Bladder fistulization tube, fistulization tube assembly and fistulization drainage device

Abstract

The utility model relates to a bladder fistulization tube, a fistulization tube assembly and a fistulization drainage device. The bladder fistula comprises an outer sheath, wherein one end of the outer sheath is connected with an elastic sleeve; a plurality of filter holes are formed in the side wall of the elastic sleeve, one end of the elastic sleeve is communicated with the outer sheath, and the other end of the elastic sleeve is a closed part; the shape of the elastic sleeve can be elastically changed after being subjected to external force, the diameter of the initial shape of the elastic sleeve before elastic change is larger than the outer diameter of the outer sheath, and the diameter of the stretched shape of the elastic sleeve after elastic change is smaller than or equal to the outer diameter of the outer sheath; the initial shape of the elastic sleeve is used for preventing the fistulization tube from falling off from the puncture opening. The bladder fistulization tube is convenient to use, the fistulization tube can be stably limited in a puncture opening of a patient through the elastic sleeve, stability is enhanced, and the fistulization tube is prevented from being disengaged. The filtering holes in the elastic sleeve can be used for filtering and blocking tissue fragments after the prostate is cut off, so that the tissue fragments are prevented from being discharged out of the body from the fistulization tube.

Description

Technical Field

[0001] This utility model relates to the field of bladder fistula technology, and in particular to a bladder fistula tube, a fistula tube assembly, and a fistula drainage device. Background Technology

[0002] A cystostomy device is a medical instrument that inserts a catheter into a patient's bladder to drain urine from the bladder. Most existing cystostomy catheters are single-function, simple in construction, and predominantly long, straight tubes. During prostatectomy, traditional cystostomy catheters are inserted directly into the puncture site in the patient's abdomen. Due to the lack of supporting structures, this makes them very unstable and prone to dislodgement. Furthermore, there is a risk that fragments of the removed prostate tissue may block the catheter or leak out with the drainage fluid, hindering the collection and study of these tissue fragments. Utility Model Content

[0003] Therefore, it is necessary to provide a bladder catheter, catheter assembly, and drainage device to address the problem of traditional bladder catheters being prone to dislodgement and displacement during use.

[0004] A bladder stoma tube includes an outer sheath, one end of which is connected to an elastic sleeve; the sidewall of the elastic sleeve has multiple filter holes, one end of the elastic sleeve communicates with the outer sheath, and the other end is configured as a closed portion; the shape of the elastic sleeve can elastically change under external force, wherein the diameter of the initial shape of the elastic sleeve before elastic change is larger than the outer diameter of the outer sheath, and the diameter of the stretched shape of the elastic sleeve after elastic change is less than or equal to the outer diameter of the outer sheath; the initial shape of the elastic sleeve is used to prevent the stoma tube from falling out of the puncture site.

[0005] As a preferred example, the filter pores are circular or elongated.

[0006] As a preferred example, the elastic sleeve has a conical shape when stretched, and the bottom surface of the elastic sleeve is connected to the outer sheath, with the apex being a closed portion.

[0007] As a preferred example, the outer sheath is made of rigid plastic.

[0008] As a preferred example, the end of the outer sheath away from the elastic sleeve is provided with an external thread for connection.

[0009] A bladder stent assembly includes a bladder stent and a mandrel as described above; the mandrel is used to extend into the outer sheath and push the elastic sleeve from an initial shape to a stretched shape.

[0010] As a preferred example, one end of the top core rod is connected to an internal thread cap that matches the external thread portion. When the internal thread cap is connected to the external thread portion, the top core rod pushes the elastic sleeve into a stretched shape.

[0011] As a preferred example, the top core rod is made of hard plastic or hard metal.

[0012] A stoma drainage device, comprising:

[0013] The bladder stoma tube as described above;

[0014] A drainage tube that can be detachably connected to the end of the outer sheath away from the elastic sleeve;

[0015] A collection bag connected to the end of the drainage tube furthest from the outer sheath.

