CN116139392B

CN116139392B - A new type of ureteral stent

Info

Publication number: CN116139392B
Application number: CN202211591253.1A
Authority: CN
Inventors: 王坤杰; 刘彧; 简钟宇
Original assignee: West China Hospital of Sichuan University
Current assignee: West China Hospital of Sichuan University
Priority date: 2022-12-12
Filing date: 2022-12-12
Publication date: 2024-12-13
Anticipated expiration: 2042-12-12
Also published as: CN116139392A

Abstract

The present invention discloses a novel ureteral stent, comprising a stent body, the middle part of the stent body is a straight tube section, one end of the straight tube section is provided with a hollow "J"-shaped head end structure, the other end is provided with a whisker-shaped or "J"-shaped tail end structure, the straight tube section comprises at least two branch tubes arranged side by side, the head ends of the branch tubes converge to the head end channel and communicate with the head end structure, and the inner dimension of the head end channel is larger than the hollow inner dimension of the head end structure. The novel ureteral stent of the present invention, by arranging at least two branch tubes in the straight tube section, can achieve the effect of placing at least two double J ureters through one catheterization, so as to promote the full drainage of hydronephrosis and the excretion of stone residues after kidney stone lithotripsy, and at the same time can reduce medical costs; it has a good application prospect in clinical practice.

Description

Novel ureteral stent

Technical Field

The invention relates to the technical field of medical instruments, in particular to a novel ureteral stent.

Background

The ureteral stent has wide application in urology surgery, including ① kidney stones and ureteral stone lithotripsy (ureteroscope/ureteroscope lithotripsy, percutaneous nephroscope lithotripsy, extracorporeal shock wave lithotripsy and the like), placing a ureteral stent tube to expand a ureter, promoting discharge of stone fragments, preventing ureteral stenosis caused by ureteral tissue edema or mucous membrane injury, ② ureteral stenosis after treatment such as ureteroplasty or ureteral dilatation and the like, ureteral stenosis patients which are unsuitable for operation treatment and need to replace the ureteral stent periodically, and the like, and the ureteral stent is required to be arranged to promote urine drainage and protect renal functions. However, the ureter double J tube conventionally arranged in clinical work has the defects that the lumen of the bracket is easy to be blocked, calculus removal after lithotripsy is insufficient, ureter stone street possibly appears after operation, the urine drainage effect is poor, and the like.

At present, domestic and foreign researches show that the indwelling of 2 ureteral stents is more beneficial to urine drainage and calculus fragment discharge. In Liu et al report, the effect of retaining a single 6Fr double J tube in a patient with ureteral stenosis caused by compression of 4 malignant exogenous tumors is poor, and after the patient is replaced by 2 4.7Fr double J tubes, the conditions of lumbago, hydronephrosis and the like of all patients are relieved earlier. Because ureteral stent drainage urine does not rely on the lumen drainage, mainly relies on the peristalsis function of peri-tube clearance and ureter self, when ureteral stent quantity increases, peri-tube clearance also can increase, and pipe Zhou Yinliu efficiency increases. It is also believed by the scholars that relative movement between ureteral stents can provide a sustained distending effect, preventing adhesions from forming. It has also been studied that by long-term follow-up, ureteral stenosis recurrence rate of three stents left after balloon dilation is found to be better than that of single and double stents.

However, placement of two or more ureteral stents at a time can increase medical costs and can also cause discomfort to the patient.

Disclosure of Invention

In order to solve the defects in the prior art, the invention provides the novel ureteral stent which can achieve the effect of arranging two or three ureters with double J tubes through one-time tube arrangement, promote the sufficient drainage of hydronephrosis and reduce the treatment cost.

In order to achieve the technical purpose, the invention adopts the following technical scheme:

The utility model provides a novel ureter support, includes the support body, support body middle part is the straight tube section, and straight tube section one end is equipped with hollow "J" type head end structure, and the other end is equipped with the tail end structure of whisker or "J" type, the straight tube section contains two at least branch pipes that set up side by side, and the head end of branch pipe is assembled to head end passageway and head end structure intercommunication, the internal dimension of head end passageway is greater than the cavity internal dimension of head end structure.

Further, the axis of the head end channel coincides with the axis of the head end structure connection position, or the axis of the head end channel is positioned at one side of the axis of the head end structure connection position and is parallel to the axis of the head end structure connection position.

Further, the tail end structure is whisker-shaped, and the whisker-shaped structure is distributed along the periphery of the outer wall of the branch pipe in a dispersing manner.

