Pancreatic duct stent

Abstract

The utility model relates to a pancreatic duct support, belongs to the technical field of medical instruments, and solves the technical problem that a pancreatic duct is mistakenly touched or mistakenly cut due to the fact that an existing pancreatic duct support cannot be positioned. The pancreatic duct stent comprises a pancreatic duct stent body, a supporting device, a communicating hole and a magnetic particle coating layer, the pancreatic duct stent body is arranged in a pancreatic duct, the supporting device is arranged on the pancreatic duct stent body to prevent the pancreatic duct stent body from shifting in the pancreatic duct, and the communicating hole is formed in the pancreatic duct stent body to enable pancreatic juice to flow into the pancreatic duct stent body; the magnetic particle coating layer is arranged on the pancreatic duct stent body. According to the pancreatic duct stent, the magnetic particle coating layer is arranged on the pancreatic duct stent body, the pancreatic duct stent body can be positioned through imaging equipment according to the characteristics of the magnetic particles, a doctor can conveniently and accurately know the position of the pancreatic duct stent body in the body, and the distance between the stent and a scalpel can be judged according to the position of the pancreatic duct stent body in the body; and the condition that the pancreatic duct is mistakenly touched or cut is effectively reduced.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a pancreatic duct stent. Background Technology

[0002] A pancreatic duct stent is a medical device used to treat pancreatic diseases. It is primarily placed within the pancreatic duct to maintain its patency and promote pancreatic juice drainage. Its working principle is based on a physical drainage mechanism: pancreatic juice produced by the pancreas needs to be transported through the pancreatic duct to the duodenum to participate in food digestion. However, when the pancreatic duct becomes narrowed or blocked due to inflammation, stones, tumors, or other reasons, pancreatic juice cannot flow normally, leading to increased pressure within the duct and causing a series of problems such as pain and exacerbated inflammation.

[0003] By using a pancreatic duct stent, a drainage channel is opened inside the pancreatic duct, creating space at narrow or blocked areas. This allows pancreatic juice to flow from the pancreas to the duodenum along the inner lumen of the stent, thereby reducing pressure within the pancreatic duct and alleviating the patient's symptoms.

[0004] In addition, pancreatic duct stents can also play a role in supporting the pancreatic duct to a certain extent during pancreatic tumor resection surgery, thereby locating the pancreatic duct and preventing accidental resection. However, with current pancreatic duct stents, the stent cannot be located after intervention, making it difficult to accurately judge the distance between the stent and the scalpel, which may lead to accidental contact with the pancreatic duct during surgery. Utility Model Content

[0005] Based on the above analysis, the present invention aims to provide a pancreatic duct stent to solve the technical problem of accidental contact or cutting of the pancreatic duct caused by the inability to be positioned in existing pancreatic duct stents.

[0006] The objective of this utility model is mainly achieved through the following technical solutions:

[0007] A pancreatic duct stent includes a pancreatic duct stent body, a support device, a connecting hole, and a magnetic particle coating layer;

[0008] The pancreatic duct stent body is disposed inside the pancreatic duct, the support device is disposed on the pancreatic duct stent body to prevent the pancreatic duct stent body from shifting inside the pancreatic duct, the connecting hole is opened on the pancreatic duct stent body to allow pancreatic fluid to flow into the pancreatic duct stent body, and the magnetic particle coating layer is disposed on the pancreatic duct stent body to position the pancreatic duct stent body.

[0009] The magnetic particle coating layer includes magnetic particle coating layer units disposed on the pancreatic duct stent body, and the magnetic particle coating layer units protrude from the outer surface of the pancreatic duct stent body.

[0010] Furthermore, the pancreatic duct stent body includes a first tube and a second tube, the first tube being sleeved on the outside of the second tube, the magnetic particle coating layer being located between the first tube and the second tube, the first tube abutting against the pancreatic duct, and the second tube being used to allow pancreatic fluid to flow.

