CN219921161U - Dura mater cutter - Google Patents
Dura mater cutter Download PDFInfo
- Publication number
- CN219921161U CN219921161U CN202320598087.1U CN202320598087U CN219921161U CN 219921161 U CN219921161 U CN 219921161U CN 202320598087 U CN202320598087 U CN 202320598087U CN 219921161 U CN219921161 U CN 219921161U
- Authority
- CN
- China
- Prior art keywords
- epidural
- protective sheath
- blade
- handle
- distal end
- 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.)
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Links
- 210000001951 dura mater Anatomy 0.000 title description 22
- 230000001681 protective effect Effects 0.000 claims abstract description 56
- 239000000463 material Substances 0.000 claims description 5
- 239000004033 plastic Substances 0.000 claims description 5
- 229920003023 plastic Polymers 0.000 claims description 5
- 239000013013 elastic material Substances 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 6
- 230000008569 process Effects 0.000 abstract description 5
- 210000005013 brain tissue Anatomy 0.000 description 8
- 241001269524 Dura Species 0.000 description 4
- 210000000278 spinal cord Anatomy 0.000 description 3
- 238000001746 injection moulding Methods 0.000 description 2
- 229920002379 silicone rubber Polymers 0.000 description 2
- 239000004945 silicone rubber Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000004433 Thermoplastic polyurethane Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 210000000576 arachnoid Anatomy 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000003902 lesion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920003225 polyurethane elastomer Polymers 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 1
Abstract
The utility model discloses an epidural incision device, which comprises: a handle; a protective sheath, the proximal end of which is connected with the distal end of the handle, the protective sheath having upper and lower surfaces disposed opposite to each other in a thickness direction thereof; and a blade connected with the distal end of the handle, wherein the back of the blade is fixed on the upper surface of the protective sheath, and the cutting edge of the blade extends to the upper surface of the protective sheath. According to the epidural incision device disclosed by the utility model, an operator can hold the handle to operate the protective sheath to extend from the opening after cutting a smaller opening in the epidural, and the epidural can slide to the blade edge of the blade along the upper surface of the protective sheath after the protective sheath extends into a part of the epidural incision device, so that the blade edge of the blade can cut the epidural along with forward pushing of the protective sheath, and the tissue below the epidural can be protected through the protective sheath in the whole process, so that the epidural incision device disclosed by the utility model can be used for simplifying the operation of the epidural incision process, and is safer and more efficient.
Description
Technical Field
The utility model relates to the technical field of clinical surgical instruments, in particular to an epidural incision device.
Background
There is no corresponding surgical instrument for incising dura mater (dura mater or dura mater) in the neurosurgery at present, for example, incising dura mater is performed by using a sharp knife after the dura mater is lifted by an empty needle, exposing the lower arachnoid mater and brain tissue by using coarser dura scissors for shearing and exposing, and the brain tissue cortex is often damaged by using the coarser dura scissors in the process, especially when the brain tissue tension is higher, the brain tissue is easy to bulge, and thus the brain tissue is more easy to damage. In addition, the tissue is damaged when the dura mater is incised, which is not to be damaged.
Disclosure of Invention
The utility model aims to provide an epidural cutter to solve the technical problems that the prior art is easy to damage internal tissues when using thick epidural scissors to cut the epidural, and the internal tissues are easy to damage due to high operation difficulty and unskilled operation.
The above object of the present utility model can be achieved by the following technical solutions:
the present utility model provides an epidural cutter comprising: a handle; a protective sheath, the proximal end of which is connected with the distal end of the handle, the protective sheath having upper and lower surfaces disposed opposite to each other in a thickness direction thereof; and a blade connected with the distal end of the handle, wherein the back of the blade is fixed on the upper surface of the protective sheath, and the cutting edge of the blade extends to the upper surface of the protective sheath.
In an embodiment of the present utility model, the distal end of the protective sheath has a convex arc shape, and the width of the distal end of the protective sheath is gradually reduced in a direction away from the handle.
