CN212165857U - One shot forming's tool bit subassembly and micro-scissors - Google Patents
One shot forming's tool bit subassembly and micro-scissors Download PDFInfo
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- CN212165857U CN212165857U CN202020405506.1U CN202020405506U CN212165857U CN 212165857 U CN212165857 U CN 212165857U CN 202020405506 U CN202020405506 U CN 202020405506U CN 212165857 U CN212165857 U CN 212165857U
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Abstract
The utility model provides a one shot forming cutter head subassembly and micro-scissors, is including first cutter head, second cutter head and driving piece, the driving piece is fixed in just be used for driving between first cutter head and the second cutter head first cutter head with second cutter head intermeshing, first cutter head with the second cutter head sets up relatively, the cutting end of first cutter head or the cutting end of second cutter head still are provided with the sword point portion, and this one shot forming cutter head subassembly can realize once taking shape preparation blood vessel side fistula, reduces operation steps and time, avoids cuting the blood vessel many times, and the side fistula is local smooth, the edge is neat, can effectively reduce vascular tissue and the tissue damage under the blood vessel, reduces the probability of vascular embolism and spasm after the art, has fine improvement the operation effect, and the structure is simple and easy.
Description
Technical Field
The utility model belongs to the technical field of micro-scissors and specifically relates to an one shot forming's tool bit subassembly and micro-scissors.
Background
Arteriovenous internal fistula is a vascular way for maintaining hemodialysis of a patient with chronic renal failure, and the quality of the internal fistula has important influence on the dialysis effect and the long-term survival of the patient. Since Brescia and the like successfully establish arteriovenous internal fistula by subcutaneous anastomosis of a radial artery and a cephalic vein for the first time in 1966, arteriovenous internal fistula formation has become the treatment first choice for patients who need hemodialysis for renal function damage caused by various diseases such as various chronic glomerulonephritis, diabetic nephropathy, hypertensive renal arteriosclerosis, renal failure, polycystic kidney, lupus erythematosus and the like. At present, a plurality of operation modes are available for internal arteriovenous fistula formation at home and abroad, wherein brachiocephalic vein-radial artery end-side anastomosis is still the first operation mode of internal arteriovenous fistula at home.
The commonly adopted operation method for manufacturing the side fistula of the blood vessel at present in China is to free the blood vessel, suspend the side wall of the artery by using a microscopic suture and manufacture the side fistula by using a common microsciscope, but the existing microscopical curved scissors have the following defects:
1. because the radian of the scissor head of the existing microscissors is insufficient, the existing microscissors are mostly straight and half-moon shaped, and cannot form and prepare vascular side fistula (meniscus, ellipse, semicircle and circle) at one time, the existing microscissors can only be realized by trimming for many times, but trimming for many times aggravates vascular anastomotic stoma damage, causes local unsmooth, irregular edges and tissue contusion, and increases the probability of postoperative vascular embolism and spasm.
2. Because the angle of the scissor head and the handle of the existing micro-curved scissors is designed by cutting the side fistula for multiple times, the long blood vessel length needs to be separated by cutting the tissue under the blood vessel, so that the blood vessel is lifted to a certain height and then cut (because the pen-type micro-scissors need to be held, the hand of an operator needs to be placed on an operating table to keep stable operation). During operation, the suture needs to penetrate the blood vessel and then the blood vessel needs to be pulled and lifted, and the pulling and the separation of the blood vessel are easy to cause the blood vessel damage, thereby increasing the probability of spasm and postoperative embolism. The method for holding the micro curved scissors correctly is a pen-holding type, and because the included angle between the holding handle and the scissor head of the micro curved scissors is too large, the blood vessel needs to be lifted to a higher height, and the blood vessel injury is aggravated.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at avoiding the weak point among the prior art and providing an one shot forming's tool bit subassembly, this one shot forming's tool bit subassembly can realize once taking shape and prepare blood vessel side fistula, reduces operation steps and time, avoids cuting the blood vessel many times, and side fistula is local smooth, the edge is neat, can effectively reduce vascular tissue and the damage of blood vessel tissue down, reduces the probability of postoperative blood vessel embolism and spasm, has fine improvement the operation effect, and the structure is simple and easy.
The embodiment of the utility model provides a one shot forming cutter head subassembly, including first cutter head, second cutter head and driving piece, the driving piece is fixed in just be used for driving between first cutter head and the second cutter head first cutter head with second cutter head intermeshing, first cutter head with the second cutter head sets up relatively, the cutting end of first cutter head or the cutting end of second cutter head still are provided with the sword point portion.
