CN219461324U

CN219461324U - Yellow ligament incision knife for minimally invasive spine surgery

Info

Publication number: CN219461324U
Application number: CN202223190121.6U
Authority: CN
Inventors: 张陆; 高军胜; 李振涛
Original assignee: Individual
Current assignee: Peoples Hospital of Zhengzhou
Priority date: 2022-11-30
Filing date: 2022-11-30
Publication date: 2023-08-04
Anticipated expiration: 2032-11-30

Abstract

The utility model discloses a yellow ligament incision knife for spine minimally invasive surgery, wherein a knife bar is connected with a knife handle, and the end part of the knife bar is provided with a hook-shaped knife head; the cutting edge is consistent with the bending radian of the cutter head part and is positioned on the inner side of the bending of the cutter head part; the cutter head and the cutter edge are both cone-shaped. The utility model provides a be provided with the length-adjusting mechanism in the handle of a knife, length-adjusting mechanism includes barrel casing, threaded rod, draw runner and holding ring, and the barrel casing rotates the afterbody of installing at the handle of a knife, and the part of barrel casing is arranged in the inner chamber of handle of a knife, and the threaded rod passes through the helicitic texture and installs in the barrel casing, and the spout sliding fit on draw runner and the threaded rod outer wall, and the holding ring is installed in the inner chamber of handle of a knife, and the holding ring is close to the head of handle of a knife, and the holding ring is passed to the one end of cutter arbor and is installed on the tip of threaded rod. The yellow ligament incision is convenient for operation in operation; the tail end of the knife handle can be rotated after operation, and the length of the knife rod is adjusted to adapt to the length of the operation channel, so that the operability is improved.

Description

Yellow ligament incision knife for minimally invasive spine surgery

Technical Field

The utility model relates to the technical field of medical appliances, in particular to a yellow ligament incision knife for minimally invasive spine surgery.

Background

At present, the minimally invasive spinal surgery technology means that large incisions are avoided under certain medical risks, tiny incisions or puncture channels are adopted, special instruments and devices are used, normal anatomical structures reach lesions under the monitoring of an image instrument or the guidance of navigation technology, various miniature manual or electric instruments and devices are used for completing the whole surgery process under visual conditions, and the aims of smaller incisions, less tissue trauma, less bleeding, high operation accuracy, definite effect and quick postoperative function recovery compared with the traditional or standard spinal surgery are achieved. Spinal surgery is more widespread than endoscopic, small incision, and microsurgical.

The lumbar percutaneous foramen mirror operation is a minimally invasive operation for treating lumbar disc herniation, which is developed in recent years, and is favored by doctors and patients because of small trauma and quick recovery. The operation needs to deal with various probing and excision situations of ligamentum flavum, disc and fibrous tissues.

At present, a common method is to use a ligamentum flavum cutting knife (also called a hook knife and a hook knife) to align tissues such as ligamentum flavum and the like for cutting, nerve tissues are usually distributed near the ligamentum flavum, and the hook knife needs to avoid the nerve tissues during the cutting process. When a common hook knife enters into a tissue to be cut, the knife head cannot well advance, and in the advancing process of the knife head, surrounding tissues are extremely easy to be damaged accidentally, a user needs to have good operation quality, and otherwise, the operation is influenced; in addition, the length of the existing hook knife is inconvenient to adjust, sometimes the operation channel is short or long, the fixed length of the hook knife is not suitable, and the operation is affected negatively.

Disclosure of Invention

The utility model aims to provide a ligament-cutting knife for minimally invasive spine surgery, which aims to solve the problems that a general ligament-cutting knife cannot well travel in tissues and is easy to damage surrounding tissues, and the length of the ligament-cutting knife is not adjustable, so that the surgical operation is affected.

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

a yellow ligament incision knife for minimally invasive spine surgery, comprising:

a knife handle;

one end of the cutter bar is connected with one end of the cutter handle, and the other end of the cutter bar is provided with a hook-shaped cutter head part;

a blade which is positioned inside the curvature of the head portion and which is in accordance with the curvature of the head portion;

the cutter head part and the cutting edge are both cone-shaped, and the maximum thickness of the cutter head part is not smaller than that of the cutting edge.

The further technical scheme is as follows: the cutting edge is triangular pyramid-shaped.

The further technical scheme is as follows: the curved outer side of the cutter head part is a conical cutter back which is smooth.

The further technical scheme is as follows: the bending radian of the cutter head part is an obtuse angle.

The further technical scheme is as follows: the cutter head part and the cutting edge are integrally formed.

The further technical scheme is as follows: the outer peripheral surface of the cutter bar is provided with scale marks.

