A ureteral stent

Abstract

The present invention provides a ureteral stent tube, which includes a first tube body, a second tube body placed in the ureter and communicated with the first tube body, and a bladder segment placed in the bladder and communicated with the second tube body; the first tube body is an elastic hose curled horizontally in an Archimedean spiral shape. The first tube body of the ureteral stent tube provided by the present invention, which is placed in the renal pelvis, is an elastic hose curled horizontally in an Archimedean spiral shape. The length of the entire ureteral stent tube placed in the human body can be adjusted by adjusting the number of turns of the curl of the first tube body, so that ureteral stent tubes of the same length can be suitable for patients with different ureteral lengths; moreover, the tape measure-shaped structure of the first tube body cooperates with the bladder segment placed in the bladder, which can greatly shorten the size of the bladder segment of the ureteral stent tube left in the bladder, and can greatly reduce the bladder irritation caused by the implantation of the ureteral stent tube.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to a ureteral stent tube. Background Art

[0002] A ureteral stent tube is a medical device used for patients with urinary tract obstruction caused by urethral stricture due to various diseases. The ureteral stent tube can be surgically placed between the renal pelvis and the bladder of the patient to support the ureter, and is used to guide the urine in the renal pelvis of the patient into the bladder. The ureteral stent tube has the functions of draining urine, dilating the ureteral stent tube, and preventing ureteral stenosis and adhesion.

[0003] Currently, the traditional ureteral stent tubes on the market generally have a curved section with a 360° bend at each end, and a slender straight tube section in the middle. The length of the traditional ureteral stent tube is fixed. When the ureteral stent tube is placed in the patient's body, the length of the ureteral stent tube placed in the renal pelvis is certain, and the remaining part of the ureteral stent tube will remain in the patient's bladder. For patients with a longer ureter, the length of the tube body placed in the bladder is smaller, and its tube body generally does not extend into the trigone area of the patient's bladder to cause irritation to the patient's bladder. For patients with a shorter ureter, the length of the tube body placed in the bladder is larger, and its tube body extends into the trigone area of the patient's bladder, which is very likely to cause irritation to the patient's bladder and lead to bladder irritation syndrome.

[0004] The existing Chinese patent publication number CN209899674U provides a ureteral stent tube for reducing bladder irritation syndrome. Its tube body structure includes a straight tube part, an elastic circular tube part arranged at one end of the straight tube part and located in the renal pelvis, and an elastic spiral tube part arranged at the other end of the straight tube part and located in the bladder. In this structure, the tube body at the end placed in the bladder is set as an elastic spiral structure, which will cause an increase in the length of the tube body of the ureteral stent tube placed in the patient's bladder. And this elastic spiral structure causes not only the tube body placed in the patient's bladder to easily touch the trigone area of the patient's bladder, but also a significant increase in the volume extended by the tube body in the bladder. Clinically speaking, it not only fails to play the role of reducing bladder irritation syndrome. Although the irritation of the ureteral stent tube to the bladder is changed from point irritation to surface irritation, the irritation to the bladder has not decreased, but increased. Therefore, the ureteral stent tube provided in the above technical solution cannot effectively reduce the bladder irritation syndrome of the patient after catheterization. Summary of the Invention

[0005] The object of the present invention is to solve the problem that after the existing ureteral stent tube is inserted, the redundant part of the tube body remains in the patient's bladder, causing irritation to the trigone of the bladder and resulting in the patient's bladder irritation symptoms, and the disadvantage that the elastic spiral structure in the existing structure does not reduce the patient's bladder irritation symptoms, and to provide a ureteral stent tube.

[0006] The technical solution adopted by the present invention to solve its technical problems is: a ureteral stent tube, including a first tube body, a second tube body placed in the ureter and communicating with the first tube body, and a bladder segment placed in the bladder and communicating with the second tube body; the first tube body is an elastic flexible tube curled horizontally in an Archimedean spiral shape, and a first opening for urine to enter is provided at the front end of the first tube body.

[0007] Further, it also includes an elastic transition piece arranged between the second tube body and the bladder segment and capable of fitting with the tube wall of the ureter.

[0008] Specifically, the elastic transition piece is integrally formed with the second tube body.

[0009] Specifically, the cross-sectional area at the connection of the elastic transition piece and the bladder segment is greater than or equal to one-third of the cross-sectional area of the second tube body.

[0010] Specifically, the length of the elastic transition piece is 1 cm - 1.5 cm.

[0011] Further, the length of the first tube body is 10 cm - 15 cm, and the length of the second tube body is 10 cm - 15 cm.

[0012] Further, the bladder segment is a third tube body bent relative to the second tube body, and a second opening is provided at the end of the third tube body.

[0013] Specifically, the length of the third tube body is 1 cm - 1.5 cm.

[0014] Specifically, the first tube body, the second tube body and the third tube body are integrally formed.

[0015] Further, the bladder segment is a U-shaped elastic clip arranged at the end of the second tube body.

[0016] The beneficial effects of a ureteral stent tube provided by the present invention are as follows: The first tube body disposed in the renal pelvis is an elastic hose curled horizontally in an Archimedean spiral shape. The length of the entire ureteral stent tube placed in the human body can be adjusted by adjusting the number of turns of the first tube body, so that ureteral stent tubes of the same length can be suitable for patients with different ureteral lengths. Moreover, the tape measure-shaped structure of the first tube body cooperates with the bladder section disposed in the bladder, which can greatly shorten the size of the bladder section of the ureteral stent tube remaining in the bladder, avoid the bladder section being too long and extending into the trigone area of the patient's bladder, and further can greatly reduce the bladder irritation caused by the implantation of the ureteral stent tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 FIG. 6 is a schematic perspective view of a ureteral stent tube provided by the first embodiment of the present invention;

[0018] Figure 2 FIG. 10 is a schematic perspective view of a ureteral stent tube provided by the second embodiment of the present invention;

[0019] Figure 3 is Figure 2 a partial enlarged view of A in FIG. 16;

[0020] Figure 4 FIG. 20 is a cross-sectional view of a ureteral stent tube provided by the second embodiment of the present invention;

[0021] Figure 5 FIG. 24 is a schematic perspective view of a ureteral stent tube provided by the third embodiment of the present invention.

[0022] In the figures: 100, 200, 300 - ureteral stent tubes, 11 - first tube body, 111 - first opening, 112, 121 - first through holes; 12 - second tube body, 13, 14 - third tube bodies, 131 - second opening, 132 - second through holes, 15 - U-shaped elastic clip, 151 - first connection end, 152 - second connection end, 20 - elastic transition piece, 21 - connection part of the elastic transition piece and the bladder section, L1 - length of the second tube body, L2 - length of the elastic transition piece, L3 - length of the third tube body, L4 - length of the second connection end, α - included angle formed between the second tube body and the third tube body. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present 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 only used to explain the present invention and are not used to limit the present invention.

[0024] See Figures 1-5, which is the ureteral stent tube 100 (200, 300) provided by the present invention. The ureteral stent tube 100 (200, 300) provided by the present invention can be used by patients with ureteral stenosis caused by various diseases. The ureteral stent tube 100 (200, 300) is placed into the patient's ureter through surgery to drain the urine in the renal pelvis into the bladder. The ureteral stent tube 100 (200, 300) can not only be used for forward urine drainage to avoid secondary damage caused by urine reflux, but also be used to dilate the patient's ureter.

[0025] Embodiment 1:

[0026] See Figure 1 , which is a ureteral stent tube 100 provided by the first embodiment of the present invention. As Figure 1 shown, the ureteral stent tube 100 includes a first tube body 11, a second tube body 12 placed in the ureter and communicating with the first tube body 11, and a bladder segment placed in the bladder and communicating with the second tube body 12. The entire ureteral stent tube 100 is divided into a three-section structure of the first tube body 11, the second tube body 12, and the bladder segment. The three sections are connected in sequence, so that the first tube body 11 and the bladder segment are respectively located at both ends of the second tube body 12 and are fixedly communicated with the second tube body 12.

[0027] Furthermore, as Figure 1 shown, the first tube body 11 in the ureteral stent tube 100 provided by the present invention is an elastic hose coiled horizontally in an Archimedean spiral shape. The first tube body 11 should be arranged in the renal pelvis of the patient to guide the urine in the renal pelvis into the ureteral stent tube 100 and drain it into the bladder through the guidance of the ureteral stent tube 100. The first tube body 11 in the ureteral stent tube 100 provided by the present invention is coiled horizontally in a tape measure shape and has a certain elasticity. Therefore, the number of coils and the coiled length of the first tube body 11 can be adjusted according to the actual needs of different patients. The length of the first tube body 11 in the ureteral stent tube 100 provided by the present invention is between 10 cm and 15 cm, that is, the length that the entire ureteral stent tube 100 can be adjusted in the patient's body is between 10 cm and 15 cm. The horizontal spiral coiled structure of the first tube body 11 can meet the requirements for different lengths of the ureteral stent tube 100. When the ureter of the patient is longer and the length of the second tube body 12 is not enough to meet the length of the patient's ureter, a part of the horizontal coiled section of the first tube body 11 can be unfolded, and the coiled tube body extends into the patient's ureter to supplement the insufficient length of the second tube body 12. When the length of the patient's ureter is equal to the length of the second tube body 12, the first tube body 11 can be arranged in the renal pelvis of the patient as a whole in a tape measure shape, so as to avoid the bladder segment of the ureteral stent tube 100 penetrating too deeply into the bladder and causing irritation to the bladder.

