CN215306462U - Dura mater spinalis cutter - Google Patents
Dura mater spinalis cutter Download PDFInfo
- Publication number
- CN215306462U CN215306462U CN202120654581.6U CN202120654581U CN215306462U CN 215306462 U CN215306462 U CN 215306462U CN 202120654581 U CN202120654581 U CN 202120654581U CN 215306462 U CN215306462 U CN 215306462U
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- China
- Prior art keywords
- dura mater
- cutting
- angle
- edge part
- scissor
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- Expired - Fee Related
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- 210000001951 dura mater Anatomy 0.000 title claims abstract description 46
- 238000005452 bending Methods 0.000 claims abstract description 24
- 238000010008 shearing Methods 0.000 claims description 14
- 210000000278 spinal cord Anatomy 0.000 description 16
- 210000004204 blood vessel Anatomy 0.000 description 14
- 210000005036 nerve Anatomy 0.000 description 14
- 230000001681 protective effect Effects 0.000 description 9
- 210000001032 spinal nerve Anatomy 0.000 description 6
- 210000001519 tissue Anatomy 0.000 description 4
- 210000000576 arachnoid Anatomy 0.000 description 3
- 230000006378 damage Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 208000012260 Accidental injury Diseases 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000004064 dysfunction Effects 0.000 description 1
- 230000023597 hemostasis Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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- Surgical Instruments (AREA)
Abstract
The utility model provides a dura mater scissors which comprises a first scissors piece and a second scissors piece which are connected in a hinged mode, wherein the first scissors piece and the second scissors piece are both provided with a handheld part and a blade part; the handheld part is fixedly connected with the knife edge part; the knife edge part of the first cutting part is an upper edge part, the knife edge part of the second cutting part is a lower edge part, the knife back part opposite to the lower edge part is provided with a protection groove, and the upper edge part and the lower edge part are respectively formed into a bending angle with the corresponding handheld part.
Description
Technical Field
The utility model belongs to the technical field of medical instruments, and particularly relates to a dura mater spinalis cutter used in a microneurosurgery operation.
Background
With the development of the micro neurosurgery technology, after various intraspinal subdural operations requiring to open the dura mater are performed, the space required by the operation is narrow, and in the current operations, usually, after a small opening is cut on the dura mater, the top end of one shearing arm of the dura mater scissors is extended into the cut small opening, and then the handle of the dura mater scissors is pressed, so that two shearing arms provided with cutting edges are combined to cut off the dura mater, as shown in fig. 1, the top end of the shearing arm of the dura mater scissors used in the prior art is relatively sharp and sharp, and the pressure of the intraductal dura mater is high, so that the dura mater, spinal cord tissue or nerve root or blood vessel is easily damaged when the dura mater is opened, the spinal cord tissue or nerve root or blood vessel is damaged, bleeding is caused, and the visual field of the operation is blurred, or cause the nerve dysfunction, and simultaneously, the time and the labor are wasted for hemostasis, thereby increasing the risk of nerve function damage.
SUMMERY OF THE UTILITY MODEL
Aiming at the explanation of the background technology, the utility model provides a dura mater scissors which is suitable for a spinal canal operation environment with small bone window, narrow operation space and depth and can safely and quickly cut the dura mater.
In order to achieve the purpose, the utility model provides the following technical scheme:
a dura mater scissors comprises a first scissors piece and a second scissors piece which are connected in a hinged mode, wherein the first scissors piece and the second scissors piece are both provided with a handheld part and a knife edge part; the handheld part is fixedly connected with the knife edge part; the cutting edge part of the first cutting part is an upper edge part, the cutting edge part of the second cutting part is a lower edge part, a protection groove is formed in the back of the knife opposite to the lower edge part, and the upper edge part and the lower edge part are equally divided into bending angles formed by corresponding handheld parts.
In the above technical solution, the bending angle formed by the upper edge portion and the handheld portion is a bending angle a, the bending angle formed by the lower edge portion and the handheld portion is a bending angle B, and the angle of the bending angle a is the same as the angle of the bending angle B.
In the above technical solution, the angle range of the bending angle B is 100 degrees to 170 degrees.
In the technical scheme, the outer side edge of the protection groove is arc-shaped, and the blade of the lower blade part is higher than the plane of the protection groove.
In the above technical solution, the central angle range of the arc is: 110 to 180 degrees.
In the technical scheme, the front end of the protection groove is an edge which is blunt, the edge of the protection groove is slightly lower than the plane of the lower cutting edge, and the rear end of the protection groove is smoothly connected with the rear end of the lower cutting edge.
