Pancreatic duct drainage device for pancreaticointestinal anastomosis

Abstract

The pancreatic duct drainage device comprises a first drainage tube, one end of the first drainage tube is arranged on a main pancreatic duct in the using process, the other end of the first drainage tube extends into the jejunum, and the pancreatic duct and the jejunum are communicated through the first drainage tube so as to create an artificial fistula. And the pancreatic juice can smoothly enter the jejunum, so that the possibility of pancreatic-intestinal anastomotic fistula is reduced. In the embodiment, the first drainage tube is formed by sequentially splicing a plurality of first tube sections end to end, every two adjacent first tube sections are connected through a connecting piece made of biodegradable materials, and after the first drainage tube is placed in the body of a patient for a period of time, the connecting pieces are degraded, so that the first drainage tube is decomposed into a plurality of first tube sections; therefore, the first tube section can discharge the first drainage tube out of the body through the jejunum, and automatic tube drawing of the first drainage tube is achieved.

Description

Technical Field

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

[0002] Pancreaticoduodenectomy is an important surgical procedure for treating tumors of the pancreatic head and surrounding tissues. During the surgery, surgeons use sutures to re-anastomose the pancreatic stump, common hepatic duct stump, and gastric stump to the jejunum, thereby reconstructing the digestive tract. Pancreaticojejunostomy is a particularly challenging technique. Pancreatic juice is corrosive; even after anastomosis, pancreatic juice can still leak into the abdominal cavity through needle holes in the sutures on the pancreas and physical gaps remaining between the pancreas and jejunum before complete healing. This can lead to corrosion of surrounding tissues, other abdominal organs, and blood vessels, resulting in serious complications such as postoperative bleeding and abdominal infection, and in the most severe cases, death.

[0003] In current clinical practice, to ensure the patency of the pancreatic duct and reduce the risk and harm of severe postoperative pancreatic fistula, a drainage tube is often placed in the pancreatic duct, with one end extending into the duct and the other end opening into the jejunum near the anastomosis, thereby promoting the smooth outflow of pancreatic juice into the intestine. Due to the anatomical characteristics (the intestinal segment at the pancreaticojejunostomy site is relatively low, making it difficult for fluid to drain downstream) and the long recovery time of intestinal motility after surgery, it has been found in practice that the drained fluid often accumulates in the intestinal segment around the anastomosis, hindering the healing of the pancreaticojejunostomy. It is also important to note that during pancreaticojejunostomy, the connection between the pancreatic stump and the intestine is mechanical; tissue repair and scar formation to form a unified whole takes a considerable amount of time. Promoting adequate drainage of residual pancreatic juice in the gap between the pancreatic stump and the intestine can promote wound repair and healing, reducing the risk of pancreatic fistula. Therefore, designing a device to adequately drain pancreatic juice into the distal intestinal segment may effectively reduce the occurrence of pancreatic fistula. Utility Model Content

[0004] This invention discloses a pancreatic duct drainage device for pancreaticojejunostomy, which solves the problem in the background art of how to provide a device to fully drain pancreatic juice to the distal intestinal tract and effectively reduce the occurrence of pancreatic fistula.

[0005] To solve the above-mentioned technical problems, the following technical solution is proposed:

[0006] A pancreatic duct drainage device for pancreaticojejunostomy includes a first drainage tube for connecting the pancreatic duct and the jejunum. The first drainage tube is composed of several first tube segments joined end to end in sequence, and adjacent first tube segments are connected by a connector, wherein the connector is made of a biodegradable material.

[0007] Preferably, the diameter of the end of the drainage tube furthest from the jejunum gradually decreases.

[0008] Preferably, the system also includes a second drainage tube, which is disposed on the side wall of the first drainage tube. The first end of the second drainage tube is embedded at the anastomosis between the jejunum and the pancreatic duct, and the second end of the second drainage tube extends into the jejunum.

[0009] Preferably, the device also includes a fixation element made of a biodegradable material, which is disposed at the first end of the second drainage tube, and the second drainage tube is fixed to the anastomosis between the jejunum and the pancreatic duct by the fixation element.

[0010] Preferably, the fixing member includes a contact and a snap-fit ​​member, both of which are made of biodegradable materials. The contact has a ring-shaped structure, and the snap-fit ​​member is placed inside the contact. The first end of the second drainage tube is connected to the contact through the snap-fit ​​member.

