CN109846527B

CN109846527B - Ligamentum flavum planing knife for spinal surgery

Info

Publication number: CN109846527B
Application number: CN201910098444.6A
Authority: CN
Inventors: 陈艳; 潘正廉; 程宁; 王丁; 张杨玲; 刘睿
Original assignee: Chongqing Traditional Chinese Medicine Hospital
Current assignee: Chongqing Traditional Chinese Medicine Hospital
Priority date: 2019-01-31
Filing date: 2019-01-31
Publication date: 2022-05-06
Anticipated expiration: 2039-01-31
Also published as: CN109846527A

Abstract

The invention relates to a spinal surgery instrument, in particular to a ligamentum flavum planing knife for spinal surgery, which comprises a knife body, a sleeve and a motor, wherein the knife body is sleeved in the sleeve, the top and the bottom of the knife body penetrate out of the sleeve, and the top of the motor is detachably connected with the bottom of the knife body. The cutter body includes scraper, knife rest and handle of a knife, the top of handle of a knife has set firmly the knife rest, the scraper with the connection can be dismantled to the knife rest, wherein the scraper is dull sword, and the cutting edge is the cusp, the end of scraper is provided with the slider. Compared with the prior art, the yellow ligament scraping knife has the advantages that the sleeve is sleeved outside the knife body and is connected with the tail end of the knife body through the motor, the knife body is driven by the motor to scrape the yellow ligament, the problem that the yellow ligament is difficult to scrape due to the fact that the yellow ligament is too tough is solved, meanwhile, the plurality of scraping knives can be arranged, scraping efficiency and scraping stability are improved, convenience is brought to an operating doctor, and pain of a patient is relieved.

Description

Ligamentum flavum planing knife for spinal surgery

Technical Field

The invention relates to a spinal surgery instrument, in particular to a ligamentum flavum planing knife for spinal surgery.

Background

The ligamentum flavum is a dense layer of yellow connective tissue, with the proximal end starting at the deep lower side of the superior lamina and the distal end ending at the shallow upper side of the inferior lamina. 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. Tough ligamentum flavum is often removed by tearing, which often causes dura mater rupture, cerebrospinal fluid leakage and increased iatrogenic damage to the injured deep dura mater. The existing method for incising the ligamentum flavum is generally to directly incise from the surface to the deep part by using a small sharp knife, is easy to damage dura mater and nerve root, and is extremely unsafe. The scraper of scraping the ligamentum flavum simultaneously is difficult for gripping, and efficiency is slower when using a scraper alone, when the planing sword that has a plurality of scraper tool bits needs to be changed, needs to change whole cutter, difficult operation.

Disclosure of Invention

In view of the technical problems in the prior art, the invention provides the ligamentum flavum planing tool for the spinal surgery, which is convenient for replacing or increasing or decreasing the tool bit.

In order to achieve the technical purpose, the technical scheme adopted by the invention is as follows: the ligamentum flavum planing tool for the spinal surgery comprises a tool body, a sleeve and a motor, wherein the tool body is sleeved in the sleeve, the top of the tool body and the bottom of the tool body penetrate out of the sleeve, and the top of the motor is detachably connected with the bottom of the tool body. The cutter body includes scraper, knife rest and handle of a knife, the top of handle of a knife has set firmly the knife rest, the scraper with the connection can be dismantled to the knife rest, wherein the scraper is dull sword, and the cutting edge is the cusp, the end of scraper is provided with the slider. The knife rest comprises a support frame, an internal thread, a sliding groove and an upper cover in threaded connection with the internal thread, wherein the support frame is provided with an opening and a hollow cylinder at the top, the internal thread is arranged on the inner wall of the support frame, 4 sliding grooves are formed in the support frame at least at uniform intervals, and the scraper is in sliding connection with the sliding groove through a sliding block at the tail end. The upper cover comprises an upper cover body, a handle and a rubber column, the rubber column is arranged at the bottom of the upper cover body, and the handle is hinged with the top of the upper cover body. The middle part of handle of a knife is equipped with annular stopper, the end of handle of a knife is equipped with the bayonet joint. The two ends of the sleeve are respectively in threaded connection with an upper baffle and a lower baffle, and through holes for the knife handle to penetrate through are formed in the middle of the upper baffle and the middle of the lower baffle. And the output end of the motor is provided with a socket which is matched with the plug-in connector.

