CN210277940U

CN210277940U - Tissue drainage stent

Info

Publication number: CN210277940U
Application number: CN201920766219.0U
Authority: CN
Inventors: 孙亿民; 李玉茜; 冷德嵘; 潘长网; 李常青; 李宁; 奚杰峰; 韦建宇
Original assignee: Micro Tech Nanjing Co Ltd
Current assignee: Micro Tech Nanjing Co Ltd
Priority date: 2019-05-24
Filing date: 2019-05-24
Publication date: 2020-04-10
Anticipated expiration: 2029-05-24
Also published as: WO2020238167A1; ES1285656U; DE212019000425U1; ES1285656Y

Abstract

The utility model belongs to the technical field of the medical instrument technique of wicresoft and specifically relates to a tissue drainage support is related to. The tissue drainage bracket comprises a drainage tube and a first flange arranged at one end of the drainage tube, the first flange protrudes out of the outer wall of the drainage tube, and the drainage tube is hollow to form a drainage cavity; one end of the drainage tube, which corresponds to the target tissue, is provided with a first flange which can be unfolded outwards, the first flange comprises a plurality of first support wings which are unfolded outwards, and the first support wings can support the wall surface of the target tissue to prevent the wall surface of the target tissue from being attached to block the communication part of the drainage tube and the target tissue in the drainage process, so that the smoothness of drainage between tissues is ensured, and the treatment effect is improved; simultaneously, a plurality of first support wings support the tissue wall jointly and can make the wall atress even, reduce the stimulation to the tissue.

Description

Tissue drainage stent

Technical Field

The utility model belongs to the technical field of the medical instrument technique of wicresoft and specifically relates to a tissue drainage support is related to.

Background

With the development of endoscopes and ultrasonic endoscopes, the technology of placing a metal stent under an endoscope for drainage by intertissue anastomosis has been developed correspondingly, such as pancreatic cyst drainage, gastrointestinal anastomosis, cholecystectomy, and the like. At present, anastomotic drainage stents are available in the market, when the stent is used for drainage of pancreatic pseudocyst, for example, if a sac body becomes small, the cyst wall surfaces are close to each other, and the close cyst wall surfaces cover the end part of the stent, so that subsequent drainage is not smooth, and further drainage is blocked; and the tip of the end surface of the bracket can even stimulate the attached cyst wall surface, and the attached cyst wall surface can generate continuous inflammation and hemorrhage due to excessive stimulation.

Therefore, it is highly desirable to provide an anastomotic drainage stent with sufficient drainage effect and less irritation to tissues.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a tissue drainage support to solve the not smooth and great technical problem of tissue wall surface stimulation of tissue drainage support drainage that exists among the prior art to a certain extent.

The application provides a tissue drainage bracket, which comprises a drainage tube and a first flange arranged at one end of the drainage tube;

the first flange comprises a plurality of first support wings; one end of the first supporting wing is connected with the drainage tube, and the other end of the first supporting wing extends in the direction far away from the central line of the drainage tube; and a plurality of the first supporting wings are arranged along the circumferential direction of the drainage tube.

Further, the first support wing has a flat sheet shape or a curled sheet shape.

Furthermore, the number of the first supporting wings is three, the three first supporting wings are arranged along the circumferential direction of the drainage tube at equal intervals, and the three first supporting wings are distributed in a rotationally symmetrical mode relative to the central line of the drainage tube.

Furthermore, the corner of one end of the first supporting wing, which is far away from the drainage tube, is in arc transition.

Further, a second flange is arranged at one end of the drainage tube, which is far away from the first flange;

the second flange is of a continuous flanging and curling type structure or an expanded spherical structure along the circumferential direction of the drainage tube; or the like, or, alternatively,

the second flange comprises a plurality of second support wings; one end of the second support wing is connected with the drainage tube, and the other end of the second support wing extends in the direction far away from the central line of the drainage tube; and a plurality of the second support wings are arranged along the circumferential direction of the draft tube.