[0011] Preferably, the second drainage tube is composed of several second tube sections, which are fixedly connected to the side wall of the first tube section, and adjacent second tube sections are connected by the connector.

[0012] Preferably, it also includes an elastic inner core, which is detachably disposed inside the first drainage tube.

[0013] Preferably, the fixing component includes a contact and a snap-fit ​​component, both of which are made of biodegradable materials. The snap-fit ​​component has a triangular structure and is disposed at the first end of the second drainage tube. The contact has an arc-shaped strip structure, with a set of the contact at each of the three corners of the snap-fit ​​component, and the contact is bent toward the snap-fit ​​component.

[0014] Beneficial Effects: This utility model discloses a pancreatic duct drainage device for pancreaticojejunostomy, including a first drainage tube. During use, one end of the first drainage tube is placed in the main pancreatic duct, and the other end extends into the jejunum. The first drainage tube connects the pancreatic duct and the jejunum to create an "artificial fistula," allowing pancreatic juice to drain smoothly to the distal jejunum, thereby reducing the incidence of pancreaticojejunostomy leakage. In this embodiment, the first drainage tube is composed of several first tube segments sequentially spliced ​​end-to-end. Adjacent first tube segments are connected by connectors made of biodegradable material. After the first drainage tube is placed in the patient's body for a period of time, the connectors degrade, allowing the first drainage tube to detach naturally and decompose into several first tube segments, which are then discharged through the jejunum. Attached Figure Description

[0015] Figure 1 This is a diagram showing the usage state of this utility model;

[0016] Figure 2 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 3 This is an exploded view of the overall structure of this utility model;

[0018] Figure 4 This is a structural schematic diagram of the fastener of this utility model.

[0019] The symbols for the main components are explained below:

[0020] 1. Pancreatic duct; 2. Jejunum; 3. First drainage tube; 4. First tube segment; 5. Connector;

[0021] 6. Second drainage tube; 7. Fixing component; 8. Contact component; 9. Snap-fit ​​component;

[0022] 10. Second tube section; 11. Guide wire; 12. Fixing ring. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0024] The following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0025] Pancreaticoduodenectomy is an important surgical procedure for treating tumors of the pancreatic head and surrounding tissues. During the surgery, surgeons use sutures to re-anastomose the pancreatic stump, common hepatic duct stump, and gastric stump to the jejunum 2, thereby reconstructing the digestive tract. Pancreaticojejunostomy is a particularly challenging technique. Pancreatic juice is corrosive; even after anastomosis, pancreatic juice can still leak into the abdominal cavity through needle holes in the sutures on the pancreas and physical gaps remaining between the pancreas and jejunum 2 before complete healing, leading to corrosion of surrounding tissues and other abdominal organs and blood vessels. In current clinical practice, to ensure the patency of the pancreatic duct and reduce the risk and harm of postoperative pancreatic leakage, a drainage tube is often placed in the pancreatic duct 1, with one end extending into the pancreatic duct 1 and the other end opening into the jejunum 2 near the anastomosis. By inserting and fixing the pancreatic juice drainage tube in the main pancreatic duct 1 for a period of time, pancreatic juice can smoothly enter the jejunum 2, thus reducing the risk of pancreaticojejunostomy leakage.

[0026] This utility model discloses a pancreatic duct drainage device for pancreaticojejunostomy. Please refer to [link to relevant documentation]. Figure 1-4 The system includes a first drainage tube 3. During use, one end of the first drainage tube 3 is placed in the main pancreatic duct 1, and the other end extends to the distal end of the jejunum 2. The first drainage tube 3 connects the pancreatic duct 1 and the jejunum 2 to create an "artificial fistula," allowing pancreatic juice sufficient time to enter the jejunum 2, thereby preventing pancreaticojejunostomy leakage. In this embodiment, the first drainage tube 3 is composed of several first tube segments 4 sequentially spliced ​​end to end. Adjacent first tube segments 4 are connected by connectors 5 made of biodegradable material. After the first drainage tube 3 is placed in the patient's body for a period of time, the connectors 5 degrade, causing the first drainage tube 3 to decompose into several first tube segments 4. These first tube segments 4 can then pass through the jejunum 2 and ileum into the colon and rectum, and finally be discharged from the body, preventing the first drainage tube 3 from remaining inside the body indefinitely.