In the technical scheme, the knife edges of the first shearing piece and the second shearing piece are tangent,
in the above technical scheme, the outer side of the protection groove is a smooth surface.
In the technical scheme, the hinge mode adopts a detachable hinge shaft for hinge.
In the above technical solution, at least one of the blade portions of the first and/or second cutting members is provided with a scale.
In the above technical scheme, the handheld portion of the first piece of cutting and the handheld portion of the second piece of cutting all set up anti-skidding structure.
According to the utility model, the protective groove at the front end of the scissors is used for pushing away the arachnoid, spinal cord, nerves and blood vessels below the dura mater to prevent the arachnoid, spinal cord, nerves and blood vessels below the dura mater from being punctured by the second cutting piece which firstly extends into the cut subdural orifice, and the protective groove also prevents the back of the knife edge of the scissors from puncturing the spinal cord, nerves and blood vessels and also prevents the free nerves and blood vessels from entering the knife edge to cause mistaken cutting when the dura mater is cut, so that the spinal cord, nerves and blood vessels are well prevented from being damaged, and the dura mater is cut quickly and safely; carry out the arc design to scissors body both ends, the operation of being convenient for, no field of vision shelters from, makes its operation more convenient, and is also safer, can make the dura mater of spine cut process safer, rapid, convenient operation, look directly, especially need not be aided with other apparatus, has simple structure, and practical function is good, can effectively shorten operation time, improves operation efficiency.
Drawings
In order to more clearly illustrate the embodiments of the patent of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the patent of the present invention, and other drawings can be obtained by those skilled in the art without inventive exercise.
Fig. 1 is a schematic structural diagram of the prior art of the present invention.
Fig. 2 is a schematic view of the overall structure of the present invention.
In the figure: 1 a first cutting member, 11 an upper blade part, 2 a second cutting member, 21 a bending angle B, 22 a protective groove, 23 a lower blade part, 3 a handheld part, 4 a connecting arm and 5 a hinged shaft.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given in the present patent application without inventive step, shall fall within the scope of protection of the present patent application.
According to fig. 2, the dura mater of embodiment shows cuts ware, include the first piece and the second piece of cutting through articulated mode connection, the material is stainless steel for the first piece and the second of cutting, but articulated mode adopts split hinge shaft to articulate, so that the dismantlement and the installation of the first piece and the second of cutting, the maintenance and the repair of the dura mater of cutting the ware are convenient for, first piece and the second of cutting all can integrated into one piece when making, in order to simplify first piece and the second of cutting a processing technology, reduce the processing degree of difficulty that first piece and the second of cutting cut, and then reduce the processing cost that first piece and the second of cutting cut.
The first shearing part is provided with a handheld part and a knife edge part which are fixedly connected through a connecting arm, the knife edge part of the first shearing part is an upper edge part, the upper edge part is in a bent shape, a bending angle A is formed by the upper edge part and the handheld part, and the upper edge part is provided with a cutter; similarly, the second shearing part is provided with a handheld part and a knife edge part which are fixedly connected, the knife edge part of the second shearing part is a lower edge part, the knife back part opposite to the lower edge part is provided with a protective groove, the lower edge part and the handheld part form a bending angle B, the angle of the bending angle A is the same as that of the bending angle B, the angle range of the bending angle B is 100-170 degrees, and the second shearing part can better stretch into the operation part due to the design of the bending angle B; the outside limit of protection groove is convex, and the central angle scope of circular arc is: the outer side surface of the protective groove is a smooth surface, the height of the cutting edge of the cutter at the lower edge part is higher than the plane height of the protective groove, and the front end of the protective groove is an edge with a blunt circle, so that the existing dura mater scissors are improved, and the spinal cord, spinal nerves, blood vessels and the like can be reduced or prevented from being damaged by the sharp point of the cutting edge part of the second scissors to a certain extent; the protection groove rear end meets with lower blade rear end smoothness, the cutter that the upper blade set up is tangent with the cutter that the lower blade set up, the cutter through first piece and the second piece of cutting is cut apart in the cooperation of operation area and is cut apart the dura mater, both can realize going on smoothly of operation, can reduce again to nerve, the damage of spinal cord and blood vessel, as preferred embodiment, the knife blade portion of first piece and/or the second piece of cutting apart sets up the scale wherein at least, set up the scale or both sides all set up the scale like the knife blade one side, the aim at that sets up the scale provides the scale foundation for clinician cuts apart the dura mater in the operation area, the clinician's of being convenient for operation.
