Invention Grant
US08381722B2 Distinguishing between closed and open airway apneas and treating patients accordingly
失效
区分闭合和开放性气道呼吸暂停并相应地治疗患者
- Patent Title: Distinguishing between closed and open airway apneas and treating patients accordingly
- Patent Title (中): 区分闭合和开放性气道呼吸暂停并相应地治疗患者
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Application No.: US12893449Application Date: 2010-09-29
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Publication No.: US08381722B2Publication Date: 2013-02-26
- Inventor: Michael Berthon-Jones
- Applicant: Michael Berthon-Jones
- Applicant Address: AU
- Assignee: ResMed Limited
- Current Assignee: ResMed Limited
- Current Assignee Address: AU
- Agency: Lerner, David, Littenberg, Krumholz & Mentlik, LLP
- Priority: AUPM2246 19931105
- Main IPC: F16K31/02
- IPC: F16K31/02

Abstract:
Methods and apparatus for determining the occurrence of an apnea, patency and/or partial obstruction of the airway are disclosed. Respiratory air flow from a patient is measured to give an air flow signal. The determination of an apnea is performed by calculating the variance of the air flow signal over a moving time window and comparing the variance with a threshold value. One determination of partial obstruction of the airway is performed by detecting the inspiratory part of the air flow signal, scaling it to unity duration and area and calculating an index value of the amplitude of the scaled signal over a mid-portion. Alternatively, the index value is a measure of the flatness of the air flow signal over the mid-portion. One determination of patency of the airway is performed by applying an oscillatory pressure waveform of known frequency to a patient's airway, calculating the magnitude of the component of said air flow signal at the known frequency induced by the oscillatory pressure waveform and comparing the calculated magnitude with a threshold value. Alternatively, the air flow signal is analysed to detect the presence of a component due to cardiogenic activity.
Public/Granted literature
- US20110011402A1 DISTINGUISHING BETWEEN CLOSED AND OPEN AIRWAY APNEAS AND TREATING PATIENTS ACCORDINGLY Public/Granted day:2011-01-20
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