[0028] Specifically, as Figure 1 shown, a first opening 111 for urine to enter is provided at the front end of the first tube body 11, and the end of the first tube body 11 is fixedly communicated with the second tube body 12. When the first tube body 11 is placed into the renal pelvis of a patient, the urine generated in the renal pelvis can flow into the ureteral stent tube 100 through the first opening 111, and is diverted through the first tube body 11 into the second tube body 12 connected thereto. A plurality of first through holes 112 for urine to enter and exit are uniformly distributed on the tube wall of the first tube body 11. The multiple first through holes 112 provided on the tube wall of the first tube body 11 enable the urine generated in the renal pelvis to not only enter the first tube body 11 through the first opening 111, but also enter the first tube body 11 through the first through holes 112 provided on the tube wall of the first tube body 11, and is drained by the first tube body 11 into the second tube body 12 and finally discharged into the bladder.

[0029] Furthermore, as Figure 1 shown, in the ureteral stent tube 100 provided in the first embodiment of the present invention, the second tube body 12 connected to the end of the first tube body 11 is an elastic hose vertically arranged in the ureter of the patient. When the ureteral stent tube 100 is placed in the patient's body, the second tube body 12 is completely arranged in the ureter of the patient, and the end of the second tube body 12 is located at the ureteral orifice of the patient's bladder. It is precisely through the mutual clamping of the second tube body 13 and the bladder segment that the end of the ureteral stent tube 100 is fixed at the ureteral orifice of the patient's bladder.

[0030] Specifically, as Figure 1 shown, a plurality of first through holes 121 for urine to enter and exit are uniformly distributed on the tube wall of the second tube body 12 of the ureteral stent tube 100. The second tube body 12 is communicated with the first tube body 11, so that the urine flowing into the first tube body 11 from the renal pelvis can be drained by the second tube body 12 into the bladder. And the plurality of first through holes 121 provided on the second tube body 12 enable the urine directly flowing from the renal pelvis into the ureter to also enter the second tube body 12 through the first through holes 121 located on the second tube body 12, and is drained by the second tube body 12 into the bladder.

[0031] Furthermore, as Figure 1 shown, in the first embodiment of the present invention, the bladder segment is a third tube body 13 bent relative to the second tube body 12. A clamping portion is formed by the mutual bending between the bladder segment and the second tube body 12, and the ureteral stent tube 100 can be fixed on the ureteral orifice of the bladder through this clamping portion. When the first tube body 11 is curled in a tape measure-like structure in the renal pelvis, the renal pelvis forms an upward pulling force on the curled tube body, and through this pulling force, the third tube body 13 bent at the end of the second tube body 12 is hooked to the ureteral orifice of the patient's bladder, playing a role in fixing the end of the ureteral stent tube 100.

[0032] Specifically, the bladder segment of the ureteral stent tube 100 is a third tube body 13 that is bent relative to the second tube body 12. The first tube body 11, the second tube body 12, and the third tube body 13 in the ureteral stent tube 100 are integrally formed. Therefore, the third tube body 13 is an elastic hose made of the same material as the first tube body 11 and the second tube body 12. During the catheterization process of the ureteral stent tube 100, a guide wire can pass through the first tube body 11, the second tube body 12, and the third tube body 13. The third tube body 13 is configured as an elastic hose structure, which is more convenient for the catheterization of the guide wire. The bladder segment is the only segment of the entire ureteral stent tube 100 that is placed in the bladder. The smaller the length of the bladder segment, the less irritation to the bladder. Therefore, the third tube body 13 only needs to ensure that the end of the ureteral stent tube 100 can be fixed at the ureteral orifice of the bladder.

[0033] A second opening 131 is further provided at the end of the third tube body 13. The second opening 131 of the third tube body 13 is in communication with the first opening 111 of the first tube body 11, which is convenient for the insertion of the guide wire into the ureteral stent tube 100 during catheterization. And a plurality of second through holes 132 for urine drainage are provided on the third tube body 13. The setting of the second through holes 132 also facilitates the better and faster discharge of urine in the third tube body 13 from the third tube body 13. The three-section structure design of the ureteral stent tube 100 provided by the present invention, in which the tape-like structure of the first tube body 11 cooperates with the hook structure of the bladder segment, can greatly shorten the size of the bladder segment of the tube body 10 extending into the bladder, thereby reducing the irritation of the bladder segment to the patient's bladder.

[0034] Embodiment 2:

[0035] See Figures 2-4 , which is a schematic structural diagram of a ureteral stent tube 200 provided by the second embodiment of the present invention. The difference between the second embodiment and the first embodiment is that the ureteral stent tube 200 provided in the second embodiment of the present invention further includes an anti-reflux structure provided on the tube body. The entire ureteral stent tube 200 is placed inside the ureter of the patient. It can not only drain urine through the ureteral stent tube 200, but also achieve the forward guidance of urine through the anti-reflux structure.

[0036] Furthermore, as Figure 2 and Figure 3As shown, the ureteral stent tube 200 further includes an elastic transition piece 20 disposed between the second tube body 12 and the bladder section and capable of fitting against the wall of the ureter. The material of the elastic transition piece 20 is the same as that of the second tube body 12, both being a polymer material with certain elastic deformation. When the elastic transition piece 20 is placed in the patient's body, it is located at the ureteral orifice of the patient's bladder. When the bladder is in the urination state, the muscles on the bladder will contract and squeeze the ureter on the side of the bladder, causing the ureter to contract simultaneously. The elastic transition piece 20 in the ureter on the side of the bladder is simultaneously squeezed by the bladder and contracted by the ureter, resulting in elastic deformation, and then fitting against the wall of the patient's ureter, achieving the function of closing the ureteral stent tube 200 and preventing the urine in the bladder from flowing back to the renal pelvis through the ureteral stent tube 200.

[0037] In this embodiment, the elastic transition piece 20 and the second tube body 12 are integrally formed. The elastic transition piece 20 is a valve structure formed by an incision provided at the end of the second tube body 12. The incision can be a vertical incision extending from the side wall of the second tube body 12 all the way to the bladder section, or an inclined incision extending from the side wall of the second tube body 12 all the way to the bladder section. If the incision is a vertical incision, the cross-sectional area of the elastic transition piece 20 from the end of the second tube body 12 to the bladder section is consistent. If the incision is an inclined incision, the cross-sectional area of the elastic transition piece 20 from the end of the second tube body 12 to the bladder section gradually decreases.

[0038] In this embodiment, as Figure 4 shown, the incision at the end of the second tube body 20 is an inclined incision, and the cross-sectional area of the elastic transition piece 20 gradually decreases. The cross-sectional area at the connection 21 between the elastic transition piece 20 and the bladder section is the minimum cross-section of the elastic transition piece 20. The area of the minimum cross-section of the elastic transition piece 20 should be greater than or equal to one-third of the cross-sectional area of the second tube body 12, so as to ensure that the elastic transition piece 20 can completely close the second tube body 12 of the ureteral stent tube 200 when fitting against the wall of the patient's ureter, and avoid the urine in the bladder from flowing back into the ureter from the bladder.

[0039] As Figure 4As shown in the figure, the overall length of the ureteral stent tube 200 provided in the second embodiment of the present invention is between 25 cm and 32 cm. Among them, the length L1 of the second tube body 12 located in the ureter is 10 cm - 15 cm, and the length L3 of the third tube body 14 located in the bladder is between 1 cm and 1.5 cm. In this embodiment, the third tube body 14 is bent relative to the second tube body 12 to form an included angle α, and the included angle α < 90°, and α is an acute angle, so that a clamping portion is formed between the third tube body 14 and the second tube body 12, and the third tube body 14 in the bladder segment is fixed at the ureteral orifice of the patient's bladder through this clamping portion. In order to ensure that the elastic transition piece 20 can play an anti-reflux role at the end of the patient's ureter, the length L2 of the elastic transition piece 20 is 1 cm - 1.5 cm.

[0040] Embodiment Three:

[0041] As Figure 5 shown in the figure, a ureteral stent tube 300 provided in the third embodiment of the present invention is shown. The difference between the third embodiment of the present invention and the first embodiment is that an anti-reflux structure is provided on the ureteral stent tube 300, that is, an elastic transition piece 20 is provided at the end of the second tube body 12. And, the bladder segment on the ureteral stent tube 300 is a U-shaped elastic clip 15 provided at the end of the second tube body 12. A clamping portion is formed at the end of the second tube body 12 through the U-shaped elastic clip 15, and the bladder segment of the ureteral stent tube 300 is clamped at the ureteral orifice of the patient's bladder through this clamping portion.

