A new type of ureteral stent

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

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a novel ureteral stent. Background Art

[0002] Ureteral stents are widely used in urology, including: ① After kidney stone and ureteral stone lithotripsy (ureteroscopy / flexible ureteroscopy lithotripsy, percutaneous nephrolithotomy, extracorporeal shock wave lithotripsy, etc.), ureteral stents are placed to dilate the ureter, promote the discharge of stone fragments, and prevent ureteral stenosis caused by ureteral tissue edema or mucosal damage; ② After ureteroplasty or ureteral dilation, ureteral stenosis patients who are not suitable for surgical treatment and need to replace ureteral stents regularly need to place ureteral stents to promote urine drainage and protect renal function. However, the ureteral double J tubes that are routinely placed in clinical work currently have shortcomings such as easy blockage of the stent lumen, insufficient stone discharge after lithotripsy, possible ureteral stone street after surgery, and poor urine drainage effect.

[0003] At present, domestic and foreign studies have shown that the retention of two ureteral stents is more conducive to urine drainage and the discharge of stone fragments. In the report by Liu et al., the effect of retaining a single 6Fr double J tube in 4 patients with ureteral stenosis caused by compression of malignant exogenous tumors was poor. After replacing with two 4.7Fr double J tubes, all patients' low back pain and hydronephrosis were relieved. Because the drainage of urine by ureteral stents does not rely on lumen drainage, but mainly relies on the peritubular space and the peristaltic function of the ureter itself, when the number of ureteral stents increases, the peritubular space will also increase, and the peritubular drainage efficiency will increase. Some scholars also believe that the relative movement between ureteral stents can provide a continuous expansion effect and prevent adhesion formation. There are also studies that have found through long-term follow-up that the recurrence rate of ureteral stenosis with three stents after balloon dilatation is better than that of single and double stents.

[0004] However, placing two or more ureteral stents at one time increases medical costs and also causes discomfort to patients. Summary of the invention

[0005] In order to solve the above-mentioned deficiencies in the prior art, the present invention provides a novel ureteral stent, which can achieve the effect of placing two or three ureteral double-J tubes through one catheterization, promote sufficient drainage of hydronephrosis, and reduce treatment costs.

[0006] In order to achieve the above technical purpose, the technical solution adopted by the present invention is:

[0007] A novel ureteral stent, comprising a stent body. The middle part of the stent body is a straight pipe section. One end of the straight pipe section is provided with a hollow "J"-shaped head end structure, and the other end is provided with a whisker-shaped or "J"-shaped tail end structure. The straight pipe section includes at least two side-by-side arranged branch pipes. The head ends of the branch pipes converge to a head end channel and are connected to the head end structure. The inner dimension of the head end channel is larger than the hollow inner dimension of the head end structure.

[0008] Further, the axis of the head end channel coincides with the axis at the connection of the head end structure; or the axis of the head end channel is located on one side of the axis at the connection of the head end structure and is parallel to the axis at the connection of the head end structure.

[0009] Further, the tail end structure is whisker-shaped, and the whisker-shaped structure is distributed in a radially emitting manner along the outer periphery of the branch pipe wall.

[0010] Further, the tail end structure is "J"-shaped, and a hollow channel communicating with the branch pipe is provided inside the tail end structure.

[0011] Further, the tail end structure is "J"-shaped and hollow. The tail ends of the branch pipes converge to a tail end channel and are connected to the tail end structure. The inner dimension of the tail end channel is larger than the hollow inner dimension of the tail end structure.

[0012] Further, the axis of the tail end channel coincides with the axis at the connection of the tail end structure; or the axis of the tail end channel is located on one side of the axis at the connection of the tail end structure and is parallel to the axis at the connection of the tail end structure.

[0013] Further, there are two branch pipes in total. The outer walls of the two branch pipes are connected; the centers of the two branch pipes are on the same diameter line, and the diameters of the two branch pipes are the same or different.

