Method and apparatus for diagnosing sleep breathing disorders
First Claim
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1. A method for generating markers identifying the timing of the onset of an event characteristic of a sleep breathing disorder including the steps of:
- monitoring at least one cardio-respiratory function over time;
generating a time series vector representation of each monitored cardio-respiratory function;
generating a signal for each monitored function based upon chaotic processing of the corresponding time series vector representation; and
identifying as a marker each excursion of each signal beyond a corresponding threshold value thereby to indicate the timing of the onset of an event.
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Abstract
An apparatus and method for identifying the timing of the onset of and duion of an event characteristic of sleep breathing disorder. Chaotic processing techniques analyze data concerning one or more cardio-respiratory functions such as nasal air flow, chest wall effort, oxygen saturation, heart rate and heart activity. Excursions of the resulting signal beyond a threshold provide markers for the timing of such an event that is useful in the diagnosis of obstructed sleep apnea and other respiratory dysfunctions.
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Citations
24 Claims
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1. A method for generating markers identifying the timing of the onset of an event characteristic of a sleep breathing disorder including the steps of:
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monitoring at least one cardio-respiratory function over time; generating a time series vector representation of each monitored cardio-respiratory function; generating a signal for each monitored function based upon chaotic processing of the corresponding time series vector representation; and identifying as a marker each excursion of each signal beyond a corresponding threshold value thereby to indicate the timing of the onset of an event. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. Apparatus for generating markers identifying the timing of the onset of an event characteristic of a sleep breathing disorder including:
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monitoring means for monitoring at least one cardio-respiratory function over time; first means for generating a time series vector representation of each monitored cardio-respiratory function; second means for generating a signal for each monitored function based upon chaotic processing of the corresponding time series vector representation; and marker identifying means for identifying as a marker each excursion of each signal from said second generating means beyond a corresponding threshold value thereby to indicate the timing of the onset of an event. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification