Novel ureteral stent tube and use method thereof

Abstract

The invention discloses a novel ureteral stent tube and a using method thereof, and relates to the technical field of medical equipment.The novel ureteral stent tube comprises a first supporting section, a second supporting section and a connecting section, and the connecting section is connected with the first supporting section and the second supporting section; at least one of the first supporting section and the second supporting section is provided with a liquid guide hole; in the ureter, the first supporting section and the second supporting section are arranged in the radial direction of the ureter, and the outer side of the first supporting section can make contact with the outer side of the second supporting section. The cutting part is formed on the outer side of at least one of the first supporting section and the second supporting section, and the cutting part can increase the intensity of pressure, acting on the inner wall of the ureter, of the outer side of the novel ureter stent tube. According to the technical scheme, the problem that an existing novel ureteral stent tube lacks the capacity of cutting the narrow section of the ureter can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical equipment, and in particular to a novel ureteral stent tube and a use method thereof. Background Art

[0002] Ureteral stenosis is a common disease in urology and a common complication after ureteroscopic lithotripsy. Ureteral stenosis often causes ureteral obstruction and renal damage. Ureteral stenosis is difficult to treat, prone to recurrence, and has many postoperative complications. It is a difficult disease to treat in urology. Most of the new ureteral stents in the prior art are designed with a single structure and lack the ability to cut the ureteral stenosis. Summary of the invention

[0003] The main purpose of the present invention is to provide a novel ureteral stent and a method of using the same, aiming to solve the problem that the existing novel ureteral stent lacks the ability to cut open the ureteral stricture segment.

[0004] To achieve the above-mentioned purpose, the novel ureteral stent tube proposed by the present invention comprises:

[0005] a first supporting segment, a second supporting segment, and a connecting segment, wherein the connecting segment connects the first supporting segment and the second supporting segment, and at least one of the first supporting segment and the second supporting segment is provided with a liquid guide hole; in the ureter, the first supporting segment and the second supporting segment are arranged along the radial direction of the ureter, and the outer side of the first supporting segment can contact the outer side of the second supporting segment; and

[0006] A cutting portion is formed on the outer side of at least one of the first supporting segment and the second supporting segment, so that the outer side of at least one of the first supporting segment and the second supporting segment has an edge, and the edge can increase the pressure exerted by the outer side of the new ureteral stent tube on the inner wall of the ureter.

[0007] In one embodiment, the cutting portion is configured as a long strip structure, and the cutting portion is extended along the length direction of the supporting section.

[0008] In one embodiment, the cutting portion is configured as a continuous long strip structure;

[0009] And / or, the cutting portion is configured in plurality.

[0010] In one embodiment, the cutting portion is configured as a ridge, and the cutting portion is configured in plurality.

[0011] In one embodiment, the first supporting segment is provided with a cutting portion, and the second supporting segment is provided with a liquid guiding hole.

[0012] In one embodiment, the material of the first support segment is silicone or polyurethane;

[0013] The second supporting section is made of silicone or polyurethane, and the connecting section is made of silicone or polyurethane.

[0014] In one embodiment, the connecting segment connects ends of the first supporting segment and the second supporting segment.

[0015] In one embodiment, one end of the first supporting segment and the second supporting segment away from the connecting segment can be in a curled state.

[0016] In one embodiment, during installation, the first supporting segment is located inside the ureteroscope, the second supporting segment is located outside the ureteroscope, and one end of the second supporting segment that can be in a curled state is connected to a wire for the operator to pull;

[0017] And / or, the outer circumference diameter of the first supporting segment is 3.5Fr-5Fr; the outer circumference diameter of the second supporting segment is 3.5Fr-5Fr; the outer circumference diameter of the connecting segment is 2Fr-3Fr;

[0018] And / or, the novel ureteral stent tube is integrally formed;

[0019] And / or, the liquid guiding hole is arranged in the first supporting segment, and the liquid guiding hole passes through two ends of the first supporting segment along the length direction thereof.

[0020] The present invention further provides a method of use, which is applied to a novel ureteral stent tube, wherein the novel ureteral stent tube is any of the novel ureteral stent tubes described above, wherein the liquid guide hole is provided in the first supporting section, the liquid guide hole passes through both ends of the first supporting section arranged along the length direction thereof, and the cutting portion is provided on the outside of the second supporting section;

[0021] The method of use includes:

[0022] Passing a guide wire through the guide hole into the first support section, the first support section is arranged inside the ureteroscope, the second support section is arranged outside the ureteroscope, and a wire is connected to one end of the second support section away from the head of the ureteroscope;

[0023] The ureteroscope is placed into a preset position in the ureter, and during the placement process, the operator pulls the silk thread to keep the tail end of the silk thread outside the urethral opening;

[0024] The top tube is inserted into the tail end of the guide wire. Under the guidance of the guide wire, the top tube enters the ureteroscope until it hits the tail end of the first support segment. The position of the first support segment remains unchanged, and the ureteroscope is gradually withdrawn from the ureteral opening to the bladder neck. The wire is not pulled during this period.

