Optical fiber head for monitoring of heart rate and blood oxygenation

2016 ◽  
Author(s):  
Kacper Hoffmann ◽  
Agata Baranowska ◽  
Jacek Zmojda ◽  
Marcin Kochanowicz ◽  
Dominik Dorosz
Keyword(s):  
Heart Rate ◽  
Optical Fiber ◽  
Blood Oxygenation

scholarly journals Accurate Estimation of Heart and Respiration Rates Based on an Optical Fiber Sensor Using Adaptive Regulations and Statistical Classifications Spectrum Analysis

2021 ◽  
Vol 3 ◽  
Author(s):  
Rongjian Zhao ◽  
Lidong Du ◽  
Zhan Zhao ◽  
Xianxiang Chen ◽  
Jie Sun ◽  
...  
Keyword(s):  
Heart Rate ◽  
Individual Differences ◽  
Optical Fiber ◽  
Confidence Intervals ◽  
Respiration Rate ◽  
Spectrum Analysis ◽  
Optical Fiber Sensor ◽  
Fiber Sensor ◽  
Respiration Rates ◽  
The Mean

The aim of this work is to present a method for accurately estimating heart and respiration rates under different actual conditions based on a mattress which was integrated with an optical fiber sensor. During the estimation, a ballistocardiogram (BCG) signal, which was obtained from the optical fiber sensor, was used for extracting the heart rate and the respiration rate. However, due to the detrimental effects of the differential detector, self-interference, and variation of installation status of the sensor, the ballistocardiogram (BCG) signal was difficult to detect. In order to resolve the potential concerns of individual differences and body interferences, adaptive regulations and statistical classifications spectrum analysis were used in this paper. Experiments were carried out to quantify heart and respiration rates of healthy volunteers under different breathing and posture conditions. From the experimental results, it could be concluded that (1) the heart rates of 40–150 beats per minute (bpm) and respiration rates of 10–20 breaths per minute (bpm) were measured for individual differences; (2) for the same individuals under four different posture contacts, the mean errors of heart rates were separately 1.60 ± 0.98 bpm, 1.94 ± 0.83 bpm, 1.24 ± 0.59 bpm, and 1.06 ± 0.62 bpm, in contrast, the mean errors of the polar beat device were 1.09 ± 0.96 bpm, 1.44 ± 0.99 bpm, and 1.78 ± 0.94 bpm. Furthermore, the experimental results were validated by conventional counterparts which used skin-contacting electrodes as their measurements. It was reported that the heart rate was 0.26 ± 2.80 bpm in 95% confidence intervals (± 1.96SD) in comparison with Philips sure-signs VM6 medical monitor, and the respiration rate was 0.41 ± 1.49 bpm in 95% confidence intervals (± 1.96SD) in comparison with ECG-derived respiratory (EDR) measurements for respiration rates. It was indicated that the developed system using adaptive regulations and statistical classifications spectrum analysis performed better and could easily be used under complex environments.

scholarly journals Measurement heart rate based on plastic optical fiber sensor

2019 ◽  
Vol 1170 ◽  
pp. 012074
Author(s):  
A Arifin ◽  
A K Lebang ◽  
M Yunus ◽  
S Dewang ◽  
I Idris ◽  
...  
Keyword(s):  
Heart Rate ◽  
Optical Fiber ◽  
Optical Fiber Sensor ◽  
Fiber Sensor ◽  
Plastic Optical Fiber

Polymer optical fiber-based sensor for simultaneous measurement of breath and heart rate under dynamic movements

2019 ◽  
Vol 109 ◽  
pp. 429-436 ◽  
Author(s):  
Arnaldo G. Leal-Junior ◽  
Camilo R. Díaz ◽  
Cátia Leitão ◽  
Maria José Pontes ◽  
Carlos Marques ◽  
...  
Keyword(s):  
Heart Rate ◽  
Optical Fiber ◽  
Simultaneous Measurement ◽  
Polymer Optical Fiber

Demonstration of a Remote Optical Measurement Configuration That Correlates With Breathing, Heart Rate, Pulse Pressure, Blood Coagulation, and Blood Oxygenation

2015 ◽  
Vol 103 (2) ◽  
pp. 248-262 ◽  
Author(s):  
Nisan Ozana ◽  
Israel Margalith ◽  
Yevgeny Beiderman ◽  
Mark Kunin ◽  
Gadi Abebe Campino ◽  
...  
Keyword(s):  
Heart Rate ◽  
Blood Coagulation ◽  
Pulse Pressure ◽  
Optical Measurement ◽  
Blood Oxygenation