[0042] The U-shaped elastic clip 15 is processed from a medical polymer material with a certain elasticity, and has two first connection ends 151 and second connection ends 152 arranged in parallel with each other. The first connection end 151 is fixedly connected to the elastic transition piece 20 at the end of the second tube body 12. The U-shaped elastic clip 15 is arranged on the patient's bladder, and the end of the second tube body 20 of the ureteral stent tube 300 is clamped at the ureteral orifice of the patient's bladder by using the first connection end 151 and the second connection end 152. Compared with the hook portion formed by the bending structure of the third tube body 13 in the first embodiment, the U-shaped elastic clip 15 is more stable and effective in fixing the end of the second tube body 12, and can ensure that the bladder segment of the ureteral stent tube 300 is effectively fixed while being placed in the patient's bladder as little as possible.

[0043] Specifically, the length L4 of the second connection end 152 of the U-shaped elastic clip 15 is 1 cm - 1.5 cm. The smaller the size of the U-shaped elastic clip 15 extending into the patient's bladder, the less irritation to the bladder, so as to avoid the irritation to the patient's bladder caused by the bladder segment extending into the trigone area of the patient's bladder.

[0044] In a ureteral stent tube 100 (200, 300) provided by the present invention, a first tube body 11 disposed in the renal pelvis is an elastic hose curled horizontally in an Archimedean spiral shape. The length of the entire ureteral stent tube 100 (200, 300) placed in the human body can be adjusted by adjusting the number of turns and the length of the curl of the first tube body 11. Ureteral stent tubes 100 (200, 300) with the same length can be applied to patients with different ureteral lengths to meet the urine drainage requirements from the renal pelvis to the bladder. When used for patients with a longer ureter, the first tube body 11 of the ureteral stent tube 200 (200, 300) can be fully unfolded to meet the urine drainage requirements between the renal pelvis and the bladder. When used for patients with a shorter ureter, a part of the front end of the first tube body 11 of the ureteral stent tube 200 (200, 300) can be kept in the original curled state in the renal pelvis of the patient, so as to avoid the overlong ureteral stent tube 200 (200, 300) extending into the patient's bladder and causing irritation to the trigone area of the patient's bladder, resulting in bladder irritation symptoms.

[0045] Moreover, the tape measure-shaped structure of the first tube body 11 in the ureteral stent tube 100 (200, 300) provided by the present invention cooperates with the bladder segment disposed in the bladder, which can greatly shorten the size of the bladder segment and avoid the overlong size of the bladder segment extending into the trigone area of the patient's bladder. Furthermore, it can greatly reduce the bladder irritation symptoms caused by the implantation of the ureteral stent tube 200.

[0046] Meanwhile, the ureteral stent tube 200 (300) provided by the present invention further includes an elastic transition piece 20 that can be attached to the ureteral wall. As an anti-reflux structure, the elastic transition piece 20 can effectively prevent the urine in the bladder from refluxing into the renal pelvis, causing secondary harm to the patient.

[0047] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A ureteral stent tube, characterized in that, it includes a first tube body, a second tube body placed in the ureter and communicating with the first tube body, and a bladder segment placed in the bladder and communicating with the second tube body; the first tube body is an elastic hose coiled horizontally in an Archimedean spiral shape, and a first opening for urine to enter is provided at the front end of the first tube body; the bladder segment is a third tube body bent relative to the second tube body; a clamping part is formed by bending between the bladder segment and the second tube body, and the ureteral stent tube is fixed on the ureteral orifice of the bladder through the clamping part; it further includes an elastic transition piece arranged between the second tube body and the bladder segment and capable of fitting with the wall of the ureter, and the cross-sectional area at the connection of the elastic transition piece and the bladder segment is greater than or equal to one-third of the cross-sectional area of the second tube body.

2. The ureteral stent tube according to claim 1, characterized in that, the elastic transition piece is integrally formed with the second tube body.

3. The ureteral stent tube according to claim 1, characterized in that, the length of the elastic transition piece is 1 cm - 1.5 cm.

4. The ureteral stent tube according to claim 1, characterized in that, the length of the first tube body is 10 cm - 15 cm, and the length of the second tube body is 10 cm - 15 cm.

5. The ureteral stent tube according to any one of claims 1 - 4, characterized in that, a second opening is provided at the end of the third tube body.

6. The ureteral stent tube according to claim 5, characterized in that, the length of the third tube body is 1 cm - 1.5 cm.

7. The ureteral stent tube according to claim 5, characterized in that, the first tube body, the second tube body and the third tube body are integrally formed.

8. The ureteral stent tube according to any one of claims 1 - 4, characterized in that, the bladder segment is a U-shaped elastic clip arranged at the end of the second tube body.

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