Ureteral stent with adjustable interval hardness

Abstract

The utility model provides a ureteral stent with adjustable interval hardness, which comprises a ureteral stent tube made of flexible materials and provided with a liquid inlet end and a liquid outlet end; the supporting pipe fitting is arranged on the periphery of the ureteral stent pipe in a sleeving mode, and the hardness of the supporting pipe fitting is larger than that of the ureteral stent pipe; the pull wire is made of a flexible material and is of a U-shaped structure, the pull wire is provided with a first pull part, a second pull part and a connecting part, the connecting part is arranged between the first pull part and the second pull part, and the end, close to the liquid inlet end, of the connecting part abuts against the supporting pipe fitting; the first pulling part and the second pulling part are both located at the liquid outlet end. According to the ureteral stent with the adjustable interval hardness, the interval hardness of the ureteral stent is adjustable, the ureteral stent is convenient to install, and discomfort of a patient is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of ureteral stents, and in particular relates to a ureteral stent with adjustable interval hardness. Background Art

[0002] Ureteral stents are also called double pigtail catheters or DJ tubes because of their curled ends. They are one of the most commonly used instruments by urologists. Ureteral stents are usually left in the patient's body for several weeks or even months. They are used to pass through the human ureter, with one end located in the human renal pelvis and the other end in the human bladder to support and drain the human ureter.

[0003] Currently, in order to reduce stimulation to the ureter and bladder, the ureteral stent is made of a soft material when it is placed in the ureter, which makes the stent body prone to wrinkling and bending when it is placed in the patient's body, which not only makes installation inconvenient but also reduces comfort.

[0004] Therefore, how to provide a ureteral stent with adjustable hardness intervals so that the hardness intervals of the ureteral stent can be adjusted to facilitate installation and reduce patient discomfort is a technical problem that technical personnel in this field urgently need to solve. Utility Model Content

[0005] The technical problem to be solved by the utility model is that the ureteral stent in the prior art is soft in material, inconvenient to install, and has reduced comfort when it is placed in the ureter.

[0006] In order to solve the above technical problems, the utility model provides a ureteral stent with adjustable interval hardness, including: a ureteral stent tube, which is made of a flexible material and has a liquid inlet end and a liquid outlet end; a supporting pipe fitting, which is sleeved on the periphery of the ureteral stent tube, and the hardness of the supporting pipe fitting is greater than the hardness of the ureteral stent tube; a wire drawing, which is made of a flexible material and has a U-shaped structure, and has a first pulling portion, a second pulling portion and a connecting portion, and the connecting portion is arranged between the first pulling portion and the second pulling portion, and one end of the connecting portion close to the liquid inlet end is against the supporting pipe fitting, and the first pulling portion and the second pulling portion are both located at the liquid outlet end.

[0007] As a further technical solution of the utility model, there are several supporting tubes, and the several supporting tubes are arranged adjacent to each other along the length direction of the ureteral stent tube. There is one drawing wire, and the connecting portion of one drawing wire abuts against one of the supporting tubes among the several supporting tubes.

[0008] As a further technical solution of the utility model, the number of the supporting tubes and the drawing wires are both several, and the several supporting tubes are arranged adjacent to each other along the length direction of the ureteral stent tube, and the connecting portion of one of the drawing wires abuts against a corresponding one of the supporting tubes.

[0009] As a further technical solution of the utility model, the supporting tube comprises: a first supporting tube, which is sleeved on the periphery of the ureteral stent tube; a drawing slot, which is opened on the side wall of the first supporting tube along the length direction of the first supporting tube, and one end of the connecting portion close to the liquid inlet end abuts against one end of the first supporting tube close to the liquid inlet end, and the first pulling portion passes through the drawing slot and is located at the liquid outlet end.

[0010] As a further technical solution of the utility model, the supporting tube comprises: a second supporting tube, which is sleeved on the periphery of the ureteral stent tube; a protrusion, which is fixed to the outer side wall of the second supporting tube, and a drawing groove is provided on a side of the protrusion close to the liquid inlet end, and an end of the connecting part close to the liquid inlet end is located in the drawing groove and abuts against the drawing groove.

