Novel ureteral stent

Abstract

The utility model relates to the field of medical instruments, in particular to a novel ureter stent which comprises a renal pelvis section, a ureter section, a connecting line and a bladder section, the renal pelvis section is placed at a renal pelvis opening of a human body, the ureter section is placed in a ureter of the human body, the bladder section is placed in a bladder of the human body, and the renal pelvis section is connected with the ureter section. One end of the connecting line is connected with the ureter section, and the other end is connected with the bladder section. According to the novel ureteral stent, the ureteral section and the bladder section are connected through the connecting line, so that the bladder section can be in a semi-free state, stimulation to bladder mucosa is reduced, the diameter of the connecting part of the ureteral section and the bladder section is reduced due to the design of the connecting line, and the anti-reflux mechanism of a body is reserved; the problems of bladder stimulation symptoms and lumbago caused by a traditional ureter are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of medical devices, in particular to a new ureteral stent. BACKGROUND

[0002] The commonly used ureteral stent in the clinic is a hollow tube with multiple side holes and two curled ends, commonly known as a "double J tube stent". After being placed in the ureter through surgery, the two ends of the double J tube stent are located in the renal pelvis and the bladder, respectively, to support the ureteral lumen and drain urine in the kidney. The double J tube stent usually needs to be left in the body for 2-4 weeks, and some patients need to be left for a longer period of time.

[0003] However, about 78% of patients will experience bladder irritation symptoms such as frequent urination, urinary urgency, and hematuria after leaving the ureteral stent. The reason is that the ureterovesical segment is relatively long and fixed in position. When the activity is relatively large or the bladder is in an empty state, the ureteral stent ureterovesical segment will stimulate the bladder mucosa for a long time, leading to bladder irritation symptoms and even hematuria. About 30% of patients will experience lumbar pain after leaving the ureteral stent, which is due to the fact that the tubular structure connecting the ureteral segment and the bladder segment of the traditional ureteral stent destroys the anti-reflux mechanism of the ureterovesical wall segment, allowing urine to reflux to the kidney through the lumen or side wall, causing lumbar pain or acid distension. CONTENT OF THE UTILITY MODEL

[0004] The present application provides a new ureteral stent to solve the problems of bladder irritation symptoms and lumbar pain caused by traditional ureteral stents.

[0005] To solve the above technical problems, one technical solution adopted by the present application is to provide a new ureteral stent, which comprises a renal pelvis segment, a ureteral segment, a connecting line, and a bladder segment.

[0006] The renal pelvis segment is placed at the renal pelvis opening of the human body, the ureteral segment is placed in the ureter of the human body, and the bladder segment is placed in the bladder of the human body. The renal pelvis segment is connected to the ureteral segment, one end of the connecting line is connected to the ureteral segment, and the other end of the connecting line is connected to the bladder segment, so that the bladder segment is in a semi-free state.

[0007] Further, the connecting line is a nylon line that cannot be absorbed by the human body.

[0008] Further, the renal pelvis segment, the ureteral segment, and the bladder segment are all hollow tubes.

[0009] Further, the end of the renal pelvis segment away from the ureteral segment is curled and has a memory function.

[0010] Further, the surface of the new ureteral stent is provided with a plurality of through holes.

[0011] Furthermore, the bladder segment is coiled and has a memory function.

[0012] Furthermore, the renal pelvis segment, the ureter segment, and the bladder segment are all made of polyurethane material.

[0013] Furthermore, the connecting wire is 3cm long and 0.3mm in diameter.

[0014] Furthermore, the length of the ureteral segment is 22cm, 24cm, or 26cm.

[0015] Furthermore, the renal pelvis segment, the ureter segment, the connecting line, and the bladder segment are an integral structure.

