CN213430281U - Hook knife for intervertebral foramen - Google Patents

Abstract

The utility model provides an intervertebral foramen is with bush-hook, it includes: a probe rod; the tool bit, including cutting part and protruding point portion, the cutting part is connected and forms the turning with the axis of probe rod with the one end of probe rod, and the turning is the obtuse angle, and the cutting part has first cutting edge, and the inboard at turning is located to first cutting edge, and the protruding point portion is located the end of cutting part and is protruded from the one side that is equipped with first cutting edge, and protruding point portion has the second cutting edge, and the second cutting edge is towards the probe rod and is connected with first cutting edge. The cutting part and the probe rod form an obtuse angle, so that a doctor can conveniently insert the cutter head below the ligamentum flavum to be cut, the second cutting edge and the first cutting edge form a hook cutter, the success rate of cutting off the ligamentum flavum is favorably improved, and the efficiency of an operation can be improved.

Description

Hook knife for intervertebral foramen

Technical Field

The utility model relates to the technical field of medical equipment, what especially relate to is a bush-hook for intervertebral foramen.

Background

The lumbar percutaneous transforaminal endoscopic surgery is a minimally invasive surgery developed in recent years for treating lumbar disc herniation, and is favored by doctors and patients due to small trauma and fast recovery. The operation needs to deal with the exploration and excision of various ligamentum flavum, intervertebral disc and fibrous tissues. In the endoscopic discectomy, a doctor usually inserts a probe into the endoscopic discectomy, and then cuts the surgical disc by observing the surgical disc through an endoscope and aligning the probe with tissues such as ligamentum flavum, which is usually distributed with nerve tissues near the ligamentum flavum, and the probe needs to avoid the nerve tissues during the cutting process.

At present, the position of the ligamentum flavum that is convenient for cut is difficult to accurately insert to the spy knife that intervertebral foramen used in the use, and the operation efficiency is lower, and the risk of operation is higher.

Therefore, there is also a need to provide a new hook-shaped scalpel for an intervertebral foramen to solve the above problems.

SUMMERY OF THE UTILITY MODEL

To the above-mentioned defect of prior art, the utility model provides an intervertebral foramen is with bush-hook convenient to improve operation efficiency.

The utility model provides a technical scheme that technical problem adopted as follows:

a hook knife for an intervertebral foramen, comprising: a probe rod; the tool bit, including cutting part and protruding point portion, the cutting part with the one end of probe rod is connected and with the axis of probe rod forms the turning, the turning is the obtuse angle, the cutting part has first cutting edge, first cutting edge is located the inboard at turning, protruding point portion is located the end of cutting part and from being equipped with one side protrusion of first cutting edge, protruding point portion has the second cutting edge, the second cutting edge orientation the probe rod and with first cutting edge is connected.

Preferably, the second blade forms a hook blade angle with the first blade, and the hook blade angle is an obtuse angle.

Preferably, the cutting part includes a body connected to the probe, the body having a side surface in the shape of a circular arc surface, and the first blade is formed at the body.

Preferably, the body has an end portion in the shape of a circular arc surface, and the convex tip portion is formed at the end portion of the body.

Preferably, the top of the convex tip portion away from the body has a circular arc surface.

Preferably, the cross section of the probe rod is in a first elliptical shape, and the major diameter of the first ellipse is coplanar with the blade of the first blade.

Preferably, the hook-up scalpel for intervertebral foramen further comprises a handle, the handle is connected with one end, far away from the tool bit, of the probe, the cross section of the handle is in a second elliptical shape, and the major diameter of the second ellipse is coplanar with the cutting edge of the first cutting edge.

Preferably, a protruding portion is arranged on the side face of the handle, the protruding portion is located at the top of the major diameter of the second ellipse, and the protruding portion and the first blade are located on the same side of the probe rod.

Preferably, the side of handle is equipped with detains the finger groove, detain the finger groove and be located the bottom of the oval major diameter of second, just the bellying is located keeping away from of handle the one end of probe rod, detain the finger groove and locate the handle is close to the one end of probe rod.

Preferably, the handle, the probe rod and the cutter head are integrally formed by stainless steel materials, and a frosted surface is arranged on the side surface of the handle.