In an embodiment of the present utility model, the width of the widest part of the distal end of the protective sheath is 3.5mm to 4.5mm.
In an embodiment of the present utility model, the protective sheath further has a side surface, and the side surface is in smooth transition connection with the upper surface and the lower surface.
In an embodiment of the utility model, the protection sheath is provided with a front protection part and a rear protection part which are connected, the rear protection part is connected with the distal end of the handle and extends along the axial direction of the handle, and an included angle is formed between the rear protection part and the front protection part.
In an embodiment of the present utility model, the included angle is 110 degrees to 120 degrees.
In an embodiment of the present utility model, the blade edge of the blade has a concave arc shape.
In an embodiment of the present utility model, the back of the blade is embedded in the upper surface of the protective sheath.
In the embodiment of the utility model, the blade is provided with a clamping groove, and the far end of the handle is provided with a clamping block matched with the clamping groove.
In an embodiment of the utility model, the material of the protective sheath is medical plastic or elastic material; the handle is made of medical plastic.
The utility model has the characteristics and advantages that:
according to the epidural incision device disclosed by the utility model, the protection sheath and the blade are arranged at the distal end of the handle, the back of the blade is fixed on the upper surface of the protection sheath, and the blade edge of the blade extends to the upper surface of the protection sheath, so that an operator can hold the handle to operate the protection sheath to extend into the opening after cutting a smaller opening in the epidural, and after the protection sheath extends into a part of the protection sheath, the epidural can slide to the blade edge of the blade along the upper surface of the protection sheath, so that the blade edge of the blade can cut the epidural along with forward pushing of the protection sheath, and the whole process can protect tissues below the epidural through the protection sheath.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a side view of an epidural cutter according to the utility model.
FIG. 2 is an enlarged view of a portion of the epidural cutter according to the utility model.
Fig. 3 is a top view of the protective sheath of the present utility model.
Fig. 4 is a cross-sectional view of a protective sheath in accordance with the present utility model.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
As shown in fig. 1, the present utility model provides an epidural cutter comprising: a handle 1; a protective sheath 3, the proximal end of which is connected to the distal end of the handle 1, the protective sheath 3 having an upper surface 33 and a lower surface 34 disposed opposite to each other in the thickness direction X thereof; a blade 2 connected to the distal end of the handle 1, and a back 22 of the blade 2 is fixed to an upper surface 33 of the protective sheath 3, and a blade edge 21 of the blade 2 extends to the upper surface 33 of the protective sheath 3. Wherein, for convenience of description, the end of each component near the operator and far from the patient is defined as the proximal end of each component, and the end far from the operator and near the patient is defined as the distal end of each component.
According to the epidural cutter disclosed by the utility model, the protection sheath 3 and the blade 2 are arranged at the distal end of the handle 1, the back 22 of the blade 2 is fixed on the upper surface 33 of the protection sheath 3, and the blade edge 21 of the blade 2 extends to the upper surface 33 of the protection sheath 3, so that an operator can hold the handle 1 to operate the protection sheath 3 to extend from the opening after the epidural cutting of a small opening, along with the extension of the protection sheath 3, the epidural can slide to the blade edge 21 of the blade 2 along the upper surface 33 of the protection sheath 3, and then the blade edge 21 of the blade 2 cuts the epidural along with the forward pushing forward of the protection sheath 3, and the tissue below the epidural can be protected through the protection sheath 3 in the whole process.
The operation procedure of using the epidural cutter of the utility model to cut the dura mater is as follows: the dura/dura mater is first incised with a sharp knife to an opening of about 5mm in length, the distal end 36 of the protective sheath 3 of the dura cutter is slowly placed under the dura mater from the opening on the dura mater, and then the dura mater is gently lifted and pushed forward with the distal end 36 of the protective sheath 3 so that the cutting edge 21 of the blade 2 is made to incise the dura mater/dura mater, thereby exposing the lesion on the premise that the brain tissue or spinal cord under it is sufficiently protected by the protective sheath 3.
