CN219921161U - durotomy - Google Patents

Abstract

The utility model discloses a duratotomy, which includes: a handle; a protective sheath, the proximal end of which is connected to the distal end of the handle; the protective sheath has an upper surface and a lower surface arranged oppositely in its thickness direction. surface; a blade, which is connected to the distal end of the handle, the back of the blade is fixed to the upper surface of the protective sheath, and the blade edge of the blade extends to the upper surface of the protective sheath. The duratomy device of this utility model enables the operator to first cut a small opening in the dura mater, and then use the handle to operate the protective sheath to first extend it through the opening. As the protective sheath extends into part of the dura mater, the dura mater is removed. It can slide along the upper surface of the protective sheath to the blade edge of the blade, so that the blade edge can cut the dura mater as the protective sheath is pushed forward. The entire process can be carried out through the protective sheath on the tissue below the dura mater. Therefore, the dura mater incision device of the present invention can make the operation of the dura mater incision process simpler, safer and more efficient.

Description

durotomy

Technical field

The utility model relates to the technical field of clinical surgical instruments, and in particular, relates to a durotomy device.

Background technique

Currently, there are no corresponding surgical instruments for incision of the dura mater (dura mater or dura mater) in neurosurgery. For example, to incise the dura mater, the dura mater is lifted up with a hollow needle and then cut open with a sharp knife to expose the arachnoid mater and brain tissue below. Then use thicker dural scissors to cut open and expose. During this process, using thick dural scissors often damages the brain tissue cortex. Especially when the tension of the brain tissue is high, the brain tissue is easy to bulge and is therefore more susceptible to damage. In addition, unskilled operation may also damage internal tissues that should not be damaged during duratomy.

Utility model content

The purpose of this utility model is to provide a dura mater incision device to solve the problem that the current use of thick dura mater scissors to incise the dura mater is easy to damage the internal tissue, and due to the difficulty of operation, it is also easy to cause internal tissue damage due to unskilled operation. Impaired technical issues.

The above objects of the present invention can be achieved by adopting the following technical solutions:

The utility model provides a duratomy device, which includes: a handle; a protective sheath, the proximal end of which is connected to the distal end of the handle; the protective sheath has an upper surface and a lower surface arranged oppositely in its thickness direction. ; A blade, which is connected to the distal end of the handle, and the back of the blade is fixed to the upper surface of the protective sheath, and the edge of the blade extends to the upper surface of the protective sheath.

In an embodiment of the present invention, the distal end of the protective sheath is in 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 invention, the width of the widest part of the distal end of the protective sheath is 3.5 mm to 4.5 mm.

In an embodiment of the present invention, the protective sheath also has a side surface, and the side surface is connected to the upper surface and the lower surface in a smooth transition.

In an embodiment of the present invention, the protective sheath has a connected front protective part and a rear protective part, and the rear protective part is connected to the distal end of the handle and extends along the axial direction of the handle, and the There is an included angle between the rear protective part and the front protective part.

In the embodiment of the present invention, the included angle is 110 degrees to 120 degrees.

In an embodiment of the present invention, the blade of the blade is in a concave arc shape.

In an embodiment of the present invention, the back of the blade is embedded in the upper surface of the protective sheath.

In an embodiment of the present invention, the blade is provided with a clamping slot, and the distal end of the handle is provided with a clamping block that matches the clamping slot.

In an embodiment of the present invention, the material of the protective sheath is medical plastic or elastic material; the material of the handle is medical plastic.

The features and advantages of this utility model are:

The duratomy of the present invention installs the protective sheath and the blade on the distal end of the handle, and the back of the blade is fixed on the upper surface of the protective sheath, and the blade edge of the blade extends to the upper surface of the protective sheath, allowing the operator to first After cutting a small opening in the dura mater, you can hold the handle to operate the protective sheath and extend it through the opening. As the protective sheath extends partially, the dura mater can slide along the upper surface of the protective sheath to the edge of the blade. position, so that the blade edge of the blade can incise the dura mater as the protective sheath is pushed forward. The entire process can protect the tissue under the dura mater through the protective sheath. Therefore, the dura mater of the present invention can Make the dura mater incision process simpler, safer and more efficient.

Description of the drawings

In order to explain the technical solutions in the embodiments of the present utility model more clearly, the drawings needed to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some implementations of the utility model. For example, for those of ordinary skill in the art, other drawings can be obtained based on these drawings without exerting creative efforts.

Figure 1 is a side view of the durotomy device of the present utility model.

Figure 2 is a partial enlarged view of the durotomy device of the present utility model.

Figure 3 is a top view of the protective sheath of the present invention.

