| Budget Amount *help |
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2013: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
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| Outline of Final Research Achievements |
It is important to know about a sudden blood pressure change that occurs in everyday life and may pose a danger to human health. In this study, a new non-contact method to measure blood pressure variability is proposed. As an index related to blood pressure variability, the time delay is calculated between two pulse waves obtained from different parts of a subject’s face or hand captured by a video camera. This index is considered to have a negative correlation with blood pressure variability because it approximates the pulse transit time obtained from a photoplethysmograph. The proposed index was calculated from video images of 20 healthy subjects performing the Valsalva maneuver. The results showed that the correlation coefficient between blood pressure and the proposed index was approximately 0.65.
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