CN109717924A - Ligamentum flavum Knife for stripping cable - Google Patents
Ligamentum flavum Knife for stripping cable Download PDFInfo
- Publication number
- CN109717924A CN109717924A CN201910099101.1A CN201910099101A CN109717924A CN 109717924 A CN109717924 A CN 109717924A CN 201910099101 A CN201910099101 A CN 201910099101A CN 109717924 A CN109717924 A CN 109717924A
- Authority
- CN
- China
- Prior art keywords
- knife
- ligamentum flavum
- sleeve
- cutter hub
- stripping cable
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 210000004749 ligamentum flavum Anatomy 0.000 title claims abstract description 54
- 238000007790 scraping Methods 0.000 claims description 5
- 230000004888 barrier function Effects 0.000 claims description 4
- 210000005036 nerve Anatomy 0.000 abstract description 10
- 230000001681 protective effect Effects 0.000 abstract description 8
- 238000001356 surgical procedure Methods 0.000 abstract description 2
- 238000009434 installation Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000006378 damage Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 241001448725 Endorchis Species 0.000 description 2
- 230000006837 decompression Effects 0.000 description 2
- 210000001951 dura mater Anatomy 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000007659 motor function Effects 0.000 description 2
- 206010061213 Iatrogenic injury Diseases 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 210000002808 connective tissue Anatomy 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002684 laminectomy Methods 0.000 description 1
- 210000003041 ligament Anatomy 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
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- Surgical Instruments (AREA)
Abstract
The present invention relates to a kind of spinal surgery instrument more particularly to a kind of ligamentum flavum Knife for stripping cable.The top and bottom of rotary shaft described in ligamentum flavum Knife for stripping cable are arranged with bearing respectively, the outer wall of the bearing is fixedly connected with the inner wall of the transparent hand-held part, the bottom of the cutter hub is connect with the top side detachable of the rotary shaft, the sleeve is set in outside the cutter hub, and is threadedly coupled with the transparent hand-held part.The present invention compared with the prior art for; casing is arranged with outside cutter hub; and it is connected by the end of motor and cutter hub; it realizes and drives cutter hub to plane ligamentum flavum by motor; it solves the problems, such as to be difficult to scrape since ligamentum flavum is excessively tough and tensile; when Knife for stripping cable protrudes into patient's vertebra; protect nerve root from the scratch of cutting head by protective cover; markings are equipped on transparent hand-held part simultaneously; the direction of cutter head is identified convenient for doctor; not only convenience was brought to operative doctor, but also reduces pain suffered by patient.
Description
Technical field
The present invention relates to a kind of spinal surgery instrument more particularly to a kind of ligamentum flavum Knife for stripping cable.
Background technique
Ligamentum flavum is one layer of fine and close yellow connective tissue, and proximal end arises from upper vertebral plate lower part depth face, distally terminates in bottom
Vertebral plate top superficial surface.Ligamentum flavum plays a role to column stability after backbone, while protect the endorchis of lower section.Backbone
In surgical operation, during laminectomy for decompression or decompression by fenestration, ligamentum flavum between vertebral plate need to be cut off.It is tough for tough and tensile Huang
Band can be just removed it by way of near tearing, thus damages deep dura mater and endorchis often occurs
Breakage, leakage of cerebrospinal increase iatrogenic injury.The method for cutting ligamentum flavum at present is usually to use stylet straight from surface to deep
Cutting is connect, dura mater and nerve root are easy to damage, is absolutely unsafe.The scraper for scraping ligamentum flavum simultaneously is not easy to grasp, in limited sky
In to be struck off the operation to operator to ligamentum flavum more demanding, once hurting nerve root, feeling will be brought to patient
Or the obstacle of motor function.
Summary of the invention
In view of the technical problems existing in the prior art, scraping ligamentum flavum is driven by motor the present invention provides a kind of
Ligamentum flavum Knife for stripping cable.
