Doppler Flow Waveforms: Triphasic, Biphasic, Monophasic скачать в хорошем качестве

Doppler Flow Waveforms: Triphasic, Biphasic, Monophasic

#DopplerFlow #VascularHealth #PeripheralArterialDisease #Waveforms #Triphasic #Biphasic #Monophasic #BloodFlow #Stenosis #MedicalEducation #DrGregoryWeir Here is an overview of Doppler Flow waveforms discussed in the video, relevant to patients with peripheral arterial disease: *Doppler Flow Basics* A handheld Doppler is used. The graph has a zero flow baseline. Above the baseline is antegrade flow. Below the baseline is retrograde flow or reversed flow. During systole, the heart pushes blood towards the feet (antegrade flow). During diastole, there is a period of retrograde flow. Due to elastic recoil, there's a short period of antegrade flow in late diastole. *Triphasic Waveform* Recognised audibly. Displayed as three distinct components. Includes antegrade flow during systole. Features early diastolic flow reversal (retrograde flow). Has a small forward flow reflective wave in late diastole. Indicates normal flow in elastic arteries with no stenosis or obstruction. *Biphasic Waveform* Recognised audibly. Displayed as two distinct components. Has a systolic upstroke indicating antegrade flow. Includes early diastolic flow reversal (retrograde flow). The small forward flow in late diastole, seen in triphasic waveforms, is absent. Indicates a loss of elasticity or a low-grade stenosis. *Monophasic Waveform* Recognised audibly. Displayed as a single distinct component. Has a systolic upstroke. Is unidirectional, usually above the zero flow baseline. Early diastolic flow reversal is absent. The small forward flow in late diastole is absent. Does not cross the zero flow baseline. Indicates an obstruction or critical stenosis proximal to the area.