[0011] As a further technical solution of the utility model, the diameter of the notch of the wire drawing groove is smaller than the diameter of the wire drawing.

[0012] As a further technical solution of the utility model, it also includes: a backflow prevention component, and the backflow prevention component is fixed on the liquid outlet end.

[0013] As a further technical solution of the utility model, the anti-reflux component includes: an anti-reflux port, the anti-reflux port is made of a flexible material, one end of the anti-reflux port is fixed to the liquid outlet end and connected to the liquid outlet end, and the other end of the anti-reflux port is open.

[0014] As a further technical solution of the utility model, both ends of the ureteral stent tube are curved structures.

[0015] As a further technical solution of the utility model, a plurality of through holes are provided at intervals on the side wall of the ureteral stent tube.

[0016] Beneficial effects:

[0017] The utility model provides a ureteral stent with adjustable hardness, comprising a ureteral stent tube, a supporting tube and a drawing wire. The supporting tube is sleeved on the periphery of the ureteral stent tube. The hardness of the supporting tube is greater than that of the ureteral stent tube. The ureteral stent tube made of a flexible material is supported by the supporting tube, so as to improve the hardness of the ureteral stent tube, facilitate the installation of the ureteral stent tube in the ureter, and reduce the discomfort of the patient. The drawing wire with a U-shaped structure is made of a flexible material. The connecting part of the drawing wire is arranged between a first pulling part and a second pulling part. One end of the connecting part close to the liquid inlet end is against the supporting tube. In clinical use, the utility model is After the ureteral stent is installed and fixed in the patient's ureter, the first pulling part and the second pulling part located at the liquid outlet end can be pulled from the liquid inlet end to the liquid outlet end. At this time, the connection part of the wire drawing is against the support pipe, so that the connection part drives the support pipe from the liquid inlet end to the liquid outlet end along the ureteral stent tube under the pulling action of the first pulling part and the second pulling part. Then, the position of the support pipe on the ureteral stent tube can be adjusted according to actual use requirements, so that a certain section of the ureteral stent tube has a certain hardness, that is, the section hardness of the ureteral stent is adjustable, and the ureteral stent meets the hardness requirements of different parts. In addition, after the position of the support pipe on the ureteral stent tube is adjusted, the first pulling part or the second pulling part can be pulled from the liquid inlet end to the liquid outlet end, so that the wire drawing is moved along the liquid inlet end to the liquid outlet end, and then the wire drawing is taken out to avoid the wire drawing being left in the ureter and causing tangling and other discomfort to the patient.

[0018] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of this specification or the technical solutions in the prior art, the drawings required for use in the embodiments 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 1 A schematic diagram of the structure of a ureteral stent provided in an embodiment of the utility model;

[0021] Figure 2 A schematic diagram of the structure of a first support tube provided in an embodiment of the utility model;

[0022] Figure 3A cross-sectional view of a first support tube provided in an embodiment of the utility model;

[0023] Figure 4 Another structural schematic diagram of a ureteral stent provided in an embodiment of the utility model;

[0024] Figure 5 A schematic diagram of the structure of a second support tube provided in an embodiment of the utility model;

[0025] Figure 6 A schematic diagram of the structure of the second support tube and wire drawing provided in an embodiment of the utility model.

[0026] Reference numerals:

[0027] 1. Ureteral stent tube; 11. Liquid inlet end; 12. Liquid outlet end;

[0028] 2. Support pipe; 21. First support pipe; 22. Drawing slot; 23. Second support pipe; 24. Bump; 25. Drawing groove;

[0029] 3. Wire drawing; 31. First pulling portion; 32. Second pulling portion; 33. Connecting portion;

[0030] 4. Anti-backflow parts;

[0031] 5. Through hole. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. 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 embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] Embodiment 1

