Apparatus for detecting vital functions, control unit and pulse wave sensor
First Claim
1. An apparatus for detecting vital functions, comprising:
- sensing means adapted for attachment to a body and produces pulse wave signals corresponding to pulse waves of the body; and
respiration waveform calculation means for finding a respiration waveform that represents a respiration condition from the pulse waves detected by the sensing means; and
cough determining means which determines an occurrence of a cough when formation of a double triangular wave is detected, the double triangular wave having an acute angle in which two peaks of the respiration waveform consecutively exceed a predetermined level.
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Accused Products
Abstract
An apparatus for detecting vital functions has a pulse wave sensor attachable to a body and a control unit. The control unit checks if amplitude of pulse wave signals produced from the pulse wave sensor varies. The control unit further checks if a large change in the amplitude during a systolic phase of a pulse wave corresponding to the systolic phase of the heart. If a first large change in the amplitude during a diastolic phase of a pulse wave corresponding to the diastolic phase of the heart, it is highly probable that a motion artifact has occurred. Therefore, a motion artifact flag is set. Next, it is checked if the amplitude in the next diastole is changing by more than 30%. if it is presumed that the occurrence of cough is highly probable, a cough flag is set. if it is neither the motion artifact nor the cough, then a yawn flag is set.
27 Citations
26 Claims
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1. An apparatus for detecting vital functions, comprising:
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sensing means adapted for attachment to a body and produces pulse wave signals corresponding to pulse waves of the body; and respiration waveform calculation means for finding a respiration waveform that represents a respiration condition from the pulse waves detected by the sensing means; and cough determining means which determines an occurrence of a cough when formation of a double triangular wave is detected, the double triangular wave having an acute angle in which two peaks of the respiration waveform consecutively exceed a predetermined level. - View Dependent Claims (2, 3)
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4. An apparatus for detecting vital functions, comprising:
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sensing means adapted for attachment to a body and produces pulse wave signals corresponding to pulse waves of the body; and cough determining means which determines an occurrence of a cough when an amplitude of the pulse waves on a p-systole side corresponding to a systolic phase of a heart of the body has exceeded a predetermined level and when the amplitude of the pulse wave signals on a p-diastole side corresponding to a succeeding diastolic phase of the heart of the body has exceeded a predetermined level. - View Dependent Claims (5, 6)
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7. An apparatus for detecting vital functions, comprising:
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sensing means adapted for attachment to a body and produces pulse wave signals corresponding to pulse waves of the body; and cough determining means which determines an occurrence of a cough when an amplitude of the pulse waves on a p-systole side corresponding to a systolic phase of a heart of the body has increased by more than a predetermined level without causing a waveform of the pulse waves to be varied from a waveform of ordinary pulse waves which are produced in a calm state of the body. - View Dependent Claims (8, 9)
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10. An apparatus for detecting vital functions, comprising:
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sensing means adapted for attachment to a body and produces pulse wave signals corresponding to pulse waves of the body; and cough determining means which determines an occurrence of a cough when a change in a ratio AW2/BW2 of an amplitude AW2 of a base level of the pulse waves divided by an amplitude BW2 of the pulse waves is within a predetermined value and within a predetermined period of time corresponding to a coughing. - View Dependent Claims (11, 12)
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13. An apparatus for detecting vital functions, comprising:
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sensing means adapted for attachment to a body and produces pulse wave signals corresponding to pulse waves of the body; and yawn determining means which determines an occurrence of a yawn when a base level of the pulse waves is lowered over a predetermined period corresponding to yawning. - View Dependent Claims (14, 15, 16, 17, 18)
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19. An apparatus for detecting vital functions, comprising:
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sensing means adapted for attachment to a body and produces pulse wave signals corresponding to pulse waves of the body; and yawn determining means which determines an occurrence of a yawn when an amplitude of the pulse waves on a p-systole side corresponding to a systolic phase of a heart of the body exceeds a predetermined level but when an amplitude of a succeeding pulse wave signals on a p-diastole side corresponding to a diastolic phase of the heart of the body does not become smaller than a predetermined level. - View Dependent Claims (20)
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21. An apparatus for detecting vital functions, comprising:
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sensing means adapted for attachment to a body and produces pulse wave signals corresponding to pulse waves of the body; and yawn determining means which determines an occurrence of a yawn when a whole amplitude of pulse waves of a sum of amplitudes on a p-systole side and of amplitudes on a p-diastole side becomes smaller than a predetermined level after the amplitudes on p-systole side corresponding to the systolic phase of a heart of the body has exceeded a predetermined level without causing the waveform of the pulse waves to be varied from the waveform of ordinary pulse waves. - View Dependent Claims (22)
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23. An apparatus for detecting vital functions, comprising:
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sensing means adapted for attachment to a body and produces pulse wave signals corresponding to pulse waves of the body; respiration waveform calculation means which finds a respiration waveform that represents a respiration condition from the pulse waves; and yawn determining means which determines an occurrence of a yawn when the amplitude of the respiration waveform is not smaller than a predetermined level and when a double triangular wave of an obtuse angle is detected in which two peaks of the respiration waveform consecutively exceed a predetermined level. - View Dependent Claims (24)
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25. An apparatus for detecting vital functions, comprising:
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sensing means adapted for attachment to a body and produces pulse wave signals corresponding to pulse waves of the body; yawn determining means which determines an occurrence of a yawn when a change in a ratio AW2/BW2 of an amplitude AW2 of a base level of the pulse waves divided by an amplitude BW2 of the pulse waves is not smaller than a predetermined level and within a predetermined period of time corresponding to a yawning. - View Dependent Claims (26)
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Specification