[0011] Furthermore, the pancreatic duct stent body also includes a guide head, an inlet end, and an outlet end. The guide head is fixedly disposed on the outside of the inlet end and the outlet end. The spherical surface of the guide head faces the outside of the pancreatic duct stent body. The guide head is provided with a pancreatic fluid flow hole for pancreatic fluid to flow in or out.

[0012] Furthermore, the support device includes a support plate, one end of which is fixedly mounted on the pancreatic duct stent body, and the other end of which extends away from the pancreatic duct stent body, and the other end of which can abut against the pancreatic duct to prevent the pancreatic duct stent body from shifting within the pancreatic duct.

[0013] Furthermore, a buffer strip is fixedly provided on the edge of the support piece.

[0014] Furthermore, the pancreatic duct stent also includes a conical protrusion, which is fixedly disposed on the pancreatic duct stent body and can abut against the pancreatic duct.

[0015] Furthermore, the pancreatic duct stent body also includes a support frame, which is disposed on the inlet end and / or the outlet end to prevent the inlet end and / or the outlet end from being deformed by pressure.

[0016] Furthermore, the magnetic particle coating layer also includes a first layer wall, a second layer wall, and a magnetic particle cavity, wherein the first layer wall is sleeved on the outside of the second layer wall, and the magnetic particle cavity is located between the first layer wall and the second layer wall.

[0017] Furthermore, the magnetic particle coating layer also includes end barriers, which are disposed between the first layer wall and the second layer wall to isolate the two ends of the magnetic particle cavity.

[0018] Furthermore, the magnetic particle coating layer also includes a plurality of central partitions, which are disposed between the first layer wall and the second layer wall to block the central part of the magnetic particle cavity.

[0019] The technical solution of this utility model can achieve at least one of the following effects:

[0020] (1) The pancreatic duct stent of this utility model includes a pancreatic duct stent body, a support device, a connecting hole, and a magnetic particle coating layer. The pancreatic duct stent body is disposed inside the pancreatic duct. The support device is disposed on the pancreatic duct stent body to prevent the pancreatic duct stent body from shifting inside the pancreatic duct. The connecting hole is opened on the pancreatic duct stent body to allow pancreatic fluid to flow into the pancreatic duct stent body. The magnetic particle coating layer is disposed on the pancreatic duct stent body. By disposing of the magnetic particle coating layer on the pancreatic duct stent body, this utility model allows the pancreatic duct stent body to be positioned using imaging equipment based on the characteristics of magnetic particles. This facilitates doctors to accurately understand the position of the pancreatic duct stent body in the body. Doctors can determine the distance between the stent and the scalpel based on the position of the pancreatic duct stent body in the body, which can effectively reduce the situation of accidental contact or cutting of the pancreatic duct. In addition, by setting multiple magnetic particle coating layer units on the pancreatic duct stent body and making the magnetic particle coating layer units protrude from the outer surface of the pancreatic duct stent body, the pancreatic duct stent body can be positioned, which facilitates doctors to monitor the position of the stent during and after surgery. It can also support the pancreatic duct stent body and prevent the pancreatic duct stent from sliding or dislodging.

[0021] (2) The pancreatic duct stent of this utility model, by setting the guide head at the inlet and outlet of the pancreatic duct stent body and making the spherical surface of the guide head face the outside of the pancreatic duct stent body, can avoid damage to the tissue near the pancreatic duct during insertion and placement in the pancreatic duct. In addition, it can also reduce resistance during insertion and avoid sharp edges from scratching the pancreatic duct tissue.

[0022] (3) The pancreatic duct stent of this utility model can prevent the edge of the stent from scratching or piercing the tissue by fixing a buffer strip on the edge of the stent.

[0023] In this invention, the above-described technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of this invention will be set forth in the following description, and some advantages will become apparent from the description or be learned by practicing the invention. The objectives and other advantages of this invention can be realized and obtained from the description and accompanying drawings, which are particularly pointed out. Attached Figure Description

[0024] The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Throughout the drawings, the same reference numerals denote the same parts.