Compared with the prior art, the utility model discloses mainly there is following beneficial effect:

the cutting part and the probe rod form an obtuse angle, so that a doctor can conveniently insert the cutter head below the ligamentum flavum to be cut, and the second cutting edge and the first cutting edge form a hook cutter, thereby being beneficial to improving the success rate of cutting off the ligamentum flavum and improving the efficiency of the operation.

Drawings

In order to illustrate the solution of the present application more clearly, the drawings that are needed in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and that other drawings can be obtained by those skilled in the art without inventive effort.

Fig. 1 is a schematic structural view of a hook knife for an intervertebral foramen according to the present invention;

FIG. 2 is an enlarged schematic view of region A of FIG. 1;

FIG. 3 is a cross-sectional view taken along line B-B of FIG. 1;

FIG. 4 is a schematic view of the structure of FIG. 1 taken along direction C;

FIG. 5 is a schematic view of the structure of FIG. 1 taken along direction D;

fig. 6 is a schematic view of a cutter head according to the present invention.

Reference numerals:

100-foramen using a hook knife, 10-bougie, 11-first ellipse, 20-bit, 21-cutting section, 211-body, 2111-side surface, 2112-end, 212-first blade, 22-nose, 221-second blade, 222-circular arc surface, 30-handle, 31-bulge, 32-finger groove, 33-second ellipse.

Detailed Description

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; the terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "including" and "having," and any variations thereof, in the description and claims of this application and the description of the above figures are intended to cover non-exclusive inclusions. The terms "first," "second," and the like in the description and claims of this application or in the above-described drawings are used for distinguishing between different objects and not for describing a particular order.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

Fig. 1 is a schematic structural view of a hook blade 100 for an intervertebral foramen according to the present invention; FIG. 2 is an enlarged schematic view of region A of FIG. 1; FIG. 3 is a cross-sectional view taken along line B-B of FIG. 1; FIG. 4 is a schematic view of the structure of FIG. 1 taken along direction C; FIG. 5 is a schematic view of the structure of FIG. 1 taken along direction D; fig. 6 is a schematic view of a cutter head 20 according to the present invention.

As shown in fig. 1 to 6, a hook-shaped knife 100 for an intervertebral foramen according to a preferred embodiment of the present invention includes: a probe 10, a cutter head 20 and a handle 30.

The probe 10 may be elongated for attachment to the cutting head 20. During surgery, the probe 10 with the cutting head 20 needs to be passed through the foraminoscope. The cross-section of the probe 10 may be in the shape of a first ellipse 11, and the major diameter of the first ellipse 11 is disposed coplanar with the edge of the first blade 212. The intervertebral foramen mirror generally has a rated aperture, and in order to ensure the movement space of the probe 10, the outer diameter of the probe 10 cannot be too large, and the cross section of the probe 10 is designed to be elliptical, which is beneficial to improving the strength of the probe 10. The major diameter of the first ellipse 11 and the blade of the first blade 212 are coplanar, which is beneficial to improving the strength of the probe 10 along the cutting direction and avoiding the bending deformation of the probe 10 after multiple uses.

The cutter head 20 includes a cutting portion 21 and a nose portion 22, the cutting portion 21 is connected to one end of the probe 10 and forms a corner θ with an axis of the probe 10, the corner θ is an obtuse angle, the cutting portion 21 has a first blade 212, the first blade 212 is disposed inside the corner θ, the nose portion 22 is disposed at a distal end of the cutting portion 21 and protrudes from a side where the first blade 212 is disposed, the nose portion 22 has a second blade 221, and the second blade 221 faces the probe 10 and is connected to the first blade 212. Compared with a right-angled or acute-angled cutting head, the cutting portion 21 forms an obtuse angle with the probe rod 10, which facilitates the operation of the doctor to insert the cutting head 20 under the ligamentum flavum to be cut. Preferably, the corner θ is 130 °, which can achieve better operation efficiency. The second blade 221 and the first blade 212 form a hook knife, which is beneficial to improving the success rate of cutting off the ligamentum flavum, thereby improving the efficiency of the operation. The first blade 212 may sever the ligamentum flavum which is well aligned. In order to avoid the nearby nervous tissue, there may be some ligamentum flavum which is not convenient to cut by transverse force, the second blade 221 and the first blade 212 form a hook knife, and the second blade 221 can cut off the ligamentum flavum which is not aligned well at the position, thereby improving the efficiency of excision of the ligamentum flavum by the intervertebral foramen surgery and being beneficial to reducing the risk of the surgery.