To realize the above-mentioned technical purpose, The technical solution adopted by the invention is as follows: ligamentum flavum Knife for stripping cable, including cutter hub, set
Cylinder, transparent hand-held part and rotary shaft；The top and bottom of the rotary shaft are arranged with bearing, the outer wall of the bearing and institute respectively
The inner wall for stating transparent hand-held part is fixedly connected, and the bottom of the cutter hub is connect with the top side detachable of the rotary shaft, the set
Cylinder is set in outside the cutter hub, and is threadedly coupled with the transparent hand-held part；The cutter hub include cutting head, knife handle, inserting column,
Limiting slot and rubber ring, the cutting head are set to the top of the knife handle, and the inserting column is set to the center of the knife handle bottom
Place, the limiting slot are opened in the side of the grafting column bottom, and the rubber ring sleeve is set to the outer wall of the inserting column；It is described
Sleeve includes sleeve body, shield and the internal screw thread set on sleeve body bottom interior wall, and the shield is set to the sleeve
The top of ontology wherein the shield is in semi-circular shape, and is provided with inclined baffler, the resistance at the top of shield
It is recessed every the upper surface of version；The transparent hand-held part is hollow cylinder, wherein the outer wall at the top of the transparent hand-held part is set
There is the extension of annular, the outside of the extension is equipped with external screw thread；The rotary shaft includes rotation axis ontology, limited block, card
Ring and the interface for being connected to motor are connect, the interface is set to the bottom of the rotation axis ontology, and the limited block is set
Matching in the top of rotation axis ontology, and with the limiting slot, the clamping is located on the top of the rotation axis ontology, and
It is set in the outside of the limited block.
Ligamentum flavum Knife for stripping cable by adopting the above technical scheme can pass through motor by connecting motor in the end of knife handle
Scraper rotation is driven, fine and close ligamentum flavum can be not only scraped, while being equipped with shield at the top of cutting head, avoid cutting head
Nerve root is hurt when rotation, and the obstacle of feeling or motor function is brought to patient.
It further limits, the cutting head is the dentation cutter head of semicircular ring.
It further limits, the cutter head is polygonal starlike cutter head.
It further limits, the height of the cutting head is equal to the height of the shield.
It further limits, the rotary shaft is equipped with the markings for being used to indicate limited block position, and the limit
The direction of the cutting head is directed toward in channel opening direction, and above-mentioned restriction is that personnel know cutting head institute in vertebra for ease of operation
The direction of finger.
It further limits, the length of the cutter hub is 32cm.The diameter of the sleeve is 3.75mm or 4.3mm.
It further limits, the height of the clamping ring is less than the height of the limited block, and above-mentioned restriction is to guarantee knife
Limited block in handle carries out interference fit connection after being first aligned with limiting slot again.
It further limits, the diameter of the inserting column is equal to the internal diameter of the clamping ring.
It further limits, the radial distance of the rubber ring interior annular and outer toroid is 0.1 ~ 0.3mm.Above-mentioned restriction be for
Avoid the too thick or too thin fixation for being unfavorable for knife handle and rotary shaft of rubber ring.
It further limits, the edge of the shield is equipped with the scraper of dentation, and above-mentioned restriction is to increase shield
With the contact surface of ligamentum flavum, sleeve is avoided to slide.
It further limits, the diameter of the cutting head is less than the diameter of the knife handle.Above-mentioned restriction be in order to prevent due to
Cutting head is excessive and can not be inserted in sleeve, completes installation.
The present invention compared with the prior art for, be arranged with casing outside cutter hub, and connect by the end of motor and cutter hub
It connects, realizes and planed by motor drive cutter hub to ligamentum flavum, solve and be difficult to scrape since ligamentum flavum is excessively tough and tensile
Problem protects nerve root from the scratch of cutting head, while transparent when Knife for stripping cable protrudes into patient's vertebra by protective cover
Hand-held part is equipped with markings, and the direction of cutter head is identified convenient for doctor, and cutting head is detachably connected and is protected by sleeve, is convenient for
Cutting head is replaced, the ligamentum flavum being mixed in sleeve is cleared up, while avoiding cutting head from falling off again, was both brought just to operative doctor
Benefit, and reduce pain suffered by patient.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of ligamentum flavum Knife for stripping cable of the present invention；
Fig. 2 is the sectional view of ligamentum flavum Knife for stripping cable of the present invention；
Fig. 3 is the partial enlarged view in Fig. 2 at A；
Fig. 4 is the connection relationship diagram of cutter hub and rotary shaft in the use of the new type ligamentum flavum Knife for stripping cable；
Fig. 5 is the partial enlarged view in Fig. 4 at B；
Fig. 6 is the structural schematic diagram of shield in ligamentum flavum Knife for stripping cable of the present invention；
Fig. 7 is the structural schematic diagram of cutting head embodiment one in ligamentum flavum Knife for stripping cable of the present invention；
Fig. 8 is the structural schematic diagram of cutting head embodiment two in ligamentum flavum Knife for stripping cable of the present invention；
Corresponding indicate is respectively as follows: 1- cutter hub in figure, 2- sleeve, the transparent hand-held part 3-, 4- rotary shaft, 5- bearing, 11- cutting head,
12- knife handle, 13- inserting column, 14- limiting slot, 15- rubber ring, 21- sleeve body, 22- shield, 23- internal screw thread, 24- barrier
Plate, 25- scraper, 31- extension, 32- external screw thread, 33- markings, 41- rotation axis ontology, 42- limited block, 43- are clamped ring,
44- interface, the polygonal starlike cutter head of 111-, 112- semicircular ring dentation cutter head.