Adopt above-mentioned technical scheme's ligamentum flavum planer tool for spinal surgery, can increase and decrease or change the scraper in the spout, when the ligamentum flavum hardness in patient's vertebra is great or more, can be appropriate add the scraper, no longer confine to and use single kind of tool bit to strike off the ligamentum flavum, connect the motor at the end of handle of a knife simultaneously, drive the scraper through the motor and rotate, promote to scrape and get speed.

Further, the distance between the upper baffle and the lower baffle is equal to the length of the limiting block.

Further defined, the length of the sleeve is 32-38 cm.

Further, the length of the knife handle is 42-48 cm.

Further limit, the top of the upper cover is provided with a groove matched with the handle.

Further limit, the tail end of the sliding block is provided with a stop block.

Further defined, the radius of the rubber column is 1.25cm,

further limiting, the distance between the center of the support frame and the stop block is 1-1.2 cm.

Further, the height of the rubber column is equal to that of the stop block.

Compared with the prior art, the yellow ligament scraping knife has the advantages that the sleeve is sleeved outside the knife body and is connected with the tail end of the knife body through the motor, the knife body is driven by the motor to scrape the yellow ligament, the problem that the yellow ligament is difficult to scrape due to the fact that the yellow ligament is too tough is solved, meanwhile, the plurality of scraping knives can be arranged, scraping efficiency and scraping stability are improved, convenience is brought to an operating doctor, and pain of a patient is relieved.

Drawings

FIG. 1 is a schematic view of a ligamentum flavum planing tool for spinal surgery according to the present invention;

FIG. 2 is a schematic structural view of a knife body of the novel ligamentum flavum planing knife for spinal surgery;

FIG. 3 is a top view of the ligamentum flavum planing tool for spinal surgery of the present invention;

FIG. 4 is a schematic view of the construction of the scraper blade of the ligamentum flavum planing tool for spinal surgery according to the present invention;

FIG. 5 is a top view of an upper guard of the ligamentum flavum planing tool for spinal surgery in accordance with the present invention;

FIG. 6 is a schematic view showing the structure of a blade holder of the ligamentum flavum planing tool for spinal surgery according to the present invention;

the corresponding labels in the figures are: 1-cutter body, 2-sleeve, 3-motor, 11-scraper, 12-cutter frame, 13-cutter handle, 21-upper baffle, 22-lower baffle, 23-through hole, 31-interface, 111-slide block, 112-stop block, 121-support frame, 122-internal thread, 123-sliding groove, 124-upper cover, 131-limiting block, 132-plug, 1241-upper cover body, 1242-handle, 1243-rubber column and 1244-groove.

Detailed Description

In order that those skilled in the art can better understand the technical solution of the present invention, the following embodiments are further described with reference to the accompanying drawings and examples.

The ligamentum flavum planing tool for spinal surgery as shown in fig. 1, fig. 2, fig. 3, fig. 4, fig. 5 and fig. 6 comprises a cutter body 1, a sleeve 2 and a motor 3, wherein the cutter body 1 is sleeved in the sleeve 2, the top and the bottom of the cutter body both penetrate out of the sleeve 2, and the top of the motor 3 is detachably connected with the bottom of the cutter body 1. The cutter body 1 includes scraper 11, knife rest 12 and handle of a knife 13, knife rest 12 has set firmly at the top of handle of a knife 13, scraper 11 with the connection can be dismantled to knife rest 12, wherein scraper 11 is dull sword, and the cutting edge is the cusp, scraper 11's end is provided with slider 111. The knife rest 12 comprises a support frame 121, an internal thread 122, a sliding groove 123 and an upper cover 124 in threaded connection with the internal thread 122, wherein the support frame 121 is a hollow cylinder with an opening at the top, the internal thread 122 is arranged on the inner wall of the support frame 121, at least 4 sliding grooves 123 are uniformly arranged on the support frame 121 at intervals, and the scraper 11 is in sliding connection with the sliding grooves 123 through a sliding block 111 at the tail end. The upper cover 124 comprises an upper cover body 1241, a handle 1242 and a rubber column 1243, the rubber column 1243 is arranged at the bottom of the upper cover body 1241, and the handle 1242 is hinged with the top of the upper cover body 1241. The middle part of handle of a knife 13 is equipped with annular stopper 131, the end of handle of a knife 13 is equipped with bayonet joint 132. Both ends of the sleeve 2 are respectively in threaded connection with an upper baffle 21 and a lower baffle 22, wherein through holes 23 for the knife handles to pass through are formed in the middle parts of the upper baffle 21 and the lower baffle 22. The output end of the motor 3 is provided with a socket 31 matched with the plug 132. The distance between the upper baffle 21 and the lower baffle 22 is equal to the length of the limiting block 131. The length of the sleeve 2 is 32-38 cm. The length of the knife handle 13 is 42-48 cm. The top of the upper cover 124 is provided with a groove 1244 matched with the handle 1242. The end of the sliding block 111 is provided with a stop 112. The radius of the rubber column 1243 is 1.25 cm. The distance between the center of the support frame 121 and the stop block 112 is 1-1.2 cm. The height of the rubber post 1243 is equal to the height of the stopper 112.