[0034] See also Figure 1-6, the present embodiment 1 provides a ureteral stent with adjustable hardness, comprising a ureteral stent tube 1, a support tube 2 and a wire drawing 3, wherein the ureteral stent tube 1 is made of a flexible material, and the ureteral stent tube 1 has a liquid inlet end 11 and a liquid outlet end 12; the support tube 2 is sleeved on the periphery of the ureteral stent tube 1, and the hardness of the support tube 2 is greater than the hardness of the ureteral stent tube 1; the wire drawing 3 is made of a flexible material, and the wire drawing 3 is a U-shaped structure, and the wire drawing 3 has a first pulling portion 31, a second pulling portion 32 and a connecting portion 33, the connecting portion 33 is arranged between the first pulling portion 31 and the second pulling portion 32 and is integrally formed with the first pulling portion 31 and the second pulling portion 32, and one end of the connecting portion 33 close to the liquid inlet end 11 abuts against one end of the support tube 2 close to the liquid inlet end 11, and the first pulling portion 31 and the second pulling portion 32 are both located at the liquid outlet end 12.

[0035] Specifically, the utility model provides a ureteral stent with adjustable hardness interval, including a ureteral stent tube 1, a supporting tube 2 and a drawing 3, the supporting tube 2 is sleeved on the periphery of the ureteral stent tube 1, the hardness of the supporting tube 2 is greater than the hardness of the ureteral stent tube 1, so that the ureteral stent tube 1 made of flexible material is supported by the supporting tube 2, the hardness of the ureteral stent tube 1 is improved, and the ureteral stent tube 1 is installed in the ureter conveniently, reducing patient discomfort; the drawing 3 with a U-shaped structure is made of flexible material, the connecting portion 33 of the drawing 3 is arranged between the first pulling portion 31 and the second pulling portion 32, and the end of the connecting portion 33 close to the liquid inlet end 11 is against the supporting tube 2. During clinical use, the utility model After the ureteral stent is installed and fixed in the patient's ureter, the first pulling portion 31 and the second pulling portion 32 located at the liquid outlet end 12 can be pulled from the liquid inlet end 11 to the liquid outlet end 12. At this time, the connecting portion 33 of the wire drawing 3 is against the supporting tube 2, so that the connecting portion 33 drives the supporting tube 2 to move along the ureteral stent tube 1 from the liquid inlet end 11 to the liquid outlet end 12 under the pulling action of the first pulling portion 31 and the second pulling portion 32, and then the position of the supporting tube 2 on the ureteral stent tube 1 can be adjusted according to actual use requirements, so that a certain area of ​​the ureteral stent tube 1 has a certain hardness, that is, the area hardness of the ureteral stent is adjustable, so as to meet the hardness requirements of different parts of the ureteral stent. In addition, after the position of the support tube 2 on the ureteral stent tube 1 is adjusted, the first pulling portion 31 or the second pulling portion 32 can be pulled from the liquid inlet end 11 to the liquid outlet end 12, so that the wire drawing 3 is pulled to move along the liquid inlet end 11 to the liquid outlet end 12, and then the wire drawing 3 is removed to avoid the wire drawing 3 being left in the ureter and getting tangled, etc., causing discomfort to the patient. Before pulling the support tube 2, the support tube 2 can be installed on the ureteral stent tube 1 near the liquid inlet end 11, so as to adjust the support tube 2 to a suitable position along the liquid inlet end 11 to the liquid outlet end 12.

[0036] In some possible embodiments, the number of the support tubes 2 is several, and the several support tubes 2 are arranged adjacent to each other along the length direction of the ureteral stent tube 1. The number of the wire drawing 3 is one, and the connecting portion 33 of one wire drawing 3 abuts against one of the support tubes 2 among the several support tubes 2.

