A special micro forceps for stoma

Abstract

The present invention relates to the field of microsurgical instruments, and particularly to a special microsurgical forceps for stoma, which comprises two symmetrically arranged clamping arms. The upper ends of the two clamping arms are fixedly connected. Each clamping arm includes a forceps arm, a forceps handle, and a forceps blade. The two ends of the forceps arm are connected with the forceps handle and the forceps blade respectively. The forceps blade includes at least one clamping part, and the clamping part includes a first connecting section, a second connecting section, and an intermediate section extending in a horizontal straight line direction. One end of the intermediate section close to the forceps arm is connected with the first connecting section, and the other end of the intermediate section far from the forceps arm is connected with the second connecting section. The angles between the first connecting section and the intermediate section and between the second connecting section and the intermediate section are both obtuse angles, and the first connecting section, the intermediate section, and the second connecting section are smoothly transitioned at the joints. Based on the existing microsurgical forceps, a clamping part is provided at the forceps tip of the microsurgical forceps. The clamping part is in the shape of a rounded trapezoid, and the microsurgical scissors can perform shearing depending on the edge of the clamping part to obtain a stoma with a suitable shape and a blood vessel incision with a suitable length.

Description

Technical Field

[0001] The present invention relates to the field of microsurgical instruments, and particularly to a special microsurgical forceps for stoma. Background Art

[0002] An arteriovenous fistula is a vascular access for maintaining hemodialysis in patients with chronic renal failure. The quality of the fistula has an important impact on the effect of dialysis and the long-term survival of patients. Since Brescia et al. successfully established an arteriovenous fistula by anastomosing the radial artery and cephalic vein subcutaneously for the first time in 1966, for patients with renal function impairment caused by various diseases such as various chronic glomerulonephritis, diabetic nephropathy, hypertensive nephrosclerosis, renal failure, polycystic kidney, and lupus erythematosus nephropathy who require hemodialysis, arteriovenous fistula formation has become the preferred treatment. At present, there are various surgical methods for arteriovenous fistula formation at home and abroad. Among them, brachiocephalic vein-radial artery end-to-side anastomosis is still the preferred surgical method for arteriovenous fistula surgery in China.

[0003] The current surgical method for making a vascular side stoma in China is to free the blood vessel, suspend it with a microsuture or clamp the arterial side wall with a microsurgical forceps, and then use an ordinary microsurgical curved scissors to create a side stoma. However, the existing methods of suspending with a microsuture or clamping the arterial side wall with a microsurgical forceps have the following disadvantages: Suspending with a microsuture cannot guide or limit the shearing position of the microsurgical curved scissors. At the same time, suspending with a microsuture pulls and twists the fine blood vessels, causing additional damage while making it difficult to determine the surgical position, and it is difficult to control the size, shape, and dimensions of the blood vessel scissor incision.

[0004] Due to the small size, smooth surface, and sometimes smooth tissues such as mucosa attached to the fine blood vessels themselves, different from the overall clamping of soft tissues in other situations, during stoma surgery, only one side of the fine blood vessel to be excised can be clamped. The clamping position is small and the stress area is small. Even with the application of the microstructures and micro-tooth structures of the existing technologies, the clamping is still unstable and prone to falling off. At the same time, the head of the microsurgical forceps in the existing technology is circular, while the shearing surface shape of the stoma is a rounded trapezoid, so it cannot provide the corresponding guiding effect for the microsurgical scissors either. Summary of the Invention

[0005] In order to solve the above problems, the present invention provides a special microsurgical forceps for stoma. The present invention is implemented by the following scheme:

