Duplex Ultrasound Evaluation of Hemodialysis Access: A Detailed Protocol
Figure 3
The radial artery just proximal to a Brescia-Cimino fistula demonstrates spectral broadening and diastolic flow seen characteristically in arterial beds with low resistance outflow in addition to elevation of both PSV and EDV. In the absence of dialysis access, a normal radial artery will exhibit triphasic waveforms with no spectral broadening and PSV >40 cm/sec.
