The Effect of LIPUS on the Maturation of Newly Constructed Autogenous AVF

The LIPUS intervention group for arteriovenous fistula should receive forearm wearable portable low-intensity pulse ultrasound （LIPUS） intervention at the anastomotic site no more than 3 days after suture removal two weeks after the fistula surgery. If the ultrasound examination indicates the presence of stenosis in the outflow tract, the intervention should also be performed at the same time. It belongs to non-invasive extracorporeal intervention, with three times a week （during dialysis） for 20 minutes each time. The sound intensity is 350mW/cm2, the pulse frequency is 1MHz, the pulse repetition frequency is 100Hz, the pulse frequency is 100 times, and the treatment period is 12 weeks.