Ureteral skin stoma self-expansion metal covered stent and urine collection combination
By designing a self-expanding metal coating stent for ureteral dermatostomy, the painful problem caused by long-term replacement of the inclusions in patients after ureteral dermatostomy is solved, and the self-expanding and patency of the stoma is achieved, reducing the patient's pain and financial burden.
Patent Information
- Application Number
- CN202322724684.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-10-10
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2033-10-10
AI Technical Summary
After ureteral dermatostomy, patients need to replace the double or single tubes that are placed for a long time and regularly, which leads to worsening of pain. It is often caused by inflammation, infection and single tube long stones to cause stoma stenosis and difficulty in removing it.
Design a metal-coated stent with self-expanding ureteral stomatosis, including a dumbbell-shaped stent body consisting of wavy memory wire and polymer membrane, with self-expanding function. The stent does not enter the kidneys, but only reaches a few centimeters at the end of the ureter. , and combined with urine collection, to achieve urine delivery through the orthost pocket.
It reduces the pain caused by the insert and keeps the ureteral stomatology unobstructed. Patients can wear only the stoma pocket without the need to bring the insert, which reduces the pain and financial burden of the patient and improves the quality of life.
Smart Images
Figure CN222172373U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of ureteral stents, and more specifically, to a ureteral skin stoma self-expanding metal coated stent and urine collecting combination for ureteral skin stoma. Background Art
[0002] Ureterostomy is a urinary diversion procedure commonly used in patients with bladder tumors after cystectomy. After ureterostomy, patients need to replace the inserted double-J tube or single-J tube on a long-term and regular basis. One end of the double-J tube or single-J tube is inserted deeper and needs to enter the kidney, which often causes great pain to patients.
[0003] Since patients often need to perform operations on their ureterostomy, coupled with inflammation, infection, etc., the ureterostomy is often narrowed. In addition, stones in the single-J tube make it difficult to remove the single-J tube, which aggravates the patient's pain.
[0004] In summary, a self-expanding metal covered stent for ureterostomy is provided, which not only does not enter the kidney, but also only reaches a few centimeters at the end of the ureter, greatly reducing the pain caused by the implant, and it has a self-expanding function, through which the ureterostomy can be continuously expanded, so that the ureterostomy is sufficiently unobstructed, and finally the patient does not need to wear any implants, but only needs to wear a stoma bag. Therefore, a metal covered stent that can be left in the body for a long time and can self-expand the ureterostomy has become an urgent need in this medical field. Utility Model Content
[0005] The utility model aims to address the deficiencies of the prior art and to provide a self-expanding metal-coated stent and urine collection assembly for ureterostomy that is ingenious in structure, easy to use and has good effects.
[0006] To achieve one aspect of the above purpose, the support tube of the utility model adopts the following technical solution:
[0007] A self-expanding metal-coated stent for ureteral skin stoma, the metal-coated stent comprising a stent body that is dumbbell-shaped after release, the stent body consisting of a wavy memory metal wire and a polymer film covering the surface of the memory metal wire, the memory metal wire is spirally wound along the length direction of the stent body; the outer diameters at both ends of the stent body are larger than the outer diameter of the middle part between the two ends, one end is a limiting part and the other end is a fixing part; the fixing part is used to connect to a stoma bag for receiving urine.
[0008] In a preferred embodiment, in the released state, the limiting portion is cylindrical and the fixing portion is trumpet-shaped.
[0009] In a preferred embodiment, in the released state, the outer diameters of the opening ends of the limiting portion and the fixing portion are 1.5-2.5 times the outer diameter of the middle portion.
[0010] In some embodiments, in the released state, the stent body has a length of 5-8 cm and a circumference of 12-36F.
[0011] In a preferred embodiment, the inner side of the polymer film at the opening end of the limiting portion has a blunt and smooth design to prevent scratching of the ureter.
[0012] In order to achieve the above-mentioned purpose, the urine collection assembly provided by the present invention adopts the following technical solutions:
[0013] A urine collection assembly comprises an ostomy bag and the above-mentioned metal coated stent, wherein the ostomy bag comprises a bottom plate, and a fixing portion of the metal coated stent is connected to the bottom plate of the ostomy bag to transport urine into the ostomy bag.
[0014] In some embodiments, the open end of the fixing portion is tied to the bottom plate of the ostomy bag by medical sutures.
[0015] In a preferred embodiment, a plurality of evenly distributed fixing rings are provided on the inner side of the buckling ring on the chassis for buckling with the urine inlet port of the ostomy bag, and the fixing rings are bound together with the fixing part of the metal coated stent by medical sutures.
[0016] Preferably, a plurality of fixing holes corresponding to the positions of the fixing ring are provided on the open end of the fixing portion, and the fixing ring is bound together with the fixing holes by medical sutures.
