Absorbable suture-free pancreatic duct supporting tube for pancreaticointestinal anastomosis
By designing an absorbable suture-free pancreatic duct support tube, using bionic taper anchor structure and gradient degradation material, and integrating accurate measurement functions, it solves the problems of the existing pancreatic duct support tube being unabsorbent, unfixed and lacking accurate measurement, significantly reducing the incidence of pancreatic fistula and medical costs after surgery, and improving surgical safety.
Patent Information
- Application Number
- CN202510205464.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-24
- Publication Date
- 2025-04-25
AI Technical Summary
The existing pancreatic duct support duct is not absorbed, is not firmly fixed, is easily displaced or fall off, and the lack of devices to accurately measure the diameter of the pancreatic duct leads to a high incidence of pancreatic fistula after pancreatic anastomosis, which increases the pain and medical costs of patients.
A resorbable suture-free pancreatic duct support tube was designed, using a bionic taper anchor structure instead of traditional suture, using gradient degradation materials, and integrating and accurately measuring the pancreatic duct measuring tube that matches the pancreatic duct morphology.
The pancreatic duct supports have strong stability, good adaptability, convenient connection and good biocompatibility, which reduces the incidence of pancreatic fistula after surgery, eliminates the need for secondary removal surgery, shortens the surgical operation time, improves surgical safety and reduces medical costs.
Smart Images
Figure CN119867852A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of medical devices, and in particular relates to an absorbable suture-free pancreatic duct support tube for pancreaticojejunostomy. Background Art
[0002] Pancreaticoduodenectomy (PD) is a standard surgical procedure for the treatment of periampullary tumors and certain benign diseases. Since Whipple first performed PD in 1935, the safety of the operation has been greatly improved, and the perioperative mortality rate has been controlled below 5%. However, the incidence of postoperative complications remains at 30% to 40%, among which pancreatic fistula is one of the main surgical complications and the main cause of death in patients after PD. A large sample retrospective case study reported that the incidence of pancreatic fistula after PD was 9.2% to 26.7%, and the mortality rate of pancreatic fistula was as high as 20% to 50%. In recent years, the role of different drainage methods of pancreatic duct stents in reducing the incidence of complications after PD has become a hot topic and focus of research by scholars at home and abroad. The placement of a pancreatic duct stent for drainage during pancreaticoduodenectomy has a postoperative pancreatic fistula incidence of 0 to 16%, which is significantly reduced compared with the placement of no pancreatic duct stent during pancreaticoduodenectomy. However, there are many problems with the pancreatic duct stents used in clinical practice. First, non-absorbable materials require a second operation to remove, increasing pain and risk to patients; second, the stent is not firmly fixed and is prone to displacement or fall off, leading to anastomotic leakage; in addition, the lack of a device to accurately measure the diameter of the pancreatic duct leads to improper selection of the stent; in addition, the degradation rate of the stent does not match the healing of the tissue and may degrade too early or too late, affecting the efficacy; the existing stent is complex in design, the surgical operation time is long, and the risk of infection is increased. Summary of the invention
[0003] The purpose of the present invention is to solve the technical problems of the existing pancreatic duct support tube, such as non-absorbability, loose fixation, easy displacement or falling off, and lack of accurate measurement of the pancreatic duct diameter, and to provide an absorbable suture-free pancreatic duct support tube for pancreaticojejunostomy. The pancreatic duct support tube replaces the traditional suture with a bionic taper anchoring structure, uses gradient degradation materials to synchronize the support cycle with tissue healing, integrates accurate measurement to match the pancreatic duct morphology, and aims to reduce the incidence of postoperative pancreatic fistula, eliminate the need for secondary removal surgery, shorten the operation time of pancreaticojejunostomy, and ultimately achieve the core goal of improving surgical safety and reducing medical costs.
[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is:
[0005] An absorbable suture-free pancreatic duct support tube for pancreatico-enteric anastomosis, comprising a pancreatic duct support drainage tube pancreatic duct segment (1), a pancreatic duct measuring tube (2), a pancreatic duct support drainage tube intestinal duct segment (3) and a pancreatic duct support drainage tube connecting device (4), wherein the pancreatic duct measuring tube (2) is sleeved on the outside of the pancreatic duct support drainage tube pancreatic duct segment (1), and the large opening end of the pancreatic duct support drainage tube pancreatic duct segment (1) is connected to the large opening end of the pancreatic duct support drainage tube intestinal duct segment (3) and fixed via the pancreatic duct support drainage tube connecting device (4).