[0037] Those skilled in the art can understand that several support tubes 2 are arranged adjacent to each other along the length direction of the ureteral stent tube 1, and the connecting portion 33 of a wire drawing 3 abuts against one of the support tubes 2 among the several support tubes 2. By combining several support tubes 2, the length of the support tube 2 can be increased, thereby adjusting the length of the hardness range of the ureteral stent tube 1; and the wire drawing 3 can also be arbitrarily combined with one of the several support tubes 2. For example, when the wire drawing 3 abuts against a support tube 2 near the liquid inlet end 11 among the several support tubes 2, its position can be adjusted by the wire drawing 3, and when a support tube 2 near the liquid inlet end 11 is pulled to abut against other support tubes 2, the other support tubes 2 can be driven to move synchronously to meet the hardness requirements of different ureteral stent tubes 1.

[0038] In some possible embodiments, the number of the support tubes 2 and the number of the wiredrawings 3 are both multiple, and the multiple support tubes 2 are adjacently arranged along the length direction of the ureteral stent tube 1, and the connecting portion 33 of one of the wiredrawings 3 abuts against a corresponding one of the support tubes 2.

[0039] Those skilled in the art can understand that a plurality of support tubes 2 are arranged adjacent to each other along the length direction of the ureteral stent tube 1, and a connecting portion 33 of a drawing wire 3 abuts against a corresponding support tube 2, and the position of a corresponding support tube 2 can be adjusted by pulling a drawing wire 3, and the position of each support tube 2 can be adjusted along the direction from the liquid inlet end 11 to the liquid outlet end 12.

[0040] In some possible embodiments, the support tube 2 includes: a first support tube 21, which is sleeved on the periphery of the ureteral stent tube 1; a wire drawing slot 22, which is opened on the side wall of the first support tube 21 along the length direction of the first support tube 21, and the end of the connecting portion 33 close to the liquid inlet end 11 is against the end of the first support tube 21 close to the liquid inlet end 11, and the first pulling portion 31 passes through the wire drawing slot 22 and is located at the liquid outlet end 12.

[0041] This is because the wire drawing slot 22 is opened on the side wall of the first support tube 21 along the length direction of the first support tube 21, the end of the connecting portion 33 close to the liquid inlet end 11 is against the end of the first support tube 21 close to the liquid inlet end 11, and the first pulling portion 31 passes through the wire drawing slot 22 and is located at the liquid outlet end 12. The wire drawing slot 22 can be used to limit part of the stroke of the wire drawing 3. When the first pulling portion 31 and the second pulling portion 32 located at the liquid outlet end 12 are pulled from the liquid inlet end 11 to the liquid outlet end 12, the connecting portion 33 and the first support The tube 21 is abutted against each other at a position close to the wire drawing slot 22, thereby driving the first support tube 21 to move along the ureteral stent tube 1 from the liquid inlet end 11 to the liquid outlet end 12; after adjusting the position of the first support tube 21 on the ureteral stent tube 1, the first pulling portion 31 can be pulled from the liquid inlet end 11 to the liquid outlet end 12, so that the wire drawing 3 moves in the wire drawing slot 22, and then the connecting portion 33 and the second pulling portion 32 pass through and detach from the wire drawing slot 22 in sequence, and are taken out from the liquid outlet end 12, thereby taking out the wire drawing 3.

[0042] In some possible embodiments, the support tube 2 includes: a second support tube 23, which is sleeved on the periphery of the ureteral stent tube 1; a protrusion 24, which is fixed on the outer wall of the second support tube 23, and a drawing groove 25 is provided on a side of the protrusion 24 close to the liquid inlet end 11, and an end of the connecting portion 33 close to the liquid inlet end 11 is located in the drawing groove 25 and abuts against the drawing groove 25, and the internal size of the drawing groove 25 is larger than the diameter of the drawing 3.

