Vessel and tissue separating knife

Abstract

The utility model discloses a kind of blood vessel and tissue separation knives, relate to scalpel technical field, including: handle and blade, the side of the blade is provided with cutting edge, the both sides of the cutting edge are asymmetric structure;The utility model makes the both sides of cutting edge asymmetric structure, makes both sides stress uneven when cutting, cutting resistance is smaller, and it is not easy to tear tissue;Because two sides are asymmetric, wear will not concentrate in the cutting edge of cutting edge, prolongs the service life of tool;And adapt to the composite cutting scene of different hardness tissue.

Description

Technical Field

[0001] This utility model relates to the field of surgical scalpel technology, specifically a blood vessel and tissue separation scalpel. Background Technology

[0002] A scalpel is a common medical instrument used by doctors during surgery. Scalpels come in various types, such as the bow-handled scalpel used for longer skin incisions and cutting the anterior sheath of the rectus abdominis muscle; the pen-handled scalpel used for short incisions and delicate surgeries, such as dissecting blood vessels, nerves, and cutting the peritoneum; the grip-handled scalpel used for incisions involving a wide cutting range, thick tissues, and greater force, such as amputations, tendon incisions, and longer skin incisions; and the reverse-prying scalpel used for cutting abscesses, blood vessels, trachea, common bile duct, or ureter, cutting clamped tissues, or enlarging skin incisions, etc.

[0003] Most existing technologies use symmetrical blades, which result in uniform force on both sides during cutting, leading to high cutting resistance and a tendency to tear tissue (such as vascular damage during surgery). The wear of the blade edge is concentrated in symmetrical positions, resulting in a short lifespan. They are also unsuitable for complex cutting scenarios involving tissues of different hardness (such as simultaneously cutting soft tissue and hard fascia).

[0004] In view of this, there is an urgent need for a vascular and tissue separation knife. Utility Model Content

[0005] To address the problems existing in the prior art, this utility model solves the problem using the following technical structure.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A blood vessel and tissue separation knife includes: a handle and a blade, wherein a cutting edge is provided on one side of the blade, and the two sides of the cutting edge have an asymmetrical structure.

[0008] A further feature is that,

[0009] Both sides of the blade are flat.

[0010] The two sides of the blade are α1 and α2, respectively, where α1 ≠ α2.

[0011] The α1 and α2 satisfy 0°<|α1-α2|≤30°.

[0012] The α1 and α2 satisfy 5°≤|α1-α2|≤15°.

[0013] The blade widths on both sides are L1 and L2, respectively, and L1 and L2 satisfy 3 / 7≤L1 / L2≤2 / 3.

[0014] The roughness on both sides of the blade is Ra1 and Ra2, respectively, and Ra1 ≠ Ra2.

[0015] Ra1 and Ra2 satisfy 0μm<|Ra1-Ra2|≤0.8μm.

[0016] One side of the blade is a flat surface, and the other side is a curved surface.

[0017] The handle and blade are made of stainless steel or ceramic.

[0018] The above-described structure of this utility model can achieve the following beneficial effects:

[0019] By setting the two sides of the blade to an asymmetrical structure, the force is uneven on both sides during cutting, resulting in less cutting resistance and less likelihood of tearing tissue. Due to the asymmetry of the two sides, wear will not be concentrated at the edge of the blade, extending the service life of the tool. It is also suitable for complex cutting scenarios with different hardness of tissues. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of Embodiment 1;

[0021] Figure 2 This is a front view of the structure showing the cutting edge angle in Embodiment 1;

[0022] Figure 3 This is a front view of the structure showing the blade width in Embodiment 1;

[0023] Figure 4 This is a schematic diagram of the structure of Example 2.

[0024] In the picture: 1. Blade; 2. Edge. Detailed Implementation

[0025] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0026] It should be noted that the terms "comprising" and "having" and any variations thereof in the specification, claims and accompanying drawings of this utility model are intended to cover non-exclusive inclusion. For example, a process, method, apparatus, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such processes, methods, products or devices.

[0027] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0028] Example 1: Reference Figure 1-3 The illustrated vascular and tissue separation knife includes: a handle and a blade 1. The blade 1 has a cutting edge 2 on one side, and the two sides of the cutting edge 2 are asymmetrical. By setting the two sides of the cutting edge 2 to be asymmetrical, the force on both sides is uneven during cutting, the cutting resistance is small, and it is not easy to tear tissue (such as vascular damage during surgery). Due to the asymmetry of the two sides, wear will not be concentrated at the cutting edge of the cutting edge 2, thus extending the service life of the knife. It is also suitable for complex cutting scenarios of tissues with different hardness (such as cutting soft tissue and hard fascia at the same time).

