| Автор | Murtuza Lokhandwalla |
| Автор | Bradford Sturtevant |
| Дата выпуска | 2000-07-01 |
| dc.description | Focused shock waves administered during extracorporeal shock-wave lithotripsy (ESWL) cause stone fragmentation. The process of stone fragmentation is described in terms of a dynamic fracture process. As is characteristic of all brittle materials, fragmentation requires nucleation, growth and coalescence of flaws, caused by a tensile or shear stress. The mechanisms, operative in the stone, inducing these stresses have been identified as spall and compression-induced tensile microcracks, nucleating at pre-existing flaws. These mechanisms are driven by the lithotripter-generated shock wave and possibly also by cavitation effects in the surrounding fluid. In this paper, the spall mechanism has been analysed, using a cohesive-zone model for the material. The influence of shock wave parameters, and physical properties of stone, on stone comminution is described. The analysis suggests a potential means to exploit the difference between the stone and tissue physical properties, so as to make stone comminution more effective, without increasing tissue damage. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | Fracture mechanics model of stone comminution in ESWL and implications for tissue damage |
| Тип | paper |
| DOI | 10.1088/0031-9155/45/7/316 |
| Electronic ISSN | 1361-6560 |
| Print ISSN | 0031-9155 |
| Журнал | Physics in Medicine and Biology |
| Том | 45 |
| Первая страница | 1923 |
| Последняя страница | 1940 |
| Аффилиация | Murtuza Lokhandwalla; Graduate Aeronautical Laboratories, California Institute of Technology, Pasadena, California, USA |
| Аффилиация | Bradford Sturtevant; Graduate Aeronautical Laboratories, California Institute of Technology, Pasadena, California, USA |
| Выпуск | 7 |