[0016] The beneficial effects of this application are as follows: In the novel ureteral stent provided in this application, the ureteral segment and the bladder segment are connected by a connecting line, allowing the bladder segment to be in a semi-free state, reducing irritation to the bladder mucosa. Compared with the fixed position of the bladder segment in the traditional double-J stent, it achieves the effect of reducing or even eliminating bladder irritation symptoms. In addition, the design of the connecting line in this application reduces the diameter of the connection between the ureteral segment and the bladder segment, retains the body's own anti-reflux mechanism, and avoids urine reflux. Compared with the traditional double-J stent, it achieves the effect of reducing or even eliminating back pain. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0018] Figure 1 This is a schematic diagram of a novel ureteral stent provided in a specific embodiment of this application.

[0019] Explanation of reference numerals in the attached diagram: 100, renal pelvis segment; 200, ureter segment; 300, connecting line; 400, bladder segment; 500, through-hole. Detailed Implementation

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] It should be noted that if the embodiments of this application involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0022] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0023] like Figure 1 As shown, this application provides a novel ureteral stent, which includes a renal pelvis segment 100, a ureteral segment 200, a connecting line 300, and a bladder segment 400. The renal pelvis segment 100 is placed at the orifice of the renal pelvis, the ureteral segment 200 is placed in the ureter, and the bladder segment 400 is placed in the bladder. The renal pelvis segment 100 and the ureteral segment 200 are connected. One end of the connecting line 300 is connected to the ureteral segment 200, and the other end is connected to the bladder segment 400, so that the bladder segment 400 is in a semi-free state.

[0024] In one specific embodiment, preferably, the renal pelvis segment 100, ureter segment 200, and bladder segment 400 are all made of polyurethane material. The renal pelvis segment 100 is placed at the orifice of the renal pelvis, serving to support and drain the urine, ensuring smooth outflow and preventing urine accumulation. The ureter segment 200 is placed in the ureter, primarily to maintain ureteral patency and facilitate urine flow from the renal pelvis to the bladder. The ureter segment 200 connects to the renal pelvis segment 100, forming a continuous channel for urine flow. The length of the ureter segment 200 is 22cm, 24cm, or 26cm to accommodate patients of different heights. The connecting line 300 connects the ureter segment 200 and the bladder segment 400. Due to the flexibility of the connecting line 300, the bladder segment 400 is in a semi-free state, meaning it has some degree of relative mobility, unlike traditional stents which are completely fixed. Preferably, the connecting line 300 is 3 cm long and 0.3 mm in diameter. The bladder segment 400 is placed in the bladder, and its position and state are crucial for urine drainage and patient comfort. The semi-free state of the bladder segment 400 can reduce irritation to the bladder wall, thereby alleviating or even eliminating bladder irritation symptoms and improving patient comfort.

[0025] like Figure 1 As shown, the connecting wire 300 is a non-absorbable nylon thread.

[0026] In one specific embodiment, the connecting wire 300 is made of nylon, which possesses specific physical and chemical properties. It is not absorbable by the human body, meaning that after the stent is implanted, the connecting wire 300 can maintain its performance and structural stability for a relatively long period. The nylon wire has a certain strength and flexibility, enabling reliable connection between the ureteral segment 200 and the bladder segment 400, without connection failure or structural alteration due to absorption within the body.

[0027] like Figure 1 As shown, the renal pelvis segment 100, ureter segment 200, and bladder segment 400 are all hollow tubes.

[0028] In one specific embodiment, the renal pelvis segment 100, ureter segment 200, and bladder segment 400 are all designed as hollow tubular structures to allow urine to pass through smoothly. Urine flows from the renal pelvis into the hollow tubular structure of the renal pelvis segment 100, then sequentially through the hollow tubular structures of the ureter segment 200 and bladder segment 400, and is finally discharged out of the body. The inner diameter and other parameters of the hollow tubular structures are rationally designed based on human physiological structure and urine flow rate to ensure smooth urine flow.

[0029] like Figure 1As shown, the end of the renal pelvis segment 100 away from the ureteral segment 200 is coiled and has a memory function.