Furthermore, the first tool bit comprises a first fixed seat and a first cutting surface, the first cutting surface is fixed on the first fixed seat, and a first cutting edge is arranged at one end, far away from the first fixed seat, of the first cutting surface.
Furthermore, the tool nose portion is arranged at the cutting end of the first cutting surface, and the first cutting edge is arranged on the tool nose portion.
Furthermore, the second cutter head comprises a second fixed seat and a second cutting surface, the second cutting surface is fixed on the second fixed seat, and a second cutting edge is arranged at one end, far away from the first fixed seat, of the second cutting surface.
Furthermore, the first cutting surface and the second cutting surface are both arranged in an arc shape, and the first cutting surface and the second cutting surface are meshed with each other.
Furthermore, the first cutting surface and the second cutting surface are both in a fillet trapezoid shape, and the first cutting surface and the second cutting surface are meshed with each other.
Further, the cutting width Ld when the first cutter head and the second cutter head are engaged is 2 to 7 mm.
Further, the cutting depth Lj when the first tool bit and the second tool bit are engaged is 0.5mm-1 mm.
Furthermore, the driving piece comprises a first driving rod and a second driving rod, the first driving rod and the second driving rod are arranged in a crossed mode and are connected in a rotating mode through bearings, one end of the first driving rod is fixedly connected with the first tool bit, and one end of the second driving rod is fixedly connected with the second tool bit.
The embodiment also provides microscissors which comprise a cutter handle and the one-step forming cutter head assembly, wherein the cutter handle is fixed at one end of the one-step forming cutter head and used for controlling the one-step forming cutter head to open and close.
Compared with the prior art, the utility model has the advantages that: because the cutting end of first tool bit or second tool bit is provided with the sword point portion, thereby make the tool bit subassembly play in the middle of the process of using and fix a position earlier antiskid to the easy gliding blood vessel and progressively cut the effect, cooperate the relative meshing between first tool bit and the second tool bit simultaneously, make the tool bit subassembly not only can realize once forming preparation blood vessel side fistula in the middle of the process of using, reduce operation steps and time, still avoid cuting the blood vessel many times simultaneously, the side fistula is local smooth, the edge is neat, can effectively reduce vascular tissue and the tissue damage under the blood vessel, reduce the probability of postoperative vascular embolism and spasm, the operation effect has been improved very well, and the structure is simple and easy.
Drawings
The invention is further described with the aid of the accompanying drawings, in which, however, the embodiments do not constitute any limitation to the invention, and for a person skilled in the art, other drawings can be derived from the following drawings without inventive effort.
Fig. 1 is a schematic overall structure diagram of an one-time molding head assembly in one embodiment.
Fig. 2 is a schematic view of the first and second cutting heads according to the first embodiment.
Fig. 3 is a rear view of the first and second cutting heads of the first embodiment.
Fig. 4 is a schematic view of the first and second cutting heads engaging one another in accordance with a first embodiment.
Fig. 5 is a schematic view of the first and second tips of the second embodiment.
Fig. 6 is a schematic view of the first and second tips engaging each other in the second embodiment.
Fig. 7 is a schematic view of the overall structure of a pair of microscissors in the third embodiment.
The figure includes: the cutting tool comprises a first tool bit 1, a first fixed seat 11, a first cutting surface 12, a first cutting edge 13, a second tool bit 2, a second fixed seat 21, a second cutting surface 22, a second cutting edge 23, a driving part 3, a first driving rod 31, a second driving rod 32, a bearing 33, a cutting edge part 4, a blood vessel 5 and a tool shank 6.
Detailed Description
The invention will be further described with reference to the following examples.
Example one
As shown in fig. 1-3, an embodiment of the present invention provides an one-step forming cutter head assembly, which includes a first cutter head 1, a second cutter head 2 and a driving member 3, wherein the driving member 3 is fixed between the first cutter head 1 and the second cutter head 2 and is used for driving the first cutter head 1 and the second cutter head 2 to engage with each other, a cutting end of the first cutter head 1 and a cutting end of the second cutter head 2 are oppositely disposed, the cutting end of the first cutter head 1 or the cutting end of the second cutter head 2 is further provided with a cutting tip portion 4, since the cutting end of the first cutter head 1 or the cutting end of the second cutter head 2 is provided with the cutting tip portion 4, the cutter head assembly performs the functions of positioning at first, preventing slipping and cutting gradually on a blood vessel 5 during use, and simultaneously cooperates with the relative engagement between the first cutter head 1 and the second cutter head 2 to make the cutter head assembly perform use, only the driving piece needs to be pinched to be close to drive the first tool bit 1 and the second tool bit 2 to move oppositely, so that the side fistula of the blood vessel 5 can be prepared in one-step forming, the operation steps and time of the operation are reduced, the blood vessel 5 is prevented from being cut for many times, the side fistula is locally smooth and neat in edge, the tissue damage of the blood vessel 5 and the tissue damage under the blood vessel 5 can be effectively reduced, the probability of embolism and spasm of the blood vessel 5 after the operation is reduced, the operation effect is well improved, and the structure is simple and easy to implement.
