Abstract
The main purpose of ultrasound for vascular access (VA) is to evaluate the blood vessel before VA creation as well as to evaluate the condition of VA and the development of complications after VA creation. In the former case, it is used to judge the possibility of creating arteriovenous fistula, arteriovenous graft, or subcutaneously fixed superficial artery. In the latter case, VA quality can be judged by observing the blood flow or the peripheral vascular resistance index (RI) and the stenotic lesion. Ultrasound-assisted VA evaluation is a remarkable examination method that enables observation of the function and morphology of VA noninvasively.
