Apparatus and method for non-invasively measuring caridac output
    1.
    发明授权
    Apparatus and method for non-invasively measuring caridac output 有权
    非侵入性测量caridac输出的装置和方法

    公开(公告)号:US08096297B2

    公开(公告)日:2012-01-17

    申请号:US12702596

    申请日:2010-02-09

    IPC分类号: A61M15/00 A61M16/00 A61B5/00

    摘要: Apparatus and methods for non-invasively determining cardiac output using partial re-breathing techniques are disclosed in which the apparatus is constructed with an instantaneously adjustable deadspace for accommodating differences in breathing capacities of various patients. The apparatus is constructed of inexpensive elements, including a single two-way valve which renders the apparatus very simple to use and inexpensive so that the unit may be readily disposable. The method of the invention provides a novel means of estimating cardiac output based on alveolar CO2 values rather than end-tidal CO2 values as previously practiced. A program for calculating cardiac output is also disclosed.

    摘要翻译: 公开了使用部分再呼吸技术非侵入性地确定心输出量的装置和方法,其中该装置构造有瞬时可调的死区,以适应各种患者的呼吸能力差异。 该设备由便宜的元件构成,包括单个双向阀,其使得该设备使用起来非常简单且便宜,使得该单元可以容易地被一次性使用。 本发明的方法提供了一种基于肺泡二氧化碳值估计心输出量的新方法,而不是如先前所述的潮汐CO 2值。 还公开了一种用于计算心输出量的程序。

    Reliability-enhanced apparatus operation for re-breathing and methods of effecting same
    4.
    发明授权
    Reliability-enhanced apparatus operation for re-breathing and methods of effecting same 失效
    用于再呼吸的可靠性增强的装置操作及其影响的方法

    公开(公告)号:US07066176B2

    公开(公告)日:2006-06-27

    申请号:US10861543

    申请日:2004-06-04

    IPC分类号: A62B9/02

    摘要: Methods and apparatus for enhancing reliability of, and monitoring, the operation of airway valves to enhance patient safety. Pneumatic control line pressure (positive or negative) for actuation of the airway valve may be specified at a given magnitude or within a selected range and monitored continuously. Reduced or excessive pressure may be compensated by actuation of a pressure source or a bleed valve, and monitoring may be effected so as to warn the user of any deviation from the range, or deviations of selected magnitudes or frequencies or a combination thereof. The inspired volume of CO2 may be monitored using air flow and CO2 sensing, with detection of excessive CO2 volume triggering a warning. Similarly, measured end-tidal or end-inspired CO2 or other appropriate measures of CO2 concentration may be employed as a warning trigger. Other driving energy sources for airway valves, and monitoring thereof, are also disclosed.

    摘要翻译: 提高气道瓣膜运行可靠性和监测的方法和装置,以提高患者的安全性。 用于致动气道瓣膜的气动控制管路压力(正或负)可以在给定量级或选定范围内被指定并连续监测。 可以通过致动压力源或放气阀来补偿减压或过大的压力,并且可以进行监控以便警告使用者偏离范围或选定幅度或频率的偏差或其组合的任何偏差。 可以使用空气流和CO 2感测来监测CO 2 2的启发体积,同时检测到过大的CO 2 2体积触发警告。 类似地,可以使用测量的潮气或末端启发CO 2或其它适当的CO 2浓度测量作为警告触发。 还公开了用于气道瓣膜的其它驱动能源及其监视。

    Method, apparatus and system for removing motion artifacts from measurements of bodily parameters
    5.
    发明授权
    Method, apparatus and system for removing motion artifacts from measurements of bodily parameters 失效
    用于从身体参数测量中去除运动伪影的方法,装置和系统