[0014] Further, there are three branch pipes in total; among the three branch pipes, there are two large-diameter branch pipes and one small-diameter branch pipe, or there are two small-diameter branch pipes and one large-diameter branch pipe, or the diameters of the three branch pipes are the same.

[0015] Further, the three branch pipes are arranged in a "pin" shape, and the outer walls of the two-by-two branch pipes among the three branch pipes are connected.

[0016] Further, the three branch pipes are arranged in a "human" shape, the three branch pipes are arranged in a triangular layout, the outer wall of the branch pipe at the top angle is connected to the outer walls of the branch pipes at the two bottom angles, and the branch pipes at the two bottom angles are arranged at intervals.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] The novel ureteral stent of the present invention has a head end structure placed in the renal pelvis and a tail end structure placed in the bladder. By arranging at least two branches in the straight tube section, the liquid drained from the head end structure is shunted into the branches, thereby promoting the peristalsis of the branches, increasing the periureteral space, and improving the periureteral drainage efficiency. By placing the catheter once, the effect of placing at least two double-J ureters can be achieved, so as to promote the adequate drainage of hydronephrosis and the excretion of stone residues after kidney stone lithotripsy. At the same time, the medical cost can be reduced, and the novel ureteral stent has a good application prospect in clinical practice. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 is a schematic structural diagram of an embodiment of the present invention;

[0021] Figure 2 is a schematic diagram of the connection between the branch pipe and the head end structure in an embodiment of the present invention;

[0022] Figure 3 is a schematic diagram of a tail end structure in an embodiment of the present invention;

[0023] Figure 4 yes Figure 3 A top view of the tail end structure shown;

[0024] Figure 5 are schematic diagrams of other tail end structures in embodiments of the present invention;

[0025] Figure 6 A schematic cross-sectional view of a straight pipe section in an embodiment of the present invention.

[0026] Figure numerals: 1-straight pipe section, 2-head end structure, 3-tail end structure, 4-branch pipe, 5-head end channel, 6-tail end channel. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians of the art without making creative work are within the scope of protection of the present application.

[0028] A new type of ureteral stent, such as Figure 1 As shown, it includes a bracket body, the middle part of the bracket 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, and the other end is provided with a whisker-shaped or "J"-shaped tail end structure 3, the straight pipe section 1 includes at least two branch pipes 4 arranged side by side, the head ends of the branch pipes 4 converge into a head end channel 5 and are connected with the head end structure 2, and the inner dimension of the head end channel 5 is larger than the hollow inner dimension of the head end structure 2.

[0029] The axis of the head end channel 5 coincides with the axis of the connection of the head end structure 2. Figure 2 (b); or the axis of the head end channel 5 is located on one side of the axis of the connection of the head end structure 2, and is parallel to the axis of the connection of the head end structure 2, as shown in FIG. Figure 2 (a) shown.

[0030] In a preferred embodiment, the tail end structure 3 is in the shape of a whisker, and the whisker-like structure is arranged in a diffuse manner along the outer periphery of the outer wall of the branch pipe 4, such as Figure 3 , Figure 4 shown.

[0031] In another preferred embodiment, the tail end structure 3 is in a "J" shape, and a hollow channel communicating with the branch pipe 4 is provided in the tail end structure 3, such as Figure 5 (a) shown.

[0032] In another preferred embodiment, the tail end structure 3 is "J" shaped, the tail end structure 3 is hollow, the tail ends of the branch pipes 4 converge into the tail end channel 6 and communicate with the tail end structure 3, and the inner dimension of the tail end channel 6 is larger than the hollow inner dimension of the tail end structure 3. Furthermore, the axis of the tail end channel 6 coincides with the axis of the connection of the tail end structure 3, such as Figure 5 (c); or the axis of the tail end channel 6 is located on one side of the axis of the connection of the tail end structure 3, and is parallel to the axis of the connection of the tail end structure 3, such as Figure 5 (b) as shown.

