ABSTRACT
Objective To investigate the irradiating effect of low intensive microwave(LIM) on pathological process of blood vessel restenosis(RS) and assess the probability of LIM irradiation to prevent was used RS.(Methods Forty-four) male healthy New Zealand rabbits were randomly divided into 2 groups.Fogarty catheter traumatize to the tunica intima of iliac artery so as to establish RS models.Two thousand four hundred and fifty MHz microwave with different power of 2,5 and 10 mW/cm~2 was used,locally to irradiate EIA in irradiating group(1 h/d).Specimens were obtained at different time of 3,7,14 and 28 d after operation.Morphological changes of tissues were observed with HE and EF staining and the area of tunica intima,tunica media and the rate of cavity stenosis were analyzed with image analysis system;apoptosis was detected with TUNEL;phenotype and microstructure of VSMC were observed with TEM.Results After microwave irradiating,inflammatory reaction in early period was suppressed,mural thrombus decreased,the proliferation and migration of VSMC depressed,the area of tunica intima and the rate of cavity stenosis obviously reduced comparing with the control group(P0.05).At other different time,however,the rate of apoptosis cells in irradiating groups obviously increased than that of the control group(P