The reflection of pressure pulses from rubber tube junctions, covering a range of hydrodynamic mismatching, was determined by an impulse technique. A 5 ms pressure impulse generated in the parent vessel was detected, together with any reflected pulse, by means of a catheter-tip pressure manometer. Similar measurements were carried out on the aortic trifurcation of an anaesthetised dog. In both cases the measured reflections agreed well with those calculated from area and elasticity measurements.
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