[0025] Figure 1 This is a schematic diagram of the pancreatic duct stent in an embodiment of the present invention;

[0026] Figure 2 This is a cross-sectional structural diagram of the pancreatic duct stent body in an embodiment of the present invention;

[0027] Figure 3 This is a schematic diagram of the flow guide head in an embodiment of the present invention;

[0028] Figure 4 This is a schematic diagram of the support device in an embodiment of the present invention;

[0029] Figure 5 This is a schematic diagram of the conical protrusion in an embodiment of the present invention;

[0030] Figure 6 This is a schematic diagram of the structure of the magnetic particle coating layer unit in the embodiment of this utility model;

[0031] Figure 7 This is a cross-sectional structural diagram of the magnetic particle coating layer in an embodiment of this utility model.

[0032] Figure label:

[0033] 1-Pancreatic duct stent body, 11-First tube body, 12-Second tube body, 13-Guide head, 131-Pancreatic juice flow hole, 14-Inlet end, 15-Outlet end, 16-Support frame;

[0034] 2-Support device, 21-Support plate, 211-Buffer stop bar;

[0035] 3-Connecting hole;

[0036] 4-Magnetic particle coating layer, 401-First wall layer, 402-Second wall layer, 403-Magnetic particle cavity, 404-End partition, 405-Middle partition, 41-Magnetic particle coating layer unit;

[0037] 5- Conical protrusion. Detailed Implementation

[0038] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0039] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments.

[0040] like Figure 1 , Figure 2 and Figure 6As shown, this utility model embodiment provides a pancreatic duct stent, including a pancreatic duct stent body 1, a support device 2, a connecting hole 3, and a magnetic particle coating layer 4; the pancreatic duct stent body 1 is disposed inside the pancreatic duct, the support device 2 is disposed on the pancreatic duct stent body 1 to prevent the pancreatic duct stent body 1 from shifting inside the pancreatic duct, the connecting hole 3 is opened on the pancreatic duct stent body 1 to allow pancreatic fluid to flow into the pancreatic duct stent body 1, and the magnetic particle coating layer 4 is disposed on the pancreatic duct stent body 1 to position the pancreatic duct stent body 1; the magnetic particle coating layer 4 includes magnetic particle coating layer units 41 arranged on the pancreatic duct stent body 1, and the magnetic particle coating layer units 41 protrude from the outer surface of the pancreatic duct stent body 1.

[0041] Specifically, the pancreatic duct stent body 1 is the core component of the pancreatic duct stent. It is placed inside the pancreatic duct to support it and allow pancreatic fluid to flow smoothly, facilitating its drainage. For example, the pancreatic duct stent body 1 can be made of plastic, self-expanding metal, or biodegradable material. It should be noted that the pancreatic duct stent body 1 is elastic and malleable. The support device 2 is disposed on the pancreatic duct stent body 1. The support device 2 is used to prevent the pancreatic duct stent body 1 from shifting within the pancreatic duct, ensuring that the pancreatic duct stent body 1 can be stably positioned in the predetermined location, thereby playing a supporting and drainage role. In addition, the support device 2 can increase the contact area between the pancreatic duct stent body 1 and the pancreatic duct wall, providing support, preventing pancreatic duct collapse or blockage, and facilitating the smooth flow of pancreatic fluid. The support device 2 can be made of the same material as the pancreatic duct stent body 1 and can be pigtail-shaped or wing-shaped. The connecting hole 3 is opened on the pancreatic duct stent body 1, providing a channel for pancreatic fluid to flow into the pancreatic duct stent body 1, allowing pancreatic fluid to enter the stent interior through the connecting hole 3, thereby achieving effective drainage.

