Pulse wave analyzing device

• US 8,126,526 B2
• Filed: 10/31/2006
• Issued: 02/28/2012
• Est. Priority Date: 10/31/2005
• Status: Active Grant

• Current Assignee: Konica Minolta Sensing, Inc. (Konica Minolta Inc.)
• Original Assignee: Konica Minolta Sensing, Inc. (Konica Minolta Inc.)
• Inventors: Kitajima, Kazumi, Yamamoto, Koji, Terauchi, Koichi
• Primary Examiner(s): WINAKUR, ERIC FRANK
• Application Number:
  US11/590,632
• Publication Number:
  US 20070118028A1
• Time in Patent Office: 1,946 Days
• Field of Search: 600/323, 600/324, 600/326
• US Class Current: 600/324
• CPC Class Codes: A61B 2562/0219 Inertial sensors, e.g. accelerometers, gyroscopes, tilt switches
• CPC Class Codes: A61B 5/11 Measuring movement of the entire body or parts thereof, e.g. head or hand tremor, mobility of a limb for measuring pulse A61B5/02 ;A61B5/1038 takes precedence; motion detection to correct for motion artifacts in physiological signals A61B5/721
• CPC Class Codes: A61B 5/14551 for measuring blood gases
• CPC Class Codes: A61B 5/4812 Detecting sleep stages or cycles
• CPC Class Codes: A61B 5/4815 Sleep quality
• CPC Class Codes: A61B 5/4818 Sleep apnoea
• CPC Class Codes: A61B 5/681 Wristwatch-type devices
• CPC Class Codes: A61B 5/6824 Arm or wrist
• CPC Class Codes: A61B 5/6826 Finger
• CPC Class Codes: A61B 5/6838 Clamps or clips
• CPC Class Codes: A61B 5/721 using a separate sensor to detect motion or using motion information derived from signals other than the physiological signal to be measured
• CPC Class Codes: A61B 5/7445 Display arrangements, e.g. multiple display units

Abstract

A pulse wave analyzing device is provided with a performance part for performing analyzing of a pulse wave of a living body; and a mounting member for substantially integrally mounting constituent elements of the performance part. The performance part includes: a sensor section for measuring parameters relating to the pulse wave of the living body; an A/D converter for converting a measurement signal outputted from the sensor section into a digital signal; an analysis processing section for performing a predetermined data analysis with respect to measurement data outputted from the A/D converter; and a display section for displaying predetermined information relating to the measurement. The analysis processing section has a first analysis processor for performing a pulse wave analysis at least for a first case, and a second analysis processor for performing a pulse wave analysis for a second case different from the first case based on the measurement data relating to the pulse wave.

Claims

1. A pulse wave analyzing device comprising:

a performance part for performing analyzing of a pulse wave of a living body; and

a mounting member for substantially integrally mounting constituent elements of the performance part,

the performance part including;

a sensor section for measuring parameters relating to the pulse wave of the living body, said sensor section including at least a light emitter for emitting light of two wavelengths different from each other, and a light detector for receiving the light emitted from the light emitter and transmitted through the living body, said sensor section being configured to obtain a 2-wavelength pulse waveform by a one-time measurement as a measurement signal;

an A/D converter for converting the measurement signal outputted from the sensor section into a digital signal;

a memory section for storing therein measurement data including the digital signal outputted from the A/D converter;

an analysis processing section for performing a predetermined data analysis with respect to the measurement data read out of the memory section; and

a display section for displaying predetermined information relating to the measurement, wherein

the analysis processing section includes a first analysis processor configured to perform at least a first pulse wave analysis, and a second analysis processor configured to perform at least a second pulse wave analysis different from the first pulse wave analysis,

said analysis processing section being configured to perform the first and second pulse wave analyses in a manner so as to determine a degree of stress including discriminating a normal condition from a stressful condition, based on a degree of variation in pulse wave peak-to-peak intervals derived from a histogram of peak-to-peak intervals, the degree of variation for a stressful condition being lower than for a normal condition, said analysis processing section further being configured to determine one or more conditions selected from the group consisting of;

a sleep apnea index, based on a 2-wavelength pulse waveform;

an arrhythmia, based on pulse wave peak-to-peak intervals utilizing a 1-wavelength pulse waveform;

a depth of sleep, based on an amplitude of a pulse waveform and a variation in the pulse waveform; and

a blood vessel age, based on an acceleration pulse waveform obtained by a derivation of a pulse waveform.

2. The pulse wave analyzing device according to claim 1, wherein the performance part further includes:

a communication section for communicating data with another electrical device.