[0006] Furthermore, the pancreatic duct support drainage tube pancreatic duct segment (1) is a conical cylinder with one end large and the other end small, with barbs (6) provided on its surface and drainage holes (5) provided on both side surfaces. After being inserted into the pancreatic duct, the barbs (6) can be firmly fixed inside the pancreatic duct to reduce the risk of the pancreatic duct support drainage tube falling off and ensure smooth drainage.
[0007] Furthermore, the diameter of the large-mouth end of the pancreatic duct section (1) of the pancreatic duct support drainage tube is 2 mm, 3 mm and 5 mm.
[0008] Furthermore, the surface of the pancreatic duct measuring tube (2) is provided with scale markings for measuring the pancreatic duct diameter and insertion depth.
[0009] Furthermore, a side hole (7) is provided on the surface of the intestinal section (3) of the pancreatic duct support drainage tube.
[0010] Furthermore, the absorbable suture-free pancreatic duct support tube is made of polylactic acid.
[0011] The beneficial effects of the present invention are:
[0012] 1. Strong stability: The surface of the pancreatic duct section of the pancreatic duct support drainage tube is provided with barbs, and drainage holes are provided on both sides. After being inserted into the pancreatic duct, the barbs can be fixed inside the pancreatic duct, effectively reducing the risk of the support tube falling off, ensuring that the support tube is in a stable position and the drainage is unobstructed during the treatment process.
[0013] 2. Good adaptability: Three models of 2mm, 3mm and 5mm are set according to the diameter of the wide end of the pancreatic duct segment of the pancreatic duct support drainage tube. At the same time, a pancreatic duct measuring tube is equipped to measure the pancreatic duct diameter and the insertion depth of the support tube. The appropriate model of pancreatic duct support tube can be accurately selected according to the patient's specific pancreatic duct condition, thereby improving the targetedness and effectiveness of treatment.
[0014] 3. Convenient connection: The pancreatic duct support drainage tube connection device is set to a belt-shaped snap-on type, which can quickly and easily connect the pancreatic duct branch and the intestinal duct branch, which helps the smooth progress of the surgical operation and reduces the operation time and complexity.
[0015] 4. Good biocompatibility: The absorbable suture-free pancreatic duct support tube is made of polylactic acid that can be absorbed by the human body, which solves the problem that the anti-seepage structure in the prior art is difficult to degrade in the human body, avoids complications such as infection and rejection that may be caused by the long-term retention of the support tube in the body, reduces the patient's pain, and improves the safety and comfort of treatment. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a schematic diagram of the structure of the present invention;
[0017] Figure 2 It is a schematic diagram of the structure of the pancreatic duct support drainage duct pancreatic duct segment;
[0018] In the figure: 1-pancreatic duct support drainage tube pancreatic duct segment, 2-pancreatic duct measuring tube, 3-pancreatic duct support drainage tube intestinal segment, 4-pancreatic duct support drainage tube connecting device, 5-drainage hole, 6-barb, 7-side hole. DETAILED DESCRIPTION
[0019] The present invention is described in detail below with reference to the accompanying drawings and embodiments.
[0020] like Figure 1 As shown, in this embodiment, an absorbable suture-free pancreatic duct support tube for pancreatico-enteric anastomosis includes a pancreatic duct support drainage tube pancreatic duct segment 1, a pancreatic duct measuring tube 2, a pancreatic duct support drainage tube intestinal duct segment 3 and a pancreatic duct support drainage tube connecting device 4. The pancreatic duct measuring tube 2 is sleeved on the outside of the pancreatic duct support drainage tube pancreatic duct segment 1, and the large end of the pancreatic duct support drainage tube pancreatic duct segment 1 is connected to the large end of the pancreatic duct support drainage tube intestinal duct segment 3 and fixed by the pancreatic duct support drainage tube connecting device 4. The pancreatic duct support drainage tube pancreatic duct segment 1 is a cone with one end large and the other end small, and the small end is a closed end. The surface is provided with barbs 6, and drainage holes 5 are provided on the two side surfaces. The barbs 6 can be firmly fixed inside the pancreatic duct after being inserted into the pancreatic duct to reduce the risk of the pancreatic duct support drainage tube falling off and ensure smooth drainage. The diameters of the wide-mouth end of the pancreatic duct segment 1 of the pancreatic duct support and drainage tube are 2 mm, 3 mm and 5 mm. The three diameters of the support and drainage tubes are adapted to the pancreatic duct conditions of different patients.