Further, the second support wing is in a flat sheet shape, a curled sheet shape or a convex ball shape.

Further, the first flange and the second flange extend along a radial direction of the draft tube by 0.3 to 2 times an outer diameter of the draft tube.

Further, at least part of the first supporting wings and at least part of the second supporting wings are provided with X-ray developing parts.

Further, a recovery wire is arranged on the second flange.

Further, the drainage tube, the first flange and the second flange are all of filamentous braided structures and are all coated with biological leakage-proof membranes.

Compared with the prior art, the beneficial effects of the utility model are that:

the tissue drainage support is used for being placed in a body under an endoscope to perform anastomosis drainage between tissues, wherein a drainage cavity is formed in the hollow part of the drainage tube, one end of the drainage tube is communicated with a target tissue, and the other end of the drainage tube is communicated with an anastomosis tissue so as to perform drainage between the target tissue and the anastomosis tissue. The cyst cavity of a target tissue (such as pancreatic pseudocyst) is reduced in the drainage process, so that the cyst wall surface can be attached to block the communication position of the drainage tube and the target tissue, and the drainage among tissues is not smooth; simultaneously, a plurality of first support wings support the tissue wall jointly and can make the wall atress even, reduce the stimulation to the tissue.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural view of a tissue drainage stent according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a first flange of a tissue drainage stent according to an embodiment of the present invention;

fig. 3 is another schematic structural view of a first flange of a tissue drainage stent according to an embodiment of the present invention;

fig. 4 is another schematic structural view of a first flange of a tissue drainage stent according to an embodiment of the present invention;

fig. 5 is another schematic structural view of a first flange of a tissue drainage stent according to an embodiment of the present invention;

fig. 6 is another schematic structural view of a first flange and a second flange of a tissue drainage stent according to an embodiment of the present invention;

fig. 7 is another schematic structural view of a first flange and a second flange of a tissue drainage stent according to an embodiment of the present invention;

FIG. 8 is a schematic top view of the tissue drainage stent of FIG. 6;

FIG. 9 is a schematic top view of the tissue drainage stent of FIG. 7;

fig. 10 is a schematic top view of another configuration of a tissue drainage stent according to an embodiment of the present invention;

fig. 11 is a schematic top view of another configuration of a tissue drainage stent according to an embodiment of the present invention;

fig. 12 is a schematic side view of another configuration of a tissue drainage stent according to an embodiment of the present invention;

fig. 13 is another schematic structural view of a tissue drainage stent according to an embodiment of the present invention.

Reference numerals:

1-drainage tube, 2-first flange, 201-first support wing, 3-second flange, 301-second support wing, 4-recovery line.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention.

The components of the embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.

Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed 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, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Tissue drainage stents according to some embodiments of the present invention are described below with reference to fig. 1-13.

Referring to fig. 1 to 11, the present application provides a tissue drainage stent, which includes a drainage tube 1 and a first flange 2 disposed at one end of the drainage tube 1, wherein the first flange 2 protrudes out of an outer wall of the drainage tube 1. The first flange 2 comprises a plurality of first supporting wings 201; one end of the first support wing 201 is connected with the drainage tube 1, and the other end extends outwards in the direction far away from the central line of the drainage tube 1; and the plurality of first supporting wings 201 are arranged along the circumferential direction of the drainage tube 1, i.e. the plurality of first supporting wings 201 can be unfolded outwards to be in an open structure and form a supporting surface to support the target tissue.

