AN INVIVO-LIKE PHANTOM FOR EVALUATING THE CLINICAL USE OF DUPLEX SCANNING AND COLOR-CODED DOPPLER DEVICES (CCDD)

To evaluate the accuracy and reliability of colour-coded Doppler devices (CCDD) for practical use, a circulatory phantom with in vivo characteristics was developed. The experimental design consists of a piston-diaphragm metering pump with an adjustable piston volume and frequency of stroke as well as silicone tubings with different elasticity and diameters comparable with cadaver arteries. Depending on physiological conditions, blood as a circulating fluid and the surrounding soft tissues of the artery near the Doppler probe should be employed. The transducer should be manually guided. Thus, comparable to physiological frequency spectral displays, different types of wave forms (e. g. monophasic, triphasic) were initiated to analyse the reliability of CCDDs for practical use.