Thread hanging appliance for high anal fistula

Abstract

The utility model provides a thread hanging appliance for high anal fistula. The thread hanging appliance comprises a catheter, an elastic thread and a guide rod. The guide rod is arranged in the guide pipe in a penetrating manner; the guide pipe is provided with an insertion opening and a retreating opening which are close to the two opposite ends of the hose respectively. The elastic thread is connected with the guide pipe and is close to the withdrawing opening. According to the thread hanging device for the high anal fistula, the fistula tract and the inner opening are probed through the guide rod, the guide rod serves as a track for pushing the catheter, and the catheter can easily reach the inner opening. By means of the soft characteristic of the catheter, direction conversion can be easily achieved through the instrument so that the catheter can penetrate out of the anus smoothly, the intestinal canal of a patient is not prone to being damaged, the operation process is faster and safer, and the body burden and psychological pain of the patient can be relieved.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to a seton device for high-level anal fistula. Background Technology

[0002] An anal fistula, also known as a rectal fistula, is an abnormal pathological channel that forms between the rectum or anal canal and the perianal skin. The main symptoms are recurrent purulent, bloody, or mucous discharge from the fistula opening, accompanied by anal pain. Severe cases may present with systemic infection symptoms such as fever and chills. Pain significantly intensifies when the external opening closes, abscesses accumulate within the fistula, and drainage is obstructed. Anal fistulas not only cause patients to suffer from recurrent infections, purulent discharge, bleeding, and the formation of branch fistulas, but also involve acute infection symptoms such as perianal swelling and pain, and fever. Furthermore, they pose a potential risk of malignant transformation, making them a serious condition requiring early medical intervention.

[0003] One of the conventional treatments for anal fistula is seton placement. This method involves using a probe to precisely locate the fistula tract, then cleverly inserting a rubber band. The rubber band's mechanical tension gradually obstructs blood circulation in the ligated area, inducing progressive pressure necrosis and achieving chronic transection of the fistula. In practice, a ball-headed probe is typically inserted from the external opening of the fistula inwards. Once the internal opening is clear, the probe is pulled out and secured with a rubber band. The probe is then pulled back out through the fistula tract, thus inserting the rubber band into the fistula itself.

[0004] For low-lying anal fistulas, the fistula tract is located deep below the external anal sphincter, with the internal opening close to the anus and the fistula tract relatively short. When probing with a probe, the probe can be easily bent and deformed according to the direction of the fistula tract to pass through the internal opening and then turn to exit through the anus. However, for high-lying anal fistulas, because the fistula tract is located deep above the external anal sphincter, with the internal opening far from the anus and the fistula tract relatively long, it is difficult for the probe to turn after passing through the internal opening when probing with a probe. It is necessary to repeatedly pull the probe with an anoscope and surgical forceps, which can easily damage the intestinal tract and increase the patient's pain. Utility Model Content

[0005] This application provides a seton device for high-level anal fistula, including a catheter, an elastic thread, and a guide rod;

[0006] The conduit is a hollow flexible tube, and the guide rod is inserted through the conduit;

[0007] The catheter has an insertion port and an exit port, which are located near opposite ends of the flexible tube, respectively.

[0008] The elastic cord is connected to the conduit, and the elastic cord is close to the exit port.

[0009] In one possible implementation, the suture device for high anal fistula provided in this application embodiment has the insertion port being the opening of one end of the catheter.

[0010] In one possible implementation, the suture device for high anal fistula provided in this application embodiment has an opening on the side wall of the catheter, which forms the exit port.

[0011] In one possible implementation, the hanging device for high anal fistula provided in this application embodiment has the elastic thread connected to the side wall of the catheter.

[0012] In one possible implementation, the hanging device for high anal fistula provided in this application embodiment has the elastic thread inserted into the catheter through the opening at one of the other ends of the catheter, and then wrapped around to form a limiting knot after exiting through the exit port.

[0013] In one possible implementation, the hanging device for high anal fistula provided in this application embodiment has a connecting hole on the side wall of the catheter, and one end of the elastic cord forms a collar, which is inserted into the connecting hole.

[0014] In one possible implementation, the hanging device for high anal fistula provided in this application embodiment has the collar formed by binding a line segment near one end of the elastic line.

[0015] In one possible implementation, the hanging device for high anal fistula provided in this application embodiment has a rounded head at one end of the guide rod.

