Stent tube for ureter skin stoma and using method thereof

Abstract

The invention belongs to the technical field of medical instruments, and particularly relates to a ureter skin stoma stent tube and a using method thereof.The ureter skin stoma stent tube comprises a flow guide catheter and a connecting part, drainage holes are formed in the flow guide catheter, the flow guide catheter comprises a middle tube body and a fixing part, and the middle tube body comprises a first tube body and a second tube body; one in-vitro end of the first tube body is connected with one in-vitro end of the second tube body through the connecting part, the fixing part can deform, the fixing part extends outwards in the radial direction in the natural state, the connecting part is provided with a flow guide groove used for guiding and discharging urine out of the body, the stent of the structure does not need to go deep into the renal pelvis of a patient, and the risk of kidney infection of the patient is reduced; the support effect is achieved on the ureteral obstruction of the passing section caused by abdominal wall muscles and fat; meanwhile, operation is easy, replacement is convenient, and the workload of patients and medical staff is relieved.

Description

Technical Field

[0001] The invention belongs to the technical field of medical devices, and specifically relates to a stent tube for ureteral skin stoma and a use method thereof. Background Art

[0002] Bladder cancer is a very common malignant tumor of the urinary system. Invasive bladder cancer usually requires the removal of the entire bladder and its surrounding tissues and pelvic lymph nodes. There are several main ways to divert urine flow after cystectomy: in situ neobladder, ileal conduit, and ureterocutaneous ostomy. Among them, ureterocutaneous ostomy is relatively simpler than ileal conduit. It does not require the intestine to be cut, and the free ureter is directly connected to the abdominal wall to make a stoma. The incidence of intestinal and urinary incontinence complications of this surgery is much lower than that of in situ neobladder and ileal conduit, but the incidence of stoma stenosis and urinary tract infection is higher.

[0003] Ureterostomy is divided into "double ureterostomy on both sides" and "double ureterostomy on one side". Among them, "double ureterostomy on one side" is to pull the left and right ureters to the stoma position on the abdominal wall. After merging, the distal ends of the two ureters are longitudinally cut open for about 6 cm, and the side-to-side anastomosis is 3.5-4 cm. The terminal end is 2-2.5 cm and sutured and fixed with the skin stoma. That is, the stoma anastomosis between the ureteral end and the skin is performed by inserting a double "V"-shaped skin flap between the double ureteral flaps (such as Figure 5 This operation is relatively simple, with short operation time, less trauma, and fewer external stomas. However, this procedure is prone to poor urine drainage and hydronephrosis because the thin and soft ureter is easily squeezed by abdominal muscles and fat when passing through the abdominal wall. At the same time, the blood supply between the end of the ureter and the skin of the abdominal wall is relatively poor, and anastomotic stenosis is prone to occur after anastomosis. Therefore, a single "J" ureteral stent is used for a period of time after the operation or even for life. One end is placed in the renal pelvis of the left and right kidneys, and the other end is placed outside the body to drain urine (such as Figure 5 ). Because the top of the long-term indwelling ureteral stent is located in the renal pelvis, the stent tube is thin, and the longer the path is, the easier it is to get blocked, which can easily lead to hydronephrosis and pyelonephritis. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a stent tube for ureteral skin stoma and a method of using the same, which has a simple structure and is easy to use. It does not require the stent to be fixed through the renal pelvis, thus solving the problems mentioned in the above background technology.

[0005] The present invention provides the following technical solution: a ureterostomy stent tube, comprising a diversion catheter and a connecting portion, wherein the diversion catheter is provided with a diversion channel for guiding urine in the ureter to the interior of a ureterostomy stent tube, thereby being discharged from the body through the stent, the diversion catheter comprising an intermediate tube body and a fixing portion, wherein the intermediate tube body comprises a first tube body and a second tube body, wherein one end of the first tube body and the second tube body outside the body is connected by a connecting portion, wherein the fixing portion can be deformed, and wherein the fixing portion extends radially outward in a natural state, and wherein the connecting portion is provided with a diversion groove for guiding urine out of the body.

[0006] The fixing part is located in the ureter, two drainage ports are arranged on the abdominal wall, the first tube body and the second tube body are respectively located in the two drainage ports of the abdominal wall, and the cavity in the diversion catheter allows the inner core to pass through the middle tube body from the connecting part to reach the fixing part.

[0007] The two drainage ports of the abdominal wall are adjacent and located on the same side of the abdominal wall. The size interval of the two drainage ports is based on the size of the abdominal stoma chassis, and the size interval is not more than 5 cm. The distal end of the fixed part is a reduced and molded introduction tip, and the distal end face of the introduction tip is provided with a guide hole, which is a part of the diversion channel, and the inner core is a push tube and a guide wire. The inventor of the present application has found that the reason why ureterostomy is prone to obstruction in the clinical process is usually that the ureter passes through the abdominal wall and is subjected to lateral pressure from the muscles. Therefore, the ureter running part in the abdominal cavity is not easily compressed. Only by supporting the abdominal wall segment can the vast majority of ureteral obstruction problems be solved, and retrograde infection of the renal pelvis can be avoided. Only when the two ureters are anastomosed on the same side of the abdominal wall, two drainage ports within a range of 5 cm can ensure effective support for the abdominal wall and the ureterostomy port, and the anastomosis of the abdominal wall and the ureter (i.e., supporting the ureter passing through the abdominal wall segment) has a good effect, which can solve the vast majority of ureteral obstruction problems.

[0008] The guide groove is at the proximal end of the connecting portion, and the connecting portion includes a connecting transverse portion and a connecting bend portion, and both ends of the connecting transverse portion are respectively connected to the connecting bend portion, and are connected to the proximal end of the intermediate tube body through the connecting bend portion.

[0009] The guide groove includes a guide transverse groove located at the connecting transverse part, the guide transverse groove is a transverse through groove in the proximal direction of the connecting transverse part, the guide bend groove is near the proximal end of the connecting bend, and the distal external incision of the guide bend groove is located at and after the critical point of the connecting bend passing the turning point, that is, at and after the critical point where the liquid flow direction changes, so that the liquid in the guide conduit passes through the guide bend groove, so that the liquid is discharged in a direction parallel to the axis of the guide conduit or in a direction close to the axis.

[0010] The distance between the axes at the distal ends of the first tube body and the second tube body is less than or equal to the distance between the proximal end of the intermediate tube body and the connection part. Since this operation requires the ureters on both the left and right sides in the body to be dissected, if the distance between the axes of the first tube body and the second tube body increases from the proximal end to the distal end, the length required for one of the ureters (i.e., the ureter on the side away from the drainage opening on the abdominal wall) will become longer, and the distal end of one of the tube bodies of the intermediate tube body will incline downward. Considering the self-weight of the ureter and the liquid in the ureter, a small amount of liquid will not easily flow through the ureter into the diversion catheter, and there may be a small amount of liquid remaining in the ureter, which is likely to cause the ureter to be in contact with the retained urine for a long time and be easily contaminated.

[0011] The fixing part includes an introducing tip and a shaping structure connected to the proximal end of the introducing tip. The shaping structure is a plurality of strip-shaped bodies evenly distributed along the axis of the introducing tip. The proximal ends of the strip-shaped bodies are connected to the distal openings of the corresponding intermediate tube bodies. In the natural state, the cross-section of the strip-shaped body is V-shaped. There is a position in the diversion hole at the end of the introducing tip where the diameter of the diversion hole is smaller than the diameter of the guide wire. The diameter of the diversion hole at the introducing tip can be one, and it can be a conical diversion hole. The diversion channel includes the drainage holes provided on the introducing tip, the gaps formed between and surrounded by the plurality of strip-shaped bodies, and the cavity inside the tube.

[0012] Optionally, the fixing part is a circular shaping section. The diversion channel includes the drainage holes staggered on the diversion catheter, the diversion holes opened at the distal end of the diversion tip, and the cavity inside the tube. The diversion channels are interconnected with each other for introducing urine into the stent and discharging it out of the body. The drainage holes are provided on the fixing part and a part of the intermediate tube body.

[0013] Optionally, the fixing part is a spiral structure. The drainage channel includes the drainage holes staggered on the diversion catheter, the diversion holes opened at the distal end of the diversion tip, and the cavity inside the tube. The drainage channels are interconnected with each other for introducing urine into the stent and discharging it out of the body. The drainage holes are provided on the fixing part and a part of the intermediate tube body.

[0014] A method for using a stent tube for ureterocutaneous fistula. Use any one of the above-mentioned stent tubes for ureterocutaneous fistula. One drainage stent corresponds to two adjacent pipelines, and one guide wire corresponds to one pipeline (referring to the ureter). The distal end of one guide wire sequentially passes through the corresponding fixing part, the middle tube body and the connecting part, and exits from the diversion groove of the connecting part. A push tube is sleeved outside the corresponding guide wire. Push the push tube to move into the drainage stent. Under the action of the push tube, the fixing part deforms and extends in the axial direction. Then, make the top tip pass through the pipeline (abdominal wall and ureter), so that the drainage stent penetrates into the pipeline on one side. Withdraw the guide wire and the push tube, and the fixing part returns to its free state. The drainage stent is stuck in the passage, and repeat the operation for the other pipeline.

[0015] Compared with the prior art, the present invention has the following beneficial effects: One end of a stent tube for ureterocutaneous fistula is implanted into the ureters on both sides of the patient respectively. A stent tube for ureterocutaneous fistula is clamped in the ureter, and the diversion groove drains out of the body. This structure of the stent does not need to penetrate deep into the patient's renal pelvis, reducing the discomfort of the patient; it plays a protective role for ureteral obstruction caused by the abdominal wall; at the same time, the operation is simple, the replacement is convenient, and the workload of the patient and medical staff is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structure schematic diagram of a stent tube for ureterocutaneous fistula in Specific Embodiment 1 of the present invention; Figure 2 It is a schematic cross-sectional structure diagram of the front view structure of a stent tube for ureterocutaneous fistula in Specific Embodiment 1 of the present invention; Figure 3 It is a side view structure schematic diagram of a stent tube for ureterocutaneous fistula in Specific Embodiment 1 of the present invention; Figure 4 It is a schematic diagram of the implantation structure of a stent tube for ureterocutaneous fistula in Specific Embodiment 1 of the present invention; Figure 5 It is a schematic diagram of the implantation of a "single J" stent in the double ureter one-side stoma surgery of the prior art; Figure 6 It is a three-dimensional structure schematic diagram of a stent tube for ureterocutaneous fistula in Specific Embodiment 3 of the present invention; Figure 7 It is a schematic cross-sectional structure diagram of a stent tube for ureterocutaneous fistula in Specific Embodiment 3 of the present invention; Figure 8 It is a schematic diagram of the implantation structure of a stent tube for ureterocutaneous fistula in Specific Embodiment 3 of the present invention; Figure 9 It is a three-dimensional structure schematic diagram of a stent tube for ureterocutaneous fistula in Specific Embodiment 5 of the present invention; Figure 10This is a schematic side view structure diagram of a stent tube for ureterocutaneous fistula in Specific Embodiment 5 of the present invention.

[0017] In the figure: 1. Diversion catheter; 11. Fixing part; 12. Intermediate tube body; 13. Diversion hole; 14. Drainage hole; Introduction tip; 112. Shaping structure; 113. Circular shaping section; 114. Spiral structure; First tube body; 122. Second tube body; 2. Connection part; 21. Connection bent part; 22. Connection transverse part; 23. Diversion groove; 231. Diversion bent groove; 232. Diversion transverse groove. Specific embodiments

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0019] When using a traditional ureteral stent, one end extends deep into the renal pelvis and the other end is placed outside the fistula opening. It is easy to cause complications such as hydronephrosis and pyelonephritis. For patients with a stoma on one side after bilateral ureteral one-side stoma surgery, there is only one stoma on the abdomen. For implanting two single-J ureteral stents, the outlet is small, which is not conducive to stent implantation.

[0020] Specific Embodiment 1: Please refer to Figures 1-4 . As Figure 1 , Figure 2 , a stent tube for ureterocutaneous fistula includes 2 diversion catheters 1 and a connection part 2. The tube body (including the diversion catheter 1 and the connection part 2) of a stent tube for ureterocutaneous fistula is formed of TPU material. The material has good elasticity and good support performance, which is conducive to the drainage of the patient's urine; a diversion channel is provided on the diversion catheter 1 for guiding the urine in the ureter into the interior of a stent tube for ureterocutaneous fistula, so as to be discharged out of the body through this stent. The diversion catheter 1 includes an intermediate tube body 12 and a fixing part 11. The fixing part 11 is at the distal end of the intermediate tube body 12. The intermediate tube body 12 is divided into a first tube body 121 and a second tube body 122. The first tube body 121 and the second tube body 122 are not in the same diversion catheter 1. The outer ends of the first tube body 121 and the second tube body 122 are connected by the connection part 2. The fixing part 11 can be deformed, and the fixing part 11 extends radially outward in the natural state.

[0021] The fixing part includes an introducing tip and a shaping structure connected to the proximal end of the introducing tip. The shaping structure 112 is a plurality of strip-shaped bodies evenly distributed along the axis of the introducing tip 111. The proximal ends of the strip-shaped bodies are connected to the distal openings of the corresponding intermediate tube bodies. In the natural state, the cross-section of the strip-shaped body is V-shaped. There is a position in the diversion hole 13 at the end of the introducing tip 111 where the diameter of the diversion hole 13 is smaller than the diameter of the guide wire. The diversion hole 13 at the end of the introducing tip 111 penetrates through the introducing tip 111. The diameter of the diversion hole 13 on the end face of the introducing tip 111 can be a value, which can be a changing value of the conical diversion hole 13.

[0022] The distal end of the fixing part 11 is a reduced-sized introducing tip 111. The distal size of the introducing tip 111 is smaller than the proximal size of the introducing tip. In this specific embodiment, the cross-section of the introducing tip 111 is a frustum of a cone. The distal end face of the introducing tip 111 is also provided with a diversion hole 13. The axis of the diversion hole on the distal end face of the introducing tip 111 is parallel or coincident with the axis of the introducing tip. In this specific embodiment, the two coincide. The inner diameter of the drainage hole 13 on the distal end face of the introducing tip 111 is not limited to a single fixed size and can also be variable, such as the drainage hole 13 is also frustum-shaped. The introducing tip 111 is for the convenience of moving in the ureter. Second, the ureteral diameter of some users is relatively small, such as children. The through-going diversion hole 13 provided on the introducing tip 111 can introduce urine from the ureter into the stent of the present invention and thus discharge it out of the body, preventing the situation where the side holes of the tube body are easily blocked when the ureteral diameter is small in the prior art. The drainage holes 14 on the outer wall of the tube body of the drainage catheter 1 are easily blocked by the tube wall. Due to the difference in the increase of the diameter in the axial direction on the introducing tip 111, this situation can be avoided. Third, when withdrawing the ureterocutaneous fistula stent tube, it prevents the drainage holes 14 on the outer walls of other drainage catheters 1 except the drainage tip 111 from being blocked by the ureteral wall and air cannot enter, resulting in difficulty in withdrawing the ureterocutaneous fistula stent tube. The diversion hole 13 provided on the distal end face of the introducing tip 111 can also enhance the above effects.

[0023] The introducing tip 111 is for the convenience of moving in the ureter and also for cooperating with the inner core. The inner core (guide wire and push tube) reaches the distal end or the inside of the introducing tip 111. Due to the structural limitation of the introducing tip 111, the inner core cannot continue to pass through the introducing tip 111, thereby pushing the introducing tip 111 to move distally together, so that the shaping structure 112 (i.e., a plurality of strip-shaped bodies) is axially extended and the shaping structure contracts radially.

[0024] The shaping structure 112 (i.e., a plurality of strip-shaped bodies), the longitudinal cross-section of the strip-shaped body is V-shaped or V-like. At least the pointed parts of the V-shaped strip-shaped bodies are not connected to each other. The roots can be connected or not. The unconnected parts will be separated from each other in the natural state, such as Figure 1 andFigure 2 As shown, there is a gap between adjacent strips. This gap ensures that even if the ureteral diameter is small, urine can flow into the subsequent intermediate tube body 12 through the gap between the strips. The shaping structure 112 can divert a sufficiently large volume of liquid. The diversion holes 13 at the end of the guiding tip 111 enable urine to enter the space enclosed by the strips through the front diversion holes 13, and then flow into the subsequent intermediate tube body 12.

[0025] When the stent tube for ureterocutaneostomy is withdrawn in the present invention, there will be no problem that the diversion channel is blocked by the ureteral wall, air cannot enter, and it is difficult to withdraw the stent tube for ureterocutaneostomy.

[0026] The connecting portion 2 is provided with a diversion groove 23. The liquid in the ureter can enter the intermediate tube body 12 from the fixing portion 11 (the diversion holes 13 at the end and / or the gap between the multiple strips of the shaping structure 112 of the fixing portion), then enter the connecting portion 2, and finally be diverted and discharged out of the body through the diversion groove 23. It can be externally connected to a urine bag or other devices. In the case of a urine bag, the connecting portion 2 can be inserted into the opening of the urine bag. Urine is discharged through the diversion groove 23 of the connecting portion 2 and collected by the urine bag. The cooperation between the urine bag and the abdominal wall is an existing structure. It can be through a chassis patch, with one side attached around the abdominal wall incision, playing a barrier role to protect the skin around the abdominal wall stoma and avoid contact with urine. The other side of the chassis patch is connected to the urine bag. For the traditional single-J tube, the distance led out of the body is relatively long, and the external end of the single-J tube is prone to knotting, taking up space and being difficult to manage. In the design of the present application, the connecting portion connects the first tube body and the second tube body, and the diversion groove is relatively close to the abdominal wall. The urine outlet of the diversion groove is close to the abdominal wall, saving space and being easier to manage.

[0027] The fixing portion 11 is located inside the ureter. There are 2 drainage openings on the abdominal wall. The 2 drainage openings are adjacent and on the same side of the abdominal wall. The size interval between the 2 drainage openings is based on the size of the abdominal stoma chassis, and the size interval is not greater than 5 cm. The first tube body 121 and the second tube body 122 respectively cooperate with the two drainage openings on the abdominal wall, that is, the two diversion ducts 1 respectively extend into the two drainage openings and further extend into the ureters communicated with each drainage opening.