[0016] As a preferred embodiment, an anti-overflow structure is provided between the drainage tube and the outer sheath, the anti-overflow structure comprising:

[0017] A soft valve is located on the inner wall of the outer sheath near the drainage tube, and the soft valve is used to close the channel inside the outer sheath;

[0018] A connecting tube is disposed on the inner side wall of the end of the drainage tube near the outer sheath, and the connecting tube is connected to the drainage tube. The connecting tube is used to open the soft valve when the drainage tube is fixed to the outer sheath, so that the channel inside the outer sheath is connected to the drainage tube.

[0019] The beneficial effects of this utility model are as follows:

[0020] 1. Compared with the existing long straight tube design, the bladder stoma tube provided by this utility model is more convenient to use. At the same time, the elastic sleeve can stably limit the stoma tube in the patient's puncture site, enhance stability and prevent the stoma tube from falling out.

[0021] 2. This invention uses a filter on the elastic sleeve to filter and block tissue fragments removed from the prostate, while allowing urine to pass through normally, preventing tissue fragments from being discharged from the stoma. These tissue fragments will later need to be removed from the body using other internal instruments for further research and analysis.

[0022] 3. The fistula drainage device provided by this utility model can drain the fluid in the bladder out of the body, replacing the function of surgical instruments in transurethral surgery, while the external collection bag keeps the surgical area from being contaminated. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the stoma tube structure with the elastic sleeve in its initial shape in the embodiment;

[0024] Figure 2 This is a schematic diagram of a stoma tube structure in the embodiment where the elastic sleeve is in a stretched shape;

[0025] Figure 3 This is a schematic diagram of a fistula tube structure with different filter hole shapes in another embodiment;

[0026] Figure 4 A schematic diagram of a stoma tube structure with two elastic sleeves in another embodiment;

[0027] Figure 5 This is a schematic diagram of the top core rod.

[0028] Figure 6 This is a schematic diagram of the fistula drainage device proposed in one embodiment;

[0029] Figure 7 This is a schematic diagram of a soft valve in different states.

[0030] In the diagram: outer sheath 1, elastic sleeve 2, filter hole 21, sealing part 22, top core rod 3, internal thread cap 4, drainage tube 5, collection bag 6, soft valve 7, connecting tube 8. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] It should be noted that when a component is said to be "installed on" another component, it can be directly on the other component or it may be in a component that is centered on it. When a component is said to be "set on" another component, it can be directly set on the other component or it may also be in a component that is centered on it. When a component is said to be "fixed to" another component, it can be directly fixed to the other component or it may also be in a component that is centered on it.

[0033] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "or / and" as used herein includes any and all combinations of one or more of the associated listed items.

[0035] Example 1

[0036] This embodiment provides a bladder stoma tube, comprising an outer sheath 1 and an elastic sleeve 2. The outer sheath 1 adopts a conventional long straight tube design. The difference lies in the specially designed elastic sleeve 2. Multiple evenly distributed circular filter holes 21 are formed on the side wall of the elastic sleeve 2. One end of the elastic sleeve 2 is open, the size of which matches the size of one end of the outer sheath 1, and the elastic sleeve 2 is fixedly connected to the end of the outer sheath 1. The other end of the elastic sleeve 2 is configured as a closed portion 22. This closed portion 22 needs to coincide with the axis of the outer sheath 1 to ensure that the core rod 3 extending from inside the outer sheath 1 can abut against the closed portion 22. It should be noted that the shape of the elastic sleeve 2 can elastically change. That is, the elastic sleeve 2 deforms under external force. When the external force is removed, the elastic sleeve 2 can return to its original shape and size. This can be achieved using materials such as modified rubber or silicone. For this embodiment, please refer to [reference needed]. Figure 1 The elastic sheath 2, before its elastic change, has an initial shape of a flattened spherical capsule, and its initial outer diameter must be larger than the outer diameter of the outer sheath 1. During use, the elastic sheath 2 is placed inside the patient's bladder. The diameter of the elastic sheath 2 after returning to its initial shape is larger than the diameter of the puncture site, thus preventing the stoma tube from dislodging from the abdominal puncture site. After its elastic change, the stretched shape of the elastic sheath 2 is conical, such as... Figure 2 As shown. Its conical apex is the closed portion 22, while the bottom portion connects to the end of the outer sheath 1. The diameter of this stretched shape must be less than or equal to the outer diameter of the outer sheath 1, allowing the elastic sleeve 2 to easily pass through the puncture site in the patient's abdomen. The entire cystostomy tube can be made of existing medical materials, only requiring assurance of the rigidity of the outer sheath 1 (such as existing cystostomy tube materials) and the elastic adaptability of the elastic sleeve 2 (such as silicone, rubber, etc.). It is designed for single use, ensuring cleanliness and hygiene.

