APPARATUS AND METHOD FOR DIAGNOSING OBSTRUCTIVE SLEEP APNEA
First Claim
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1. An apparatus (2) for determining one or more parameters for use in diagnosing the presence of obstructive sleep apnea in a patient while the patient is awake, the apparatus (2) comprising:
- a processor (12) configured to receive signals representing measurements of a patient'"'"'s breathing obtained during a plurality of breathing cycles by the patient, convert the signals into the frequency domain and to determine a value for at least one parameter based on an analysis of the frequency-domain converted signals in one or more frequency bands covering frequencies below 100 Hz,wherein the processor (12) is configured to determine a value for a first parameter by comparing the signals in a first frequency band during exhalation to the signals in a second frequency band during exhalation, and/or determine a value for a second parameter by comparing the signals in a third frequency band during inhalation to the signals in the third frequency band during exhalation, and/or determine a value for a third parameter by comparing the signals in a fourth frequency band during an inhalation or exhalation to a noise level above a frequency threshold during the inhalation or exhalation.
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Abstract
There is provided an apparatus for use in diagnosing the presence of obstructive sleep apnea in a patient, the apparatus comprising a processor configured to receive signals representing measurements of a patient'"'"'s breathing obtained during a plurality o breathing cycles by the patient while the patient is awake, convert the signals into the frequency domain and to determine a value for at least one parameter based on an analysis of the frequency-domain converted signals in one or more frequency bands covering frequencies below 100 Hz.
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Citations
15 Claims
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1. An apparatus (2) for determining one or more parameters for use in diagnosing the presence of obstructive sleep apnea in a patient while the patient is awake, the apparatus (2) comprising:
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a processor (12) configured to receive signals representing measurements of a patient'"'"'s breathing obtained during a plurality of breathing cycles by the patient, convert the signals into the frequency domain and to determine a value for at least one parameter based on an analysis of the frequency-domain converted signals in one or more frequency bands covering frequencies below 100 Hz, wherein the processor (12) is configured to determine a value for a first parameter by comparing the signals in a first frequency band during exhalation to the signals in a second frequency band during exhalation, and/or determine a value for a second parameter by comparing the signals in a third frequency band during inhalation to the signals in the third frequency band during exhalation, and/or determine a value for a third parameter by comparing the signals in a fourth frequency band during an inhalation or exhalation to a noise level above a frequency threshold during the inhalation or exhalation. - View Dependent Claims (2, 3, 5, 7, 8, 9, 10, 11)
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4. (canceled)
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6. (canceled)
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12. A method for determining one or more parameters for use in diagnosing obstructive sleep apnea, comprising:
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obtaining signals representing measurements of a patient'"'"'s breathing during a plurality of breathing cycles by the patient while the patient is awake (32); converting the signals into the frequency domain (36); and determining a value for first parameter by comparing the signals in a first frequency band during exhalation to the signals in a second frequency band during exhalation; and
/ordetermining a value for a second parameter by comparing the signals in a third frequency band during inhalation to the signals in the third frequency band during exhalation; and
/ordetermining a value for a third parameter by comparing the signals in a fourth frequency band during an inhalation or exhalation to a noise level above a frequency threshold during the inhalation or exhalation; wherein each of the first, second and third frequency bands covers frequencies below 100 Hz (38). - View Dependent Claims (14, 15)
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13. (canceled)
Specification