Disposable vascular knife

Abstract

The utility model relates to a disposable blood vessel knife which comprises a knife handle and a blade, the knife handle is made of high polymer materials, the knife handle is composed of a tail portion, a handheld portion and a front portion, the blade is fixed with the front portion, and the section of the handheld portion is formed by sequentially connecting a plurality of straight edges and arc edges. The handle part of the vascular knife is made of high polymer materials, so that the weight is light, and the operation is more convenient. The section of the handheld part is designed into a structural form that a plane is connected with an arc surface, so that the handheld part is convenient to hold and can rotate smoothly. And the vascular knife is a disposable article, so that the risk of cross infection is avoided, and the sanitation and safety of an operation are ensured. The blade part is made of stainless steel, is small and exquisite in appearance and thin in thickness, and solves the problems that an existing scalpel blade is large in size and shields an operation visual field, a small operation area easily damages surrounding tissues, sharpness is poor, an incision is irregular, and the cutting depth is difficult to grasp.

Description

Technical Field

[0001] The utility model relates to the technical field of surgical knives, in particular to a disposable vascular knife. Background Art

[0002] The scalpels commonly used in clinical practice are made of separate blades and handles. The blades of ordinary scalpels produced according to the national standard "YY 0174-2019" have a minimum width of 6.5mm and a length of 42mm. They appear particularly large under a magnifying glass and are not suitable for use in microsurgery, especially for the dissection of delicate tissues. The overly long blade cannot be used in a small range. The wider and longer blades block the line of sight, which can easily cause uneven dissection ports of blood vessels, nerves, and lymphatic vessels, and a low success rate of anastomosis. Among them, the handles of ordinary surgical scalpels produced according to the national standard "YY 0175-2005" have a thickness of 3.6-4.0cm, a width of 7.0-9.0cm, a rectangular cross-section shape, a length of 125-220cm, and a stainless steel handle. The rectangular cross-section cannot be flexibly rotated during operation. The stainless steel material makes the handle heavy and not flexible enough during operation. Utility Model Content

[0003] The utility model aims to provide a disposable vascular knife to solve the problems of heavy weight and inflexible operation of the existing surgical knife.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] The disposable vascular knife comprises a handle and a blade. The handle is made of polymer material and is composed of a tail, a hand-held part and a front part. The blade is fixed to the front part. The cross section of the hand-held part is formed by connecting a plurality of straight edges and arc edges in sequence.

[0006] Beneficial effects of the utility model:

[0007] The vascular knife of the utility model adopts a polymer material for the handle part, which is light in weight and more convenient to operate. The cross section of the hand-held part of the handle is designed to be connected with a flat surface and an arc surface, which is not only convenient to hold, but also can be smoothly rotated. The vascular knife of the utility model is a disposable product, which avoids the risk of cross infection and ensures the hygiene and safety of the operation.

[0008] Furthermore, the cross section of the handle portion is formed by connecting four straight sides and arc sides in sequence.

[0009] Furthermore, each arc edge is on the same circle, and each straight edge is located on the same square.

[0010] Furthermore, the cross-sectional area of ​​the tail is larger than that of the hand-held part. The tail is heavy, and when the vascular knife is placed on the table, the tail touches the ground first to prevent the blade from being damaged.

[0011] Furthermore, one side of the tail is set as a blade angle identification area. The vascular knife has blades with different angles, and the angle identification can be used to quickly identify and select a suitable knife.

[0012] Furthermore, the front part gradually becomes smaller from the hand-held part to the front part. The front part of the handle does not block the surgical field of view, which is convenient for cutting tiny tissues, organs and blood vessels in a narrow space.

[0013] Furthermore, the blade is a cutting knife, made of stainless steel, the thickness of the blade is 0.14-0.16 mm, and the front end angle of the blade is less than 30 degrees.

[0014] Furthermore, the width of the blade is 0.6-1mm, and the blade length is 3-6mm. The blade size is smaller and does not block the surgical field of view. Doctors can easily and accurately perform blood vessel cutting surgery, reducing the operation time and operation difficulty, and improving the safety of the operation.

[0015] Furthermore, the blade has a double edge, the first edge angle is 10-15 degrees, and the second edge angle is 20-30 degrees. The double edge, combined with the thinner blade, is sharper and easier to control the cutting depth.

[0016] Furthermore, a protrusion is provided on the front of the knife handle to form a blade direction identification portion. The protrusion provided on one side of the blade facilitates rapid identification of the blade direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural view of the first embodiment of the disposable vascular knife of the utility model;

[0018] Figure 2 yes Figure 1 Partial view of the middle blade (showing thickness);

[0019] Figure 3 yes Figure 1 Partial view of the middle blade (showing width and angle);

[0020] Figure 4 This is a structural view of Embodiment 2 of the disposable vascular knife of the utility model;

[0021] Figure 5 This is a comparison of two different blade angles;

[0022] Figure 6 is a view showing the double edge of the blade;

[0023] Figure 7 yes Figure 6 Middle AA section;

[0024] Figure 8 It is a cross-sectional view of the hand-held part of the knife handle;

[0025] Fig. 9 This is a partial enlarged view of the tail of the handle;

[0026] Fig.10 It is a structural view of Example 3 of the disposable vascular knife of the utility model.

[0027] 1. Tail; 11. Blade angle marking area; 2. Handle; 3. Front; 4. Blade; 41. Blade edge; 5. Protrusion. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the utility model.

