CN210843332U

CN210843332U - Knife for lumbar intervertebral disc

Info

Publication number: CN210843332U
Application number: CN201921401603.7U
Authority: CN
Inventors: 冯哲; 项良碧; 杨会峰
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-08-27
Filing date: 2019-08-27
Publication date: 2020-06-26
Anticipated expiration: 2029-08-27

Abstract

The embodiment of the application discloses a lumbar disc knife includes: operating handle, connecting rod, arc sheetmetal and tool bit, operating handle including set up at the fixed handle on connecting rod top, with fixed handle cross-hinged movable handle and the elastic component of setting between fixed handle and movable handle, the terminal fixed connection of connecting rod the arc sheetmetal, the inboard of arc sheetmetal is provided with the tool bit, the connection can be dismantled to the tool bit the catch bar in the connecting rod, the other end fixed connection of catch bar the movable handle adopts aforementioned waist intervertebral discal sword, hugs closely intervertebral disc fibre ring through the arc sheetmetal to protection dura mater and nerve root, hold movable handle down, make the tool bit stretch out, excision intervertebral disc fibre ring, easy operation is convenient, and can protect dura mater and nerve root, and then reduce the operation risk.

Description

Knife for lumbar intervertebral disc

Technical Field

The application relates to the technical field of medical equipment, in particular to a lumbar intervertebral disc knife.

Background

The lumbar disc herniation is mainly caused by that after various parts of the lumbar disc (nucleus pulposus and fibrous rings), especially the nucleus pulposus, have degenerative changes of different degrees, under the action of external force factors, the fibrous rings of the disc are ruptured, and nucleus pulposus tissues protrude (or are extruded) from the ruptured parts to the back or in the vertebral canal, so that adjacent spinal nerve roots are stimulated, and a series of clinical symptoms such as lumbar pain, numbness and pain of one lower limb or two lower limbs are generated. If the lumbar disc herniation is so severe as to compress the nerves, an open lumbar decompression procedure is required to remove the herniated diseased disc. When the open lumbar decompression operation is performed, generally, a physician assistant pulls the dura mater and the nerve roots to the inner side by using a nerve drag hook to expose a disc on one side, and a physician main scalpel cuts the fibrous ring (also called disc fibrous ring) on the periphery of the disc by using a common sharp knife.

During the above-described open discectomy procedure, there are two risks: on one hand, the combined use of both hands of an assistant doctor can cause instability of the nerve retractor, and the instability of the nerve retractor can cause great stimulation to dura mater and nerve roots; on the other hand, when a doctor mainly cuts the annulus fibrosus of the intervertebral disc, the dura mater and nerve roots are easily damaged by the used common sharp knife, so that the invention of the lumbar intervertebral disc knife which is simple and convenient and can protect the dura mater and the nerve roots is urgently needed at present to reduce the operation risk.

SUMMERY OF THE UTILITY MODEL

The application discloses a lumbar intervertebral disc knife to provide a simple and convenient lumbar intervertebral disc knife that can protect dura mater and nerve root, reduce the operation risk.

The embodiment of the application discloses lumbar disc knife includes: the operation handle, the connecting rod, the arc-shaped metal sheet and the cutter head;

the operating handle comprises a fixed handle arranged at the top end of the connecting rod, a movable handle hinged with the fixed handle in a crossed manner and an elastic piece arranged between the fixed handle and the movable handle; the movable handle can move to a position close to the fixed handle around a hinge point, and the elastic piece generates elastic deformation in the process that the movable handle moves to the fixed handle;

the connecting rod is of a hollow structure, the tail end of the connecting rod is fixedly connected with the arc-shaped metal sheet, a cutter head is arranged on the inner side of the arc-shaped metal sheet, the cutter head is detachably connected with a push rod in the connecting rod, the other end of the push rod is fixedly connected with the movable handle, and the movable handle drives the push rod to move along the central line direction of the connecting rod;

the length of the cutter head is smaller than or equal to that of the arc-shaped metal sheet, and the cutter head is of a rhombic sheet structure.

Optionally, a first sliding block is arranged at the top end of the pushing rod, and the movable handle extends into the connecting rod and is fixedly connected with the first sliding block;

the outer surface of the push rod is sleeved with a spring and a second sliding block; one end of the spring is fixedly connected with the first sliding block, the other end of the spring is fixedly connected with the second sliding block, the second sliding block is fixedly arranged on the inner wall of the connecting rod, and the spring is elastically deformed in the moving process of the movable handle to the fixed handle.