Figure 4 is a cross-sectional view of the protective sheath of the present invention.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only part of the embodiments of the present utility model, not all implementations. example. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present utility model.

As shown in Figure 1, the present utility model provides a durotomy device, which includes: a handle 1; a protective sheath 3, the proximal end of which is connected to the distal end of the handle 1, and the protective sheath 3 has opposite ends in its thickness direction X. The upper surface 33 and the lower surface 34 are provided; the blade 2 is connected to the distal end of the handle 1, and the back 22 of the blade 2 is fixed to the upper surface 33 of the protective sheath 3, and the blade 21 of the blade 2 extends to the upper surface of the protective sheath 3 surface33. For convenience of description, the end of each component close to the operator and away from the patient is defined as the proximal end of each component, and the end away from the operator and close to the patient is defined as the distal end of each component.

The durotomy of the present utility model has the protective sheath 3 and the blade 2 arranged at the distal end of the handle 1, and the blade back 22 of the blade 2 is fixed on the upper surface 33 of the protective sheath 3, and the blade 21 of the blade 2 extends to the protective sheath 3. The upper surface 33 of the sheath 3 allows the operator to first cut a smaller opening in the dura mater, and then hold the handle 1 to operate the protective sheath 3 and extend it from the opening. As the protective sheath 3 extends, the dura mater will be opened. It can slide along the upper surface 33 of the protective sheath 3 to the blade 21 of the blade 2, so that the blade 21 of the blade 2 can cut the dura mater as the protective sheath 3 is pushed forward, and the whole process can pass through the protective sheath 3. The tissue under the dura mater is protected. Therefore, the dura mater incision device of the present invention can make the dura mater incision process simpler, safer and more efficient.

The operation process of using the durotomy device of the present invention to cut the dura mater is as follows: first use a sharp knife to cut the dura mater/dural spinal mater into an opening with a length of about 5 mm, and then remove the distal end of the protective sheath 3 of the durotomy device. The end 36 is slowly inserted into the lower part of the dura mater from the opening on the dura mater, and then the distal end 36 of the protective sheath 3 is used to gently lift the dura mater and push it forward, so that the blade 21 of the blade 2 cuts the dura mater/hard mater smoothly. Meninges, thereby exposing the lesion site on the premise that the protective sheath 3 fully protects the underlying brain tissue or spinal cord.

Specifically, as shown in FIG. 2 , the connection point between the blade back 22 and the blade edge 21 of the blade 2 forms a blade tip 24 . As shown in FIG. 3 , the length L of the distal end 36 of the protective sheath 3 extending in the direction F away from the handle 1 (that is, the pushing direction of the durotomy) relative to the blade tip 24 should be greater than 2 mm, preferably 3 mm, to ensure protection. When the sheath 3 extends into the opening on the dura mater, the blade tip 24 will not directly contact the tissue.

In the embodiment of the present invention, the durotomy is a disposable medical tool, and the materials of the protective sheath 3 and the handle 1 are both medical plastics, which can be used for sterilization and are conducive to cost saving. Specifically, the blade 2 is placed in the injection molding cavity of the protective sheath 3 and the handle 1 through embedded injection molding, so that the back 22 of the blade 2 is embedded in the upper surface 33 of the protective sheath 3 after the protective sheath 3 and the handle 1 are injection molded, which is simple to manufacture. And the combination between the blade 2, the handle 1 and the protective sheath 3 is more stable. In other embodiments of the present invention, the material of the protective sheath 3 can also be elastic materials such as silicone, thermoplastic polyurethane elastomer, rubber, and silicone rubber. The material of the handle 1 can also be stainless steel.

As shown in Figure 2, in the embodiment of the present invention, the protective sheath 3 has a connected front protective part 31 and a rear protective part 32. The rear protective part 32 is connected to the distal end of the handle 1 and extends along the axial direction Z of the handle 1. Extended, there is an included angle θ between the rear protection part 32 and the front protection part 31 . The included angle θ is greater than 90 degrees, preferably 110 to 120 degrees. By arranging the front protective part 31 and the rear protective part 32 at a certain angle, while facilitating operation, the front protective part 31 is used to protect the tissue below the part of the dura mater to be cut and is being cut, and the rear protective part 32 is used to protect the dura mater. The tissue at the cut part of the rear dura mater is protected to prevent the rear tissue from being damaged by direct contact with the blade 2 after protruding from the incision of the dura mater.

Specifically, the proximal end of the blade 21 is located in front of the rear protective part 32 , and the distal end of the blade 21 extends to the upper surface 331 of the front protective part 31 . The blade back 22 of the blade 2 has a back back 222 and a front back 221. The back back 222 is fixed on the upper surface 332 of the rear protective part 32, and the front back 221 is fixed on the upper surface 331 of the front protective part 31.

