Biomaterial cutting tools
By designing a biomaterial cutting tool, the problem of accurately cutting biomaterials such as amniotic membrane in existing technologies has been solved, enabling precise cutting of biomaterials in ophthalmic surgery and improving surgical outcomes and safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BEIJING TONGREN HOSPITAL AFFILIATED TO CAPITAL MEDICAL UNIV
- Filing Date
- 2024-12-30
- Publication Date
- 2026-07-31
AI Technical Summary
Existing technologies make it difficult to mechanically and precisely cut biological materials such as the amnion, internal limiting membrane, and posterior capsule to meet the diverse ophthalmic surgical needs of individuals.
A biomaterial cutting tool was designed, including an inner pusher, an outer sleeve, a push rod, a blade section, and a connecting section. The blade section can be precisely adjusted through a threaded connection and locking structure, providing an approximately annular cutting edge to adapt to the cutting needs of different scenarios.
It enables precise, flexible, and simple cutting of biomaterials, adapting to the individualized needs of different ophthalmic surgeries and reducing postoperative inflammatory reactions and the chance of recurrence.
Smart Images
Figure CN224572897U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of surgical tool technology, and in particular to a biomaterial cutting tool. Background Technology
[0002] Like patients with high myopia, they have fundus manifestations and anatomical changes such as longer axial length, choroidal and retinal atrophy, and posterior staphyloma. In addition, the macular hole is large, making it difficult to close the hole with traditional internal limiting membrane peeling.
[0003] The amniotic membrane has a similar structure to the human conjunctiva, containing ocular surface epithelial cells, including substances necessary for the growth of conjunctival and corneal epithelial cells. It is smooth, avascular, avascular, nerve-free, and lymphatic, and possesses a degree of elasticity. Amniotic membrane transplantation surgery involves transplanting amniotic membrane tissue to repair wounds on the conjunctiva or cornea, promoting rapid epithelialization. Studies have shown that amniotic membrane patches placed under the macular hole help the growth of retinal muller cells, promote the healing of the macular hole, and facilitate retinal repositioning, thereby improving vision. Compared to traditional treatments, amniotic membrane transplantation can reduce postoperative inflammation, promote wound healing, and decrease the recurrence rate. Furthermore, the internal limiting membrane and posterior capsule can also be used for macular hole closure.
[0004] The combined use of existing instruments is not ideal, and it is not yet possible to mechanically and precisely cut biological materials such as the amnion, internal limiting membrane, and posterior capsule to suit various individual ophthalmic surgeries. Utility Model Content
[0005] In view of this, this application proposes a biomaterial cutting tool that can solve the aforementioned existing technical problems. This application provides the following technical solution:
[0006] A biomaterial cutting tool includes: an inner pusher cylinder, an outer sleeve, a push rod, N blade sections, and a connecting part, wherein: the outer sleeve is fitted over the inner pusher cylinder, and the inner pusher cylinder is configured to be axially movable relative to the outer sleeve; each blade section is configured as a thin plate with a generally frustum-shaped side surface of 1 / N, and the N blade sections together generally form a frustum shape, where N is a positive integer greater than or equal to 2; the front end of each blade section has a cutting edge, and the middle part of each blade section has a groove; the connecting part is used to connect the front end of the outer sleeve and the blade section; the front end of the push rod is slidable in the groove, and the rear end of the push rod is connected to the inner pusher cylinder.
[0007] The biomaterial cutting tool according to an example embodiment of this application further includes a locking structure for locking the relative positions of the inner push cylinder and the outer sleeve.
[0008] According to an example embodiment of the biomaterial cutting tool of this application, the inner pusher and the outer sleeve are configured to be threadedly connected.
[0009] According to the exemplary embodiments of the present application, the biomaterial cutting tool has a threaded connection in the form of a double-threaded connection.
[0010] According to an example embodiment of the biomaterial cutting tool of this application, the pitch of the threaded connection is 0.5 mm to 2 mm.
[0011] According to the example embodiments of the present application, the biomaterial cutting tool has N ranging from 8 to 32.
