2 leg with primary varicose vein were randomly devided into group A and group B.RCSV andStripping of long saplienous vein were respectively performed in the two group.The changes of venousblood partial carbon dioxide pressure

partial oxygen pressure and oxygen saturation before and afteroperation were compared with normal control Complications of group A were compared with groupB. Pathologicalchanges of thigh segment of saplienous vein was examined.The results showed thatRCSV restored the function of saphenofemoral valve The thigh segment of saphenofemoral valve. The thing segment of saphenous vein was preserved for later use in grafts.It was a new procedure intreating primary varicose vein of low er leg.