Non-contact measurement of blood pressure variability using video images

2014 Fiscal Year Final Research Report

• Project/Area Number: 25870044
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Biomedical engineering/Biomaterial science and engineering; Life / Health / Medical informatics
• Research Institution: Tohoku University
• Principal Investigator: Sugita Norihiro 東北大学, 工学(系)研究科(研究院), 准教授 (90396458)
• Project Period (FY): 2013-04-01 – 2015-03-31
• Keywords: 血圧変動 / 脈波伝搬 / 高速度カメラ / 非接触計測

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.

Free Research Field

生体医工学