Journal ArticleDOI
Monitoring Arterial Pulse Waves With Synchronous Body Sensor Network
Reads0
Chats0
TLDR
A wireless body sensor network for arterial pulse wave (PW) measurements is presented and tested with ten subjects and shows that a large number of PWs should be analyzed before making conclusions based on the calculated indices, which suggests that these parameter values may vary more than 20% in a period of 100 s.Abstract:
A wireless body sensor network for arterial pulse wave (PW) measurements is presented and tested with ten subjects. The system is capable of recording both mechanical PW contours with sensors made of a low-cost polypropylene-based material called electromechanical film (EMFi) and volume pulse signal with photoplethysmographic transducers. By using both types of sensors, the PW contours can be recorded from various locations. The system combined with automatic analysis methods enables to easily analyze the PW contours in order to obtain a more comprehensive view on the vascular health. To demonstrate this, two parameters used in literature, reflection index and radial augmentation index were calculated for the test subjects as a function of time. The results show that these parameter values may vary more than 20% in a period of 100 s, which suggests that a large number of PWs should be analyzed before making conclusions based on the calculated indices. In addition, the effects of the static bias force to the mechanical PW signal recorded with the EMFi sensors were studied. The PW signal with the maximum amplitude is obtained when the pressure caused by the static bias force corresponds to the contact pressure between typical systolic and diastolic blood pressures. The EMFi sensors used in the proposed system are a potential low-cost alternative for tonometric sensors in collecting data in the PW analysis for arterial screening.read more
Citations
More filters
Proceedings ArticleDOI
Comparison of HRV parameters derived from photoplethysmography and electrocardiography signals
TL;DR: HRV analysis was applied on beat-to-beat intervals obtained from ECG and PPG in 19 healthy male subjects and the results showed that the smallest error happens in SDNN and SD2 with relative error of 2.46% and 2%.
Journal ArticleDOI
Age dependence of arterial pulse wave parameters extracted from dynamic blood pressure and blood volume pulse waves
Mikko Peltokangas,Antti Vehkaoja,Jarmo Verho,Ville M. Mattila,Pekka Romsi,Jukka Lekkala,Niku Oksala +6 more
TL;DR: The results show that 14 out of 25 tested combined parameters have stronger age dependence than any of the individual parameters, which indicates that the age dependence of the parameters must be taken into account in further studies with atherosclerotic patients.
Journal ArticleDOI
Parameters Extracted From Arterial Pulse Waves as Markers of Atherosclerotic Changes: Performance and Repeatability
Mikko Peltokangas,Anca A. Telembeci,Jarmo Verho,Ville M. Mattila,Pekka Romsi,Antti Vehkaoja,Jukka Lekkala,Niku Oksala +7 more
TL;DR: The study shows that the amplitude ratios and time intervals between different PW peaks could be a useful additional tool for the detection of atherosclerosis and encourages us for further studies in this field.
Journal ArticleDOI
A Fully Printed Ultra-Thin Charge Amplifier for On-Skin Biosignal Measurements
Mika-Matti Laurila,Hiroyuki Matsui,Rei Shiwaku,Mikko Peltokangas,Jarmo Verho,Karem Lozano Montero,Tomohito Sekine,Antti Vehkaoja,Niku Oksala,Shizuo Tokito,Matti Mäntysalo +10 more
TL;DR: In this article, a fully printed charge amplifier for on-skin biosignal measurements is proposed, which is fabricated on an ultra-thin parylene substrate and consists of organic transistors, integrated bias and feedback resistors, and a feedback capacitor.
Journal ArticleDOI
Combining finger and toe photoplethysmograms for the detection of atherosclerosis.
Mikko Peltokangas,Antti Vehkaoja,Matti Huotari,Jarmo Verho,Ville M. Mattila,Juha Röning,Pekka Romsi,Jukka Lekkala,Niku Oksala +8 more
TL;DR: The study shows that the FT-plot analysis could be a useful additional tool for detecting atherosclerotic changes and provides evidence for the utility of multi-channel pulse wave measurements and analysis for the detection of atherosclerosis.
References
More filters
Journal ArticleDOI
Common Carotid Intima-Media Thickness and Risk of Stroke and Myocardial Infarction The Rotterdam Study
TL;DR: Evidence is provided that an increased common carotid IMT is associated with future cerebrovascular and cardiovascular events and Stroke risk increased gradually with increasing IMT.
Journal ArticleDOI
Mechanical Factors in Arterial Aging: A Clinical Perspective
TL;DR: Aortic stiffening is the principal cause of cardiovascular disease with age in persons who escape atherosclerotic complications, and the principal target is the smooth muscle in distributing arteries, whose relaxation has little effect on peripheral resistance but causes substantial reduction in the magnitude of wave reflection.
Journal ArticleDOI
Assessment of vasoactive agents and vascular aging by the second derivative of photoplethysmogram waveform.
Kenji Takazawa,Nobuhiro Tanaka,Masami Fujita,Osamu Matsuoka,Tokuyu Saiki,Masaru Aikawa,Sinobu Tamura,Chiharu Ibukiyama +7 more
TL;DR: The second derivative aging index was higher in 126 subjects with any history of diabetes mellitus, hypertension, hypercholesterolemia, and ischemic heart disease than in age-matched subjects without such a history and women had a higher aging index than men.
Journal ArticleDOI
Regional wave travel and reflections along the human aorta: a study with six simultaneous micromanometric pressures.
TL;DR: The geometric and elastic nonuniformity of the aorta results in two major sites of arterial wave reflection that influence the aORTic pressure waveforms in man.