Ureteral stent
By setting multiple fluid holes and curling designs on the catheter of the ureter stent, the problem of poor urine drainage is solved, ensuring all-round urine drainage and stent patency, and improving treatment effect and patient comfort.
Patent Information
- Application Number
- CN202420877286.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-25
- Publication Date
- 2025-01-14
- Estimated Expiration
- 2034-04-25
AI Technical Summary
The existing ureteral stents have poor urine drainage during use, which leads to an increase in the pressure in the renal pelvis and may cause kidney damage.
A ureteral stent including a catheter is designed, which consists of a first curled section, an extension section and a second curled section. A plurality of permeable holes distributed in the axial and circumferential directions are arranged on the extension section to ensure the full range of urine. Drain and prevent clogging and urine reflux through a curling design and a check valve.
All-round drainage of urine is achieved, blocked stones or sediment is avoided, patency of ureteral stents is ensured, and treatment effect and comfort of the patient is improved.
Smart Images
Figure CN222341772U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of medical devices, in particular to a ureteral stent. Background Art
[0002] Ureteral stent is a hollow tube made of polymer material. It is widely used in urological surgery. Its main purpose is to ensure smooth drainage of urine from the kidney to the bladder, avoid the occurrence of ureteral stenosis and urinary fistula, and help the discharge of stone fragments.
[0003] Ureteral stents are mainly placed after ureteral stones or ureteral surgery, as well as other conditions that may cause ureteral obstruction, such as hydronephrosis, kidney transplantation, renal and ureteral tumors, ureteral stenosis, etc. In addition, before extracorporeal shock wave lithotripsy, gynecological surgery, and difficult surgery involving the retroperitoneal ureteral course, it is also necessary to place a ureteral stent in advance, which can play an important role in draining urine and preventing ureteral damage during surgery. However, when the ureteral stents in the related art are used, there is a problem of poor urine drainage, which leads to increased pressure in the renal pelvis and kidney damage. Utility Model Content
[0004] The utility model discloses a ureteral stent, which is used to solve the technical problem of poor urine drainage existing in the ureteral stent in the related technology.
[0005] In order to solve the above problems, the utility model adopts the following technical solutions:
[0006] The present application provides a ureteral stent, which includes a catheter, wherein the catheter includes a first curled section, an extension section and a second curled section connected in sequence, wherein a plurality of liquid inlet holes are arranged on the tube wall of the first curled section, a plurality of liquid through holes distributed along its extension direction are arranged on the tube wall of the extension section, and the plurality of liquid through holes are distributed along the circumference of the extension section, and a liquid outlet holes are arranged on the tube wall of the second curled section along its extension direction.
[0007] Furthermore, along the extension direction of the extension section, the opening directions of any two adjacent liquid holes are perpendicular to each other, and among any three adjacent liquid holes, the opening direction of the first liquid hole is opposite to the opening direction of the third liquid hole.
[0008] Further, the curling direction of the first curling section is opposite to the curling direction of the second curling section.
[0009] Further, along the curling direction of the first curling section, the liquid inlet hole is arranged on the radial inner side of the first curling section; and / or, along the curling direction of the second curling section, the liquid outlet hole is opened on the radial inner side of the second curling section.
[0010] Further, the curling angle of the first curling section is greater than 360°; and / or the curling angle of the second curling section is greater than 360°.
[0011] Furthermore, the first curled section includes a first annular base and a first curled extension connected to the first annular base, the first curled extension extends along the inner circumference of the first annular base, and the liquid inlet hole is provided on the radial inner side of the first annular base and the radial inner side of the first curled extension.
[0012] Furthermore, the second curled section includes a second annular base and a second curled extension connected to the second annular base, the second curled extension extends along the inner circumference of the second annular base, and the liquid outlet is provided on the radial inner side of the second annular base and the radial inner side of the second curled extension.
[0013] Furthermore, the conduit is provided with marking parts distributed along its extension direction.
[0014] Furthermore, the conduit is an integral structural component made of polymer material.
[0015] Furthermore, the ureteral stent also includes a one-way valve, which is formed by two integrally formed membranes that are bonded together, and the end of the second curled section extends into the one-way valve.
