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    Water content probe
    21.
    发明申请
    Water content probe 审中-公开
    含水量探头

    公开(公告)号：US20050203438A1

    公开(公告)日：2005-09-15

    申请号：US11109370

    申请日：2005-04-19

    申请人： Kim Manwaring ,  Mark Manwaring

    发明人： Kim Manwaring ,  Mark Manwaring

    IPC分类号： A61B5/00 ,  A61B5/03 ,  A61B5/05 ,  A61B5/053 ,  A61B8/00

    CPC分类号： A61B5/0537 ,  A61B5/0031 ,  A61B5/031 ,  A61B5/0538 ,  A61B5/4869 ,  A61B5/6864

    摘要： A method and system to determine brain stiffness is disclosed. A probe to measure tissue water content is inserted through an aperture (burr hole) in the cranium into brain tissue. The probe has two electrically separated plate conductors with a dielectric which forms a capacitor plane. One conductor has a surface mount resistor to allow exact impedance matching to the core of a coaxial cable. The other conductor attaches electrically to the shield of the coaxial cable. The probe is stabilized in the brain tissue through a plastic ventriculostomy bolt which has been secured by screw tapping into the cranium. The coaxial cable connects to a spectrum analyzer. Brain water content and blood congestion alter the resonant frequency of the probe, allowing a realtime readout of apparent tissue water content. By monitoring the momentary shift in center resonant frequency or, alternatively, the standing wave ratio slightly off resonant frequency, a beat-to-beat pulsatile waveform is derived relating to the perfusion of the brain. A strain gauge intracranial pressure sensor (ICP) is separately affixed through the bolt and adjacent to the water content probe. By comparing the phase angle or lag time difference between the pressure tracing and the perfusion tracing, a realtime measurement of organ stiffness or compliance is derived.

    摘要翻译： 公开了一种确定脑僵硬度的方法和系统。 测量组织含水量的探针通过颅骨中的孔（钻孔）插入脑组织。 探头具有两个电隔离的板状导体，其中形成电容器平面的电介质。 一个导体具有表面贴装电阻器，以允许与同轴电缆芯的精确阻抗匹配。 另一导体电连接到同轴电缆的屏蔽。 探针通过塑料心室造口术螺栓稳定在脑组织中，该螺栓已经通过螺钉攻丝入颅骨而被固定。 同轴电缆连接到频谱分析仪。 脑水含量和血液充血会改变探头的共振频率，从而实时显示组织含水量。 通过监测中心谐振频率的瞬时偏移，或者替代地，驻波比稍微偏离谐振频率，导出与脑的灌注相关的搏动搏动波形。 应变计颅内压传感器（ICP）通过螺栓分别固定在水分探头附近。 通过比较压力跟踪和灌注跟踪之间的相位角或滞后时间差，得出器官刚度或依从性的实时测量。

    Thermal resecting loop
    22.
    发明授权
    Thermal resecting loop 有权
    热切环

    公开(公告)号：US09107666B2

    公开(公告)日：2015-08-18

    申请号：US13545922

    申请日：2012-07-10

    申请人： Kim Manwaring ,  David McNally

    发明人： Kim Manwaring ,  David McNally

    IPC分类号： A61B18/04 ,  A61B18/08 ,  A61B18/10 ,  A61B18/00

    CPC分类号： A61B18/082 ,  A61B18/10 ,  A61B2018/00107 ,  A61B2018/00601 ,  A61B2018/00625 ,  A61B2018/0063 ,  A61B2018/00642 ,  A61B2018/00815 ,  A61B2018/00821

    摘要： A thermal surgical instrument comprising a conductor having a ferromagnetic material in electrical communication with the conductor, such that passage of electrical energy through the conductor causes substantially uniform heating of the ferromagnetic material sufficient to produce a desired therapeutic tissue effect is provided. The conductor may be shaped to facilitate resection of tissue from a patient and include a support to provide increase rigidity to the loop so that the conductor better resists bending during use. The ferromagnetic material quickly heats and cools in response to a controllable power delivery source. The thermal surgical instrument can be used for substantially simultaneously resecting tissue with hemostasis.

    摘要翻译： 一种热外科器械，其包括具有与导体电连通的铁磁材料的导体，使得电能通过导体导致铁磁材料的基本均匀加热足以产生所需的治疗性组织效应。 导体可以被成形为便于从患者切除组织，并且包括支撑件以提供对环的增加的刚度，使得导体在使用期间更好地抵抗弯曲。 铁磁材料响应于可控的电力输送源而快速加热并冷却。 热外科手术器械可用于大体上同时切除止血组织。