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 in 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] The invention relates to the technical field of medical devices, and in particular to a pancreatic duct drainage device used for pancreaticojejunostomy. Background Art

[0002] Pancreaticoduodenectomy is an important surgical method for treating tumor diseases of the pancreatic head and its surrounding areas. During the operation, the surgeon needs to use sutures to re-anastomose the patient's pancreatic stump, common hepatic duct stump, and gastric stump to the jejunum, respectively, to achieve digestive tract reconstruction. Among them, pancreaticojejunostomy is a very challenging technique. The pancreatic juice secreted by the pancreas is corrosive; after pancreaticojejunostomy, pancreatic juice may still leak out of the digestive tract into the abdominal cavity through the needle holes of the sutures on the pancreas, the physical gaps between the pancreas and the jejunum that have not yet completely healed, etc., causing corrosion of tissues around the anastomosis and other abdominal organs and blood vessels, which in turn leads to serious complications such as postoperative bleeding and abdominal infection in the patient. In the most serious cases, it can lead to the patient's death.

[0003] In current clinical practice, in order to ensure the patency of the patient's pancreatic duct and reduce the risk and harm of severe pancreatic fistula after surgery, a drainage tube is often placed in the pancreatic duct, with one end of the tube deep into the pancreatic duct and the other end opening in the jejunum near the anastomosis, thereby promoting the smooth flow of pancreatic fluid into the intestine. Due to the characteristics of the anatomical structure (the intestinal duct where the pancreaticojejunal anastomosis is located is relatively low, and the fluid is not easy to drain to the downstream intestinal duct) and the fact that the intestinal motility of the patient's duct after surgery takes a long time to recover well, it is found in actual use that the drained fluid often accumulates in the intestinal duct around the anastomosis, which is not conducive to the healing of the pancreaticojejunal anastomosis. At the same time, it should be noted that during pancreaticojejunal anastomosis, the connection between the pancreatic stump wound and the intestine is mechanical, and it takes a long time for tissue repair and scar formation to form a whole between the two; promoting the adequate drainage of the residual pancreatic fluid in the gap area between the pancreatic section and the intestinal duct can promote the repair and healing of the wound and reduce the risk of pancreatic fistula. Therefore, designing a device to fully drain the pancreatic fluid to the distal intestinal duct may effectively reduce the occurrence of pancreatic fistula. Summary of the invention

[0004] The present invention discloses a pancreatic duct drainage device for pancreaticojejunostomy, so as to solve the problem in the above background technology of how to provide a device to fully drain pancreatic juice to the distal intestinal duct and effectively reduce the occurrence of pancreatic fistula.

[0005] In order to solve the above technical problems, the following technical solutions are proposed:

[0006] A pancreatic duct drainage device for pancreaticojejunostomy comprises a first drainage tube, wherein the first drainage tube is used to connect the pancreatic duct and the jejunum, the first drainage tube is composed of a plurality of first tube segments spliced ​​end to end in sequence, and two 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 away from the jejunum gradually decreases.

[0008] Preferably, it further comprises a second drainage tube, which is arranged on the side wall of the first drainage tube, with a first end of the second drainage tube buried in the anastomosis between the jejunum and the pancreatic duct, and a second end of the second drainage tube extending toward the jejunum.

[0009] Preferably, a fixing piece is further included, which is made of a biodegradable material and is arranged at the first end of the second drainage tube. The second drainage tube is fixed to the anastomosis between the jejunum and the pancreatic duct through the fixing piece.

[0010] Preferably, the fixing member includes a contact member and a clamping member, both of which are made of biodegradable materials, the contact member is annular in structure, the clamping member is disposed inside the contact member, and the first end of the second drainage tube is connected to the contact member via the clamping member.

[0011] Preferably, the second drainage pipe is composed of a plurality of second pipe sections, the second pipe sections are fixedly connected to the side walls of the first pipe sections, and two adjacent second pipe sections are connected via the connecting piece.

[0012] Preferably, it further comprises an elastic inner core, and the elastic inner core is detachably disposed in the pipe of the first drainage tube.

[0013] Preferably, the fixing member includes a contact member and a clip member, both of which are made of biodegradable materials, the clip member is in a triangular structure, the clip member is arranged at the first end of the second drainage tube, the contact member is in an arc-shaped strip structure, a group of the contact members are respectively arranged at the three corners of the clip member, and the contact members are bent toward the direction of the clip member.

