CN216797768U

CN216797768U - Posterior ligament opens device

Info

Publication number: CN216797768U
Application number: CN202022791304.8U
Authority: CN
Inventors: 钱澍; 周程沛; 钱济先; 黄孝敏; 宋扬; 高浩然; 高全有; 郭时空
Original assignee: SHANGHAI REACH MEDICAL INSTRUMENT CO Ltd; Air Force Medical University of PLA
Current assignee: SHANGHAI REACH MEDICAL INSTRUMENT CO Ltd; Air Force Medical University of PLA
Priority date: 2020-11-27
Filing date: 2020-11-27
Publication date: 2022-06-24
Anticipated expiration: 2030-11-27

Abstract

The utility model discloses a posterior ligament incision device, which comprises: the nerve dissector comprises a nerve dissector, a depth limiting piece sleeved on the nerve dissector and a second incision blade embedded with the nerve dissector, wherein the second incision blade is embedded on the depth limiting piece and slides along the length direction of the nerve dissector. According to the utility model, the posterior longitudinal ligament can be normally separated under the endoscope, and the injury of the nerve or the spinal cord caused by hand loss or accidental sliding can be avoided.

Description

Posterior ligament opens device

Technical Field

The utility model relates to the technical field of posterior ligament incision devices, in particular to a posterior ligament incision device.

Background

With the development of the technology, the percutaneous spinal endoscope technology is widely applied to the treatment of cervical spondylosis at present, in particular to the posterior treatment of the posterior nerve root type cervical spondylosis, and the effect is agreed by doctors and patients. In recent years, the medical application of percutaneous endoscopic assistance to the decompression fusion treatment of lumbar spinal stenosis is a fierce and well-developed in China, and the contraindications considered in the prior art are changed into indications. It has the advantages of small operative trauma, clear visual field and the like, but is not applied to anterior cervical decompression fusion surgery at present. The anterior cervical decompression fusion operation is suitable for treating cervical three-segment below pathological changes, and has the advantages of interstitial space approach, small wound and the like. However, one of the difficulties in endoscopic surgery is how to effectively remove the posterior longitudinal ligament and expose the dural sac to achieve the purpose of decompression after the cervical intervertebral disc is removed. The traditional surgical instruments usually need to carefully and carefully enlarge and separate the gap between the posterior longitudinal ligament and the dura mater by using a nerve dissector with a hook and then cut the gap by using a 1mm vertebral plate rongeur or a sharp blade, but if endoscopic surgery is performed, the operation step is difficult to be completed in two steps, and the risk of damaging the dura mater by two operations is high.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model aims to provide a posterior ligament incision device which can normally separate a posterior longitudinal ligament under an endoscope and can avoid the injury of nerves or spinal cords caused by hand loss or accidental sliding. To achieve the above objects and other advantages in accordance with the present invention, there is provided a posterior ligament incision device including:

the nerve dissector comprises a nerve dissector, a depth limiting piece sleeved on the nerve dissector and a second incision blade embedded with the nerve dissector, wherein the second incision blade is embedded on the depth limiting piece and slides along the length direction of the nerve dissector.

Preferably, the nerve dissector comprises an L-shaped guide rod, a sliding groove is formed in the L-shaped guide rod, a plurality of inverted teeth are formed in the periphery of the L-shaped guide rod, and the inner surface of the depth limiting part is matched with the inverted teeth.

Preferably, the L-shaped guide rod comprises a vertical section and a transverse section integrally connected with the vertical section, the transverse section is perpendicular to the vertical section, the transverse section is fixed at one end of the vertical section far away from the depth limiting piece, a sliding groove is formed in one side surface of the vertical section from one end surface to the other end surface, a sliding groove is formed in the surface of the transverse section close to the vertical section, and the sliding groove penetrates through the transverse section along the vertical direction.

Preferably, the second incision blade includes the cutter arbor, set up in rough line and the integral type on the cutter arbor terminal surface are connected in the cutter arbor and are kept away from the cutter blade of rough line one end.

Preferably, the width of the second slitting blade from the upper end to the lower end gradually decreases, the width of the slitting blade is a first width, the width of the transverse segment is a second width, and the second width is slightly larger than the first width.

Preferably, the depth limiting piece comprises a first side wing, a rotating ring connected with the first side wing in an integrated mode and a clamping rod block connected with the rotating ring in an integrated mode, a clamping groove corresponding to the inverted tooth is formed in the inner wall of the rotating ring, an opening is formed in the clamping rod block, and the width of the clamping rod block is slightly equal to the width of the middle of the cutter rod.

Compared with the prior art, the utility model has the beneficial effects that: handle department through the upper end at the second incision blade is handled through the rough case surface, makes things convenient for the doctor to carry out handheld, prevents to open the blade landing with the second, and the second incision blade can slide to the operation direction in the spout along L type guide arm, and on L type guide arm moreover horizontal section can only pass through the incision blade on the second incision blade, avoids the second to open the blade landing, causes the damage to ligament or spinal cord, and further limit dark piece can block to second incision blade middle part, and further prevent that the second from opening the blade landing, through dual guarantee, guarantees the security of operation maximum.

Drawings

FIG. 1 is a schematic three-dimensional structure of a posterior ligament incision device according to the present invention;

fig. 2 is a three-dimensional exploded view of the posterior ligament incision device according to the present invention.

