A stent drainage tube for preventing rectal anastomotic leakage

Abstract

This utility model relates to a stent drainage tube for preventing leakage at the rectal anastomosis. The main body is a drainage conduit; the drainage conduit has an internal drainage channel; two anterior-posterior extending layers are formed within the conduit wall, serving as an irrigation channel and an inflation channel respectively; a circular balloon is fitted around the outer periphery of the drainage conduit, located behind the protective structure; a notch is provided in the outer wall of the drainage conduit, located inside the balloon and communicating with it. This invention solves the common problems of blockage, leakage, and dislodgement found in existing ordinary anal tube materials. It utilizes the balloon to open the rectal anastomosis while simultaneously serving as an irrigation and drainage structure, effectively improving the patient's quality of life during postoperative recovery and reducing the incidence of complications such as anastomotic leakage, bleeding, and decreased anal function.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, and in particular to a stent drainage tube for preventing leakage at rectal anastomosis. Background Technology

[0002] Rectal cancer is a relatively common malignant tumor of the digestive tract in my country. Currently, clinicians still consider surgical intervention as the first-line treatment for rectal cancer. After radical tumor resection, both doctors and patients urgently hope to reduce postoperative complications and significantly improve the patient's postoperative quality of life. The widespread use of total mesorectal excision (TME) in low rectal cancer can effectively reduce the proportion of abdominoperineal surgery in radical rectal cancer resection, preserve anal function, and thus significantly improve the patient's quality of life. However, it may also increase the incidence of postoperative complications such as anastomotic leakage, bleeding, and decreased anal function. Currently, placing a drainage tube through the anus into the rectal cavity and keeping the drainage tube patent to reduce pressure on the rectal anastomosis is the main management method to reduce anastomotic complications after TME.

[0003] However, the common anal canal materials used in clinical practice generally have drawbacks such as being prone to blockage, leakage, and prolapse, lacking local irrigation function, and not being completely isolated from feces at the anastomosis site. In some cases, they can even cause serious consequences such as anastomotic leakage due to poor drainage. Utility Model Content

[0004] The purpose of this invention is to provide a stent drainage tube for preventing leakage at the rectal anastomosis, which can solve the problems of easy blockage, easy leakage, easy dislodgement, lack of local flushing function, and incomplete isolation between the anastomosis and feces that are commonly used in clinical practice.

[0005] This utility model is achieved through the following technical solution: a stent drainage tube for preventing leakage at rectal anastomosis, the main body of which is a drainage conduit, and a drainage device is provided at the rear end of the drainage conduit; a protective structure is provided at the front end of the drainage conduit, and a connector is provided at the rear end of the drainage conduit, the connector being used to connect with the drainage device.

[0006] The drainage conduit has a drainage channel inside; the wall of the drainage conduit has two interlayers extending forward and backward as a flushing channel and an air-filling channel respectively. The front end of the flushing channel extends to the front end of the drainage conduit to form a flushing port, and the rear end of the flushing channel is connected to a flushing channel connector through a hose.

[0007] The drainage conduit is fitted with a circular balloon around its outer periphery, and the balloon is located on the rear side of the protective structure; the outer wall of the drainage conduit has a notch, which is located inside the balloon and communicates with the balloon; the rear end of the inflation channel is connected to an inflation cylinder via a flexible tube.

[0008] The drainage catheter is also slidably connected to a limiter, which is located on the posterior side of the balloon.

[0009] Compared with previous technologies, the beneficial effects of this utility model are as follows:

[0010] 1. This utility model can solve the common problems of blockage, leakage and prolapse of existing ordinary anal canal materials. It can use a balloon to open the rectal anastomosis while also having a flushing and drainage structure, which can drain sewage after flushing, effectively improve the quality of life of patients during postoperative recovery, and reduce the incidence of related complications such as anastomotic leakage, bleeding and reduced anal function.

[0011] 2. This utility model has multiple reinforcing ribs regularly arranged inside the wall of the drainage catheter to improve the strength of the entire drainage catheter, which can effectively prevent deformation, thereby maintaining the ability to open the rectal anastomosis and maintain excellent drainage capacity. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the drainage catheter.

[0013] Figure 2 This is a schematic diagram of the notch and balloon structure;

[0014] Figure 3 This is a schematic diagram of a partial cross-section of the drainage catheter;

[0015] Figure 4 This is a diagram illustrating the connection between the drainage catheter and the rectal anastomosis.

[0016] Figure 5 This is a schematic diagram of the drainage device.

