Disclosure of Invention
The invention aims to provide a front end cap component and a choledochoscope stone-taking basket, which can enlarge the area of an opening, reduce the difficulty of the opening, improve the qualification rate of products, and reduce the outer diameter of an end cap body to 1mm or the outer diameter of the end cap body to be smaller than 1mm during processing.
In order to achieve the above purpose, the present invention provides the following technical solutions:
In a first aspect, the present invention provides a front end cap assembly comprising an end cap body and a spacing connector sleeved on the end cap body;
the part of the end cap body extending into the limiting connecting piece is provided with a plurality of through holes for penetrating basket wires, and each through hole is formed in the side face of the end cap body;
and a limiting cavity for limiting the position of the basket wires is formed between the limiting connecting piece and the end cap body.
Further, each of the through holes is distributed at a different height of the end cap body.
Further, the plurality of through holes comprise at least one first through hole and at least one second through hole, the axis of the first through hole and the axis of the second through hole form an included angle, and the first through hole and the second through hole are distributed at intervals along the height direction of the end cap body.
Further, the first through holes are arranged in two, and the second through holes are arranged in one.
Further, the axes of any two through holes have an included angle.
Further, along the height direction of the end cap body, the included angles between the axes of two adjacent through holes are the same.
Further, the portion of the end cap body extending into the spacing connector includes a polygonal structure having an even number of sides, each through hole extending through a pair of oppositely disposed sides of the polygonal structure.
Further, a part of the end cap body extending into the limiting connecting piece and/or the inner wall of the limiting connecting piece is provided with a limiting groove, and the limiting groove is used for accommodating the basket wires.
In a second aspect, the invention further provides a choledochoscope stone removing basket, which comprises basket wires, a storage component, a handle, a guy rope mechanism and the front end cap component according to the scheme, wherein the basket wires are arranged on the end cap body in a penetrating mode, the storage component is connected with the handle, and the guy rope mechanism penetrates through the handle and is connected with one end, away from the end cap body, of the basket wires.
Further, the storage assembly comprises a capacity-increasing pipe and an elastic pipe, one end of the elastic pipe is connected with the handle, the other end of the elastic pipe is connected with the capacity-increasing pipe, and the inner diameter of the capacity-increasing pipe is larger than that of the elastic pipe.
The front end cap component and the choledochoscope stone-taking basket provided by the invention have the following beneficial effects:
Compared with the prior art, the front end cap assembly provided by the first aspect of the invention gets rid of the traditional mode that the end face of the front end cap is provided with the penetrating holes to weave the basket wires, and is changed into the mode that the side face of the end cap body is provided with a plurality of through holes, the positions of the basket wires are limited through the limiting cavity between the limiting connecting piece and the end cap body, the open area is enlarged, the open difficulty is reduced, the product qualification rate is improved, the outer diameter size of the end cap body can be reduced to 1mm or is smaller than 1mm during processing, even if the number of the basket wires is increased, the outer diameter of the end cap body is not required to be greatly increased or even increased, and the popularization of the choledochoscope stone extraction technology is facilitated.
Compared with the prior art, the choledochoscope stone-taking basket provided by the second aspect of the invention can smoothly take stone under a direct-view state through a choledochoscope forceps channel, does not need to inject contrast agent, reduces operation time, and has the advantages of safe and reliable structure and lower cost.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected via an intervening medium, or in communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The following describes specific embodiments of the present invention in detail with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the invention, are not intended to limit the invention.
An embodiment of the first aspect of the present invention is to provide a front end cap assembly, as shown in fig. 3 and 4, comprising an end cap body 2 and a limiting connector 3 sleeved on the end cap body 2, wherein a part of the end cap body 2 extending into the limiting connector 3 is provided with a plurality of through holes 21 for penetrating basket wires 4, each through hole is formed on the side surface of the end cap body 2, and a limiting cavity 5 for limiting the position of the basket wires 4 is formed between the limiting connector 3 and the end cap body 2.
Specifically, during assembly, the plurality of basket wires 4 can be correspondingly arranged through the plurality of through holes in a penetrating mode to weave, and then the limiting connecting piece 3 is connected with the end cap body 2 to limit the positions of the basket wires 4 relative to the end cap body. Therefore, in the assembly process, one basket wire 4 only needs to pass through one through hole, and compared with the prior art that one basket wire 4 needs to pass through two penetrating holes 1, the assembly process is simpler. In addition, the through hole in the front end cap component is formed in the side face of the end cap body 2, so that the opening area is enlarged, the opening difficulty is reduced, the product qualification rate is effectively improved, the outer diameter size of the end cap body can be reduced to 1mm or the outer diameter size of the end cap body is smaller than 1mm during processing, the front end cap component can smoothly enter a choledochoscope forceps channel, and stone extraction is performed under a direct vision state through a choledochoscope.
As shown in fig. 3 and fig. 4, the limiting connecting piece 3 has a cylindrical structure, and the limiting connecting piece 3 and the end cap body 2 can be connected by adopting a threaded connection, a clamping connection, a welding connection and other connection modes.