[0042] The magnetic particle coating layer 4 is set on the pancreatic duct stent body 1 and is used to locate the position of the pancreatic duct stent body 1. Through the characteristics of magnetic particles, the pancreatic duct stent body 1 can be located outside the body using corresponding equipment, such as a handheld MPI imaging device. This allows doctors to accurately understand the position of the pancreatic duct stent body 1 in the body. Doctors can determine the distance between the stent and the scalpel based on the position of the pancreatic duct stent body 1 in the body. This can solve the technical problem of accidental contact or cutting of the pancreatic duct caused by the inability to locate the pancreatic duct stent.

[0043] Furthermore, the main function of the magnetic particle coating unit 41 is to locate the pancreatic duct stent body 1. Through the characteristics of magnetic particles, the pancreatic duct stent body 1 can be accurately located in vitro using magnetic devices (such as MPI imaging devices), which facilitates doctors to monitor the stent's position during and after surgery. In addition, the magnetic particle coating unit 41 protrudes from the outer surface of the pancreatic duct stent body 1 and can also support the pancreatic duct stent body 1, thereby preventing the pancreatic duct stent from sliding or dislodging.

[0044] In a preferred embodiment of this utility model, such as Figure 2 As shown, the pancreatic duct stent body 1 includes a first tube 11 and a second tube 12. The first tube 11 is sleeved on the outside of the second tube 12. The magnetic particle coating layer 4 is located between the first tube 11 and the second tube 12. The first tube 11 abuts against the pancreatic duct, and the second tube 12 is used to allow pancreatic fluid to flow.

[0045] The first tube 11 is fitted over the outside of the second tube 12 and directly contacts the pancreatic duct wall, serving as a support and fixation element. The second tube 12 is located inside the first tube 11, providing a channel for pancreatic fluid flow and ensuring smooth drainage. The magnetic particle coating layer 4 is located between the first tube 11 and the second tube 12 and is used to position the pancreatic duct stent body 1, facilitating positioning and adjustment using magnetic devices outside the body. Specifically, the first tube 11, the second tube 12, and the magnetic particle coating layer 4 can all be tubular structures. The magnetic particle coating layer 4 can completely cover the outside of the second tube 12, allowing the overall contour of the pancreatic duct stent body 1 to be located using an MPI imaging device.

[0046] In a preferred embodiment of this utility model, such as Figure 3 As shown, the pancreatic duct stent body 1 includes a guide head 13, which is fixedly disposed at the inlet end 14 and the outlet end 15 of the pancreatic duct stent body 1. The spherical surface of the guide head 13 faces the outside of the pancreatic duct stent body 1, and the guide head 13 is provided with pancreatic juice flow holes 131 for pancreatic juice to flow in or out. For example, the pancreatic juice flow holes 131 are circular through holes. Further, the guide head 13 is provided with 4 pancreatic juice flow holes 131 of the same size.

[0047] The guide head 13 can be hemispherical and is fixedly installed at the inlet end 14 and outlet end 15 of the pancreatic duct stent body 1. Its spherical surface faces the outside of the pancreatic duct stent body 1. Through the above design, damage to the tissue near the pancreatic duct can be avoided during insertion and placement in the pancreatic duct. In addition, during insertion, the guide head 13 can reduce resistance and avoid sharp edges from scratching the pancreatic duct tissue. The guide head 13 is provided with a pancreatic juice flow hole 131 to ensure that pancreatic juice can flow in and out normally.

[0048] In a preferred embodiment of this utility model, such as Figure 1 and Figure 4 As shown, the support device 2 includes a support piece 21. One end of the support piece 21 is fixedly mounted on the pancreatic duct stent body 1, and the other end of the support piece 21 extends away from the pancreatic duct stent body 1. The other end of the support piece 21 can abut against the pancreatic duct to prevent the pancreatic duct stent body 1 from shifting within the pancreatic duct. The support piece 21 has a certain elasticity and can move its position under force.