Specifically, the tissue drainage stent of the embodiment of the application is used for being placed in a body under an endoscope for anastomosis drainage between tissues, wherein the drainage tube 1 is internally hollow to form a drainage cavity, one end of the drainage cavity is communicated with a target tissue, and the other end of the drainage cavity is communicated with an anastomosis tissue, so that drainage is performed between the target tissue and the anastomosis tissue. Because the cyst cavity of a target tissue (such as a pancreatic pseudocyst) is reduced in the drainage process, the cyst wall surface can be attached to block the communication part of the drainage tube 1 and the target tissue, so that the drainage is not smooth, for this reason, a first flange 2 capable of being unfolded outwards is arranged at one end of the drainage tube 1 corresponding to the target tissue, the first flange 2 comprises a plurality of first supporting wings 201 which are unfolded outwards, the first supporting wings 201 can support the wall surface of the target tissue, the condition that the communication part of the drainage tube 1 and the target tissue is blocked due to the attachment of the target tissue wall surface in the drainage process is prevented, the smoothness of the drainage between tissues is ensured, and the treatment effect is improved; meanwhile, the plurality of first supporting wings 201 support the tissue wall surface together, so that the wall surface is stressed uniformly, and the stimulation to the tissue is reduced.

In addition, in order to improve the stability of the first flange 2 for supporting the target tissue, referring to fig. 2 to 5, a plurality of first supporting wings 201 provided in the embodiment of the present application may be unfolded in an umbrella shape, unfolded in a petal shape, or unfolded in a wind wheel shape, so as to support the wall surface of the target tissue around the periphery of the drainage tube 1, thereby ensuring the normal drainage. Preferably, as shown in fig. 2 and 3, when the plurality of first supporting wings 201 can be unfolded in an umbrella shape, the clinically required supporting force of the first flange 2 can be adjusted by adjusting the number of the braided heads or the size of the outer diameter of the outermost edge of the umbrella end of the first supporting wings 201, so as to ensure the normal operation of drainage.

In order to prevent the deployed first support wings 201 from stimulating the target component, the first support wings 201 of the embodiment of the present application have no sharp corner, can have good adhesion to the wall surface of the target tissue, and do not stimulate the tissue wall surface to cause inflammation or bleeding. In addition, the first support wing 201 has a certain flexibility to reduce irritation to the tissue wall surface.

Therefore, the tissue drainage support of the application can play the effect of lasting drainage in the drainage treatment process between tissues, and is less to tissue stimulation.

In one embodiment of the present application, preferably, as shown in fig. 2 to 11, the first support wing 201 has a flat sheet shape or a curled sheet shape.

Wherein when the first support wing 201 is in the shape of a flat sheet, it extends along the radial direction of the drainage tube 1, and may be in the shape of an umbrella (as shown in fig. 2 and 3), a petal (as shown in fig. 4), or a wind wheel (as shown in fig. 5), etc. When the first support wing 201 has a curled shape, the curling direction thereof may be in a radial direction of the draft tube 1 (as shown in fig. 6 and 7) or in an outer circumferential direction of the draft tube 1 (not shown). Preferably, when the first supporting wing 201 is curled along the radial direction or the outer circumferential direction of the drainage tube 1, the opening direction thereof is toward the target tissue, so that the first supporting wing 201 can form a tissue fluid communication inlet with the target tissue to promote drainage of tissue fluid; meanwhile, when drainage tissues (such as pancreatic cysts) shrink, a fully-closed cavity cannot be formed by the special open structure at the inlet end, and the function of guiding liquid to flow into the drainage tube is achieved.

In addition, when the first flange 2 is of an umbrella type, a petal type or a wind wheel type, the first supporting wing 201 is preferably of a flat sheet type, and a plurality of flat sheet-shaped first supporting wings 201 may be arranged at intervals or stacked to present a complete supporting surface. When the first support wing 201 has a curled shape, the number of the first support wing 201 may be relatively small, and preferably two or four.

In an embodiment of the present application, preferably, referring to fig. 4, the number of the first support wings 201 is three, the three first support wings 201 are arranged at equal intervals along the circumferential direction of the draft tube 1, and the three first support wings 201 are distributed in a rotational symmetry manner relative to the center line of the draft tube 1, presenting an air outlet wheel-like structure. The three first supporting wings 201 are arranged at equal intervals, so that the wall surface of the target tissue can be effectively supported, and the optimal supporting effect is achieved when the number of the supporting wings is minimum.

