Blood Pressure Measurement with Ultrasound (Doppler Occlusion Pressure Measurement)

Communication of the connection between blood pressure measurements and blood flow examinations using the ultrasound Doppler method

The experiment demonstrates the connection between blood pressure measurements and blood flow examinations using the ultrasound Doppler method. To do this, a vessel on a realistic arm model is subjected to a defined pressure using a modified blood pressure cuff and the blood flow parameters (average and maximum frequency) are measured.

Keywords: Doppler sonography, blood flow velocity, pulse curves, indirect, non-invasive blood pressure measurement, peripheral occlusive diseases

Ultrasound Doppler methods (Doppler sonography) are the most important methods in the non-invasive diagnosis of peripheral vascular diseases. The determination of the vascular occlusion pressure (blood pressure measurement) is carried out in a similar way to the conventional blood pressure measurement according to Riva-Roci and Korotkoff. However, the Doppler method makes it possible to record the flow conditions more quantitatively, in different vessels and also in the case of occlusions. This allows the systolic occlusion pressure used for diagnosis to be determined much more precisely. The method is mainly used in the diagnosis of peripheral arterial occlusive diseases. The experiment will examine the technical implementation of the measurement and the qualitative and quantitative change in the blood flow curves for different occlusion pressures. The centrifugal pump makes it possible to examine both continuous and pulsatile flows.

Frequency-pressure diagram

The diagram shows the dependence of the mean and maximum frequency on the pressure on the blood vessel for a fixed flow velocity.

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