[0006] A special microscope forceps for stoma, comprising two symmetrically arranged clamping arms, the upper ends of the two clamping arms are fixedly connected, and the clamping arms include forceps arms, forceps handles, and forceps blades. The upper end of the forceps arm is connected to the forceps handle, and the lower end of the forceps arm is connected to the forceps blade. The forceps blade includes at least one clamping portion, and the clamping portion includes a first connecting section, a second connecting section, and an intermediate section extending in a horizontal straight line direction. One end of the intermediate section close to the forceps arm is connected to the first connecting section, and the end of the intermediate section far from the forceps arm is connected to the second connecting section. The angles between the first connecting section and the intermediate section and between the second connecting section and the intermediate section are both obtuse angles, and the first connecting section, the intermediate section, and the second connecting section are smoothly transitioned at the joints. Multiple clamping portions can fully increase the clamping area by clamping the blood vessels in the non-excised part, and at the same time, multiple clamping portions are provided. The microsurgical scissors can rely on the shape edge of the outer edge of the clamping portion to perform shearing to obtain a stoma with a suitable shape and size.

[0007] Further, guiding edges are provided on the outer edges of the first connecting section, the intermediate section, and the second connecting section, and the cross-section of the guiding edge is an isosceles rounded trapezoid. The guiding edge is an isosceles rounded trapezoid, and the microsurgical scissors rely on the shape edge of the guiding edge to perform shearing. The surface of the guiding edge is smoothly transitioned to guide the shearing direction of the microsurgical scissors.

[0008] Further, the angle formed by the axis of the forceps arm and the axis of the intermediate section is a, and 90° ≤ a ≤ 145°. The operator holds the two forceps arms, and there is an angle between the forceps blade and the forceps arm. When making a side stoma of the blood vessel, the forceps blade is located on one side of the forceps arm, which is convenient for the operator to observe the stoma site.

[0009] Further, the length of the clamping portion in the horizontal direction is L, and 2 mm ≤ L ≤ 7 mm. The length of the clamping portion corresponds to the length dimension of the blood vessel scissor incision.

[0010] Further, the number of the clamping portions is one to five. Multiple clamping portions are provided at the same time to increase the clamping area, and stomas of multiple sizes can be sheared.

[0011] Further, when the number of the clamping portions is two to five, the clamping portions are arranged in a horizontal straight line or in a vertical straight line. Multiple clamping portions evenly distributed on the straight lines in the horizontal and vertical directions are provided at the same time, and multiple stomas can be sheared.

[0012] Further, when the clamping portions are arranged in a horizontal straight line, the clamping portions are connected in sequence to form a whole, the axes of the intermediate sections of the clamping portions are collinear, and the area of the clamping portions gradually decreases in the direction away from the forceps arm. Multiple clamping portions evenly distributed on the straight line in the horizontal direction are provided at the same time, and multiple stomas can be sheared, and the lengths and sizes of the made stomas are different.

[0013] Further, when the clamping portions are arranged along a vertical straight line, the clamping portions are evenly spaced, and the area of the clamping portions gradually decreases from bottom to top. At the same time, a plurality of clamping portions evenly distributed on a longitudinal straight line are provided, which can be selected according to needs, and can cut out vascular incisions of various sizes.

[0014] Further, the included angle between the first connecting section and the middle section is 125°-135°, and the included angle between the second connecting section and the middle section is 125°-135°. The first connecting section, the middle section and the second connecting section are sequentially connected to form a rounded trapezoid, which can play a guiding role in the shape of the shearing surface of the fistula opening.

[0015] Compared with the prior art, the present invention has the following beneficial effects: On the basis of the existing micro forceps, a clamping portion is provided at the tip of the micro forceps, and the clamping portion is a rounded trapezoid. The micro scissors can rely on the edge of the clamping portion for shearing to obtain a fistula opening with a suitable shape and a vascular incision with a suitable length. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural diagram of the micro forceps for fistula opening provided by the present invention.

[0017] Figure 2 It is a schematic structural diagram of the micro forceps for fistula opening provided by the present invention.

[0018] Figure 3 It is a partial enlarged view of the guiding edge of the micro forceps for fistula opening provided by the present invention.

[0019] Figure 4 It is a schematic structural diagram of the forceps blade provided by the present invention.

[0020] Figure 5 It is a schematic structural diagram of the forceps blade provided by the present invention.

