Non-contact measurement of blood pressure variability using video images

• 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
• Project Status: Completed (Fiscal Year 2014)
• Budget Amount: ¥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)
• 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.

Research Products

• [Presentation] 身体映像を用いた血圧変動推定 (2015)
  • Author(s): 小原一誠，杉田典大，阿部誠，吉田智契，吉澤誠
  • Organizer: 第54回日本生体医工学会大会
  • Place of Presentation: 名古屋国際会議場，名古屋
  • Year and Date: 2015-05-07 – 2015-05-09
  • Invited
• [Presentation] 映像からの脈波情報抽出 (2014)
  • Author(s): 小原一誠，阿部誠，杉田典大，吉田智契，吉澤誠
  • Organizer: 計測自動制御学会東北支50周年記念学術講演会
  • Place of Presentation: 青葉記念会館，仙台
  • Year and Date: 2014-12-11 – 2014-12-12
• [Patent(Industrial Property Rights)] 生体情報計測装置及び生体情報計測方法 (2015)
  • Inventor(s): 吉澤誠，杉田典大，阿部誠，山家智之，本間経康，小原一誠
  • Industrial Property Rights Holder: 吉澤誠，杉田典大，阿部誠，山家智之，本間経康，小原一誠
  • Industrial Property Rights Type: 特許
  • Industrial Property Number: 2015-070270
  • Filing Date: 2015-03-30