Preferably, the second blade edge 221 forms a hook angle α with the first blade edge 212, which is an obtuse angle. Therefore, the cutter head 20 can be conveniently inserted into the position, convenient to cut, below the ligamentum flavum, and the efficiency of cutting the ligamentum flavum can be improved. Preferably, the hook knife angle α is 120 °.

Preferably, the cutting part 21 includes a body 211, the body 211 is connected with the probe 10, the body 211 has a side surface 2111 in the shape of a circular arc surface, and the first blade 212 is formed at the side surface 2111 of the body 211. The radiused side surface 2111 advantageously avoids damage to nerve tissue or other easily damaged tissue during surgery to reduce surgical risk. The position of the connection of the first blade 212 and the body 211 is transited by an arc to improve the structural strength of the support of the first blade 212 and avoid the existence of an acute angle.

Preferably, the body 211 has an end 2112 in the shape of a circular arc surface, and the convex tip 22 is formed at the end 2112 of the body 211. The arcuate end 2112 allows the cutting head 20 to move smoothly without damaging surrounding tissue.

Preferably, the top of the nose 22 remote from the body 211 has a radiused surface 222. Therefore, the convex tip part 22 can be prevented from scratching surrounding tissues, so that the operation risk is reduced. The edges of the nose portion 22, except for the cutting edges, are rounded to avoid sharp angles. The position of the connection of the nose portion 22 with the body 211 transitions through an arc to improve the structural strength of the support of the nose portion 22 and avoid the presence of acute angles.

The body 211 of the cutter head 20 has a smooth outer surface which can be polished, and the outer surface has a high degree of finish, so that the cutter head 20 can move smoothly at the operation site without damaging surrounding tissues.

A handle 30 is attached to the end of the probe 10 distal from the cutting head 20, the handle 30 being adapted to be held by a physician. In some cases, the handle 30 may not be required for the hook-shaped scalpel 100 for the intervertebral foramen, and the end of the probe 10 far away from the tool bit 20 may be connected with a clamping device of a surgical robot. Preferably, the handle 30 has a cross-section in the shape of a second ellipse 33, with the major diameter of the second ellipse 33 being disposed coplanar with the edge of the first blade 212. The major axis of the second ellipse 33 coincides with the major axis of the first ellipse 11. The surgeon needs to accurately grasp the orientation of the blade to facilitate cutting while holding the handle 30 for the surgical procedure. The handle 30 with the oval section can facilitate the doctor to master and sense the blade direction of the first blade 212, and avoid the operation accident caused by the error cutting direction. The sides of the handle 30 may be provided with frosted surfaces to avoid slippage of the grip.

Preferably, the handle 30 is provided with a protrusion 31 on the side, the protrusion 31 is located on the top of the major diameter of the second ellipse 33, and the protrusion 31 and the first blade 212 are located on the same side of the probe 10. Therefore, when the doctor holds the handle 30, the palm can sense the convex part 31, so that the blade direction of the first blade 212 can be known, and the operation and the control are convenient.

Preferably, the side of the handle 30 is provided with a finger groove 32, the finger groove 32 is located at the bottom of the major diameter of the second ellipse 33, the protrusion 31 is located at one end of the handle 30 far away from the probe 10, and the finger groove 32 is located at one end of the handle 30 close to the probe 10. The finger groove 32 and the boss 31 are located on opposite sides of the handle 30. When the doctor holds the handle 30, the index finger can be buckled at the buckling finger groove 32, so that the holding stability can be improved, and the doctor can be prompted about the correct holding direction. The finger fastening groove 32 is matched with the convex part 31, so that the accuracy of the angle of the handle 30 held by a doctor can be further improved, and the safety of the operation is improved.

