Ureteral stent

Abstract

The utility model provides a kind of ureteral stent, in the ureteral stent, the first drainage hole is equipped on the pipe wall of ureteral stent pipe;The anti-sliding stent pipe is arranged at the first end of the ureteral stent pipe, the second drainage hole is equipped on the anti-sliding stent pipe;The anti-reflux membrane is arranged at the second end of the ureteral stent pipe, the positioning ball is arranged on the part of the ureteral stent pipe close to the anti-reflux membrane, for the anti-reflux membrane is positioned.The ureteral stent in the utility model is compared with the existing ureteral stent, and the structure design is ingenious to increase function, has anti-reflux design and the design of anti-reflux is positioned, when using, the tail of ureteral stent, i.e. the second end of ureteral stent will not be vertical in bladder, avoid to cause irritation to patient bladder neck, patient has foreign body sensation condition to occur, improve equipment use comfort, satisfy patient use demand.

Description

Technical Field

[0001] This utility model relates to the field of ureteral stent technology, and in particular to a ureteral stent. Background Technology

[0002] Ureteral stents are commonly used surgical instruments in urology. They are typically placed between the renal pelvis and bladder to support the ureter, drain urine, promote ureteral healing, and prevent ureteral stricture and adhesions when treating urinary stones, ureteral obstruction, or ureteral stricture. Some commercially available ureteral stents lack anti-reflux design, while others have no limit on anti-reflux design, resulting in poor effectiveness. When patients hold their urine or are in an improper lying position, urine may reflux into the ureter and renal pelvis, causing recurrent infections. Furthermore, the tail of the ureteral stent can irritate the bladder neck, causing a foreign body sensation. Summary of the Invention

[0003] This invention provides a ureteral stent to solve the problems of existing ureteral stents, which have simple structures and limited functions, and whose tail hangs down in the bladder during use, causing irritation to the bladder neck and a foreign body sensation in patients.

[0004] A ureteral stent includes a ureteral segment stent tube, an anti-slip stent tube, an anti-reflux membrane, and a positioning ball;

[0005] The ureteral stent tube has a first drainage hole on its wall;

[0006] The anti-slippage stent tube is disposed at the first end of the ureteral segment stent tube, and the anti-slippage stent tube is provided with a second drainage hole;

[0007] The anti-reflux membrane is disposed at the second end of the ureteral stent tube, and the positioning ball is disposed on the part of the ureteral stent tube near the anti-reflux membrane to limit the anti-reflux membrane.

[0008] Preferably, the wall of the ureteral segment stent tube is coated with a hydrophilic coating.

[0009] Preferably, the anti-slip support tube is a rewinding tubular structure.

[0010] Preferably, the anti-reflux membrane includes a cylindrical portion and a conical portion extending from one end of the cylindrical portion, the tip of the conical portion being disposed at the second end of the ureteral segment stent tube.

[0011] Preferably, the length of the ureteral segment stent tube is 195-205mm, the rewind length of the anti-slippage stent tube is 99-101mm, and the length of the anti-reflux membrane is 19-21mm.

[0012] Preferably, the ureteral stent further includes a dismantling structure; the dismantling structure passes through the anti-reflux membrane and connects to the second end of the ureteral stent tube.

[0013] Preferably, the dismantling structure includes a pull rope; one end of the pull rope passes through the anti-reflux membrane and is connected to the second end of the ureteral segment stent tube.

[0014] Preferably, the dismantling structure includes a connecting pipe, a buoyancy balloon, an inflation pipe, and a one-way inflation valve;

[0015] The first end of the connecting tube passes through the anti-reflux membrane and connects to the second end of the ureteral segment stent tube;

[0016] The first end of the buoyancy balloon is connected to the second end of the connecting tube, the second end of the buoyancy balloon is connected to the first end of the inflation tube, the buoyancy balloon is provided with an air inlet communicating with the inflation tube, and the second end of the inflation tube is provided with the one-way inflation valve.

[0017] Preferably, the junction between the first end of the buoyancy balloon and the second end of the connecting tube is a closed design.

[0018] Preferably, the dismantling structure further includes an inflation syringe, which is mounted on the one-way inflation valve and used to inflate the buoyancy balloon through the inflation tube.