Specific embodiment
In order to which those skilled in the art may be better understood, with reference to the accompanying drawings and examples to the technology of the present invention
Scheme further illustrates.
Embodiment 1: as shown in Figure 1, Figure 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6 and ligamentum flavum Knife for stripping cable shown in Fig. 7 include cutter hub 1, cover
Cylinder 2, transparent hand-held part 3, rotary shaft 4 and bearing 5.The top and bottom of the rotary shaft 4 are arranged with bearing 5, the axis respectively
It holds 5 outer wall to be fixedly connected with the inner wall of the transparent hand-held part 3, the top of the bottom of the cutter hub 1 and the rotary shaft 4 can
Dismantling connection, the sleeve 2 are set in outside the cutter hub 1, and are threadedly coupled with the transparent hand-held part 3.As shown in Figure 4, Figure 5
Cutter hub 1 include cutting head 11, knife handle 12, inserting column 13, limiting slot 14 and rubber ring 15.The cutting head 11 is set to the knife
The top of handle 12, the inserting column 13 are set at the center of 12 bottom of knife handle, and the limiting slot 14 is opened in the grafting
The side of 13 bottom of column, the rubber ring 15 are sheathed on the outer wall of the inserting column 13.As shown in Fig. 2, Fig. 6, the sleeve 2 is wrapped
Sleeve body 21, shield 22 and the internal screw thread 23 set on 21 bottom interior wall of sleeve body are included, the shield 22 is set to described
The top of sleeve body 21 wherein the shield 22 is in semi-circular shape, and is provided with inclined resistance at the top of shield 22
The upper surface of partition 24, the barrier version 24 is recessed.As shown in Figure 2 and Figure 3, the transparent hand-held part 3 is hollow cylinder,
Wherein the outer wall at 3 top of transparent hand-held part is equipped with the extension 31 of annular, and the outside of the extension 31 is equipped with external screw thread
32.As shown in Figure 4, Figure 5, the rotary shaft 4 includes rotation axis ontology 41, limited block 42, clamping ring 43 and is used to connect with motor
The interface 44 connect, the interface 44 are set to the bottom of the rotation axis ontology 41, and the limited block 42 is set to rotary shaft sheet
The top of body 41, and match with the limiting slot 14, the clamping ring 43 is set to the top of the rotation axis ontology 41, and covers
It is located at the outside of the limited block 42.As shown in fig. 7, the cutting head 11 is the dentation cutter head 112 of semicircular ring.The cutting head
11 height is equal to the height of the shield 22.The rotary shaft 4 is equipped with the mark for being used to indicate 42 position of limited block
Will line 33, and 14 opening direction of the limiting slot is directed toward the direction of the cutting head 11.The length of the cutter hub 1 is 32cm.Institute
The diameter for stating sleeve 2 is 3.75mm or 4.3mm.The height of the clamping ring 43 is less than the height of the limited block 42.It is described to insert
The diameter for connecing column 13 is equal to the internal diameter of the clamping ring 43.The rubber ring 15 with a thickness of 0.1 ~ 0.3mm.The shield 22
Edge be equipped with dentation scraper.The diameter of the cutting head 11 is less than the diameter of the knife handle 12.