Of course, the spacing connector 3 is not limited to the above structure, and any structure can be formed between the spacing connector and the end cap body 2 to define the spacing cavity 5 for the position of the basket wires 4.
The distribution of the plurality of through holes 21 is specifically described as follows:
In some embodiments, as shown in fig. 3-4, the various through holes are distributed at different heights of the end cap body 2.
The above-mentioned setting can avoid appearing the condition that the through-hole concentrates the distribution on a certain cross section of end cap body 2, is convenient for carry out the trompil to end cap body 2 in the course of working, and can effectively avoid having to interfere between each basket silk 4.
On the basis of the above embodiment, as shown in fig. 4, the axial direction of each through hole is parallel to the cross section of the end cap body 2, and independent arrangement of each through hole is realized.
According to the arrangement type of the plurality of through holes 21, the following two embodiments can be specifically classified:
embodiment one:
In the first embodiment, as shown in fig. 5 and 6, the plurality of through holes 21 includes at least one first through hole 211 and at least one second through hole 212, the axis of the first through hole 211 and the axis of the second through hole 212 form an included angle, and the first through hole 211 and the second through hole 212 are distributed at intervals along the height direction of the end cap body 2.
As will be described in detail below with reference to fig. 5, the first through holes 211 are configured to be used for threading the first basket wires 4, the second through holes 212 are configured to be used for threading the second basket wires 4, and the second through holes 212 are located below the first through holes 211.
As will be described specifically with reference to fig. 6, two first through holes 211 are provided, the two first through holes 211 are vertically distributed, and two basket wires 4 are correspondingly threaded through the two first through holes 211, one second through hole 212 is provided, and along the height direction of the end cap body 2, the second through hole 212 is located between the two first through holes 211, and the second through hole 212 is used for threading a third basket wire 4.
Specifically, in fig. 5 and 6, the axes of the first through hole 211 and the second through hole 212 are parallel to the cross section of the end cap body 2, and the angle between the axis of the first through hole 211 and the axis of the second through hole 212 is 90 °.
In the first embodiment, as the number of the first through holes 211 and the second through holes 212 increases, the height of the end cap body 2 can be increased by a processing personnel, so as to provide a larger open area, the outer diameter of the end cap body 2 does not need to be enlarged, the outer diameter of the end cap body 2 can be increased to allow one basket wire 4 to traverse, the other basket wires 4 sequentially traverse through the through holes below the basket wires, and the outer diameter of the end cap body 2 can be reduced to 1mm or the outer diameter thereof is smaller than 1mm.
Embodiment two:
in the second embodiment, as shown in fig. 7, the axes of any two through holes have an included angle.
The structure avoids the phenomenon that after the basket is formed by weaving the basket wires 4 on the longitudinal section of the end cap body 2 at the same time by the axes of any two through holes, the basket wires 4 are distributed more uniformly along the circumferential direction of the basket, and extension paths of the basket wires 4 are not overlapped.
In the second embodiment, along the height direction of the end cap body 2, the included angles between the axes of two adjacent through holes are the same, so that after the assembly is completed, the basket wires 4 are uniformly distributed along the circumferential direction of the basket.
The number of the through holes can be two, three, four, five and the like, and the included angles between the axes of two adjacent through holes correspond to 90 degrees, 60 degrees, 45 degrees, 36 degrees and the like respectively.
As shown in fig. 7, three through holes are configured, namely, a third through hole 213, a fourth through hole 214 and a fifth through hole 215, the third through hole 213, the fourth through hole 214 and the fifth through hole 215 are spirally arranged, an included angle between axes of two adjacent through holes is 60 degrees, and each through hole is correspondingly penetrated with one basket wire 4.
The structure of the cap body 2 is specifically described below:
In some embodiments, to facilitate alignment of the respective through holes, the portion of the end cap body 2 extending into the spacing connector 3 includes a polygonal prism structure having an even number of sides, each through hole extending through a pair of sides of the polygonal prism that are disposed opposite each other.
As shown in fig. 6, the portion of the end cap body 2 extending into the spacing connector 3 includes a quadrangular prism structure, each first through hole 211 penetrates through a pair of side surfaces of the quadrangular prism structure, each second through hole 212 penetrates through another pair of side surfaces of the quadrangular prism structure, as shown in fig. 7, the portion of the end cap body 2 extending into the spacing connector 3 includes a hexagonal prism structure, a third through hole 213 penetrates through a pair of side surfaces of the hexagonal prism structure, a fourth through hole 214 penetrates through another pair of side surfaces of the hexagonal prism structure, and a fifth through hole 215 penetrates through the last pair of side surfaces of the hexagonal prism structure.
In some embodiments, the end cap body 2 further comprises a head portion and a connecting portion, two ends of the connecting portion are respectively connected with the head portion and the polygon prism structure, and the limiting connecting piece 3 is sleeved outside the connecting portion and the polygon prism structure.
The shape of the head may be various, for example, the shape of the head may be tapered, semicircular, or the like.
In at least one embodiment, as shown in FIG. 6, the head is tapered in shape with rounded ends.