[0019] The ureteral stent provided in this embodiment is placed in the patient's body. An anti-reflux membrane is set at the second end of the ureteral stent tube. Specifically, an installation position is provided at one end of the anti-reflux membrane, and the second end of the ureteral stent tube is embedded in the installation position. The anti-reflux membrane is a one-way membrane structure, so that urine flowing out of the anti-reflux membrane cannot flow into the anti-reflux membrane, preventing urine from flowing back into the ureteral renal pelvis along the ureteral stent tube when the patient is holding urine or in an improper lying position. The anti-reflux membrane is made of lightweight material and can float above the urine surface of the bladder, avoiding stimulation of the bladder neck and eliminating urinary tract irritation symptoms such as urinary frequency, urgency, and pain. The positioning ball is positioned near the anti-reflux membrane on the ureteral stent tube. Specifically, the positioning ball is a spherical structure that passes through the ureteral stent tube and is placed in the ureterovesical segment. This prevents the anti-reflux membrane from entering the ureter and limits its position within the bladder, preventing it from entering the ureter and causing blockage. It also prevents urine from flowing back into the ureter and renal pelvis due to urinary retention or improper lying posture. This design makes the ureteral stent in this example a single-J anti-displacement anti-reflux ureteral stent. Compared to existing ureteral stents, this ingenious design adds functionality, featuring anti-reflux design and a reflux-limiting design. During use, the tail end of the ureteral stent, the second end, will not droop into the bladder, avoiding irritation to the bladder neck and the patient's foreign body sensation, thus improving comfort and meeting patient needs. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a first structural diagram of a ureteral stent in one embodiment of the present invention;

[0022] Figure 2 This is a front view of the anti-slip support tube in one embodiment of this utility model;

[0023] Figure 3 This is a front view of the anti-backflow membrane in one embodiment of the present invention;

[0024] Figure 4 This is a second structural diagram of the ureteral stent in one embodiment of the present invention;

[0025] Figure 5 This is a second structural diagram of the dismantling structure in one embodiment of this utility model;

[0026] Figure 6 This is a front view of an air-filled syringe according to one embodiment of the present invention.

[0027] Among them, 1. Ureteral segment stent tube; 2. Anti-slip stent tube; 3. Anti-reflux membrane; 31. Cylindrical part; 32. Conical part; 4. Positioning ball; 5. First drainage hole; 6. Second drainage hole; 7. Removal structure; 71. Pull rope; 72. Connecting tube; 73. Buoyancy balloon; 74. Inflation tube; 75. One-way inflation valve; 76. Air inlet; 77. Inflation syringe. Detailed Implementation

[0028] To make the technical problems solved, the technical solutions, and the beneficial effects of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0029] In the description of this invention, it should be understood that the terms "longitudinal," "radial," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0030] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0031] This utility model provides a ureteral stent, as shown in the following embodiment. Figure 1 The ureteral stent includes a ureteral segment stent tube 1, an anti-slip stent tube 2, an anti-reflux membrane 3, and a positioning ball 4. The ureteral segment stent tube 1 has a first drainage hole 5 on its wall. The anti-slip stent tube 2 is located at the first end of the ureteral segment stent tube 1 and has a second drainage hole 6. The anti-reflux membrane 3 is located at the second end of the ureteral segment stent tube 1, and the positioning ball 4 is located on the ureteral segment stent tube 1 near the anti-reflux membrane 3 to limit the anti-reflux membrane 3.