[0025] Ureteroscopy was used to observe that the tail ends of the first support segment and the second support segment were both located in the bladder. Finally, the guide wire was withdrawn, the top tube was removed, the silk thread was cut, and the silk thread was withdrawn, leaving the first support segment and the second support segment in the ureter and bladder.

[0026] The technical solution of the present invention is that the first support segment and the second support segment are arranged in the ureter along the radial direction of the ureter, and a cutting portion is formed on the outer side of at least one of the first support segment and the second support segment. At this time, when the patient is breathing and walking, the inner wall of the ureter rubs against the outer side of the first support segment and the side of the second support segment. Further, under the action of the edge portion, when the inner wall of the ureter rubs against the outer side of the first support segment and the outer side of the second support segment, the edge portion can increase the pressure at the friction position, thereby having a cutting effect on the fibers of the inner wall of the ureter. With continuous friction, the cutting portion can cut off the fibers of the inner wall of the ureter, thereby solving the technical problems existing in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0028] Figure 1 A schematic structural diagram of an embodiment of a novel ureteral stent tube provided by the present invention;

[0029] Figure 2 A schematic structural diagram of another embodiment of the novel ureteral stent tube provided by the present invention;

[0030] Figure 3 A schematic diagram of the use of the novel ureteral stent provided by the present invention when it is inserted into the ureter;

[0031] Figure 4 This is a flow chart of the method for using the novel ureteral stent tube provided by the present invention.

[0032] Description of Figure Numbers:

[0033] 100, first supporting section;

[0034] 200, second supporting section;

[0035] 300, connecting section;

[0036] 400, cutting part;

[0037] 500, edge;

[0038] 600, liquid guide hole;

[0039] 700, thread;

[0040] 800, ureteroscope;

[0041] 900, Pipe Jacking;

[0042] 10. Guide wire.

[0043] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0046] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0047] Ureteral stenosis is a common disease in urology and a common complication after ureteroscopic lithotripsy. Ureteral stenosis often causes ureteral obstruction and renal damage. Ureteral stenosis is difficult to treat, prone to recurrence, and has many postoperative complications. It is a difficult disease to treat in urology. The new ureteral stent tubes in the prior art are mostly single-structure designs and lack the ability to cut the ureteral stenosis. It should be noted that ureteral stenosis is caused by the ureter. It should be noted that ureteral stenosis is usually caused by thickening and fibrosis of the ureteral wall, which leads to stenosis. The existing new ureteral stent tubes are relatively smooth in appearance and cannot cut the fibers at the ureteral stenosis section well.

[0048] The invention provides a novel ureteral stent tube.

