Optic nerve decompression knife
By designing the optic nerve decompression knife, the safety issue of sheath incision at the junction of the inner wall and upper wall of the optic canal is solved, the reliable incision of the sheath and protection of the ophthalmic artery are achieved, and the safety and versatility of the operation are enhanced.
Patent Information
- Application Number
- CN202422312917.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-23
- Publication Date
- 2025-10-03
- Estimated Expiration
- 2034-09-23
AI Technical Summary
The prior art lacks surgical instruments specifically for incising the sheath at the junction of the inner wall and the upper wall of the optic canal, which results in ordinary scalpels easily slipping and damaging the ophthalmic artery.
An optic nerve decompression knife is designed, including a handle, a first rod and an arc-shaped knife body. The inner diameter of the knife body is 3.5mm-4mm, which can wrap the optic nerve sheath and cut the sheath along its length to prevent slippage. It can be combined with a curette for bone removal to enhance operational safety.
It achieves reliable incision of the tunica vaginalis at the junction of the inner wall and the upper wall of the optic canal, avoids blade slippage and ophthalmic artery injury, and improves the safety and versatility of the operation.
Smart Images
Figure CN223404016U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of optic nerve surgical instruments, in particular to an optic nerve decompression knife. Background Art
[0002] During optic nerve decompression surgery, sufficient resection of the bone of the medial and inferior walls of the optic canal is one of the keys to optic nerve decompression. The optic canal is located deep, the operating space is narrow, and it is adjacent to the internal carotid artery posteriorly, the ophthalmic artery below, the trochlear nerve medially, and the floor of the middle cranial fossa above. Therefore, precise resection of the bone of the medial and inferior walls of the optic canal is the key to sufficient decompression and avoiding complications.
[0003] However, in the prior art, there is currently no surgical instrument specifically designed for cutting the tunica sheath at the junction of the inner wall and the upper wall of the optic canal. That is, during optic nerve decompression surgery, the surgeon uses an ordinary scalpel. When using an ordinary scalpel to cut the tunica sheath at the junction of the inner wall and the upper wall of the optic canal, the scalpel is likely to slip off the tunica sheath and damage the ophthalmic artery, thus posing a major safety hazard. Utility Model Content
[0004] The technical problem to be solved by the present invention is to provide an optic nerve decompression knife, which can reliably cut the sheath located at the junction of the inner wall and the upper wall of the optic canal, and can prevent the knife body from slipping off the optic nerve sheath, that is, it can avoid damaging the ophthalmic artery.
[0005] The utility model provides an optic nerve decompression knife, comprising a handle, a first rod body and an arc-shaped knife body; the first rod body and the handle are coaxially arranged, the lower end of the first rod body is connected to the upper end of the handle as a whole, the upper end of the first rod body is connected to one end of the knife body as a whole, the opening direction of the knife body is toward one side of the radial direction of the first rod body, and a blade is provided on the other end of the knife body.
[0006] By adopting the above structure, when the handle is held and the present invention is used, the blade wraps around the optic nerve sheath and moves along the length direction of the optic nerve sheath. At this time, the blade can just cut the sheath located at the junction of the inner wall and the upper wall of the optic canal. In addition, the blade can be prevented from slipping off the optic nerve sheath, that is, damage to the ophthalmic artery can be avoided.
[0007] In one possible embodiment, the inner diameter of the blade body is 3.5mm-4mm; since the vertical diameter of the optic nerve sheath of an adult is exactly 3.5mm-4mm, by setting the inner diameter of the blade body to 3.5mm-4mm, the blade body can just wrap around the optic nerve sheath, so that when the blade body wraps around the optic nerve sheath and the blade body moves along the length direction of the optic nerve sheath, the blade can just cut the sheath located at the junction of the inner wall and the upper wall of the optic canal. In addition, the blade body can be prevented from slipping off the optic nerve sheath, thereby avoiding damage to the ophthalmic artery.
[0008] In a possible embodiment, the optic nerve decompression knife also includes a second rod and a curette; the second rod is coaxially arranged with the handle, the upper end of the second rod is connected to the lower end of the handle as a whole, and the lower end of the second rod is connected to the curette as a whole; by adopting this structure, in clinical surgery, after most of the bone is ground off with a high-speed electric drill at the skull base, a curette can be used to remove the thinned bone wall at the upper and lower edges of the optic canal and the cranial opening, thereby preventing damage to the middle skull base and the internal carotid artery. In addition, the utility model can also have the advantage of being multifunctional.
[0009] In one possible embodiment, an anti-slip mesh pattern is rolled on the outer peripheral wall of the handle; after the anti-slip mesh pattern is rolled on the outer peripheral wall of the handle, the friction between the fingers and the handle can be increased when holding the handle and using the utility model, thereby achieving the purpose of anti-slip.
[0010] In a possible embodiment, the outer diameter of the first rod body and the outer diameter of the second rod body are both smaller than the outer diameter of the handle; the upper end of the handle is connected to the lower end of the first rod body through a first conical reducing portion; the lower end of the handle is connected to the upper end of the second rod body through a second conical reducing portion; through the arrangement of the first conical reducing portion and the second conical reducing portion, under the action of the first conical reducing portion, the lower end of the first rod body can be reliably connected to the upper end of the handle, and under the action of the second conical portion, the upper end of the second rod body can be reliably connected to the lower end of the handle.
