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    METHODS AND DEVICES FOR THE DETECTION OF HYPOPNOEA
    11.
    发明申请
    METHODS AND DEVICES FOR THE DETECTION OF HYPOPNOEA 审中-公开

    公开(公告)号：US20160256644A1

    公开(公告)日：2016-09-08

    申请号：US15156471

    申请日：2016-05-17

    Applicant: ResMed Limited

    Inventor： Jeffrey Peter Armitstead

    IPC: A61M16/00 ,  A61B5/087 ,  A61B5/00

    Abstract: Automated methods provide hypopnea detection for determining a hypopnea event and/or a severity of a hypopnea event. In some embodiments, a calculated short-term variance of a measured respiratory flow signal are compared to first and second proportions of a calculated long-term variance of the measured flow signal. A detection of the hypopnea may be indicated if the first measure falls below and does not exceed a range of the first and second proportions during a first time period. In some embodiments, a hypopnea severity measure is determined by automated measuring of an area bounded by first and second crossings of a short-term measure of ventilation and a proportion of a long-term measure. The detection methodologies may be implemented for data analysis by a specific purpose computer, a detection device that measures a respiratory airflow or a respiratory treatment apparatus that provides a respiratory treatment regime based on the detected hypopneas.

    Discrimination of cheyne-stokes breathing patterns by use of oximetry signals
    14.
    发明授权
    Discrimination of cheyne-stokes breathing patterns by use of oximetry signals 有权

    公开(公告)号：US10512429B2

    公开(公告)日：2019-12-24

    申请号：US14757601

    申请日：2015-12-23

    Applicant: ResMed Limited

    Inventor： Chun Yui Lau ,  Jeffrey Peter Armitstead

    IPC: A61B5/1455 ,  A61B5/08 ,  A61B5/00 ,  A61B5/087 ,  G06K9/00 ,  G06K9/62 ,  A61M16/00

    Abstract: Methods and apparatus provide Cheyne-Stokes respiration (“CSR”) detection based on a blood gas measurements such as oximetry. In some embodiments, a duration, such as a mean duration of contiguous periods of changing saturation or re-saturation occurring in an epoch taken from a processed oximetry signal, is determined. An occurrence of CSR may be detected from a comparison of the duration and a threshold derived to differentiate saturation changes due to CSR respiration and saturation changes due to obstructive sleep apnea. The threshold may be a discriminant function derived as a classifier by an automated training method. The discriminant function may be further implemented to characterize the epoch for CSR based on a frequency analysis of the oximetry data. Distance from the discriminant function may be utilized to generate probability values for the CSR detection.

    Discrimination of cheyne-stokes breathing patterns by use of oximetry signals
    16.
    发明申请
    Discrimination of cheyne-stokes breathing patterns by use of oximetry signals 审中-公开
    通过使用血氧定量信号来区分针灸呼吸模式

    公开(公告)号：US20160120464A1

    公开(公告)日：2016-05-05

    申请号：US14757601

    申请日：2015-12-23

    Applicant: ResMed Limited

    Inventor： Chun Yui Lau ,  Jeffrey Peter Armitstead

    IPC: A61B5/00 ,  A61B5/1455

    CPC classification number: A61B5/4818 ,  A61B5/0826 ,  A61B5/087 ,  A61B5/14551 ,  A61B5/6819 ,  A61B5/6823 ,  A61B5/7207 ,  A61B5/7221 ,  A61B5/7232 ,  A61B5/726 ,  A61B5/7267 ,  A61B5/7278 ,  A61M16/026 ,  A61M2230/40 ,  G06K9/0053 ,  G06K9/6262 ,  G06K9/6269

    Abstract: Methods and apparatus provide Cheyne-Stokes respiration (“CSR”) detection based on a blood gas measurements such as oximetry. In some embodiments, a duration, such as a mean duration of contiguous periods of changing saturation or re-saturation occurring in an epoch taken from a processed oximetry signal, is determined. An occurrence of CSR may be detected from a comparison of the duration and a threshold derived to differentiate saturation changes due to CSR respiration and saturation changes due to obstructive sleep apnea. The threshold may be a discriminant function derived as a classifier by an automated training method. The discriminant function may be further implemented to characterize the epoch for CSR based on a frequency analysis of the oximetry data. Distance from the discriminant function may be utilized to generate probability values for the CSR detection.

