Method for detecting physiological condition of sleeping patient based on analysis of pulse waves
First Claim
1. A method for detecting a physiological condition of a patient comprising the steps of:
- detecting pulse waves from the patient'"'"'s body;
creating an envelope of the pulse waves;
analyzing the envelope; and
determining whether the patient is in a specific physiological condition based on a result of the analysis.
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Accused Products
Abstract
A physiological condition detecting method detects pulse waves from the body of a patient, and creates the envelope of the pulse waves by connecting every peak of the pulse waves. It determines that the patient is in non-REM sleep, if the envelope fluctuates regularly. It determines that the patient is in REM sleep, if the envelope fluctuates irregularly. Further the method calculates and normalizes the amplitude and period of the envelope. It determines whether the patient has obstructive sleep apnea syndrome based on the normalized amplitude. It determines whether the patient has central sleep apnea syndrome based on the normalized period. It determines that the patient has mixed sleep apnea syndrome based on the normalized amplitude and the normalized period.
55 Citations
35 Claims
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1. A method for detecting a physiological condition of a patient comprising the steps of:
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detecting pulse waves from the patient'"'"'s body;
creating an envelope of the pulse waves;
analyzing the envelope; and
determining whether the patient is in a specific physiological condition based on a result of the analysis. - View Dependent Claims (2)
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3. A method for detecting a physiological condition of a patient comprising the steps of:
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detecting pulse waves from the patient'"'"'s body;
calculating a pulse height of each of the pulse waves;
analyzing the pulse height; and
determining whether the patient is in a specific physiological condition based on a result of the analysis. - View Dependent Claims (4, 5)
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6. A method for detecting a sleep condition of a patient comprising the steps of:
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detecting pulse waves from the sleeping patient'"'"'s body;
creating an envelope of the pulse waves by connecting one of tops and bottoms of the pulse waves;
determining that the patient is in non-REM sleep if the envelope fluctuates regularly; and
determining that the patient is in REM sleep if the envelope fluctuates irregularly. - View Dependent Claims (9, 12, 15)
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7. A method for detecting a sleep condition of a patient comprising the steps of:
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detecting pulse waves from the sleeping patient'"'"'s body;
calculating a pulse height of each of the pulse waves;
determining that the patient is in non-REM sleep if the pulse height fluctuates regularly; and
determining that the patient is in REM sleep if the pulse height fluctuates irregularly. - View Dependent Claims (10, 13, 16)
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8. A method for detecting a sleep condition of a patient comprising the steps of:
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detecting pulse waves from the sleeping patient'"'"'s body;
calculating a pulse height of each of the pulse waves;
creating a baseline of the pulse waves by connecting middle points of the pulse height;
determining that the patient is in non-REM sleep if the baseline fluctuates regularly; and
determining that the patient is in REM sleep if the baseline fluctuates irregularly. - View Dependent Claims (11, 14, 17, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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18. A method for diagnosing a patient as sleep apnea syndrome comprising the steps of:
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detecting pulse waves from the sleeping patient'"'"'s body;
analyzing the pulse waves; and
determining whether the patient has sleep apnea syndrome based on a result of the analysis.
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32. An apparatus for detecting a physiological condition of a patient comprising:
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a pulse sensor for detecting pulse waves from the patient body;
a drive circuit for driving the pulse sensor;
a data processing unit for executing a program for creating and analyzing an envelope of the pulse waves and detecting a physiological condition based on a result of the analysis; and
a display unit for displaying a result of the detection. - View Dependent Claims (33, 34, 35)
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Specification