[0043] This is because the protrusion 24 is fixed to the outer wall of the second support tube 23, and a drawing groove 25 is provided on one side of the protrusion 24 close to the liquid inlet end 11, and the end of the connecting portion 33 close to the liquid inlet end 11 is located in the drawing groove 25 and abuts against the drawing groove 25. The connecting portion 33 can be connected to the protrusion 24 through the drawing groove 25, so that the connecting portion 33 is connected to the second support tube 23. When the first pulling portion 31 and the second pulling portion 32 located at the liquid outlet end 12 are pulled from the liquid inlet end 11 to the liquid outlet end 12, the connecting portion 33 located at the drawing groove 25 is pulled. The connecting portion 33 in the groove 25 abuts against the protrusion 24, thereby driving the second support tube 23 to move along the ureteral stent tube 1 from the liquid inlet end 11 to the liquid outlet end 12; after adjusting the position of the second support tube 23 on the ureteral stent tube 1, the first pulling portion 31 can be pulled from the liquid inlet end 11 to the liquid outlet end 12, so that the drawing wire 3 moves in the drawing groove 25, and then the connecting portion 33 and the second pulling portion 32 pass through and separate from the drawing groove 25 in sequence, and are taken out from the liquid outlet end 12, and then the drawing wire 3 is taken out.

[0044] During clinical use, after the ureteral stent of the present application is installed and fixed in the patient's ureter, the first pulling portion 31 and the second pulling portion 32 located at the liquid outlet end 12 can be pulled from the liquid inlet end 11 to the liquid outlet end 12. At this time, the connecting portion 33 of the wire drawing 3 is against the supporting tube 2, so that the connecting portion 33 drives the supporting tube 2 to move along the ureteral stent tube 1 from the liquid inlet end 11 to the liquid outlet end 12 under the pulling action of the first pulling portion 31 and the second pulling portion 32, and then the position of the supporting tube 2 in the ureteral stent tube 1 can be adjusted according to actual use requirements, so that a certain interval of the ureteral stent tube 1 has a certain hardness, that is, the interval hardness of the ureteral stent is adjustable, so as to meet the hardness requirements of different parts of the ureteral stent. In addition, after adjusting the position of the supporting tube 2 on the ureteral stent tube 1, the first pulling portion 31 or the second pulling portion 32 can be pulled from the liquid inlet end 11 to the liquid outlet end 12, so that the wire drawing 3 can be moved along the liquid inlet end 11 to the liquid outlet end 12, and then the wire drawing 3 can be taken out to avoid the wire drawing 3 being left in the ureter and getting tangled, causing discomfort to the patient.

[0045] In some possible implementations, the diameter of the notch of the wire drawing groove 25 is smaller than the diameter of the wire drawing 3 .

[0046] Those skilled in the art will appreciate that the diameter of the notch of the wire drawing groove 25 is smaller than the diameter of the wire drawing 3 , which can prevent the wire drawing 3 from falling off from the notch of the wire drawing groove 25 , thereby making it impossible to pull the second support tube 23 by pulling the wire drawing 3 .

[0047] In some possible implementations, the further included is a backflow prevention member 4 , wherein the backflow prevention member 4 is fixed to the liquid outlet 12 .

[0048] Those skilled in the art can understand that, after the ureteral stent is installed and fixed in the patient's ureter, the liquid inlet end 11 of the ureteral stent tube 1 is located at the patient's renal pelvis, and the liquid outlet end 12 is located at the patient's bladder. When urine accumulates in the bladder, the anti-reflux component 4 fixed at the liquid outlet end 12 can prevent urine from flowing back from the liquid outlet end 12 into the ureteral stent tube 1.

[0049] In some possible embodiments, the anti-reflux component 4 includes: an anti-reflux port, which is made of a flexible material, one end of which is fixed to the liquid outlet 12 and connected to the liquid outlet 12, and the other end of which is open.

[0050] This is because one end of the anti-reflux port is fixed to and communicated with the liquid outlet end 12, and the other end of the anti-reflux port is open. When urine accumulates in the bladder, the pressure in the bladder is greater than the pressure in the renal pelvis, and the open end of the anti-reflux port made of flexible material closes under the pressure of urine, thereby preventing urine reflux.

[0051] In some possible implementations, both ends of the ureteral stent tube 1 are curved structures.

[0052] Those skilled in the art can understand that the two ends of the ureteral stent tube 1 are in a curved structure, which can prevent the ureteral stent tube 1 from falling off from the ureter.