[0037] Compared to existing long, straight tube designs, the cystostomy tube provided by this invention is more convenient to use. The elastic sleeve 2 stably confines the tube within the patient's puncture site, enhancing stability and preventing dislodgement. The filter holes 21 on the elastic sleeve 2 filter out tissue fragments removed from the prostate, while allowing urine to pass normally, preventing tissue fragments from being discharged from the tube. These tissue fragments will later need to be removed from the body using other intracavitary instruments for further research and analysis.

[0038] In other embodiments, the other structures are the same as those in the embodiments described above, and the shape of the filter pore 21 is not limited to a circle, such as... Figure 3 As shown, it can also be configured as a long strip. The long strip filter holes 21 are distributed along the length of the outer sheath 1 on the elastic sleeve 2, which are also used to allow urine in the bladder to pass through, while filtering tissue fragments after excision.

[0039] In another embodiment, based on the cystostomy tube proposed in the above embodiments, one segment of its outer sheath 1 can be replaced with an elastic sleeve 2. For example... Figure 4 As shown, the bottom end of the elastic sleeve 2 at the bottom of the outer sheath 1 is a closed portion 22. The upper elastic sleeve 2 also has an elastic changeability, and its initial diameter is larger than the outer diameter of the outer sheath 1. The difference between it and the bottom elastic sleeve 2 is that both sides of the upper elastic sleeve 2 are connected to and fixedly connected to the outer sheath 1. Thus, when the bladder catheter is placed, the elastic tube clamps the patient's abdomen in its initial shape. That is, the lower elastic sleeve 2 is located inside the patient's bladder, and the upper elastic sleeve 2 is located outside the patient's abdomen. The elastic sleeve 2 further fixes the catheter and enhances its stability by providing additional support to the outside of the patient's abdomen. In all the above embodiments, the end of the outer sheath 1 away from the elastic sleeve 2 may also be provided with an external thread, which can easily connect other components, such as the top core rod 3, drainage tube 5, etc.

[0040] Example 2

[0041] Based on the cystostomy tube described in the above embodiments, this embodiment provides a cystostomy tube assembly, which includes a cystostomy tube and a mandrel 3 used in conjunction with it. The cystostomy tube can be any of the above embodiments. The mandrel 3 is designed to be adapted: its diameter is smaller than the inner diameter of the outer sheath 1; its length is greater than or equal to the length of the elastic sleeve 2 under the stretched shape of the outer sheath 1. The mandrel 3 is used to extend into the outer sheath 1 and push the elastic sleeve 2 from its initial shape to its stretched shape. The end of the mandrel 3 is rounded to ensure that it will not pierce the closed portion 22 of the elastic sleeve 2. At the same time, the mandrel 3 can provide sufficient support force to ensure that it can push the elastic sleeve 2 from its initial shape to its stretched shape.

