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公开(公告)号：US20170100550A1
公开(公告)日：2017-04-13
申请号：US15128605
申请日：2015-03-12
摘要： An inhaler with a housing (H) comprising an air-inlet (A_I) and a an air-outlet (A_O). Inside the housing (H) a flow path (FP) is defined between air-inlet (A_I) and air-outlet (A_O) where a dispenser (DP) is arranged to dispense an aerosol or a dry powder in the flow path (FP). Two sensors (S1, S2), e.g. microphones, are positioned spaced apart at external surfaces of the housing (H) to sense sound or vibrations resulting from a flow in the flow path (FP) at two different positions. This allows a precise detection of flow velocity during inhalation based on the sound or vibrations sensed by the two sensors (S1, S2), thus allowing examination of correct use of the inhaler. Further, the use of two spaced apart sensors (S1, S2) facilitates identification of priming and firing events in the sensed sound or vibrations which may also be used in evaluating the use of the inhaler. Preferably, a noise reduction algorithm is used that exploits the differences in the captured sound or vibrations from the two sensors (S1, S2), so at to allow precise flow measurements even in noisy environments.
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2.发明公开公开(公告)号：US20240285187A1
公开(公告)日：2024-08-29
申请号：US18573480
申请日：2022-06-27
CPC分类号： A61B5/085 , A61B5/1126 , A61B5/113 , A61B5/389 , A61B5/7221 , A61B5/7225 , A61B2562/0219 , A61B2562/04 , A61B2562/06
摘要： Non-invasive systems and methods for quantifying respiratory muscle effort (RME) (or breathing effort, work-of-breathing) are provided. The systems and methods utilize simultaneously measured EMG and accelerometer signals. The measured EMG signal is preprocessed to produce both a signal accentuating regular breathing activity and a signal accentuating sniff activity (deep, sharp inhalations). Time intervals of candidate sniffs are determined from the preprocessed EMG signals. The measured accelerometer signal is preprocessed to produce multiple signals accentuating either upper or lower frequency band activity. Features of the preprocessed EMG and accelerometer signals corresponding to the time intervals of candidate sniffs are analyzed to determine if the candidate sniffs constitute actual sniffs or artifacts. Subsequently, after maximum sniff effort has been identified, RME is quantified by the ratio of the mean of the maxima of regular breathing activity to the value of the maximum sniff effort.
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公开(公告)号：US20230218196A1
公开(公告)日：2023-07-13
申请号：US17916121
申请日：2021-03-24
CPC分类号： A61B5/085 , A61B5/0809 , A61B5/7203 , A61B5/4884 , A61B5/7246
摘要： The invention provides a system and method for determining a respiratory effort for a subject. The method comprises obtaining a relaxed signal representing a subject breathing in a relaxed manner and a forced signal representing a subject breathing in a forced manner. The relaxed signal is then smoothed over a first averaging window and the forced signal is smoothed over a second averaging window, wherein the first averaging window is longer than the second averaging window. Based on the smoothed relaxed signal and the smoothed forced signal, a respiratory effort can thus be determined.
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公开(公告)号：US20230134839A1
公开(公告)日：2023-05-04
申请号：US17916223
申请日：2021-03-25
摘要： The invention provides a system and method for determining a respiratory effort for a subject. The method comprises obtaining a relaxed signal representing the subject breathing in a relaxed manner and a forced signal representing the subject breathing in a forced manner. A plurality of forced peaks is derived from the forced signal and candidate peaks are selected from the plurality of forced peaks. The candidate peaks are selected based on features of the forced peaks. A user selects a user identified peak from the candidate peaks and thus, a respiratory effort is determined based on the relaxed signal and the user identified peak.
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公开(公告)号：US20220142858A1
公开(公告)日：2022-05-12
申请号：US17270875
申请日：2020-07-07
IPC分类号： A61H31/00 , A61B5/024 , A61B5/1455 , A61B5/00
摘要： A device, system, and method to control activation of oxygen saturation (SpO2) measurements in a cardio-pulmonary resuscitation (CPR) procedure. When compressions are present, only a PPG-based pulse detection algorithm is performed. When a spontaneous pulse has been detected and compressions are not detected during a predetermined time period, both a PPG-based pulse detection algorithm and an SpO2 measurement algorithm are performed. Depending on whether a chest compression is delivered manually or automatically, parameter selections for the compression detection algorithm, the PPG-based pulse detection algorithm, and the SpO2 measurement algorithm are adjusted accordingly.
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