[0027] In the above embodiments, the biodegradable material can be selected from biodegradable polymers such as polyglycolic acid or polydioxanone. Polyglycolic acid and polydioxanone have biodegradability, high tensile strength and good biocompatibility. Therefore, the connector 5 made of polyglycolic acid or polydioxanone can make two adjacent first pipe sections 4 firmly connected together.

[0028] In this embodiment, the diameter of the pancreatic duct 1 typically decreases gradually from the side near the jejunum to the pancreatic tail. Therefore, in this embodiment, the first drainage tube 3 is designed with a structure in which the diameter of the end away from the jejunum 2 gradually decreases. By using a drainage tube with a gradually decreasing diameter, it can be ensured that the drainage tube can be smoothly inserted into the pancreatic duct 1 and maintain appropriate support inside the pancreatic duct 1, avoiding displacement or dislodgement of the drainage tube within the pancreatic duct 1. Furthermore, using a first drainage tube 3 with a gradually decreasing diameter at the end away from the jejunum 2 also allows it to better anastomose with the pancreatic duct 1, reducing the accumulation of pancreatic juice at the anastomosis site and lowering the risk of pancreatic fistula.

[0029] In clinical practice, pancreatic juice may accumulate in the anastomosis between the pancreatic duct 1 and the jejunum 2, which may lead to complications such as pancreatic fistula and intra-abdominal infection. To prevent the occurrence of the above complications, this embodiment also includes a second drainage tube 6. The second drainage tube 6 is disposed on the side wall of the first drainage tube 3. The first end of the second drainage tube 6 is buried in the anastomosis between the jejunum 2 and the pancreatic duct 1, and the second end of the second drainage tube 6 extends into the jejunum 2. The pancreatic juice accumulated at the anastomosis between the pancreatic section and the jejunum 2 is fully drained through the second drainage tube 6, thereby helping to prevent postoperative complications.

[0030] In this embodiment, a fixation member 7 is also included. The fixation member 7 is made of a biodegradable material and is disposed at the first end of the second drainage tube 6. The second drainage tube 6 is fixed at the anastomosis between the jejunum 2 and the pancreatic duct 1 by the biodegradable fixation member 7. After the second drainage tube 6 is implanted in the patient's body for a period of time, the fixation member 7 degrades, so that the second drainage tube 6 can automatically detach from the anastomosis between the jejunum 2 and the pancreatic duct 1.

[0031] In this embodiment, the fixation member 7 includes a contact member 8 and a snap-fit ​​member 9. Both the contact member 8 and the snap-fit ​​member 9 are made of biodegradable materials. The snap-fit ​​member 9 has a triangular structure and is located at the first end of the second drainage tube. The contact member has an arc-shaped strip structure, with a set of contact members at each of the three corners of the snap-fit ​​member, and the contact members are bent towards the snap-fit ​​member. When the second drainage tube 6 is fixed at the anastomosis of the jejunum 2 and the pancreatic duct 1, the arc-shaped strip structure of the contact member 8 can greatly reduce the patient's discomfort. Secondly, there is an opening between two adjacent contact members, which makes it easier for the tissue fluid at the anastomosis of the jejunum 2 and the pancreatic duct 1 to flow into the second drainage tube. At the same time, the triangular structure of the snap-fit ​​member 9 allows the second drainage tube 6 to be conveniently and firmly fixed on the contact member 8, and it is not easy for it to be compressed during suturing.

[0032] In this embodiment, the second drainage tube 6 is composed of several second tube sections 10. The second tube sections 10 are fixedly connected to the side wall of the first tube section 4, and two adjacent second tube sections are connected by the connector 5. The biodegradable connector 5 allows the second drainage tube 6 to be separated into several second tube sections 10, so that it can be discharged from the body together with the first tube section 4.

[0033] It should be noted that during pancreaticoduodenectomy, one end of the first drainage tube needs to be placed into the pancreatic duct 1 first, and then the other end of the first drainage tube is inserted into the jejunum through an opening in the jejunum and extended to the distal end of the jejunum. Therefore, in order to make it easier for medical staff to place the first drainage tube in the target position, this embodiment also includes a guide wire 11. The guide wire 11 is detachably installed in the tube of the first drainage tube 3. The detachable guide wire helps medical staff to guide the first drainage tube to the target position, thereby greatly reducing the difficulty of operation for medical staff.