[0029] Embodiment 1 of the present utility model:

[0030] like Figure 1 As shown, the disposable vascular knife comprises a knife handle and a blade 4, wherein the blade is a dissecting knife and is made of stainless steel. The knife handle is composed of a tail portion 1, a hand-held portion 2, and a front portion 3, and the blade 4 is fixed to the front portion 3.

[0031] Figure 2 and 3 As shown, the thickness of the blade is 0.15mm, and a thickness value near 0.15mm, such as 0.14mm, 0.16mm, can also be used. The front angle of the blade is less than 30 degrees. The width of the blade is 0.8mm, and a value within the range of 0.6-1mm can also be used. The blade length of the blade is 3-6mm. Different blade head lengths are selected for different blood vessel diameters.

[0032] Figure 1 The front part of the handle is at 0 angle to the blade, or it can be set at a certain angle, such as Figure 4 As shown (referred to as Example 2). Figure 5 A comparison of two different cutter head angles is shown.

[0033] Figure 6 and 7 As shown, it is a partial view of one end of the vascular knife, and the blade has a double-edged edge. The first edge angle is 12 degrees, and in other embodiments, it can also be 10-15 degrees; the second edge angle is 28 degrees, and in other embodiments, it can also be 20-30 degrees.

[0034] The blade has good corrosion resistance and cutting performance. The fine shape and ultra-thin thickness ensure precise cutting, less damage to patients, shortened operation time and high efficiency.

[0035] The front part of the handle gradually becomes smaller from the hand-held part to the front, which does not block the surgical field of view and is convenient for cutting tiny tissues, organs and blood vessels in a narrow space.

[0036] The front part of the handle of a knife is provided with a projection 5 to form a blade direction identification portion. Because the blade size is small, the projection provided on one side of the blade is convenient to quickly identify the blade direction.

[0037] Figure 8 As shown, the cross section of the handheld part is formed by connecting four straight edges and arc edges in sequence. Each arc edge is on the same circle, and each straight edge is located on the same square. That is, the outer circumference of the handheld part is 4 straight surfaces, which can ensure accurate positioning when holding the hand, and the arc surface between adjacent straight surfaces is convenient for hand holding and can rotate smoothly. The thickness of the handle is about 6mm, which is close to the size of a pencil used in daily life, which is conducive to the use of the vascular knife in a pen-like manner.

[0038] The cross-sectional area of ​​the tail is larger than that of the hand-held part and the front part, so that the tail is heavy. When the vascular knife is placed on the table, the tail touches the ground first to prevent the blade from being damaged.

[0039] Fig. 9 As shown, one side surface of the tail portion 1 is provided as a blade angle identification area 11 . Figure 1 The vascular knife shown is marked as "0°". Other commonly used angles are 10°, 25°, 35°, 45°, and minus 10°. The angles are marked for easy identification. Different knife angles are used for cutting blood vessels in different parts.

[0040] Furthermore, the knife handle is made of medical polymer materials, such as ABS and other common materials, and the material itself is not the innovation of the utility model. Compared with the knife handle made of stainless steel, the weight is reduced, it is convenient to hold and use, and it is also easy to manufacture.

[0041] The vascular knife of the utility model can use different blade lengths for different blood vessel diameters, and different blade angles for cutting blood vessels in different parts. The handle of the vascular knife is made of polymer material, which is light in weight, making it easier to operate. The blade is smaller in size, so doctors can easily and accurately perform blood vessel cutting surgery, reducing the operation time and operation difficulty, and improving the safety of the surgery. The disposable product avoids the risk of cross infection and ensures the hygiene and safety of the surgery.

[0042] Embodiment 3 of the present utility model:

[0043] Fig.10As shown, the disposable vascular knife includes a handle and a blade 4. The blade is a stripping knife and is also made of stainless steel. The handle is composed of a tail 1, a hand-held portion 2, and a front portion 3, and the blade 4 is fixed to the front portion 3. The difference from Example 1 is that the blade is different, and the handle is the same, so the specific structure and size of the handle are not repeated. The stripping knife uses an existing blade, which is not described in detail.

Claims

1. A disposable vascular knife, comprising a handle and a blade, characterized in that: The knife handle is made of polymer material, and is composed of a tail, a grip part and a front part. The blade is fixed to the front part, and the cross section of the grip part is formed by connecting a plurality of straight edges and arc edges in sequence.

2. The disposable vascular knife according to claim 1, characterized in that: The cross section of the handle portion is formed by connecting four straight sides and arc sides in sequence.

3. The disposable vascular knife according to claim 2, characterized in that: All arc sides are on the same circle, and all straight sides are on the same square.

4. The disposable vascular knife according to claim 1, characterized in that: The cross-sectional area of ​​the tail portion is greater than the cross-sectional area of ​​the hand-held portion.

5. The disposable vascular knife according to claim 1, characterized in that: One side surface of the tail portion is configured as a cutter head angle identification area.

6. The disposable vascular knife according to claim 1, characterized in that: The front portion gradually becomes smaller from the hand-held portion to the front.

7. The disposable vascular knife according to claim 1, characterized in that: The blade is a cutting knife, made of stainless steel, the thickness of the blade is 0.14-0.16 mm, and the front end angle of the blade is less than 30 degrees.

8. The disposable vascular knife according to claim 7, characterized in that: The width of the blade is 0.6-1 mm, and the blade edge length is 3-6 mm.

9. The disposable vascular knife according to claim 7, characterized in that: The blade has a double-edged edge, wherein the first edge angle is 10-15 degrees, and the second edge angle is 20-30 degrees.

10. The disposable vascular knife according to any one of claims 1 to 9, characterized in that: A protrusion is arranged on the front part of the knife handle to form a blade direction identification part.

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