RECORDING MEDIUM, DEVICE, AND METHOD FOR SLEEP APNEA DETECTION

• US 20090234241A1
• Filed: 03/17/2009
• Published: 09/17/2009
• Est. Priority Date: 03/17/2008
• Status: Abandoned Application

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Otani, Takeshi, Endo, Kaori, Togawa, Taro, OTA, Yasuji
• Application Number:
  US12/405,624
• Publication Number:
  US 20090234241A1
• Time in Patent Office: Days
• US Class Current: 600/529
• CPC Class Codes: A61B 5/0002 Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network A61B5/07 takes precedence; transmission systems for measured values G08C; transmission H04B; transmission of digital information H04L; wireless communication networks H04W
• CPC Class Codes: A61B 5/0816 Measuring devices for examining respiratory frequency measuring frequency of electric signals G01R23/00
• CPC Class Codes: A61B 5/4818 Sleep apnoea
• 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
• CPC Class Codes: A61B 7/003 Detecting lung or respiration noise

Abstract

A device for sleep apnea detection, includes an external sound recorder that records external sound in environment, a sound/silence determining unit that determines whether an audible sound or no sound is found in the external sound recorded in the external sound recorder, a breathing pace analyzing unit that analyzes, using information of intervals of the audible sound and no sound found by the sound/silence determining unit and the external sound, a breathing pace indicating a cycle of a breathing estimated interval during which breathing is estimated, and an apnea interval extracting unit that extracts a silent interval within the breathing estimated interval based on the breathing pace analyzed by the breathing pace analyzing unit.

Claims

1. A computer readable recording medium that stores therein a computer program for sleep apnea detection, the computer program causing a computer to execute:

(a) recording external sound in environment;

(b) determining whether an audible sound or no sound is found in the external sound recorded at (a);

(c) analyzing, using information of intervals of the audible sound and no sound found at (b) and the external sound, a breathing pace indicating a cycle of a breathing estimated interval during which breathing is estimated; and

(d) extracting a silent interval within the breathing estimated interval based on the breathing pace analyzed at (c).

2. The computer readable recording medium according to claim 1, further causing the computer to execute

(e) determining, when the audible sound is found at (b), whether snoring or sleep breathing is included in an audible-sound interval during which the audible sound is found, wherein

when the snoring or the sleep breathing is determined to be included at (e), (c) includes analyzing the breathing pace by using one of a snoring interval and a sleep breathing interval during which the snoring and the sleep breathing are found respectively.

3. The computer readable recording medium according to claim 2, wherein (c) includes calculating a cycle length of one of the snoring interval and the sleep breathing interval, so as to analyze the breathing pace using the cycle length.

4. The computer readable recording medium according to claim 3, wherein, when the silent interval within the breathing estimated interval is extracted, (d) includes determining, using cycle information of the snoring interval calculated at (c), whether the silent interval is disruption of snoring due to apnea, or disappearance of snoring.

5. The computer readable recording medium according to claim 1, further causing the computer to execute (f) notifying apnea condition to a user, when the silent interval within the breathing estimated interval is extracted at (d).

6. The computer readable recording medium according to claim 1, further causing the computer to execute

(g) performing statistical processing on an extraction result of the silent interval extracted at (d), so as to calculate a risk of apnea syndrome;

and

(h) displaying the risk of apnea syndrome calculated at (g) on a display unit.

7. The computer readable recording medium according to claim 1, further causing the computer to execute

(g) performing statistical processing on an extraction result of the silent interval extracted at (d), so as to calculate a risk of apnea syndrome;

and

(i) outputting the risk of apnea syndrome calculated at (g) to an external terminal for medical use.

8. A device for sleep apnea detection, comprising:

an external sound recorder that records external sound in environment;

a sound/silence determining unit that determines whether an audible sound or no sound is found in the external sound recorded in the external sound recorder;

a breathing pace analyzing unit that analyzes, using information of intervals of the audible sound and no sound found by the sound/silence determining unit and the external sound, a breathing pace indicating a cycle of a breathing estimated interval during which breathing is estimated; and

an apnea interval extracting unit that extracts a silent interval within the breathing estimated interval based on the breathing pace analyzed by the breathing pace analyzing unit.

9. A method for sleep apnea detection, comprising:

recording external sound in environment;

determining whether an audible sound or no sound is found in the external sound recorded at the recording;

analyzing, using information of intervals of the audible sound and no sound found at the determining and the external sound, a breathing pace indicating a cycle of a breathing estimated interval during which breathing is estimated; and

extracting a silent interval within the breathing estimated interval based on the breathing pace analyzed at the analyzing.