    公开(公告)号:US06519486B1

    公开(公告)日:2003-02-11

    申请号:US09546260

    申请日:2000-04-10

    IPC分类号: A61B500

    摘要: A method for removing motion artifacts from devices for sensing bodily parameters and apparatus and system for effecting same. The method includes analyzing segments of measured data representing bodily parameters and possibly noise from motion artifacts. Each segment of measured data may correspond to a single light signal transmitted and detected after transmission or reflection through bodily tissue. Each data segment is frequency analyzed to determine up to three candidate peaks for further analysis. Each of the up to three candidate frequencies may be filtered and various parameters associated with each of the up to three candidate frequencies are calculated. The best frequency, if one exists, is determined by arbitrating the candidate frequencies using the calculated parameters according to predefined criteria. If a best frequency is found, a pulse rate and SpO2 may be output. If a best frequency is not found, other, conventional techniques for calculating pulse rate and Spo2 may be used. The above method may be applied to red and infrared pulse oximetry signals prior to calculating pulse rate and/or pulsatile blood oxygen concentration. Apparatus and systems disclosed are configured to perform methods disclosed according to the invention.

    摘要翻译: 一种用于从用于感测身体参数的装置和用于实现其的设备和系统的装置中去除运动假象的方法。 该方法包括分析表示身体参数和可能的运动伪影噪声的测量数据的段。 测量数据的每一段可对应于通过身体组织透射或反射后传输和检测的单个光信号。 对每个数据段进行频率分析,以确定最多三个候选峰进行进一步分析。 可以对最多三个候选频率中的每一个进行滤波,并且计算与最多三个候选频率中的每一个相关联的各种参数。 通过使用根据预定准则的计算参数来仲裁候选频率来确定最佳频率(如果存在)。 如果发现最佳频率,则可以输出脉率和SpO2。 如果没有找到最佳频率,则可以使用用于计算脉率和Spo2的其它常规技术。 在计算脉搏率和/或脉动血氧浓度之前,上述方法可以应用于红色和红外脉搏血氧饱和度信号。 公开的设备和系统被配置为执行根据本发明公开的方法。

    Method, apparatus and system for removing motion artifacts from measurements of bodily parameters
    10.
    发明授权
    Method, apparatus and system for removing motion artifacts from measurements of bodily parameters 失效
    用于从身体参数测量中去除运动伪影的方法,装置和系统

    公开(公告)号:US07072702B2

    公开(公告)日:2006-07-04

    申请号:US10873758

    申请日:2004-06-22

    IPC分类号: A61B5/00

    摘要: A method for removing motion artifacts from devices for sensing bodily parameters and apparatus and system for effecting same. The method includes analyzing segments of measured data representing bodily parameters and possibly noise from motion artifacts. Each segment of measured data may correspond to a single light signal transmitted and detected after transmission or reflection through bodily tissue. Each data segment is frequency analyzed to determine up to three candidate peaks for further analysis. Each of the up to three candidate frequencies may be filtered and various parameters associated with each of the up to three candidate frequencies are calculated. The best frequency, if one exists, is determined by arbitrating the candidate frequencies using the calculated parameters according to predefined criteria. If a best frequency is found, a pulse rate and SPO2 may be output. If a best frequency is not found, other, conventional techniques for calculating pulse rate and SpO2 may be used. The above method may be applied to red and infrared pulse oximetry signals prior to calculating pulse rate and/or pulsatile blood oxygen concentration. Apparatus and systems disclosed are configured to perform methods disclosed according to the invention.

    摘要翻译: 一种用于从用于感测身体参数的装置和用于实现其的设备和系统的装置中去除运动假象的方法。 该方法包括分析表示身体参数和可能的运动伪影噪声的测量数据的段。 测量数据的每一段可对应于通过身体组织透射或反射后传输和检测的单个光信号。 对每个数据段进行频率分析,以确定最多三个候选峰进行进一步分析。 可以对最多三个候选频率中的每一个进行滤波,并且计算与最多三个候选频率中的每一个相关联的各种参数。 通过使用根据预定准则的计算参数来仲裁候选频率来确定最佳频率(如果存在)。 如果找到最佳频率,则可以输出脉搏率和SPO 2 。 如果没有找到最佳频率,则可以使用用于计算脉率和SpO 2 2的其它常规技术。 在计算脉搏率和/或脉动血氧浓度之前,上述方法可以应用于红色和红外脉搏血氧饱和度信号。 公开的设备和系统被配置为执行根据本发明公开的方法。