[0021] In the figure, it includes: forceps handle 1, forceps arm 2, axis 21 of the forceps arm, forceps blade 3, clamping portion 31, clamping portion 32, clamping portion 33, first connecting section 301, second connecting section 303, middle section 302, guiding edge 304. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] To facilitate the understanding of those skilled in the art, the present invention will be further described in detail below in conjunction with specific embodiments and the accompanying drawings.

[0023] Refer to Figures 1 to 5 , a micro forceps for fistula opening provided by the present invention includes two symmetrically arranged clamping arms. The upper ends of the two clamping arms are fixedly connected. The clamping arms include forceps arms 2, forceps handles 1, and forceps blades 3. The upper ends of the forceps arms 2 are connected to the forceps handles 1, and the lower ends of the forceps arms 2 are connected to the forceps blades 3. The forceps blade 3 includes at least one clamping portion (Figures 1 to 2 The forceps piece 3 shown in [figure] only has one clamping part), as Figures 4 to 5 shown, the clamping part includes a first connecting section 301, a second connecting section 303, and an intermediate section 302 extending in the horizontal straight line direction. One end of the intermediate section 302 close to the forceps arm 2 is connected to the first connecting section 301, and the other end of the intermediate section 302 far from the forceps arm 2 is connected to the second connecting section 303. The included angles between the first connecting section 301 and the intermediate section 302 and between the second connecting section 303 and the intermediate section 302 are both obtuse angles. The first connecting section 301, the intermediate section 302, and the second connecting section 303 are connected in sequence to form a trapezoid, and the first connecting section 301, the intermediate section 302, and the second connecting section 303 are smoothly transitioned at the joints. Multiple clamping parts can fully increase the clamping area by clamping the blood vessels at non-excised parts. At the same time, by providing multiple clamping parts, the micro-scissors can perform shearing depending on the shape edge of the outer edge of the clamping part to obtain a fistula opening with a suitable shape and size.

[0024] As Figure 3 shown, guide edges 304 are provided on the outer edges of the first connecting section 301, the intermediate section 302, and the second connecting section 303, and the cross-section of the guide edge 304 is an isosceles rounded trapezoid. The guide edge 304 is an isosceles rounded trapezoid. The micro-scissors perform shearing depending on the shape edge of the guide edge 304, and the surface of the guide edge 304 is smoothly transitioned to guide the shearing direction of the micro-scissors.

[0025] As Figures 4 to 5 shown, the horizontal dotted line marked in the figure is a parallel line to the axis of the intermediate section 302, and the included angle between the axis of the forceps arm 2 and the axis of the intermediate section 302 is a, 90° ≤ a ≤ 145°. The operator holds two forceps arms 2, and there is an included angle between the forceps piece 3 and the forceps arm 2. When making a side fistula opening of the blood vessel, the forceps piece 3 is located on one side of the forceps arm 2, which is convenient for the operator to observe the position of the fistula opening.

[0026] As Figures 4 to 5 shown, the length of the clamping part in the horizontal direction is L, 2 mm ≤ L ≤ 7 mm. The length of the clamping part corresponds to the length dimension of the blood vessel shear incision.

[0027] The number of the clamping parts is one to five, and preferably one to three. By providing multiple clamping parts at the same time, the clamping area is increased, and fistula openings of multiple sizes can be sheared.

[0028] Referring to Figure 4 and Figure 5 , when the number of the clamping parts is two to five, the clamping parts are arranged in a horizontal straight line or in a vertical straight line. By providing multiple clamping parts evenly distributed on the straight lines in the horizontal and vertical directions at the same time, multiple fistula openings can be sheared.