[0049] The other end of the support piece 21 extends away from the pancreatic duct stent body 1, allowing the support piece 21 to contact the inner wall of the pancreatic duct. Due to various physiological activities of the human body, such as organ peristalsis and fluid flow, the pancreatic duct stent body 1 may shift. The other end of the support piece 21 abuts against the pancreatic duct, and the friction and support between the support piece 21 and the inner wall of the pancreatic duct effectively restrict the movement of the pancreatic duct stent body 1 within the pancreatic duct.

[0050] Based on this, such as Figure 3 As shown, a buffer strip 211 is fixedly provided on the edge of the support piece 21. The buffer strip 211 can be made of silicone material to prevent the edge of the support piece 21 from scratching or piercing the tissue.

[0051] In a preferred embodiment of this utility model, such as Figure 5 As shown, the pancreatic duct stent also includes a conical protrusion 5, which is fixedly mounted on the pancreatic duct stent body 1 and can abut against the pancreatic duct. The conical protrusion 5 can effectively prevent the pancreatic duct stent from shifting within the pancreatic duct. Through its conical structure, the conical protrusion 5 can make close contact with the pancreatic duct wall, providing stable support and ensuring that the pancreatic duct stent will not slide or dislodge in the predetermined position. The conical protrusion 5 can be made of the same material as the pancreatic duct stent body 1, or it can be made of silicone. The conical protrusion 5 can be fixedly mounted on the pancreatic duct stent body 1 by adhesive.

[0052] In a preferred embodiment of this utility model, such as Figure 1 As shown, the pancreatic duct stent body 1 also includes a support frame 16, which is disposed on the inlet end 14 and / or the outlet end 15 to prevent the inlet end 14 and / or the outlet end 15 from being deformed by pressure. During organ peristalsis, the pancreatic duct stent body 1 sandwiched between organs is easily squeezed, especially the inlet end 14 and the outlet end 15. When deformed by pressure, it will affect the inflow and outflow of pancreatic juice. Using the support frame 16 to resist the deformation by pressure can ensure the normal operation of the inflow and outflow functions. Specifically, the support frame 16 is a ring type and is made of a material with higher hardness than the pancreatic duct stent body 1, such as plastic.

[0053] In a preferred embodiment of this utility model, such as Figure 7As shown, the magnetic particle coating layer 4 also includes a first layer wall 401, a second layer wall 402, and a magnetic particle cavity 403. The first layer wall 401 is sleeved on the outside of the second layer wall 402, and the magnetic particle cavity 403 is located between the first layer wall 401 and the second layer wall 402. For example, the first layer wall 401 and the second layer wall 402 can be made of silicone. Specifically, the ends of the first layer wall 401 and the ends of the second layer wall 402 are sealed to each other, and the gap between them forms the magnetic particle cavity 403. The magnetic particle cavity 403 is used to contain the magnetic particle solution. The magnetic particle solution provides magnetic marking inside the pancreatic duct stent body 1, enabling it to be accurately located under MPI imaging.

[0054] Based on this, such as Figure 7 As shown, the magnetic particle coating layer 4 also includes an end partition 404, which is disposed between the first layer wall 401 and the second layer wall 402 to separate the two ends of the magnetic particle cavity 403. For example, the end partition 404 can be made of the same material as the first layer wall 401 and the second layer wall 402. In actual application, the magnetic particle solution is easy to move in the magnetic particle cavity 403, causing the magnetic particle solution to concentrate in a certain area of ​​the magnetic particle cavity 403. In this case, it is difficult to locate the overall position of the pancreatic duct stent body 1. By setting the end partition 404, two points on the pancreatic duct stent body 1 can be located. Based on these two points, the approximate position of the pancreatic duct stent body 1 can be estimated.

[0055] Based on this, such as Figure 7 As shown, the magnetic particle coating layer 4 also includes multiple central partitions 405. The central partitions 405 are disposed between the first layer wall 401 and the second layer wall 402 to block the central part of the magnetic particle cavity 403. For example, the central partitions 405 can be made of the same material as the first layer wall 401 and the second layer wall 402. Combined with the end partitions 404, the central partitions 405 are disposed in the middle of the magnetic particle cavity 403, dividing the magnetic particle cavity 403 into multiple regions. Through the above design, the magnetic particle solution is evenly distributed in the cavity, improving the positioning accuracy.

[0056] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model should be included within the protection scope of the present utility model.

Claims

1. A pancreatic duct stent, characterized in that, It includes a pancreatic duct stent body (1), a support device (2), a connecting hole (3), and a magnetic particle coating layer (4); The pancreatic duct stent body (1) is disposed inside the pancreatic duct, the support device (2) is disposed on the pancreatic duct stent body (1) to prevent the pancreatic duct stent body (1) from shifting inside the pancreatic duct, the connecting hole (3) is opened on the pancreatic duct stent body (1) to allow pancreatic fluid to flow into the pancreatic duct stent body (1), and the magnetic particle coating layer (4) is disposed on the pancreatic duct stent body (1) to position the pancreatic duct stent body (1); The magnetic particle coating layer (4) includes magnetic particle coating layer units (41) disposed on the pancreatic duct stent body (1), and the magnetic particle coating layer units (41) protrude from the outer surface of the pancreatic duct stent body (1).

2. The pancreatic duct stent according to claim 1, characterized in that, The pancreatic duct stent body (1) includes a first tube (11) and a second tube (12). The first tube (11) is sleeved on the outside of the second tube (12). The magnetic particle coating layer (4) is located between the first tube (11) and the second tube (12). The first tube (11) abuts against the pancreatic duct, and the second tube (12) is used to allow pancreatic fluid to flow.

3. The pancreatic duct stent according to claim 1, characterized in that, The pancreatic duct stent body (1) also includes a guide head (13), an inlet end (14) and an outlet end (15). The guide head (13) is fixedly disposed on the outside of the inlet end (14) and the outlet end (15). The spherical surface of the guide head (13) faces the outside of the pancreatic duct stent body (1). The guide head (13) is provided with a pancreatic fluid flow hole (131) for pancreatic fluid to flow in or out.

4. The pancreatic duct stent according to claim 1, characterized in that, The support device (2) includes a support plate (21), one end of which is fixedly mounted on the pancreatic duct stent body (1), and the other end of which extends away from the pancreatic duct stent body (1). The other end of the support plate (21) can abut against the pancreatic duct to prevent the pancreatic duct stent body (1) from shifting within the pancreatic duct.

5. The pancreatic duct stent according to claim 1, characterized in that, The pancreatic duct stent also includes a conical protrusion (5), which is fixedly disposed on the pancreatic duct stent body (1) and can abut against the pancreatic duct.

6. The pancreatic duct stent according to claim 3, characterized in that, The pancreatic duct stent body (1) also includes a support frame (16), which is disposed on the inlet end (14) and / or the outlet end (15) to prevent the inlet end (14) and / or the outlet end (15) from being deformed by pressure.

7. The pancreatic duct stent according to any one of claims 1-5, characterized in that, The magnetic particle coating layer (4) further includes a first layer wall (401), a second layer wall (402), and a magnetic particle cavity (403). The first layer wall (401) is sleeved on the outside of the second layer wall (402), and the magnetic particle cavity (403) is located between the first layer wall (401) and the second layer wall (402).

8. The pancreatic duct stent according to claim 7, characterized in that, The magnetic particle coating layer (4) further includes an end partition (404), which is disposed between the first layer wall (401) and the second layer wall (402) to partition the two ends of the magnetic particle cavity (403).

9. The pancreatic duct stent according to claim 7, characterized in that, The magnetic particle coating layer (4) further includes a central partition (405), which is disposed between the first layer wall (401) and the second layer wall (402) to block the central part of the magnetic particle cavity (403).

10. The pancreatic duct stent according to claim 4, characterized in that, A buffer strip (211) is fixedly provided on the edge of the support plate (21).

Images