Further, the tail end structure is J-shaped, and a hollow channel communicated with the branch pipe is arranged in the tail end structure.

Further, the tail end structure is J-shaped, the tail end structure is hollow, the tail ends of the branch pipes are converged to the tail end channel to be communicated with the tail end structure, and the inner size of the tail end channel is larger than the hollow inner size of the tail end structure.

Further, the axis of the tail end channel is coincident with the axis of the tail end structure connection, or the axis of the tail end channel is positioned at one side of the axis of the tail end structure connection and is parallel to the axis of the tail end structure connection.

Further, the two branch pipes are connected with the outer walls of the two branch pipes, the centers of the two branch pipes are positioned on the same radial line, and the diameters of the two branch pipes are the same or different.

Further, the three branch pipes comprise two large-diameter branch pipes and one small-diameter branch pipe, or comprise two small-diameter branch pipes and one large-diameter branch pipe, or the diameters of the three branch pipes are the same.

Further, the three branch pipes are arranged in a 'delta' shape, and the outer walls of every two branch pipes in the three branch pipes are connected.

Further, three branch pipes are arranged in a Y shape, the three branch pipes are arranged in a triangle shape, the outer wall of the branch pipe at the top angle is connected with the outer wall of the branch pipe at two bottom angles, and the branch pipes at the two bottom angles are arranged at intervals.

Compared with the prior art, the invention has the beneficial effects that:

according to the novel ureteral stent, the head end structure is arranged in the renal pelvis, the tail end structure is arranged in the bladder, at least two branch pipes are arranged in the straight pipe section, liquid drained from the head end structure is shunted into the branch pipes, so that the peristaltic motion of the branch pipes is promoted, the periureteral gap is increased, the efficiency of the ureteral pipe Zhou Yinliu is improved, the effect of arranging at least two double J ureters can be achieved through one-time pipe arrangement, the full drainage of hydronephrosis is promoted, the drainage of calculus residues after the calculus lithotripsy of the kidney is promoted, the medical cost can be reduced, and the novel ureteral stent has a good application prospect in clinic.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of an embodiment of the present invention;

FIG. 2 is a schematic diagram of a connection between a branch pipe and a headend structure according to an embodiment of the present invention;

FIG. 3 is a schematic view of a tail end structure according to an embodiment of the present invention;

FIG. 4 is a top view of the tail end structure shown in FIG. 3;

FIG. 5 is a schematic view of another exemplary tail end configuration according to an embodiment of the present invention;

FIG. 6 is a schematic cross-sectional view of a straight pipe section in an embodiment of the present invention.

Reference numerals 1-straight pipe section, 2-head end structure, 3-tail end structure, 4-branch pipe, 5-head end channel and 6-tail end channel.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. The components of the embodiments of the present application 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 application, as presented in the figures, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

The utility model provides a novel ureteral stent, shown as fig. 1, includes the support body, support body middle part is straight tube section 1, and straight tube section 1 one end is equipped with hollow "J" type head end structure 2, and the other end is equipped with must form or tail end structure 3 of "J", straight tube section 1 contains at least two branch pipes 4 that set up side by side, and the head end of branch pipe 4 is assembled to head end passageway 5 and is linked together with head end structure 2, the internal dimension of head end passageway 5 is greater than the cavity internal dimension of head end structure 2.

The axis of the head-end channel 5 coincides with the axis of the joint of the head-end structure 2, as shown in fig. 2 (b), or the axis of the head-end channel 5 is located on one side of the axis of the joint of the head-end structure 2 and is parallel to the axis of the joint of the head-end structure 2, as shown in fig. 2 (a).

In a preferred embodiment, the tail structure 3 is whisker-shaped, and the whisker-shaped structure is distributed along the periphery of the outer wall of the branch pipe 4, as shown in fig. 3 and 4.

In another preferred embodiment, the tail end structure 3 is in a shape of "J", and a hollow channel communicating with the branch pipe 4 is provided in the tail end structure 3, as shown in fig. 5 (a).

In another preferred embodiment, the tail end structure 3 is in a shape of "J", the tail end structure 3 is hollow, the tail ends of the branch pipes 4 are gathered to the tail end channels 6 to be communicated with the tail end structure 3, and the inner dimension of the tail end channels 6 is larger than the hollow inner dimension of the tail end structure 3. Further, the axis of the tail end channel 6 coincides with the axis of the junction of the tail end structure 3 as shown in fig. 5 (c), or the axis of the tail end channel 6 is positioned on one side of the axis of the junction of the tail end structure 3 and is parallel to the axis of the junction of the tail end structure 3 as shown in fig. 5 (b).