As preferred embodiment, the handheld portion of the first piece of cutting and the handheld portion of the second piece of cutting all set up anti-skidding structure, through anti-skidding structure to increase the handheld portion of the first piece of cutting and the handheld portion frictional force of the second piece of cutting, with reduce clinician's maloperation, can improve the security that dura mater cutter used to a certain extent, anti-skidding structure can adopt and cooperate for anti-skidding recess or anti-skidding arch.
When the spinal cord cutting device is used, after a small opening of a dura mater is cut in an operation, the second cutting piece extends into the cut small opening, the end head with the protection groove enters the small opening, the outer side surface of the protection groove is a smooth surface, so that arachnoid, spinal cord or nerve or blood vessel below the dura mater can be pushed away conveniently, the spinal cord, the nerve or the blood vessel is prevented from being punctured or mistakenly cut, the edge protection groove with the blunt circle at the front end of the protection groove extends into the dura mater, the spinal cord, the nerve or the blood vessel can be well prevented from being damaged, and the dura mater can be cut quickly and safely.
When the dura mater cutting protective groove extends into the dura mater in advance, the dura mater is separated from the spinal cord or the nerve root, the damage to the spinal cord or the nerve root caused by too narrow knife back of the lower blade part is avoided, the nerve root is prevented from swinging or shifting to enter the space between the upper blade and the lower blade, the nerve root is cut by mistake when the dura mater is cut, the front end of the scissors and the cutting edge of the scissors are separated from the spinal cord tissue, the nerve and the blood vessel, the accidental injury of the vertical surface of the scissors and the knife edge to the spinal cord tissue, the nerve root and the blood vessel is avoided, the protective effect is achieved, and the dura mater can be cut rapidly. The arc handle design makes whole cutting edge all be direct-view.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and shall be covered by the protection scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the protection scope of the claims.
Claims (10)
1. A dura mater scissors, characterized in that: the cutting tool comprises a first cutting part and a second cutting part which are connected in a hinged mode, wherein the first cutting part and the second cutting part are both provided with a handheld part and a blade part; the handheld part is fixedly connected with the knife edge part; the cutting edge part of the first cutting part is an upper edge part, the cutting edge part of the second cutting part is a lower edge part, a protection groove is formed in the back of the knife opposite to the lower edge part, and the upper edge part and the lower edge part are equally divided into bending angles formed by corresponding handheld parts.
2. The dura mater spinalis scissor of claim 1, wherein: the angle of bending that upper blade portion and handheld portion formed is angle of bending A, and the angle of bending that lower blade portion and handheld portion formed is angle of bending B, and angle of bending A is the same with angle of bending B angle.
3. The dura mater spinalis scissor of claim 2, wherein: the angle range of the bending angle B is 100 degrees to 170 degrees.
4. The dura mater spinalis scissor of claim 2, wherein: the outer side edge of the protection groove is arc-shaped, and the blade of the lower blade part is higher than the plane of the protection groove.
5. The dura mater scissor according to claim 4, wherein: the central angle range of the circular arc is as follows: 110 to 180 degrees.
6. The dura mater scissor according to claim 4, wherein: the front end of the protection groove is an obtuse edge, the edge of the protection groove is slightly lower than the plane of the lower cutting edge, and the rear end of the protection groove is smoothly connected with the rear end of the lower cutting edge.
7. The dura mater scissor according to claim 6, wherein: the first shearing piece and the second shearing piece are tangent to each other at the blade part.
8. The dura mater spinalis scissor of claim 7, wherein: the outer side of the protection groove is a smooth surface.
9. The dura mater spinalis scissor of claim 8, wherein: at least one surface of the blade part of the first shearing part and/or the second shearing part is provided with scales.
10. The dura mater spinalis scissor of claim 9, wherein: the handheld portion of first piece and the handheld portion of second piece of cutting all set up anti-skidding structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120654581.6U CN215306462U (en) | 2021-03-31 | 2021-03-31 | Dura mater spinalis cutter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120654581.6U CN215306462U (en) | 2021-03-31 | 2021-03-31 | Dura mater spinalis cutter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215306462U true CN215306462U (en) | 2021-12-28 |
Family
ID=79591964
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120654581.6U Expired - Fee Related CN215306462U (en) | 2021-03-31 | 2021-03-31 | Dura mater spinalis cutter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215306462U (en) |
-
2021
- 2021-03-31 CN CN202120654581.6U patent/CN215306462U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20211228 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |