CN115814238A

CN115814238A - Microgroove drainage stent tube

Info

Publication number: CN115814238A
Application number: CN202211325622.2A
Authority: CN
Inventors: 蒋军辉; 程跃; 严泽军
Original assignee: Ningbo First Hospital
Current assignee: Ningbo First Hospital
Priority date: 2021-05-08
Filing date: 2021-05-08
Publication date: 2023-03-21
Also published as: CN113262377B; CN113262377A; CN115920198A

Abstract

The invention provides a microgroove drainage stent which is provided with at least two microgrooves and a guide wire channel, wherein the microgrooves are positioned outside the guide wire channel and extend in accordance with the guide wire channel, the microgrooves are provided with extension openings, the extension openings are communicated with the external space, and the microgroove drainage stent is suitable for being arranged in a human ureter.

Description

Microgroove drainage stent tube

Technical Field

The invention relates to the field of medical supplies, in particular to a microgroove drainage stent tube.

Background

The double J-shaped tube is also called double pigtail tube, and is named because the two ends are curled and each end is shaped like a pigtail. The double J tube has the functions of stent and drainage, can relieve temporary obstruction caused by ureter inflammation and edema, and can prevent postoperative wound urine leakage and ureter stenosis. Meanwhile, the integrated system is not directly communicated with the outside, so that bleeding and infection caused by nephrostomy can be avoided; because of no restriction and uncomfortable feeling of the external drainage tube, the patient can get out of bed for activity in early period, which is beneficial to postoperative rehabilitation.

The common double J tube is formed by a thin tubular main body, and a plurality of through holes are formed in the tube wall. The two ends of the guide wire are elastic curled structures which can be straightened under the guide of the guide wire. The central channel of the common double J tube is communicated with the two ends.

The double J-tube forms a supporting space in the ureter by virtue of the tubular structure of the double J-tube, prevents the contraction of the ureter after operation to compensate the urinary tract, and therefore, the double J-tube plays a role of a bracket.

The double J-tubes are typically of the type size F4-F8, that is, the central channel size is only 1.3 to 2.5 mm. So that its internal central passage is not the drainage passage of the body. Although the double J tube has a channel inside, the working principle is that the drainage is performed along the outer wall of the double J tube instead of the central channel by virtue of the peristalsis action of the ureter.

In the process of clinical use of the double J-tube, particularly after kidney stones or ureteral stone operations, sundries such as broken stones exist in urine, and under the condition, the ureter is easy to be blocked, namely, the phenomenon of unsmooth drainage of the double J-tube occurs.

On the other hand, due to the small inner size of the double-J tube, a small amount of liquid entering the double-J tube carries foreign matters such as broken stone powder or blood clots, so that the double-J tube is easy to block.

In addition, based on the structure of the conventional double J-tube, the surface thereof is flat, liquid is guided in the ureter through the gap between the surface thereof and the ureter, and the gap is small, and when the ureter is damaged or after operation, the peristaltic action of the ureter is relatively weakened, so that the dynamic delivery channel between the surface of the double J-tube and the ureter becomes small, and thus clogging is likely to occur.

The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art.

Disclosure of Invention

It is an object of the present invention to provide a micro-groove drainage stent tube, which is formed with a plurality of extended micro-grooves on the outer surface to enlarge a dynamic delivery space between the outer surface of the micro-groove drainage stent tube and a ureter.

It is another object of the present invention to provide a micro-groove drainage stent tube, which includes a plurality of stent leaves formed on the outer surface of a main body to support a ureter while forming the micro-grooves in a spaced manner, that is, the stent leaves have a stent supporting function.

Another object of the present invention is to provide a micro-groove drainage stent tube, wherein at least one curved end of the micro-groove drainage stent tube forms a wedge-shaped head, and the surface of the wedge-shaped head is smooth, so as to conveniently guide the micro-groove drainage stent tube into a human ureter.

It is another object of the present invention to provide a micro-groove drainage stent tube, which forms a plurality of isolated micro-grooves on the surface of a main body, thereby conducting drainage in a shunt-guided manner.

It is another object of the present invention to provide a micro-groove drainage stent tube, wherein the micro-grooves and the inner surface of the ureter form dynamically varying delivery spaces respectively based on the peristaltic process of the human ureter, and the delivery spaces are communicated in a relatively isolated manner, so that the overall blockage is not likely to occur, that is, the probability that all the micro-grooves are blocked is low.

It is another object of the present invention to provide a micro-slotted drainage stent tube, wherein in one embodiment, the layout and volume distribution of the micro-slots are matched to the crimping direction of the crimping head.

It is another object of the present invention to provide a microchannel drainage stent tube, wherein in one embodiment, the microchannel drainage stent tube has at least one covering region covering a partial region of an opening of the microchannel.

In order to achieve at least one of the above objects, an aspect of the present invention provides a microgroove drainage stent tube having at least two microgrooves and a guide wire channel, the microgrooves being located outside the guide wire channel and extending in correspondence with the guide wire channel, the microgrooves having an extension opening communicating with an external space, the microgroove drainage stent tube being adapted to be disposed in a ureter of a human body.

The microgroove drainage stent tube according to one embodiment comprises a main body and at least two stent leaves, wherein the main body forms the guide wire channel, and each stent leaf is approximately vertically arranged along the main body.

The microgroove drainage stent tube according to one embodiment has a guiding state and a curled state, and in the guiding state, the microgroove drainage stent tube is approximately in a straight line state so as to be placed in a ureter of a human body; in the crimped state, at least one end of the microgroove drainage stent tube is crimped.

The micro-groove drainage stent tube according to one embodiment comprises a curled end integrally connected to the main body, wherein one micro-groove extends from an inner bend of the curled end to the main body, and the guide wire channel extends to be communicated with the curled end.

The microchannel drainage stent tube according to one embodiment, wherein one of the microchannels extends from the outer curve of the crimped end to the main body.

The microgroove drainage stent tube according to one embodiment comprises two curled ends, the two curled ends are respectively connected to two ends of the main body in an opposite direction, and the guide wire channel extends to communicate with each curled end.

The microgroove drainage stent tube according to one embodiment, wherein the main body has a communication hole, and the communication hole communicates the guide wire channel of the main body and the microgrooves.

The microgroove drainage stent tube according to one embodiment includes a wedge head disposed at an end of the crimped end.

The microchannel drainage stent tube according to one embodiment comprises a reinforced area, wherein the reinforced area is covered and arranged on a local area of the extending opening of the microchannel.

The microgroove drainage stent tube according to one embodiment comprises a plurality of microgrooves which are evenly distributed around the guide wire channel, the number of the microgrooves is selected from 2, 3, 4 and 5, the overall size model of the microgroove drainage stent tube 1 is F5-F8mm, the microgroove drainage stent tube comprises two curled ends which are respectively connected with two ends of the main body in an opposite mode, the guide wire channel extends to be communicated with each curled end, the main body is provided with a communication hole which is communicated with the guide wire channel of the main body and the microgrooves and comprises a wedge-shaped head, the wedge-shaped head is arranged at the end part of the curled end and comprises a reinforcing area, and the reinforcing area is covered and arranged at a local area of the extending opening of the microgrooves, wherein one the microgroove from the interior bend of curling end extends to the main part, another the microgroove from the outer bend of curling end extends to the main part, and it has a scale sign, the scale sign is used for signalling the length of microgroove drainage support pipe, the microgroove extend open-ended opening size and the microgroove set up the position cooperation, it includes a dado, the dado be arc ground set up in the tip of support page or leaf, adjacent two form a clearance between the dado, the clearance intercommunication microgroove and exterior space, it is a plurality of the dado is set up in a plurality of support page or leaf outside forms roughly annular surface

Drawings

FIG. 1 is a perspective view of a first embodiment of a microgroove drainage stent tube according to the present invention in a crimped state.

FIG. 2 is a schematic cross-sectional view of a micro-slotted drainage stent tube according to a first embodiment of the present invention.

FIG. 3 is a schematic view of the guiding state of a microgroove drainage stent tube according to a first embodiment of the present invention.

FIGS. 4A and 4B are schematic diagrams of the distribution of the micro-grooves of a micro-groove drainage stent tube according to a first embodiment of the invention.

FIG. 5 is a schematic representation of the use of a micro-slotted drainage stent tube according to a first embodiment of the present invention.

FIG. 6 is a variant embodiment of the variation of the microgroove volume of a microgroove drainage stent tube according to a first embodiment of the present invention.

FIGS. 7A-7C are variant embodiments of varying numbers of micro-grooves of a micro-groove drainage stent tube according to a first embodiment of the present invention

FIG. 8 is a schematic perspective view of a microchannel drainage stent according to a second embodiment of the invention.

FIG. 9 is a schematic view of a micro-slotted drainage stent tube 1 according to a third embodiment of the present invention.

FIG. 10 is a partial schematic view of a microchannel drainage stent tube according to a fourth embodiment of the invention.

Detailed Description

The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the invention.

It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for ease of description and simplicity of description, and do not indicate or imply that the referenced devices or components must be in a particular orientation, constructed and operated in a particular orientation, and thus the above terms are not to be construed as limiting the present invention.

It is understood that the terms "a" and "an" should be interpreted as meaning "at least one" or "one or more," i.e., that a quantity of one element may be one in one embodiment, while a quantity of another element may be plural in other embodiments, and the terms "a" and "an" should not be interpreted as limiting the quantity.

References to "one embodiment," "an embodiment," "example embodiment," "various embodiments," "some embodiments," etc., indicate that the embodiment described herein may include a particular feature, structure, or characteristic, but every embodiment may not necessarily include the feature, structure, or characteristic. In addition, some embodiments may have some, all, or none of the features described for other embodiments.

FIG. 1 is a perspective view of a first embodiment of a microgroove drainage stent tube according to the present invention in a crimped state. FIG. 2 is a schematic cross-sectional view of a micro-slotted drainage stent tube according to a first embodiment of the present invention. FIG. 3 is a schematic view of the guiding state of a microgroove drainage stent tube according to a first embodiment of the present invention. FIGS. 4A and 4B are schematic diagrams of the distribution of the micro-grooves of a micro-groove drainage stent tube according to a first embodiment of the invention. FIG. 5 is a schematic representation of the use of a microgroove drainage stent tube according to a first embodiment of the present invention.

Referring to fig. 1 to 5, the present invention provides a micro-groove drainage stent tube 1, wherein the micro-groove drainage stent tube 1 is used to be arranged in a ureter of a human body to form a supporting and drainage function in the ureter, so as to prevent the ureter from contracting and blocking.

The microgroove drainage stent tube 1 is provided with a plurality of microgrooves 101 and a guide wire channel 102, and each microgroove 101 is communicated with the outside and used for conducting drainage. The guide wire channel 102 is located inside and is used for passing through the guide wire 2 and guiding the micro-groove drainage stent tube 1 to enter the human ureter. That is, each of the micro grooves 101 is located outside the guide wire channel, extending in line with the guide wire channel.

Each micro groove 101 has an extended opening 1010, and the extended opening 1010 communicates with the external space. Further, the extension opening 1010 extends longitudinally to communicate with an external space.

In this embodiment of the present invention, the microchannel drainage stent 1 has three microchannels 101, a first microchannel 1011, a second microchannel 1012, and a third microchannel 1013. The first micro groove 1011, the second micro groove 1012 and the third micro groove 1013 are located outside the guide wire channel 102, respectively. Further, the first micro groove 1011, the second micro groove 1012 and the third micro groove 1013 are symmetrically distributed outside the guide wire channel 102 about the central axis of the guide wire channel 102.

It should be noted that, in this embodiment of the present invention, the micro-groove drainage stent tube 1 includes three micro-grooves 101 for illustration, in other embodiments of the present invention, the micro-groove drainage stent tube 1 may also have other numbers and arrangements of the micro-grooves 101, such as four, five, six, etc., and the present invention is not limited in this respect.

It is worth mentioning that the micro-groove drainage stent tube 1 forms a plurality of extended micro-grooves on the outer surface thereof to enlarge a dynamic delivery space between the outer surface of the micro-groove drainage stent tube 1 and the ureter based on the working process of the ureter.

The microgroove drainage stent tube 1 comprises a main body 10 and a plurality of stent leaves 20, wherein the main body 10 forms the guide wire channel 102. That is, the main body 10 has a substantially tubular structure. Each of the holder pages 20 has a substantially sheet-like structure, and extends from a predetermined position at one end of the main body 10 to a predetermined position at the other end of the main body 10 along the extending direction of the main body 10. In this embodiment of the invention, the microchannel drainage stent 1 comprises three stent leaves 20, separated to form three of the microchannels 101. In other embodiments of the invention, the holder pages 20 may be of other numbers and shapes. Preferably, each of the holder pages 20 is substantially perpendicularly attached to the main body 10 in the lateral direction.

It is also worth mentioning that a plurality of the stent leaves 20 extend radially outward from the main body 10 by a predetermined height to form the micro grooves 101, thereby allowing the stent leaves 20 to serve as a stent near the inner wall of the ureter. That is, a plurality of the stent leaves 20 are formed on the outer surface of the main body 10 to support the ureter while partitioning the micro grooves 101, i.e., the stent leaves 20 have a stent supporting function.

The microgroove drainage stent tube 1 forms a plurality of isolated microgrooves 101 on the surface of the main body 10, so that drainage is performed in a shunting guiding manner. That is, the microchannel drainage stent 1 prevents the occurrence of clogging from various aspects, such as the shunting of a plurality of microchannel channels, the expansion of the support of the stent leaves 20, and the extended open space of the microchannels.

It is also worth mentioning that the overall size model of the micro-groove drainage stent tube 1 is F5-F8mm. Preferably F6-F7mm. That is, the overall spatial diameter of the microchannel 101 drainage tube is 1.6mm-2.6mm, and since the diameter of the microchannel drainage stent tube 1 is composed of the main body 10 and the stent sheet 20, and the main body 10 of the guide wire channel 102 functions to pass through the guide wire 2, the guide wire channel 102 can be smaller in size relative to the central channel of the conventional double J-tube, thereby relatively enlarging the dynamic drainage space outside. Namely, the space of the micro-groove formed by extending the stent leaf 20 and the space of the ureteral space.

Referring to fig. 1 and 3, the microgroove drainage stent tube 1 has a guiding state 200 and a curled state 100, and in the guiding state 200, the microgroove drainage stent tube 1 is in a substantially straight state so as to be guided into the body; in the curled state 100, both ends of the microgroove drainage stent tube 1 are in the curled state 100 so as to be fixed in vivo.

Referring to fig. 1, 4a and 4b, the microchannel drainage stent 1 includes two curled ends, a first curled end 30 and a second curled end 40, respectively, and the first curled end 30 and the second curled end 40 are respectively disposed at two ends of the main body 10, so as to fix the position of the microchannel drainage stent 1 after the microchannel drainage stent 1 is disposed in the ureter of the human body. In this embodiment of the present invention, the first curled end 30 and the second curled end 40 are curled in opposite directions, that is, the first curled end 30 and the second curled end 40 are curled in both side directions of the body 10. In other embodiments of the present invention, the first curled end 30 and the second curled end 40 are curled in the same direction, i.e., the first curled end 30 and the second curled end 40 are curled on the same side of the body 10. Preferably, the first curled end 30 and the second curled end 40 are curled back to more stably secure the micro-groove drainage stent tube 1.

The micro grooves 101 extend from the curled end to the body 10, that is, both the curled end and the body 10 have the micro grooves communicating with each other, thereby integrally conducting drainage.

Further, in this implementation of the invention, both the first curled end 30 and the second curled end 40 have the microgrooves 101, that is, the microgrooves 101 extend continuously from one curled end to the other curled end. For example, the micro-groove 101 extends from the first curled end 30 to the body and further to the second curled end 40.

By way of example and not limitation, one of the microgrooves 101 is located on an inner side of the curled ends 30, 40 and the other microgrooves 101 is located on an outer bend of the curled ends.

For example, when the micro-groove drainage stent tube 1 is placed in a human ureter, one end of the micro-groove drainage stent tube is positioned in a renal pelvis of the human body, and the other end of the micro-groove drainage stent tube is positioned in a bladder of the human body, so that a drainage path is established in a ureteral channel of the human body.

In the guiding state 200, the guide wire 2 passes through the guide wire channel 102, so that the microgroove drainage stent tube 1 is straightened or in a roughly linear state, and is conveniently placed in a ureter of a human body; in the curled state 100, the first curled end 30 and the second curled end 40 are in a natural curled state 100, facilitating fixation in a human organ.

In this embodiment of the present invention, the micro-groove drainage stent tube 1 has two curled ends for illustration, that is, a two-end fixing structure of a substantially double-J-tube is formed, in other embodiments of the present invention, the micro-groove drainage stent tube 1 may also have one curled end, that is, a single-end fixing manner, and the present invention is not limited in this respect.

In one embodiment of the invention, three support leaves 20 are uniformly distributed on the outer surface of the main body 10, that is, three uniformly distributed micro grooves 101 are formed on the outer surface of the main body 10. In another embodiment of the present invention, the three stents are non-uniformly distributed, for example, with gradually increasing spacing, for example, the first micro channel 1011 is larger than the second micro channel 1012, and the second micro channel 1012 is larger than the third micro channel 1013.

In this embodiment of the present invention, referring to fig. 1, the opening angles of the first micro groove 1011, the second micro groove 1012 and the third micro groove 1013 are all approximately 120 degrees. The first end of the first micro channel 1011 extends in a curved manner in the inner curve of the first curled end 30, and the second end of the first micro channel 1011 extends in an outer curve of the second curled end 40. The first ends of the second and third

micro grooves

1012, 1013 are symmetrically distributed about an outer bend of the first curled end 30, and the second ends of the second and third

micro grooves

1012, 1013 extend about an inner bend of the second curled end 40. That is, it is bent in an S-shape in reverse.

It is worth mentioning that in this embodiment of the invention, the inner curve of the first curled end 30 has one said micro groove 101, the outer curve has two said micro grooves 101, i.e. the inner flow passage space of the first curled end 30 is smaller than the outer flow passage space, while the inner curve of the second curled end 40 has two said micro grooves 101, the outer curve has one said micro groove 101, i.e. the outer flow passage space of the second curled end 40 is larger than the inner flow passage space, further, in combination with the arrangement direction of the ureters and the direction of gravity, the liquid flows from top to bottom, so that the first curled end 30 is adapted to be arranged above, i.e. to be arranged inside the renal pelvis with a large external flow, and the second curled end 40 is adapted to be arranged below, i.e. under the action of gravity, even if the flow passage is small, the flow of the liquid is not affected.

It should also be noted that, because the two ends of the conventional double J-tube have the same structure, there is no distinction between the upper and lower ends, but in the embodiment of the present invention, the micro-groove drainage stent tube 1 has the distinction between the upper and lower positions, or corresponds to the organ at a specific position, based on the different structural distribution at the two ends, which is matched with the drainage position. The first curled end 30 is adapted to be disposed within a renal pelvis of a human, and the second end is adapted to be disposed within a bladder of a human.

Further, the first curled end 30 and/or the second curled end 40 may have a position indication for a user to quickly distinguish between an upper and a lower position. For example, a color mark may be provided on the first curled end 30, or a symbol mark may be provided on each of the first curled end 30 and the second curled end 40.

The microgroove drainage stent tube 1 comprises at least one wedge-shaped head, and the wedge-shaped head is arranged at the end part of the curled end so as to guide the microgroove drainage stent tube 1 to enter a human ureter in the guiding state 200.

In this embodiment of the invention, the microgroove drainage stent tube 1 includes two wedge-shaped heads, a first wedge-shaped head 31 and a second wedge-shaped head 41, which are disposed at the first curled end 30 and the second curled end 40, respectively.

The longitudinal section of the wedge-shaped head is substantially trapezoidal, that is to say, extends obliquely. Further, the wedge head extends outwardly in a gradually converging manner, thereby facilitating entry into smaller sized ureters.

Further, the microgroove 101 extends inwards from the lower end of the wedge-shaped head, that is, the microgroove 101 is not arranged at the position of the wedge-shaped head, and the surface of the microgroove 101 is a flat arc surface, so that when the bracket page 20 is guided to enter, the forked end of the bracket page 20 is prevented from directly contacting the inner membrane of the human organ. When the microgroove drainage stent tube 1 comprises two wedge-shaped heads, the microgroove 101 extends between the two wedge-shaped heads.

In one embodiment of the present invention, the micro-groove drainage stent tube 1 is manufactured by one-piece molding, such as one-step molding, the main body 10, the stent leaves 20, the crimped end, and the wedge head of the micro-groove drainage stent tube 1. Or by multiple forming processes, such as integrally forming the body 10 and then forming the curled end and the holder leaf 20 and the wedge.

Further, the microgroove drainage support tube 1 is provided with a scale mark, the scale mark is used for indicating the length of the microgroove drainage support tube 1, and the length is matched with the model. Different people can use different models.

For example, the usage process of the microgroove drainage stent tube 1 is as follows: in the approach of the tail sound part of the patient operation, firstly a guide wire 2 is penetrated along the ureter, then the microgroove drainage stent tube 1 is introduced along the guide wire 2, and then the guide wire 2 is pulled out, so that the microgroove drainage stent tube 1 is in a curled state 100, namely, the tube placing is finished.

It is worth mentioning that, referring to fig. 5, during the drainage operation of the microgroove drainage stent 1, for example, a renal calculus patient, crushed stone powder or particles exist in the urine of the patient, and in case of a conventional double J-tube with a smooth outer surface, in the case of a stenosis and a peristalsis change which may occur after a ureter operation, the conveying space between the double J-tube and the ureter becomes smaller, and particles are all conveyed in the same communicated channel, so that a blockage easily occurs at a local position. According to the embodiment of the invention, the micro-groove drainage stent tube 1 has the advantages that the stent leaves 20 are arranged on the surface to form a plurality of micro-grooves, so that liquid mixed with particles cannot be in the same channel, and the inner wall of the ureter cannot be directly close to the surface of the ureter due to the supporting effect of the stent leaves 20, namely, theoretically, the micro-grooves formed between the stent leaves 20 exist all the time no matter how the ureter contracts, namely, a stable conveying space exists between the ureter and the micro-groove drainage stent tube 1, on the basis, the micro-groove drainage stent tube works in cooperation with the peristalsis of the ureter, the dynamic conveying space is expanded, and the probability of blockage is reduced.

Due to the peristaltic process of the human ureter, the microgrooves 101 and the inner surface of the ureter form dynamic variable conveying spaces respectively, and the conveying spaces are communicated in a relatively isolated mode, so that the situation that the whole blockage is not easy to occur, namely, the risk that a patient is blocked when the microgrooves 101 are used is reduced.

FIG. 6 is a variant embodiment of the variation of the microgroove volume of a microgroove drainage stent tube 1 according to a first embodiment of the present invention.

In the above-described embodiment of the present invention, the first micro groove 1011, the second micro groove 1012 and the third micro groove 1013 have substantially the same size. In this embodiment of the present invention, the dimensional changes of the first micro groove 1011, the second micro groove 1012 and the third micro groove 1013 are determined according to the position. In other words, the size of the opening of the micro grooves 101 is matched with the arrangement position of the micro grooves 101.

Further, taking the first curled end 30 as an example, the first microgroove 1011 is located at a curled inner curve, and the second microgroove 1012 and the third microgroove 1013 are located at an outer curve. The opening of the first micro groove 1011 is larger than the opening size of the second micro groove 1012 and the third micro groove 1013, and the opening size of the second micro groove 1012 and the third micro groove 1013 is the same.

Fig. 7A-7C are variant embodiments of varying numbers of micro-grooves of a micro-groove drainage stent tube 1 according to a first embodiment of the present invention.

In the above embodiment of the present invention, the micro-groove drainage stent tube 1 is exemplified to include three stent leaves 20 and three micro-grooves 101, in this modified embodiment of the present invention, the stent leaves 20 are respectively 4 and 5, and the corresponding number of the micro-grooves 101 is respectively 4 and 5.