In the figure: 50. a posterior ligament incision device; 51. nerve dissectors; 52. a second slitting blade; 53. a depth stop; an L-shaped guide bar; 512. a chute; 513. chamfering; 521. cutting a cutter rod; 522. coarse grains; 523. and (4) cutting the blade.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-2, a posterior ligament incision device comprising: the device comprises a nerve dissector 51, a depth limiting piece 53 sleeved on the nerve dissector 51 and a second incision blade 52 embedded with the nerve dissector 51, wherein the second incision blade 52 is embedded on the depth limiting piece 53, the second incision blade 52 slides along the length direction of the nerve dissector 51, and after the posterior ligament incision device 50 is used, the depth limiting piece 53 can be taken out by rotating the depth limiting piece 53.

Further, nerve shell 51 includes an L type guide arm 511, the spout 512 has been seted up on the L type guide arm 511, and a plurality of pawl 513 have been seted up along the periphery to L type guide arm 511, and depth-limiting piece 53 internal surface and pawl 513 phase-match, and this pawl 513 makes depth-limiting piece 53 can only slide to nerve shell 51's bottom direction, L type guide arm 511 include vertical section and with the horizontal section that vertical section integral type is connected, horizontal section with vertical section mutually perpendicular, just horizontal section is fixed in vertical section keeps away from a depth-limiting piece 53 tip, vertical section side is from one end to another terminal surface has seted up spout 512, horizontal section is close to the sliding tray has been seted up on the surface of vertical section, the sliding tray runs through along vertical direction horizontal section.

Further, the second incision blade 52 includes a cutting bar 521, a rough texture 522 disposed on an end surface of the cutting bar 521, and a cutting blade 523 integrally connected to an end of the cutting bar 521 away from the rough texture 522, the width of the second slitting blade 52 gradually decreases from the upper end to the lower end, the width of the slitting blade 523 is a first width, the width value of the transverse section is a second width value which is slightly larger than the first width value, as the second slitting blade 52 moves in the direction of the patient along the chute 512 in the L-shaped guide 511, the cutting blade 523 at the bottom end of the second slitting blade 52 passes through the sliding groove of the transverse segment, the depth stop 53 then locks the second incision blade 52 so that the surgeon can perform the surgery while cutting the depth and also adjusting the vertical displacement of the second incision blade 52.

Further, the depth limiting piece 53 comprises a first side wing, a rotating ring connected with the first side wing in an integrated manner, and a clamping rod block connected with the rotating ring in an integrated manner, a clamping groove corresponding to the inverted tooth 513 is formed in the inner wall of the rotating ring, an opening is formed in the clamping rod block, the width of the clamping rod block is slightly equal to the width of the middle of the cutter rod 521, when the second incision blade 52 is inserted into the clamping rod block, the bottom end of the second incision blade 52 penetrates through the clamping rod block, the middle of the second incision blade 52 is clamped by the clamping rod block, the bottom end of the second incision blade 52 is ensured to extend out of the bottom end of the nerve dissector 51, and nerve and spinal cord injury caused by hand loss or dissector sliding can be prevented.

The number of devices and the scale of the processes described herein are intended to simplify the description of the utility model, and applications, modifications and variations of the utility model will be apparent to those skilled in the art.

While embodiments of the utility model have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the utility model pertains, and further modifications may readily be made by those skilled in the art, it being understood that the utility model is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.

Claims

1. A posterior ligament incision device, comprising:

the nerve dissector comprises a nerve dissector (51), a depth limiting piece (53) sleeved on the nerve dissector (51) and a second incision blade (52) embedded with the nerve dissector (51), wherein the second incision blade (52) is embedded on the depth limiting piece (53), and the second incision blade (52) slides along the length direction of the nerve dissector (51).

2. The posterior ligament incision device according to claim 1, wherein the nerve dissector (51) comprises an L-shaped guide rod (511), the L-shaped guide rod (511) is provided with a sliding groove (512), the L-shaped guide rod (511) is provided with a plurality of inverted teeth (513) along the periphery, and the inner surface of the depth-limiting piece (53) is matched with the inverted teeth (513).

3. The posterior ligament incision device according to claim 2, wherein the L-shaped guide rod (511) comprises a vertical section and a transverse section integrally connected with the vertical section, the transverse section is perpendicular to the vertical section, the transverse section is fixed at one end of the vertical section far away from the depth stop (53), a sliding groove (512) is formed in one side surface of the vertical section from one end surface to the other end surface, a sliding groove is formed in the surface of the transverse section close to the vertical section, and the sliding groove penetrates through the transverse section in the vertical direction.

4. The posterior ligament incision device of claim 3, wherein the second incision blade (52) comprises a cutter bar (521), a rough texture (522) arranged on one end surface of the cutter bar (521), and a cutter blade (523) integrally connected to one end of the cutter bar (521) far away from the rough texture (522).

5. A posterior ligament incision device according to claim 4, wherein the width of the second incision blade (52) decreases from the upper end to the lower end, the width of the cutting blade (523) has a first width, and the width of the transverse segment has a second width, the second width being greater than the first width.

6. The posterior ligament incision device according to claim 1, wherein the depth stop (53) comprises a first side wing, a rotating ring integrally connected with the first side wing, and a rod clamping block integrally connected with the rotating ring, a clamping groove corresponding to the inverted tooth (513) is formed in the inner wall of the rotating ring, the rod clamping block is provided with an opening, and the width of the rod clamping block is equal to the width of the middle part of the cutter rod (521).