Specifically, as shown in fig. 2, the junction of the back 22 and the edge 21 of the blade 2 forms a nose 24. As shown in connection with fig. 3, the length L of the distal end 36 of the protective sheath 3 extending in a direction F away from the handle 1 (i.e. the pushing direction of the epidural cutter) relative to the tip 24 should be more than 2mm, preferably 3mm, ensuring that the tip 24 does not come into direct contact with the tissue when the protective sheath 3 is inserted from the opening in the epidural.
In the embodiment of the utility model, the epidural incision device is a disposable medical tool, and the materials of the protective sheath 3 and the handle 1 are all medical plastics, so that the epidural incision device can be used for disinfection and is beneficial to saving the cost. Specifically, the blade 2 is placed in the injection molding cavity of the protection sheath 3 and the handle 1 by insert molding, so that the back 22 of the blade 2 is embedded in the upper surface 33 of the protection sheath 3 after the injection molding of the protection sheath 3 and the handle 1, the manufacturing is simple and the combination between the blade 2 and the handle 1 and the protection sheath 3 is more stable. In other embodiments of the present utility model, the material of the protective sheath 3 may be an elastic material such as silicone rubber, thermoplastic polyurethane elastomer, rubber, or silicone rubber. The material of the handle 1 may also be stainless steel.
As shown in fig. 2, in the embodiment of the present utility model, the protection sheath 3 has a front protection portion 31 and a rear protection portion 32 connected to each other, the rear protection portion 32 is connected to the distal end of the handle 1 and extends along the axial direction Z of the handle 1, and an angle θ is formed between the rear protection portion 32 and the front protection portion 31. The included angle θ is greater than 90 degrees, preferably 110 degrees to 120 degrees. By providing the front protection portion 31 and the rear protection portion 32 at a certain angle, the operation is facilitated, and simultaneously, the front protection portion 31 is utilized to protect the tissues below the portion to be cut and the portion being cut of the dura mater, and the rear protection portion 32 is utilized to protect the tissues of the cut portion of the rear dura mater, so that the tissues at the rear are prevented from being directly contacted with the blade 2 to be damaged after being bulged from the incision of the dura mater.
Specifically, the proximal end of the blade 21 is located forward of the rear guard 32, and the distal end of the blade 21 extends to the upper surface 331 of the front guard 31. The back 22 of the blade 2 has a back portion 222 and a front portion 221, the back portion 222 being fixed to the upper surface 332 of the rear guard portion 32, and the front portion 221 being fixed to the upper surface 331 of the front guard portion 31.
As shown in fig. 3, the distal end 36 of the protective sheath 3 (i.e., the distal end of the anterior guard 31) is convexly curved, thereby ensuring that the distal end 36 of the protective sheath 3 does not lose underlying brain tissue or spinal cord when placed from the epidural opening. The width W of the distal end 36 of the protective sheath 3 is gradually reduced in a direction F away from the handle 1 (i.e., the pushing direction of the epidural cutter), so that the distal end 36 of the protective sheath 3 can be more smoothly placed under the dura mater from a smaller opening in the dura mater to reduce pulling to the opening. Specifically, the width W at the widest part of the distal end of the protective sheath 3 is 3.5mm to 4.5mm, preferably 4mm. The outer contour of the front guard 31 is generally elliptical.
As shown in fig. 3 and 4, the protective sheath 3 further has a side 35, and the side 35 is smoothly connected with the upper surface 33 and the lower surface 34, so that it is ensured that the edge portion of the protective sheath 3 does not damage brain tissue or spinal cord. In some embodiments of the present utility model, as shown in fig. 2, the side surface 35 is a circular arc surface with a semicircular cross section, and the lower surface 34 of the protective sheath 3 includes the lower surface 342 of the rear protective portion 32 and the lower surface 341 of the front protective portion 31, which are both substantially convex circular arc surfaces. The upper surface 33 of the protective sheath 3 includes an upper surface 332 of the rear protective portion 32 and an upper surface 331 of the front protective portion 31, each of which is substantially planar. In other embodiments of the utility model, the cross-sectional shape of the protective sheath 3 is generally elliptical, rounded rectangular or kidney-shaped.
