Ureteral stent

Abstract

The utility model relates to the technical field of medical instruments, and particularly discloses a ureteral stent which comprises a catheter and a one-way valve, one end of the catheter is provided with a first curly section, the other end of the catheter is provided with a second curly section, and the one-way valve is formed by two integrally-formed diaphragms which are attached to each other. One part of the second curled section extends into the space between the two membranes through the liquid inlet end, liquid outlet holes are formed in the side wall of the second curled section, the liquid outlet holes are located in the part, extending into the space between the two membranes, of the second curled section, the liquid outlet direction of at least one liquid outlet hole intersects with the first direction, and the first direction is the opposite direction of the two membranes; according to the scheme, the two diaphragms are attached to each other to enable the one-way valve to be in a closed state, urine can be effectively prevented from flowing back to the kidney to cause kidney injury, the liquid outlet direction of the first liquid outlet hole in the second curly section intersects with the first direction, and even if the two diaphragms are attached to each other to enable the one-way valve to be in the closed state, the urine can be effectively prevented from flowing back to the kidney. When the catheter is in use, the membrane is difficult to shield the liquid outlet hole, and urine at the pelvis can still flow through the catheter and flow into the one-way valve through the unshielded liquid outlet hole, so that the urine at the bladder is prevented from flowing back to the kidney, the urine conveying smoothness can be ensured, and the safety of the kidney is further ensured.

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 and a one-way valve, wherein a first curled section is provided at one end of the catheter, and a second curled section is provided at the other end of the catheter, and the one-way valve is formed by two integrally formed diaphragms that are bonded to each other, and a portion of the second curled section extends between the two diaphragms through the liquid inlet end.

[0007] A liquid outlet hole is opened on the side wall of the second curled section, and the liquid outlet hole is located in the part of the second curled section extending between the two membrane sheets, and the liquid outlet direction of at least one of the liquid outlet holes intersects with the first direction, and the first direction is the relative direction of the two membrane sheets.

[0008] Furthermore, the number of the liquid outlet holes is two, and the liquid outlet directions of the two liquid outlet holes are distributed in different radial directions of the conduit.

[0009] Furthermore, the number of the liquid outlet holes is two, and when the liquid outlet direction of one of the liquid outlet holes coincides with the first direction, the angle between the liquid outlet direction of the other liquid outlet hole and the first direction is 30°≤α≤150°.

[0010] Furthermore, the number of the liquid outlet holes is three, and the three liquid outlet holes are distributed along the circumference of the conduit. When the liquid outlet direction of one of the liquid outlet holes coincides with the first direction, the other two liquid outlet holes are distributed on both sides of the first direction.

[0011] Furthermore, when there are at least two liquid outlet holes, the at least two liquid outlet holes are distributed along the axial direction of the conduit.

[0012] Furthermore, along the second direction, the one-way valve includes an expansion section and a release section, the width of the expansion section gradually increases until it is connected to the release section, the second curled section extends to the expansion section, and the second direction is the flow direction of urine in the one-way valve.

[0013] Further, along the second direction, an extension length of the expansion section is smaller than an extension length of the release section.

[0014] Furthermore, a plurality of liquid inlet holes are provided on the side wall of the first curled section, and the plurality of liquid inlet holes are distributed along the extension path of the first curled section.

[0015] Furthermore, the plurality of liquid inlet holes are opened on at least one side of the first curled section.

[0016] Furthermore, the conduit is provided with marking parts distributed along its extension direction.

[0017] The technical solution adopted by the utility model can achieve the following beneficial effects:

[0018] The ureteral stent of the present application, when there is a lot of urine in the bladder, the two diaphragms fit together to keep the one-way valve in a closed state, which can effectively prevent urine from flowing back to the kidneys and causing kidney damage. The outlet direction of the first outlet hole on the second curled section intersects with the first direction. Even when the two diaphragms fit together to keep the one-way valve in a closed state, it is difficult for the diaphragms to block the outlet holes. Urine in the renal pelvis can still flow through the catheter and flow into the one-way valve through the unblocked outlet holes. While preventing urine in the bladder from flowing back to the kidneys, it can ensure the smoothness of urine transportation and further ensure the safety of the kidneys. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] 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.

[0020] Figure 1is a schematic structural diagram of a ureteral stent according to an embodiment of the present application;

[0021] Figure 2 yes Figure 1 A local enlarged schematic diagram of the middle A;

[0022] Figure 3 yes Figure 2 A partial enlarged schematic diagram of point B in the middle;

[0023] Figure 4 is a schematic structural diagram of a catheter according to an embodiment of the present application;

[0024] Figure 5 yes Figure 4 A partial enlarged schematic diagram of point C in the middle;

[0025] Figure 6 is a schematic structural diagram of a one-way valve according to an embodiment of the present application;

[0026] Figure 7 is a schematic diagram of the second curled section of the embodiment of the present application extending into the one-way valve;

[0027] Figure 8 Schematic diagram of the distribution of liquid outlet holes in an embodiment of the present application.

