Ureteral stent
By designing a ureteral stent with a spiral structure, the problem that the ureteral stent in the prior art cannot effectively fight malignant stenosis is solved, the stable setting of the stent and urine drainage are achieved, and the patient's dysfunction is improved.
Patent Information
- Application Number
- CN202421398357.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-18
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-06-18
AI Technical Summary
The existing ureteral stent cannot effectively fight malignant stenosis when there is local ureteral lesions or obstruction, resulting in the stent losing its drainage effect and making it difficult for patients to urinate.
A ureteral stent including a first body, a second body and a third fixation section is designed, the first support section and/or the second support section having a helical structure through which reinforcement support is provided in the ureter, resisting malignant stenosis, and draining of urine is achieved through the inner ring of the helical structure.
This design realizes the stable setting of the ureteral stent in the body, enhances support for malignant stenosis areas, and improves the patient's dysfunction of urination.
Smart Images
Figure CN222899392U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of medical devices, in particular to a ureteral stent. Background Art
[0002] Ureteral stents are widely used in urological surgeries, such as in the pre-operative and post-operative indwelling for kidney stones, ureteral stones, hydronephrosis, kidney transplantation, ureteral stricture, etc., to play a role in support and drainage, so as to ensure that urine drains from the kidney to the bladder and solve the problem of urine accumulation caused by poor urinary tract patency in patients.
[0003] The existing ureteral stents have weak support strength. When local lesions or obstructions occur in the ureter, they cannot effectively resist malignant ureteral strictures, causing the ureteral stent to lose its drainage function and thus making it difficult for patients to urinate. Summary of the Utility Model
[0004] The technical problem to be solved by the embodiments of the utility model is to provide a ureteral stent to solve the problem in the prior art that when local lesions or obstructions occur in the ureter, it cannot effectively resist malignant ureteral strictures, causing the ureteral stent to lose its drainage function and thus resulting in difficult urination for patients.
[0005] The utility model discloses a ureteral stent, including: a first main body, a second main body, and a third fixing section. The first main body includes a connected first fixing section and a first support section; the second main body is located on one side of the first main body and is disposed opposite to the first main body. The second main body includes a connected second fixing section and a second support section; the third fixing section is disposed on the side of the first main body and the second main body away from the first fixing section, and the third fixing section is used to connect the first main body and the second main body; wherein, the first support section and / or the second support section includes a spiral structure.
[0006] Optionally, the spiral structure is a same-diameter structure, and the diameter of the spiral structure is 3 mm to 10 mm.
[0007] Optionally, the spiral structure is a variable-diameter structure.
[0008] Optionally, both the first support section and the second support section include a plurality of spiral structures, and the spiral structures of the first support section and the spiral structures of the second support section are arranged in one-to-one correspondence.
[0009] Optionally, the outer periphery of the third fixing section is an arc structure.
[0010] Optionally, the first fixing section and the second fixing section are in a curled structure.
[0011] Optionally, the first fixing section is located on a side of the first supporting section facing away from the second fixing section, and the second fixing section is located on a side of the second supporting section facing away from the first fixing section.
[0012] Optionally, the first main body, the second main body and the third fixing section are all hollow tubes, and a cutout is formed on a side of the third fixing section away from the first main body.
[0013] Optionally, a first through hole is formed on a side wall of the first body, and a second through hole is formed on a side wall of the second body.
[0014] Optionally, the width of the first fixing section and the second fixing section is 5 mm to 10 mm, and the width of the third fixing section is 8 mm to 10 mm.
[0015] Compared with the prior art, the beneficial effect of the ureteral stent provided by the embodiment of the utility model is that: the first fixing segment and the second fixing segment are placed in the patient's renal pelvis, the third fixing segment is placed in the patient's bladder, and the first supporting segment and the second supporting segment are located in the patient's ureter, thereby achieving a stable setting of the ureteral stent in the patient's body, so that the ureteral stent is not easy to shift or fall off after being placed. At the same time, the first supporting segment and / or the second supporting segment include a spiral structure, and the spiral structure has a large supporting strength. Under the interaction of the first supporting segment and the second supporting segment, the narrow area in the ureter is strengthened to support it, and the malignant narrow area is jointly fought against. At the same time, the urine in the renal pelvis flows into the bladder through the inner circle of the spiral structure, thereby improving or reducing the urination difficulty caused by the malignant narrowing of the patient's ureter. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] The technical solution of the utility model will be further described in detail below with reference to the accompanying drawings and embodiments, in which:
[0017] Figure 1 This is one of the overall schematic diagrams of a ureteral stent provided in one embodiment of the utility model;
[0018] Figure 2 This is the second overall schematic diagram of the ureteral stent provided by an embodiment of the utility model;
[0019] Figure 3 This is an overall schematic diagram of a ureteral stent provided by another embodiment of the utility model;
[0020] Figure 4 yes Figure 1 Application diagram of the provided ureteral stent.
[0021] The reference numerals in the figures are as follows: 10, the first main body; 110, the first fixing section; 101, the first through hole; 120, the first supporting section; 20, the second main body; 210, the second fixing section; 220, the second supporting section; 201, the second through hole; 30, the third fixing section; 301, the cut section; 40, the ureter; 410, the stenosis area; 100, the ureteral stent. Detailed implementation manners
[0022] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other. Now, with reference to the accompanying drawings, the preferred embodiments of the present invention will be described in detail.
[0023] An embodiment of the present invention provides a ureteral stent 100, as Figures 1 to 4 shown, which includes a first main body 10, a second main body 20, and a third fixing section 30. The first main body 10 includes a connected first fixing section 110 and a first supporting section 120; the second main body 20 is located on one side of the first main body 10, and the second main body 20 includes a connected second fixing section 210 and a second supporting section 220; the third fixing section 30 is disposed on the side of the first main body 10 and the second main body 20 away from the first fixing section 110, and the third fixing section 30 is used to connect the first main body 10 and the second main body 20; wherein, the first supporting section 120 and / or the second supporting section 220 includes a spiral structure.
[0024] During the use of the ureteral stent 100 in this embodiment, the first fixing section 110 and the second fixing section 210 are placed in the patient's renal pelvis, the third fixing section 30 is placed in the patient's bladder, and the first supporting section 120 and the second supporting section 220 are located in the patient's ureter 40, so as to realize the stable setting of the ureteral stent 100 in the patient's body, making the ureteral stent 100 not easy to shift and fall off after being implanted. At the same time, the first supporting section 120 and / or the second supporting section 220 includes a spiral structure, and the spiral structure has a relatively large supporting strength. Under the interaction of the first supporting section 120 and the second supporting section 220, it serves the purpose of strengthening the support for the stenosis area 410 in the ureter 40, jointly resisting the malignant stenosis area 410. At the same time, the urine in the renal pelvis flows through the inner ring of the spiral structure into the bladder, thereby improving or reducing the dysuria caused by the malignant stenosis of the patient's ureter 40.
[0025] Please refer to Figure 1, a structural example of a ureteral stent 100 is given. Both the first support segment 120 and the second support segment 220 include a spiral structure. When the ureteral stent 100 of this embodiment is placed in a patient's body, the spiral structures of the first support segment 120 and the second support segment 220 are arranged crosswise and staggered with each other, enhancing the overall support strength, playing a role in supporting and dilating the stenotic area 410, having a strong ability to resist malignant stenosis in the ureter 40. At the same time, the inner circles of the spiral structures of the first support segment 120 and the second support segment 220 jointly form a urine passage for the purpose of transporting urine.
[0026] Please refer to Figure 2 , another structural example of a ureteral stent 100 is given. The first support segment 120 is a straight structure, and the second support segment 220 includes a spiral structure. When the ureteral stent 100 of this embodiment is placed in a patient's body, the first support segment 120 and the second support segment 220 are arranged adjacent to each other to jointly resist malignant stenosis in the ureter 40. At the same time, the inner circle of the spiral structure of the second support segment 220 forms a urine passage for the purpose of transporting urine. When the local stenosis symptoms in the ureter 40 are relieved or the ureteral stent 100 needs to be replaced, the ureteral stent 100 of this embodiment is also convenient to remove. Specifically, first move the first fixing segment 110 out of the body, and then slowly remove the remaining part of the ureteral stent 100 to avoid damaging the mucosal tissue of the ureter 40 due to the spiral structure of the first support segment 120 getting stuck on the inner wall of the ureter 40.
[0027] As a preferred solution of this embodiment, the spiral structure is a same-diameter structure, and the diameter of the spiral structure is 3 mm to 10 mm.
[0028] The symptoms of different patients are different. During actual use, the first support segment 120 and the second support segment 220 with different structures are selected according to the structure of the stenotic area 410 in the patient's ureter 40. When the structure of the stenotic area 410 in the patient's ureter 40 is relatively regular, the spiral structure can be a same-diameter structure, and the purpose of resisting malignant stenosis can be achieved. Therefore, the diameter of the spiral structure can be adjusted within the range of 3 mm to 10 mm according to the actual situation inside the patient's ureter 40 to improve the applicability of the ureteral stent 100 of this embodiment. For example, the diameter of the spiral structure can be 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm or 10 mm.
[0029] As a preferred solution of this embodiment, the spiral structure is a variable-diameter structure.
[0030] During actual use, the first support section 120 and the second support section 220 with different structures are selected according to the structure of the stenosis area 410 in the patient's ureter 40. When the structure of the stenosis area 410 in the patient's ureter 40 presents an irregular shape, the spiral structure can be a variable-diameter structure so that the spiral structure corresponds to the irregular part of the stenosis area 410. Specifically, in the narrower part of the stenosis area 410, the part with a larger diameter of the spiral structure is made to correspond and match it, better playing a supporting role and improving the use effect of the ureteral stent 100.
[0031] As a preferred solution of this embodiment, both the first support section 120 and the second support section 220 include a plurality of spiral structures, and the spiral structures of the first support section 120 and the spiral structures of the second support section 220 are arranged in one-to-one correspondence.
[0032] During actual application, when there are multiple discontinuous malignant stenosis areas 410 in the patient's ureter 40, the number of spiral structures on the first support section 120 and the second support section 220 is set according to the number of the stenosis areas 410, and the support for the multiple stenosis areas 410 is achieved targeted. Under the interaction of the multiple spiral structures, the malignant stenosis areas 410 are resisted to drain the urine in the renal pelvis into the bladder, thereby expanding the applicable range of the ureteral stent 100 of this embodiment.
[0033] The spiral structures of the above-mentioned first support section 120 are arranged at intervals, and the interval between two adjacent spiral structures is 1-20 mm. The spiral structures of the second support section 220 are arranged at intervals, and the interval between two adjacent spiral structures is 1-20 mm. The length of the spiral structure matches the stenosis area 410 and is adaptively adjusted.
[0034] As a preferred solution of this embodiment, the outer periphery of the third fixing section 30 is an arc structure.
[0035] Among them, for the structural limitation of the third fixing section 30, the outer periphery is an arc structure. When the ureteral stent 100 is placed in the patient's body, the contact friction between the third fixing section 30 and the inner wall of the ureter 40 can be effectively reduced, the pain of the patient can be alleviated, and it is also convenient to place or remove the ureteral stent 100. The structural shape of the above-mentioned third fixing section 30 is not specifically limited and can be semi-circular, water-drop-shaped, etc.
[0036] As a preferred solution of this embodiment, referring to Figures 1 to 4 , the first fixing section 110 and the second fixing section 210 are in a curled structure.
[0037] Among them, while the curled structure can play a better supporting role, the curled structure is relatively gentle in contact with the patient when placed in the patient's body, reducing the discomfort of the patient during use.
[0038] As a preferred solution of this embodiment, refer to Figures 1 to 4 , the first fixing section 110 is located on the side of the first supporting section 120 away from the second fixing section 210, and the second fixing section 210 is located on the side of the second supporting section 220 away from the first fixing section 110.
[0039] Among them, the above-mentioned settings of the first fixing section 110 and the second fixing section 210 are evenly stressed in the patient's body, with good fixing effect, which can improve the stability of the ureteral stent 100 in the patient's body, prevent the ureteral stent 100 from shifting, and ensure the urine drainage effect.
[0040] As a preferred solution of this embodiment, refer to Figures 2 to 4 , the first main body 10, the second main body 20 and the third fixing section 30 are all made of hollow tubes, and a cut 301 is formed on the side of the third fixing section 30 away from the first main body 10.
[0041] Among them, while the ureteral stent 100 drains urine through the inner circle of the spiral structure, the first main body 10, the second main body 20 and the third fixing section 30 are all set as hollow tubes. Urine can also flow from one end of the hollow tube to the other end in the renal pelvis until it reaches the bladder, improving the drainage effect of the ureteral stent 100. The setting of the cut 301 improves the convenience of inserting or removing the ureteral stent 100 into or from the ureter 40. The guide wire is placed in the first main body 10 and the second main body 20 through the cut 301, and the ureteral stent 100 is inserted into or removed from the ureter 40 through the guide wire.
[0042] Refer to Figure 1 , the provided ureteral stent 100 is controlled by a guide wire to place the Figure 1 shown ureteral stent 100 in the ureter 40, and when removing, the ureteral stent 100 is pulled out as a whole through the guide wire.