[0014] Beneficial effects: The present invention 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 of the first drainage tube extends into the jejunum. The pancreatic duct and the jejunum are connected through the first drainage tube to create an "artificial fistula", so that the pancreatic juice can be smoothly drained to the distal end of the jejunum, thereby reducing the incidence of pancreaticojejunostomy fistula. In this embodiment, the first drainage tube is composed of a plurality of first tube segments spliced ​​end to end in sequence, and two adjacent first tube segments are connected by a connector made of biodegradable material. After the first drainage tube is placed in the patient's body for a period of time, the connector degrades, so that the first drainage tube can fall off naturally and be decomposed into a plurality of first tube segments, which are discharged from the body through the jejunum. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A state diagram is used for the present invention;

[0016] Figure 2 It is a structural schematic diagram of the overall structure of the present invention;

[0017] Figure 3 It is an exploded view of the overall structure of the present invention;

[0018] Figure 4 It is a schematic structural diagram of the fixing member of the present invention.

[0019] The main component symbols are described as follows:

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

[0021] 6. Second drainage tube; 7. Fixing member; 8. Contact member; 9. Connecting member;

[0022] 10. Second tube segment; 11. Guide wire; 12. Fixing ring. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can 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 invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] Pancreaticoduodenectomy is an important surgical method for treating tumor diseases of the pancreatic head and its surrounding areas. During the operation, the surgeon needs to use sutures to re-anastomose the patient's pancreatic stump, common hepatic duct stump, and gastric stump with the jejunum 2, respectively, to achieve digestive tract reconstruction. Among them, pancreaticojejunostomy is a very challenging technique. The pancreatic juice secreted by the pancreas is corrosive; after pancreaticojejunostomy, the pancreatic juice may still leak out of the digestive tract into the abdominal cavity through the needle holes of the sutures on the pancreas, the physical gap between the pancreas and the jejunum 2 that has not yet completely healed, etc., resulting in corrosion of tissues around the anastomosis and other abdominal organs and blood vessels. In current clinical practice, in order to ensure the patency of the patient's pancreatic duct and reduce the risk and harm of postoperative pancreatic leakage, a drainage tube is often placed in the pancreatic duct 1, one end of which is deep into the pancreatic duct 1 and the other end is opened in the jejunum 2 near the anastomosis. By inserting the pancreatic juice drainage tube into the main pancreatic duct 1 and fixing it for a period of time, the pancreatic juice can smoothly enter the jejunum 2, thereby reducing the risk of pancreaticojejunostomy fistula.

[0026] The present invention discloses a pancreatic duct drainage device for pancreaticojejunostomy, see Figure 1-4 , including 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 of the first drainage tube 3 extends to the distal end of the jejunum 2. The pancreatic duct 1 and the jejunum 2 are connected through the first drainage tube 3 to create an "artificial fistula", so that the pancreatic juice has enough time to enter the jejunum 2, thereby avoiding the occurrence of pancreaticojejunal anastomotic fistula. In this embodiment, the first drainage tube 3 is composed of a plurality of first tube segments 4 spliced ​​end to end in sequence, and two adjacent first tube segments 4 are connected by a connector 5 made of a biodegradable material, so that after the first drainage tube 3 is placed in the patient's body for a period of time, the connector 5 is degraded, so that the first drainage tube 3 is decomposed into a plurality of first tube segments 4, and then the first tube segment 4 can enter the colorectum through the jejunum 2 and the ileum, and finally be discharged from the body, which can avoid the first drainage tube 3 being placed in the human body all the time.

[0027] In the above implementation, the biodegradable material can be selected from biodegradable polymers such as polyglycolide or polydioxanone, among which polyglycolide and polydioxanone have biodegradability, high tensile strength and good biocompatibility. Therefore, the connector 5 made of polyglycolide or polydioxanone can enable the two adjacent first tube sections 4 to be firmly connected together.

[0028] In this embodiment, the diameter of the pancreatic duct 1 usually gradually decreases from the proximal jejunum side to the pancreatic tail. Therefore, in this embodiment, the first drainage tube 3 is designed as a structure with a gradually decreasing diameter at the end away from the jejunum 2. 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 proper support inside the pancreatic duct 1 to avoid displacement or falling off of the drainage tube in the pancreatic duct 1. Secondly, using the first drainage tube 3 with a gradually decreasing diameter at the end away from the jejunum 2 can also enable it to better anastomose with the pancreatic duct 1, reduce the accumulation of pancreatic fluid at the anastomosis, and reduce the risk of pancreatic fistula.

[0029] In clinical practice, pancreatic fluid may accumulate in the gap between the pancreatic duct 1 and the jejunum 2 at the anastomosis, which may cause complications such as pancreatic fistula and intra-abdominal infection. In order to prevent the occurrence of the above-mentioned complications, in this embodiment, a second drainage tube 6 is also included. The second drainage tube 6 is arranged on the side wall of the first drainage tube 3. The first end of the second drainage tube 6 is buried in the anastomotic gap between the jejunum 2 and the pancreatic duct 1, and the second end of the second drainage tube 6 extends toward the jejunum 2. The pancreatic fluid accumulated at the anastomosis between the pancreatic section and the jejunum 2 is fully drained through the second drainage tube 6, which helps to prevent postoperative complications.