[0017] Labeling Explanation: 1 Drainage tube, 11 Protective structure, 12 Connector, 13 Drainage channel, 131 Annular metal ring, 14 Flushing channel, 141 Flushing channel connector, 15 Inflation channel, 151 Notch, 152 Balloon, 153 Inflation cylinder, 16 Limiter, 2 Drainage device, 21 Connector, 22 First drainage tube, 23 Drainage balloon, 24 Second drainage tube, 25 Drainage bag, 3 Tube. Detailed Implementation

[0018] The present invention will now be described in detail with reference to the accompanying drawings, but the scope of protection of the present invention is not limited to the following description:

[0019] like Figures 1 to 5As shown, a stent drainage tube for preventing rectal anastomotic leakage has a main body of a drainage conduit 1, and a drainage device 2 is provided at the rear end of the drainage conduit 1; a protective structure 11 is provided at the front end of the drainage conduit 1, and a connector 12 is provided at the rear end of the drainage conduit 1, which is used to connect with the drainage device 2.

[0020] The drainage conduit 1 has a drainage channel 13 inside; the drainage conduit 1 has two interlayers extending in the front and back direction, which serve as a flushing channel 14 and an air filling channel 15 respectively. The front end of the flushing channel 14 extends to the front end of the drainage conduit 1 to form a flushing port, and the rear end of the flushing channel 14 is connected to a flushing channel connector 141 through a hose 3.

[0021] The drainage conduit 1 is fitted with a circular balloon 152 on its outer periphery, and the balloon 152 is located on the rear side of the protective structure 11; the outer wall of the drainage conduit 1 is provided with a notch 151, which is located inside the balloon 152 and communicates with the balloon 152; the rear end of the inflation channel 15 is connected to an inflation cylinder 153 through a flexible tube 3.

[0022] A limiter 16 is slidably connected to the outer periphery of the drainage catheter 1, and the limiter 16 is located on the posterior side of the balloon 152. This invention solves the common problems of blockage, leakage, and dislodgement found in existing ordinary anal tube materials. It utilizes the balloon 152 to open the rectal anastomosis while also providing irrigation and drainage functions. The entire device has good stability, smooth drainage, and is safe and reliable to use.

[0023] It should be noted that the balloon 152 is fixedly connected to the tube segment at the notch 151 on the drainage catheter 1, and is used to open the rectal anastomosis during use, with the specific effect as follows: Figure 4 As shown, this design reduces pressure at the rectal anastomosis, thereby decreasing the probability of rectal anastomosis complications after TME surgery. The inflator 153 can both inflate and deflate, allowing for variations in balloon size to suit different patients' needs. When fully inflated, the balloon 153 opens the rectal anastomosis and is fixed within the rectum. When deflated, the balloon 153's position is not fixed, allowing for the entire device to be retrieved. The limiting device 16 serves to maintain the relative position of the entire device. Its position is adjusted and fixed to the anal skin with sutures, preventing the drainage catheter 1 from being pulled or dislodged after inflation.

[0024] Furthermore, the diameter of the limiter 16 is the same as the outer diameter of the drainage conduit 1, and the outer diameter of the connector 12 is larger than the diameter of the limiter 16.

[0025] The limiter 16 is connected to the drainage catheter 1 via a threaded structure. This structural design can prevent the limiter 16 from dislodging from the drainage catheter 1 due to misoperation during the operation.

[0026] Furthermore, the connector 12 is a tower-shaped connector. The tower-shaped connector has better airtightness and is also very convenient to assemble and disassemble.

[0027] Furthermore, the inflation cylinder 153 is provided with an inflation volume scale. The scale allows for more controllable inflation volume of the balloon. Different patients may require different balloon sizes, and the scale allows this invention to be adapted to a wider range of patients.

[0028] Furthermore, the protective structure 11 is a blunt tip formed by passivation treatment of the front end of the drainage catheter 1. Passivation treatment can prevent the front end of the drainage catheter 1 from piercing the mucosal tissue in the patient's rectum due to sharpness, thus avoiding unnecessary surgical damage.

[0029] Furthermore, the drainage conduit 1 is also provided with several annular metal rings 131 inside the conduit wall to enhance its strength. The structural design of the annular metal rings 131 can improve the strength of the drainage conduit 1. Since this structural design is a conventional technical means, it will not be described in detail.