[0043] Please refer to 2. The provided ureteral stent 100 is controlled by a guide wire to place the Figure 2 shown ureteral stent 100 in the ureter 40. When removing, the first main body 10 is removed first through the guide wire, and then the second main body 20 is slowly pulled out, avoiding damage to the inner wall of the ureter 40 and the mucosal tissue of the ureter 40 due to the spiral structure of the second supporting section 220 getting stuck. Here, the whole ureteral stent 100 can be made of elastic material.
[0044] As a preferred solution of this embodiment, a first through hole 101 is formed on the side wall of the first main body 10, and a second through hole 201 is formed on the side wall of the second main body 20.
[0045] Among them, the main functions of the first through-hole 101 and the second through-hole 201 are to drain urine. The purpose of the first through-hole 101 provided on the first fixing section 110 and the second through-hole 201 provided on the second fixing section 210 is to drain the urine in the renal pelvis. The first through-hole 101 provided on the first supporting section 120 and the second through-hole 201 provided on the second supporting section 220 are conducive to the drainage of urine between the inner wall of the narrow area 410 of the ureter 40 and the gap of the ureteral stent 100.
[0046] The quantity and size of the above-mentioned first through-hole 101 and second through-hole 201 can be adjusted according to the actual application scenario of the ureteral stent 100, and are not limited herein.
[0047] In this embodiment, there is no specific limitation on the material of the ureteral stent 100. The ureteral stent 100 can be an integrally formed structure, which ensures the use stability of the ureteral stent 100 and is convenient for the production of the ureteral stent 100.
[0048] As a preferred solution of this embodiment, the widths of the first fixing section 110 and the second fixing section 210 are 5 mm to 10 mm. The width of the third fixing section 30 is 8 mm to 10 mm.
[0049] The average diameter of the patient's ureter 40 is between 6 mm and 7 mm. During the process of fixing the ureter 40, the first main body 10 and the second main body 20 approach each other. Especially when the spiral structures of the first supporting section 120 and the second supporting section 220 are arranged in a cross-misaligned manner, the first fixing section 110 and the second fixing section 210 also have a certain degree of approach. Defining the widths of the first fixing section 110 and the second fixing section 210 to be 5 mm to 10 mm can ensure that the fixed distance formed between the first fixing section 110 and the second fixing section 210 is greater than the average diameter of the patient's ureter 40, achieving the purpose of fixing one end of the ureteral stent 100. Defining the width of the third fixing section 30 to be 8 mm to 10 mm achieves the purpose of fixing the other end of the ureteral stent 100.
[0050] It should be understood that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. For those skilled in the art, the technical solutions recorded in the above embodiments can be modified, or some of the technical features can be equivalently replaced; and all such modifications and replacements should fall within the protection scope of the appended claims of the present invention.
Claims
1. A ureteral stent, characterized in that: include: A first body, the first body comprising a first fixed section and a first supporting section connected thereto; A second body, located at one side of the first body and arranged opposite to the first body, the second body comprising a second fixing section and a second supporting section connected thereto; a third fixing section, provided on a side of the first body and the second body away from the first fixing section, the third fixing section being used to connect the first body and the second body; Wherein, the first supporting segment and / or the second supporting segment comprises a spiral structure.
2. The ureteral stent according to claim 1, characterized in that: The spiral structure is a same-warp structure, and the diameter of the spiral structure is 3 mm to 10 mm.
3. The ureteral stent according to claim 1, characterized in that: The spiral structure is a variable diameter structure.
4. The ureteral stent according to claim 1, characterized in that: The first supporting segment and the second supporting segment each include a plurality of spiral structures, and the spiral structures of the first supporting segment and the spiral structures of the second supporting segment are arranged in a one-to-one correspondence.
5. The ureteral stent according to claim 1, characterized in that: The outer circumference of the third fixing section is an arc structure.
6. The ureteral stent according to claim 1, characterized in that: The first fixing section and the second fixing section are in a curled structure.
7. The ureteral stent according to claim 6, characterized in that: The first fixing section is located on a side of the first supporting section facing away from the second fixing section, and the second fixing section is located on a side of the second supporting section facing away from the first fixing section.
8. The ureteral stent according to claim 1, characterized in that: The first main body, the second main body and the third fixing section are all hollow tubes, and a cutout is formed on a side of the third fixing section away from the first main body.
9. The ureteral stent according to claim 8, characterized in that: A first through hole is formed on the side wall of the first body, and a second through hole is formed on the side wall of the second body.
10. The ureteral stent according to any one of claims 1 to 9, characterized in that: The width of the first fixing section and the second fixing section is 5 mm to 10 mm, and the width of the third fixing section is 8 mm to 10 mm.