As shown in fig. 2, in the embodiment of the present utility model, the cutting edge 21 of the blade 2 has a concave arc shape, so that the cutting edge 21 of the blade 2 can better cut the dura mater in a clockwise direction when the dura mater cutter is pushed forward. Specifically, from the distal end of the blade 21 toward the proximal end of the blade 21, the angle between the tangent line of the blade 21 and the front back 221 is gradually increased, and the angle between the tangent line at the distal end of the blade 21 and the front back 221 is substantially 10 degrees to 30 degrees, and the angle between the tangent line at the proximal end of the blade 21 and the front back 221 is substantially 75 degrees to 90 degrees.
As shown in fig. 2, the blade 2 is provided with a clamping groove 23, and the distal end of the handle 1 is provided with a clamping block 11 matched with the clamping groove 23. In some embodiments of the present utility model, the clamping block 11 is formed in the clamping groove 23 after the handle 1 is injection molded. In other embodiments of the present utility model, the handle 1 and the blade 2 are detachably connected by the clamping block 11 and the clamping groove 23 which are in clamping fit.
The foregoing is merely a few embodiments of the present utility model and those skilled in the art may make various modifications or alterations to the embodiments of the present utility model in light of the disclosure herein without departing from the spirit and scope of the utility model.
Claims (10)
1. An epidural cutter, comprising:
a handle;
a protective sheath, the proximal end of which is connected with the distal end of the handle, the protective sheath having upper and lower surfaces disposed opposite to each other in a thickness direction thereof;
and a blade connected with the distal end of the handle, wherein the back of the blade is fixed on the upper surface of the protective sheath, and the cutting edge of the blade extends to the upper surface of the protective sheath.
2. The epidural cutter according to claim 1, wherein,
the distal end of the protective sheath is in a protruding arc shape, and the width of the distal end of the protective sheath is gradually reduced towards a direction away from the handle.
3. The epidural cutter according to claim 2, wherein,
the width of the widest part of the distal end of the protective sheath is 3.5 mm-4.5 mm.
4. The epidural cutter according to claim 1, wherein,
the protective sheath is also provided with a side surface which is in smooth transition connection with the upper surface and the lower surface.
5. The epidural cutter according to claim 1, wherein,
the protection sheath has the preceding protection portion and the back protection portion that are connected, back protection portion with the distal end of handle is connected and follows the axial extension setting of handle, back protection portion with have the contained angle between the preceding protection portion.
6. The epidural cutter of claim 5, wherein,
the included angle is 110 degrees to 120 degrees.
7. The epidural cutter according to claim 1, wherein,
the cutting edge of the blade is in a concave arc shape.
8. The epidural cutter according to claim 1, wherein,
the back of the blade is embedded into the upper surface of the protective sheath.
9. The epidural cutter according to claim 1, wherein,
the blade is provided with a clamping groove, and a clamping block matched with the clamping groove is arranged at the far end of the handle.
10. The epidural cutter according to claim 1, wherein,
the material of the protective sheath is medical plastic or elastic material; the handle is made of medical plastic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320598087.1U CN219921161U (en) | 2023-03-23 | 2023-03-23 | Dura mater cutter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320598087.1U CN219921161U (en) | 2023-03-23 | 2023-03-23 | Dura mater cutter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219921161U true CN219921161U (en) | 2023-10-31 |
Family
ID=88504366
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320598087.1U Active CN219921161U (en) | 2023-03-23 | 2023-03-23 | Dura mater cutter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219921161U (en) |
-
2023
- 2023-03-23 CN CN202320598087.1U patent/CN219921161U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |