New Biologic Degraded Membrane-Covered Esophageal Stent
LENG De-rong;Micro-Tech(Nanjing) CO., LTD;
Esophageal stent placement has become an important mean for esophageal carcinoma to relieve esophageal stenosis of patients. With the development in technique, biodegradable stent has been studied widely because of its degradation after supporting lumen for a short time in vivo. However, the clinical results have shown that the subsequent complications of esophageal stent, such as esophageal mucosa hyperplasia and re-stenosis, and stent shifting, have not been completely solved. Therefore, a novel biodegradable membrane-covered esophageal stent which can prevent sent shifting and reduce hyperplasia effectively has been supplied. The sent includes reticular structure segmented made by PPDO, covered-membrane of PLA skirt cascade, imaging markers and special fixed knot. Segmentation design of sent can play a supporting role in esophageal stenosis, and the segments of sent can relatively move free. Skirt cascade membrane can greatly reduce the sustainability irritation on the non-esophageal stenosis to avoid excessive hyperplasia phenomenon caused by sustainability irritation esophageal mucosa. As special fixed knot and segmentation structure can hold other segments expanded normally when one of them is pressed deformation, the sent is not easy to shift.