Photoacoustic removal of occlusions from blood vessels
    3.
    发明申请
    Photoacoustic removal of occlusions from blood vessels 审中-公开
    光声消除血管闭塞

    公开(公告)号:US20050021013A1

    公开(公告)日:2005-01-27

    申请号:US10241741

    申请日:2002-09-10

    摘要: Partial or total occlusions of fluid passages within the human body are removed by positioning an array of optical fibers in the passage and directing treatment radiation pulses along the fibers, one at a time, to generate a shock wave and hydrodynamic flows that strike and emulsify the occlusions. A preferred application is the removal of blood clots (thrombi and emboli) from small cerebral vessels to reverse the effects of an ischemic stroke. The operating parameters and techniques are chosen to minimize the amount of heating of the fragile cerebral vessel walls occurring during this photoacoustic treatment. One such technique is the optical monitoring of the existence of hydrodynamic flow generating vapor bubbles when they are expected to occur and stopping the heat generating pulses propagated along an optical fiber that is not generating such bubbles.

    摘要翻译: 通过将光纤阵列定位在通道中并沿着纤维一次一个地引导处理辐射脉冲来去除人体内的流体通道的部分或完全闭塞,以产生冲击波和流体动力学流动,其冲击和乳化 闭塞。 优选的应用是从小脑血管移除血块(血栓和栓塞)以逆转缺血性卒中的作用。 选择操作参数和技术以最小化在该光声处理期间发生的脆弱的脑血管壁的加热量。 一种这样的技术是当期望发生流体动力学流动产生蒸汽气泡的存在并且阻止沿着不产生这种气泡的光纤传播的发热脉冲时的光学监测。