[0016] In one possible implementation, the hanging device for high anal fistula provided in this application embodiment has graduation lines on the outer wall of the catheter.

[0017] In one possible implementation, the seton device for high anal fistula provided in this application embodiment has the exit port being the opening of the other end of the catheter.

[0018] In one possible implementation, the seton device for high anal fistula provided in this application embodiment has a catheter made of flexible plastic and a guide rod made of metal.

[0019] Beneficial effects: The seton device for high anal fistulas provided in this application uses a guide rod to explore the fistula tract and internal opening, and the guide rod serves as a track for the catheter, allowing the catheter to easily reach the internal opening. Utilizing the soft nature of the catheter, the device can easily change direction to smoothly pass through the anus, minimizing damage to the patient's intestines, making the surgical procedure faster and safer, and reducing the patient's physical burden and psychological distress. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of the seton device for high-level anal fistula according to an embodiment of this application;

[0022] Figure 2 This is an exploded schematic diagram of a seton device for high-level anal fistula according to an embodiment of this application;

[0023] Figure 3 This is a schematic diagram of the connection between the conduit and the elastic cord.

[0024] Explanation of reference numerals in the attached figures

[0025] 10-Catheter;

[0026] 11-Insert port;

[0027] 12-Exit point;

[0028] 20-Elastic thread;

[0029] 21-Ring toss;

[0030] 22-Limit line knot;

[0031] 30-Guide rod;

[0032] 31-Round head. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The described embodiments are some, but not all, of the embodiments of this application. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0034] One of the conventional treatments for anal fistula is seton placement. This method involves using a probe to precisely locate the fistula tract, then cleverly inserting a rubber band. The rubber band's mechanical tension gradually obstructs blood circulation in the ligated area, inducing progressive pressure necrosis and achieving chronic transection of the fistula. In practice, a ball-headed probe is typically inserted from the external opening of the fistula inwards. Once the internal opening is clear, the probe is pulled out and secured with a rubber band. The probe is then pulled back out through the fistula tract, thus inserting the rubber band into the fistula itself.

[0035] When discussing seton placement strategies for anal fistulas, in the case of low-lying anal fistulas, the fistula tract is characteristically located deep below the external anal sphincter, with the internal opening close to the anus and the fistula tract relatively short and shallow. During precise exploration using a probe, the operator can flexibly apply appropriate bending and adjustment to the probe according to the natural direction of the fistula tract, ensuring that the probe can smoothly pass through the internal opening, then smoothly turn and finally exit through the anus. This process is relatively direct and simple.

[0036] However, the situation is more complex in cases of high-level anal fistulas. In these cases, the fistula tract is significantly elevated, extending beyond the deep layers of the external anal sphincter, with its internal opening far from the anal region and a significantly increased fistula length. This structural feature directly increases the difficulty of exploration. Once the probe passes through the internal opening, due to the tortuous path and limited length, it is difficult to immediately change direction to successfully exit the anus. Therefore, it is often necessary to use an anoscope with the aid of a field of vision, combined with surgical forceps and other tools, to repeatedly and meticulously pull and adjust the probe. This process is not only technically challenging but also carries a high risk, potentially damaging the intestinal tract and further exacerbating the patient's physical burden and psychological distress.

[0037] For the reasons stated above, this application provides a seton device for high-level anal fistulas, see [link to relevant documentation]. Figure 1 and Figure 2 As shown, the hanging device includes a conduit 10, an elastic cord 20, and a guide rod 30, wherein:

[0038] The catheter 10 is a hollow flexible tube made of flexible plastic. The catheter 10 has an insertion port 11 and an exit port 12, located near both ends of the tube. The insertion port 11 is used for inserting the guide rod 30, and the exit port 12 is used for removing the guide rod 30.

[0039] One end of the elastic cord 20 is connected to the portion of the conduit 10 near the exit port 12.

[0040] The guide rod 30 is made of metal and has a round head 31 at one end. The guide rod 30 is used to pass through the conduit 10 to guide the direction of advancement of the conduit 10.