[0030] Furthermore, the drainage device 2 includes a socket 21, a first drainage tube 22, a drainage balloon 23, a second drainage tube 24, and a drainage bag 25 connected sequentially from front to back;

[0031] The sleeve 21 and the connector 12 are connected in a detachable, sealed manner. It should be noted that in the drainage device 2, pressing and releasing the drainage balloon 23 allows the waste inside the drainage tube to be drawn out and collected into the drainage bag 25. The detachable, sealed connection is a conventional technique, meaning that the sleeve 21 has several sealing rings inside to improve sealing.

[0032] In summary, the method of using this utility model is as follows:

[0033] The drainage catheter 1 is inserted into the rectal cavity at a predetermined position. Then, the balloon 153 is inflated by the graduated air cylinder 153. The limiter 16 is adjusted and fixed to the anal skin with sutures. This allows the balloon 153 of this invention to open the rectal anastomosis while the drainage device 2 and the drainage catheter 1 work together to allow feces and other waste in the rectum to be drained out through the drainage channel 13 in the drainage catheter 1 to the drainage bag 25 in the drainage device 2. This allows the feces and other waste to be drained to the outside, creating conditions for the healing of the rectal anastomosis. At the same time, it can also reduce the absorption of toxins and the resulting systemic poisoning symptoms.

[0034] It should be noted that the flushing channel 14 on the drainage catheter 1 can be connected to an external flushing device to flush the rectal cavity. After flushing, the tower-shaped connector of the catheter is connected to the drainage device 2. Pressing the drainage balloon 23 can draw the flushing fluid in the rectal cavity into the drainage bag.

[0035] Finally, after the surgery, the catheter needs to be removed. First, the sutures of the limiter are removed, and then the gas in the balloon needs to be aspirated through a graduated syringe before the catheter is pulled out of the rectal cavity.

[0036] Although this utility model has been illustrated and described using specific embodiments and alternative methods, it should be understood that various changes and modifications are permitted as long as they do not depart from the spirit and scope of this utility model. Therefore, it should be understood that this utility model is not limited in any sense except by the appended claims and their equivalents.

Claims

1. A stent drainage tube for preventing anastomotic leakage of rectum, characterized in that: The main body is a drainage conduit (1), and a drainage device (2) is provided at the rear end of the drainage conduit (1); a protective structure (11) is provided at the front end of the drainage conduit (1), and a connector (12) is provided at the rear end of the drainage conduit (1). The connector (12) is used to connect with the drainage device (2). The drainage conduit (1) has a drainage channel (13) inside; the drainage conduit (1) has two interlayers extending in the front and back direction, which serve as a flushing channel (14) and an air filling channel (15) respectively. The front end of the flushing channel (14) extends to the front end of the drainage conduit (1) to form a flushing port. The rear end of the flushing channel (14) is connected to a flushing channel connector (141) through a hose (3). The drainage conduit (1) is fitted with a circular balloon (152) on its outer periphery, and the balloon (152) is located on the rear side of the protective structure (11); the outer wall of the drainage conduit (1) is provided with a notch (151), which is located inside the balloon (152) and communicates with the balloon (152); the rear end of the inflation channel (15) is connected to an inflation cylinder (153) through a hose (3). The drainage catheter (1) is also slidably connected to a limiter (16) on its outer periphery, and the limiter (16) is located on the rear side of the balloon (152).

2. The stent drainage tube for preventing anastomotic leakage of rectal anastomosis according to claim 1, characterized in that: The diameter of the limiter (16) is the same as the outer diameter of the drainage conduit (1), and the outer diameter of the connector (12) is larger than the diameter of the limiter (16). The limiter (16) is connected to the drainage conduit (1) by a threaded structure.

3. The stent drainage tube for preventing anastomotic leakage of rectal anastomosis according to claim 1, characterized in that: The connector (12) is a tower-shaped connector.

4. The stent drainage tube for preventing anastomotic leakage of rectal anastomosis according to claim 1, characterized in that: The air cylinder (153) is provided with an air volume scale.

5. The stent drainage tube for preventing anastomotic leakage of rectal anastomosis according to claim 1, characterized in that: The protective structure (11) is a blunt tip formed by passivation treatment of the front end of the drainage catheter (1).

6. The stent drainage tube for preventing anastomotic leakage of rectal anastomosis according to claim 1, characterized in that: The drainage conduit (1) is also provided with several annular metal rings (131) inside the conduit wall to enhance the strength of the drainage conduit (1).

7. The stent drainage tube for preventing anastomotic leakage of rectal anastomosis according to claim 1, characterized in that: The drainage device (2) includes a socket (21), a first drainage tube (22), a drainage balloon (23), a second drainage tube (24), and a drainage bag (25) connected sequentially from front to back. The socket (21) and the connector (12) are connected in a split-type sealed connection.

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