Optionally, the fixed handle and the movable handle are provided with anti-slip structures.

Optionally, the movable handle is cross-hinged with the fixed handle by screws.

Optionally, the cutter head is provided with threads, and the pushing rod is provided with a screw hole matched with the pushing rod to realize detachable connection.

Optionally, the connecting rod is of cylindrical construction.

Optionally, the lumbar intervertebral disc cutter is made of stainless steel.

Optionally, the movable handle is welded to the first slider.

Drawings

In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural view of a lumbar intervertebral disc knife provided by an embodiment of the present application;

FIG. 2 is an operational configuration diagram of a lumbar intervertebral disc knife according to an embodiment of the present disclosure;

figure 3 is a cross-sectional schematic view of a lumbar disc knife provided in an embodiment of the present application.

Wherein: 101-an operating handle; 1011-fixed handle; 1012-a movable handle; 1013-an elastic member; 102-a connecting rod; 1021-a push rod; 1022 — a first slider; 1023-a spring; 1024 — a second slider; 103-arc metal sheet; 104-tool bit.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, the present application is described in further detail with reference to the accompanying drawings and the detailed description.

The embodiment of the application discloses a lumbar intervertebral disc knife to provide a simple and convenient lumbar intervertebral disc knife capable of protecting dura mater and nerve roots, so that the operation risk is reduced.

Referring to fig. 1 and 2, there is shown a lumbar disc knife comprising: an operating handle 101, a connecting rod 102, an arc-shaped metal sheet 103 and a cutter head 104;

the operating handle 101 comprises a fixed handle 1011 arranged at the top end of the connecting rod 102, a movable handle 1012 hinged with the fixed handle 1011 in a crossing way, and an elastic member 1013 arranged between the fixed handle 1011 and the movable handle 1012; the movable handle 1012 is movable around a hinge point to a position close to the fixed handle 1011, and the elastic member 1013 is elastically deformed during the movement of the movable handle 1012 toward the fixed handle 1011.

In this embodiment, the fixed handle 1011 has a shape convenient for grasping and closing by hand, and the movable handle 1012 has a shape convenient for grasping and closing by fingers, so that the main surgeon can grasp and close the movable handle conveniently during the operation. The movable handle 1012 is hinged to the fixed handle 1011 in a crossing manner, and when the operating handle 101 is held by the surgeon, the elastic member 1013 is compressed, and the movable handle 1012 moves toward the fixed handle 1011, so that the distance between the movable handle 1012 and the fixed handle 1011 is reduced, and when the operating handle 101 is released, the elastic member 1013 is restored to its original state.

In addition, the operating handle 101 can also adopt the operating handle 101 of the existing vertebral plate forceps, so long as the functions to be realized by the application can be realized, and the application is not particularly limited.

The connecting rod 102 is of a hollow structure, the tail end of the connecting rod 102 is fixedly connected with the arc-shaped metal sheet 103, a cutter head 104 is arranged on the inner side of the arc-shaped metal sheet 103, the cutter head 104 is detachably connected with a push rod 1021 in the connecting rod 102, the other end of the push rod 1021 is fixedly connected with the movable handle 1012, and the movable handle 1012 drives the push rod 1021 to move along the direction of the central line of the connecting rod 102.

Optionally, the connecting rod 102 is a hollow cylindrical structure, and a push rod 1021 is arranged in the connecting rod.

Wherein, arc sheetmetal 103 both ends are the arc structure, and this arc structure can separate and block dura mater and nerve root more easily in the operation, reduces the injury to the human body, be dull and stereotyped structure in the middle of the arc sheetmetal 103 to make tool bit 104 can closely laminate arc sheetmetal 103.

The cutter head 104 is detachably connected with a push rod 1021 in the connecting rod 102, the cutter head 104 can move along with the push rod 1021, the push rod 1021 is fixedly connected with the movable handle 1012, the movable handle 1012 drives the push rod 1021 to move along the central line direction of the connecting rod 102, that is, the movable handle 1012 drives the cutter head 104 to move, so that the cutter head 104 extends out of the arc-shaped metal sheet 103, and the movable handle 1012 is tightly held to enable the cutter head 104 to extend out, and the cutter head can be recovered after being loosened.

The length of the cutter head 104 is less than or equal to that of the arc-shaped metal sheet 103, and the cutter head 104 is of a rhombic sheet structure.

