Double-antibody ureteral stent tube

Abstract

The invention relates to a double-resistance ureter stent tube which comprises a hollow tube body with drainage through holes in the tube wall, one end of the tube body is a bent renal pelvis end, the other end of the tube body is a straight-strip-shaped bladder end, a plurality of suture lines are fixedly arranged on the tube wall of the bladder end at intervals, and the suture lines are connected with the drainage through holes. The suture lines are sequentially connected in pairs in the circumferential direction of the pipe wall to form a plurality of coils, and the suture lines are connected through line knots which are arranged in the middles of the suture lines and close to the sides of the free ends of the suture lines. The ureteral stent can effectively reduce stimulation of the ureteral stent, pressure is dispersed through the tail end, drainage is optimized, and the postoperative comfort of a patient is improved.

Description

Technical Field

[0001] This invention relates to the field of medical devices, and in particular to a dual-anti-ureteral stent. Background Technology

[0002] Ureteral stents are widely used after urological surgery to support the ureter and drain urine. Traditional ureteral stents (double-J stents), after placement, typically have the portion within the bladder coiled into a loop. Due to gravity and the peristaltic movement of the ureter during urination, this portion can shift downwards to varying degrees, causing the coiled end to rub against the bladder mucosa, irritating the bladder trigone and leading to urinary tract irritation symptoms. This can easily cause vesicoureteral reflux, resulting in lower back pain during or outside of urination, severely impacting the patient's postoperative quality of life. Summary of the Invention

[0003] To address the shortcomings of existing methods, this invention provides a dual-anti-ureteral stent.

[0004] The technical solution adopted by the present invention to solve its technical problem is: a dual-anti-ureteral stent tube, comprising a hollow tube body with a drainage hole in the tube wall, one end of the tube body being a curved renal pelvis end, and the other end of the tube body being a straight bladder end, wherein multiple sutures are fixedly arranged at intervals on the tube wall of the bladder end, and the multiple sutures are connected in pairs along the circumference of the tube wall to form multiple loops, and the sutures are connected by a knot located in the middle of the suture and adjacent to the free end of the suture.

[0005] Preferably, the distance from the knot to the free end of the suture is 1 / 3 to 1 / 2 of the length from the fixed end to the free end of the suture.

[0006] Preferably, the suture is fixed to the tube wall by sewing or gluing.

[0007] Preferably, the suture is a 4-0 niprill suture.

[0008] Preferably, the length from the fixed end to the free end of the suture is 1 / 5 to 1 / 3 of the tube length.

[0009] Preferably, at least three coils are formed.

[0010] Preferably, the tube is a silicone tube or a polyurethane tube.

[0011] Preferably, the surface of the tube is coated with a functional coating.

[0012] Preferably, the drainage holes are provided in multiple locations, and the multiple drainage holes are equally spaced on the pipe wall of the pipe body.

[0013] Preferably, the outer diameter of the suture is no greater than 1 / 10 of the inner diameter of the tube.

[0014] The beneficial effects of this invention are as follows: This invention changes the traditional coiled end to a structure composed of multiple coils formed by sutures and free ends of the sutures outside the coils, significantly reducing the mechanical stimulation of the bladder trigone by the stent tube, decreasing the incidence of urinary tract symptoms and lower back pain, and improving postoperative patient comfort. Simultaneously, the multi-line structure optimizes urine drainage, reduces the risk of reflux, and is simple in structure, low in cost, and easy to promote, showing promising clinical application prospects. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the support tube according to an embodiment of the present invention; Figure 2 This is an embodiment of the present invention. Figure 1 Enlarged structural block diagram of A in the middle; Figure 3 This is an image of the stent tube in the bladder according to an embodiment of the present invention; The names and serial numbers of the components in the picture are: 1-tube body, 10-drainage hole, 2-renal pelvis end, 3-bladder end, 4-suture, 40-coil, 41-knot. Detailed Implementation

[0016] To more clearly illustrate the objectives, technical solutions, and advantages of the embodiments of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. It is clear and complete that the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the protection scope of the present invention.