[0011] In one possible embodiment, the handle, the first rod, the blade, the second rod and the curette are made of a stainless steel material in one piece. By using a stainless steel material to make the handle, the first rod, the blade, the second rod and the curette in one piece, the utility model has the advantages of good integrity and high structural strength. In addition, after using a stainless steel material to make the handle, the first rod, the blade, the second rod and the curette in one piece, the utility model can be conveniently disinfected and sterilized using a disinfection device. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] FIG1 is a schematic structural diagram of the present utility model. DETAILED DESCRIPTION
[0013] First, those skilled in the art should understand that these embodiments are merely used to explain the technical principles of the embodiments of the present application and are not intended to limit the scope of protection of the embodiments of the present application. Those skilled in the art may adjust them as needed to suit specific application scenarios.
[0014] In the description of the embodiments of this application, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of this application based on the specific circumstances.
[0015] In the embodiments of the present application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," and "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.
[0016] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0017] As shown in Figure 1, an embodiment of the present application discloses an optic nerve decompression knife, including a handle 1, a first rod 2 and an arc-shaped knife body 3; the first rod 2 is coaxially arranged with the handle 1, the lower end of the first rod 2 is connected to the upper end of the handle 1 as a whole, the upper end of the first rod 2 is connected to one end of the knife body 3 as a whole, the opening direction of the knife body 3 is toward one side of the radial direction of the first rod 2, and a blade 31 is provided on the other end of the knife body 3.
[0018] The inner diameter of the blade body 3 is 3.5mm-4mm; since the vertical diameter of the optic nerve sheath of an adult is exactly 3.5mm-4mm, by setting the inner diameter of the blade body to 3.5mm-4mm, the blade body can just wrap around the optic nerve sheath, so that when the blade body wraps around the optic nerve sheath and the blade body moves along the length direction of the optic nerve sheath, the blade can just cut the sheath located at the junction of the inner wall and the upper wall of the optic canal. In addition, the blade body can be prevented from slipping off the optic nerve sheath, thereby avoiding damage to the ophthalmic artery. In addition, the cross-section of the blade body is a rectangle with a width of 1mm and a length of 2mm, and the length of the blade is 1mm. Using a blade body and blade of this shape and size can make the blade body move more smoothly along the length direction of the optic nerve sheath, and the blade can more smoothly cut the sheath located at the junction of the inner wall and the upper wall of the optic canal.
[0019] The optic nerve decompression knife also includes a second rod body 4 and a curette 5; the second rod body 4 is coaxially arranged with the handle 1, the upper end of the second rod body 4 is connected to the lower end of the handle 1 as a whole, and the lower end of the second rod body 4 is connected to the curette 5 as a whole; after adopting this structure, in clinical surgery, after most of the bone is ground away with a high-speed electric drill at the skull base, a curette can be used to remove the thinned bone wall at the upper and lower edges of the optic canal and the cranial opening, thereby preventing damage to the middle skull base and the internal carotid artery. In addition, the utility model can also have the advantage of being multifunctional.
[0020] The outer wall of the handle 1 is rolled to form an anti-skid mesh 11; by rolling the anti-skid mesh on the outer wall of the handle, the friction between the fingers and the handle can be increased when holding the handle and using the utility model, thereby achieving the purpose of anti-skid.
[0021] The outer diameter of the first rod body 2 and the outer diameter of the second rod body 4 are both smaller than the outer diameter of the handle 1; the upper end of the handle 1 is connected to the lower end of the first rod body 2 through the first tapered reducing portion 12; the lower end of the handle 1 is connected to the upper end of the second rod body 4 through the second tapered reducing portion 13; through the arrangement of the first tapered reducing portion and the second tapered reducing portion, under the action of the first tapered reducing portion, the lower end of the first rod body can be reliably connected to the upper end of the handle, and under the action of the second tapered portion, the upper end of the second rod body can be reliably connected to the lower end of the handle.
[0022] The handle 1, the first rod body 2, the blade body 3, the second rod body 4 and the curette 5 are made of a stainless steel material in one piece. After the handle, the first rod body, the blade body, the second rod body and the curette are made of a stainless steel material in one piece, the utility model has the advantages of good integrity and high structural strength. In addition, after the handle, the first rod body, the blade body, the second rod body and the curette are made of a stainless steel material in one piece, the utility model can be conveniently disinfected and sterilized using a disinfection device.
[0023] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.
Claims
1. An optic nerve decompression knife, characterized by: The invention comprises a handle (1), a first rod (2) and an arc-shaped blade (3); the first rod (2) and the handle (1) are coaxially arranged, the lower end of the first rod (2) is integrally connected to the upper end of the handle (1), the upper end of the first rod (2) is integrally connected to one end of the blade (3), the opening direction of the blade (3) faces one side in the radial direction of the first rod (2), and the other end of the blade (3) is provided with a blade (31).
2. The optic nerve decompression knife according to claim 1, characterized in that: The inner diameter of the blade body (3) is 3.5 mm to 4 mm.
3. The optic nerve decompression knife according to claim 1 or 2, characterized in that: The optic nerve decompression knife further comprises a second rod (4) and a curette (5); the second rod (4) is coaxially arranged with the handle (1), the upper end of the second rod (4) is integrally connected to the lower end of the handle (1), and the lower end of the second rod (4) is integrally connected to the curette (5).
4. The optic nerve decompression knife according to claim 3, characterized in that: An anti-slip mesh pattern (11) is formed by rolling on the outer peripheral wall of the handle (1).
5. The optic nerve decompression knife according to claim 4, characterized in that: The outer diameters of the first rod body (2) and the second rod body (4) are both smaller than the outer diameter of the handle (1); the upper end of the handle (1) is integrally connected to the lower end of the first rod body (2) via a first tapered reducing portion (12); and the lower end of the handle (1) is integrally connected to the upper end of the second rod body (4) via a second tapered reducing portion (13).
6. The optic nerve decompression knife according to claim 5, characterized in that: The handle (1), the first rod body (2), the blade body (3), the second rod body (4) and the curette (5) are integrally made of stainless steel.