[0032] As an example, the ureteral stent includes a ureteral segment stent tube 1, an anti-slip stent tube 2, an anti-reflux membrane 3, and a positioning ball 4. In use, the ureteral stent is inserted into the patient's body. The ureteral segment stent tube 1 is placed inside the patient's ureter. The ureteral segment stent tube 1 is a tubular structure with multiple first drainage holes 5 evenly distributed on its wall. These holes drain urine from the ureter and support and dilate the ureter, preventing adhesions. The anti-slip stent tube 2 is located at the first end of the ureteral segment stent tube 1. It is also a tubular structure fixed to the patient's renal pelvis, preventing the ureteral stent from slipping out of the renal pelvis. Multiple second drainage holes 6 are evenly distributed on the wall of the anti-slip stent tube 2 to drain urine produced by the kidney in the renal pelvis. The anti-reflux membrane 3 is located at the second end of the ureteral stent tube 1. Specifically, an installation position is provided at one end of the anti-reflux membrane 3, and the second end of the ureteral stent tube 1 is embedded in the installation position. The anti-reflux membrane 3 is a one-way membrane structure, so that urine flowing out of the anti-reflux membrane 3 cannot flow into the anti-reflux membrane 3, thus preventing urine from flowing back into the ureteral renal pelvis along the ureteral stent tube 1 when the patient is holding their urine or in an improper lying position. The anti-reflux membrane 3 is made of lightweight material and can float above the urine surface of the bladder, avoiding stimulation of the bladder neck and eliminating urinary tract irritation symptoms such as urinary frequency, urgency, and pain. The positioning ball 4 is positioned near the anti-reflux membrane 3 on the ureteral stent tube 1. Specifically, the positioning ball 4 is a spherical structure that passes through the ureteral stent tube 1 and is placed in the ureterovesical wall segment. This prevents the anti-reflux membrane 3 from entering the ureter and limits its position within the bladder, preventing it from entering the ureter and causing blockage. It also prevents urine from flowing back into the ureter and renal pelvis due to urinary retention or improper lying posture. This design makes the ureteral stent in this example a single-J anti-displacement and anti-reflux ureteral stent. Compared to existing ureteral stents, this ingenious structural design adds functionality, featuring anti-reflux design and a reflux-limiting design. During use, the tail end of the ureteral stent, i.e., the second end of the ureteral stent, will not droop into the bladder, avoiding irritation to the bladder neck and the patient's foreign body sensation, thus improving the comfort of the device and meeting the patient's needs.

[0033] In one embodiment, the wall of the ureteral segment stent tube 1 is coated with a hydrophilic coating.

[0034] As an example, the wall of the ureteral stent tube 1 is coated with a hydrophilic coating, which makes the insertion of the ureteral stent tube 1 smoother for the doctor and avoids harm to the patient. Furthermore, indicator marks are provided on the wall of the ureteral stent tube 1 to help the doctor observe the length of the inserted ureteral stent tube 1, improving the accuracy and safety of the operation.

[0035] In one embodiment, reference is made to Figure 2 The anti-slip support tube 2 is a rewinding tubular structure.

[0036] As an example, the anti-slip stent tube 2 has a retractable tubular structure. With this design, the anti-slip stent tube 2 can naturally retract according to the length of the patient's ureter, thus expanding the applicable range of the ureteral stent.

[0037] In one embodiment, reference is made to Figure 3 The anti-reflux membrane 3 includes a cylindrical portion 31 and a conical portion 32 extending from one end of the cylindrical portion 31, with the tip of the conical portion 32 located at the second end of the ureteral segment stent tube 1.

[0038] As an example, the anti-reflux membrane 3 includes a cylindrical portion 31 and a conical portion 32. The conical portion 32 is a component extending from one end of the cylindrical portion 31, and the tip of the conical portion 32 is located at the second end of the ureteral segment stent tube 1. With this configuration, the cylindrical portion 31 and the conical portion 32 cooperate to form a funnel shape, so that urine flowing out of the anti-reflux membrane 3 cannot flow into the anti-reflux membrane 3, preventing urine from flowing back into the ureteral renal pelvis along the ureteral segment stent tube 1 when the patient is holding urine or in an improper lying position. The anti-reflux membrane 3 is made of lightweight material and can float above the urine surface of the bladder, avoiding stimulation of the patient's bladder neck and eliminating urinary tract irritation symptoms such as urinary frequency, urgency, and pain.

[0039] In one embodiment, reference is made to Figure 1 , Figure 2 and Figure 3 The length of the ureteral stent tube 1 is 195-205mm, the rewinding length of the anti-slippage stent tube 2 is 99-101mm, and the length of the anti-reflux membrane 3 is 19-21mm.

[0040] As an example, in the design, the length of the ureteral stent tube 1 is 195-205mm, the rewind length of the anti-slip stent tube 2 is 99-101mm, and the length of the anti-reflux membrane 3 is 19-21mm. This allows the ureteral stent to be designed in various sizes to suit different patients and improve the applicability of the equipment.

[0041] In one embodiment, reference is made to Figure 1 , Figure 4 , Figure 5 and Figure 6 The ureteral stent also includes a removal structure 7; the removal structure 7 passes through the anti-reflux membrane 3 and connects to the second end of the ureteral stent tube 1.

[0042] Currently, ureteral stents need to be removed or replaced periodically after placement. The usual procedure is to insert a cystoscope into the patient's bladder, then insert biopsy forceps into the instrument channel of the cystoscope and extend them into the bladder. The biopsy forceps are used to hold the ureteral stent, and then the cystoscope is removed to remove the ureteral stent. However, the procedure of removing ureteral stents with biopsy forceps and a cystoscope is complicated.

[0043] As an example, the ureteral stent also includes a removal structure 7; the removal structure 7 passes through the anti-reflux membrane 3 and is connected to the second end of the ureteral stent tube 1. When removing or periodically replacing the ureteral stent, the other components of the ureteral stent can be slowly pulled out by gently pulling the removal structure 7, which simplifies the tube removal operation and avoids causing harm to the patient.

[0044] In one embodiment, reference is made to Figure 1 The dismantling structure 7 includes a pull rope 71; one end of the pull rope 71 passes through the anti-reflux membrane 3 and is connected to the second end of the ureteral segment stent tube 1.

[0045] As an example, the first structure of the removal structure 7, namely the first structure of the ureteral stent, is introduced. The removal structure 7 includes a pull rope 71. One end of the pull rope 71 passes through the anti-reflux membrane 3 and connects to the second end of the ureteral stent tube 1. With this configuration, during the tube removal operation, the pull rope 71 is slowly pulled out, and the other components of the ureteral stent are also slowly pulled out, simplifying the tube removal operation and avoiding harm to the patient. The other end of the pull rope 71 is equipped with an adhesive piece, allowing the pull rope 71 to be adhered to the patient's vulvar skin to prevent the pull rope 71 from shaking due to patient movement, thus preventing injury to the patient.

[0046] In one embodiment, reference is made to Figure 4 and Figure 5 The dismantling structure 7 includes a connecting tube 72, a buoyancy balloon 73, an inflation tube 74, and a one-way inflation valve 75; the first end of the connecting tube 72 passes through the anti-reflux membrane 3 and is connected to the second end of the ureteral segment stent tube 1; the first end of the buoyancy balloon 73 is connected to the second end of the connecting tube 72, the second end of the buoyancy balloon 73 is connected to the first end of the inflation tube 74, the buoyancy balloon 73 is provided with an air inlet 76 that communicates with the inflation tube 74, and the second end of the inflation tube 74 is provided with a one-way inflation valve 75.

[0047] As an example, a second structure of the removal structure 7 is introduced, namely a second structure of the ureteral stent. The removal structure 7 includes a connecting tube 72, a buoyancy balloon 73, an inflation tube 74, and a one-way inflation valve 75. During installation, the first end of the connecting tube 72 is passed through the anti-reflux membrane 3 and connected to the second end of the ureteral stent tube 1. During the tube removal operation, the connecting tube 72 is slowly pulled out, and the other components of the ureteral stent are also slowly pulled out, which simplifies the tube removal operation and avoids causing harm to the patient. The first end of the buoyancy balloon 73 is connected to the second end of the connecting tube 72, and the second end of the buoyancy balloon 73 is connected to the first end of the inflation tube 74. Specifically, the buoyancy balloon 73 is a spherical structure, placed in the patient's bladder, below the anti-reflux membrane 3. After inflation, the buoyancy balloon 73 can float above the urine surface to limit the ureteral stent and prevent it from being pulled out of the renal pelvis. The buoyancy balloon 73 has an air inlet 76 connected to the inflation tube 74, and the second end of the inflation tube 74 has a one-way inflation valve 75. The one-way inflation valve 75 is a one-way inflation structure connected to the inflation tube 74. This setup allows for... The buoyancy balloon 73 is inflated through the one-way inflation valve 75 and inflation tube 74, allowing it to float above the urine surface. This eliminates the problem of the ureteral stent slipping out of the renal pelvis due to the weight of the inflation tube 74 and the one-way inflation valve 75. When the ureteral stent needs to be removed, simply cut the inflation tube 74, and the gas in the buoyancy balloon 73 will naturally be released. This allows the inflation tube 74 to be slowly pulled, and the buoyancy balloon 73, connecting tube 72, ureteral stent tube 1, anti-slip stent tube 2, anti-reflux membrane 3, and positioning ball 4 will also be slowly pulled out of the body, simplifying the removal procedure and avoiding harm to the patient. The inflation tube 74 and the one-way inflation valve 75 are both made of silicone, which is flexible and avoids causing harm to the patient. The one-way inflation valve 75 has a diameter of 3Fr and can be attached to the patient's vulvar skin to prevent the one-way inflation valve 75 from shaking due to the patient's movement, thus preventing harm to the patient.

[0048] In one embodiment, the connection between the first end of the buoyancy balloon 73 and the second end of the connecting tube 72 is a closed design.

[0049] As an example, the connection between the first end of the buoyancy balloon 73 and the second end of the connecting tube 72 is a closed design. This design ensures that the buoyancy balloon 73 can inflate and float above the urine surface, eliminating the problem of the ureteral stent slipping out of the renal pelvis due to the weight of the inflation tube 74 and the one-way inflation valve 75. It also prevents gas from entering the anti-reflux membrane 3, the ureteral segment stent tube 1, and the anti-slip stent tube 2, thus affecting the drainage of urine.

[0050] In one embodiment, reference is made to Figure 6The removal structure 7 also includes an inflation injector 77, which is mounted on a one-way inflation valve 75 and is used to inflate the buoyancy balloon 73 through an inflation tube 74.

[0051] As an example, the dismantling structure 7 also includes an inflation injector 77, which is a dedicated inflation injector used to supply air to the buoyancy balloon 73, with a specification of 30 mL. During installation, the inflation syringe 77 is installed on the one-way inflation valve 75 to inflate the buoyancy balloon 73 through the inflation tube 74. With this setup, the buoyancy balloon 73 is placed inside the patient's bladder. The inflation syringe 77 is used to inflate the buoyancy balloon 73 through the one-way inflation valve 75 and the inflation tube 74, causing the buoyancy balloon 73 to float above the urine surface. This eliminates the problem of the ureteral stent slipping out of the renal pelvis due to the weight of the inflation tube 74 and the one-way inflation valve 75. When it is necessary to remove the ureteral stent, simply cut the inflation tube 74. The gas in the buoyancy balloon 73 will naturally be expelled. This allows the inflation tube 74 to be slowly pulled out, and the buoyancy balloon 73, connecting tube 72, ureteral segment stent tube 1, anti-slip stent tube 2, anti-reflux membrane 3, and positioning ball 4 will also be slowly pulled out of the body. This simplifies the removal procedure and avoids harm to the patient.

[0052] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included within the protection scope of the present invention.

Claims

1. A ureteral stent, characterized in that, This includes ureteral segment stents, anti-slip stents, anti-reflux membranes, and positioning balls; The ureteral stent tube has a first drainage hole on its wall; The anti-slippage stent tube is disposed at the first end of the ureteral segment stent tube, and the anti-slippage stent tube is provided with a second drainage hole; The anti-reflux membrane is disposed at the second end of the ureteral stent tube, and the positioning ball is disposed on the part of the ureteral stent tube near the anti-reflux membrane to limit the anti-reflux membrane.

2. The ureteral stent according to claim 1, characterized in that, The ureteral stent tube has a hydrophilic coating on its wall.

3. The ureteral stent according to claim 1, characterized in that, The anti-slip support tube is a rewind-type tubular structure.

4. The ureteral stent according to claim 1, characterized in that, The anti-reflux membrane includes a cylindrical portion and a conical portion extending from one end of the cylindrical portion, the tip of which is located at the second end of the ureteral segment stent tube.

5. The ureteral stent according to claim 3, characterized in that, The length of the ureteral segment stent tube is 195-205mm, the rewinding length of the anti-slippage stent tube is 99-101mm, and the length of the anti-reflux membrane is 19-21mm.

6. The ureteral stent according to claim 1, characterized in that, The ureteral stent also includes a dismantling structure; the dismantling structure passes through the anti-reflux membrane and connects to the second end of the ureteral stent tube.

7. The ureteral stent according to claim 6, characterized in that, The dismantling structure includes a pull rope; one end of the pull rope passes through the anti-reflux membrane and is connected to the second end of the ureteral segment stent tube.

8. The ureteral stent according to claim 6, characterized in that, The dismantling structure includes a connecting pipe, a buoyancy balloon, an inflation pipe, and a one-way inflation valve; The first end of the connecting tube passes through the anti-reflux membrane and connects to the second end of the ureteral segment stent tube; The first end of the buoyancy balloon is connected to the second end of the connecting tube, the second end of the buoyancy balloon is connected to the first end of the inflation tube, the buoyancy balloon is provided with an air inlet communicating with the inflation tube, and the second end of the inflation tube is provided with the one-way inflation valve.

9. The ureteral stent according to claim 8, characterized in that, The connection between the first end of the buoyancy balloon and the second end of the connecting tube is a closed design.

10. The ureteral stent according to claim 8, characterized in that, The dismantling structure also includes an inflation syringe, which is installed on the one-way inflation valve and is used to inflate the buoyancy balloon through the inflation tube.

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