目前已有明显的例子证明,临床级超声既能在离体组织内产生空化效应,也能于某些情况下在活体内产生空化效应。瞬态和持续的空化都是潜在的危害,它们都能破坏局部的细胞,也能通过自由基产生化学反应。虽然这些危害并不是致命的,但自由基的活动会影响到细胞的活性,特别是当化学反应发生在细胞膜组份中时,其作用尤为明显;反之,当超 At present, there are clear examples that clinical ultrasound can produce both cavitation effects in isolated tissues and cavitation effects in vivo in some cases. Transient and persistent cavitation are potential hazards. They both destroy local cells and produce chemical reactions through free radicals. Although these hazards are not fatal, the activity of free radicals can affect the activity of cells, especially when chemical reactions occur in the cell membrane components. The effect is particularly obvious;