For the present invention before use, first screwing off sleeve 2 from transparent hand-held part 3, selection top is equipped with semicircular ring buck knife
First 112 cutter hub 11, wherein the cutting head 11 on cutter hub 1 is structure as a whole with the knife handle 12, by cutter hub 1 and rotary shaft 4 into
Row installation, during installation, the limiting slot 14 of 13 bottom of inserting column is aligned with the limited block 42 on 4 top of rotary shaft first, then to
Lower pressing knife handle 12, due to being arranged with the rubber ring 15 of 0.1 ~ 0.3mm thickness outside inserting column 13, when pressing down on, by
It is squeezed into clamping ring 43 in effect rubber circle 15, makes to be clamped ring 43 and the interference fit of inserting column 13 connects, avoid cutter hub 1 from loosening, shadow
Ring surgical effect, cutter hub 1 after the installation is completed, sleeve 2 is trapped outside cutter hub 1 from upper, and pass through the interior spiral shell of 2 bottom of sleeve
The external screw thread 32 at 31 top of line 23 and extension is threadedly coupled, and by the output end of electrosurgical machine and 4 end of rotary shaft
44 grafting of interface, complete the installation of Knife for stripping cable.Sleeve 2 is protruded into patient's vertebra, observes and rotates through transparent hand-held part 3
Markings 33 on axis 4, to confirm the signified direction of cutting head 11, subsequent start-up motor drives cutter hub 1 to revolve by rotary shaft 4
Turn, scrape ligamentum flavum in patient body, ligamentum flavum rotation is driven when cutter head rotates, it, will when cutter head end is transferred in shield 22
Ligamentum flavum is torn from vertebra inner wall.The top and bottom of rotary shaft 4 is arranged with bearing 5, and cutter hub 1 is set in sleeve 2, therefore
Motor rotate when, transparent hand-held part 3 will not rotate with sleeve 2, can to avoid sleeve 2 in patient's vertebra quick rotation pair
Patient damages.Simultaneously because the top of sleeve 2 is equipped with shield 22, and the top of shield 22 is equipped with baffler 24, because
This can be to avoid the nerve root of the injured patients when cutting head 11 rotates, while when sleeve 2 protrudes into the vertebra of patient, inclination
Baffler 24 nerve root can be guided to cutting head 11 other side for scraping range, injured nerve root is avoided, due to yellow tough
Band be in vertebra it is irregular, doctor can adjust the direction of protective cover 22 by operation transparent hand-held part 3 with moving sleeve 2,
To realize that the ligamentum flavum to assigned direction in vertebra strikes off, and it is equipped with the scraper 25 of dentation at the edge of protective cover 22, is used for
The contact surface for increasing protective cover 22 and ligamentum flavum, prevents sleeve 2 from rotating or sliding in vertebra, influences to scrape effect.
Embodiment 2: embodiment 1: as shown in Figure 1, Figure 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6 and ligamentum flavum Knife for stripping cable shown in Fig. 8 include
Cutter hub 1, sleeve 2, transparent hand-held part 3, rotary shaft 4 and bearing 5.The top and bottom of the rotary shaft 4 are arranged with bearing respectively
5, the outer wall of the bearing 5 is fixedly connected with the inner wall of the transparent hand-held part 3, the bottom of the cutter hub 1 and the rotary shaft 4
Top side detachable connection, the sleeve 2 is set in outside the cutter hub 1, and is threadedly coupled with the transparent hand-held part 3.Such as figure
4, cutter hub 1 shown in fig. 5 includes cutting head 11, knife handle 12, inserting column 13, limiting slot 14 and rubber ring 15.The cutting head 11
Set on the top of the knife handle 12, the inserting column 13 is set at the center of 12 bottom of knife handle, and the limiting slot 14 opens up
In the side of 13 bottom of inserting column, the rubber ring 15 is sheathed on the outer wall of the inserting column 13.As shown in Fig. 2, Fig. 6,
The sleeve 2 includes sleeve body 21, shield 22 and the internal screw thread 23 set on 21 bottom interior wall of sleeve body, the shield
22 are set to the top of the sleeve body 21, wherein the shield 22 is in semi-circular shape, and are arranged at the top of shield 22
There is inclined baffler 24, the upper surface of the barrier version 24 is recessed.As shown in Figure 2 and Figure 3, the transparent hand-held part 3 is
Hollow cylinder, wherein the outer wall at 3 top of the transparent hand-held part is equipped with the extension 31 of annular, the outside of the extension 31 is set
There is external screw thread 32.As shown in Figure 4, Figure 5, the rotary shaft 4 includes rotation axis ontology 41, limited block 42, clamping ring 43 and is used for
The interface 44 being connected to motor, the interface 44 are set to the bottom of the rotation axis ontology 41, and the limited block 42 is set to
The top of rotation axis ontology 41, and match with the limiting slot 14, the clamping ring 43 is set to the rotation axis ontology 41
Top, and it is set in the outside of the limited block 42.As shown in figure 8, the cutter head 11 is polygonal starlike cutter head 111.It is described
The height of cutting head 11 is equal to the height of the shield 22.The rotary shaft 4, which is equipped with, is used to indicate 42 institute of limited block in place
The markings 33 set, and 14 opening direction of the limiting slot is directed toward the direction of the cutting head 11.The length of the cutter hub 1 is
32cm.The diameter of the sleeve 2 is 3.75mm or 4.3mm.The height of the clamping ring 43 is less than the height of the limited block 42.