The length of the cutter head 104 is less than or equal to the length of the arc-shaped metal sheet 103, and the width of the cutter head 104 is less than or equal to the width of the arc-shaped metal sheet 103, so that the cutter head 104 can be completely covered on the inner side of the arc-shaped metal sheet 103 in a close fit manner, and the cutter head 104 is ensured to be in a safe state when not used.

In addition, the tool bit 104 is a diamond-shaped sheet structure, in which two sides (shorter sides) connected with the push rod 1021 are smaller than two sides (longer sides) far away from the push rod 1021, wherein both sides of the longer side are edged, and the shorter side is not edged.

The cutting head 104 can be an existing surgical tool, and of course, the cutting head 104 can be replaced by a cutting head 104 with other shapes or sizes according to the surgical needs, which is not specifically limited in this application.

The embodiment of the application discloses a lumbar disc knife includes: an operating handle 101, a connecting rod 102, an arc-shaped metal sheet 103 and a cutter head 104, wherein the operating handle 101 comprises a fixed handle 1011 arranged at the top end of the connecting rod 102, a movable handle 1012 hinged with the fixed handle 1011 in a crossed way and an elastic member 1013 arranged between the fixed handle 1011 and the movable handle 1012, the tail end of the connecting rod 102 is fixedly connected with the arc-shaped metal sheet 103, the inner side of the arc-shaped metal sheet 103 is provided with a cutter head 104, the knife head 104 is detachably connected with a push rod 1021 in the connecting rod 102, the other end of the push rod 1021 is fixedly connected with the movable handle 1012, the lumbar intervertebral disc knife is adopted, the arc-shaped metal sheet 103 is tightly attached to the annulus fibrosus of the intervertebral disc, thereby protect dura mater and nerve root, hold movable handle 1012 down, make tool bit 104 stretch out, excision disc annulus fibrosus, easy operation is convenient, and can protect dura mater and nerve root, and then reduce the operation risk.

Referring to fig. 3, a first slider 1022 is disposed at a top end of the push rod 1021, and the movable handle 1012 extends into the connecting rod 102 and is fixedly connected to the first slider 1022;

the outer surface of the push rod 1021 is sleeved with a spring 1023 and a second sliding block 1024; one end of the spring 1023 is fixedly connected with the first sliding block 1022, the other end is fixedly connected with the second sliding block 1024, the second sliding block 1024 is fixedly arranged on the inner wall of the connecting rod 102, and the spring 1023 elastically deforms in the process that the movable handle 1012 moves towards the fixed handle 1011.

Optionally, the movable handle 1012 is welded to the first slider 1022.

In this embodiment, a spring 1023 in an original state is sleeved between the first slider 1022 and the second slider 1024, the first slider 1022 is used for pressing the spring 1023, the first slider 1022 can move along with the spring 1023, the second slider 1024 is fixed in the connecting rod 102, a through hole is formed in the middle of the second slider 1024, the diameter of the through hole is larger than that of the push rod 1021, so that the push rod 1021 can move through the through hole in the second slider 1024, the movable handle 1012 is pressed, the first slider 1022 connected to the end of the movable handle 1012 presses the spring 1023, the push rod 1021 moves downwards, the tool bit 104 at the tail end of the push rod 1021 extends out, the movable handle is released, the spring 1023 returns to the original state, and the tool bit 104 returns to the original state 1012.

The spring 1023 has the same function as the elastic element 1013, and the spring 1023 is added to improve the elastic effect.

Optionally, the fixed handle 1011 and the movable handle 1012 are provided with anti-slip structures.

Because liquid can appear in the operation, the anti-slip structure can ensure that the doctor grips the operating handle 101 tightly to prevent slipping during the operation.

Optionally, the movable handle 1012 is cross-hinged to the fixed handle 1011 by screws.

The two surfaces of the screw are both smooth arc-shaped, and the middle of the screw can rotate, but the specific type of the screw is not limited, for example, a rotating shaft screw or a gill shaft screw, and the application is not specifically limited.

Optionally, the tool bit 104 is provided with a thread, and the push rod 1021 is provided with a screw hole matched with the thread to realize detachable connection.

The detachable connection between the tool bit 104 and the push rod 1021 is realized through the screw of the tool bit 104 and the screw hole matched with the push rod 1021, and conversely, the detachable connection between the tool bit 104 and the push rod 1021 is also realized through the screw hole of the tool bit 104 and the screw hole matched with the push rod 1021, which is not specifically limited in the present application.