[0030] In one specific embodiment, the end of the renal pelvis segment 100 furthest from the ureteral segment 200 is coiled. This shape increases the contact area with the tissues surrounding the renal pelvis orifice, improving the stability of the stent at the renal pelvis orifice and preventing stent displacement or dislodgement. The coiled portion of the renal pelvis segment 100 has a memory function. During the implantation of the novel ureteral stent, the coiled portion of the renal pelvis segment 100 may be adjusted and deformed to some extent. However, once the coiled portion of the renal pelvis segment 100 enters the renal pelvis orifice, it will return to a suitable coiled state due to its memory function, better fulfilling its fixation role. This memory function ensures that the novel ureteral stent maintains a good position and function throughout the body.

[0031] like Figure 1 As shown, the surface of the new ureteral stent has several through holes 500.

[0032] In one specific embodiment, a plurality of through holes 500 are provided on the surface of the renal pelvis segment 100, the ureter segment 200 and the bladder segment 400. The through holes 500 are connected to the hollow part of the novel ureter. The function of the through holes 500 is to increase the flow path of urine. In addition to draining urine through the inside of the hollow tube, some urine can also be drained through the through holes 500 on the surface, so as to prevent impurities in the urine from clogging the tube to a certain extent and improve the drainage effect.

[0033] like Figure 1 As shown, bladder segment 400 is coiled and has memory function.

[0034] In one specific embodiment, the bladder segment 400 is coiled, a shape that increases its stability and adaptability within the bladder. The coiled shape allows for better contact with the bladder wall, reducing irritation and preventing dislodgement of the novel ureteral stent. The bladder segment 400's memory function allows it to return to a suitable coiled shape after implantation, better adapting to the bladder's shape and movement.

[0035] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A novel ureteral stent, characterized in that, The application relates to a novel ureteral stent, which comprises a renal pelvis section (100), a ureter section (200), a connecting line (300) and a bladder section (400). The renal pelvis section (100) is arranged at the renal pelvis opening of a human body, is used for playing a supporting and draining role at the renal pelvis opening, and can ensure that urine in the renal pelvis can flow out smoothly and prevent the urine from accumulating in the renal pelvis; the ureter section (200) is arranged in the ureter of the human body, is used for maintaining the unobstructedness of the ureter, and helps the urine to flow from the renal pelvis to the bladder smoothly; the bladder section (400) is arranged in the bladder of the human body to reduce the stimulation to the inner wall of the bladder, so that the bladder irritation symptom can be reduced or even eliminated; the renal pelvis section (100) and the ureter section (200) are connected to form a continuous channel, so that the urine can flow in the channel; one end of the connecting line (300) is connected with the ureter section (200), and the other end of the connecting line (300) is connected with the bladder section (400); the connecting line (300) has flexibility, so that the bladder section (400) is in a semi-free state; the length of the connecting line (300) is 3 cm, and the diameter is 0.3 mm; the connecting line (300) is a nylon line which cannot be absorbed by the human body; the renal pelvis section (100), the ureter section (200) and the bladder section (400) are all hollow pipes; the end, away from the ureter section (200), of the renal pelvis section (100) is in a curled shape and has a memory function; the novel ureteral stent is provided with a plurality of through holes (500); the through holes (500) are in communication with the hollow part of the novel ureteral stent; the through holes (500) are used for increasing the flow path of the urine; in addition to draining the urine through the inside of the hollow pipe, part of the urine can also be drained through the through holes (500) on the surface, so as to prevent the impurities in the urine from blocking the pipe to a certain extent; the bladder section (400) is in a curled shape to increase the stability and adaptability of the bladder section (400) in the bladder and has a memory function; the renal pelvis section (100), the ureter section (200) and the bladder section (400) are all made of polyurethane material; the length of the ureter section (200) is 22 cm, 24 cm or 26 cm to adapt to patients with different heights; the renal pelvis section (100), the ureter section (200), the connecting line (300) and the bladder section (400) are in an integrated structure. ​

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