[0042] In use, the top core rod 3 can be directly manipulated by hand to push it and straighten the elastic sleeve 2. In some embodiments, the end of the outer sheath 1 is provided with an external thread. One end of the top core rod 3 may be provided with an internal thread cap 4 that matches the external thread, such as... Figure 5As shown, the core rod 3 is fixed to the outer sheath 1 by connecting the internal thread cap 4 to the external thread. When the internal thread cap 4 and the external thread are in place, the core rod 3 pushes the elastic sleeve 2 into a stretched shape, which facilitates the use and operation of the stoma tube. On the other hand, the core rod 3 can be made of hard plastic for a disposable design, or hard metal such as aluminum alloy or stainless steel, ensuring that the core rod 3 has sufficient strength while also being reusable after cleaning and disinfection.

[0043] Example 3

[0044] This embodiment provides a cystostomy drainage device. It includes the cystostomy tube proposed in Embodiment 1, a drainage tube 5 detachably connected to the end of the outer sheath 1 away from the elastic sleeve 2, and a collection bag 6 connected to the end of the drainage tube 5 away from the outer sheath 1. Figure 6 As shown, one end of the drainage tube 5 is connected to the collection bag 6, and the other end is connected to the end of the outer sheath 1 via threads, for collecting urine or flushing fluid from the patient's bladder. An anti-overflow structure can also be provided at the connection between the drainage tube 5 and the outer sheath 1. Figure 7 As shown, the overflow relief structure includes a flexible valve 7 and a connecting tube 8. The flexible valve 7 is located on the inner wall of the outer sheath 1 near the drainage tube 5 and is made of an elastic material. In this embodiment, the flexible valve 7 is cross-shaped. Under normal conditions, the four petals of the flexible valve 7 are in contact with each other, forming a complete circle, which serves to seal the channel inside the outer sheath 1. The connecting tube 8 is fixed to the inner wall of the drainage tube 5 near the outer sheath 1. The connecting tube 8 communicates with the internal channel of the drainage tube 5. When the drainage tube 5 is fixed to the outer sheath 1 by threads, the connecting tube 8 can extend into the outer sheath 1 and pierce the flexible valve 7, thus closing the flexible valve 7 (in its closed state). Figure 7 The shape of 'a' in the middle is changed to a cross-shaped opening. Figure 7 (shape b in the diagram). At this time, the outer sheath 1 is connected to the drainage tube 5 via the connecting tube 8. At the moment the stoma tube is inserted, the fluid in the bladder will rush into the outer sheath 1 due to internal pressure and flow out at the other end of the outer sheath 1, easily contaminating the surgical area. The advantage of designing an anti-overflow structure is that the soft valve 7 can immediately block the overflow of fluid from the bladder, keeping the surgical area uncontaminated. Simultaneously, the drainage tube 5 can be directly connected to the outer sheath 1 to complete the connection to the collection bag 6, making it quick and convenient to use.

[0045] During transurethral resection of the prostate (TURP), a small-diameter electroresection endoscope is used in conjunction with the procedure. The device proposed in this invention replaces the traditional electroresection endoscope's water drainage function, enabling transurethral surgery to be performed in patients with narrow urethras, urethral strictures, or pediatric urethras.

[0046] In transurethral surgery for patients with narrow urethras, urethral strictures, or pediatric urethras, to reduce the diameter of the electrocautery scope and meet surgical requirements, we removed the traditional water-exit sheath 1, leaving only the water inlet channel, and used the device proposed in this invention to replace the water outlet function. Preoperatively, the mandrel 3 is inserted into the stoma tube sheath 1 and the straightening elastic sleeve 2 is fixed. After puncture into the bladder, the mandrel 3 is withdrawn, leaving the sheath 1 for water outlet. After rotating and fixing the drainage tube 5 to the threaded part on the sheath 1 and connecting the collection bag 6, the transurethral surgery can begin normally. This allows for the smooth performance of transurethral surgery for patients with narrow urethras, urethral strictures, or pediatric urethras.