[0053] In some possible implementations, a plurality of through holes 5 are spaced apart on the side wall of the ureteral stent tube 1 .

[0054] Those skilled in the art will appreciate that the plurality of through holes 5 spaced apart on the side wall of the ureteral stent tube 1 can increase the outflow of urine and prevent accumulation and blockage of stone debris.

[0055] Finally, it should be noted that the above embodiments are only specific implementation methods of the utility model, which are used to illustrate the technical solution of the utility model, rather than to limit it. The protection scope of the utility model is not limited thereto. Although the utility model is described in detail with reference to the above embodiments, ordinary technicians in this field should understand that any technician familiar with the technical field can still modify the technical solution recorded in the above embodiments within the technical scope disclosed by the utility model, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiment of the utility model. They should all be included in the protection scope of the utility model. Therefore, the protection scope of the utility model shall be based on the protection scope of the claims.

[0056] Although the implementation scheme of the utility model has been disclosed as above, it is not limited to the applications listed in the specification and implementation modes. It can be fully applied to various fields suitable for the utility model. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A ureteral stent with adjustable hardness, characterized in that: include: A ureteral stent tube, wherein the ureteral stent tube is made of a flexible material and has a liquid inlet end and a liquid outlet end; A supporting pipe, wherein the supporting pipe is sleeved on the periphery of the ureteral stent tube, and the hardness of the supporting pipe is greater than the hardness of the ureteral stent tube; The wire drawing is made of a flexible material and has a U-shaped structure. The wire drawing has a first pulling portion, a second pulling portion and a connecting portion. The connecting portion is arranged between the first pulling portion and the second pulling portion. One end of the connecting portion close to the liquid inlet end is against the supporting pipe. The first pulling portion and the second pulling portion are both located at the liquid outlet end.

2. The ureteral stent according to claim 1, characterized in that: There are several supporting tubes, which are arranged adjacent to each other along the length direction of the ureteral stent tube. There is one drawing wire, and the connecting portion of one drawing wire abuts against one of the supporting tubes among the several supporting tubes.

3. The ureteral stent according to claim 1, characterized in that: The number of the supporting tubes and the drawing wires are both several, and the several supporting tubes are arranged adjacent to each other along the length direction of the ureteral stent tube, and the connecting portion of one of the drawing wires abuts against a corresponding one of the supporting tubes.

4. The ureteral stent according to claim 3, characterized in that: The supporting pipe comprises: A first support tube, wherein the first support tube is sleeved on the periphery of the ureteral stent tube; A wire drawing slot is provided on the side wall of the first support tube along the length direction of the first support tube, one end of the connecting portion close to the liquid inlet end abuts against one end of the first support tube close to the liquid inlet end, and the first pulling portion passes through the wire drawing slot and is located at the liquid outlet end.

5. The ureteral stent according to claim 3, characterized in that: The supporting pipe comprises: A second supporting tube, wherein the second supporting tube is sleeved on the periphery of the ureteral stent tube; A protrusion is fixed on the outer wall of the second support tube, a side of the protrusion close to the liquid inlet end is provided with a drawing groove, and an end of the connecting part close to the liquid inlet end is located in the drawing groove and abuts against the drawing groove.

6. The ureteral stent according to claim 5, characterized in that: The diameter of the notch of the wire drawing groove is smaller than the diameter of the wire drawing.

7. The ureteral stent according to claim 6, characterized in that: Also includes: A backflow prevention member is fixed at the liquid outlet end.

8. The ureteral stent according to claim 7, characterized in that: The anti-backflow component comprises: The anti-reflux port is made of a flexible material, one end of the anti-reflux port is fixed to the liquid outlet and communicated with the liquid outlet, and the other end of the anti-reflux port is open.

9. The ureteral stent according to claim 8, characterized in that: Both ends of the ureteral stent tube are in a curved structure.

10. The ureteral stent according to claim 9, characterized in that: The side wall of the ureteral stent tube is provided with a plurality of through holes at intervals.

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