Color Doppler ultrasonography imaging to guide transluminal angioplasty of venous stenosis

摘要: Color Doppler ultrasonography imaging to guide transluminal angioplasty of venous stenosis. Background The objective access surveillance is the early recognition dysfunction in order be able correct stenosis by or surgery before thrombosis occurs. advent color has enabled studies (CDU) for guidance percutaneous (PTA). aim present study was investigate whether alone can safely and effectively used diagnose vascular graft stenoses subsequent PTA. Methods Using ultrasound velocity dilution method, we measured blood flow (Qa) during first hour hemodialysis every month patients with grafts as access. When decrease Qa from baseline value 40% more, CDU performed immediately followed PTA presence a more than 50%. then dialysis after one later. Repeated-measure analysis variance applied evaluate late (after month) effect Results Twelve PTAs were under nine led elimination its reduction (two cases). mean 809 ± 263 mL/min at baseline, 468 153 PTA, 820 281 difference between pre-PTA post-PTA values highly significant ( P = 0.672). There no relevant complications directly related procedure. Conclusions procedure effective diagnosis It could improve screening avoiding risks exposure ionizing radiation adverse reactions contrast media.