[0017] Examples of embodiments of the present invention Figures 1 to 2As shown, a dual-resistance ureteral stent includes a hollow tube body 1 with drainage holes 10 on its wall. The tube body 1 uses the same tube body as existing double-J stents, such as silicone or polyurethane tubes. Multiple drainage holes 10 are provided, evenly spaced on the tube wall, meaning multiple drainage holes 10 are equally spaced along the same straight line in the axial direction of the tube body 1, and also evenly spaced along the circumferential direction of the tube body 1. One end of the tube body 1 is a curved renal pelvic end 2, which is used for insertion into the renal pelvis, and its curved shape is the same as that of the end of existing double-J stents. The other end of the tube body 1 is a straight bladder end 3, which is used for insertion into the bladder. Multiple drainage holes 10 are spaced from the renal pelvic end 2 to the bladder end 3. Multiple sutures are fixedly arranged at intervals on the wall of the bladder end 3. Line 4, that is, multiple sutures 4 are set at intervals along the circumference of the tube wall near the opening of the tube body 1 on the wall of the bladder end 3. Each suture 4 is fixed to the outer surface of the tube wall. The sutures 4 are non-degradable surgical sutures, such as 4-0 niprilin sutures. The outer diameter of the suture 4 is not greater than 1 / 10 of the inner diameter of the tube body 1, so that the suture 4 can still maintain flexibility in the bladder and reduce irritation. At this time, the suture 4 can be fixed to the tube wall of the tube body 1 by sewing or gluing. The sewing method is to sew a suture 4 to the tube wall and leave two ends of a certain length. The front end of each end of the suture 4 is the fixed end of the suture 4 at the tube wall, and the tail end away from the tube wall is the free end of the suture 4. The end of the suture 4 is heated to make it thermoplastic deformation into a curled structure. Then, the suture 4 can be knotted at the position of the tube wall for further fixation.The adhesive bonding method involves first applying medical-grade soft tissue adhesive to the outer surface of the tube wall using an adhesive dispensing device. Then, one end of a suture 4 or the midpoint of a suture 4 is pressed onto the adhesive-coated area and fixed under pressure until cured. The end of the suture 4 furthest from the fixed point becomes the free end. Multiple sutures 4 are connected in pairs along the circumference of the tube wall to form multiple loops 40. The sutures 4 are connected by knots 41 located in the middle of the suture 4 and adjacent to the free end. That is, the knot 41 is tied in the middle of the suture 4, and the distance from the knot 41 to the fixed end is greater than the distance from the knot 41 to the free end. At least three loops 40 are formed, for example, three loops 40 are formed at the three equal division points of the circumference of the tube wall, or four loops 40 are formed at the four equal division points of the circumference of the tube wall. It is preferred to form four loops 40, that is, sew them at the four equal division points of the tube wall. Four sutures 4, each suture 4 is divided into two segments by fixing it to the tube wall, resulting in eight segments on the tube wall of tube body 1. The two segments formed by the first suture are called the first segment and the second segment, the two segments formed by the second suture are called the third segment and the fourth segment, the two segments formed by the third suture are called the fifth segment and the sixth segment, and the two segments formed by the fourth suture are called the seventh segment and the eighth segment. At this point, the first and second segments are connected by tying a knot 41 at a certain distance from the free end in a clockwise direction, thus forming the first loop between the knot 41 and the fixed end. The part of the suture between the free end of each segment and the knot 41 is the curled free segment. In the same way, the third and fourth segments are connected to form the second loop, the fifth and sixth segments are connected to form the third loop, and the seventh and eighth segments are connected to form the fourth loop. When in use, the stent is inserted from the bladder to the renal pelvis. Under the guidance of the guidewire, the stent is inserted. After the suture 4 reaches the urethral orifice, the stent is pushed into the bladder with a pusher catheter until the suture knot 41 reaches the orifice of the ureter. Figure 3 As shown, at this time, part of the coil 40 is in the ureter, and the other part, along with the knot 41, is in the bladder. The coiled free segments form a multi-line structure in the bladder, greatly reducing stimulation to the trigone of the bladder. The knot 41 and the coiled free segments prevent the stent tube from retracting. The sutures 4 form multiple channels, reducing eddies, lowering reflux, and optimizing drainage. During fabrication, one end of the tube body 1 is bent into a pigtail shape, while the other end is straight. The sutures 4 are then sewn onto the end near the port. After sewing the sutures 4 onto the tube body 1, the length from the fixed end to the free end of each segment of each suture 4 is 4-6 cm. Then, the knot 41 is tied 2 cm away from the free end.