[0012] According to the exemplary embodiments of the present application, the material of the cutting blade is medical stainless steel or titanium alloy.
[0013] According to an example embodiment of the present application, in a biomaterial cutting tool, the connecting portion is used to connect the central position of the blade portion and the outer sleeve.
[0014] According to an exemplary embodiment of this application, the biomaterial cutting tool has a minimum top radius of 0.3 mm to 3 mm and a maximum top radius of 10 mm to 20 mm.
[0015] The biomaterial cutting tool according to an exemplary embodiment of this application further includes a caliber indicator for indicating the current cutting radius of the biomaterial cutting tool.
[0016] The biomaterial cutting tool according to the embodiments of this application can provide an approximately annular cutting edge and can precisely, flexibly and easily adjust the cutting diameter to adapt to the cutting needs of different scenarios. Attached Figure Description
[0017] For illustrative and not limiting purposes, this application will now be described with reference to preferred embodiments, and in particular with reference to the accompanying drawings, in which:
[0018] Figure 1 This is a cross-sectional schematic diagram of the biomaterial cutting tool according to an embodiment of this application;
[0019] Figure 2 This is a schematic diagram showing the unfolded side surface of a frustum.
[0020] Figure 3 This is a schematic diagram of the operation of the biomaterial cutting tool according to an embodiment of this application;
[0021] Figure 4 This is a schematic diagram of the matching of the inner pusher and outer sleeve in the biomaterial cutting tool of this application embodiment. Detailed Implementation
[0022] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0023] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, terms such as "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0024] It should also be noted that in the accompanying drawings of this application, the end closest to the tissue being cut is defined as "anterior" (e.g., the end closest to the tissue being cut). Figure 1 and Figure 3 The top of the middle section is called "the top" (or "the top of the middle"). The opposite end is called "the back" (or "the middle").
[0025] Figure 1 This is a cross-sectional schematic diagram of the biomaterial cutting tool according to an embodiment of this application. For example... Figure 1 As shown, the biomaterial cutting tool of this application mainly includes an inner push cylinder 100, an outer sleeve 200, a push rod 300, N blade portions 400, and a connecting portion 500. The outer sleeve 200 is sleeved on the inner push cylinder 100, and the inner push cylinder 100 is configured to be movable axially relative to the outer sleeve 200. Each blade portion 400 is configured as a thin plate with a generally frustum-shaped side surface of 1 / N, and the N blade portions 400 generally form a frustum shape when enclosed. N is a positive integer greater than or equal to 2, and its value is preferably 8 to 32. If N is too small, it is difficult to form a frustum well; if N is too large, processing and assembly are difficult. It should be noted that reference can be made to... Figure 2 Understanding the frustum shape and its side surface. The blade portion 400 has a cutting edge 401 at its front end and a groove 402 in its middle. A connecting portion 500 connects the front end of the outer sleeve and the blade portion 400. The front end of the push rod 300 can slide in the groove 402, and the rear end of the push rod 300 is connected to the inner push cylinder 100. The biomaterial cutting tool of this embodiment provides an approximately annular cutting edge and allows for precise, flexible, and easy adjustment of the cutting diameter to adapt to different cutting needs. It should be noted that... Figure 1 Only two blade sections 400 are shown in the illustration; this is merely for the convenience of the example and not a limitation.
[0026] The working process of the biomaterial cutting tool in this application is as follows: Figure 3 As shown. Taking the outer sleeve 200 as a fixed reference point, when the user moves the inner push cylinder 100 back and forth, the inner push cylinder 100 will also push the push rod 300 back and forth. Since the top of the push rod 300 can slide in the slide groove 402, the movement of the push rod 300 can cause a change in the position of the blade part 400. This change is twofold: ① the back and forth position changes; ② the top radius R of the resulting frustum shape (which can be understood as the size of the annular cutting edge) changes, thus achieving the adjustment of the cutting diameter.
[0027] The biomaterial cutting tool according to the embodiments of this application may also include a locking structure (not shown in the figure) for locking the relative positions of the inner push cylinder 100 and the outer sleeve 200 to avoid unintended relative sliding between them, thereby avoiding unintended adjustment of the cutting diameter.