Before the medical scraper is used, the scraper 11 for scraping ligamentum flavum slides into the sliding groove 123 from the upper side of the sliding groove 123, at least one scraper 11 is placed, the number of the scrapers 11 is increased according to the specific situation of a patient, then the upper cover 124 is pressed into the support frame 121, the upper cover 124 is in threaded connection with the support frame 121 through the internal threads 122, as the rubber column 1243 is arranged at the bottom of the upper cover 124, and the radius of the rubber column 1243 is larger than the distance between the support frame 121 and the stop block 112, the rubber column 1243 presses the scraper 11 in the cavity of the support frame 121, the sliding of the scraper 11 in the horizontal direction can be effectively avoided, and meanwhile, the height of the rubber column 1243 is the same as the height of the stop block 112, the sliding of the scraper 11 or the inclination of the scraper 11 in the vertical direction can be avoided, and the operation result is influenced. After the scraper 11 is installed, embolia the sliding sleeve 2 with the handle of a knife 13 from last to down, and screw up overhead gage 21 and lower baffle 22 at the upper and lower both ends of sliding sleeve 2 respectively, the upper and lower both ends of cutter body 1 pass in the through-hole 23 of seting up in the middle of overhead gage 21 and lower baffle 22 respectively, and the end of handle of a knife 13 pegs graft with motor 3, after exploring into the backbone with scraper 11, through the position of handheld sleeve pipe 2 proofreading scraper 11, start motor 3 afterwards, drive scraper 11 through motor 3 and scrape out ligamentum flavum in patient's backbone.

The ligamentum flavum planing tool for spinal surgery provided by the present invention has been described in detail, and the description of the specific embodiments is only provided to help understand the method and the core concept of the present invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

Claims

1. The ligamentum flavum planing tool for the spinal surgery comprises a tool body, a sleeve and a motor, wherein the tool body is sleeved in the sleeve, the top and the bottom of the tool body penetrate out of the sleeve, and the top of the motor is detachably connected with the bottom of the tool body; the cutter body comprises a scraper, a cutter frame and a cutter handle, the cutter frame is fixedly arranged at the top of the cutter handle, the scraper is detachably connected with the cutter frame, the scraper is a blunt cutter, and the cutting edge of the scraper is toothed; the middle part of handle of a knife is equipped with annular stopper, the end of handle of a knife is equipped with the bayonet joint, sheathed tube both ends threaded connection has overhead gage and lower baffle respectively, wherein the overhead gage with the through-hole that is used for the handle of a knife to pass is all offered down at the middle part of baffle, the output of motor be equipped with the identical interface of bayonet joint, its characterized in that: the scraper rack comprises a support frame, an internal thread, sliding grooves and an upper cover in threaded connection with the internal thread, wherein the support frame is a hollow cylinder with an opening at the top, the internal thread is arranged on the inner wall of the support frame, at least 4 sliding grooves are uniformly arranged on the support frame at intervals, a sliding block is arranged at the tail end of the scraper, and the scraper is in sliding connection with the sliding grooves through the sliding block at the tail end; the upper cover comprises an upper cover body, a handle and a rubber column, a groove matched with the handle is formed in the top of the upper cover, the rubber column is arranged at the bottom of the upper cover body, the handle is hinged to the top of the upper cover body, a stop block is arranged at the tail end of the sliding block, and the height of the rubber column is equal to that of the stop block; the radius of the rubber column is 1.25cm, and the distance between the center of the support frame and the stop block is 1-1.2 cm.

2. The ligamentum flavum planing tool for spinal surgery of claim 1, wherein: the distance between the upper baffle and the lower baffle is equal to the length of the limiting block.

3. The ligamentum flavum planing tool of claim 1 wherein the length of said cannula is 32-38 cm.

4. The ligamentum flavum planing tool for spinal surgery of claim 1, wherein: the length of the knife handle is 42-48 cm.