[0016] The technical solution adopted by the utility model can achieve the following beneficial effects:
[0017] The ureteral stent of the present application can achieve all-round drainage of urine from the kidney by providing a plurality of fluid holes distributed both along the axial direction and along the circumferential direction on the extension section, thereby avoiding the possibility that the fluid holes are blocked by stones or sediments in the urine when the fluid holes are opened in one direction, thereby ensuring the patency of the ureteral stent catheterization, thereby improving the treatment effect and comfort of the patient. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0019] Figure 1 is a schematic structural diagram of a ureteral stent according to an embodiment of the present application;
[0020] Figure 2 yes Figure 1 A local enlarged schematic diagram of the middle A;
[0021] Figure 3 yes Figure 1 A local enlarged schematic diagram of point B in the middle.
[0022] In the figure:
[0023] 100, catheter; 110, first curled section; 110a, first annular base; 110b, first curled extension; 111, liquid inlet; 120, extension section; 121, liquid through hole; 130, second curled section; 130a, second annular base; 130b, second curled extension; 131, liquid outlet. DETAILED DESCRIPTION
[0024] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the utility model.
[0025] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.
[0026] The following is combined with Figures 1 to 3 , the ureteral stent provided in the embodiment of the present application is described in detail through specific embodiments and their application scenarios.
[0027] See also Figure 1 and Figure 3 The embodiment of the present application discloses a ureteral stent, which is used in urological surgery to drain urine smoothly from the kidney to the bladder. The disclosed ureteral stent includes a catheter 100. The catheter 100 is a hollow tube structure with two ends connected, that is, the catheter 100 has a liquid inlet port at one end and a liquid outlet port at the other end. The liquid inlet port of the catheter 100 is located at the renal pelvis, and the liquid outlet port of the catheter 100 is located at the bladder. Urine produced in the renal pelvis can enter the catheter 100 through the liquid inlet port and be released to the bladder through the liquid outlet port.
[0028] In an embodiment of the present application, the catheter 100 includes a first curled section 110, an extension section 120 and a second curled section 130 connected in sequence, wherein a plurality of liquid inlet holes 111 are arranged on the tube wall of the first curled section 110, and the plurality of liquid inlet holes 111 are distributed along the extension direction of the first curled section 110; a plurality of liquid passage holes 121 are arranged on the tube wall of the extension section 120, and the plurality of liquid passage holes 121 are distributed along the extension direction of the extension section 120, and the plurality of liquid passage holes 121 are distributed along the circumference of the extension section 120 at the same time; and a plurality of liquid outlet holes 131 are arranged on the tube wall of the second curled section 130 and distributed along its extension direction.
[0029] Based on the above technical solution, when the ureteral stent of the embodiment of the present application is used, the doctor places the first curled section 110 in the renal pelvis and the second curled section 130 in the bladder. The first curled section 110 and the second curled section 130 can increase the contact area between the entire ureteral stent and the renal pelvis and bladder, thereby enhancing the supporting effect of the ureteral stent. When the ureteral stent is correctly placed, the curled parts at both ends of the catheter 100 can fit tightly on the mucosa of the renal pelvis and bladder, which can effectively prevent the ureteral stent from shifting or falling off. Urine in the renal pelvis can also enter the catheter 100 through the liquid inlet 111 on the first curled section 110, and can be released to the bladder through the liquid outlet 131 and the liquid outlet port on the second curled section 130.
[0030] In the embodiment of the present application, the extension section 120 is provided with a plurality of liquid holes 121 distributed both along its axial direction and along its circumferential direction. On the one hand, when urine flows through the extension section 120, the liquid holes 121 facing different directions can provide a more all-round drainage effect, which means that urine in the catheter 100 can flow out more easily through multiple holes, rather than relying solely on the liquid outlet port or the liquid outlet hole 131. On the other hand, if all the liquid holes 121 face one direction, then stones or sediments in the urine are more likely to block these liquid holes 121. By opening the plurality of liquid holes 121 in different directions, the risk of blockage can be reduced to a certain extent. At the same time, when urine flows through the extension section 120, the liquid holes 121 facing different directions can ensure that the pressure of urine is evenly distributed on the ureter wall, thereby avoiding excessive local pressure on the ureter wall and reducing the patient's discomfort.
[0031] In the examples of this application, see Figure 2 Along the extension direction of the extension section 120, the opening directions of any two adjacent liquid holes 121 are perpendicular to each other, and among any three adjacent liquid holes 121, the opening direction of the first liquid hole 121 is opposite to the opening direction of the third liquid hole 121. In this way, when urine flows through the extension section 120, stones or sediments in the urine are difficult to block the two liquid holes 121 with opposite opening directions at the same time, which can ensure the smoothness of urine drainage.
[0032] In a further technical solution, the curling direction of the first curling segment 110 is opposite to that of the second curling segment 130. The renal pelvis and the bladder are located upstream and downstream of the ureter, respectively, and their distribution directions relative to the ureter are not completely consistent. Therefore, the first curling segment 110 and the second curling segment 130 have opposite curling directions, which can better fit these two parts of the human body, reduce the movement of the ureteral stent in the body, and improve the patient's comfort.
[0033] In an optional embodiment of the present application, the first curled section 110 is curled to form a disc-shaped structure. Along the curling direction of the first curled section 110, the liquid inlet 111 is arranged on the radial inner side of the first curled section 110, rather than on one side of the disc-shaped structure. Under such a configuration, when the doctor places the first curled section 110 in the renal pelvis, the first curled section 110 itself can play a certain supporting and shaping role, ensuring that the liquid inlet 111 will not be blocked by the tissue at the renal pelvis, thereby ensuring the smoothness of the liquid inlet; similarly, along the curling direction of the second curled section 130, the liquid outlet 131 is opened on the radial inner side of the second curled section 130, so that the liquid outlet 131 will not be blocked by the tissue at the bladder, thereby ensuring the smoothness of urine release.
[0034] In the embodiment of the present application, the curling angle of the first curling section 110 is greater than 360°. The design of the curling angle greater than 360° makes it difficult for the first curling section 110 to be significantly pulled and deformed after being placed in the renal pelvis. In other words, the design of the curling angle greater than 360° can ensure the stability of the curling shape of the first curling section 110, thereby ensuring the stability of the first curling section 110 placed in the renal pelvis, and further preventing the ureteral stent from shifting or falling off. Similarly, the curling angle of the second curling section 130 is greater than 360°, which can ensure the stability of the second curling section 130 placed in the renal pelvis.
[0035] In a further technical solution, the first curling section 110 includes a first annular base 110a and a first curling extension 110b connected to the first annular base 110a, the first annular base 110a is connected to the extension section 120, and the first curling extension 110b extends along the inner circumference of the first annular base 110a. It can be understood that the first annular base 110a is a portion connected to the extension section 120 with a curling angle of exactly 360°, and the first curling extension 110b is a portion connected to the first annular base 110a exceeding 360°. The first curling extension 110b is connected to the first annular base 110a. There is a radial gap between the base bodies 110a. In the embodiment of the present application, the radial inner side of the first annular base body 110a and the radial inner side of the first curled extension portion 110b are both provided with the aforementioned liquid inlet hole 111. Under such a configuration, because the radial gap between the first annular base body 110a and the first curled extension portion 110b is small, it is difficult for the tissue mucosa at the renal pelvis to penetrate into the radial gap, and it is impossible to shield the liquid inlet hole 111 on the first curled extension portion 110b, thereby ensuring that urine at the renal pelvis can enter the catheter 100 through the liquid inlet hole 111 on the first curled extension portion 110b.
[0036] It should be noted that the curling angle of the first curling extension portion 110b may be less than, equal to or greater than 360°, and this application does not impose any specific limitation on this. Figure 2 The curling angle of the first curling extension portion 110b is equal to 360°, so that the first curling extension portion 110b is also curled to form a ring structure.
[0037] Similarly, in an optional embodiment of the present application, the second curled section 130 includes a second annular base 130a and a second curled extension 130b connected to the second annular base 130a, the second curled extension 130b extends along the inner circumference of the second annular base 130a, and a radial gap is provided between the second annular base 130a and the second curled extension 130b. Liquid outlet holes 131 are provided on the radial inner side of the second annular base 130a and the radial inner side of the second curled extension 130b. It is difficult for the tissue mucosa at the bladder to penetrate into the radial gap between the second annular base 130a and the second curled extension 130b to block the liquid outlet hole 131, thereby ensuring that urine can flow smoothly into the bladder and ensuring the smoothness of drainage.
[0038] In a further technical solution, the catheter 100 is provided with marking portions distributed along its extension direction. The marking portions may be in various forms such as graphics, numbers or scale lines. Through the marking portions, the doctor can ensure that the catheter 100 is inserted into the correct position when inserting the ureteral stent, avoiding insertion too deep or too shallow, thereby reducing possible complications.
[0039] In a further technical solution, the catheter 100 is an integral structural member made of a polymer material. For example, the catheter 100 may be made of a polyethylene material or a silicone rubber material.
[0040] In an optional embodiment of the present application, the ureteral stent may further include a one-way valve. The one-way valve may be formed by two integrally formed diaphragms that fit together. The end of the second curled section 130 extends deep into the one-way valve. When there is a lot of urine in the bladder, the two diaphragms will fit together under the action of urine pressure and be in a closed state, thereby preventing urine in the bladder from flowing back to the kidneys through the catheter and causing kidney damage.
[0041] It should be noted that, in this article, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise one..." do not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.
[0042] The above description is only a specific implementation of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention.
Claims
1. A ureteral stent, characterized in that: The catheter (100) comprises a first curled section (110), an extension section (120) and a second curled section (130) which are connected in sequence, wherein a plurality of liquid inlet holes (111) are arranged on the tube wall of the first curled section (110), a plurality of liquid passage holes (121) distributed along the extension direction thereof are arranged on the tube wall of the extension section (120), and the plurality of liquid passage holes (121) are distributed along the circumference of the extension section (120), and a plurality of liquid passage holes (121) are arranged on the tube wall of the second curled section (130) and distributed along the extension direction thereof.
2. The ureteral stent according to claim 1, characterized in that: Along the extension direction of the extension section (120), the opening directions of any two adjacent liquid passage holes (121) are perpendicular to each other, and among any three adjacent liquid passage holes (121), the opening direction of the first liquid passage hole (121) is opposite to the opening direction of the third liquid passage hole (121).
3. The ureteral stent according to claim 1, characterized in that: The curling direction of the first curling section (110) is opposite to the curling direction of the second curling section (130).
4. The ureteral stent according to claim 1, characterized in that: Along the curling direction of the first curling section (110), the liquid inlet hole (111) is arranged on the radial inner side of the first curling section (110); and / or, along the curling direction of the second curling section (130), the liquid outlet hole (131) is opened on the radial inner side of the second curling section (130).
5. The ureteral stent according to claim 4, characterized in that: The curling angle of the first curling section (110) is greater than 360°; and / or the curling angle of the second curling section (130) is greater than 360°.
6. The ureteral stent according to claim 5, characterized in that: The first curling section (110) comprises a first annular base (110a) and a first curling extension (110b) connected to the first annular base (110a); the first curling extension (110b) extends along the inner circumference of the first annular base (110a); and the liquid inlet hole (111) is provided on the radial inner side of the first annular base (110a) and the radial inner side of the first curling extension (110b).
7. The ureteral stent according to claim 5, characterized in that: The second curled section (130) comprises a second annular base (130a) and a second curled extension (130b) connected to the second annular base (130a); the second curled extension (130b) extends along the inner circumference of the second annular base (130a); and the liquid outlet hole (131) is provided on the radial inner side of the second annular base (130a) and the radial inner side of the second curled extension (130b).
8. The ureteral stent according to claim 1, characterized in that: The catheter (100) is provided with marking parts distributed along its extension direction.
9. The ureteral stent according to claim 1, characterized in that: The catheter (100) is an integral structural component made of a polymer material.
10. The ureteral stent according to claim 1, characterized in that: It also comprises a one-way valve (200), wherein the one-way valve (200) is formed by two integrally formed membranes that are bonded together, and the end of the second curled section (130) extends into the one-way valve (200).