[0017] After the utility model adopts the above structure, the stent is prevented from shifting by integrally forming a limiting part with different outer diameters on the stent body. If there is an adverse reaction after surgery or after recovery, the metal coated stent can be removed. Not only does it not enter the kidney, but it only reaches a few centimeters at the end of the ureter, greatly reducing the pain caused by the implant, and it has a self-expansion function, through which the ureteral skin stoma can be continuously expanded to make the ureteral skin stoma sufficiently unobstructed, and ultimately the patient does not need to wear any implants, but only needs to wear a stoma bag.
[0018] At the same time, because the coating is attached to the wall of the stent, it can prevent polyps and stones from being embedded in the lumen and causing blockage. The utility model can be left in the body for a long time, can prevent displacement, can improve the quality of life of patients with ureterostomy, reduce the pain of repeated tube changes for patients, and reduce the economic burden of patients. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a structural schematic diagram of the support body of the utility model;
[0020] Figure 2 a is a schematic diagram of the bottom plate of the ostomy bag in the urine collection assembly of the utility model;
[0021] Figure 2 b is a schematic diagram of an ostomy bag in the urine collection assembly of the utility model;
[0022] Figure 3 It is a schematic diagram of the structure in which the support body is accommodated in the support release device in the utility model;
[0023] Description of reference numerals:
[0024] 1-stent body; 2-memory metal wire; 3-polymer film; 41-limiting part; 42-fixing part; 5-fixing hole; 51-medical suture;
[0025] 11- chassis of the stoma bag; 61- buckle ring; 6- fixing ring; 12- stoma bag; 13- urine inlet port of the stoma bag;
[0026] 7-Stand release device; 8-Operating rod; 9-Positioning plate; 10-Release sheath. DETAILED DESCRIPTION
[0027] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the present invention.
[0028] It should be noted that, for ease of description, spatially relative terms, such as "upper", "lower", etc., may be used to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation other than the orientation described in the figure. For example, the device in the figure may also be inverted. Of course, the device may also be positioned in other different ways (rotated 90 degrees or in other orientations).
[0029] In addition, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus that includes a series of steps or elements is not necessarily limited to those steps or elements explicitly listed, but may include other steps or elements not explicitly listed or inherent to such process, method, product, or apparatus.
[0030] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.
[0031] like Figure 1 As shown, a ureterostomy self-expanding metal coated stent of the utility model includes a stent body 1 that is dumbbell-shaped after release, and the stent body 1 includes a wavy memory metal wire 2 and a polymer film 3 covering the surface of the memory metal wire, and the memory metal wire 2 is spirally wound along the length direction of the stent body; in some embodiments, the memory metal wire 2 is preferably made of self-expanding memory titanium alloy, and the polymer film 3 is an organic polymer or polyether polyurethane material.
[0032] The outer diameters of the two ends of the stent body 1 are larger than the outer diameter of the middle part between the two ends, one end of which is a stopper 41, which is located in the human body when in use, which is conducive to preventing the stent from sliding; the stopper 41 is preferably cylindrical in the released state, and of course it can also be other shapes that are conducive to preventing sliding. Preferably, the inner side of the polymer film at the open end of the stopper 41 has a blunt and smooth design to prevent scratching the ureter, so as to reduce possible damage.
[0033] The other end of the support body 1 is a fixing portion 42, which is used to be connected to a urine-receiving ostomy bag so as to transport urine to the ostomy bag 12. Preferably, in the released state, the fixing portion 42 is trumpet-shaped, which is conducive to the smooth outflow of urine.
[0034] Preferably, in the released state, the outer diameters of the opening ends of the limiting portion 41 and the fixing portion 42 are 1.5-2.5 times, for example, twice, the outer diameter of the middle portion.
[0035] Preferably, in the released state, the stent body 1 has a length of 5-8 cm and a circumference of 12-36 Fr, where Fr is the circumference unit of the catheter, abbreviated as F, and 1F=circumference 1 mm.
[0036] In some embodiments, a positioning point may be further provided at the end of the stent body 1 so that it can be visualized under X-rays to facilitate positioning during surgery. The details are well known in the art and will not be described in detail here.
[0037] like Figure 2 As shown in Figures 2a and 2b, the urine collection assembly of the present invention comprises an ostomy bag 12 and the metal film-covered stent, wherein the ostomy bag comprises a chassis 11, and the fixing portion 42 of the metal film-covered stent is connected to the chassis 11 of the ostomy bag to transport urine into the ostomy bag 12. The ostomy bag 12 and its chassis 11 are well known in the art, the chassis of the ostomy bag is usually adhered to the skin around the stoma by gluing, and the chassis 12 of the ostomy bag is provided with a buckle ring 61 that is matched and buckled with the urine inlet port 13 of the ostomy bag, so that when in use, the ostomy bag can be buckled on the chassis 11 through its urine inlet port 13 to prevent urine leakage.
