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    • 5. 发明授权
    • Implantable cardiac rhythm management device for assessing status of CHF patients
    • 用于评估CHF患者状态的植入式心律管理装置
    • US06459929B1
    • 2002-10-01
    • US09547519
    • 2000-04-12
    • Donald L. HopperJeffrey E. StahmannBruce R. JonesJames P. Nelson
    • Donald L. HopperJeffrey E. StahmannBruce R. JonesJames P. Nelson
    • A61B50205
    • A61N1/36585A61N1/3627
    • A method and apparatus for providing congestive heart failure therapy status. An electronic device, preferably a cardiac rhythm management device, capable of measuring transthoracic impedance and for sensing a level of physical activity is implanted in a patient. The transthoracic impedance signal is processed to obtain an estimate of the subject's minute ventilation, respiratory rate, tidal volume, inspiratory rate and expiratory rate. From accelerometer measured activity, an estimate is obtained of oxygen uptake, carbon dioxide production and work rate. Ratios of tidal volume to respiratory rate, tidal volume to inspiratory time, tidal volume to expiratory time, heart rate to minute ventilation, respiratory rate to minute ventilation, tidal volume to minute ventilation, minute ventilation to oxygen uptake, minute ventilation to carbon dioxide production, minute ventilation to work rate, heart rate to work rate, oxygen uptake to heart rate and other ratios are meaningful status indicators for assessing the efficacy of particular therapy regimens to CHF patients.
    • 一种用于提供充血性心力衰竭治疗状态的方法和装置。 将能够测量经胸阻抗并感测身体活动水平的电子设备,优选心脏节律管理装置植入患者体内。 处理经胸阻抗信号,以获得受试者的分钟通气量,呼吸频率,潮气量,吸气率和呼气率的估计。 从加速度计测量的活动,得到氧气摄取,二氧化碳生产和工作率的估计。 潮气量对呼吸频率,潮气量吸气时间,潮气量与呼气时间,心率与分钟通气量的比例,呼吸频率到每分钟通气量,潮气量到分钟通气量,分钟通气至吸氧量,分钟通气至二氧化碳生成 ,分钟通气到工作率,心率到工作率,氧摄取对心率和其他比例是评估特定治疗方案对CHF患者的疗效的有意义的状态指标。