Skeleton pattern medicine film encapsulated alimentary tract stent

Abstract

An alimentary canal supporting stand covered by the frame medicine membrane, belonging to the medical and medical appliance technique field. The first structure form of this invention comprises: supporting stand, back lining layer and multi-layer frame medicine membrane, the back lining layer is covered on the surface of the supporting stand, the back lining layer clings tightly to the supporting stand, and the multi-layer frame medicine membrane clings tightly to the back lining layer. The second structure form of this invention comprises: supporting stand and multi-layer frame medicine membrane, the multi-layer frame medicine membrane is covered on the supporting stand surface, and clings tightly to the supporting stand. The third structure form of this invention comprises: supporting stand, back lining layer, multi-layer frame medicine membrane and protective layer, the protective layer is installed on the multi-layer frame medicine membrane layer. The fourth structure form of this invention comprises: supporting stand, back lining layer, multi-layer frame medicine membrane and protective layer, the protective layer is installed on the multi-layer frame medicine membrane layer. The invention possesses the function of mechanical expansion, it can make the medicine act on the pathology tissue or the near place, thus provides medicine partly and slowly in the long run.

Description

technical field [0001] The invention relates to a component in the technical field of medicine and medical equipment, in particular to a skeleton-type drug-film-wrapped digestive tract stent. Background technique [0002] Gastrointestinal benign and malignant strictures are clinically common diseases. 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 and covered stents still have at least the following two shortcomings: ① they do not have...

AI Technical Summary

Problems solved by technology

However, traditional metal stents and covered stents still have at least the following two shortcomings: ① they do not have real local therapeutic effects, and only play a role of mechanical support—short-term palliative effect of reducing symptoms, and they are powerless to prevent restenosis caused by tumor growth ; Although covered stents can prevent tumor ingrowth to a certain extent, they still cannot prevent tumor longitudinal overgrowth and oppressive restenosis

② After metal stent implantation, it is still necessary to cooperate with systemic drug treatment, but the blood concentration of cancer tissue after systemic drug administration is low, and it is difficult to achieve an effective therapeutic concentration; However, most anticancer drugs have serious side effects, and it is not advisable for most patients with advanced esophageal cancer who have already developed organ lesions or are extremely weak.

"The disadvantage is that the controlled-release layer with holes is easily damaged during the delivery of the stent.

Moreover, these film layers need to be precisely controlled during production, making the process more difficult.