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    • 3. 发明授权
    • Method and apparatus for monitoring and controlling tissue temperature and lesion formation in radio-frequency ablation procedures
    • 用于监测和控制射频消融程序中组织温度和病变形成的方法和装置
    • US06423057B1
    • 2002-07-23
    • US09488878
    • 2000-01-21
    • Ding Sheng HeMichael BosnosFrank Marcus
    • Ding Sheng HeMichael BosnosFrank Marcus
    • A61B1804
    • A61B18/1206A61B2017/00026A61B2017/00039A61B2017/00084A61B2018/00755A61B2018/00791A61B2018/00875
    • Impedance and capacitance-related parameters are monitored in the electrical circuit of a tissue-ablation apparatus wherein RF electrical power is administered at predetermined frequencies. Tissue temperature has been found to correlate well with low-frequency impedance, or with the resistive component of impedance at any frequency. Therefore, one or both of these parameters are calculated and tracked during the ablation procedure to estimate tissue temperature. Similarly, tissue lesion formation has been found to correlate well with changes in the capacitive component of tissue impedance. Thus, this parameter can be used to track tissue lesion formation during the ablation procedure. The ratio of tissue-to-blood interface with the ablation electrode is estimated by measuring impedance at a very low frequency and a very high frequency. The difference between these two values divided by the high-frequency value is taken to be a measure of such ratio. Alternatively, other electrical parameters indicative of changes in the capacitive component of the system may be measured and the ratio is calculated as a function of these changes with respect to a baseline value.
    • 在组织消融装置的电路中监测阻抗和电容相关参数,其中以预定频率施加RF电力。 已经发现组织温度与低频阻抗或任何频率处的阻抗电阻分量良好相关。 因此,在消融过程期间计算和跟踪这些参数中的一个或两个以估计组织温度。 类似地,已经发现组织损伤形成与组织阻抗的电容分量的变化良好相关。 因此,该参数可用于跟踪消融过程期间的组织损伤形成。 通过在非常低的频率和非常高的频率下测量阻抗来估计组织与血液界面与消融电极的比例。 将这两个值除以高频值之间的差值作为该比例的量度。 或者,可以测量指示系统的电容分量变化的其它电参数,并且根据这些基线值的变化来计算该比值。
    • 4. 发明授权
    • Optimization method for cardiac resynchronization therapy
    • 心脏再同步治疗的优化方法
    • US06978184B1
    • 2005-12-20
    • US10629881
    • 2003-07-29
    • Frank I. MarcusDing Sheng He
    • Frank I. MarcusDing Sheng He
    • A61B20060101A61B5/11A61N1/00A61N1/05A61N1/362A61N1/365A61N1/368
    • A61B5/1107A61B5/6869A61B5/7217A61N1/3627A61N1/36542A61N1/3682A61N1/3684
    • The patterns of contraction and relaxation of the heart before and during left ventricular or biventricular pacing are analyzed and displayed in real time mode to assist physicians to screen patients for cardiac resynchronization therapy, to set the optimal A-V or right ventricle to left ventricle interval delay, and to select the site(s) of pacing that result in optimal cardiac performance. The system includes an accelerometer sensor; a programmable pace maker, a computer data analysis module, and may also include a 2D and 3D visual graphic display of analytic results, i.e. a Ventricular Contraction Map. A feedback network provides direction for optimal pacing leads placement. The method includes selecting a location to place the leads of a cardiac pacing device, collecting seismocardiographic (SCG) data corresponding to heart motion during paced beats of a patient's heart, determining hemodynamic and electrophysiological parameters based on the SCG data, repeating the preceding steps for another lead placement location, and selecting a lead placement location that provides the best cardiac performance by comparing the calculated hemodynamic and electrophysiological parameters for each different lead placement location.
    • 以实时模式分析和显示左心室或双心室起搏前后心脏收缩和松弛的模式,以协助医师筛选患者心脏再同步治疗,将最佳AV或右心室设置为左心室间隔延迟, 并选择导致最佳心脏性能的起搏部位。 该系统包括加速度传感器; 可编程步调器,计算机数据分析模块,还可以包括分析结果的2D和3D视觉图形显示,即心室收缩图。 反馈网络为最佳起搏线索位置提供了方向。 所述方法包括选择放置心脏起搏装置的引线的位置,在患者心脏的起搏节拍期间收集对应于心脏运动的心脏断层图(SCG)数据,基于SCG数据确定血流动力学和电生理参数,重复前述步骤 通过比较每个不同引线放置位置的计算血液动力学和电生理参数,选择提供最佳心脏性能的引导位置位置。
    • 8. 发明申请
    • Mapping and Ablation Method for the Treatment of Ventricular Tachycardia
    • 心室心动过速治疗的绘图和消融方法
    • US20080281391A1
    • 2008-11-13
    • US11597082
    • 2005-05-17
    • David MacAdamDing Sheng He
    • David MacAdamDing Sheng He
    • A61B18/12
    • A61B18/1492A61B5/042A61B2018/00214A61B2018/00839
    • An apparatus for mapping and/or ablating tissue includes a braided conductive member that that may be inverted to provide a ring-shaped surface. When a distal tip of the braided conductive member is retracted within the braided conductive member, the lack of a protrusion allows the ring-shaped surface to contact a tissue wall such as a cardiac wall. In an alternative configuration, the braided conductive member may be configured with the distal portion forming a proboscis that can be used to stably position the braided conductive member relative to a blood vessel, such as a ventricular outflow tract. The braided conductive member has a plurality of electronically active sites that may be accessed individually for stable mapping over a broad area for stable mapping or ablation to form broad and deep lesions.
    • 用于映射和/或消融组织的装置包括可被倒置以提供环形表面的编织导电构件。 当编织导电构件的远侧末端缩回到编织导电构件内时,缺少突起允许环形表面接触诸如心脏壁的组织壁。 在替代配置中,编织导电构件可构造成具有形成长鼻的远端部分,其可用于相对于诸如心室流出道的血管来稳定地定位编织导电构件。 编织导电构件具有多个电子活性位点,其可以单独访问以在广泛区域上稳定映射以用于稳定的映射或消融以形成宽而深的损伤。