阅读说明：本技术 可整体切除式黄韧带的咬除钳 (Biting and removing forceps capable of integrally cutting off ligamentum flavum ) 是由 周昌伟 刘庆鹏 于 2020-12-31 设计创作，主要内容包括：本发明公开了一种可整体切除式黄韧带的咬除钳,包括钳杆和分别设置于钳杆两端的咬合件以及控制咬合件开合的控制手柄,所述咬合件包括用于插入黄韧带与硬膜之间的定位板和与定位板转动配合用于切除黄韧带的环形活动刃板,沿所述环形活动刃板周向设置有与定位板配合剪切的刀刃,所述控制手柄带动环形活动刃板相对定位板转动以控制环形活动刃板与定位板之间的开合；可以安全挡开硬膜囊,一次插入黄韧带与硬膜之间后可沿黄韧带外周边缘整块切除,安全高效,减小硬膜损伤的风险。(The invention discloses an overall resection type ligamentum flavum biting forceps, which comprises a forceps rod, biting pieces and a control handle, wherein the biting pieces are respectively arranged at two ends of the forceps rod, the control handle is used for controlling the opening and closing of the biting pieces, each biting piece comprises a positioning plate and an annular movable blade plate, the positioning plate is used for being inserted between the ligamentum flavum and a hard film, the annular movable blade plates are in rotating fit with the positioning plate and used for resecting the ligamentum flavum, a cutting edge which is in fit with the positioning plate for shearing is arranged along the circumferential direction of each annular movable blade plate, and the control handle drives the annular movable blade plates to; can keep off safely and open the dura mater sac, once insert can follow the excision of ligamentum flavum neighboring monoblock behind between ligamentum flavum and the dura mater, safe high-efficient reduces the risk of dura mater damage.)

1. The utility model provides a can wholly cut off formula ligamentum flavum's bite and remove pincers which characterized in that: the clamping device comprises a clamping rod, clamping pieces and a control handle, wherein the clamping pieces are respectively arranged at two ends of the clamping rod, the control handle is used for controlling the clamping pieces to open and close, the clamping pieces comprise positioning plates used for being inserted between the ligamentum flavum and the hard film and annular movable blade plates which are matched with the positioning plates in a rotating mode and used for cutting the ligamentum flavum, the cutting edges which are matched with the positioning plates to cut are arranged on the circumferential direction of the annular movable blade plates, and the control handle drives the annular movable blade plates to rotate relative to the positioning plates so as to.

2. The rongeur of claim 1 in which: the blade is of a sawtooth structure.

3. The rongeur of claim 2 in which: the cutting edge of the positioning plate corresponding to the annular movable cutting edge plate is concave to form a groove matched with the cutting edge in a cutting mode.

4. The rongeur of claim 3 in which the ligamentum flavum is removable by total resection, and wherein: the positioning plate and the annular movable blade plate are both waist-shaped structures, and the positioning plate is a thin plate with a smooth surface.

5. The forceps of claim 4, wherein: the width and the length of the annular movable blade plate are both smaller than those of the positioning plate.

6. The rongeur of claim 5 in which: the positioning plate is arranged at the end of the clamp rod in a mode of forming an included angle with the clamp rod, and the annular movable blade plate is positioned between the positioning plate and the clamp rod.

7. The rongeur of claim 6 in which: the included angle between the positioning plate and the clamp rod is 110-120 degrees.

8. The rongeur of claim 1 in which: the control handle comprises a fixed handle and a movable handle, a connecting rod is arranged in the clamp rod, the movable handle is rotatably connected with the fixed handle, and the movable handle drives the annular movable blade plate to rotate through the connecting rod.

9. The forceps of claim 8, wherein: the clamp rod is provided with a hollow inner cavity, and the connecting rod is inserted into the hollow inner cavity of the clamp rod.

10. The forceps of claim 9, wherein: the fixed handle and the movable handle are fixedly connected through a rotating shaft, and the positioning plate and the annular movable blade plate are fixedly connected through the rotating shaft.

Technical Field

The invention relates to the field of medical instruments, in particular to an incising type yellow ligament biting and removing clamp.