    Abstract translation: 方法和装置基于血气测量（例如血氧定量法）提供Cheyne-Stokes呼吸（“CSR”）检测。 在一些实施例中，确定持续时间，例如从经处理的血氧定量信号取得的在时期中出现的改变饱和度或再饱和的连续周期的平均持续时间。 可以从持续时间和导出的阈值的比较来检测CSR的发生，以区分由于呼吸呼吸引起的饱和度变化和由于阻塞性睡眠呼吸暂停引起的饱和度变化。 阈值可以是通过自动训练方法作为分类器导出的判别函数。 基于氧饱和度数据的频率分析，可以进一步实现判别函数以表征CSR历元。 可以利用与判别函数的距离来生成CSR检测的概率值。

    Method and system for motor failure detection
    18.
    发明授权
    Method and system for motor failure detection 有权

    公开(公告)号：US10175300B2

    公开(公告)日：2019-01-08

    申请号：US14804771

    申请日：2015-07-21

    Applicant: ResMed Limited

    Inventor： Jeffrey Peter Armitstead ,  Dion Charles Chewe Martin ,  William Mcinnes Somerville

    IPC: G01R31/34 ,  H02K11/21 ,  A61M16/00 ,  F04B51/00 ,  H02P29/02 ,  H02K11/20

    Abstract: Systems and methods for detecting developing faults in a flow generator or ventilator during therapeutic use thereof are provided. The motor current may be measured to estimate the torque input by the motor, while the output torque from the impeller may be determined (e.g., as inferred from the motor control system model and/or by consulting a lookup table). One or more transducers may collect data useful in determining the input and output torques. A difference between the input (to the motor) torque and the output (from the impeller) torque may be calculated. The difference, optionally filtered using a low-pass filter to reduce noise, may be compared to a predetermined threshold once or over a period of time to detect gross failures and/or developing failures. Once a failure or developing failure is detected, a user may be alerted and/or the flow generator may be placed into a “service required” mode.

    AUTOMATED CONTROL FOR DETECTION OF FLOW LIMITATION
    20.
    发明申请
    AUTOMATED CONTROL FOR DETECTION OF FLOW LIMITATION 审中-公开
    用于检测流量限制的自动控制

    公开(公告)号：US20160250428A1

    公开(公告)日：2016-09-01

    申请号：US15151641

    申请日：2016-05-11

    Applicant: ResMed Limited

    Inventor： Jeffrey Peter Armitstead ,  Peter Edward Bateman ,  David John Bassin

    IPC: A61M16/00

    Abstract: A respiratory flow limitation detection device, which can include an airway pressure treatment generator, determines a flow limitation measure 506 based one or more shape indices for detecting partial obstruction and a measure of a patient's ventilation or respiratory duty cycle. The shape indices may be based on function(s) that ascertain the likelihood of the presence of M-shaped breathing patterns and/or chair-shaped breathing patterns. The measure of ventilation may be based on analysis of current and prior tidal volumes to detect a less than normal patient ventilation. The duty cycle measure may be a ratio of current and prior measures of inspiratory time to respiratory cycle time to detect an increase in the patient's inspiratory cycle time relative to the respiratory cycle time. A pressure setting based on the flow limitation may then be used to adjust the treatment pressure to ameliorate the patient's detected flow limitation condition.

    Abstract translation: 可以包括气道压力治疗发生器的呼吸流限制检测装置基于用于检测部分阻塞的一个或多个形状指标和患者的通气或呼吸占空比的测量来确定流量限制测量506。 形状指数可以基于确定存在M形呼吸模式和/或椅形呼吸模式的可能性的功能。 通气量可以基于当前和以前潮气量的分析，以检测不到一般的患者通气。 占空比测量可以是当前和先前测量吸气时间与呼吸周期时间之间的比例，以检测患者吸气循环时间相对于呼吸周期时间的增加。 然后可以使用基于流量限制的压力设置来调节治疗压力以改善患者检测到的流量限制条件。

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