3D (three-dimensional) printed stitch-free pancreatico-duodenectomy stent and manufacturing method thereof

Abstract

The invention discloses a 3D (three-dimensional) printed stitch-free pancreatico-duodenectomy stent. The 3D printed stitch-free pancreatico-duodenectomy stent made of a degradable biological material by a 3D printing technology comprises a stent duct and protrusive spines protruding over the outer wall of the stent duct, a protrusive head is integrally connected with one end of the stent duct, and holes are formed in the wall of the stent duct. The manufacturing method of the 3D printed stitch-free pancreatico-duodenectomy stent includes the steps of (1) measuring the diameter of a pancreatic duct of a patient needing a hepatopancreat and obiliary reconstructive operation through CT (computed tomography); (2) according to a CT thin layer scanning result, acquiring needed 3D printing data through algorithmic conversion and image processing, designing the spines and the protrusive head structure on the pancreatico-duodenectomy contact face; (3) using the most precise 3D printer and the biological and degradable material to print the 3D pancreatico-duodenectomy stent which is applied to stitch-free pancreatico-duodenectomy. The 3D printed stitch-free pancreatico-duodenectomy stent has the advantages of simple structure, convenience in use, remarkable effect and capability of achieving stitch-free pancreatico-duodenectomy, the risks of leakage and narrowness are reduced, and operating difficulty and risks are reduced greatly.

Description

technical field [0001] The invention relates to the technical field of medical and surgical supplies, and belongs to a 3D printing suture-free pancreaticojejunostomy bracket and a preparation method thereof. Background technique [0002] Traditional open pancreatoduodenectomy is complex and traumatic, while biliary-enteric anastomosis and pancreatico-jejunostomy are key steps in pancreaticoduodenectomy. Biliary-enteric anastomotic leakage and pancreaticoenteric anastomotic leakage caused by incomplete healing of mouth) are common serious complications after operation, with a general incidence rate of 5-20%, and the mortality rate of pancreatico-enteric anastomotic leakage can reach 20-40%. Treatment is expensive. [0003] In recent years, a large number of case reports of laparoscopic or da Vinci surgical robotic (minimally invasive) pancreaticoduodenectomy in a few comprehensive large hospitals at home and abroad have shown that minimally invasive pancreaticoduodenectomy i...

AI Technical Summary

Problems solved by technology

Many attempts have been made in this area in previous studies, but so far there is no product that can be used clinically. The reason is that biliary-enteric anastomosis and pancreatico-enteric anastomosis are not like gastrointestinal anastomosis. Because of the strong plasticity of the tissue, the size of the anastomosis The anastomosis is relatively fixed and the anastomosis is large, so staplers have been widely used in clinical practice; the shape, size and caliber of the biliary tract and pancreatic duct vary greatly due to the nature and stage of the disease, and the plasticity of the pancreatic duct and bile duct is poor, and the diameter of the duct is small. Therefore, an anastomotic ring or stapler with the same caliber produced by a fixed mold like a gastrointestinal stapler is not suitable for clinical use.

If it is too thick, it will easily spread excessively and affect the blood supply of the tissue; if it is too thin, it will cause unstable fixation

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