The number and the arrangement of the branch pipes 4 are as shown in fig. 6:

In some embodiments, the two branch pipes 4 are connected to the outer walls of the two branch pipes 4, the centers of the two branch pipes 4 are located on the same radial line, and the diameters of the two branch pipes 4 are the same or different, as shown in fig. 6 (a) and fig. 6 (b).

In other embodiments, the branch pipes 4 are three in total. Preferably, the three branch pipes 4 are arranged in a 'delta' shape, the outer walls of every two branch pipes in the three branch pipes are connected, as shown in fig. 6 (c, d and e), and the other preferably, the three branch pipes 4 are arranged in a 'delta' shape, the three branch pipes 4 are arranged in a triangle shape, the outer wall of the branch pipe at the top angle is connected with the outer wall of the branch pipe at the two bottom angles, and the branch pipes at the two bottom angles are arranged at intervals, as shown in fig. 6 (f, g and h).

The three branch pipes include two large-diameter branch pipes and one small-diameter branch pipe, or include two small-diameter branch pipes and one large-diameter branch pipe, or the diameters of the three branch pipes are the same, as shown in fig. 6 (c) to (h).

It should be noted that the length, material, hardness, hydrophilicity, etc. of the ureteral stent, which are not specifically described in the examples, can be achieved by the disclosure of the prior art.

According to the novel ureteral stent, at least two side-by-side branch pipes are arranged in the straight pipe section, the effect of arranging at least two double J ureters can be achieved through one-time pipe arrangement, so that the full drainage of hydronephrosis is promoted, the excretion of calculus residues after kidney calculus lithotripsy is promoted, and the novel ureteral stent has a good application prospect in clinic.

Of course, the present invention is capable of other various embodiments and its several details are capable of modification and variation in light of the present invention by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. The novel ureteral stent is characterized by comprising a stent body, wherein the middle part of the stent body is a straight pipe section (1), one end of the straight pipe section (1) is provided with a hollow J-shaped head end structure (2), the other end of the straight pipe section is provided with a whisker-shaped or J-shaped tail end structure (3), the straight pipe section (1) comprises at least two side-by-side branch pipes (4), the head ends of the branch pipes (4) are converged into a head end channel (5) to be communicated with the head end structure (2), the inner size of the head end channel (5) is larger than the hollow inner size of the head end structure (2), and the axis of the head end channel (5) is positioned at one side of the axis of the joint of the head end structure (2) and is parallel to the axis of the joint of the head end structure (2);

The tail end structure (3) is whisker-shaped, and the whisker-shaped structure is distributed along the periphery of the outer wall of the branch pipe (4) in a dispersing manner, or:

the tail end structure (3) is J-shaped, a hollow channel communicated with the branch pipe (4) is arranged in the tail end structure (3), the tail ends of the branch pipes (4) are converged to the tail end channel (6) to be communicated with the tail end structure (3), the inner size of the tail end channel (6) is larger than the hollow inner size of the tail end structure (3), and the axis of the tail end channel (6) is located on one side of the axis of the joint of the tail end structure (3) and is parallel to the axis of the joint of the tail end structure (3).

2. The novel ureteral stent according to claim 1, characterized in that the two branch pipes (4) are connected with the outer walls of the two branch pipes (4), the centers of the two branch pipes (4) are positioned on the same radial line, and the diameters of the two branch pipes (4) are the same or different.

3. The novel ureteral stent according to claim 1, characterized in that the number of the branch pipes (4) is three, and the three branch pipes comprise two large-diameter branch pipes and one small-diameter branch pipe, or comprise two small-diameter branch pipes and one large-diameter branch pipe, or the diameters of the three branch pipes are the same.

4. The novel ureteral stent according to claim 3, characterized in that three branch pipes (4) are arranged in a 'delta' shape, and the outer walls of two branch pipes of the three branch pipes (4) are connected.

5. The novel ureteral stent according to claim 3, characterized in that three branch pipes (4) are arranged in a shape of a Chinese character 'V', the three branch pipes (4) are arranged in a triangle shape, the outer wall of the branch pipe at the top angle is connected with the outer walls of the branch pipes at two bottom angles, and the branch pipes at the two bottom angles are arranged at intervals.