A REVIEW OF THE PHYSICAL-PROPERTIES AND BIOLOGICAL EFFECTS OF THE HIGH AMPLITUDE ACOUSTIC FIELDS USED IN EXTRACORPOREAL LITHOTRIPSY

被引:161
作者
COLEMAN, AJ
SAUNDERS, JE
机构
[1] Medical Physics Department, St Thomas' Hospital, London
关键词
MEDICAL ULTRASOUND; LITHOTRIPSY; CAVITATION;
D O I
10.1016/0041-624X(93)90037-Z
中图分类号
O42 [声学];
学科分类号
070206 ; 082403 ;
摘要
Extracorporeal shockwave lithotripsy (ESWL) has now been used for more than a decade in the treatment of urinary stone disease. During this period there has been a wide range of studies on the physical properties of the high-amplitude focussed fields used in ESWL and the biological effects of exposure to such fields, including their ability to fragment hard concretions. These studies form a distinct body of knowledge whose relevance to the broader literature on biological effects from lower amplitude exposures has yet to be fully evaluated. This review attempts to present the main results of biological-effects studies in ESWL along with what is known of the physical properties of lithotripsy fields with the aim of assisting this evaluation. In general, the reported biological effects of lithotripsy fields are compatible with those that have been observed at those lower amplitudes of focussed pulsed ultrasound in which transient cavitation is the dominant mechanism of interaction. The relatively large amplitudes and low frequencies in ESWL, however, make it a more potent generator of transient cavitation than most other forms of medical ultrasound. Biological-effects studies with lithotripsy fields may, therefore, be expected to extend our understanding of the nature of transient cavitation and, in particular, its effects in mammalian tissue.
引用
收藏
页码:75 / 89
页数:15
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