of the limiter and the safety sleeve, the existing limiter is simple in structure, the limiter is usually fixed on the trephine by using bolts, and the fixed limiter cannot be used for position adjustment, so that the trephine is very inconvenient to use. To solve this problem, as shown in fig. 6, in a modified embodiment, a guide groove 13 (narrow groove for matching with a spring glass bead 31 at the back) extending longitudinally may be provided on the outer side wall of the tube body 1, and a plurality of ball sockets 14 are provided in the guide groove 13 at intervals; the pipe body 1 is connected with a limit sleeve 3 in a sliding way, and a spring glass bead 31 matched with the ball socket 14 is arranged on the inner surface of the limit sleeve 3 and at a position corresponding to the guide groove 13.

When the trephine is matched with the safety sleeve for use, the limiting sleeve 3 can be pushed to move on the pipe body 1, so that the spring glass beads 31 are matched with different ball sockets 14, and the position adjustment is carried out, and the operation is convenient and quick.

Furthermore, in order to improve the fixing firmness of the stop collar 3, the stop collar 3 may be provided with a threaded through hole 32, and a fixing bolt 33 is arranged in the threaded through hole 32, so that the stop collar 3 can be firmly fixed on the pipe body 1 by manually tightening the fixing bolt 33.

In addition, an anti-slip sleeve (not shown) may be provided on the handle 2 to facilitate gripping, and may be a rubber sleeve in particular. The handle 2 and the pipe body 1 can be detachably connected, and different handles 2 can be replaced according to different use requirements, so that the use is convenient.

In summary, the utility model provides a novel trepan, the head of the trepan is conical, the width of the cutting edge of the trepan is reduced, the bevel angle on the periphery of the cutting edge is chamfered, bone is conveniently removed, the wound can be reduced, the damage to the intervertebral disc is reduced, the teeth of the saw are in a negative angle relative to the rotating direction, the force is conveniently applied by a user, the hand feeling is improved, and the grinding capability of the trepan is improved.

While the foregoing is directed to the preferred embodiments of the present utility model, it will be appreciated by those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present utility model, and such modifications and adaptations are intended to be comprehended within the scope of the present utility model.

Claims

1. The utility model provides a backbone intervertebral trepan, includes hollow body and is located the handle that the body rear end set up perpendicularly, the head end of body is equipped with the sawtooth, its characterized in that, the head of body is the conical head that reduces forward gradually.

2. The intervertebral trepan of claim 1, wherein the angle of the serrations is negative relative to the direction of rotation of the tube.

3. The intervertebral trepan of claim 1, wherein the included angle between opposite sides of the conical head is 1-10 degrees.

4. The intervertebral trepan of claim 1, wherein the thickness of the cutting edge on the serrations is 1/3-1/2 of the wall thickness of the tube body.

5. The intervertebral trepan of claim 1, wherein the peripheral edges of the serrations are beveled.

6. The intervertebral trepan of claim 1, wherein the outer sidewall of the tube is provided with graduations in a longitudinal direction.

7. The intervertebral trepan of claim 1, wherein the outer sidewall of the tube body is provided with a longitudinally extending guide slot, and a plurality of ball sockets are arranged in the guide slot at intervals;

8. The intervertebral trepan of claim 7, wherein the stop collar is provided with threaded through holes, and the threaded through holes are internally provided with fixing bolts.

9. The intervertebral trepan of claim 1, wherein the handle is provided with an anti-slip sleeve.

10. The intervertebral trepan of claim 1, wherein the handle and the tube are removably connected.