[0030] In this embodiment, a fixing member 7 is also included. The fixing member 7 is made of a biodegradable material and is arranged at the first end of the second drainage tube 6. The second drainage tube 6 is fixed to the anastomosis between the jejunum 2 and the pancreatic duct 1 by the degradable fixing member 7. After the second drainage tube 6 is buried in the patient's body for a period of time, the fixing 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 fixing member 7 includes a contact member 8 and a clamping member 9, both of which are made of biodegradable materials. The clamping member 9 is in a triangular structure, and the clamping member is arranged at the first end of the second drainage tube. The contact member is in an arc-shaped strip structure, and a group of contact members are arranged at the three corners of the clamping member, and the contact members are bent toward the clamping member. When the second drainage tube 6 is fixed at the anastomosis between the jejunum 2 and the pancreatic duct 1, the contact member 8 with the arc-shaped strip structure 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 between the jejunum 2 and the pancreatic duct 1 to flow into the second drainage tube. At the same time, the second drainage tube 6 can be conveniently and firmly fixed on the contact member 8 through the triangular structure of the clamping member 9, and it is not easy to be pressed closed during suturing.

[0032] In this embodiment, the second drainage tube 6 is composed of a plurality of second tube segments 10, the second tube segments 10 are fixedly connected to the side wall of the first tube segment 4, and two adjacent second tube segments are connected by the connecting piece 5. The degradable connecting piece 5 enables the second drainage tube 6 to be separated into a plurality of second tube segments 10, so that it can be discharged from the body together with the first tube segment 4.

[0033] It should be noted that during pancreaticoduodenectomy, one end of the first drainage tube needs to be placed in the pancreatic duct 1 first, and then the other end of the first drainage tube is inserted into the jejunum through the opening on the jejunum and extended to the distal end of the jejunum. Therefore, in order to enable medical staff to more conveniently place the first drainage tube at the target position, the present embodiment also includes a guide wire 11, which is detachably arranged in the pipe of the first drainage tube 3. The detachable guide wire can assist medical staff in guiding the first drainage tube to the target position, thereby greatly reducing the difficulty of operation for medical staff.

[0034] As is known to all, the peristalsis of the jejunum 2 is an important part of the digestive system. The jejunum 2 (part of the small intestine) pushes food, digestive juices and other substances along the digestive tract through the coordinated movement of muscle contraction and relaxation. Therefore, when the first drainage tube 3 is buried in the patient's body, the position of the first drainage tube 3 may change due to the peristalsis of the jejunum 2. In order to prevent the above phenomenon from occurring, in the present embodiment, the side wall of the first tube segment 4 is further provided with a fixing ring 12, and the fixing ring 12 is made of a 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. Secondly, since the fixing ring 12 is made of a biodegradable material, after the first drainage tube 3 is fixed in the patient's body for a period of time, the fixing ring 12 automatically degrades, so that the first tube segment 4 can be separated from the jejunum 2 or the pancreatic duct 1, and then the first tube segment 4 can be discharged from the body. More preferably, in the present 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 see a doctor again for suture removal, which greatly reduces the patient's discomfort and the complexity of postoperative treatment. The use of absorbable sutures also reduces the risks of knot reactions that may be caused by suture removal or prolonged retention of sutures.

[0035] The above disclosures are only several specific embodiments of the present invention, but the present invention is not limited thereto, and any changes that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A pancreatic duct drainage device for pancreaticojejunostomy, characterized in that: It comprises a first drainage tube, which is used to connect the pancreatic duct and the jejunum. The first drainage tube is composed of a plurality of first tube sections which are sequentially spliced ​​end to end, and two adjacent first tube sections are connected by a connector.

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 away 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 arranged on the side wall of the first drainage tube, the first end of which is buried in the anastomosis between the jejunum and the pancreatic duct, and the second end of which extends toward the jejunum.

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

5. The pancreatic duct drainage device for pancreaticojejunostomy according to claim 4, characterized in that: The fixing member includes a contact member and a clamping member, both of which are made of biodegradable materials. The clamping member is in a triangular structure and is arranged at the first end of the second drainage tube. The contact member is in an arc-shaped strip structure, and a group of the contact members are respectively arranged at the three corners of the clamping member, and the contact members are bent toward the direction of the clamping member.

6. The pancreatic duct drainage device for pancreaticojejunostomy according to claim 3, characterized in that: The second drainage pipe is composed of a plurality of second pipe sections, the second pipe sections are fixedly connected to the side walls of the first pipe sections, and two adjacent second pipe sections are connected via the connecting piece.

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 arranged in the pipeline of the first drainage tube.

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

9. The pancreatic duct drainage device for pancreaticojejunostomy according to any one of claims 1 to 8, wherein the connecting piece is made of a biodegradable material.

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