As shown in fig. 2-3, in a preferred embodiment, the first cutting head 1 includes a first fixing seat 11 and a first cutting surface 12, the first cutting surface 12 is perpendicularly fixed on the first fixing seat 11, a first cutting edge 13 is disposed at an end of the first cutting surface 12 away from the first fixing seat 11, further, the nose portion 4 is disposed at a cutting end of the first cutting surface 12, and the first cutting edge 13 is disposed on the nose portion 4.
As shown in fig. 2-3, in a preferred embodiment, the second cutting head 2 includes a second fixing seat 21 and a second cutting surface 22, the second cutting surface 22 is perpendicularly fixed on the second fixing seat 21, a second cutting edge 23 is disposed at an end of the second cutting surface 22 away from the first fixing seat 11, the first cutting surface 12 and the second cutting surface 22 are disposed in parallel, and the first cutting edge 13 and the second cutting edge 23 are disposed opposite to each other.
Because the nose portion 4 is disposed on the first cutting surface 12 and the first cutting edge 13 is disposed at the periphery of the nose portion, and the second cutting edge 23 disposed at the periphery of the second cutting surface 22 is also engaged, so that the two cutting edges of the cutter head assembly are disposed oppositely, when the first cutter head 1 and the second cutter head 2 move oppositely, the two cutting edges can achieve a shearing effect. Therefore, when the blood vessel 5 is cut, only the first tool bit 1 and the second tool bit 2 are meshed with each other, and a hole can be cut on the wall of the blood vessel 5; meanwhile, the shape of the hole is determined according to the bending shape of the bending part, and the bending shape of the bending part can be changed as required to cut holes in different shapes.
As shown in fig. 2-3, in a preferred embodiment, the first cutting surface 12 and the second cutting surface 22 are both arc-shaped, and further, the first cutting surface 12 and the second cutting surface 22 are both semi-arc-shaped, the first cutting surface 12 and the second cutting surface 22 are engaged with each other, and the mouth of the cut blood vessel 5 is arc-shaped due to the arc-shaped cutter head assembly or the semi-arc-shaped cutter head assembly, so as to avoid tissue damage and operation failure caused by multiple cutting; wherein the cutter head component arranged in an arc shape or a semicircular shape is mainly used for the arteriostomy.
In a preferred embodiment, the cutting width Ld at engagement between the first tool bit 1 and the second tool bit 2 is 2-7mm, as shown in fig. 4.
In a preferred embodiment, the depth of cut Lj in the engagement between the first tool bit 1 and the second tool bit 2 is 0.5mm to 1mm, as shown in fig. 4.
As shown in fig. 1, in a preferred embodiment, the driving member 3 includes a first driving rod 31 and a second driving rod 32, the first driving rod 31 and the second driving rod 32 are disposed in an intersecting manner and rotatably connected through a bearing 33, one end of the first driving rod 31 is fixedly connected to the first fixing seat 11 of the first tool bit 1, and one end of the second driving rod 32 is fixedly connected to the second fixing seat 21 of the second tool bit 2.
Example two
As shown in fig. 5, the present embodiment is different from the first embodiment in that: in another preferred embodiment, the first cutting surface 12 and the second cutting surface 22 are both in a rounded trapezoid arrangement, the first cutting surface 12 and the second cutting surface 22 are mutually engaged, and the tool bit assembly is in a rounded trapezoid arrangement, and the rounded trapezoid smooth transition at the corner can avoid stress concentration and damage of the blood vessel 5; wherein the cutter head component arranged in a round trapezoid shape is mainly used for vein fistulization.
In a preferred embodiment, the cutting width Ld at engagement between the first tool bit 1 and the second tool bit 2 is 2-7mm, as shown in fig. 6.
In a preferred embodiment, the depth of cut Lj in the engagement between the first tool bit 1 and the second tool bit 2 is 0.5mm to 1mm, as shown in fig. 6.
The benefit of this embodiment is that the rounding off at the corners can avoid stress concentrations and vessel 5 damage, with the blade assembly of the rounded trapezoid being used primarily for vein fistulization access.
