A Drug-Eluting Sheath (DES) comprises an inner elastic layer, an outer elastic layer, and at least a therapeutic agent layer said therapeutic agent layer is sandwiched partly between said inner layer and said outer layer. Said outer layer has several splittable structures such as points, or lines or patterns on its outer surface. The DES is put on a slightly flattened catheter balloon, which guarantees both the DES and the balloon are elastically combined. The balloon carried with the DES is advanced to the treatment site of the tubular organ, and then inflated, wherein the inflating splits the outer elastic layer to expose the therapeutic agent layer to the treatment site. After treatment, the balloon is deflated, withdrawn, cleaned, and replaced with a new DES for repetitively reusing the balloon to the same patient.一種釋藥套管(Drug-Eluting Sheath,DES),主要包含一彈性內層、一彈性外層,與至少一種藥物,該些藥物包入於該彈性內層與該彈性外層之間,該釋藥套管的彈性外層設置有較為脆弱的點或線或圖案,該釋藥套管使用時套上於稍許充氣的球囊導管,可隨球囊導管一起變形。當球囊導管送達管狀組織或器官的阻塞處或傷口處,對球囊導管施加壓力使其膨脹,同時也撐大該釋藥套管,當釋藥套管的彈性外層所設置的脆弱點或線或圖案處受力產生破裂,藥物立即有效釋出。治療後,球囊導管消氣,球囊導管/釋藥套管一起取出體外,取下釋藥套管,清洗球囊導管,套上新的釋藥套管,即可對同一病患再次進行治療。
