Wittens, C.H.

patient venou access study treatment diameter varicose veins surgery group varicose measurement venous disease disease saphenous vein duplex ultrasound artery result score fistula saphenou complication blood forearm cryo strip group baseline perforator dialysis venous system patency analysis trial signi arteriovenou technique failure cvi-q venous incompetence incompetence questionnaire perforating veins system ablation arm avfs baseline qa strip endovenou hemodialysi procedure forearm avfs table endovenous laser ablation signi ficantly tibial perforator access ow change perforating outcome dutch operation follow-up vessel artery diameter quality preoperative laser difference kidney ficant netherland volume ow method strip group month j vasc surg access blood flow sclerotherapy laatste twee weken cryoprobe randomized