Background

The ligamentum flavum is a layer of dense yellow connective tissue, the proximal end is located at the deep surface of the lower part of the superior vertebral plate, the distal end is located at the shallow surface of the upper part of the inferior vertebral plate, and the medial side is integrated with the interspinous ligament. The ligamentum flavum plays a role in the stability of the posterior column of the spine, while protecting the underlying dura mater. In spinal surgery, the ligamentum flavum between vertebral plates needs to be removed during the process of laminectomy decompression or fenestration decompression. In the case of severe spinal stenosis, the ligamentum flavum and dura mater are adhered, and the dura mater is easily damaged during the excision process. The previous solution is to take the nerve dissector to carefully separate the adhesions and then use the Kerrison rongeur or nucleus pulposus clamp to bite a little bit, because the vertebral plate rongeur is suitable for biting harder bone, and for tough yellow ligament, the hard yellow ligament can be removed by a way of almost tearing. Therefore, the dura mater deep in the injury often has dura mater damage and cerebrospinal fluid leakage, increasing iatrogenic injury. And because the range of biting and removing at every turn is small, an instrument is required to be inserted between the ligamentum flavum and the dura mater for many times, the risk of damaging the dura mater is increased when the instrument is inserted at every turn, and the biting and removing efficiency is low. The remedial measures also need to be repaired, low skull pressure head pain is caused after the operation, the time for placing the drainage tube is prolonged, the infection probability is increased, and the hospitalization time and the cost of the patient are increased. On the other hand, when the medial side of the ligamentum flavum is removed and the rongeur is torn off from the vertebral plate, the interspinous ligament is easily torn off together, thereby affecting the stability of the posterior column of the spinal column. Although the ligamentum flavum is removed in the prior art by adopting a shearing mode, the ligamentum flavum cannot be removed integrally at one time, and the ligamentum flavum can be removed by carrying out multiple times, such as application No. 201420795600.7 and application No. 201820319703.4.

Disclosure of Invention

In view of this, the present invention provides an incising forceps for incising the ligamentum flavum, which can safely open the dural sac, and can incise along the peripheral edge of the ligamentum flavum after being inserted between the ligamentum flavum and the dura mater at one time, thereby being safe and efficient and reducing the risk of dura mater injury.

The biting and removing forceps capable of integrally cutting off the ligamentum flavum comprise a forceps rod, biting pieces and a control handle, wherein the biting pieces are respectively arranged at two ends of the forceps rod, the control handle is used for controlling the opening and the closing of the biting pieces, each biting piece comprises a positioning plate and an annular movable blade plate, the positioning plate is used for being inserted between the ligamentum flavum and a hard film, the annular movable blade plates are in rotating fit with the positioning plate and used for cutting off the ligamentum flavum, cutting edges which are in fit with the positioning plate for shearing are arranged along the circumferential direction of each annular movable blade plate, and the control handle drives the annular movable;

further, the blade is of a sawtooth structure;

furthermore, the cutting edge of the positioning plate corresponding to the annular movable cutting edge plate is concave to form a groove matched with the cutting edge in a cutting way;

furthermore, the positioning plate and the annular movable blade plate are both waist-shaped structures, and the positioning plate is a thin plate with a smooth surface;

furthermore, the width and the length of the annular movable blade plate are both smaller than those of the positioning plate;

furthermore, the positioning plate is arranged at the end of the clamp rod in a manner of forming an included angle with the clamp rod, and the annular movable blade plate is positioned between the positioning plate and the clamp rod;

furthermore, the included angle between the positioning plate and the clamp rod is 110-120 degrees;

furthermore, the control handle comprises a fixed handle and a movable handle, a connecting rod is arranged in the clamp rod, the movable handle is rotationally connected with the fixed handle, and the movable handle drives the annular movable blade plate to rotate through the connecting rod;

furthermore, the clamp rod is provided with a hollow inner cavity, and the connecting rod is inserted into the hollow inner cavity of the clamp rod;

furthermore, the fixed handle and the movable handle are fixedly connected through a rotating shaft, and the positioning plate and the annular movable blade plate are fixedly connected through the rotating shaft.

The invention has the beneficial effects that: the biting and removing forceps capable of cutting off the ligamentum flavum integrally disclosed by the invention can safely block off the dural sac, can cut off the dural sac along the whole peripheral edge of the ligamentum flavum after being inserted between the ligamentum flavum and the dura mater at one time, is safe and efficient, and reduces the risk of dura mater injury.

Drawings

The invention is further described below with reference to the following figures and examples:

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic view of a bite piece of the present invention;

fig. 3 is a schematic view of the structure of the annular movable blade plate in the bite piece of the present invention.