Referring to fig. 7A, the number of the holder leaves 20 and the micro grooves 101 may be 2, and the outer ends of the holder leaves 20 are provided with a guard wall.

Fig. 8 is a schematic perspective view of a microgroove drainage stent tube 1 according to a second embodiment of the present invention.

In this embodiment of the present invention, the microchannel drainage stent 1 includes a reinforced region 50, and the reinforced region 50 is covered and disposed at a local area of the opening of the microchannel 101, that is, the covered region is connected to a local position of the top end of two adjacent stent leaves 20.

It is worth mentioning that, because the overall size of the microgroove 101 stent drainage tube is smaller, the size of the microgroove is smaller, and the stent leaves 20 are flexible sheets, through the arrangement of the reinforced area 50, on one hand, the microgroove drainage stent tube 1 is integrally and conveniently inserted into the ureter, and on the other hand, when drainage is performed, the relative positions of the two stent leaves 20 are relatively fixed, so that the occurrence of blockage can be further reduced.

Further, the plurality of reinforcing regions 50 are respectively provided at different positions of the plurality of micro grooves 101, thereby enhancing the shape-retaining property of the micro groove drainage stent tube 1 as a whole. Preferably, the reinforcement areas 50 corresponding to two adjacent micro grooves 101 are arranged at different heights.

FIG. 9 is a schematic cross-sectional view of a micro-slotted drainage stent tube 1 according to a third embodiment of the present invention.

In this embodiment of the present invention, the microgroove drainage stent tube 1 comprises a protection wall 21, and the protection wall 21 is arranged at the outer end of the stent leaf 20 to prevent the end of the stent leaf 20 from directly contacting the outside, for example, to prevent the thin layer end face of the stent leaf 20 from directly contacting the human ureter intima, causing adverse stimulation reaction and damaging the intima.

Preferably, the retaining wall 21 is arcuately disposed at an outer end of the holder leaf 20. In other embodiments of the invention, the retaining wall may also be of other shapes.

According to this embodiment of the present invention, a plurality of the retaining walls 21 are respectively provided at the outer ends of a plurality of the holder leaves 20, that is, the number of the retaining walls and the number of the holder leaves 20 are matched. A gap 210 is formed between two adjacent retaining walls 21, and the gap 210 communicates the micro groove 101 and the outside.

A plurality of the retaining walls 21 are arranged at intervals to form a substantially annular outer surface, that is, a relatively flat arcuate surface is integrally formed, instead of the stripe-shaped spaced surface directly formed at the end surface of the holder sheet 20. In other words, the stimulation of the holder sheet 20 is moderated by the retaining wall. The retaining walls 21 cover the outside of the carrier sheet 20 in an arc shape, and gaps 210 are formed between adjacent retaining walls 21, so that protective guide walls which tend to be circumferential are formed in the case of liquid passage.

In one embodiment of the present invention, the protective wall 21 extends to protrude from both sides of the support sheet 20, i.e., to form a substantially T-shaped structure, and in another embodiment of the present invention, the protective wall 21 extends to one side of the support sheet 20 in a single direction, i.e., the protective wall and the support sheet 20 form an L-shaped structure, which is not limited in this respect.

FIG. 10 is a schematic view of a micro-slotted drainage stent tube 1 according to a fourth embodiment of the present invention.

In this embodiment of the present invention, the main body 10 has a communicating hole 103, and the communicating hole 103 communicates the guide wire channel 102 of the main body 10 and the micro groove 101. Further, the main body 10 has a plurality of the communication holes 103 respectively provided to a plurality of the micro grooves 101 and different length positions of the main body 10, thereby communicating the guide wire passage 102 and the micro grooves 101 at different positions.

Further, the communication holes 103 are arranged in a predetermined array layout, for example, in a single column or a plurality of columns in the longitudinal direction.

It is worth mentioning that the guide wire channel 102 and the micro groove 101 are communicated through the arrangement of the communication hole 103, so that when the micro groove drainage stent tube 1 is operated, the guide wire channel 102 and the micro groove 101 are in gas and liquid communication, thereby allowing the guide wire channel 102 and the micro groove 101 to mutually promote to keep unblocked. For example, when particles are accumulated in one of the micro-chambers 101, both the liquid and the gas tend to move in a direction with small pressure, so that the liquid or the gas is forced to move into the micro-chamber, and the accumulated particles are separated from the micro-chamber and further transported by peristalsis.

