CN215024775U

CN215024775U - Ureteral stent

Info

Publication number: CN215024775U
Application number: CN202120805661.7U
Authority: CN
Inventors: 郭爱军; 李志荣; 王剑金
Original assignee: Zhuhai Yuanmiao Medical Technology Co ltd
Current assignee: Zhuhai Yuanmiao Medical Technology Co ltd
Priority date: 2021-04-19
Filing date: 2021-04-19
Publication date: 2021-12-07
Anticipated expiration: 2031-04-19

Abstract

The utility model discloses in the medical instrument field, for effectively reducing the ureteral stent and losing the condition of water conservancy diversion effect, disclose a ureteral stent, include: an inner layer structure; the outer layer structure is sleeved on the inner layer structure; the inner layer structure is provided with a flow guide gap for guiding urine; by applying the ureteral stent, the condition that the ureteral stent loses the flow guiding effect can be effectively reduced.

Description

Ureteral stent

Technical Field

The utility model relates to the field of medical equipment, in particular to ureteral stent.

Background

When a human body encounters a problem of obstruction of a ureter, hydronephrosis, and the like due to a disease such as tumor, retroperitoneal fibrosis, ureteral stenosis, and the like, it is generally necessary to perform an invasive operation for supporting the ureter by inserting a ureteral stent into the ureter to prevent the ureteral stenosis and adhesion blockage, and to guide urine from the renal pelvis to the bladder.

The ureteral stent commonly used in hospitals, commonly known as a "pigtail tube", is generally made of polyurethane, has high radial strength and is not easy to deform, and the side wall of the "pigtail tube" is provided with a plurality of through holes so that the diversion performance of the "pigtail tube" is better.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a ureteral stent can effectively reduce the ureteral stent and lose the condition of water conservancy diversion effect.

The utility model discloses a ureteral stent, include: an inner layer structure; the outer layer structure is sleeved on the inner layer structure; the inner layer structure is provided with a flow guide gap for guiding urine.

According to some embodiments of the invention, the inner layer structure is a rope-like structure woven from second threads, forming a flow guiding gap between the woven second threads.

According to some embodiments of the invention, the second wire is made of a memory alloy material.

According to some embodiments of the invention, the inner structure is formed by four second threads interlaced with each other.

According to some embodiments of the present invention, the inner layer structure is formed by four filament groups interlaced with each other, each filament group being formed by two second filaments wound together.

According to some embodiments of the invention, the inner layer structure is formed by four second threads wound clockwise.

According to some embodiments of the invention, the inner layer structure is formed by clockwise winding of four filament groups, each filament group being formed by winding of two second filaments.

According to some embodiments of the invention, the inner layer is formed by eight second threads wound in a first direction, two adjacent second threads wound in a second direction, the first direction and the second direction being opposite.

According to some embodiments of the invention, the outer structure is knitted from a first thread.

According to some embodiments of the invention, the inner wall of the outer structure abuts the outer wall of the inner structure.

When the ureteral stent of the utility model is used, the tubular outer layer can be compressed and then put into the urethra through the implantation device, a urethral catheterization channel is formed in the urethra, and when the outer layer structure is compressed to the maximum degree and is tightly attached to the inner layer, urine can still be led out along the diversion gap formed on the inner layer structure; effectively reducing the occurrence of the condition that the ureteral stent loses the flow guiding function.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is an assembly isometric view of an inner structure and an outer structure of a ureteral stent assembly in an embodiment of the present invention;

fig. 2 is an assembled top view of the inner and outer structures of the ureteral stent assembly according to an embodiment of the present invention;

fig. 3 is an isometric view of an outer structure in an embodiment of the invention;

FIG. 4 is an enlarged view taken at A in FIG. 3;

fig. 5 is an isometric view of another skin structure in an embodiment of the invention;

FIG. 6 is an enlarged view at B in FIG. 5;

fig. 7 is a schematic view of a first inner layer structure according to an embodiment of the present invention;

fig. 8 is a schematic view of a second inner layer structure according to an embodiment of the present invention;

FIG. 9 is an enlarged view at C of FIG. 8;

fig. 10 is a schematic view of a third inner layer structure according to an embodiment of the present invention;

fig. 11 is a schematic view of a fourth inner layer structure according to an embodiment of the present invention;

the above figures contain the following reference numerals.