The diameter of the inserting column 13 is equal to the internal diameter of the clamping ring 43.The rubber ring 15 with a thickness of 0.1 ~ 0.3mm.It is described anti-
The edge of shield 22 is equipped with the scraper of dentation.The diameter of the cutting head 11 is less than the diameter of the knife handle 12.
For the present invention before use, first screwing off sleeve 2 from transparent hand-held part 3, selection top is equipped with polygonal star topology
111 cutter hub 11, the 8 jiaos starlike shape radially splitted wherein polygonal starlike cutter head 111 is positive, 111 knot of cutting head of the structure
Structure is more stable, thicker suitable for ligamentum flavum and be difficult to the situation torn, and the cutting head 11 on cutter hub 1 and the knife handle 12 are one
Body structure installs cutter hub 1 and rotary shaft 4, during installation, the limiting slot 14 of 13 bottom of inserting column first with rotary shaft 4
The limited block 42 on top is aligned, and knife handle 12 is then pressed down on, due to being arranged with the rubber of 0.1 ~ 0.3mm thickness outside inserting column 13
Circle 15, therefore when pressing down on, since effect rubber circle 15 is squeezed into clamping ring 43, match clamping ring 43 with 13 interference of inserting column
Close connection, avoid cutter hub 1 loosen, influence surgical effect, cutter hub 1 after the installation is completed, sleeve 2 is trapped from upper in cutter hub 1
Outside, and by the internal screw thread 23 of 2 bottom of sleeve with the external screw thread 32 at the top of extension 31 it is threadedly coupled, and by electrosurgical
The output end of machine and 44 grafting of interface of 4 end of rotary shaft, complete the installation of Knife for stripping cable.Sleeve 2 is protruded into patient's vertebra,
Through the markings 33 in transparent hand-held part 3 observation rotary shaft 4, to confirm the signified direction of cutting head 11, subsequent start-up motor,
It drives cutter hub 1 to rotate by rotary shaft 4, scrapes ligamentum flavum in patient body, when cutting head 11 rotates, cutting head connects with ligamentum flavum
It touches and ligamentum flavum is driven to rotate, ligamentum flavum is involved in shield 22, and will be yellow by the cooperation of the scraper 25 at 22 edge of shield
Ligament is torn, and not only convenient for ligamentum flavum of tearing, but also is avoided that cutting head 11 is blocked by ligamentum flavum and is difficult to rotate, increases the difficulty of operation
Degree.The top and bottom of rotary shaft 4 is arranged with bearing 5, and cutter hub 1 is set in sleeve 2, therefore when motor rotation, transparent hand
Holding portion 3 and sleeve 2 will not rotate, can quick rotation damages patient in patient's vertebra to avoid sleeve 2.Simultaneously
Since the top of sleeve 2 is equipped with shield 22, and the top of shield 22 is equipped with baffler 24, therefore can be to avoid in cutting head
The nerve root of injured patients when 11 rotation, while when sleeve 2 protrudes into the vertebra of patient, inclined baffler 24 can will be refreshing
The other side for scraping range is guided to cutting head 11 through root, injured nerve root is avoided, since ligamentum flavum is irregular in vertebra
Shape, doctor can adjust the direction of protective cover 22, specify to realize in vertebra by operation transparent hand-held part 3 with moving sleeve 2
The ligamentum flavum in direction strikes off, and is equipped with the scraper 25 of dentation at the edge of protective cover 22, for increasing protective cover 22 and Huang Ren
The contact surface of band prevents sleeve 2 from rotating or sliding in vertebra, influences to scrape effect.
