Self-drainage type bile duct drainage support tube

Abstract

The utility model provides a self-drainage type bile duct drainage support tube which comprises a tube body, and the tube body further comprises a traction mechanism used for guiding the tube body to be separated from the biliary tract and a limiting mechanism used for preventing the tube body from moving in the direction of the biliary duct in a retrograde mode. The limiting mechanism is arranged between the head end and the tail end of the tube body; the traction mechanism is arranged between the limiting mechanism and the head end of the pipe body; the traction mechanism comprises a second elastic valve, the second elastic valve is fixedly connected to the outer side of the pipe body, and the tail end of the second elastic valve points to the tail end of the pipe body. The traction mechanism is arranged, after a patient takes food for the first time two days after an operation, the traction mechanism carries the tail end of the tube body out of the bile duct under the pressure effect of food for many times, the tube body can fall off automatically, and the limiting mechanism is arranged, so that the tube body is prevented from moving reversely towards the bile duct direction, and the situation that the tube body cannot fall off automatically is avoided.

Description

Technical Field

[0001] The utility model belongs to the field of medical instruments, and in particular relates to a self-draining bile duct drainage stent tube. Background Art

[0002] During bile duct exploration surgery, such as after bile duct lithotomy, the Oddi sphincter of the duodenal papilla often has inflammation and edema due to common bile duct inflammation or ampulla stone incarceration. Long-term inflammatory stimulation causes Oddi sphincter contraction and relaxation dysfunction, and decreased opening and closing function, which often leads to obstruction of the bile duct, which can easily cause an increase in pressure in the bile duct, leading to bile leakage from the bile duct incision and suture, overflowing into the abdominal cavity, causing serious complications such as bile peritonitis. Severe bile leakage can even endanger the patient's life.

[0003] Currently, nasobiliary external drainage or fixed internal stents are placed under duodenoscope during surgery to reduce the pressure in the bile duct and prevent postoperative bile leakage. However, this surgical method not only increases the operation time and patient costs, but also causes great physical discomfort and psychological trauma to patients due to the retention of the nasobiliary duct. The fixed internal stent needs to be removed again under duodenoscope. Utility Model Content

[0004] Therefore, the technical problem to be solved by the utility model is to provide a self-draining bile duct drainage stent tube, which can reduce the internal pressure of the bile duct and can also fall off in the intestine by itself and be discharged with feces, avoiding secondary tube removal.

[0005] The scheme of the utility model is as follows:

[0006] A self-draining bile duct drainage stent tube comprises a tube body, a traction mechanism for guiding the tube body to leave the bile duct, and a limiting mechanism for preventing the tube body from moving retrogradely toward the bile duct;

[0007] The limiting mechanism is arranged between the head end and the tail end of the tube body;

[0008] The traction mechanism is arranged between the limiting mechanism and the head end of the tube body;

[0009] The traction mechanism comprises a second elastic flap, the second elastic flap is fixedly connected to the outside of the tube body, and the end of the second elastic flap points to the tail end of the tube body.

[0010] Furthermore, a marking line is provided between the tail end of the tube body and the limiting mechanism.

[0011] Furthermore, the marking line is 10-15 mm away from the rear end of the tube body.

[0012] Furthermore, the marking line is arranged around the outer circumference of the tube body.

[0013] Furthermore, the limiting mechanism includes a first elastic flap, the first elastic flap is fixedly connected to the outside of the tube body, and the end of the first elastic flap points to the rear end of the tube body.

[0014] Furthermore, the root of the first elastic flap is 5-10 mm away from the head end of the tube body.

[0015] Furthermore, a first side hole is formed on the side of the tube body, and the side hole is located on a side of the first elastic valve close to the rear end of the tube body.

[0016] Furthermore, a second side hole is formed on the side of the tube body, and the side hole is located on a side of the second elastic flap close to the rear end of the tube body.

[0017] Furthermore, the self-draining bile duct drainage stent tube has a total length of 50-60 mm, an outer diameter of 2.5-3 mm, and an inner diameter of 2-2.5 mm.

[0018] Furthermore, the tube body is a hose.

[0019] Beneficial effects: The self-draining bile duct drainage stent tube provided by the utility model is implanted in the bile duct, and its head end, traction mechanism and limiting mechanism pass through the duodenal papilla and are inserted into the duodenum, and the tail end of the tube body is retained in the common bile duct, thereby realizing bile drainage. At the same time, by setting the traction mechanism, the traction mechanism is repeatedly subjected to the pressure of food after the patient's first meal two days after the operation, and the tail end of the tube body is brought out of the bile duct, realizing the self-detachment of the tube body. By setting the limiting mechanism, the tube body is prevented from moving retrograde in the direction of the bile duct, thereby preventing the tube body from being unable to fall off by itself. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to make the content of the utility model more clearly understood, the utility model is further described in detail below based on specific embodiments of the utility model in combination with the accompanying drawings.

[0021] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;

[0022] Figure 2 for Figure 1 A schematic diagram of the structure from another perspective;

[0023] In the accompanying drawings, the structures represented by the reference numerals are listed as follows:

[0024] 1. Tube body, 2. First elastic flap, 3. Second elastic flap, 4. Marking line, 5. First side hole, 6. Second side hole. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the utility model.

[0026] like Figure 1 , 2 As shown, a self-draining bile duct drainage stent tube comprises a tube body 1, a traction mechanism for guiding the tube body 1 to leave the bile duct, and a limiting mechanism for preventing the tube body 1 from moving retrogradely toward the bile duct; the limiting mechanism is arranged between the head end and the tail end of the tube body 1; the traction mechanism is arranged between the limiting mechanism and the head end of the tube body 1. When in use, the self-draining bile duct drainage stent tube is passed through the duodenal papilla from the bile duct under the guidance of a non-vascular lumen guide wire, the traction mechanism and the limiting mechanism are placed in the duodenum, and the tail end of the tube body is left in the bile duct, so that the stent tube can open the duodenal papilla, ensure the patency of the bile duct, reduce the pressure in the bile duct, and prevent bile from leaking out of the bile duct incision and suture.

[0027] The traction mechanism includes a second elastic flap 3, which is fixedly connected to the outside of the tube body 1, and the end of the second elastic flap 3 points to the tail end of the tube body 1. During the placement process, the stent tube is first placed in the bile duct. At this time, the second elastic flap 3 can be elastically deformed by the pressure of the bile duct wall and closely attached to the outside of the tube body 1, so as to facilitate the movement of the stent tube in the bile duct. After the stent tube passes through the duodenal papilla, the second elastic flap 3 is reset, and the angle formed between the second elastic flap 3 and the tube body 1 can receive food. The patient starts to eat 1-2 days after the operation. The traction mechanism receives the food falling in the intestine and uses the pressure of the food to pull it down multiple times, gradually pulling the tail end of the tube body 1 out of the bile duct. The tube body 1 falls into the intestine as a whole. To facilitate discharge, the tube body 1 is a soft tube. The position of the tube body is checked by X-ray or ultrasound 5-6 days after the operation. The tube body is discharged with feces 8-15 days after the operation. The advantage of self-discharge is that there is no need to remove the tube after the operation, which reduces pain. A limiting mechanism is provided to prevent the stent tube from retrogradely retreating too long and causing the traction mechanism to fail.

[0028] The stent tube is generally used with a non-vascular intracavitary guide wire as a guiding accessory and is placed in a suitable position under direct vision of a choledochoscope. In order to assist the physician in placing the stent tube, a marking line 4 is provided between the tail end of the tube body 1 and the limiting mechanism, which can provide a reference for the amount of tail end retention for the choledochoscope when the physician is performing the placement operation. Preferably, the marking line 4 is provided around the outer circumference of the tube body 1 to improve the visibility of the marking.

[0029] In a preferred embodiment, the marking line 4 is 10-15 mm away from the rear end of the tube body 1 .

[0030] To facilitate the placement operation, the limiting mechanism includes a first elastic flap 2, which is fixedly connected to the outer side of the tube body 1, and the end of the first elastic flap 2 points to the tail end of the tube body 1. During the placement process, the stent tube is first placed in the bile duct. At this time, the first elastic flap 2 can be elastically deformed by the pressure of the bile duct wall, and is close to the outer side of the tube body 1, which is convenient for the movement of the stent tube in the bile duct. After the stent tube passes through the duodenal papilla, the first elastic flap 2 is reset. When the stent tube appears to retrograde in the direction of the bile duct, the first elastic flap 2 presses against the duodenal wall to prevent the stent tube from further retrograde.