[0028] The cavity in the diversion duct 1 allows the inner core to pass through the intermediate tube body from the connecting portion to reach the fixing portion. The inner core is a push tube and a guide wire.

[0029] The diversion groove 23 is at the proximal end of the connecting portion 2. The connecting portion 2 includes a connecting transverse portion 22 and a connecting bent portion 21. The two ends of the connecting transverse portion 22 are respectively connected to the connecting bent portion 21, and the proximal end of the intermediate tube body 12 is connected through the connecting bent portion 21.

[0030] The diversion groove 23 includes a diversion transverse groove 232 located in the connecting transverse portion 22. The diversion transverse groove 232 is a transverse through groove in the proximal direction of the connecting transverse portion 22. The diversion curved groove 231 is in the proximal direction of the connecting curved portion 21. The distal outer incision of the diversion curved groove 231 is located at and after the critical point of the turning point of the connecting curved portion 21, that is, at and after the critical point of the change in the liquid flow direction, so that the liquid in the diversion conduit 1 passes through the diversion curved groove 231, and the liquid is discharged along the direction parallel to the axis of the diversion conduit 1 or in the direction approaching the axis.

[0031] The distance between the axes at the distal ends of the first tube body 121 and the second tube body 122 is less than or equal to the distance between the proximal end of the intermediate tube body 12 and the connection portion 2. Since this operation requires freeing the ureters on both the left and right sides in the body, if the first tube body and the second tube body are in the proximal-to-distal direction and the distance between their axes becomes larger, it will cause the length of one of the ureters (i.e., the ureter on the side away from the drainage opening on the abdominal wall) to become longer, and the distal end of one of the tube bodies of the intermediate tube body will incline downward. Coupled with the self-weight of the ureter and considering the liquid in the ureter, a small amount of liquid will not easily flow through the ureter into the diversion conduit, and there may be a small amount of liquid remaining in the ureter, which is likely to cause the ureter to be in contact with the retained urine for a long time and is prone to contamination.

[0032] The ends of the left and right ureters are directly anastomosed to the abdominal wall on the same side, and two adjacent drainage openings are formed on the abdominal wall on the same side, so that each ureter can be directly drained; through this design, it solves the problem that there is only one stoma on the abdomen of patients with a single stoma on one side of the bilateral ureterostomy. For implanting two single-J ureteral stents, the outlet is small and it is not conducive to stent implantation, and it can timely detect lesions in the unilateral kidney and / or ureter, solving the problem in the prior art that it is impossible to detect which side has problems. Specific embodiments

[0033] The second aspect of the present invention provides a method for using a stent tube for ureterocutaneous fistula. Using the specific embodiment 1 of a stent tube for ureterocutaneous fistula, the method of use is as follows: One drainage stent corresponds to two adjacent pipelines. Specifically, in application, the pipelines refer to the left and right ureters. The two diversion conduits included in a stent tube for ureterocutaneous fistula respectively correspond to two adjacent ureters on the left and right sides. Specifically, when the left and right ureters are pulled to the abdominal wall stoma position, the ends of the left and right ureters are directly anastomosed to the abdominal wall on the same side, and two adjacent drainage openings are formed on the abdominal wall on the same side, so that each ureter can be directly drained; through this design, it solves the problem that there is only one stoma on the abdomen of patients with a single stoma on one side of the bilateral ureterostomy. For implanting two single-J ureteral stents, the outlet is small and it is not conducive to stent implantation.

[0034] The proximal end of a guide wire enters the ureter anastomosed with it through one drainage opening; At the distal end of a guide wire, it successively passes through the corresponding fixing part 11, the middle tube body 12 and the connecting part 2, and exits from the diversion groove 23 of the connecting part 2. A push tube is sleeved outside the corresponding guide wire. The push tube is pushed to move into the ureterocutaneous fistula stent tube. Under the action of the push tube, the fixing part 11 deforms and extends along the axial direction. Then, the leading tip 111 at the top passes through the pipeline, that is, enters the ureter from the abdominal wall, so that the ureterocutaneous fistula stent tube penetrates into one side of the ureter. The guide wire and the push tube are withdrawn. The multiple strips of the shaping structure 112 of the fixing part 11 return from the stretched state to the free state. The distal end of the ureterocutaneous fistula stent tube is stuck in the ureter, and the operation is repeated for the other pipeline.

[0035] In specific application, a push tube and a guide wire (the push tube and the guide wire are not shown in the drawings, which does not affect those skilled in the art to understand the technical solution of the present invention) are used to pass through the diversion groove 23 at the bottom and penetrate into the diversion hole 13 on one side, and the shaping section (i.e., the shaping structure 112 in this embodiment) in the fixing part 11 at the end is straightened. Then, the leading tip 111 at the top passes through the abdominal wall and the ureter, so that the tube body of a ureterocutaneous fistula stent tube penetrates into one side of the ureter. Then, the guide wire is withdrawn, and the multiple strips of the shaping structure 112 return from the stretched state. One end of the ureterocutaneous fistula stent tube is stuck in the ureter; the operation is repeated on the other side, and the diversion catheter at the other end extends into the other ureter from another drainage opening. When in use, the urine produced by the kidney flows through the ureter into the diversion hole 13 of the leading tip 111 and the shaping structure 112 composed of multiple strips, flows into the diversion hole 13 (i.e., the lumen of the middle tube body) in the middle tube body 12, flows to the bottom diversion groove 23, and is discharged out of the body.

[0036] A ureterocutaneous fistula stent tube of the present invention is implanted into the ureters on both sides of the patient at both ends, and the middle part is opened for drainage and discharged out of the body as Figure 4 shown. A ureterocutaneous fistula stent tube of the present invention does not need to penetrate deep into the patient's renal pelvis, and avoids the risk of kidney infection in the patient; at the same time, it plays a protective role in preventing ureteral obstruction caused by the relatively thick abdominal wall to the relatively soft and fragile ureter; at the same time, the operation is simple, the replacement is convenient, and the workload of the patient and medical staff is reduced. Specific embodiment

[0037] The difference between this specific embodiment and the specific embodiment 1 is that: as Figures 6-8 shown, the circular shaping section 113 of the fixing part 11 in this specific embodiment, as Figure 6 and Figure 7 shown, the circular shaping section 113 is an incompletely closed circular tube body. The incompletely closed opening means that the distal end and the proximal end of the circular shaping section do not connect end to end to form a complete circle, so as to ensure that the circular shaping section can have a natural state and a straightened deformation.

[0038] The fixing part 11 is in a deformable state and will become larger in its natural state. When an external force is applied, it will straighten. Straightening is an ideal state, that is, the circular shaping section 113 of the fixing part will extend or elongate in the axial direction, and the radial resistance becomes smaller.

[0039] The diversion channel includes the diversion hole 13 at the introduction tip 111, the drainage holes 14 arranged at multiple locations, and the lumen of the intermediate tube body. The diversion channels are interconnected with each other and are used to introduce urine into the stent and discharge it outside the body. The drainage holes 14 are provided on the fixing part 11 and a part of the intermediate tube body 12. The drainage holes 14 also need to be provided on the fixing part 11, while on the intermediate tube body 12, the drainage holes 14 are provided on a part of the intermediate tube body 12 because the part of the intermediate tube body 12 close to the proximal end extends outside the body, and it is easy to discharge urine at the entrance part of the urine collection device at this part, and improper operation is likely to dirty the adjacent part. The drainage holes 14 are arranged alternately on the diversion catheter 1, either in a positive and negative alternating arrangement or in a spiral alternating arrangement, so as to allow the urine in the ureter to flow into the ureterocutaneous fistula stent tube from the drainage holes 14 as much as possible, and the urine is discharged outside the body through the drainage stent. The cavity in the diversion catheter 1 allows the inner core to pass through the intermediate tube body from the connection part to reach the fixing part. The inner core is a push tube and a guide wire.

[0040] The introduction tip 111 is for the following reasons: one is to facilitate movement in the ureter; the second is that although the diversion holes 14 are arranged on the outer wall of the tube body of the diversion catheter 1 (i.e., the fixing part 11 and the intermediate tube body 12) in a positive and negative manner, the diameters of the ureters of some users are relatively small, such as children, and the drainage holes 14 on the outer wall of the tube body of the diversion catheter 1 are likely to be blocked by the tube wall. Due to the difference in the increase in diameter in the axial direction on the introduction tip 111, this situation can be avoided; the third is that when withdrawing the ureterocutaneous fistula stent tube, it prevents the drainage holes 14 on the outer wall of the other diversion catheter 1 except the drainage tip 111 from being blocked by the ureter wall, and air cannot enter, resulting in difficulty in withdrawing the ureterocutaneous fistula stent tube. The diversion hole 13 provided on the distal end face of the introduction tip 111 can also enhance the above effects.

[0041] The connection part 2 is provided with a diversion groove 23. The liquid in the ureter can enter the intermediate tube body 12 from the fixing part 11 (the diversion hole 13 at the end and / or the drainage holes 14 on both sides of the fixing part wall) or the drainage holes 14 of the intermediate tube body 12, then enter the connection part 2, and finally be discharged outside the body through the diversion groove 23. Specific embodiments

[0042] The second aspect of the present invention provides a method for using a ureterocutaneous fistula stent tube. Using the ureterocutaneous fistula stent tube in specific embodiment 3, the method of use is as follows: One drainage stent corresponds to two adjacent pipelines. In specific application, the pipelines refer to the ureters on the left and right sides. The two diversion catheters contained in a ureterostomy stent tube correspond to the two adjacent ureters on the left and right sides respectively. In specific application, after the left and right ureters are pulled to the stoma position of the abdominal wall, the ends of the left and right ureters are directly anastomosed with the abdominal wall on the same side, and two adjacent drainage ports are formed on the abdominal wall on the same side, so that each ureter can be directly drained. Through this design, the problem that patients with bilateral ureterostomy with one side have only one stoma port in the abdomen, and the outlet of two ureteral single-J stents is small, which is not conducive to the implantation of the stent, can be solved, and lesions in the unilateral kidney and / or ureter can be checked in time, solving the problem that the existing technology cannot check which side has the problem.

[0043] The proximal end of a guide wire is passed from one drainage port into the anastomosed ureter; The distal end of a guide wire passes through the corresponding fixing part 11, the middle tube body 12 and the connecting part 2 in sequence, and passes through the guide groove 23 of the connecting part 2. A push tube is sleeved on the outside of the corresponding guide wire to push the push tube to move into the ureterostomy stent tube. Under the action of the push tube, the fixing part 11 is deformed and extends in the axial direction. Then, the introduction tip 111 at the top passes through the pipeline, that is, enters the ureter from the abdominal wall, so that the ureterostomy stent tube penetrates into the ureter on one side, the guide wire and the push tube are pulled out, and the circular shaping section 113 of the fixing part 11 returns to a free state. The distal end of the ureterostomy stent tube is stuck in the ureter, and the operation is repeated for the other pipeline.

[0044] In specific application, a push tube and a guide wire (the push tube and the guide wire are not shown in the drawings, and will not affect the understanding of the technical solution of the present invention by those skilled in the art) are used to pass through the bottom guide groove 23 and into the guide hole 13 on one side, and the shaping section (i.e., the circular shaping section 113 in this embodiment) in the fixing portion 11 at the end is straightened, and then the top introduction tip 111 is passed through the abdominal wall and the ureter, so that the tube body of a ureterostomy stent tube is deeply inserted into the ureter on one side, and then the guide wire is withdrawn to make the circular shaping section 113 return. Under the action of the elasticity of the tube body, one end of the ureterostomy stent tube is stuck in the ureter; the operation is repeated on the other side, and the guide catheter at the other end extends into another ureter from another drainage port. When in use, urine produced by the kidney flows through the ureter into the guide holes 13 at both ends of the guide catheter 1 and the drainage holes 14 on both sides, and flows into the guide holes 13 in the middle tube body 12, flows to the bottom guide groove 23, and is discharged from the body.

[0045] The present invention discloses a stent tube for ureteral skin stoma, the two ends of which are respectively implanted into the ureters on both sides of the patient, and the middle opening is used for drainage and discharge of the fluid from the body. Figure 8As shown in the figure. A stent tube for ureterocutaneostomy of the present invention does not need to penetrate deep into the patient's renal pelvis, thus avoiding the risk of kidney infection in the patient; it plays a protective role for ureteral obstruction caused by the abdominal wall; at the same time, the operation is simple, the replacement is convenient, and the workload of the patient and medical staff is reduced.

[0046] Specific Embodiment 5: The difference between this specific embodiment and Specific Embodiment 3 is that the fixing part is a spiral structure 114. When the distal end and the proximal end of the spiral of the spiral structure 114 are in the natural state, the distance between the two should not be too large, and they should be in contact or have a small interval to avoid excessive pressure on the inner wall of the ureter by the spiral in the natural state or long-term pressure damage to the ureter. This structure can increase the depth of the two ends penetrating into the ureter and increase the strength of being stuck into the ureter, making the stent tube for ureterocutaneostomy not easy to fall off.

[0047] The usage method is the same as that of Specific Embodiment 4.

[0048] Specific Embodiment 6: The difference between this specific embodiment and Specific Embodiment 1 or 2 or 3 or 4 or 5 is that the present invention uses TPU material, and a radiopaque agent can be added to this material, which is beneficial to observing the insertion situation through equipment during implantation, and the material has good elasticity and good support performance, which is beneficial to the drainage of the patient's urine.

[0049] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation to the present invention; the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations. Moreover, the terms "including", "comprising" or any other variation thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0050] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A stent tube for ureteral skin stoma, characterized in that: It includes a diversion catheter and a connecting part, the diversion catheter is provided with a diversion channel, the diversion catheter includes an intermediate tube body and a fixing part, the intermediate tube body includes a first tube body and a second tube body, the first tube body and the second tube body are connected at one end outside the body by the connecting part, the fixing part can be deformed, the fixing part extends radially outward in a natural state, and the connecting part is provided with a diversion groove for diverting urine out of the body.

2. The ureterostomy stent according to claim 1, characterized in that: The fixing part is located in the ureter, two drainage ports are arranged on the abdominal wall, the first tube body and the second tube body are respectively located in the two drainage ports of the abdominal wall, and the cavity in the diversion catheter allows the inner core to pass through the middle tube body from the connecting part to reach the fixing part.

3. The ureterostomy stent according to claim 1, characterized in that: The two drainage ports of the abdominal wall are adjacent and located on the same side of the abdominal wall. The size interval is based on the size of the abdominal stoma base. The distal end of the fixed part is a reduced introduction tip. The distal end face of the introduction tip is provided with a guide hole. The inner core is a push tube and a guide wire.

4. The ureterostomy stent according to claim 1, characterized in that: The guide groove is at the proximal end of the connecting portion, and the connecting portion includes a connecting transverse portion and a connecting bend portion, and both ends of the connecting transverse portion are respectively connected to the connecting bend portion, and are connected to the proximal end of the intermediate tube body through the connecting bend portion.

5. The ureterostomy stent according to claim 4, characterized in that: The guide groove includes a guide transverse groove located at the connecting transverse part, the guide transverse groove is a transverse through groove in the proximal direction of the connecting transverse part, the guide bend groove is near the proximal end of the connecting bend, and the distal external incision of the guide bend groove is located at and after the critical point of the connecting bend passing the turning point, that is, at and after the critical point where the liquid flow direction changes, so that the liquid in the guide conduit passes through the guide bend groove, so that the liquid is discharged in a direction parallel to the axis of the guide conduit or in a direction close to the axis.

6. The ureterostomy stent tube according to claim 5, characterized in that: The distance between the axes at the distal ends of the first tube body and the second tube body is less than or equal to the distance between the proximal end of the intermediate tube body and the connecting portion.

7. The ureterostomy stent according to claim 1, characterized in that: The fixing portion includes an introduction tip and a shaping structure connected to the proximal end of the introduction tip, the shaping structure is a plurality of strip-shaped bodies evenly distributed along the axis of the introduction tip, the proximal end of the strip-shaped body is connected to the distal opening of the corresponding intermediate tube body, the cross-section of the strip-shaped body is V-shaped in a natural state, there is a position in the guide hole at the end of the introduction tip where the diameter of the guide hole is smaller than the diameter of the guide wire, and the guide channel includes the drainage hole set on the introduction tip and the gaps between and surrounded by the plurality of strip-shaped bodies and the cavity in the tube body.

8. The ureterostomy stent according to claim 1, characterized in that: The fixing portion is a circular shaped section, and the diversion channel includes drainage holes staggered on the diversion catheter, a diversion hole opened at the distal end of the diversion tip, and a cavity in the tube body. The diversion channels are interconnected and are used to guide urine into the bracket and discharge it out of the body. The drainage holes are arranged on the fixing portion and part of the intermediate tube body.

9. The ureterostomy stent according to claim 1, characterized in that: The fixing part is a spiral structure, and the diversion channel includes drainage holes staggered on the diversion catheter, a diversion hole opened at the distal end of the diversion tip, and a cavity in the tube body. The diversion channels are interconnected and are used to guide urine into the bracket and discharge it out of the body. The drainage holes are arranged on the fixing part and part of the intermediate tube body.

10. A method for using a stent tube for ureteral skin stoma, characterized in that: A ureterostomy stent tube as described in any of claims 1 to 9 is used, wherein one drainage stent corresponds to two adjacent pipelines, and one guide wire corresponds to each pipeline. The distal end of one guide wire passes through the corresponding fixed part, the intermediate tube body and the connecting part in sequence, and passes through the guide groove of the connecting part. A push tube is sleeved on the outside of the corresponding guide wire to push the push tube to move into the drainage stent. Under the action of the push tube, the fixed part is deformed and extends in the axial direction, and then the top tip passes through the pipeline, so that the drainage stent is deeply inserted into the pipeline on one side, the guide wire and the push tube are pulled out, the fixed part returns to a free state, the drainage stent is stuck in the pipeline, and the operation is repeated for the other pipeline.

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