Apparatus and method for identifying sleep disordered breathing
First Claim
1. A method for identifying sleep disordered breathing of a patient, the method comprising:
- collecting data of at least one cardio-respiratory function of the patient over time;
generating a plurality of intrinsic mode functions from the data;
generating an array of frequencies, times, and amplitudes based on at least one intrinsic mode function;
generating an array of times and amplitudes based on a selected frequency; and
identifying sleep disordered breathing of the patient from the generated amplitudes.
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Abstract
An apparatus and method for identifying sleep disordered breathing while the patient is awake. The device includes collection of raw data which is normalized, then conditioned and transformed for comparison against a threshold, enabling identification of the presence of and severity of sleep disordered breathing. Step 1 is the collection of raw data and normalization. Step 2 is the conditioning of the data (using Empirical Mode Decomposition or similar technique). Step 3 is the selection of several components in the conditioned data. Step 4 is the performing of a Hilbert transform on the conditioned data. Step 5 is selecting a constant frequency. Step 6 is charting output against a threshold. Step 7 is identifying the patient'"'"'s condition based on an array of amplitudes and the threshold.
26 Citations
20 Claims
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1. A method for identifying sleep disordered breathing of a patient, the method comprising:
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collecting data of at least one cardio-respiratory function of the patient over time;
generating a plurality of intrinsic mode functions from the data;
generating an array of frequencies, times, and amplitudes based on at least one intrinsic mode function;
generating an array of times and amplitudes based on a selected frequency; and
identifying sleep disordered breathing of the patient from the generated amplitudes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method for identifying sleep disordered breathing of a patient, the method comprising:
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collecting air flow data of the patient over time while the patient is awake;
normalizing the air flow data;
generating a plurality of intrinsic mode functions from the data using Empirical Mode Decomposition;
selecting at least two intrinsic mode functions;
performing a Hilbert transform on the two intrinsic mode functions to generate an array of frequencies, times, and amplitudes;
generating an array of times and amplitudes based on a selected frequency;
grouping the amplitudes from the array of times and amplitudes into a plurality of bins, each bin including amplitudes being within a predetermined range of magnitudes;
determining a cumulative number of amplitudes within a selected number of bins, the selected bins including amplitudes having the lowest magnitudes; and
diagnosing the patient with sleep disordered breathing if the cumulative number of amplitudes is less than a threshold. - View Dependent Claims (16, 17, 18)
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19. An apparatus for identifying sleep disordered breathing of a patient comprising:
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collecting means for collecting data of at least one cardio-respiratory function of the patient over time;
first means for generating a plurality of intrinsic mode functions from the data;
second means for generating an array of frequencies, times, and amplitudes based on at least one intrinsic mode function;
third means for generating an array of times and amplitudes based on a selected frequency; and
identifying means for identifying sleep disordered breathing of the patient from the generated amplitudes. - View Dependent Claims (20)
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Specification