Biological information processing system and method of controlling biological information processing system

• US 10,172,530 B2
• Filed: 07/02/2015
• Issued: 01/08/2019
• Est. Priority Date: 07/09/2014
• Status: Active Grant

• Current Assignee: Seiko Epson Corporation (Seiko Group)
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: Takahashi, Eizo
• Primary Examiner(s): LEVICKY, WILLIAM J
• Application Number:
  US14/791,002
• Publication Number:
  US 20160007868A1
• Time in Patent Office: 1,286 Days
• CPC Class Codes: A61B 5/02438 with portable devices, e.g. worn by the patient
• CPC Class Codes: A61B 5/4058 for evaluating the central nervous system A61B5/4806, A61B5/4821 take precedence
• CPC Class Codes: A61B 5/4064 Evaluating the brain A61B5/031, A61B5/369, A61B5/14553 take precedence
• CPC Class Codes: A61B 5/4812 Detecting sleep stages or cycles
• CPC Class Codes: A61B 5/4815 Sleep quality
• CPC Class Codes: A61B 5/681 Wristwatch-type devices
• CPC Class Codes: A61B 5/7275 Determining trends in physiological measurement data; Predicting development of a medical condition based on physiological measurements, e.g. determining a risk factor

Abstract

A biological information processing system includes a pulse wave information acquisition unit which acquires pulse wave information of a user, and a processing unit which determines the sleep state of the user based on the pulse wave information. The processing unit obtains index information relating to an arousal state during sleep based on the pulse wave information.

Claims

1. A biological information processing system comprising:

a pulse wave sensor;

a pulse wave information acquisition unit which acquires pulse wave information of a user from the pulse wave sensor; and

a processing unit which determines the sleep state of the user based on the pulse wave information, and

a presentation unit which presents the index information to the user;

wherein the processing unit obtains index information relating to a brain wave state during sleep based on the pulse wave information, and

wherein the processing unit;

performs a smoothing process of the pulse wave information in a first period during which it is determined that the user is in the sleep state;

obtains an amount of change of a peak of the pulse wave information before the smoothing process with respect to the value of the peak of the pulse wave information after the smoothing process;

when the obtained amount of change of the peak exceeds a pulse wave change amount threshold value, obtains a time representing the width of the peak of the pulse wave information; and

when the obtained time is within a given second period, determines that the arousal state is generated and obtains the index information based on the determination result.

2. The biological information processing system according to claim 1,

wherein the brain wave state is an arousal state.

3. The biological information processing system according to claim 1,

wherein the processing unit obtains the index information based on a change in the pulse wave information in a first period during which it is determined that the user is in the sleep state.

4. The biological information processing system according to claim 3,

wherein the processing unit obtains the index information based on a comparison process of the amount of change in the pulse wave information in a given second period and a pulse wave change amount threshold value.

5. The biological information processing system according to claim 4,

wherein the processing unit obtains, as index information, the number of times at which the amount of change in the pulse wave information in the second period exceeds the pulse wave change amount threshold value for a given unit time.

6. The biological information processing system according to claim 4,

wherein the processing unit sets at least one value of the length of the second period and the pulse wave change amount threshold value based on personal information of the user.

7. The biological information processing system according to claim 4,

wherein the pulse wave information is information representing a pulse rate or a pulse period, and

the processing unit sets the length of the second period based on a time corresponding to a change cycle of the pulse wave information.

8. The biological information processing system according to claim 2,

wherein the processing unit obtains somnolence index information as the index information relating to the arousal state.

9. The biological information processing system according to claim 2,

wherein the processing unit detects a state representing awakening without user consciousness as the arousal state based on the pulse wave information.

10. The biological information processing system according to claim 1,

wherein the pulse wave information is a pulse rate or a pulse period.

11. The biological information processing system according to claim 1,

wherein the presentation unit presents that the user is in the arousal state.