Reference numerals	Name (R)
		100	Outer layer structure
110	First silk thread
		200	Inner layer structure
210	Second thread

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does 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.

In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the present number, and the terms greater than, less than, within, etc. are understood as including the present number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

Referring to fig. 1 and 2, the ureteral stent of the first aspect of the present embodiment includes: an inner layer structure 200; an outer layer structure 100 sleeved on the inner layer structure 200; the outer layer structure 100 is a tubular structure, and the outer layer structure 100 is braided by first filaments 110.

With the ureteral stent of the first aspect of the embodiment, when in use, the tubular outer layer can be radially compressed and then placed into the urethra through the implantation device to form a support in the urethra, and due to the support of the inner layer structure 200 inside the outer layer structure 100, when the outer layer structure 100 is deformed, the outer layer structure 100 is not deformed to be completely folded under the support of the inner layer structure 200, and meanwhile, urine can flow between the gaps formed by the first wires 110 of the outer layer, so that the outer layer structure 100 can still play a role in catheterization; effectively reducing the occurrence of the condition that the ureteral stent loses the flow guiding function.

On the other hand, when the outer layer structure 100 is a structure formed by tightly weaving the first filaments 110, a flow guiding gap can be formed between the first filaments 110 for guiding flow, and the tightly woven structure can prevent hyperplastic tissue from growing into the duct to block the ureter.

In order to enhance the deformability of the ureteral stent and enable the outer structure 100 to still support the urethra after being compressed, the first wires 110 may be made of elastic wires; the elastic shape wire can be made of shape memory alloy material with super elasticity, such as nickel-titanium alloy, etc., according to the requirement; or made of high-elasticity polymer materials.

As shown in fig. 3 and 4, the outer layer structure 100 may be knitted by a knitting method, that is, the first threads 110 are bent into loops and are interlooped with each other to form the outer layer structure 100.

As shown in fig. 5 and 6, the outer layer structure 100 may also be woven by a weaving method, that is, the first threads 110 are interlaced in a first direction and a second direction to form the outer layer structure 100, and the first direction and the second direction are perpendicular to each other.

As shown in fig. 7 to 11, the inner layer structure 200 is woven by at least one second thread 210, and a flow guiding gap for guiding flow is formed between the woven second threads 210; wherein urine can gradually flow into the bladder from the renal pelvis through the flow guide gaps between the second filaments 210; so that the outer layer structure 100 can also have a good urethral catheterization effect when compressed.

In this embodiment, both ends of the ureteral stent are bent, and the bending directions of both ends of the ureteral stent are opposite; the shape of the ureteral stent can refer to the shape of a pigtail tube for catheterization which is common in the prior art, and the ureteral stent is effectively prevented from migrating in the ureter.

The first aspect of the present embodiment also relates to a manufacturing method of a ureteral stent, which is used for manufacturing the ureteral stent, and includes the following steps: the outer layer structure 100 is woven with the first threads 110, and then the outer layer structure 100 is fitted over the inner layer structure 200.

Wherein, the outer layer structure 100 can adopt a knitting method, the first silk threads 110 are bent into loops and mutually sleeved to form the outer layer structure 100; the outer layer structure 100 may also be formed by interlacing the first filaments 110 in a first direction and a second direction by a weaving method, wherein the first direction and the second direction are perpendicular; in the weaving process, the first threads 110 woven in the first direction are warp threads and the second threads 210 woven in the second direction are weft threads.

In a second aspect of this embodiment, a ureteral stent is also provided, comprising: an inner layer structure 200; an outer layer structure 100 sleeved on the inner layer structure 200; the inner layer structure 200 is provided with a flow guiding gap for guiding urine.

When the ureteral stent of the second aspect of the embodiment is applied, the tubular outer layer can be compressed and then placed into the urethra through the implantation device to form a urethral catheterization channel in the urethra, and when the outer layer structure 100 is compressed to the maximum degree and is tightly attached to the inner layer, urine can still be led out along the diversion gap formed in the inner layer structure 200; effectively reducing the occurrence of the condition that the ureteral stent loses the flow guiding function.

As shown in fig. 7 to 11, the inner layer structure 200 is a rope-shaped structure formed by weaving second threads 210, and a flow guiding gap is formed between the woven second threads 210; because the inner layer structure 200 is a rope-shaped structure and is radially incompressible, the outer layer structure 100 can play an effective role in guiding flow when compressed; meanwhile, after weaving, a flow guide gap can be formed between the second silk threads 210 for urine flow guide, so that the ureteral stent still can play a good flow guide role after being compressed;

similar to the first thread 110, the second thread 210 may also be made of an elastic thread; the elastic shape wire can be made of shape memory alloy material with super elasticity, such as nickel-titanium alloy, etc., according to the requirement; a high-elasticity polymer material may also be used.

As shown in fig. 8-11, the second filaments 210 can be woven into the inner layer structure 200 in a variety of ways, as follows.

As shown in fig. 7, the inner layer structure 200 is formed by four second threads 210 interlaced with each other.

As shown in fig. 8 and 9, the inner layer structure 200 is formed by four thread groups interlaced with each other, and each thread group is formed by two second threads 210.

Of course, the inner layer structure 200 may also be formed by four second filaments 210 wound clockwise.

As shown in fig. 10, the inner layer 200 is formed by four filament groups wound clockwise, each filament group being formed by two second filaments 210 wound.

As shown in fig. 11, the inner layer structure 200 is formed by eight second threads 210 wound in a first direction, and two adjacent second threads 210 wound in a second direction, the first direction and the second direction being opposite.

In order to enhance the supporting effect of the ureteral stent, the inner wall of the outer layer structure 100 abuts against the outer wall of the inner layer structure 200; at this moment, the inner layer structure 200 can play a better supporting role for the outer layer structure 100, when the inner layer and the outer layer are all knitted by silk threads, urine can pass through a part of the Liutong tree between the gaps between the outer wall of the outer layer structure 100 and the inner wall of the inner layer structure 200, and urine can also pass through the gaps between the interwoven silk threads of the inner layer and the outer layer.

It should be noted that the ureteral stents of the present embodiment can be used in combination to form a ureteral stent with excellent performance.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.

Claims

1. A ureteral stent, comprising:

an inner layer structure (200);

the outer layer structure (100) is sleeved on the inner layer structure (200);

a flow guide gap is formed in the inner layer structure (200) and used for guiding urine.

2. The ureteral stent according to claim 1, wherein the inner layer structure (200) is a rope-like structure woven with second filaments (210), the woven second filaments (210) forming the flow guiding gaps therebetween.

3. The ureteral stent according to claim 2, wherein the second wire (210) is made of a memory alloy material.

4. The ureteral stent according to claim 2, wherein the inner layer structure (200) is formed by four strands of the second wires (210) interdigitating.

5. The ureteral stent according to claim 2, wherein said inner layer structure (200) is formed by the interdigitation of four groups of wires, each of said groups being formed by the winding of two of said second wires (210).

6. The ureteral stent according to claim 2, wherein the inner layer structure (200) is formed by four strands of the second wire (210) wound clockwise.

7. The ureteral stent according to claim 2, wherein said inner layer structure (200) is formed by the clockwise winding of four groups of wires, each of said groups of wires being formed by the winding of two of said second wires (210).

8. The ureteral stent according to claim 2, wherein the inner layer structure (200) is formed by eight second wires (210) wound in a first direction, two adjacent second wires (210) being wound in a second direction, the first and second directions being opposite.

9. The ureteral stent according to claim 1, wherein the outer layer structure (100) is braided from first filaments (110).

10. The ureteral stent according to claim 1 or 9, wherein the inner wall of the outer layer structure (100) abuts the outer wall of the inner layer structure (200).