In one embodiment of the present application, preferably, as shown in FIG. 7, the corner of the end of the first support wing 201 away from the drainage tube 1 is in arc transition.

In this embodiment, for further improving the laminating nature of first support wing 201 and target tissue wall, avoid first support wing 201 to cause amazing to the target tissue wall, the corner that this embodiment set up the one end that first support wing 201 kept away from drainage tube 1 is the arc transition, the border that first support wing 201 expandes promptly is the arc transition, no closed angle or edge, thereby can avoid causing amazing to the target tissue wall, overcome the defects such as the amazing inflammation, hemorrhage, hyperplasia that causes greatly easily to the tissue that present metal drainage support exists between the tissue to a certain extent.

In one embodiment of the present application, preferably, as shown in fig. 1, 6, 7, 12 and 13, the draft tube 1 is provided with a second flange 3 at an end thereof remote from the first flange 2;

the second flange 3 is in a continuous flanging and curling structure or a bulging and globular structure along the circumferential direction of the drainage tube 1 (as shown in figure 12); or the like, or, alternatively,

the second flange 3 includes a plurality of second support wings 301; one end of the second support wing 301 is connected with the drainage tube 1, and the other end extends outwards in the direction far away from the central line of the drainage tube 1; and a plurality of second support wings 301 are provided along the circumferential direction of the draft tube 1.

In the embodiment, one end of the drainage tube 1, which is far away from the first flange 2, i.e. one end close to the anastomotic tissue, is provided with the second flange 3 protruding outwards, and the second flange 3 is supported and fixed with the anastomotic tissue, so that on one hand, the second flange 3 can support the wall surface of the anastomotic tissue, prevent the anastomotic tissue from blocking a drainage cavity, and further ensure the smooth outflow of drainage materials; on the other hand, the anastomotic tissue can fix the whole drainage bracket through the second flange 3, so that the drainage bracket is prevented from falling into the abdominal cavity.

As for the specific structure of the second flange 3, it can be a continuous flanging and curling structure or a bulging and globular structure along the circumferential direction of the drainage tube 1, and also can be in the form of a supporting wing like the first flange 2, as long as it can play the role of supporting and draining the anastomotic tissue and fixing the whole stent.

It should be noted that, as shown in fig. 12, when the second flange 3 is a continuous expanded spherical structure along the circumferential direction of the drainage tube 1, it is a mushroom-like umbrella structure, and its expanded wall is smooth and protrudes from one end of the drainage tube 1, and at the same time, its expanded wall is provided with an opening corresponding to the open end of the drainage tube 1 to form an inlet end.

In one embodiment of the present application, preferably, as shown in fig. 1, 6, 7 and 13, the second support wing 301 has a flat sheet shape, a curled sheet shape or a convex ball shape.

In this embodiment, when the second flange 3 is in the form of an outwardly extending support wing, the specific structure of the second support wing 301 may be a flat sheet (as shown in fig. 1) or a curled sheet (as shown in fig. 6 and 7), or may be an outwardly bulging convex ball (as shown in fig. 13). When the second support wing 301 is in a flat sheet shape or a curled sheet shape, the structure and arrangement principle thereof are the same as those of the first support wing 201, and thus the description thereof is omitted. In addition, the second supporting wing 301 can also adopt a convex ball shape which bulges outwards, and because the anastomotic tissue end does not need an overlarge supporting area, the second flange 3 can support the wall surface of the anastomotic tissue to avoid blocking a drainage cavity, and the bracket can be fixed; the surface smoothness of the convex supporting wings is better, and the stimulation to the tissue is not easy to generate.