Preferably, the handle 30, the probe 10 and the cutter head 20 are integrally formed of a stainless steel material. This improves the structural strength of the entire hook 100 for an intervertebral foramen, and also contributes to improvement in the positional dimensional accuracy among the handle 30, the probe 10, and the blade 20, for example: the angle precision of the finger groove 32 and the boss 31 relative to the first blade 212 can be improved, and the offset is avoided; the relative angle precision of the first ellipse 11 and the second ellipse 33 can be improved, so that the coordination and consistency of the overall structural strength are improved; the corner precision of the connection of the cutting part 21 and the probe rod 10 can be improved, and the control accuracy can be improved. The outer surfaces of the probe 10 and the cutter head 20 are polished, so that the surface finish of the probe 10 and the cutter head 20 can be improved, the affinity of the inter-foraminous mirror hook-shaped knife 100 in contact with human tissues can be improved, and the cleaning of the inter-foraminous mirror hook-shaped knife 100 can be facilitated. Preferably, the outer surfaces of the probe 10 and the cutter head 20 are both subjected to an electropolishing process, so that the cutter head 20 having a complicated outer surface can be subjected to an all-round polishing process.

In this embodiment, the cutting portion 21 and the probe rod 10 form an obtuse angle, so that the knife head 20 can be conveniently inserted under the ligamentum flavum to be cut by the operation of a doctor, and the second cutting edge 221 and the first cutting edge 212 form a hook knife, thereby being beneficial to improving the success rate of cutting off the ligamentum flavum, improving the efficiency of the operation and reducing the risk of the operation.

It is to be understood that the above-described embodiments are merely illustrative of some, but not restrictive, of the broad invention, and that the appended drawings illustrate preferred embodiments of the invention and do not limit the scope of the invention. This application is capable of embodiments in many different forms and is provided for the purpose of enabling a thorough understanding of the disclosure of the application. Although the present application has been described in detail with reference to the foregoing embodiments, it will be apparent to one skilled in the art that the present application may be practiced without modification or with equivalents of some of the features described in the foregoing embodiments. All equivalent structures made by using the contents of the specification and the drawings of the present application are directly or indirectly applied to other related technical fields and are within the protection scope of the present application.

Claims (10)

1. A hook-shaped knife for an intervertebral foramen, which is characterized by comprising:

a probe rod;

the tool bit, including cutting part and protruding point portion, the cutting part with the one end of probe rod is connected and with the axis of probe rod forms the turning, the turning is the obtuse angle, the cutting part has first cutting edge, first cutting edge is located the inboard at turning, protruding point portion is located the end of cutting part and from being equipped with one side protrusion of first cutting edge, protruding point portion has the second cutting edge, the second cutting edge orientation the probe rod and with first cutting edge is connected.

2. The cleaver of claim 1, wherein the hook comprises a first hook and a second hook,

the second blade and the first blade form a hook blade angle which is an obtuse angle.

3. The cleaver of claim 2, wherein the hook is a hook having a hook base,

the cutting part comprises a body, the body is connected with the probe rod, the body is provided with a side surface in the shape of an arc surface, and the first blade is formed on the body.

4. The cleaver of claim 3, wherein the hook is a hook having a hook base,

the body has the tip that is the arc surface shape, the lobe portion is formed at the tip of body.

5. The hook blade for intervertebral foramen according to claim 3 or 4,

the top of the convex tip part far away from the body is provided with a circular arc surface.

6. The cleaver of claim 1, wherein the hook comprises a first hook and a second hook,

the cross section of the probe rod is in a first elliptical shape, and the major diameter of the first ellipse is coplanar with the blade of the first blade.

7. The cleaver of claim 6, wherein the hook is a hook having a hook base,

the handle is connected with one end, far away from the cutter head, of the probe rod, the cross section of the handle is in a second elliptical shape, and the major diameter of the second ellipse is coplanar with the cutting edge of the first cutting edge.

8. The cleaver of claim 7, wherein the hook is a hook having a hook base,

the side of the handle is provided with a protruding part, the protruding part is located at the top of the major axis of the second ellipse, and the protruding part and the first blade are located on the same side of the probe rod.

9. The cleaver of claim 8, wherein the hook is a hook having a hook base,

the side of handle is equipped with detains the finger groove, it is located to detain the finger groove the bottom of the oval major diameter of second, just the bellying is located keeping away from of handle the one end of probe rod, detain the finger groove and locate being close to of handle the one end of probe rod.

10. The cleaver of any one of claims 7-9,

the handle the probe rod with the tool bit is by stainless steel material integrated into one piece, just the side of handle is equipped with the frosting.

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