CN221712360U - Ureteral stent - Google Patents

Abstract

The utility model discloses a ureteral stent, which comprises a flexible component and a stent body which are sequentially connected from a proximal end to a distal end; the bracket body is internally arranged in the ureter and the renal pelvis, the bracket body is hollow tubular, a plurality of drainage holes are formed in the side wall of the bracket body, and a liquid outlet is formed in the proximal end of the bracket body; the flexible member is connected with the proximal end of the support body and located at the periphery of the liquid outlet, and floats in the bladder. According to the utility model, the pigtail ring structure originally built in the bladder is replaced by the flexible member, and the flexible member is connected with the bracket body, so that the flexible member floats in the bladder and does not touch the inner wall of the bladder, thereby effectively reducing bladder stimulation and mucous membrane injury, and effectively avoiding the occurrence rate of complications such as bladder stimulation and mucous membrane stimulation.

Description

Ureteral stent

Technical Field

The utility model relates to the technical field of medical stents, in particular to a ureteral stent. The utility model requires priority, and the application number of the prior application is: 2023220145578, name: ureteral stent, priority date: 2023, 07, 28.

Background

The ureteral stent has very wide application in urological surgery, is suitable for the treatment processes of the above-mentioned urological surgery such as kidney stones, ureteral stones, kidney water, kidney transplantation, kidney and ureteral benign tumors, etc., lithotripter lithotripsy, ureteral stenosis, etc., can play the effect of drainage urine after it implants the ureter, prevent ureteral stenosis and adhesion jam, etc., and during the use, ureteral stent one end is placed in the renal pelvis, and the stent body is placed in the ureter, and the other end is placed in the bladder.

Currently, the ureteral stents currently on the market are generally made of medical polymer materials, such as silicone rubber or polyurethane, and the ends of the tubes are bent inwards in opposite directions to form a circle, such as a pigtail, so that the ureteral stents are also called as pigtail tubes or double J-shaped tubes; in view of the necessity to place or remove ureteral stents by invasive procedures, which, although not a major operation, are painful to the patient, and more seriously, cause damage to the urinary tract tissue to varying degrees during placement or removal, after the ureteral stent is placed, the ureteral stent is conventionally left in the patient for a certain period of time, often with some complications.

However, conventional ureteral stents have the following clinical applications or technical drawbacks to be improved:

The structure of the pigtail ring reserved at the bladder end has harder structure and is contacted with the inner wall of the bladder, and long-term reserved pigtail ring is easy to cause complications such as bladder stimulation, mucous membrane stimulation and the like.

Disclosure of utility model

Therefore, the technical problem to be solved by the utility model is to overcome the defect that the pigtail loop structure of the traditional ureteral stent which is reserved in the bladder is easy to cause complications such as bladder stimulation and mucous membrane stimulation, so as to provide the ureteral stent.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

A ureteral stent, comprising a flexible component and a stent body which are sequentially connected from a proximal end to a distal end;

the bracket body is internally arranged in the ureter and the renal pelvis, the bracket body is hollow tubular, a plurality of drainage holes are formed in the side wall of the bracket body, and a liquid outlet is formed in the proximal end of the bracket body;

The flexible member is connected with the proximal end of the support body and located at the periphery of the liquid outlet, and floats in the bladder.

According to a further optimized technical scheme, the flexible member is connected with a take-out wire.

Further optimizing the technical scheme, the flexible component is the coil.

Further optimizing the technical scheme, the coil includes at least one flexible wire rod, flexible wire rod has two tip, and two tip are connected to the proximal end of support body respectively.

According to a further optimized technical scheme, the bracket body comprises a catheter and a pigtail ring which are sequentially connected from a proximal end to a distal end;

The pigtail ring is arranged in the renal pelvis and is suitable for draining urine in the renal pelvis;

the catheter is arranged in the ureter and is suitable for draining and conveying urine;

The drainage holes are formed in the pigtail ring and/or the side wall of the catheter.

According to the further optimized technical scheme, the flexible member is a thermoplastic polymer material flexible member, the guide pipe is a thermoplastic polymer material guide pipe, and the pigtail ring is a thermoplastic polymer material pigtail ring.

Further optimizing the technical scheme, the proximal end of the catheter is provided with a flaring structure.

According to a further optimized technical scheme, the flaring structure comprises a straight section, a reducing section and a plugboard which are integrally connected; the straight section is integrally connected with the guide pipe, and the liquid outlet is formed in the straight section; the plug boards are provided with two connecting grooves which are symmetrical to each other and used for positioning the flexible component.