Characteristic of Mayer Waves in Electrophysiological, Hemodynamic and Vascular Signals

2020 ◽  
Vol 30 (03) ◽  
pp. 2050003 ◽  
Author(s):  
K. J. Blinowska ◽  
P. Lachert ◽  
J. Zygierewicz ◽  
D. Janusek ◽  
P. Sawosz ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Heart Rate ◽  
Heart Rate Variability ◽  
Matching Pursuit ◽  
Blood Oxygenation ◽  
Common Mechanism ◽  
Mayer Waves ◽  
Time Frequency ◽  
Cerebral Blood Oxygenation ◽  
Central Pacemaker

We evaluated the properties of oscillations in the Mayer waves (MW) frequency range ([Formula: see text][Formula: see text]Hz) detected in blood pressure, heart rate variability, cerebral blood oxygenation changes and evolution of electroencephalographic (EEG) rhythms to elucidate the mechanisms of MW generation. We examined the persistence of MW in different signals and stability of their oscillations on the level of individual MW waveforms, which was achieved by applying matching pursuit (MP). MP yields adaptive time-frequency approximation of signal’s structures in terms of frequency, amplitude, time occurrence, and time-span. The number of waveforms contributing to 95% of the energy of the signals was vastly different for the time series, but the average number of waveforms conforming to the MW criteria was almost the same ([Formula: see text] per 120[Formula: see text]s epoch). In all the investigated signals, MW had the same distributions of frequency and the number of cycles. We show that the MW energy ratios in different signals varied strongly, [Formula: see text]. The highest percentage of MW energy was observed in blood pressure signals, heart rate variability, and reduced hemoglobin, in contrast to brain signals and oxygenated hemoglobin. The percentage of MW energy was related to the strength of causal influence exerted by them on the other signals. Our results indicate existence of a common mechanism of MW generation and support the hypothesis of MW generation in the baroreflex loop; however, they do not exclude the action of a central pacemaker.

Natural Odor Inhalers (AromaStick®) Outperform Red Bull® for Enhancing Cognitive Vigilance: Results From a Four-Armed, Randomized Controlled Study

2020 ◽  
pp. 003151252097083
Author(s):  
Rainer Schneider
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Essential Oil ◽  
Scanning Speed ◽  
Energy Drink ◽  
Blood Oxygenation ◽  
Controlled Study ◽  
Control Group ◽  
Randomized Controlled ◽  
Red Bull

Two recent publications demonstrated that specifically designed essential odor inhalers can enhance performance through (a) better selective attention and scanning speed and (b) physiological changes of increased heart rate variability and blood oxygenation. In this study, we compared two natural odor inhalers with a popular energy drink (Red Bull®) with regard to their ability to improve vigilance on a computerized attention test. We employed a four-armed, randomized controlled experimental design and used a modified version of the CompACT-Vi test module to investigate whether deep inhalations of essential oil scents improved vigilance. Both inhalers markedly improved the number of correctly identified targets and participants’ reaction time when compared to a control condition and consumption of Red Bull® (0.9 < d < 1.3). Additionally, the number of correctly solved mathematical sums during the second half of the vigilance test was substantially higher (d = 1.3) with the use of inhalers than for the control and Red Bull participants. Inhaler use was also associated with relatively increased heart rate variability (d = 1.0) as a mechanism of adapting to the experimental demands. Thus, short and deep inhalations of essential oil scents delivered directly to the nose improved vigilance, while a popular energy drink failed to show an effect beyond that of a control group receiving no stimulant.

scholarly journals Acute Effects of Tai Chi Training on Cognitive and Cardiovascular Responses in Late Middle-Aged Adults: A Pilot Study

2018 ◽  
Vol 2018 ◽  
pp. 1-7 ◽  
Author(s):  
Tiffany C. Y. Cheung ◽  
Karen P. Y. Liu ◽  
Janet Y. H. Wong ◽  
Young-Hyeon Bae ◽  
Stanley Sai-Chuen Hui ◽  
...  
Keyword(s):  
Heart Rate ◽  
Skin Temperature ◽  
Perceived Stress ◽  
Stress Level ◽  
Tai Chi ◽  
Cardiovascular Responses ◽  
Blood Oxygenation ◽  
Middle Aged ◽  
Middle Aged Adults ◽  
Palmar Skin