[0041] In use, the guide rod 30 is inserted into the fistula from its external opening until the fistula tract and internal opening are reached. At this point, the rounded end 31 of the guide rod 30 protrudes from the internal opening, while the other end of the guide rod 30 remains outside the external opening. Then, the insertion port 11 of the catheter 10 is placed over the guide rod 30, and the catheter 10 is pushed from the external opening of the fistula inwards, using the guide rod 30 as a guide rail, until the catheter 10 protrudes from the internal opening. The guide rod 30 is then pulled out through the exit port 12 of the catheter 10. Finally, an instrument is inserted through the patient's anus into the internal opening, clamping the catheter 10 and pulling it out of the anus. The elastic cord 20 is then pulled through the fistula and anus by the traction of the catheter 10, and finally, the elastic cord 20 is tightened.

[0042] The seton device for high anal fistula provided in this embodiment uses a guide rod 30 to probe the fistula tract and internal opening, and the guide rod 30 serves as the track for advancing the catheter 10, allowing the catheter 10 to easily reach the internal opening. Utilizing the soft nature of the catheter 10, the direction can be easily changed by the instrument to smoothly pass through the anus, minimizing damage to the patient's intestines, making the surgical procedure faster and safer, and reducing the patient's physical burden and psychological distress.

[0043] Specifically, see Figure 1 and Figure 2 As shown, the tube sidewall of the conduit 10 is provided with a connection hole, and one end of the elastic line 20 forms a collar 21. The collar 21 is formed by binding a line segment near one end of the elastic line 20. The collar 21 is inserted into the connection hole so that the elastic line 20 is connected to the tube sidewall of the conduit 10.

[0044] Additionally, see Figure 3 As shown, the connection between the elastic cord 20 and the conduit 10 can also be achieved by inserting the elastic cord 20 into the conduit 10 through the other end of the conduit 10, and then passing it out through the exit port 12 to form a limiting knot 22. The outer dimension of the limiting knot 22 is larger than the inner diameter of the conduit 10, preventing the limiting knot 22 from entering the conduit 10, thus securing the limiting knot 22 outside the conduit 10 and connecting the elastic cord 20 to the conduit 10. This method eliminates the need to drill a connection hole in the side wall of the conduit 10, making the processing of the conduit 10 simpler.

[0045] Insertion port 11 is the opening at one end of the conduit 10, and withdrawal port 12 is the opening at the other end of the conduit 10, or withdrawal port 12 is an opening formed on the side wall of the conduit 10. Forming withdrawal port 12 on the side wall of the conduit 10 can create a larger withdrawal port 12 and avoid interference between withdrawal port 12 and elastic line 20, making it easier for guide rod 30 to be pulled out from withdrawal port 12.

[0046] In this embodiment of the application, in order to more easily determine the depth of the catheter 10 inserted into the fistula, a scale line can be provided on the outer wall of the catheter 10.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A seton device for high-level anal fistulas, characterized in that, Includes catheters, elastic cords, and guide rods; The conduit is a hollow flexible tube, and the guide rod is inserted through the conduit; The catheter has an insertion port and an exit port, which are located near opposite ends of the flexible tube, respectively. The elastic cord is connected to the conduit, and the elastic cord is close to the exit port.

2. The seton device for high-level anal fistula according to claim 1, characterized in that, The insertion port is the opening at one end of the conduit.

3. The seton device for high-level anal fistula according to claim 2, characterized in that, The conduit has an opening on its sidewall, which forms the exit port.

4. The seton device for high-level anal fistula according to claim 3, characterized in that, The elastic thread is inserted into the conduit through the opening at one of the other ends of the conduit, and after exiting through the exit port, it is wrapped around to form a limiting knot.

5. The seton device for high-level anal fistula according to claim 1, characterized in that, The conduit has a connecting hole on its side wall, and one end of the elastic cord forms a collar, which passes through the connecting hole.

6. The seton device for high-level anal fistula according to claim 5, characterized in that, The collar is formed by binding together a line segment near one end of the elastic line.

7. The seton device for high-level anal fistula according to claim 2, characterized in that, The exit port is the opening at the other end of the conduit.

8. The seton device for high-level anal fistula according to any one of claims 1-7, characterized in that, One end of the guide rod has a rounded tip.

9. The seton device for high-level anal fistula according to claim 8, characterized in that, The outer wall of the catheter is provided with graduation lines.

10. The seton device for high-level anal fistula according to claim 8, characterized in that, The catheter is made of flexible plastic, and the guide rod is made of metal.

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