As shown in FIG. 3 , the distal end 36 of the protective sheath 3 (that is, the distal end of the front protective portion 31 ) is in a convex arc shape, thereby ensuring that the distal end 36 of the protective sheath 3 cannot be inserted through the opening of the dura mater. There can be loss of underlying brain tissue or spinal cord. The width W of the distal end 36 of the protective sheath 3 is gradually reduced toward the direction F away from the handle 1 (that is, the pushing direction of the durotomy), so that the distal end 36 of the protective sheath 3 can be smaller from the dura mater. The opening can be placed under the dura mater more smoothly and reduce the pulling on the opening. Specifically, the width W at the widest point of the distal end of the protective sheath 3 is 3.5 mm to 4.5 mm, preferably 4 mm. The outer contour of the front protection part 31 is generally oval.

As shown in Figures 3 and 4, the protective sheath 3 also has a side 35, which is smoothly transitionally connected to the upper surface 33 and the lower surface 34, thereby ensuring that the edge of the protective sheath 3 will not cause damage to brain tissue or spinal cord. As shown in FIG. 2 , in some embodiments of the present invention, the side surface 35 is generally in the shape of an arc surface with a semicircular cross-section. The lower surface 34 of the protective sheath 3 includes the lower surface 342 of the rear protective part 32 and the front protective part. The lower surface 341 of the portion 31 is generally in the shape of a convex arc surface. The upper surface 33 of the protective sheath 3 includes the upper surface 332 of the rear protective part 32 and the upper surface 331 of the front protective part 31 , both of which are substantially flat. In other embodiments of the present invention, the cross-section shape of the protective sheath 3 is generally an oval, a rounded rectangle or a waist.

As shown in Figure 2, in the embodiment of the present invention, the blade 21 of the blade 2 is in a concave arc shape, so that when the duratomy is pushed forward, the blade 21 of the blade 2 can better cut the dura mater. Cut. Specifically, from the distal end of the blade 21 to the proximal end of the blade 21, the angle between the tangent of the blade 21 and the front back 221 is gradually increased, and the angle between the tangent at the distal end of the blade 21 and the front back 221 is gradually increased. The included angle is generally 10 degrees to 30 degrees, and the included angle between the tangent line at the proximal end of the blade 21 and the front back 221 is generally 75 degrees to 90 degrees.

As shown in FIG. 2 , the blade 2 is provided with a clamping slot 23 , and the distal end of the handle 1 is provided with a clamping block 11 that matches the clamping slot 23 . In some embodiments of the present invention, after the handle 1 is injection molded, the clamping block 11 is formed in the clamping groove 23 . In other embodiments of the present invention, the handle 1 and the blade 2 are detachably connected through the snap-fitting block 11 and the snap slot 23 .

The above are only a few embodiments of the present utility model. Those skilled in the art can make various changes or modifications to the embodiments of the present utility model based on the disclosure of the application documents without departing from the spirit and scope of the present utility model.

Claims (10)

1. A durotomy device, characterized in that it includes: handle; a protective sheath, the proximal end of which is connected to the distal end of the handle; the protective sheath has an upper surface and a lower surface arranged oppositely in its thickness direction; A blade is connected to the distal end of the handle, the back of the blade is fixed to the upper surface of the protective sheath, and the edge of the blade extends to the upper surface of the protective sheath. 2. The durotomy device according to claim 1, characterized in that, The distal end of the protective sheath is in a convex arc shape, and the width of the distal end of the protective sheath is gradually reduced toward the direction away from the handle. 3. The durotomy device according to claim 2, characterized in that, The width of the widest part of the distal end of the protective sheath is 3.5 mm to 4.5 mm. 4. The durotomy device according to claim 1, characterized in that, The protective sheath also has a side surface, and the side surface is connected to the upper surface and the lower surface in a smooth transition. 5. The durotomy device according to claim 1, characterized in that, The protective sheath has a connected front protective part and a rear protective part. The rear protective part is connected to the distal end of the handle and extends along the axial direction of the handle. The rear protective part is connected to the front protective part. There is an angle between them. 6. The durotomy device according to claim 5, characterized in that, The included angle is 110 degrees to 120 degrees. 7. The durotomy device according to claim 1, characterized in that, The blade of the blade has a concave arc shape. 8. The durotomy device according to claim 1, characterized in that, The back of the blade is embedded in the upper surface of the protective sheath. 9. The durotomy device according to claim 1, characterized in that, The blade is provided with a clamping slot, and the distal end of the handle is provided with a clamping block that matches the clamping slot. 10. The durotomy device according to claim 1, characterized in that, The material of the protective sheath is medical plastic or elastic material; the material of the handle is medical plastic.