Vascular Waveform Analysis of Flap-Feeding Vessels Using Color Doppler Ultrasonography

Figure 1

Novel classification of the vascular waveform of flap-feeding vessels in Doppler ultrasonography. D-1a type: normal waveforms in which systolic crests rise steeply, followed by reflux components; D-1b type: normal waveforms in which systolic crests rise steeply but reflux components are lost, and a notch is noted between systolic and diastolic waves; D-2 type: peaks are formed, but the width of systolic crests is wider than normal, reflux components are lost, and no notch is present between systolic and diastolic waves; D-3 type: systolic crests are moderate and form no peak; and D-4 type: moderate continuous waveforms.