In one embodiment of the present application, preferably, referring to fig. 12 and 13, in order to ensure that the first flange 2 and the second flange 3 have a certain supporting area to support the corresponding tissue and prevent the tissue from blocking the drainage lumen to obstruct the drainage, the embodiment of the present application provides that the first flange 2 and the second flange 3 extend along the radial direction of the drainage tube 1 for 0.3-2 times of the outer diameter of the drainage tube 1, i.e. the outer diameter D1 of the first flange 2 and the outer diameter D2 of the second flange 3 are respectively more than 1.3 times of the outer diameter D of the drainage tube 1, and preferably the outer diameters of the first flange 2 and the second flange 3 are respectively more than 3 times of the outer diameter D of the drainage tube 1, thereby ensuring that the overall size of the drainage stent is within a reasonable range and ensuring more sufficient drainage of the tissue fluid.

In one embodiment of the present application, preferably, in order to know the supporting and positioning conditions of the drainage stent in the body during the X-ray imaging detection, the embodiment of the present application is provided with an X-ray developing member on at least part of the first supporting wing 201 and at least part of the second supporting wing 301. Further preferably, an X-ray developing device may be disposed on each of the first support wings 201 of the first flange 2 and each of the second support wings 301 of the second flange 3. The material of the X-ray development may be tantalum.

In one embodiment of the present application, which is preferably shown with reference to fig. 1, 12 and 13 to facilitate removal of the drainage stent at the end of drainage, the embodiment of the present application provides a retrieval line 4 on the second flange 3, and the drainage stent is removed by pulling back the retrieval line 4. Preferably, the recovery wire 4 is provided at the rim of the second flange 3.

In addition, the material of the recovery wire 4 can be selected from high molecular polymer or metal wire material which has good biocompatibility and is not easy to be corroded by body fluid.

In one embodiment of the present application, the drainage tube 1, the first flange 2 and the second flange 3 are preferably all of a filamentous braided structure, in particular, braided from memory alloy wires. And the drainage tube 1, the first flange 2 and the second flange 3 are all coated with biological leakage-proof films to prevent drainage materials from leaking from meshes of the stent, and can effectively inhibit tissue walls from proliferating and growing into the meshes of the stent contacted with the drainage materials to prevent granulation from growing in vivo.

Preferably, the material of the biological leakage-proof membrane can be high molecular materials with good biological properties such as PTFE, PET, silica gel and the like, so that biotoxicity is not caused, and the later recovery of the stent can be facilitated.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. A tissue drainage bracket is characterized by comprising a drainage tube and a first flange arranged at one end of the drainage tube;

2. The tissue drainage stent of claim 1, wherein the first support wing is in the form of a flat sheet or a crimped sheet.

3. The tissue drainage stent according to claim 1, wherein the number of the first support wings is three, three first support wings are arranged at equal intervals in the circumferential direction of the drainage tube, and the three first support wings are distributed in a rotationally symmetric manner with respect to the center line of the drainage tube.

4. The tissue drainage stent of claim 1, wherein corners of an end of the first support wing distal from the drainage tube are in an arc transition.

5. The tissue drainage stent according to any one of claims 1 to 4, wherein a second flange is provided on an end of the drainage tube remote from the first flange;

6. The tissue drainage stent of claim 5, wherein the second buttress wing is in the form of a flat sheet, a crimped sheet, or a convex sphere.

7. The tissue drainage stent of claim 5, wherein the first flange and the second flange extend along a radial direction of the drainage tube by a length of 0.3-2 times an outer diameter of the drainage tube.

8. The tissue drainage stent of claim 5, wherein at least a portion of the first support wing and at least a portion of the second support wing each have an X-ray imaging member disposed thereon.

9. The tissue drainage stent of claim 5, wherein a retrieval line is disposed on the second flange.

10. The tissue drainage stent of claim 5, wherein the drainage tube, the first flange, and the second flange are all filamentous braided structures, and are all coated with a bio-leakproof film.