Ligamentum flavum Knife for stripping cable provided by the invention is described in detail above, the explanation of specific embodiment is only intended to
It facilitates the understanding of the method and its core concept of the invention.It should be pointed out that for those skilled in the art,
Without departing from the principles of the invention, can be with several improvements and modifications are made to the present invention, such as shape of the cutting head
It is not limited to the half of positive 8 jiaos of starriness, these improvements and modifications also fall within the scope of protection of the claims of the present invention.
Claims (9)
1. ligamentum flavum Knife for stripping cable, it is characterised in that: including cutter hub, sleeve, transparent hand-held part and rotary shaft；The top of the rotary shaft
Portion and bottom are arranged with bearing respectively, and the outer wall of the bearing is fixedly connected with the inner wall of the transparent hand-held part, the cutter hub
Bottom connect with the top side detachable of the rotary shaft, the sleeve is set in outside the cutter hub, and with it is described transparent hand-held
Portion is threadedly coupled；The cutter hub includes cutting head, knife handle, inserting column, limiting slot and rubber ring, and the cutting head is set to the knife
The top of handle, the inserting column are set at the center of the knife handle bottom, and the limiting slot is opened in the grafting column bottom
Side, the rubber ring sleeve are set to the outer wall of the inserting column；The sleeve include sleeve body, shield and be set to sleeve sheet
The internal screw thread of body bottom interior wall, the shield are set to the top of the sleeve body, wherein the shield is in semi-circular shape,
And inclined baffler is provided at the top of shield, the upper surface of the barrier version is recessed；The transparent hand-held part
For hollow cylinder, wherein the outer wall at the top of the transparent hand-held part is equipped with the extension of annular, the outside of the extension is equipped with
External screw thread；The rotary shaft includes rotation axis ontology, limited block, is clamped ring and the interface for being connected to motor, described to insert
Interface be set to the rotation axis ontology bottom, the limited block be set to rotation axis ontology top, and with the limiting slot phase
Matching, it is described to be clamped the top for being located on the rotation axis ontology, and it is set in the outside of the limited block.
2. ligamentum flavum Knife for stripping cable as described in claim 1, it is characterised in that: the cutting head is the dentation cutter head of semicircular ring.
3. ligamentum flavum Knife for stripping cable as described in claim 1, it is characterised in that: the shape of the cutter head is polygonal starlike knife
Head.
4. ligamentum flavum Knife for stripping cable as described in claim 1, it is characterised in that: the height of the cutting head is equal to the shield
Height.
5. ligamentum flavum Knife for stripping cable as described in claim 1, it is characterised in that: the rotary shaft is equipped with and is used to indicate limited block
The markings of position, and the limiting slot opening direction is directed toward the direction of the cutting head.
6. ligamentum flavum Knife for stripping cable as described in claim 1, it is characterised in that: the height of the clamping ring is less than the limited block
Height.
7. ligamentum flavum Knife for stripping cable as described in claim 1, it is characterised in that: the diameter of the inserting column is equal to the clamping ring
Internal diameter.
8. ligamentum flavum Knife for stripping cable as described in claim 1, it is characterised in that: the radial direction of the rubber ring interior annular and outer toroid
Distance is 0.1 ~ 0.3mm.
9. ligamentum flavum Knife for stripping cable as described in claim 1, it is characterised in that: the edge of the shield is equipped with scraping for dentation
Knife.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910099101.1A CN109717924A (en) | 2019-01-31 | 2019-01-31 | Ligamentum flavum Knife for stripping cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910099101.1A CN109717924A (en) | 2019-01-31 | 2019-01-31 | Ligamentum flavum Knife for stripping cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109717924A true CN109717924A (en) | 2019-05-07 |
Family
ID=66301007
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910099101.1A Pending CN109717924A (en) | 2019-01-31 | 2019-01-31 | Ligamentum flavum Knife for stripping cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109717924A (en) |
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| CN110090048A (en) * | 2019-05-30 | 2019-08-06 | 朱文婷 | A kind of ultrasonic osteotome bit |
| CN112137689A (en) * | 2020-09-28 | 2020-12-29 | 山东大学齐鲁医院 | Posterior longitudinal ligament device for anterior cervical surgery |
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