Wearable cuff-less PTT-based system for overnight blood pressure monitoring
- Resource Type
- Conference
- Authors
- Zheng, Yali; Yan, Bryan P; Zhang, Yuanting; Yu, C. M.; Poon, Carmen C.Y.
- Source
- 2013 35th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC) Engineering in Medicine and Biology Society (EMBC), 2013 35th Annual International Conference of the IEEE. :6103-6106 Jul, 2013
- Subject
- Engineered Materials, Dielectrics and Plasmas
Biomedical monitoring
Electrocardiography
Correlation
Monitoring
Blood pressure
Conferences
- Language
- ISSN
- 1094-687X
1558-4615
A wearable cuff-less pulse transit time (PTT) based monitoring device is developed for ambulatory blood pressure (BP) monitoring. Ten healthy subjects (aged 27±4 years old) underwent 24-hour ambulatory BP monitoring using 1) a standard brachial cuff-based oscillometric device as reference and 2) the proposed cuff-less PTT measuring system. Raw PTT and BP measurements were linearly interpolated and then smoothed by a low-pass filter to remove aliasing effect caused by the low sampling rate and synchronized. Resampled PTT and BP were assessed for correlation using correlation coefficients and Bland-Altman plots. Our study showed that PTT estimated systolic BP most accurately within 4.8 ± 4.3 mmHg on healthy young subjects during sleep time. We conclude from this study that the proposed cuff-less PTT-based BP monitoring system has potential to be a less intrusive alternative to standard oscillometric method for long-term overnight BP monitoring.