[0021] The surface of the pancreatic duct measuring tube 2 is provided with scale markings for measuring the pancreatic duct diameter and insertion depth. The clear scale markings on the surface can not only accurately display the depth, but also mark the model of the pancreatic duct support and drainage tube pancreatic duct segment 1 corresponding to the pancreatic duct diameter matching the corresponding depth, so that the doctor can quickly and accurately obtain data during the operation, so as to quickly select the appropriate model of the pancreatic duct support tube.
[0022] The surface of the pancreatic duct support and drainage tube intestinal tube section 3 is provided with a side hole 7. The pancreatic duct support and drainage tube intestinal tube section 3 is used to be inserted into the jejunal end, and its shape and size design conform to the physiological structure characteristics of the human intestine to ensure smoothness and stability of insertion.
[0023] The pancreatic duct support drainage tube connection device 4 is configured as a belt-shaped buckle type, which can realize reliable connection between the pancreatic duct support drainage tube pancreatic duct segment 1 and the pancreatic duct support drainage tube intestinal segment 3. The buckle material matches the overall support drainage tube material and has certain strength and flexibility.
[0024] The absorbable suture-free pancreatic duct support tube is made of polylactic acid that can be absorbed by the human body, and the polylactic acid has good biocompatibility.
[0025] The method of use of the present invention is:
[0026] During the operation, the doctor first uses the pancreatic duct measuring tube 2 to measure the patient's pancreatic duct diameter and the required insertion depth. According to the measured data, a suitable pancreatic duct support and drainage tube pancreatic duct segment 1 is selected from three models of 2mm, 3mm and 5mm.
[0027] The selected pancreatic duct support and drainage tube pancreatic duct segment 1 is slowly inserted into the pancreatic end 3-5cm, and is fixed inside the pancreatic duct using the barbs on its surface. Then, the pancreatic duct support and drainage tube intestinal segment 3 is connected to the pancreatic duct support and drainage tube pancreatic duct segment 1 through the buckle of the pancreatic duct support and drainage tube connecting device 4. After the connection is completed, the pancreatic duct support and drainage tube intestinal segment 3 is accurately placed in the small intestine, and then the pancreaticojejunostomy operation is performed. With the assistance of the pancreatic duct support tube, accurate pancreaticojejunostomy is completed, and finally a safe and reliable pancreaticojejunostomy state is formed.
[0028] During the postoperative recovery process, since the pancreatic duct support drainage tube is made of polylactic acid that can be absorbed by the human body, it will gradually be absorbed by the human body over time, and no additional removal operation is required, reducing the patient's pain and risk of reoperation.
Claims
1. An absorbable suture-free pancreatic duct support tube for pancreaticojejunostomy, characterized in that: The invention comprises a pancreatic duct support and drainage tube pancreatic duct segment (1), a pancreatic duct measuring tube (2), a pancreatic duct support and drainage tube intestinal duct segment (3) and a pancreatic duct support and drainage tube connecting device (4), wherein the pancreatic duct measuring tube (2) is sleeved on the outside of the pancreatic duct support and drainage tube pancreatic duct segment (1), and the large opening end of the pancreatic duct support and drainage tube pancreatic duct segment (1) is connected to the large opening end of the pancreatic duct support and drainage tube intestinal duct segment (3) and fixed via the pancreatic duct support and drainage tube connecting device (4).
2. The absorbable suture-free pancreatic duct support tube for pancreaticojejunostomy according to claim 1, characterized in that: The pancreatic duct support drainage tube pancreatic duct section (1) is a cone-shaped column with one end large and the other end small, and is provided with barbs (6) on its surface and drainage holes (5) on both sides of the surface. After being inserted into the pancreatic duct, the barbs (6) can be firmly fixed inside the pancreatic duct to reduce the risk of the pancreatic duct support drainage tube falling off and ensure smooth drainage.
3. The absorbable suture-free pancreatic duct support tube for pancreaticojejunostomy according to claim 1 or 2, characterized in that: The diameter of the large opening end of the pancreatic duct section (1) of the pancreatic duct support drainage tube is 2 mm, 3 mm and 5 mm.
4. The absorbable suture-free pancreatic duct support tube for pancreaticojejunostomy according to claim 1, characterized in that: The surface of the pancreatic duct measuring tube (2) is provided with scale markings for measuring the pancreatic duct diameter and insertion depth.
5. The absorbable suture-free pancreatic duct support tube for pancreaticojejunostomy according to claim 1, characterized in that: The surface of the intestinal tube section (3) of the pancreatic duct support drainage tube is provided with a side hole (7).
6. The absorbable suture-free pancreatic duct support tube for pancreaticojejunostomy according to claim 1, characterized in that: The absorbable suture-free pancreatic duct support tube is made of polylactic acid.