[0028] Figure 4 This is a schematic diagram illustrating the matching of the inner pusher cylinder and the outer sleeve in the biomaterial cutting tool according to an embodiment of this application. According to the biomaterial cutting tool of this application, such as... Figure 4 As shown, the inner pusher cylinder 100 and the outer sleeve 200 are connected by a thread. To improve the tightness of the fit between the inner pusher cylinder 100 and the outer sleeve 200, the thread connection can be a double-threaded type. The thread pitch can be from 0.5mm to 2mm. If the pitch is too large, it means that the forward and backward distance of turning the inner pusher cylinder 100 one revolution is too large, which is not conducive to fine adjustment of the position of the blade section and the fine adjustment of the cutting diameter R; if the pitch is too small, machining will be difficult.
[0029] According to the embodiments of this application, the material of the biomaterial cutting tool is medical stainless steel or titanium alloy, which has the advantages of wear resistance and easy sterilization.
[0030] According to the embodiments of this application, the biomaterial cutting tool has a connecting portion 500 for connecting the central position of the blade portion 400 and the outer sleeve 200. Choosing the central position of the blade portion 400 to connect with the outer sleeve 200 results in a more stable and robust mechanical structure.
[0031] According to the embodiments of this application, the biomaterial cutting tool has a minimum top radius of 0.3 mm to 3 mm and a maximum top radius of 10 mm to 20 mm. Biomaterial cutting tools meeting these data ranges are widely applicable to various scenarios.
[0032] The biomaterial cutting tool according to an embodiment of this application further includes a caliber indicator, which is used to indicate the current cutting radius of the biomaterial cutting tool.
[0033] The specific embodiments described above do not constitute a limitation on the scope of protection of this application. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can occur depending on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the scope of protection of this application.
Claims
1. A biomaterial cutting tool, characterized in that, include: The inner pusher cylinder (100), outer sleeve (200), push rod (300), N blade sections (400), and connecting section (500) are as follows: An outer sleeve (200) is fitted over an inner pusher sleeve (100), the inner pusher sleeve (100) being configured to move axially relative to the outer sleeve (200); Each of the blade portions (400) is configured as a thin plate of approximately one-Nth of the side surface of a frustum, and the N blade portions (400) together form a frustum, where N is a positive integer greater than or equal to 2. The front end of each blade portion (400) is provided with a cutting edge (401), and the middle part of each blade portion (400) is provided with a groove (402). The connecting part (500) is used to connect the front end of the outer sleeve and the blade part (400); The front end of the push rod (300) can slide in the groove (402), and the rear end of the push rod (300) is connected to the inner push cylinder (100).
2. The biological material cutting tool according to claim 1, wherein It also includes a locking structure for locking the relative positions of the inner push cylinder (100) and the outer sleeve (200).
3. The biological material cutting tool according to claim 1, wherein The inner push cylinder (100) and the outer sleeve (200) are connected by a thread.
4. The biological material cutting tool according to claim 3, wherein The threaded connection adopts a double-threaded form.
5. The biomaterial cutting tool according to claim 3, characterized in that, The pitch of the threaded connection is 0.5 mm to 2 mm.
6. The biomaterial cutting tool according to claim 1, characterized in that, The value of N is between 8 and 32.
7. The biomaterial cutting tool according to claim 1, characterized in that, The blade (401) is made of medical-grade stainless steel or titanium alloy.
8. The biomaterial cutting tool according to claim 4, characterized in that, The connecting part (500) is used to connect the central position of the blade part (400) and the outer sleeve (200).
9. The biomaterial cutting tool according to claim 1, characterized in that, The minimum radius of the top of the frustum is 0.3 mm to 3 mm, and the maximum radius of the top of the frustum is 10 mm to 20 mm.
10. The biomaterial cutting tool according to claim 1, characterized in that, It also includes a caliber indicator, which is used to indicate the current cutting radius of the biomaterial cutting tool.