[0018] Further improvements include setting the distance from knot 41 to the free end of suture 4 to be 1 / 3 to 1 / 2 of the length from the fixed end to the free end of suture 4. In other words, for the same suture 1, the distance from knot 41 to the free end of each segment is 1 / 3 to 1 / 2 of the length of each segment. For example, if the distance from knot 41 to the free end is 2cm, the distance from the knot to the fixed end is 3.5cm. The length from the fixed end to the free end of suture 4 is 1 / 5 to 1 / 3 of the length of tube 1. For example, if the length of tube 1 is 26cm, the length from the fixed end to the free end of suture 4 is 5.5cm. Knot 41 is tied 2cm from the free end, and suture 4 is sewn 0.5cm from the bladder end 3.

[0019] Further improvements include a functional coating (not shown in the figure) applied to the surface of tube 1. Depending on the specific needs, the functional coating can be either an antibacterial coating or a lubricating coating. The antibacterial coating can be a nano-silver coating, which kills or inhibits bacteria attempting to attach, preventing biofilm formation at the source, reducing the incidence of symptomatic urinary tract infections during catheterization, alleviating patient suffering, and reducing antibiotic use. The lubricating coating can be a polyvinylpyrrolidone (PVP) coating, which makes the surface of the stent tube smoother, reduces mechanical irritation to the bladder mucosa, improves the patient's quality of life, and is not conducive to the adhesion and deposition of crystals and proteins. It can effectively delay the scaling process and maintain the patency and functionality of the stent tube drainage.

[0020] Although the present invention has been described in detail above with general descriptions and specific embodiments, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A dual-anti-ureteral stent tube, characterized in that, The tube includes a hollow tube with drainage holes in its wall. One end of the tube is a curved renal pelvis end, and the other end is a straight bladder end. Multiple sutures are fixedly arranged at intervals on the wall of the bladder end. The multiple sutures are connected in pairs along the circumference of the tube wall to form multiple loops. The sutures are connected by a knot located in the middle of the suture and adjacent to the free end of the suture.

2. The dual-anti-ureteral stent tube according to claim 1, characterized in that, The distance from the knot to the free end of the suture is 1 / 3 to 1 / 2 of the length of the suture from the fixed end to the free end.

3. The dual-anti-ureteral stent tube according to claim 1, characterized in that, The suture is fixed to the tube wall by sewing or gluing.

4. The dual-anti-ureteral stent tube according to claim 1, characterized in that, The suture is a 4-0 Niprin suture.

5. The dual-anti-ureteral stent tube according to claim 1, characterized in that, The length from the fixed end to the free end of the suture is 1 / 5 to 1 / 3 of the tube length.

6. The dual-anti-ureteral stent tube according to claim 1, characterized in that, The coils are formed in at least three units.

7. The dual-anti-ureteral stent tube according to claim 1, characterized in that, The tube body is a silicone tube or a polyurethane tube.

8. The dual-anti-ureteral stent tube according to claim 1, characterized in that, The surface of the tube is coated with a functional coating.

9. The dual-anti-ureteral stent tube according to claim 1, characterized in that, The tube has multiple drainage holes, which are equally spaced on the tube wall.

10. The dual-anti-ureteral stent tube according to claim 1, characterized in that, The outer diameter of the suture is no greater than 1 / 10 of the inner diameter of the tube.

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