High molecular film coated scaffold

Abstract

A scaffold enwrapped with a polymer film in medical instrument field comprising a scaffold and a polymer film layer having non-biodegradable film material and biodegradable film material plastered closely thereon, wherein the thickness of the polymer film layer is 1 mum to 3000mum. The combination manner of the polymer film and the scaffold includes physical, chemical or mechanical manners for combining the polymer film to the nude scaffold. The scaffold enwrapped with a polymer film can support the tract, eliminate the obstruction and further inhibit the intrusion of tumor tissue, being suitable for patients with malignant tumor in tract and complicated with fistula, the mechanical property of which can reach the index requirement such as the extension strength, tearing strength and extensional deformation, its has favorable mechanical support property, capable of inhibiting tumor inward growth and treating fistula.

Description

technical field [0001] The invention relates to a component in the technical field of medical equipment, in particular to a polymer membrane-wrapped stent. Background technique [0002] Benign and malignant stenosis of various duct organs in the human body (such as digestive tract, urethra, biliary tract, pancreatic duct, etc.) is a common clinical disease. Among them, malignant stenosis of the digestive tract is a high-incidence disease in patients with digestive tract cancer. In addition to surgical resection, radiotherapy and chemotherapy, commonly used interventional methods mainly include balloon dilatation (mainly for benign strictures) and stent placement. For patients with advanced digestive tract cancer, stent implantation is a very important palliative treatment method, which can effectively improve the quality of life and prolong the survival time of patients with advanced digestive tract cancer. However, traditional metal stents still have at least two disadvan...

AI Technical Summary

Problems solved by technology

However, traditional metal stents still have at least two disadvantages: ①It only plays a palliative role of mechanical support and short-term relief of symptoms, and it is powerless to prevent restenosis caused by tumor growth; ②It can solve gastrointestinal fistula caused by malignant tumors. , and other combined hollow visceral fistulas are powerless

"The disadvantage is that the tumor tissue can easily grow into the cavity through the mesh, resulting in short-term restenosis

Once restenosis occurs, it will be very troublesome for both the patient and the doctor. The former will bear more pain and suffering and higher medical expenses, while the latter will bear the relatively high surgical risk caused by re-intervention treatment.