Vascular health and risk management
Doppler Ultrasound-Derived Blood Flow Parameters Associated with Significant Arteriovenous Fistula Stenosis in a Large Vietnamese Hemodialysis Cohort
By Pham HV, Tran NV, Tran HTB and 1 others.
Abstract
Purpose
Arteriovenous fistula (AVF) stenosis is a major cause of vascular access dysfunction in hemodialysis patients. This study evaluated the associations between Doppler ultrasound-derived blood flow parameters measured at different AVF sites and Doppler-defined significant AVF stenosis.
Methods
This retrospective cohort study included adult hemodialysis patients with native AVFs who underwent Doppler ultrasound evaluation at Cho Ray Hospital, Vietnam. Blood flow parameters were measured at the brachial artery, anastomosis, 5 cm from the anastomosis, and 10 cm from the anastomosis. Doppler-defined significant stenosis was defined as ≥50% luminal narrowing compared with the adjacent normal vessel segment. Univariable and multivariable logistic regression analyses were performed to evaluate associations between Doppler flow parameters and significant stenosis.