[0029] Referring toFigure 4 , the forceps piece 3 shown in Figure 4 has three clamping parts. When the three clamping parts are arranged in a horizontal straight line, the three clamping parts are connected in sequence to form a whole. The axes of the middle sections 302 of the clamping parts are collinear. The areas of the clamping parts gradually decrease in the direction away from the forceps arm 2. The three clamping parts are sequentially marked as clamping part 31, clamping part 32, and clamping part 33. The areas of clamping part 31, clamping part 32, and clamping part 33 gradually decrease, and the ratio between the area of clamping part 31 and the area of clamping part 32 is equal to the ratio between the area of clamping part 32 and the area of clamping part 33. At the same time, a plurality of clamping parts evenly distributed on a horizontal straight line are provided, and a plurality of fistula openings can be sheared, and the lengths and sizes of the produced fistula openings are different.

[0030] Referring to Figure 5 , when the clamping parts are arranged in a vertical straight line, the plurality of clamping parts are spaced apart. When the number of clamping parts is three to five, the distances between adjacent clamping parts are equal and the areas of the clamping parts gradually decrease from bottom to top. In Figure 5 the forceps piece 3 shown has two clamping parts. At the same time, two clamping parts distributed on a vertical straight line are provided. The two clamping parts are sequentially marked as clamping part 31 and clamping part 32 from top to bottom, and the area of clamping part 32 increases in proportion.

[0031] The included angle between the first connecting section 301 and the middle section 302 is 125° - 135°, and the included angle between the second connecting section 303 and the middle section 302 is 125° - 135°. The first connecting section 301, the middle section 302, and the second connecting section 303 are sequentially connected to form a rounded trapezoid, which can play a guiding role in the shape of the shearing surface of the fistula opening.

[0032] In the description of the present invention, it should be understood that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0033] In addition, terms such as "first" and "second" are only used for descriptive purposes, and cannot be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality of" means two or more, unless otherwise specifically defined.

[0034] In the present invention, unless otherwise clearly specified or limited, terms such as "connection" and "fixation" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] Although the description of the present invention is made in conjunction with the above specific embodiments, it is obvious that those skilled in the art can make many substitutions, modifications and changes based on the above content. Therefore, all such substitutions, improvements and changes are included within the scope of the appended claims.

Claims

1. A special micro forceps for stoma, characterized in that: It includes two symmetric clamping arms. The upper ends of the two clamping arms are fixedly connected. The clamping arm includes a tweezer arm, a tweezer handle, and a tweezer blade. The upper end of the tweezer arm is connected to the tweezer handle, and the lower end of the tweezer arm is connected to the tweezer blade. The tweezer blade includes at least one clamping portion. The clamping portion includes a first connecting section, a second connecting section, and an intermediate section extending in a horizontal straight line direction. One end of the intermediate section close to the tweezer arm is connected to the first connecting section, and the other end of the intermediate section far from the tweezer arm is connected to the second connecting section. The angles between the first connecting section and the intermediate section and between the second connecting section and the intermediate section are both obtuse angles. The first connecting section, the intermediate section, and the second connecting section are smoothly transitioned at the joints. Guide edges are provided on the outer edges of the first connecting section, the intermediate section, and the second connecting section, and the cross-section of the guide edge is an isosceles rounded trapezoid; When the clamping portions are arranged in a vertical straight line direction, the clamping portions are evenly spaced, and the areas of the clamping portions gradually decrease from bottom to top; The number of the clamping portions is two to five, and the clamping portions are arranged in a horizontal straight line direction or in a vertical straight line direction; When the clamping portions are arranged in a horizontal straight line direction, the clamping portions are connected in sequence to form a whole, the axes of the intermediate sections of the clamping portions are collinear, and the areas of the clamping portions gradually decrease in the direction away from the tweezer arm.

2. The microsurgical forceps dedicated to stoma according to claim 1, wherein: The included angle between the axis of the tweezer arm and the axis of the intermediate section is a, and 90°≤a≤145°.

3. The microsurgical forceps dedicated to stoma according to claim 1, characterized in that: The length of the clamping portion in the horizontal direction is L, and 2mm≤L≤7mm.

4. The micro forceps for stoma special use according to claim 1, wherein: The angle between the first connecting section and the intermediate section is 125°-135°, and the angle between the second connecting section and the intermediate section is 125°-135°.

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