It will be appreciated by persons skilled in the art that the embodiments of the invention described above and shown in the drawings are given by way of example only and are not limiting of the invention. The objects of the invention have been fully and effectively accomplished. The functional and structural principles of the present invention have been shown and described in the examples, and any variations or modifications of the embodiments of the present invention may be made without departing from the principles.

Claims

1. A microgroove drainage stent tube adapted to be installed in a ureter, characterized by having at least two microgrooves and a guide wire channel, the microgrooves being located outside the guide wire channel and extending in correspondence with the guide wire channel, the microgrooves having an extension opening communicating with an external space, wherein the microgroove drainage stent tube comprises a main body forming the guide wire channel and at least two stent leaves, each of which is formed at a spacing outward from the circumference of the main body and adjacent ones of which form one of the microgrooves, the microgroove drainage stent tube being adapted to be disposed in a ureter of a human body and ends of the stent leaves being adapted to contact and be supported on an inner wall of the ureter so as to cause an expansion and peristalsis of the inner wall of the ureter, thereby obtaining an enlarged dynamic transport space as a main passage of the micro-groove drainage stent tube for transporting urine, wherein the micro-groove drainage stent tube has a first curled end and a second curled end, the first curled end and the second curled end are respectively located at both ends of the main body and are adapted to be reversely curled, the micro-groove extends from the first curled end to the second curled end and the micro-groove portion of the first curled end has an inner flow passage cross-sectional area smaller than that of the micro-groove portion of the second curled end, the first curled end is adapted to be disposed at the kidney, the second curled end is adapted to be disposed at the bladder, the micro-groove drainage stent tube further comprises a guard wall disposed at the outer end of the stent leaf to prevent the end of the stent leaf from directly contacting the outside.

2. The micro-groove drainage stent tube of claim 1, having a guiding state in which the micro-groove drainage stent tube is substantially in a straight state for placement in a human ureter and a crimped state; in the curling state, two ends of the microgroove drainage stent are curled.

3. The microchannel drainage stent tube of claim 2, wherein the crimped end is integrally connected to the main body, wherein a microchannel extends from an inner bend of the crimped end to the main body, the guidewire channel extending in communication with the crimped end.

4. The micro-slotted drainage stent tube according to claim 2, wherein the micro-slotted drainage stent tube has a plurality of micro-slots equally distributed around the guidewire channel, the number of micro-slots being selected from 3, 4, 5.

5. The microchannel drainage stent tube of claim 4, wherein one of the microchannels extends from the outer bend of the crimped end to the main body.

6. The microgroove drainage stent tube according to claim 1, comprising a reinforced area covered at a local area of the extended opening of the microgroove.

7. The micro-groove drainage stent tube according to any one of claims 1 to 6, wherein the main body has a communication hole, and the communication hole communicates the guide wire channel of the main body and the micro-groove.

8. A microgroove drainage stent tube according to any of claims 4-6, comprising a wedge head disposed at the end of the first crimped end.

9. The microchannel drainage stent tube of any one of claims 2-6, comprising a reinforced region, the reinforced region being covered over a localized area of the elongated opening of the microchannel.

10. The micro-groove drainage stent tube according to claim 1, wherein the micro-groove drainage stent tube has an overall size of F5-F8mm, the guide wire channel is extended to communicate with each of the curled ends, the main body has a communication hole, the communication hole communicates the guide wire channel and the micro-groove of the main body, wherein the guard walls are arranged at the outer ends of the stent leaves in an arc shape, the number of the guard walls is plural and are respectively arranged at the outer ends of the stent leaves, the plurality of the guard walls are arranged at intervals to form a substantially annular outer surface, a gap is formed between adjacent guard walls, wherein the guard walls are extended to protrude from both sides of the stent leaves in a T-shaped structure, or the guard walls are extended to one side of the stent leaves in an L-shaped structure.