EXAMPLE III
As shown in fig. 7, this embodiment provides a pair of microscissors, which includes a tool shank 6 and the above-mentioned primary forming tool bit assembly, where the tool shank 6 is fixed to one end of the primary forming tool bit and is used to control the opening and closing of the primary forming tool bit, and the tool shank 6 and the primary forming tool bit assembly are arranged perpendicular to each other; when shearing, need make two handles on the scissors with hard and be close to in order to drive the tool bit subassembly and move in opposite directions, realize shearing.
Compared with the prior art, the utility model has the advantages that: because the cutting end of first tool bit or second tool bit is provided with the sword point portion, thereby make the tool bit subassembly carry out earlier the antiskid of location to the gliding blood vessel in the middle of the process of using and progressively cut the effect, the relative meshing between first tool bit and the second tool bit of cooperation simultaneously, make the tool bit subassembly not only can realize once forming preparation blood vessel side fistula in the middle of the process of using, reduce operation steps and time, still avoid cuting the blood vessel many times simultaneously, the side fistula is local smooth, the edge is neat, can effectively reduce vascular tissue and the tissue damage under the blood vessel, reduce postoperative vascular embolism and spasm's probability, the fine operation effect that has improved, moreover, the steam generator is simple in structure.
It should be finally noted that the above embodiments are only intended to illustrate the technical solutions of the present invention, and not to limit the scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention can be modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. The utility model provides a one shot forming cutter head subassembly which characterized in that: including first tool bit, second tool bit and driving piece, the driving piece is fixed in just be used for driving between first tool bit and the second tool bit first tool bit with second tool bit intermeshing, first tool bit with the second tool bit sets up relatively, the cutting end of first tool bit or the cutting end of second tool bit still are provided with the sword point portion.
2. The one-shot forming head assembly of claim 1, wherein: the first cutter head comprises a first fixed seat and a first cutting surface, the first cutting surface is fixed on the first fixed seat, and a first cutting edge is arranged at one end, far away from the first fixed seat, of the first cutting surface.
3. The one-shot forming head assembly of claim 2, wherein: the tool point portion is arranged at the cutting end of the first cutting surface, and the first cutting edge is arranged on the tool point portion.
4. A one-shot forming head assembly as defined in claim 3, wherein: the second cutter head comprises a second fixed seat and a second cutting surface, the second cutting surface is fixed on the second fixed seat, and a second cutting edge is arranged at one end, far away from the first fixed seat, of the second cutting surface.
5. The one-shot forming head assembly of claim 4, wherein: the first cutting surface and the second cutting surface are both arranged in an arc shape, and the first cutting surface and the second cutting surface are meshed with each other.
6. The one-shot forming head assembly of claim 4, wherein: the first cutting surface and the second cutting surface are both in a fillet trapezoid shape, and the first cutting surface and the second cutting surface are meshed with each other.
7. The one-shot forming head assembly of claim 1, wherein: the cutting width Ld when the first cutter head is engaged with the second cutter head is 2-7 mm.
8. The one-shot forming head assembly of claim 1, wherein: the cutting depth Lj when the first tool bit and the second tool bit are engaged is 0.5mm-1 mm.
9. The one-shot forming head assembly of claim 1, wherein: the driving piece comprises a first driving rod and a second driving rod, the first driving rod and the second driving rod are arranged in a crossed mode and are connected in a rotating mode through bearings, one end of the first driving rod is fixedly connected with the first tool bit, and one end of the second driving rod is fixedly connected with the second tool bit.
10. A pair of microscissors, characterized in that: the one-time forming cutter head assembly comprises a cutter handle and the one-time forming cutter head assembly as claimed in any one of claims 1 to 9, wherein the cutter handle is fixed at one end of the one-time forming cutter head and is used for controlling the one-time forming cutter head to open and close.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020405506.1U CN212165857U (en) | 2020-03-26 | 2020-03-26 | One shot forming's tool bit subassembly and micro-scissors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020405506.1U CN212165857U (en) | 2020-03-26 | 2020-03-26 | One shot forming's tool bit subassembly and micro-scissors |
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| Publication Number | Publication Date |
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| CN212165857U true CN212165857U (en) | 2020-12-18 |
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| CN202020405506.1U Active CN212165857U (en) | 2020-03-26 | 2020-03-26 | One shot forming's tool bit subassembly and micro-scissors |
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| CN (1) | CN212165857U (en) |
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- 2020-03-26 CN CN202020405506.1U patent/CN212165857U/en active Active
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