Optionally, the lumbar intervertebral disc cutter is made of stainless steel.

The lumbar intervertebral disc knife is made of stainless steel, is corrosion-resistant and avoids injury to a human body.

The embodiment of the application also discloses a using method of the lumbar intervertebral disc knife, which comprises the following steps: in the open lumbar decompression surgery, after the vertebral plate and the ligamentum flavum are removed, the dura mater and the nerve root are clearly exposed, the lumbar disc knife with a proper size is held, the dura mater and the nerve root are blocked by the arc-shaped metal sheet 103, the operation handle 101 is held to enable the arc-shaped metal sheet 103 to be tightly attached to the disc annulus fibrosus so as to prevent the dura mater or the nerve root from being exposed out of the lower part of the arc-shaped metal sheet 103 to cause accidental injury, then the movable handle 1012 is held down to enable the knife head 104 to extend out and insert the disc, the disc can be inserted and rotated left and right as necessary, the arc-shaped metal sheet 103 is always tightly attached to the disc.

When the lumbar disc knife disclosed by the embodiment of the application is used for performing open lumbar decompression surgery, an assistant doctor is not needed to assist in pulling open the dura mater and the nerve roots, the arc-shaped metal sheet 103 can well protect the dura mater and the nerve roots, the operation is simple and convenient, and the safety is high.

The present application has been described in detail with reference to specific embodiments and illustrative examples, but the description is not intended to limit the application. Those skilled in the art will appreciate that various equivalent substitutions, modifications or improvements may be made to the presently disclosed embodiments and implementations thereof without departing from the spirit and scope of the present disclosure, and these fall within the scope of the present disclosure. The protection scope of this application is subject to the appended claims.

Claims

1. A lumbar disc knife, comprising: an operating handle (101), a connecting rod (102), an arc-shaped metal sheet (103) and a cutter head (104);

the operating handle (101) comprises a fixed handle (1011) arranged at the top end of the connecting rod (102), a movable handle (1012) hinged with the fixed handle (1011) in a cross way and an elastic piece (1013) arranged between the fixed handle (1011) and the movable handle (1012); the movable handle (1012) can move to a position close to the fixed handle (1011) around a hinge point, and the elastic part (1013) is elastically deformed during the process that the movable handle (1012) moves to the fixed handle (1011);

the connecting rod (102) is of a hollow structure, the tail end of the connecting rod (102) is fixedly connected with the arc-shaped metal sheet (103), a cutter head (104) is arranged on the inner side of the arc-shaped metal sheet (103), the cutter head (104) is detachably connected with a push rod (1021) in the connecting rod (102), the other end of the push rod (1021) is fixedly connected with the movable handle (1012), and the movable handle (1012) drives the push rod (1021) to move along the direction of the central line of the connecting rod (102);

the length of the tool bit (104) is smaller than or equal to that of the arc-shaped metal sheet (103), and the tool bit (104) is of a rhombic sheet structure.

2. The lumbar disc knife as set forth in claim 1, characterized in that the top end of said pushing rod (1021) is provided with a first slider (1022), said movable handle (1012) extends to the inside of said connecting rod (102) and is fixedly connected with said first slider (1022);

the outer surface of the push rod (1021) is sleeved with a spring (1023) and a second sliding block (1024); one end of the spring (1023) is fixedly connected with the first sliding block (1022), the other end of the spring is fixedly connected with the second sliding block (1024), the second sliding block (1024) is fixedly arranged on the inner wall of the connecting rod (102), and the spring (1023) elastically deforms in the moving process of the movable handle (1012) towards the fixed handle (1011).

3. The lumbar disc knife as set forth in claim 1 or 2, characterized in that the fixed handle (1011) and the movable handle (1012) are provided with an anti-slip structure.

4. The lumbar disc knife as set forth in claim 1 or 2, characterized in that said movable handle (1012) is cross-hinged by screws to a fixed handle (1011).

5. The knife as claimed in claim 1 or 2, wherein the knife head (104) is provided with screw threads, and the pushing rod (1021) is provided with screw holes matched with the screw threads for detachable connection.

6. The lumbar disc knife as set forth in claim 1 or 2, characterized in that said connecting rod (102) is of cylindrical configuration.

7. The lumbar disc knife as set forth in claim 1 or 2, wherein the lumbar disc knife is made of stainless steel.

8. The lumbar disc knife as set forth in claim 2, characterized in that said movable handle (1012) is welded to said first slider (1022).