[0033] The number and position arrangement of the branch pipes 4 are as Figure 6 shown:

[0034] In some embodiments, there are two branch pipes 4 in total, and the outer walls of the two branch pipes 4 are connected; the centers of the two branch pipes 4 are on the same radial line, and the diameters of the two branch pipes 4 are the same or different, as Figure 6 (a, b) shown.

[0035] In other embodiments, there are three branch pipes 4 in total. Preferably, the three branch pipes 4 are arranged in a "pin" shape, and the outer walls of two of the three branch pipes are connected, as Figure 6 (c, d, e); Another preference is that the three branch pipes 4 are arranged in a "person" shape, the three branch pipes 4 are arranged in a triangle, the outer wall of the branch pipe at the top angle is connected to the outer walls of the branch pipes at the two bottom angles, and the branch pipes at the two bottom angles are arranged at intervals, as Figure 6 (f, g, h).

[0036] Among the three branch pipes, there are two branch pipes with large diameters and one branch pipe with a small diameter, or there are two branch pipes with small diameters and one branch pipe with a large diameter, or the diameters of the three branch pipes are the same, as Figure 6 (c - h) shown.

[0037] It should be particularly noted that the length, material, hardness, hydrophilicity, etc. of the ureteral stent not specifically described in the embodiments can all be realized through the content disclosed in the prior art.

[0038] The novel ureteral stent of the present invention can, by arranging at least two side-by-side branch pipes in the straight pipe section, achieve the effect of placing at least two double-J ureteral stents through one catheterization, so as to promote the full drainage of hydronephrosis and the excretion of stone residues after lithotripsy of kidney stones, and has good application prospects in clinical practice.

[0039] Of course, the present invention can also have many other embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes and deformations according to the present invention, but these corresponding changes and deformations should all fall within the protection scope of the appended claims of the present invention.

Claims

1. A novel ureteral stent, characterized in that: It includes a stent body. 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), and the other end is provided with a whisker-shaped or "J"-shaped tail end structure (3). The straight pipe section (1) includes at least two branch pipes (4) arranged side by side. The head ends of the branch pipes (4) converge to a head end channel (5) and communicate with the head end structure (2). The inner dimension of the head end channel (5) is larger than the hollow inner dimension of the head end structure (2). The axis of the head end channel (5) is located on one side of the axis of the connection of the head end structure (2) and is parallel to the axis of the connection of the head end structure (2). The tail end structure (3) is whisker-shaped, and the whisker-shaped structure is arranged in a radially distributed manner along the outer periphery of the outer wall of the branch pipe (4); or: The tail end structure (3) is "J"-shaped. A hollow channel communicating with the branch pipe (4) is provided inside the tail end structure (3). The tail ends of the branch pipes (4) converge to a tail end channel (6) and communicate with the tail end structure (3). The inner dimension of the tail end channel (6) is larger than the hollow inner dimension of the tail end structure (3). The axis of the tail end channel (6) is located on one side of the axis of the connection of the tail end structure (3) and is parallel to the axis of the connection of the tail end structure (3).

2. The novel ureteral stent according to claim 1, characterized in that: There are two branch pipes (4) in total, and the outer walls of the two branch pipes (4) are connected; the centers of the two branch pipes (4) are on the same diameter 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: There are three branch pipes (4) in total; among the three branch pipes, there are two large-diameter branch pipes and one small-diameter branch pipe, or there are 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 is characterized in that: The three branch pipes (4) are arranged in a "pin" shape, and the outer walls of the two-by-two branch pipes among the three branch pipes (4) are connected.

5. The novel ureteral stent according to claim 3, characterized in that: The three branch pipes (4) are arranged in a "human" shape, and the three branch pipes (4) are arranged in a triangular layout. The outer wall of the branch pipe at the top angle is connected to the outer walls of the branch pipes at the two bottom angles, and the branch pipes at the two bottom angles are arranged at intervals.

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