Further optimizing the technical scheme, bending the pigtail coil into a spiral coil; the pigtail ring comprises a circle part and a straight part, one end of the circle part is communicated with the catheter, and the other end of the circle part is communicated with the straight part.

According to the further optimized technical scheme, the outer wall surface of the bracket body is coated with a hydrophilic lubricating coating.

The technical scheme of the utility model has the following advantages:

1. According to the ureteral stent provided by the utility model, the pig tail ring structure originally built in the bladder is replaced by the flexible member, and the flexible member is connected with the stent body, so that the flexible member floats in the bladder and does not touch the inner wall of the bladder, thereby effectively reducing bladder stimulation and mucous membrane injury, and effectively avoiding the occurrence rate of complications such as bladder stimulation and mucous membrane stimulation.

2. According to the ureteral stent provided by the utility model, the extraction silk thread is connected to the flexible component, so that the extraction silk thread is not required to be connected to the drainage hole, the extraction silk thread does not occupy the effective inner cavity of the drainage cavity of the catheter any more, the effective drainage area of the inner cavity of the catheter is increased, and the drainage effect is improved.

3. According to the ureteral stent provided by the utility model, the traditional pigtail ring structure is replaced by the coil at the bladder end, and the silk thread is soft in texture, so that the irritation and damage of the bladder of a patient can be effectively reduced, and the comfort and safety of the patient are improved. The number and shape of the coils can be adjusted according to the shape of the bladder of the patient so as to adapt to the needs of patients with different ages and sexes. In addition, the utility model replaces the pigtail ring structure originally arranged in the bladder with the coil, and compared with the pigtail ring structure, the coil has fewer materials, thereby reducing catheter materials at the ureter.

4. The ureteral stent provided by the utility model comprises a coil, a catheter and a pigtail coil which are respectively made of thermoplastic polymer materials. The catheter and the coil are made of thermoplastic polymer materials, have good biocompatibility and mechanical properties, can adapt to the ureter lengths and bending degrees of different patients, and improve the adaptability and stability of the catheter.

5. According to the ureteral stent provided by the utility model, the hydrophilic lubricating coating is coated on the outer wall surface of the stent body, so that the formation of ureteral crystallization complications can be reduced, the operations of intubation and tube drawing are convenient, and the damage to urinary tract tissues is reduced.

6. The ureteral stent provided by the utility model has the advantages that the comfort and safety of a patient are improved, the drainage effect is improved, and the occurrence rate of complications is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic diagram of a coil of the present utility model;

FIG. 3 is a schematic view of another construction of the coil of the present utility model;

FIG. 4 is a schematic view of the structure of the pigtail coil of the present utility model;

FIG. 5 is a schematic view of the flaring structure of the present utility model;

Fig. 6 is a schematic structural view of a groove at the joint of the catheter and the flexible wire.

Reference numerals:

1. Flexible member, 2, catheter, 22, flaring structure, 221, straight section, 222, reducing section, 223, plugboard, 224, connecting groove, 3, pigtail, 31, circle, 32, straight section, 4, drainage hole, 5, take out silk thread.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it is noted that, unless explicitly stated and defined otherwise, the term "distal" is generally the end of the medical implant remote from the operator; "proximal" as opposed to "distal" refers to the end of the medical implant that is proximal to the operator.

In the description of the present utility model, it should be noted that the azimuth or positional relationship indicated by the terms "inner", "outer", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element in question must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present utility model.

In addition, the technical features of the different embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.

One embodiment of a ureteral stent as shown in fig. 1-6, comprises a flexible member 1 and a stent body connected in sequence from the proximal end to the distal end.

The support body is built-in ureter and renal pelvis, and the support body is hollow tubular and has offered a plurality of drainage holes 4 on the lateral wall, and drainage holes 4 are used for carrying out the drainage to the urine in ureter and the renal pelvis. The proximal end of the bracket body is provided with a liquid outlet.

The flexible component 1 is connected with the proximal end of the bracket body and is positioned at the periphery of the liquid outlet, and the flexible component 1 floats in the bladder.

According to the ureteral stent, the pigtail ring structure originally arranged in the bladder is replaced by the flexible member 1, and the flexible member 1 is connected with the stent body, so that the flexible member 1 floats in the bladder and does not touch the inner wall of the bladder, and further the bladder is not stimulated, and the occurrence rate of complications such as bladder stimulation and mucous membrane stimulation is effectively avoided.