[0028] In the figure:

[0029] 100, catheter; 110, first curled section; 111, liquid inlet; 120, second curled section; 121, liquid outlet; 200, one-way valve; 200a, diaphragm; 210, expansion section; 220, release section. DETAILED DESCRIPTION

[0030] 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.

[0031] 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.

[0032] The following is combined with Figures 1 to 8 , the ureteral stent provided in the embodiment of the present application is described in detail through specific embodiments and their application scenarios.

[0033] 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 and a one-way valve 200, wherein 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 thereof, and the catheter 100 has a liquid outlet port at the other end thereof, 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.

[0034] A first curled section 110 is provided at one end of the catheter 100, and the first curled section 110 is located in the renal pelvis. A second curled section 120 is provided at the other end of the catheter 100, and the second curled section 120 is located in the bladder. The curled portions are provided at both ends of the catheter 100, which can increase the contact area between the 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 portions 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.

[0035] See also Figure 3 , Figure 6 and Figure 7 The one-way valve 200 is formed by two integrally formed diaphragms 200a that are bonded together. One end of the one-way valve 200 is the liquid inlet end, and the other end of the one-way valve 200 is the liquid outlet end. Part of the second curled section 120 extends between the two diaphragms 200a through the liquid inlet end. When there is a lot of urine in the bladder, the two diaphragms 200a will bond together under the action of urine pressure and be in a closed state, which can prevent the urine in the bladder from flowing back to the kidneys through the catheter 100 and causing kidney damage.

[0036] In the examples of this application, see Figure 4 and Figure 5 , a liquid outlet hole 121 is opened on the side wall of the second curled section 120, and the liquid outlet hole 121 is located at the portion of the second curled section 120 extending into the two membrane sheets 200a, and the liquid outlet direction of at least one liquid outlet hole 121 intersects with the first direction, and the first direction is the relative direction of the two membrane sheets 200a. For example, see Figure 7 , the first direction can be Figure 7 The middle upper diaphragm 200a faces the direction of the lower diaphragm 200a. In this way, even when the two diaphragms 200a are attached to each other to make the one-way valve 200 in a closed state, it is difficult for the diaphragm 200a to block the liquid outlet 121. The urine in the renal pelvis can still flow through the catheter 100 and flow into the one-way valve 200 through the unblocked liquid outlet 121. While preventing the urine in the bladder from flowing back to the kidneys, it can ensure the smoothness of urine transportation and further ensure the safety of the kidneys.

[0037] In an alternative implementation, see Figure 7 The number of the liquid outlet holes 121 can be two, and the liquid outlet directions of the two liquid outlet holes 121 are distributed in different radial directions of the catheter 100. In this way, when the catheter 100 and the one-way valve 200 are assembled, there is a situation where the liquid outlet directions of the two liquid outlet holes 121 intersect with the first direction, and the two diaphragms 200a will not block the two liquid outlet holes 121. Even if one of the liquid outlet holes 121 is blocked by any one of the diaphragms 200a, the other liquid outlet hole 121 will definitely not be blocked, so that the assembly of the catheter 100 and the one-way valve 200 has greater randomness, which can significantly improve the assembly efficiency of the ureteral stent.

[0038] For further technical solutions, please continue to refer to Figure 7 When the liquid outlet direction of one of the liquid outlet holes 121 coincides with the first direction, the angle between the liquid outlet direction of the other liquid outlet hole 121 and the first direction is 30°≤α≤150°, that is, the angle between the liquid outlet direction of the unshielded liquid outlet hole 121 and the first direction is 30°≤α≤150°. In this case, the diaphragm 200a is away from the unshielded liquid outlet hole 121, making it difficult for the diaphragm 200a to block the liquid outlet hole 121.

[0039] In an optional embodiment of the present application, the number of the liquid outlet holes 121 can be three, and the three liquid outlet holes 121 are distributed along the circumference of the catheter 100. When the liquid outlet direction of one of the liquid outlet holes 121 coincides with the first direction, the other two liquid outlet holes 121 are distributed on both sides of the first direction. Urine flows out from both sides of the first direction, which can increase the drainage efficiency of urine, prevent urine from being retained in the catheter 100, and reduce the risk of infection and stone formation.

[0040] For further technical solutions, see Figure 8 In the case where there are at least two liquid outlet holes 121, that is, when there are two or more liquid outlet holes 121, the liquid outlet holes 121 are distributed along the axial direction of the catheter 100. The liquid outlet holes 121 distributed along the extension direction of the catheter 100 can effectively reduce the pressure of urine inside the catheter 100 and increase the drainage efficiency of urine. When urine flows out through the liquid outlet holes 121 in multiple directions, they disperse the impact force of urine, reduce the pressure of urine on the patient's ureteral wall, and reduce damage or discomfort to the patient.

[0041] In the examples of this application, see Figure 6 , along the second direction, which is the flow direction of urine in the one-way valve 200, the one-way valve 200 includes an expansion section 210 and a release section 220 connected to the expansion section 210, the width of the expansion section 210 gradually increases until it is connected to the release section 220, the width of the release section 220 can be kept consistent, and the second curling section 120 extends to the expansion section 210. In this way, the expansion section 210 can be used as a storage space for the end portion of the second curling section 120. When there is a lot of urine in the bladder, based on the supporting effect of the part of the catheter 100 extending into the expansion section 210, the expansion section 210 is difficult to be compressed and completely fits together, and the urine applies pressure to the release section 220, so that the parts of the two diaphragms 200a corresponding to the release section 220 can fit together to prevent urine from reflux.

[0042] In a further technical solution, along the flow direction of urine in the one-way valve 200, the extension length of the expansion section 210 is smaller than the extension length of the release section 220. In this way, under the action of urine pressure, the diaphragm 200a of the entire one-way valve 200 has a larger contact area in the release section, which enhances the tightness of the fit between the diaphragm 200a and the catheter 100, and can reduce the possibility of urine in the bladder flowing back to the catheter 100, that is, the sealing effect on the backflow of urine is better, which helps to prevent urine reflux.

[0043] In the examples of this application, see Figure 2 A plurality of liquid inlet holes 111 are also provided on the side wall of the first curled section 110, and the plurality of liquid inlet holes 111 are distributed along the extension path of the first curled section 110. The setting of the plurality of liquid inlet holes 111 can increase the amount of urine entering the catheter 100, reduce the accumulation and retention of urine in the renal pelvis, and can drain the urine to the bladder in time.

[0044] For further technical solutions, please continue to refer to Figure 2, multiple liquid inlet holes 111 are opened on at least one side of the first curled section 110. It should be noted that in the embodiment of the present application, the liquid inlet holes 111 are opened on at least one side of the first curled section 110, which means that the first curled section 110 is curled to form a disc-shaped structure, and the liquid inlet holes 111 are opened on one side or both sides of the disc-shaped structure. The liquid inlet holes 111 are opened on one side of the disc-shaped structure, rather than on the radial inner side and radial outer side of the first curled section 110, so as to avoid the curled structure of the first curled section 110 itself from blocking and limiting the liquid inlet holes 111, and ensure the liquid inlet flow rate of the liquid inlet holes 111 as much as possible.

[0045] 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.

[0046] 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.

[0047] 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: include: A catheter (100), wherein one end of the catheter (100) is provided with a first curling section (110), and the other end of the catheter (100) is provided with a second curling section (120); A one-way valve (200), wherein the one-way valve (200) is formed by two integrally formed membranes (200a) being bonded to each other, and a portion of the second curled section (120) extends between the two membranes (200a); A liquid outlet hole (121) is provided on the side wall of the second curled section (120), and the liquid outlet hole (121) is located in the portion of the second curled section (120) extending between the two membrane sheets (200a), and the liquid outlet direction of at least one of the liquid outlet holes (121) intersects with the first direction, and the first direction is the relative direction of the two membrane sheets (200a).

2. The ureteral stent according to claim 1, characterized in that: The number of the liquid outlet holes (121) is two, and the liquid outlet directions of the two liquid outlet holes (121) are distributed in different radial directions of the conduit (100).

3. The ureteral stent according to claim 2, characterized in that: When the liquid outlet direction of one of the liquid outlet holes (121) coincides with the first direction, the angle between the liquid outlet direction of the other liquid outlet hole (121) and the first direction is 30°≤α≤150°.

4. The ureteral stent according to claim 1, characterized in that: The number of the liquid outlet holes (121) is three, and the three liquid outlet holes (121) are distributed along the circumference of the conduit (100). When the liquid outlet direction of one of the liquid outlet holes (121) coincides with the first direction, the other two liquid outlet holes (121) are distributed on both sides of the first direction.

5. The ureteral stent according to claim 3 or 4, characterized in that: When there are at least two liquid outlet holes (121), the at least two liquid outlet holes (121) are distributed along the axial direction of the conduit (100).

6. The ureteral stent according to claim 1, characterized in that: Along the second direction, the one-way valve (200) comprises an expansion section (210) and a release section (220), the width of the expansion section (210) gradually increases until it is connected to the release section (220), the second curled section (120) extends to the expansion section (210), and the second direction is the flow direction of urine in the one-way valve (200).

7. The ureteral stent according to claim 6, characterized in that: Along the second direction, the extension length of the expansion section (210) is smaller than the extension length of the release section (220).

8. The ureteral stent according to claim 1, characterized in that: A plurality of liquid inlet holes (111) are also provided on the side wall of the first curled section (110), and the plurality of liquid inlet holes (111) are distributed along the extension path of the first curled section (110).

9. The ureteral stent according to claim 8, characterized in that: The liquid inlet hole (111) is opened on at least one side of the first curled section (110).

10. The ureteral stent according to claim 1, characterized in that: The catheter (100) is provided with marking parts distributed along its extension direction.

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