[0049] See also Figure 1In one embodiment of the present invention, the novel ureteral stent tube comprises a first supporting section 100, a second supporting section 200, a connecting section 300, and a cutting portion 400; further, the connecting section 300 connects the first supporting section 100 and the second supporting section 200, and in the ureter, the first supporting section 100 and the second supporting section 200 are arranged along the radial direction of the ureter, and the outer side of the first supporting section 100 can contact the outer side of the second supporting section 200; it should be noted that, according to the setting position of the connecting section, the first supporting section 100, the second supporting section 200 The support segment 200 and the connecting segment can form an "n"-shaped or "H"-shaped structure. It can be understood that when the connecting segment connects the ends of the first support segment 100 and the second support segment 200, the first support segment 100, the second support segment 200 and the connecting segment can form an "n"-shaped structure. When the connecting segment connects the middle positions of the first support segment 100 and the second support segment 200, the first support segment 100, the second support segment 200 and the connecting segment can form an "H"-shaped structure. In other words, the new ureteral stent tube can be placed in the ureter in an "n"-shaped or "H"-shaped structure. At least one of the first support segment 100 and the second support segment 200 is provided with a liquid guide hole 600, which is used to guide urine in the ureter to ensure that urine can flow in the ureter, wherein the liquid guide hole 600 can make the first support segment 100 or the second support segment 200 a hollow structure. The cutting portion 400 is formed on the outer side of at least one of the first support segment 100 and the second support segment 200, so that the outer side of at least one of the first support segment 100 and the second support segment 200 has an edge 500, and the edge 500 can increase the pressure exerted by the outer side of the new ureteral stent tube on the inner wall of the ureter. It should be noted that, by arranging the first support segment 100 and the second support segment 200 in the ureter along the radial direction of the ureter, and forming a cutting portion 400 on the outer side of at least one of the first support segment 100 and the second support segment 200, when the patient is breathing and walking, the inner wall of the ureter rubs against the outer side of the first support segment 100 and the side of the second support segment 200. Further, under the action of the edge portion 500, when the inner wall of the ureter rubs against the outer side of the first support segment 100 and the outer side of the second support segment 200, the edge portion 500 can increase the pressure at the friction position, thereby having a cutting effect on the fibers of the inner wall of the ureter. With continued friction, the cutting portion 400 can cut off the fibers of the inner wall of the ureter, thereby solving the technical problems existing in the prior art. At the same time, since the first support segment 100 and the second support segment 200 are arranged along the radial direction of the ureter, the first support segment 100 and the second support segment 200 can also push and rub against each other, further increasing the friction frequency between the edge 500 and the inner wall of the ureter.It should be noted that when the connecting segment is configured as silicone or other materials with a certain degree of elasticity, the connecting segment can also make the first support segment 100 and the second support segment 200 tend to move away from each other. This trend can increase the force of the first support segment 100 and the second support segment 200 on the inner wall of the ureter.

[0050] Furthermore, in some embodiments, the material of the first support segment 100 is configured as silicone or polyurethane; the material of the second support segment 200 is configured as silicone or polyurethane, and the material of the connecting segment is configured as silicone or polyurethane. Such a configuration can make the new ureteral stent tube have better biocompatibility with the ureter.

[0051] Further, the novel ureteral stent tube of the present application may be of the following structures, for example: the first support segment 100 is a solid structure, the second support segment 200 is a hollow structure, and the cutting portion 400 is formed on the outside of the first support segment 100 and / or the second support segment 200; the first support segment 100 and the second support segment 200 are both hollow structures, and the cutting portion 400 is formed on the outside of the first support segment 100 and / or the second support segment 200. Specifically, the present application provides a structure in which the second support segment 200 is a solid structure, the first support segment 100 is a hollow structure, and the cutting portion 400 is formed on the outside of the second support segment 200 (see FIG. Figure 1 , Figure 2 ).

[0052] In one embodiment, reference Figure 1 The cutting portion 400 is configured as a long strip structure. Furthermore, the long strip structure can be a triangular prism or other prism structures. The cutting portion 400 is extended along the length direction of the supporting section. In this way, the new ureteral stent can move up and down in the ureter during the patient's breathing and walking. At this time, the cutting portion 400 is extended along the length direction of the supporting section, which can enable the edge portion 500 to better act on the inner wall of the ureter and achieve a better cutting effect.

[0053] In one embodiment, reference Figure 1 , the cutting portion 400 is configured as a continuous long strip structure, and the edge portion 500 is a long linear structure. This arrangement can make the edge portion 500 have a larger contact area with the inner wall of the ureter, and at the same time, the edge portion 500 can move more smoothly in the ureter. In some embodiments, the cutting portion 400 can be configured as multiple sections. When the cutting portion 400 is configured as multiple sections, the multiple sections of the cutting portion 400 are arranged at intervals along the length direction of the support section.

[0054] Furthermore, in some embodiments, the cutting portion 400 may also be disposed in a spiral shape outside the supporting section, and in this case, the edge portion 500 may be in a spiral structure (see Figure 2).

[0055] In some embodiments, reference Figure 1 , the cutting portion 400 is configured as a plurality, and the plurality of cutting portions 400 are arranged at intervals around a circle on the outside of the support segment. In some embodiments, when the cutting portion 400 is configured as a plurality, and the cutting portion 400 is a connected long strip structure, the plurality of cutting portions 400 can make the radial interface of the support segment present a triangular, diamond or other polygonal structure, and the plurality of cutting portions 400 can be provided to increase the number of the ridges 500, and also to improve the contact probability between the ridges 500 and the inner wall of the ureter.

[0056] In some embodiments, the cutting portion 400 is configured as a ridge (not shown), and the cutting portion 400 is configured in multiples. In this case, the ridge 500 is a point-like structure, or a shorter linear structure. At this time, when the support segment moves in the ureter, the ridge can have a cutting effect on the fibers on the inner wall of the ureter.

[0057] In one embodiment, reference Figure 1 When the first support segment 100, the second support segment 200, and the connecting segment can form an "n"-shaped structure, further, the ends of the first support segment 100 and the second support segment 200 away from the connecting segment can be in a curled state. At the same time, in order to make the ends of the first support segment 100 and the second support segment 200 away from the connecting segment in a curled state, a coil spring structure can be placed inside the first support segment 100 and the second support segment 200. The coil spring structure can make the ends of the first support segment 100 and the second support segment 200 away from the connecting segment in a curled state. In the curled state, after the new ureteral stent is placed in the ureter, the curled portion can be located in the bladder. When the new ureteral stent is subsequently taken out, the new ureteral stent can be taken out of the ureter by clamping the curled portion located in the bladder.

[0058] In one embodiment, reference Figure 3 During installation, the first support segment 100 is located inside the ureteroscope, the second support segment 200 is located outside the ureteroscope, and one end of the second support segment 200 that can be in a curled state is connected to a wire 700 for the operator to pull. This makes it easier to install the new ureteral stent tube in this embodiment into the ureter, and at the same time, the first support segment 100 and the second support segment 200 installed in the ureter can be arranged along the radial direction of the ureter.

[0059] In one embodiment, the outer diameter of the first support segment 100 is 3.5Fr-5Fr, where 1Fr is equal to 0.33mm. Further, the outer diameter of the second support segment 200 is 3.5Fr-5Fr. In one embodiment, the outer diameter of the connecting segment is 2Fr-3Fr, which can facilitate the placement of the new ureteral stent into the ureter and also enable the cutting portion 400 to better contact the inner wall of the ureter.

[0060] In some embodiments, the novel ureteral stent tube is integrally formed, and the integral forming method can facilitate the production and processing of the novel ureteral stent tube, and at the same time can improve the connection stability between the cutting portion 400 and the first support segment 100 and / or the second support segment 200.

[0061] In some embodiments, the liquid guide hole is arranged in the first support segment, and the liquid guide hole passes through both ends of the first support segment along its length direction. Such arrangement can facilitate the placement of the new ureteral stent tube into the ureter, wherein such arrangement of the liquid guide hole can facilitate the insertion of the guide wire.

[0062] The present invention also provides a method of use, referring to Figure 3 , Figure 4 , applied to a new ureteral stent tube, the specific structure of which refers to any of the above embodiments.

[0063] The method of use includes:

[0064] S10, inserting the guide wire 10 into the first support segment 100 through the liquid guide hole, the first support segment is arranged inside the ureteroscope 800, the second support segment 200 is arranged outside the ureteroscope 800, and a wire is connected to the end of the second support segment 200 away from the head of the ureteroscope 800.

[0065] S20, inserting the ureteroscope 800 into a preset position in the ureter, during which the operator pulls the thread to keep the tail end of the thread outside the urethral opening;

[0066] S30, insert the top tube 900 into the tail end of the guide wire 10, and the top tube 900 enters the ureteroscope 800 under the guidance of the guide wire 10 until it hits the tail end of the first support section 100, and the position of the first support section 100 remains unchanged, and the ureteroscope 800 gradually withdraws from the ureteral opening to the bladder neck; during this period, the wire is not pulled;

[0067] S40, ureteroscope 800 observes that the tail end of the first support segment 100 and the tail end of the second support segment 200 are both located in the bladder, and finally the guide wire is pulled out, the top tube is withdrawn, the silk thread is cut, and the silk thread is pulled out, leaving the first support segment and the second support segment in the ureter and bladder.

[0068] It should be noted that the above-mentioned tail end and head end should be understood as the end that enters the ureter first as the head end, and the end that does not enter or enters the ureter later as the tail end, or in other words, when the ureteral stent is moving, the end located in the front is the head end, and the end located in the back is the tail end. With the above-mentioned method of use, before the new ureteral stent is inserted, the first support segment 100 and the second support segment 200 can be arranged along the radial direction of the ureteroscope. After being inserted into the ureter, the first support segment 100 and the second support segment 200 can be arranged along the radial direction of the ureter, so that the new ureteral stent can be easily inserted into the ureter. Further, by arranging the first support segment 100 and the second support segment 200 in the ureter along the radial direction of the ureter, and the outer shape of at least one of the first support segment 100 and the second support segment 200 There is a cutting portion 400. When the patient is breathing and walking, the inner wall of the ureter rubs against the outer side of the first support segment 100 and the side of the second support segment 200. Further, under the action of the edge portion 500, when the inner wall of the ureter rubs against the outer side of the first support segment 100 and the outer side of the second support segment 200, the edge portion 500 can increase the pressure at the friction position, thereby having a cutting effect on the fibers of the inner wall of the ureter. With continued friction, the cutting portion 400 can cut off the fibers of the inner wall of the ureter, thereby solving the technical problems existing in the prior art.

[0069] Furthermore, in some embodiments, when the first support segment 100 and the second support segment 200 are in a curled state, when the operator inserts the new ureteral stent into the ureter, in order to avoid curling of the second support segment 200 disposed on the outside of the ureteroscope, the operator can adjust the second support segment 200 by pulling the wire 700 during the insertion process, so as to facilitate better insertion of the second support segment 200 into the ureter.

[0070] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A novel ureteral stent tube, characterized in that: include: a first supporting segment, a second supporting segment, and a connecting segment, wherein the connecting segment connects the first supporting segment and the second supporting segment, and at least one of the first supporting segment and the second supporting segment is provided with a liquid guide hole; in the ureter, the first supporting segment and the second supporting segment are arranged along the radial direction of the ureter, and the outer side of the first supporting segment can contact the outer side of the second supporting segment; and A cutting portion is formed on the outer side of at least one of the first supporting segment and the second supporting segment, so that the outer side of at least one of the first supporting segment and the second supporting segment has an edge, and the edge can increase the pressure exerted by the outer side of the new ureteral stent tube on the inner wall of the ureter.

2. The novel ureteral stent tube according to claim 1, characterized in that: The cutting portion is configured as a long strip structure, and the cutting portion is extended along the length direction of the supporting section.

3. The novel ureteral stent tube according to claim 2, characterized in that: The cutting portion is configured as a continuous long strip structure; And / or, the cutting portion is configured in plurality.

4. The novel ureteral stent tube according to claim 1, characterized in that: The cutting portion is configured as a ridge, and the cutting portion is configured in plurality.

5. The novel ureteral stent tube according to claim 1, characterized in that: The first supporting section is provided with a cutting portion, and the second supporting section is provided with a liquid guiding hole.

6. The novel ureteral stent tube according to claim 5, characterized in that: The material of the first supporting section is silicone or polyurethane; The second supporting section is made of silicone or polyurethane, and the connecting section is made of silicone or polyurethane.

7. The novel ureteral stent according to claim 1, characterized in that: The connecting section connects the ends of the first supporting section and the second supporting section.

8. The novel ureteral stent tube according to claim 7, characterized in that: One end of the first supporting segment and the second supporting segment away from the connecting segment can be in a curled state.

9. The novel ureteral stent tube according to claim 8, characterized in that: During installation, the first supporting section is located inside the ureteroscope, the second supporting section is located outside the ureteroscope, and one end of the second supporting section that can be in a curled state is connected to a wire for the operator to pull; And / or, the outer circumference diameter of the first supporting segment is 3.5Fr-5Fr; the outer circumference diameter of the second supporting segment is 3.5Fr-5Fr; the outer circumference diameter of the connecting segment is 2Fr-3Fr; And / or, the novel ureteral stent tube is integrally formed; And / or, the liquid guiding hole is arranged in the first supporting segment, and the liquid guiding hole passes through two ends of the first supporting segment along the length direction thereof.

10. A method of use, applied to a new type of ureteral stent, characterized in that: The novel ureteral stent tube is the novel ureteral stent tube according to any one of claims 1 to 9, wherein the liquid guide hole is provided in the first supporting section, the liquid guide hole passes through both ends of the first supporting section arranged along the length direction thereof, and the cutting portion is provided on the outside of the second supporting section; The method of use includes: Passing a guide wire through the guide hole into the first support section, the first support section is arranged inside the ureteroscope, the second support section is arranged outside the ureteroscope, and a wire is connected to one end of the second support section away from the head of the ureteroscope; The ureteroscope is placed into a preset position in the ureter, and during the placement process, the operator pulls the silk thread to keep the tail end of the silk thread outside the urethral opening; The top tube is inserted into the tail end of the guide wire. Under the guidance of the guide wire, the top tube enters the ureteroscope until it hits the tail end of the first support segment. The position of the first support segment remains unchanged, and the ureteroscope is gradually withdrawn from the ureteral opening to the bladder neck. The wire is not pulled during this period. Ureteroscopy was used to observe that the tail ends of the first support segment and the second support segment were both located in the bladder. Finally, the guide wire was withdrawn, the top tube was removed, the silk thread was cut, and the silk thread was withdrawn, leaving the first support segment and the second support segment in the ureter and bladder.

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