The wire 5 is pulled when the stent is taken out. The traditional support can be generally worn to locate in the pipe shaft aperture of support pipe with taking out the silk thread, takes out the silk thread and passes in the aperture, and part stays in the pipe drainage chamber way, has to a certain extent to occupy the effective inner chamber of support pipe drainage chamber way, reduces and influences anticipated drainage effect. In order to solve the technical problem, the implementation is connected with the wire on the flexible component 1, and then the wire is not required to be connected to the drainage hole, so that the wire does not occupy the effective inner cavity of the catheter drainage cavity, the effective drainage area of the catheter inner cavity is increased, and the drainage effect is improved.

The flexible member 1 is a coil comprising at least one flexible wire having two ends, each of which is connected to the proximal end of the catheter 2, the plurality of coils being interlaced with each other. The coil is connected in such a way that two ends of the wire are connected with the guide tube in opposite directions to form a structure similar to a circle. As shown in fig. 2, the figure is provided with two coils, which are formed by connecting two wires with the proximal end of a catheter; as shown in fig. 3, the figure is provided with three coils, which are formed by three wires connected to the proximal end of the catheter. The connection method includes, but is not limited to, welding, bonding, and the like.

The wire is a flexible wire. According to the utility model, the traditional pigtail ring structure is replaced by the coil at the bladder end, so that the silk thread is soft in texture, the irritation and damage of the bladder of a patient can be effectively reduced, and the comfort and safety of the patient are improved. The number and shape of the coils can be adjusted according to the shape of the bladder of the patient so as to adapt to the needs of patients with different ages and sexes.

Because the utility model replaces the pigtail ring structure originally built in the bladder with the coil, the coil has fewer materials compared with the pigtail ring structure, and the catheter material at the ureter can be reduced.

The stent body comprises a catheter 2 and a pigtail 3 which are sequentially connected from a proximal end to a distal end, and further, the flexible member 1, the catheter 2 and the pigtail 3 in the embodiment are sequentially connected. The pigtail 3 is arranged in the renal pelvis and is suitable for draining urine in the renal pelvis. The catheter 2 is built-in and is suitable for drainage and delivery of urine. The distal end of the catheter 2 is provided with a liquid inlet connected with the pigtail 3, and the proximal end of the catheter 2 is provided with a liquid outlet. Drainage holes 4 are arranged on the side wall of the pigtail 3 and/or the catheter 2. As an alternative embodiment, the pigtail 3 may be replaced with other existing structures.

The pigtail coil body is inwards bent to form a spiral coil. The outer side wall of the pigtail 3 is provided with a plurality of drainage holes 4 at intervals, and urine in the renal pelvis can flow into the pigtail 3 through the drainage holes 4 and then flow into the catheter 2.

The pigtail 3 comprises a circle part 31 and a straight part 32, one end of the circle part 31 is communicated with the catheter 2, and the other end of the circle part 31 is communicated with the straight part 32. The straight part 32 is the tip of the pigtail ring 3, which is favorable for drainage guidance and reduces drainage resistance. The middle section is a straight pipe with the inner diameter and the outer diameter unchanged.

The body of the stent body is provided with a plurality of small holes at appropriate positions to increase drainage flow and improve fluid dynamics inside the catheter. The drainage aperture 4 is circular, oval, rectangular or any other shape. The drainage holes 4 are uniformly or unevenly distributed on the outer wall of the bracket body.

The coil, the catheter 2 and the pigtail 3 are respectively made of thermoplastic polymer materials. The catheter and the coil are made of thermoplastic polymer materials, have good biocompatibility and mechanical properties, can adapt to the ureter lengths and bending degrees of different patients, and improve the adaptability and stability of the catheter.

The proximal end of the catheter 2 is provided with a flaring 22. The flared structure 22 includes a straight section 221, a reduced diameter section 222, and a pinboard 223 integrally connected. The straight section 221 is integrally connected with the conduit 2, and a liquid outlet of the conduit 2 is formed in the straight section 221. The pinboard 223 is provided with two mutually symmetrical, the outer side wall of the pinboard 223 is arc-shaped, and a connecting groove 224 for positioning the flexible member 1 is formed between the two pinboards 223. The straight section is cut out of the groove and then connected with the wire rod to form a coil. Generally, the flared section gauge is 1Fr to 2Fr larger than the intermediate section gauge (if the intermediate section gauge is 5Fr, then the flared section gauge is 6Fr or 7 Fr). The utility model adopts the flaring section design, thereby being more convenient for positioning the coil.