The further technical scheme is as follows: the utility model provides a handle of a knife is provided with the length-adjusting mechanism in, the length-adjusting mechanism includes barrel casing, threaded rod, draw runner and holding ring, the barrel casing is rotated and is installed the afterbody of handle of a knife, just the part of barrel casing is located in the inner chamber of handle of a knife, the threaded rod passes through the helicitic texture and installs in the barrel casing, at least one the draw runner is installed in the inner chamber of handle of a knife, just the draw runner with spout sliding fit on the threaded rod outer wall, the holding ring is installed in the inner chamber of handle of a knife, just the holding ring is close to the head of handle of a knife, the one end of cutter arbor passes the holding ring and installs on the tip of threaded rod.

The further technical scheme is as follows: the head of the knife handle is provided with an end cover, and a sealing material positioned between the end cover and the positioning ring is filled in the inner cavity of the knife handle.

The further technical scheme is as follows: the distance between the locating ring and the sleeve is not greater than the length of the threaded rod.

Compared with the prior art, the utility model has at least one of the following beneficial effects:

compared with the traditional hook knife, the yellow ligament incision knife for the minimally invasive spine surgery has the advantages that the knife head part is in the shape of an arc cone, so that the knife head part can smoothly cut into tissues in the minimally invasive spine surgery, the knife back of the knife head part can not damage surrounding tissues when the knife head part advances in the tissues, and when the knife head part needs to be cut, only the knife edge of the knife head part is needed to cut, and the minimally invasive spine surgery is convenient to operate; in addition, the tail end of the knife handle can be rotated after operation, and the length of the knife rod is adjusted to adapt to the length of the operation channel, so that the operability is improved.

Drawings

Fig. 1 is a schematic structural view of a ligamentum flavum incision knife for minimally invasive spine surgery.

Fig. 2 is a schematic view of the structure of the tool shank of fig. 1 according to the present utility model.

Fig. 3 is a schematic diagram of the left view of fig. 2 according to the present utility model.

Reference numerals: 1. a knife handle; 2. a cutter bar; 3. a cutter head part; 4. a blade; 5. a length adjusting mechanism; 6. a sleeve; 7. a threaded rod; 8. a slide bar; 8. a positioning ring; 9. a positioning ring; 10. an end cap; 11. a sealing material; 12. and (5) scale marks.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, based on the embodiments of the utility model, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the utility model.

In addition, the embodiments of the present utility model and the features of the embodiments may be combined with each other without collision.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, or are directions or positional relationships conventionally understood by those skilled in the art, are merely for convenience of describing the present utility model and for simplifying the description, and are not to indicate or imply that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Embodiment one:

this embodiment is shown in fig. 1, and a yellow ligament incision knife for minimally invasive spine surgery includes: a knife handle 1; the cutter bar 2, one end of the cutter bar 2 is connected with one end of the cutter bar 1, and the other end of the cutter bar 2 is provided with a hook-shaped cutter head part 3; the blade 4, the cutter head 3 and the blade 4 are integrally formed. The cutting edge 4 is consistent with the bending radian of the cutter head 3 and is positioned on the inner side of the bending of the cutter head 3; the cutter head part 3 and the cutter blade 4 are both cone-shaped, and the maximum thickness of the cutter head part 3 is not smaller than the maximum thickness of the cutter blade 4. The blade 4 is triangular pyramid shaped. The curved outer side of the cutter head part 3 is a conical cutter back which is smooth. The curvature of the cutter head 3 is obtuse.

The working process of the utility model is as follows: the cutter bar 2 is a solid cylinder made of metal materials. In the operation process, the knife handle 1 is held by the operator, the knife handle 2 and the knife head 3 are carried to pass through the intervertebral foramoscope to reach the yellow ligament incision position, because the knife head 3 and the knife edge are arc cone shapes, and the back (namely the knife back) of the knife head 3 is smooth arc surface, the knife head can cut into tissues smoothly in the spine minimally invasive surgery, the knife back of the knife head part can not damage surrounding tissues when advancing in the tissues, when needing to be incised, the knife handle 1 is only required to be pulled, the knife edge 4 of the knife head part is utilized for cutting, the operation of the operator in the operation is facilitated, the strength of the triangular pyramid-shaped knife edge 4 is better and more stable, and the knife head can not be deformed easily when incising the ligament.

Preferably, the outer circumferential surface of the cutter bar 2 is provided with scale marks 12.

In minimally invasive spinal surgery, the physician clearly recognizes the length or distance of access to the knife bar 2 by looking at the annular graduation marks 12 as the incision knife passes through the endoscope and into the patient's body, as an important reference in the surgery.

Embodiment two:

on the basis of the above embodiment, as shown in fig. 2 and 3, in this embodiment, a length adjusting mechanism 5 is provided in a tool holder 1, the length adjusting mechanism 5 includes a sleeve 6, a threaded rod 7, a sliding bar 8 and a positioning ring 9, the sleeve 6 is rotatably mounted at the tail of the tool holder 1, a part of the sleeve 6 is located in an inner cavity of the tool holder 1, the threaded rod 7 is mounted in the sleeve 6 through a threaded structure, at least one sliding bar 8 is mounted in the inner cavity of the tool holder 1, the sliding bar 8 is in sliding fit with a sliding groove on the outer wall of the threaded rod 7, the positioning ring 9 is mounted in the inner cavity of the tool holder 1, the positioning ring 9 is close to the head of the tool holder 1, and one end of the tool holder 2 passes through the positioning ring 9 and is mounted on the end of the threaded rod 7.

In operation, according to the specific length (individual difference exists in the length of the operation channel) of the constructed operation channel, or the length is changed, an operator rotates the sleeve 6 at the tail end of the knife handle 1, the rotation of the sleeve 6 can enable the threaded rod 7 to slide in the inner cavity of the knife handle 1 along the sliding strip 8, and then the knife rod 2 is driven to stretch and retract in the inner cavity of the knife handle 1 to change the length so as to adapt to the length of the operation channel and improve the operability.

Preferably, the head of the shank 1 is provided with an end cap 10, and the interior cavity of the shank 1 is filled with a sealing material 11 between the end cap 10 and the retaining ring 9.

The sealing material 11 can prevent human tissue and tissue fluid from entering the knife handle 1.

Preferably, the distance between the positioning ring 9 and the sleeve 6 is not greater than the length of the threaded rod 7.

The positioning ring 9 can prevent the threaded rod 7 from falling out of the sleeve 6.

Although the present utility model has been described with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements and changes may be made without departing from the spirit and principles of the present utility model.

Claims

1. A yellow ligament incision knife for minimally invasive spine surgery, comprising:

a knife handle (1);

the cutter bar (2), one end of the cutter bar (2) is connected with one end of the cutter handle (1), and the other end of the cutter bar (2) is provided with a hook-shaped cutter head part (3);

a blade (4), wherein the blade (4) is consistent with the bending radian of the cutter head (3) and is positioned on the inner side of the bending of the cutter head (3);

the cutter head part (3) and the cutting edge (4) are both cone-shaped, and the maximum thickness of the cutter head part (3) is not smaller than the maximum thickness of the cutting edge (4).

2. A yellow ligament incision surgical knife for minimally invasive spine surgery according to claim 1, wherein: the cutting edge (4) is triangular pyramid-shaped.

3. A yellow ligament incision surgical knife for minimally invasive spine surgery according to claim 1, wherein: the curved outer side of the tool bit part (3) is a conical tool back which is smooth.

4. A yellow ligament incision surgical knife for minimally invasive spine surgery according to claim 1, wherein: the curvature of the cutter head part (3) is an obtuse angle.

5. A yellow ligament incision surgical knife for minimally invasive spine surgery according to claim 1, wherein: the cutter head part (3) and the cutting edge (4) are integrally formed.

6. A yellow ligament incision surgical knife for minimally invasive spine surgery according to claim 1, wherein: the outer peripheral surface of the cutter bar (2) is provided with scale marks (12).

7. A yellow ligament incision surgical knife for minimally invasive spine surgery according to claim 1, wherein: the utility model provides a handle of a knife (1) is provided with long mechanism (5) in, long mechanism (5) are including barrel casing (6), threaded rod (7), draw runner (8) and holding ring (9), barrel casing (6) rotate and install the afterbody of handle of a knife (1), just the part of barrel casing (6) is located in the inner chamber of handle of a knife (1), threaded rod (7) are installed through the helicitic texture in barrel casing (6), at least one draw runner (8) are installed in the inner chamber of handle of a knife (1), just draw runner (8) with spout sliding fit on the outer wall of threaded rod (7), holding ring (9) are installed in the inner chamber of handle of a knife (1), just holding ring (9) are close to the head of handle of a knife (1), one end of cutter arbor (2) is passed holding ring (9) and is installed on the tip of threaded rod (7).

8. A yellow ligament incision surgical knife for minimally invasive spine surgery according to claim 7, wherein: the head of the knife handle (1) is provided with an end cover (10), and a sealing material (11) positioned between the end cover (10) and the positioning ring (9) is filled in the inner cavity of the knife handle (1).

9. A yellow ligament incision surgical knife for minimally invasive spine surgery according to claim 7, wherein: the distance between the locating ring (9) and the barrel sleeve (6) is not greater than the length of the threaded rod (7).