Platelet aggregation induced by ultrasound under specialized conditions in vitro

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Science  03 Aug 1979:
Vol. 205, Issue 4405, pp. 505-507
DOI: 10.1126/science.451616


Human platelets were induced by 2.1-megahertz ultrasound to form aggregates around gas-filled pores in membranes immersed in platelet-rich plasma. The spatial peak intensities required were only about 16 to 32 milliwatts per square centimeter. Ultrasound generated by a medical Doppler device, whose intensity exceeded this, induced aggregate formation under the same conditions.