[0029] like Figure 2 As shown, the two sides of the blade 2 have an asymmetrical structure, including different blade angles. When both sides of the blade 2 are planes, the two sides of the blade 2 form blade angles α1 and α2, respectively, where α1 ≠ α2, and α1 and α2 satisfy 0°<|α1-α2|≤30°. For example, α1 is 60 degrees and α2 is 30 degrees, or α1 is 50 degrees and α2 is 40 degrees. Among them, α1 and α2 satisfying 5°≤|α1-α2|≤15° is a better choice, such as α1 is 60 degrees and α2 is 45 degrees, or α1 is 50 degrees and α2 is 35 degrees.

[0030] like Figure 3 As shown, the asymmetrical structure of the two sides of the blade 2 also includes different cutting edge widths. The cutting edge widths on both sides of the blade 2 are L1 and L2, respectively. L1 and L2 satisfy 3 / 7≤L1 / L2≤2 / 3. That is, L1 is 60% to 70% of the total blade width, and L2 is 30% to 40% of the total blade width. In other words, when L1 is 60% of the total blade width, L2 is 40% of the total blade width; when L1 is 70% of the total blade width, L2 is 30% of the total blade width; and when L1 is 65% of the total blade width, L2 is 35% of the total blade width.

[0031] Further optimization involves the asymmetric structure of the two sides of the blade 2, which also includes the difference in roughness between the two sides of the blade 2. When the roughness of the two sides of the blade 2 is Ra1 and Ra2 respectively, Ra1≠Ra2, the optimal condition is that Ra1 and Ra2 satisfy 0μm<|Ra1-Ra2|≤0.8μm.

[0032] A further optimization is that the asymmetrical structure of the blade 2 includes a lubricating coating on one side of the blade 2 and no lubricating coating on the other side.

[0033] Furthermore, the handle and blade in this embodiment can be made of stainless steel or ceramic.

[0034] In addition to the embodiments described above, this application also includes, as well as, Figure 4 The second embodiment shown differs from the first embodiment in that one side of the blade 2 is a flat surface and the other side is an arc surface, so that the two sides of the blade 2 are subjected to different forces during cutting.

[0035] In summary, by setting the two sides of the blade 2 to an asymmetrical structure, the force on both sides is uneven during cutting, resulting in less cutting resistance and making it less likely to tear tissue (such as vascular damage during surgery); due to the asymmetry of the two sides, wear will not be concentrated at the edge of the blade 2, thus extending the service life of the tool; and it is suitable for complex cutting scenarios of tissues with different hardness (such as cutting soft tissue and hard fascia at the same time).

[0036] The above are merely preferred embodiments of this application, and the present invention is not limited to the above embodiments. It is understood that other improvements and variations that can be directly derived or conceived by those skilled in the art without departing from the spirit and concept of the present invention should be considered to be included within the protection scope of the present invention.

Claims

1. A blood vessel and tissue separation knife, characterized in that, include: The blade (1) has a handle and a blade (2) on one side, and the blade (2) has an asymmetrical structure on both sides. The two sides of the blade (2) are α1 and α2, respectively, where α1 ≠ α2.

2. The blood vessel and tissue separation knife according to claim 1, characterized in that: Both sides of the blade (2) are flat.

3. The blood vessel and tissue separation knife according to claim 1, characterized in that: The α1 and α2 satisfy 0°<|α1-α2|≤30°.

4. The blood vessel and tissue separation knife according to claim 1, characterized in that: The α1 and α2 satisfy 5°≤|α1-α2|≤15°.

5. A blood vessel and tissue separation knife according to any one of claims 1-4, characterized in that: The blade widths on both sides of the blade (2) are L1 and L2, respectively, and L1 and L2 satisfy 3 / 7≤L1 / L2≤2 / 3.

6. A blood vessel and tissue separation knife according to any one of claims 1-4, characterized in that: The roughness of the two sides of the blade (2) is Ra1 and Ra2 respectively, and Ra1 ≠ Ra2.

7. The blood vessel and tissue separation knife according to claim 6, characterized in that: Ra1 and Ra2 satisfy 0μm<|Ra1-Ra2|≤0.8μm.

8. The blood vessel and tissue separation knife according to claim 1, characterized in that: The blade (2) has a flat surface on one side and an arc surface on the other side.

9. A blood vessel and tissue separation knife according to claim 1, characterized in that: The handle and blade (1) are made of stainless steel or ceramic.

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