Next Article in Journal
Eyes of Things
Next Article in Special Issue
Emotional Self-Regulation of Individuals with Autism Spectrum Disorders: Smartwatches for Monitoring and Interaction
Previous Article in Journal
A Stretchable Electromagnetic Absorber Fabricated Using Screen Printing Technology
Previous Article in Special Issue
Characterizing Dynamic Walking Patterns and Detecting Falls with Wearable Sensors Using Gaussian Process Methods
Article Menu
Issue 5 (May) cover image

Export Article

Open AccessArticle
Sensors 2017, 17(5), 1176;

A Cuffless Blood Pressure Measurement Based on the Impedance Plethysmography Technique

Department of Computer Science and Information Engineering, Chaoyang University of Technology, Taichung 41349, Taiwan
Department of Biomedical Imaging and Radiological Science, China Medical University, Taichung 40402, Taiwan
Institute of Medicine, School of Medicine, Chung-Shan Medical University; Department of Internal Medicine, Chung-Shan Medical University Hospital, Taichung 40201, Taiwan
Authors to whom correspondence should be addressed.
Academic Editors: Edward Sazonov and Subhas Chandra Mukhopadhyay
Received: 10 April 2017 / Revised: 11 May 2017 / Accepted: 16 May 2017 / Published: 21 May 2017
(This article belongs to the Special Issue Wearable and Ambient Sensors for Healthcare and Wellness Applications)
Full-Text   |   PDF [8267 KB, uploaded 23 May 2017]   |  


In the last decade, cuffless blood pressure measurement technology has been widely studied because it could be applied to a wearable apparatus. Electrocardiography (ECG), photo-plethysmography (PPG), and phonocardiography are always used to detect the pulse transit time (PTT) because the changed tendencies of the PTT and blood pressure have a negative relationship. In this study, the PPG signal was replaced by the impedance plethysmography (IPG) signal and was used to detect the PTT. The placement and direction of the electrode array for the IPG measurement were discussed. Then, we designed an IPG ring that could measure an accurate IPG signal. Twenty healthy subjects participated in this study. The changes in blood pressure after exercise were evaluated through the changes of the PTT. The results showed that the change of the systolic pressure had a better relationship with the change of the PTTIPG than that of the PTTPPG (r = 0.700 vs. r = 0.450). Moreover, the IPG ring with spot electrodes would be more suitable to develop with the wearable cuffless blood pressure monitor than the PPG sensor. View Full-Text
Keywords: cuffless blood pressure measurement; impedance plethysmography; pulse transit time cuffless blood pressure measurement; impedance plethysmography; pulse transit time

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

Share & Cite This Article

MDPI and ACS Style

Liu, S.-H.; Cheng, D.-C.; Su, C.-H. A Cuffless Blood Pressure Measurement Based on the Impedance Plethysmography Technique. Sensors 2017, 17, 1176.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics



[Return to top]
Sensors EISSN 1424-8220 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top