Detailed Description

The biting forceps capable of integrally cutting off the ligamentum flavum comprises a forceps rod 1, biting pieces respectively arranged at two ends of the forceps rod 1 and a control handle for controlling the opening and closing of the biting pieces, wherein each biting piece comprises a positioning plate 3 used for being inserted between the ligamentum flavum and a hard film and an annular movable blade plate 2 which is in running fit with the positioning plate 3 and used for cutting off the ligamentum flavum, a cutting edge 4 which is in running fit with the positioning plate 3 is arranged along the circumferential direction of the annular movable blade plate 2, and the control handle drives the annular movable blade plate 2 to rotate relative to the positioning plate 3 so as to control the opening and closing between the annular movable blade plate 2 and the; adopt annular activity cutting edge board 2 and 3 cooperation of locating plate to cut off the mode of ligamentum flavum, annular activity cutting edge board 2 is the board of middle trompil, and has cutting edge 4 on the annular band, can keep off the dura mater sac safely, can follow the monoblock excision of ligamentum flavum peripherae after once inserting between ligamentum flavum and the dura mater. During the use, insert locating plate 3 between ligamentum flavum and the dura mater, control handle drives annular activity cutting board 2 and rotates to locating plate 3, cuts off monoblock ligamentum flavum along the neighboring edge through being located cutting edge 4 on annular activity cutting board 2 and the cooperation of locating plate 3, and the ligamentum flavum that cuts off is located the annular cavity region of annular activity cutting board 2, makes the ligamentum flavum that cuts off keep the integrality, and the thin garrulous ligamentum flavum that can not produce remains.

In this embodiment, the blade 4 has a sawtooth structure; the cutting is faster, and efficiency is higher.

In the embodiment, the cutting edges 4 of the positioning plate 3 corresponding to the annular movable cutting plate 2 are concave to form grooves matched with the cutting edges 4 in a cutting manner; the locating plate 3 is a plane plate, and in order to improve shearing effect and efficiency, the locating plate 3 is provided with a groove corresponding to the position of the movable blade plate cutting edge 4, so that the occlusal force and the shearing force are improved, and the ligamentum flavum can be rapidly sheared.

In the embodiment, the positioning plate 3 and the annular movable blade plate 2 are both waist-shaped structures, and the positioning plate 3 is a thin plate with a smooth surface; the waist shape is a structure with a plane in the middle and circular arcs at two ends, so that the ligamentum flavum and the dura mater can be conveniently inserted, and the ligamentum flavum and the dura mater can be separated without causing damage to the dura mater. The positioning plate 3 and the annular movable blade plate 2 are made of the same material as the existing biting pliers.

In the embodiment, the width and the length of the annular movable blade plate 2 are both smaller than those of the positioning plate 3; is convenient to insert between the ligamentum flavum and the dura mater to play a good role in separation, and simultaneously ensures the implementation of occlusion shearing.

In the embodiment, the positioning plate 3 is arranged at the end of the clamp rod 1 in a manner of forming an included angle with the clamp rod 1, and the annular movable blade plate 2 is positioned between the positioning plate 3 and the clamp rod 1; the included angle between the positioning plate 3 and the clamp rod 1 is 110-120 degrees; preferably 110 deg., suitable for use in minimally invasive procedures such as tunneling or endoscopy. When the clamp is used for open surgery, the positioning plate 3 and the clamp rod 1 are coaxially arranged, the positioning plate 3 and the clamp rod 1 are positioned at the same horizontal position, and the connecting end of the positioning plate 3 and the annular movable blade plate 2 is positioned at the end of the clamp rod 1.

In the embodiment, the control handle comprises a fixed handle 5 and a movable handle 6, a connecting rod is arranged in the clamp rod 1, the movable handle 6 is rotatably connected with the fixed handle 5, and the movable handle 6 drives the annular movable blade plate 2 to rotate through the connecting rod; the clamp rod 1 is provided with a hollow inner cavity, and the connecting rod is inserted into the hollow inner cavity of the clamp rod 1; the movable handle rotates towards the fixed handle, and the movable handle drives the connecting rod to control the annular movable blade plate 2 to rotate towards the fixed plate so as to control the opening and closing of the occluding piece.

In this embodiment, the fixed handle 5 and the movable handle 6 are fixedly connected through a hinge shaft, and the positioning plate 3 and the annular movable blade plate 2 are fixedly connected through a hinge shaft.

Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.