[0038] There can be many specific connection methods between the fixing portion 42 of the metal coated stent and the chassis 11 of the ostomy bag, which can be appropriately determined by those skilled in the art according to specific circumstances. In some embodiments, the open end of the fixing portion 42 is tied to the chassis 11 of the ostomy bag by medical sutures 51. In one embodiment, a plurality of evenly distributed fixing rings 6 are provided on the inner side of a buckle ring 61 on the chassis 11 for buckling with the urine inlet port 13 of the ostomy bag, and the fixing ring 6 is bound together with the fixing portion 42 of the metal coated stent by medical sutures 51; preferably, a plurality of fixing holes 5 corresponding to the position of the fixing ring 6 are provided on the open end of the fixing portion 42, and the fixing ring 6 is bound together with the fixing hole 5 by medical sutures 51.
[0039] When implanting a stent, Figure 3 As shown, the stent body 1 is connected to a stent release device 7, and the stent body 1 is located at the distal end of the operating end of the stent release device 7; the stent release device 7 is composed of a hollow operating rod 8, and the hollow operating rod 8 can allow a guide wire to pass through; the circumference of the operating rod is preferably 6-10F, and the circumference of the unreleased stent body is preferably 8-10F. The stent release device is composed of a hollow operating rod 8, a positioning plate 9 connected to the operating rod in a U shape, and a release sheath 10 wrapped around the stent body and the operating rod; a storage chamber for storing the stent body 1 is formed between the release sheath and the operating rod.
[0040] Directions:
[0041] Ultrasound is used to understand the thickness of the patient's abdominal wall, and then the appropriate metal coated stent model is selected. The ureteral indwelling guide wire is inserted into the inner hole of the operating rod, and the release device is inserted retrogradely along the guide wire. Under the guidance of X-rays, the upper and lower positioning points of the metal coated stent are made to span the entire abdominal wall. Under the positioning of the positioning disk, the outer sheath of the release sheath is pulled to release the stent body from the release sheath, and the two ends of the expanded diameter of the metal coated stent are respectively limited at the inner and outer ends of the abdominal wall.
[0042] After the bracket is installed, the bottom plate of the ostomy bag is pasted, and the fixed end of the metal coated bracket is connected to the bottom plate by medical sutures, and then the ostomy bag is buckled to form the urine collection assembly.
[0043] Obviously, the described embodiments are only some embodiments of the utility model, not all embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other.
Claims
1. A self-expanding metal-covered stent for ureterostomy. It is characterized in that The metal-coated stent includes a stent body that is dumbbell-shaped after release, and the stent body includes a wavy memory metal wire and a polymer film covering the surface of the memory metal wire, and the memory metal wire is spirally wound along the length direction of the stent body; the outer diameters at both ends of the stent body are larger than the outer diameter of the middle part between the two ends, one end is a limiting part, and the other end is a fixing part; the fixing part is used to connect to an ostomy bag for receiving urine.
2. The ureterostomy self-expanding metal-covered stent according to claim 1, It is characterized in that In the released state, the limiting portion is cylindrical and the fixing portion is trumpet-shaped.
3. The ureterostomy self-expanding metal-covered stent according to claim 1 or 2, It is characterized in that In the released state, the outer diameters of the opening ends of the limiting portion and the fixing portion are 1.5-2.5 times the outer diameter of the middle portion.
4. The ureterostomy self-expanding metal-covered stent according to claim 3, It is characterized in that In the released state, the length of the stent body is 5-8 cm and the circumference is 12-36F.
5. The ureterostomy self-expanding metal-covered stent according to claim 1, 2 or 4, It is characterized in that The inner side of the polymer film at the opening end of the limiting portion has a blunt and smooth design to prevent the ureter from being scratched.
6. A urine collection assembly, It is characterized in that It comprises an ostomy bag and a metal coated stent according to any one of claims 1 to 5, wherein the ostomy bag comprises a base plate, and a fixing portion of the metal coated stent is connected to the base plate of the ostomy bag to transport urine into the ostomy bag.
7. The urine collection assembly according to claim 6, It is characterized in that The open end of the fixing portion is tied to the bottom plate of the ostomy bag by medical sutures.
8. The urine collecting assembly according to claim 6 or 7, It is characterized in that A plurality of evenly distributed fixing rings are arranged on the inner side of the buckling ring on the chassis for buckling with the urine inlet interface of the ostomy bag, and the fixing rings are bound together with the fixing part of the metal coated stent by medical sutures.
9. The urine collection assembly according to claim 8, It is characterized in that A plurality of fixing holes corresponding to the positions of the fixing rings are arranged on the open end of the fixing part, and the fixing rings are bound together with the fixing holes by medical sutures.