3. The pulse wave analyzing device according to claim 1, wherein

the performance part further includes a display controller for controlling the display section to display the information, and

the display controller controls the display section to selectively or simultaneously display at least an analysis result by the first analysis processor and an analysis result by the second analysis processor.

4. The pulse wave analyzing device according to claim 3, wherein the display controller is configured to control the display section to display the analysis result at least in a first display mode of displaying the analysis result in a first display manner, or in a second display mode of displaying the analysis result in a second display manner different from the first display manner.

5. The pulse wave analyzing device according to claim 1, wherein

the performance part has such dimensions as to be removably attached to a site near a wrist of a human body.

6. The pulse wave analyzing device according to claim 1, wherein said sensor section further includes an acceleration sensor.

7. The pulse wave analyzing device according to claim 1, wherein said analysis processing section is configured to perform one of the first or second pulse wave analyses in a manner so as to determine a sleep apnea index by analyzing a time-based change in SpO₂ and determining a count of dips where a SpO₂ value is lower than a predetermined value.

8. The pulse wave analyzing device according to claim 1, wherein said analysis processing section is configured to perform one of the first or second pulse wave analyses in a manner so as to determine an arrhythmia based on a degree in variation in pulse wave intervals.

9. The pulse wave analyzing device according to claim 1, wherein said analysis processing section is configured to determine a degree of stress by comparing a determined degree in variation in pulse wave peak-to-peak intervals to stored data which correlates variation in pulse wave peak-to-peak intervals and degrees of stress.

10. The pulse wave analyzing device according to claim 1, wherein said analysis processing section is configured to perform one of the first or second pulse wave analyses in a manner so as to determine a depth of sleep based on a time-based change in pulse wave bottom-to-peak amplitude values.

11. The pulse wave analyzing device according to claim 1, wherein said analysis processing section is configured to determine a blood vessel age by comparing said acceleration pulse waveform with a predetermined acceleration pulse waveform pattern.

12. The pulse wave analyzing device according to claim 1, wherein said analysis processing section is configured to perform each of the following analyses:

determining a sleep apnea index, assessing an arrhythmia, determining a degree of stress, determining a depth of sleep, and determining a blood vessel age.

13. A pulse wave analyzing device comprising:

a performance part for performing analyzing of a pulse wave of a living body; and

a mounting member for substantially integrally mounting constituent elements of the performance part,

the performance part including;

a sensor section for measuring parameters relating to the pulse wave of the living body, said sensor section being configured to obtain a 2-wavelength pulse waveform by a one-time measurement as a measurement signal;

an A/D converter for converting the measurement signal outputted from the sensor section into a digital signal;

a memory section for storing therein measurement data including the digital signal outputted from the A/D converter;

an analysis processing section for performing a predetermined plurality of kinds of data analysis with respect to the measurement data read out of the memory section, said analysis processing section being configured to perform said plurality of kinds of data analysis in a manner so as to determine a degree of stress including discriminating a normal condition from a stressful condition, based on a degree of variation in pulse wave peak-to-peak intervals derived from a histogram of peak-to-peak intervals, the degree of variation for a stressful condition being lower than for a normal condition, and one or more conditions selected from the group consisting of;

a sleep apnea index, an arrhythmia, a depth of sleep, and a blood vessel age; and

a display section for displaying predetermined information relating to the measurement.

14. The pulse wave analyzing device according to claim 13, wherein said analysis processing section is configured to analyze at least one of:

a sleep apnea index based on the 2-wavelength pulse waveform;

an arrhythmia based on pulse wave peak-to-peak intervals utilizing a 1-wavelength pulse waveform;

a depth of sleep based on an amplitude of a pulse waveform and a variation in the pulse waveform; and

a blood vessel age based on an acceleration pulse waveform obtained by a derivation of a pulse waveform.

15. The pulse wave analyzing device according to claim 13, wherein said analysis processing section is configured to analyze each of the following:

a sleep apnea index, an arrhythmia, a degree of stress, a depth of sleep, and a blood vessel age.

16. The pulse wave analyzing device according to claim 13, wherein said sensor section further includes an acceleration sensor.

17. The pulse wave analyzing device according to claim 13, wherein said analysis processing section is configured to determine a blood vessel age by comparing said acceleration pulse waveform with a predetermined acceleration pulse waveform pattern.

18. The pulse wave analyzing device according to claim 13, wherein said analysis processing section is configured to perform each of the following analyses:

determining a sleep apnea index, assessing an arrhythmia, determining a degree of stress, determining a depth of sleep, and determining a blood vessel age.

19. The pulse wave analyzing device according to claim 18, wherein said analysis processing section is configured to determine a degree of stress by comparing a determined degree in variation in pulse wave peak-to-peak intervals to stored data which correlates variation in pulse wave peak-to-peak intervals and degrees of stress.

20. A pulse wave analyzing device comprising:

a sensor system configured to measure parameters relating to the pulse wave of the living body, said sensor system including at least a light emitter for emitting light of two wavelengths different from each other, and a light detector for receiving the light emitted from the light emitter that has been transmitted through a portion of a living body, said sensor system being configured to obtain a 2-wavelength pulse waveform by a one-time measurement as a measurement signal;

an A/D converter for converting the measurement signal outputted from the sensor system into a digital signal;

a memory system for storing therein measurement data including the digital signal outputted from the A/D converter;

an analysis processor which is configured to perform a predetermined data analysis on the measurement data read out of the memory system, said analysis processor being configured to perform a degree of stress analysis including discriminating a normal condition from a stressful condition, based on a degree of variation in pulse wave peak-to-peak intervals derived from a histogram of peak-to-peak intervals, the degree of variation for a stressful condition being lower than for a normal condition, said analysis processor being configured to perform at least one additional analysis selected from the group consisting of;

determining a sleep apnea index, assessing an arrhythmia, determining a depth of sleep, and determining a blood vessel age; and

a display system for displaying information relating to the measurement.

21. The pulse wave analyzing device according to claim 20, wherein said analysis processor is configured to perform data analysis by performing at least one of:

an analysis of sleep apnea index based on the 2-wavelength pulse waveform by analyzing a time-based change in SpO₂ and determining a count of dips where a SpO₂ value is lower than a predetermined value,

an analysis of an arrhythmia based on pulse wave peak-to-peak intervals utilizing a 1-wavelength pulse waveform based on a degree in variation in pulse wave intervals,

an analysis of a degree of stress based on pulse wave peak-to-peak intervals based on a degree in variation in pulse wave intervals,

an analysis of a depth of sleep based on an amplitude of a pulse waveform and a variation in the pulse waveform based on a degree in variation in pulse wave intervals, and

an analysis of a blood vessel age based on an acceleration pulse waveform obtained by a derivation of a pulse waveform by comparing said acceleration pulse waveform with a predetermined acceleration pulse waveform pattern.

22. The pulse wave analyzing device according to claim 21, wherein said sensor system further includes an acceleration sensor.

23. The pulse wave analyzing device according to claim 20, wherein said analysis processor is configured to perform each of the following analyses:

determining a sleep apnea index, assessing an arrhythmia, determining a degree of stress, determining a depth of sleep, and determining a blood vessel age.

24. The pulse wave analyzing device according to claim 20, wherein said analysis processing section is configured to determine a blood vessel age by comparing said acceleration pulse waveform with a predetermined acceleration pulse waveform pattern.

25. A pulse wave analyzing device comprising:

a sensor system configured to measure parameters relating to the pulse wave of the living body, said sensor system including at least a light emitter for emitting light of two wavelengths different from each other, and a light detector for receiving the light emitted from the light emitter that has been transmitted through a portion of a living body, said sensor system being configured to obtain a 2-wavelength pulse waveform by a one-time measurement as a measurement signal;

an A/D converter for converting the measurement signal outputted from the sensor system into a digital signal;

a memory system for storing therein measurement data including the digital signal outputted from the A/D converter;

an analysis processor which is configured to perform a predetermined data analysis on the measurement data read out of the memory system, said analysis processor being configured to perform analyses to determine each of;

a sleep apnea index based on the 2-wavelength pulse waveform by analyzing a time-based change in SpO₂ and determining a count of dips where a SpO₂ value is lower than a predetermined value;

an arrhythmia based on pulse wave peak-to-peak intervals utilizing a 1-wavelength pulse waveform based on a degree in variation in pulse wave intervals;

a degree of stress, including discriminating a normal condition from a stressful condition, by comparing a degree in variation in pulse wave peak-to-peak intervals derived from a histogram of peak-to-peak intervals to stored data which correlates variation in pulse wave peak-to-peak intervals and degrees of stress, the degree of variation for a stressful condition being lower than for a normal condition;

a depth of sleep based on an amplitude of a pulse waveform and a variation in the pulse waveform based on a degree in variation in pulse wave intervals; and

a blood vessel age, said blood vessel age being determined by comparing an acceleration pulse waveform with a predetermined acceleration pulse waveform pattern; and

a display system for displaying information relating to the measurement.