The traditional stent cannula and the tube drawing are not easy, and complications such as urinary tract crystallization and the like are easily caused. In order to solve the technical problem, the outer wall surface of the whole stent body is coated with the hydrophilic lubricating coating, so that the formation of ureter crystallization complications can be reduced, simultaneously, the operations of intubation and tube drawing are convenient, and the damage to urinary tract tissues is reduced.

The manufacturing method of the utility model comprises the following steps:

1) Extruding and processing a thermoplastic polymer material into a conduit pipe body with required specification and length;

2) Heating the distal tip of the catheter and bending the catheter into a pigtail shape by using a die so that the distal end of the catheter forms a pigtail;

3) Heating the tip of the proximal end of the catheter, and flaring the tail end of the proximal end of the catheter by using a die to form a flaring section;

4) Cutting grooves in the straight section of the flaring section of the conduit by a cutter so as to leave welding space for wires, wherein the number of the grooves is 2 times of that of the coils;

5) Cutting the polymer wire into required length and quantity;

6) Connecting the two ends of the wire rod with the grooves of the flaring section to form a coil structure, wherein the connection modes can be welding, bonding and the like;

7) Coating a hydrophilic lubricating coating on the outer wall of the catheter;

8) And (3) punching holes at proper positions of the catheter body to finish the manufacturing of the ureteral stent with the coil structure.

When the device is placed, a guide wire matched with the catheter 2 is selected, the guide wire is inserted into the catheter 2 and the pigtail coil 3, so that the pigtail coil 3 is straightened, and then the device is integrally pushed to the urethra and pushed to a proper position along the urethra. And then the guide wire is extracted, the pigtail coil 3 is reduced to a pigtail shape and is placed in the renal pelvis, the catheter 2 is placed in the ureter, and the coil is placed in the bladder.

When the whole device is pulled out, the wire can be directly pulled out, the coil can be contracted into the urethra, and the whole device can be pulled out by the wire.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. And obvious variations or modifications thereof are contemplated as falling within the scope of the present utility model.

Claims (10)

1. A ureteral stent, which is characterized by comprising a flexible component (1) and a stent body which are sequentially connected from a proximal end to a distal end;

The bracket body is internally arranged in the ureter and the renal pelvis, the bracket body is hollow tubular, a plurality of drainage holes (4) are formed in the side wall of the bracket body, and a liquid outlet is formed in the proximal end of the bracket body;

The flexible component (1) is connected with the proximal end of the support body and is positioned at the periphery of the liquid outlet, and the flexible component (1) floats in the bladder.

2. Ureteral stent according to claim 1, characterized in that the flexible member (1) has connected thereto a withdrawal string (5).

3. A ureteral stent according to claim 1 or 2, characterized in that the flexible member (1) is a coil.

4. A ureteral stent according to claim 3, characterized in that the coil comprises at least one flexible wire, the flexible wire having two ends, and the two ends being connected to the proximal end of the stent body, respectively.

5. The ureteral stent according to claim 1, characterized in that the stent body comprises a catheter (2) and a pigtail (3) connected in sequence from a proximal end to a distal end;

the pigtail ring (3) is internally arranged in the renal pelvis and is suitable for draining urine in the renal pelvis;

The catheter (2) is internally arranged in the ureter and is suitable for draining and conveying urine;

the drainage hole (4) is arranged on the side wall of the pigtail ring (3) and/or the catheter (2).

6. The ureteral stent according to claim 5, characterized in that the flexible member (1) is a thermoplastic polymer material flexible member, the catheter (2) is a thermoplastic polymer material catheter, and the pigtail (3) is a thermoplastic polymer material pigtail.

7. A ureteral stent according to claim 5, characterized in that the proximal end of the catheter (2) is provided as a flaring structure (22).

8. The ureteral stent according to claim 7, characterized in that the flaring structure (22) comprises a straight section (221), a reducing section (222) and a plug board (223) that are integrally connected; the straight section (221) is integrally connected with the guide pipe (2), and the liquid outlet is formed in the straight section (221); the plug boards (223) are provided with two mutually symmetrical, and a connecting groove (224) for positioning the flexible component (1) is formed between the two plug boards (223).

9. The ureteral stent according to claim 5, characterized in that the pigtail (3) is bent into a spiral; the pigtail ring (3) comprises a circle part (31) and a straight part (32), one end of the circle part (31) is communicated with the catheter (2), and the other end of the circle part (31) is communicated with the straight part (32).

10. The ureteral stent according to claim 1, characterized in that the outer wall surface of the stent body is coated with a hydrophilic lubricating coating.