Please read the 2020 concensus statement on interpretation of peripheral Doppler waveforms. It's monophasic. If you know the baseline and it never crosses it; it's monophasic. Yes it could by a waveform from a biphasic or triphasic artery that responds to vasodilation, but the waveform IS monphasic.
The machine used is very modern. The baseline on arterial waveforms plays tomato roles. It does show direction, however it also shows distal resistance. This waveform has a sharp upstroke, a rapid downstroke and a reversal component. Move the baseline and everyone would say simple tri-phasic. The baseline is below because the distal resistance has changed - post exercise which is a normal part of auto-regulation.
Lester Fernandez - 10 years ago
It is a biphasic waveform showing a systolic & diastolic component. the absence of a negative component demonstrates the antiquity of the machine utilized.
Timothy McKeever - 10 years ago
I conclude that the waveform is biphasic because of the the sharp rise to peak systolic as well as the sharp decrease to end diastolic with a dichotic notch. I do not believe that it is triphasic because you do not see a flow reversal below the baseline. This waveform is arterial which is the most defining morphology.
Please read the 2020 concensus statement on interpretation of peripheral Doppler waveforms. It's monophasic. If you know the baseline and it never crosses it; it's monophasic. Yes it could by a waveform from a biphasic or triphasic artery that responds to vasodilation, but the waveform IS monphasic.
Lester,
The machine used is very modern. The baseline on arterial waveforms plays tomato roles. It does show direction, however it also shows distal resistance. This waveform has a sharp upstroke, a rapid downstroke and a reversal component. Move the baseline and everyone would say simple tri-phasic. The baseline is below because the distal resistance has changed - post exercise which is a normal part of auto-regulation.
It is a biphasic waveform showing a systolic & diastolic component. the absence of a negative component demonstrates the antiquity of the machine utilized.
I conclude that the waveform is biphasic because of the the sharp rise to peak systolic as well as the sharp decrease to end diastolic with a dichotic notch. I do not believe that it is triphasic because you do not see a flow reversal below the baseline. This waveform is arterial which is the most defining morphology.