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    • 58. 发明授权
    • High velocity tissue sample cutter
    • 高速组织样品切割机
    • US5476099A
    • 1995-12-19
    • US299196
    • 1994-08-31
    • Donald E. RobinsonJoseph E. YoungMichael S. Banik
    • Donald E. RobinsonJoseph E. YoungMichael S. Banik
    • A61B10/06A61B10/00A61B17/22A61B17/28
    • A61B10/06A61B17/2909A61B2017/2923A61B2017/2946
    • Samples of tissue are cleanly severed from locations deep within the body of a patient. A catheter has a catheter body constructed for placement through a narrow passageway and includes at its distal portion a cutter. The cutter includes a moveable cutting member that can be controllably actuated to sever the tissue sample from the location deep within the body. A firing mechanism is provided at a proximal end of the catheter. The firing mechanism includes, for example, a moveable actuating element connected to the cutting member and a preaccelerator element. The preaccelerator element is accelerated to high speed before transferring force to the actuating element to cause the actuating element to accelerate to rapidly actuate the moveable cutting member and cleanly cut the sample. The cutting element may be a jaw-form that has sharp end cutting edges and is constructed to provide shearing action.
    • 组织样本从患者体内深处的位置干净地切断。 导管具有构造成用于通过狭窄通道放置并且在其远端部分包括切割器的导管主体。 切割器包括可移动的切割构件,其可被可控地致动以将组织样本从体内深处的位置切断。 在导管的近端处设置有击发机构。 击发机构包括例如连接到切割构件的可移动致动元件和预加速器元件。 在将力传递到致动元件之前,预加速器元件被加速到高速,以使致动元件加速以快速致动可移动切割构件并干净地切割样品。 切割元件可以是具有尖端切割边缘并被构造成提供剪切动作的颚形。