[0047] The working principle of this invention is as follows: The top core rod 3 is inserted into the outer sheath 1 and fixed by the thread at the end. At this time, the elastic sleeve 2 is stretched from its initial shape to an extended shape by the top core rod 3. The stoma tube, which maintains its extended shape, is inserted into the patient's bladder, and then the top core rod 3 is removed. The elastic sleeve 2 located in the bladder returns to its initial shape after losing support, which prevents the stoma tube from dislodging. After the stoma tube is installed, the collection bag 6, drainage tube 5, and outer sheath 1 are connected in sequence. While the drainage tube 5 is connected to the outer sheath 1 by the thread at the end, the connecting tube 8 passes through the soft valve 7, so that the fluid in the bladder enters the collection bag 6 in sequence through the outer sheath 1 and the drainage tube 5, completing the drainage and collection of the fluid in the bladder and preventing the fluid from leaking out of the body and contaminating the surgical area.

[0048] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0049] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A bladder stoma tube, characterized in that, The device includes an outer sheath (1), one end of which is connected to an elastic sleeve (2); the sidewall of the elastic sleeve (2) is provided with multiple filter holes (21); one end of the elastic sleeve (2) is connected to the outer sheath (1), and the other end is set as a closed part (22); the shape of the elastic sleeve (2) can be elastically changed after being subjected to external force, wherein the diameter of the initial shape of the elastic sleeve (2) before elastic change is larger than the outer diameter of the outer sheath (1), and the diameter of the stretched shape of the elastic sleeve (2) after elastic change is less than or equal to the outer diameter of the outer sheath (1); the initial shape of the elastic sleeve (2) is used to prevent the stoma tube from falling out of the puncture site.

2. The bladder stoma tube according to claim 1, characterized in that, The filter hole (21) is circular or elongated.

3. The bladder stoma tube according to claim 1, characterized in that, The elastic sleeve (2) has a conical shape when stretched, and the bottom surface of the elastic sleeve (2) is connected to the outer sheath (1), with the apex being the closed part (22).

4. The bladder stoma tube according to claim 1, characterized in that, The outer sheath (1) is made of hard plastic.

5. The bladder stoma tube according to claim 1, characterized in that, The outer sheath (1) is provided with an external thread at the end away from the elastic sleeve (2) for connecting purposes.

6. A fistula tube assembly, characterized in that, It includes a bladder stent tube and a core rod (3) as described in any one of claims 1 to 5; the core rod (3) is used to extend into the outer sheath (1) and push the elastic sleeve (2) from its initial shape to its stretched shape.

7. The stoma tube assembly according to claim 6, characterized in that, One end of the top core rod (3) is connected to an internal thread cap (4) that matches the external thread. When the internal thread cap (4) is connected to the external thread, the top core rod (3) pushes the elastic sleeve (2) into a stretched shape.

8. The stoma tube assembly according to claim 6, characterized in that, The top core rod (3) is made of hard plastic or hard metal.

9. A fistula drainage device, characterized in that, include: The bladder stoma tube as described in any one of claims 1 to 5; A drainage tube (5) is detachably connected to the end of the outer sheath (1) away from the elastic sleeve (2); A collection bag (6) is connected to the end of the drainage tube (5) away from the outer sheath (1).

10. The stoma drainage device according to claim 9, characterized in that, An anti-overflow structure is provided between the drainage tube (5) and the outer sheath (1), the anti-overflow structure comprising: A soft valve (7) is provided on the inner wall of the outer sheath (1) near the drainage tube (5), and the soft valve (7) is used to close the channel inside the outer sheath (1); A connecting tube (8) is disposed on the inner side wall of the end of the drainage tube (5) near the outer sheath (1), and the connecting tube (8) is connected to the drainage tube (5). The connecting tube (8) is used to open the soft valve (7) when the drainage tube (5) is fixed to the outer sheath (1), so that the channel inside the outer sheath (1) is connected to the drainage tube (5).

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