Chinese hamster V-79 cells, exposed in polystyrene tubes for 5 min to 1 MHz continous wave ultrasound, were lysed more by a 10W/cm/sup 2/ than a 5W/cm/sup 2/ intensity. Higher atmospheric pressure was needed to eliminate lysis with the former relative to the latter intensity, but lysis by 10W/cm/sup 2/ was completely eliminated with 2 atmospheres of hydrostatic pressure. The reduction in lysis per unit increase in atomspheric pressure was comparable for both ultrasound intensities.
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Ciaravino et al. (1981) studied this question.
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