[0031] In a preferred embodiment, the root of the first elastic flap 2 is 5-10 mm away from the head end of the tube body 1 .

[0032] In order to further reduce the internal pressure of the bile duct during retrograde movement, a first side hole 5 is further opened on the side of the tube body 1. The side hole is located on the side of the first elastic flap 2 close to the tail end of the tube body 1. When the stent tube retrogrades, the first elastic flap 2 presses against the duodenal wall, and the first side hole 5 enters the bile duct. The bile between the bile duct and the tube body 1 can be discharged through the first side hole 5.

[0033] The side of the tube body 1 is also provided with a second side hole 6 , which is located at the root of the second elastic flap 3 and close to the tail end of the tube body 1 , so that bile can be discharged not only from the head end but also through the first side hole 5 .

[0034] In a preferred embodiment, the self-draining bile duct drainage stent tube has a total length of 50-60 mm, an outer diameter of 2.5-3 mm, and an inner diameter of 2-2.5 mm.

[0035] The number of the first elastic flap 2 and the second elastic flap 3 is not limited to one, and can also be two, three or more. When multiple first elastic flaps 2 are used, they only need to be located in the same cross-section. When multiple second elastic flaps 3 are used, their positions can be located at any position between the head end and the limiting mechanism, and the function of carrying the food flow to pull the tail end of the tube body 1 can be achieved.

[0036] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "circumferential", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the technical solution and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the technical solution.

[0037] In this technical solution, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this technical solution can be understood according to specific circumstances.

[0038] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present technical solution. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they contradict each other.

[0039] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A self-draining bile duct drainage stent tube, characterized in that: It comprises a tube body (1), a traction mechanism for guiding the tube body (1) to leave the bile duct, and a limiting mechanism for preventing the tube body (1) from moving retrogradely in the direction of the bile duct; The limiting mechanism is arranged between the head end and the tail end of the tube body (1); The traction mechanism is arranged between the limiting mechanism and the head end of the tube body (1); The traction mechanism comprises a second elastic flap (3), the second elastic flap (3) is fixedly connected to the outside of the tube body (1), and the end of the second elastic flap (3) points to the rear end of the tube body (1).

2. The self-draining bile duct drainage stent tube according to claim 1, characterized in that: A marking line (4) is provided between the rear end of the tube body (1) and the limiting mechanism.

3. The self-draining bile duct drainage stent tube according to claim 2, characterized in that: The marking line (4) is 10-15 mm away from the rear end of the tube body (1).

4. The self-draining bile duct drainage stent tube according to claim 2, characterized in that: The marking line (4) is arranged around the outer circumference of the tube body (1).

5. The self-draining bile duct drainage stent tube according to claim 1, characterized in that: The limiting mechanism comprises a first elastic flap (2), the first elastic flap (2) is fixedly connected to the outside of the tube body (1), and the end of the first elastic flap (2) points to the rear end of the tube body (1).

6. The self-draining bile duct drainage stent tube according to claim 5, characterized in that: The root of the first elastic flap (2) is 5-10 mm away from the head end of the tube body (1).

7. The self-draining bile duct drainage stent tube according to claim 5, characterized in that: The side surface of the tube body (1) is also provided with a first side hole (5), which is located on a side of the first elastic flap (2) close to the rear end of the tube body (1).

8. The self-draining bile duct drainage stent tube according to claim 1, characterized in that: The side surface of the tube body (1) is also provided with a second side hole (6), and the side hole is located on a side of the second elastic flap (3) close to the rear end of the tube body (1).

9. The self-draining bile duct drainage stent tube according to claim 1, characterized in that: The self-draining bile duct drainage stent tube has a total length of 50-60 mm, an outer diameter of 2.5-3 mm, and an inner diameter of 2-2.5 mm.

10. The self-draining bile duct drainage stent tube according to claim 1, characterized in that: The pipe body (1) is a hose.

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