A preferred embodiment of the front end cap assembly is described in detail below:
In some embodiments, the portion of the end cap body 2 extending into the spacing connector 3 and/or the inner wall of the spacing connector 3 has a spacing groove for receiving the basket wires 4, ensuring stability of the position of the basket wires 4 relative to the end cap assembly.
Specifically, only a portion of the end cap body 2 extending into the spacing connector 3 may have the first spacing groove 22, and the cross section of the first spacing groove 22 may be semicircular, rectangular, or the like.
It is also possible to have only the second limiting groove 31 on the inner wall of the limiting connector 3, and the cross section of the second limiting groove 31 may be semicircular, rectangular, or the like.
Of course, in at least one embodiment, as shown in fig. 8, the portion of the end cap body 2 extending into the limiting connecting piece 3 has a first limiting groove 22, and meanwhile, the inner wall of the limiting connecting piece 3 has a second limiting groove 31, and the second limiting groove 31 and the first limiting groove 22 are buckled together to limit the basket wires 4.
As shown in fig. 8, the first limiting groove 22 extends from the end of the through hole to the bottom end of the end cap body 2, and the second limiting groove 31 is opposite to the first limiting groove 22. Each through hole corresponds to two first limit grooves 22 and two second limit grooves 31, namely a pair of first limit grooves 22 and second limit grooves 31 which are mutually buckled together limit the basket wires 4 extending out of one end of the through hole.
An embodiment of the second aspect of the present invention is to provide a choledochoscope stone removing basket, as shown in fig. 9, where the choledochoscope stone removing basket provided by the embodiment of the second aspect of the present invention includes a basket wire 4, a receiving component 6, a handle 7, a cable mechanism 8 and the front end cap component, the basket wire 4 is threaded on the end cap body 2, the receiving component 6 is connected with the handle 7, and the cable mechanism 8 is connected with an end of the basket wire 4, which is far away from the end cap body 2, through the handle 7.
In the process of taking out stones from biliary tract, the duodenal papilla is firstly cut, the biliary tract is conveniently accessed into biliary tract, the biliary tract is probed by the biliary tract to determine the position of the stones, then the stones are placed into the stones-taking basket through the biliary tract, the handle 7 is held by the hand, the handle 7 is provided with a liquid injection port 71, under the direct vision of the biliary tract, the basket formed by a plurality of basket wires 4 is pushed out from the storage assembly 6 through the inhaul cable mechanism 8, the basket is opened, after the stones are completely wrapped by the basket, the basket is closed through the inhaul cable mechanism 8, the stones are grasped, the stones are slowly taken out of the bile duct, and the stones taking step is completed.
As shown in fig. 9, the accommodating component 6 includes a capacity-increasing tube 61 and an elastic tube 62, one end of the elastic tube 62 is connected with the handle 7, the other end of the elastic tube 62 is connected with the capacity-increasing tube 61, and the inner diameter of the capacity-increasing tube 61 is larger than the inner diameter of the elastic tube 62. Because the inner diameter of the elastic tube 62 is smaller, the capacity-increasing tube 61 can increase the basket retraction space, and difficult basket income is avoided.
The capacity-increasing pipe 61 may be a hypotube, a spring tube, a braided tube, or the like.
Specifically, the capacity-increasing pipe 61 and the elastic pipe 62 are welded.
In some embodiments, the outer surface of the compatibilizer tube 61 is sprayed or overmolded with a low coefficient of friction material to allow the leading end of the stone removal basket to pass smoothly through the endoscopic forceps channel.
Wherein the material with low friction coefficient can be resin, polymer coating material or lubricating oil lipid material.
In at least one embodiment, the low coefficient of friction material is PTFE (Poly tetra fluoroethylene ).
In addition, as shown in fig. 9, the cable mechanism 8 includes a cable assembly 81 and a cable handle 82, one end of the cable assembly 81 is connected to a basket composed of a plurality of basket wires 4 through a connecting member, and the other end is connected to the cable handle 82.
In summary, embodiments of the first and second aspects of the present invention provide a front end cap assembly and a choledochoscope stone removal basket having the following advantages:
1. the side surface of the end cap body 2 is provided with a plurality of through holes, the position of the basket wires 4 is limited through a limiting cavity 5 between the limiting connecting piece 3 and the end cap body 2, the open area is enlarged, the open difficulty is reduced, and the product qualification rate is improved;
2. The outer diameter of the end cap body can be reduced to 1mm or smaller than 1mm during processing, and even if the number of the basket wires is increased, the outer diameter of the end cap body does not need to be greatly increased or even increased, so that the popularization of the choledochoscope stone extraction technology is facilitated;
3. When in assembly, one basket wire 4 only needs to pass through one through hole, and the assembly process is simpler;
4. the part of the cap body 2 extending into the limit connecting piece 3 and/or the inner wall of the limit connecting piece 3 are provided with limit grooves, so that the basket is ensured to have good stability;
5. The end part of the elastic tube 62 is welded with a capacity-increasing tube 61, so that the retraction space of the basket can be increased, and difficult basket retraction is avoided.
It should be noted that the above embodiments are merely for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that the technical solution described in the above embodiments may be modified or some or all of the technical features may be equivalently replaced, and these modifications or substitutions do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the present invention.