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经皮腔内血管成形术(PTA)、支架植入均广泛用于治疗外周及心脑血管狭窄性疾病,但术后再狭窄(RS)发生率达30%~50%[1~3],严重影响其远期疗效。目前国内外对预防再狭窄的研究包括药物治疗、基因治疗、新的成形术和放射治疗等,前三者均未得到满意的效果,而放射线具有特定的生物学效
Percutaneous transluminal angioplasty (PTA) and stent implantation are widely used in the treatment of peripheral and cardiovascular and cerebrovascular stenosis, but the incidence of postoperative restenosis (RS) is 30% -50% Seriously affect its long-term efficacy. At present, researches on the prevention of restenosis both at home and abroad include drug therapy, gene therapy, new angioplasty and radiotherapy, etc. The first three have not been satisfactory results, and the radiation has a specific biological effect