[0034] As is well known, jejunal peristalsis is an important part of the digestive system. The jejunum (part of the small intestine) propels food, digestive juices, and other substances along the digestive tract through coordinated muscle contraction and relaxation. Therefore, when the first drainage tube 3 is implanted in the patient's body, the peristalsis of the jejunum may cause the position of the first drainage tube 3 to change. In order to prevent the above phenomenon from occurring, in this embodiment, a fixing ring 12 is also provided on the side wall of the first tube segment 4. The fixing ring 12 is made of biodegradable material. The first tube segment 4 is sutured and fixed to the inner wall of the patient's jejunum by the fixing ring 12, thereby fixing the first drainage tube 3 in the patient's jejunum 2. Furthermore, since the fixing ring 12 is made of biodegradable material, after the first drainage tube 3 is fixed in the patient's body for a period of time, the fixing ring 12 will automatically degrade, allowing the first tube segment 4 to separate from the jejunum 2 or pancreatic duct 1, thereby allowing the first tube segment 4 to be discharged from the body. More preferably, in this embodiment, absorbable sutures are used to suture the first drainage tube 3 into the patient's body. The absorbable sutures will naturally degrade and be absorbed by the body after the wound heals, so there is no need to go to the hospital again to remove the sutures, which greatly reduces the patient's discomfort and the complexity of postoperative treatment. In addition, the use of absorbable sutures reduces the risk of suture knot reaction that may be caused by suture removal or long-term suture retention.

[0035] The above-disclosed embodiments are only a few specific examples of this utility model. However, this utility model is not limited thereto. Any variations that can be conceived by those skilled in the art should fall within the protection scope of this utility model.

Claims

1. A pancreatic duct drainage device for pancreaticojejunostomy, characterized in that, It includes a first drainage tube, which is used to connect the pancreatic duct and the jejunum. The first drainage tube is composed of several first tube segments spliced ​​end to end in sequence, and adjacent first tube segments are connected by connectors.

2. The pancreatic duct drainage device for pancreaticojejunostomy according to claim 1, characterized in that, The diameter of the end of the first drainage tube furthest from the jejunum gradually decreases.

3. The pancreatic duct drainage device for pancreaticojejunostomy according to claim 1, characterized in that, It also includes a second drainage tube, which is disposed on the side wall of the first drainage tube. The first end of the second drainage tube is buried at the anastomosis between the jejunum and the pancreatic duct, and the second end of the second drainage tube extends into the jejunum.

4. The pancreatic duct drainage device for pancreaticojejunostomy according to claim 3, characterized in that, It also includes a fixation element made of a biodegradable material, which is disposed at the first end of the second drainage tube, and the second drainage tube is fixed to the anastomosis between the jejunum and the pancreatic duct by the fixation element.

5. The pancreatic duct drainage device for pancreaticojejunostomy according to claim 4, characterized in that, The fixing component includes a contact and a snap-fit ​​component, both of which are made of biodegradable materials. The snap-fit ​​component has a triangular structure and is located at the first end of the second drainage tube. The contact has an arc-shaped strip structure, with a set of the contact at each of the three corners of the snap-fit ​​component, and the contact is bent toward the snap-fit ​​component.

6. The pancreatic duct drainage device for pancreaticojejunostomy according to claim 3, characterized in that, The second drainage tube is composed of several second tube sections, which are fixedly connected to the side wall of the first tube section, and adjacent second tube sections are connected by the connector.

7. The pancreatic duct drainage device for pancreaticojejunostomy according to claim 1, characterized in that, It also includes an elastic inner core, which is detachably installed inside the first drainage tube.

8. The pancreatic duct drainage device for pancreaticojejunostomy according to claim 1, characterized in that, It also includes a fixation ring made of a biodegradable material, which is disposed on the side wall of the first tube segment, and the first tube segment is fixed in the patient's jejunum by the fixation ring.

9. The pancreatic duct drainage device for pancreaticojejunostomy according to any one of claims 1-8, characterized in that, The connector is made of a biodegradable material.

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