This study explored the immediate effects of Tai Chi (TC) training on attention and meditation, perceived stress level, heart rate, oxygen saturation level in blood, and palmar skin temperature in late middle-aged adults. Twenty TC practitioners and 20 nonpractitioners volunteered to join the study. After baseline measurements were taken, the TC group performed TC for 10 minutes while their cognitive states and cardiovascular responses were concurrently monitored. The control group rested for the same duration in a standing position. Both groups were then reassessed. The participants’ attention and meditation levels were measured using electroencephalography; stress levels were measured using Perceived Stress Scale; heart rate and blood oxygenation were measured using an oximeter; and palmar skin temperature was measured using an infrared thermometer. Attention level tended to increase during TC and dropped immediately thereafter (p<0.001). Perceived stress level decreased from baseline to posttest in exclusively the TC group (p=0.005). Heart rate increased during TC (p<0.001) and decreased thereafter (p=0.001). No significant group, time, or group-by-time interaction effects were found in the meditation level, palmar skin temperature, and blood oxygenation outcomes. While a 10-minute TC training could temporarily improve attention and decrease perceived stress levels, it could not improve meditation, palmar skin temperature, or blood oxygenation among late middle-aged adults.

scholarly journals Design of Smart Steering Wheel for Unobtrusive Health and Drowsiness Monitoring

Sensors ◽  
2021 ◽  
Vol 21 (16) ◽  
pp. 5285
Author(s):  
Branko Babusiak ◽  
Adrian Hajducik ◽  
Stefan Medvecky ◽  
Michal Lukac ◽  
Jaromir Klarak
Keyword(s):  
Atrial Fibrillation ◽  
Cardiovascular Disease ◽  
Heart Rate ◽  
Heart Rate Variability ◽  
Cardiovascular Diseases ◽  
Real Life ◽  
Blood Oxygenation ◽  
Steering Wheel ◽  
Life Conditions ◽  
Monitoring Platform

This article describes the design of a smart steering wheel intended for use in unobtrusive health and drowsiness monitoring. The aging population, cardiovascular disease, personalized medicine, and driver fatigue were significant motivations for developing a monitoring platform in cars because people spent much time in cars. The purpose was to create a unique, comprehensive monitoring system for the driver. The crucial parameters in health or drowsiness monitoring, such as heart rate, heart rate variability, and blood oxygenation, are measured by an electrocardiograph and oximeter integrated into the steering wheel. In addition, an inertial unit was integrated into the steering wheel to record and analyze the movement patterns performed by the driver while driving. The developed steering wheel was tested under laboratory and real-life conditions. The measured signals were verified by commercial devices to confirm data correctness and accuracy. The resulting signals show the applicability of the developed platform in further detecting specific cardiovascular diseases (especially atrial fibrillation) and drowsiness.

scholarly journals Comprehensive pregnancy monitoring with a network of wireless, soft, and flexible sensors in high- and low-resource health settings

2021 ◽  
Vol 118 (20) ◽  
pp. e2100466118
Author(s):  
Dennis Ryu ◽  
Dong Hyun Kim ◽  
Joan T. Price ◽  
Jong Yoon Lee ◽  
Ha Uk Chung ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Heart Rate ◽  
Body Position ◽  
Vital Signs ◽  
Blood Oxygenation ◽  
Morbidity And Mortality ◽  
Low Resource Settings ◽  
Low Resource ◽  
Vital Signs Monitoring ◽  
Wide Range

Vital signs monitoring is a fundamental component of ensuring the health and safety of women and newborns during pregnancy, labor, and childbirth. This monitoring is often the first step in early detection of pregnancy abnormalities, providing an opportunity for prompt, effective intervention to prevent maternal and neonatal morbidity and mortality. Contemporary pregnancy monitoring systems require numerous devices wired to large base units; at least five separate devices with distinct user interfaces are commonly used to detect uterine contractility, maternal blood oxygenation, temperature, heart rate, blood pressure, and fetal heart rate. Current monitoring technologies are expensive and complex with implementation challenges in low-resource settings where maternal morbidity and mortality is the greatest. We present an integrated monitoring platform leveraging advanced flexible electronics, wireless connectivity, and compatibility with a wide range of low-cost mobile devices. Three flexible, soft, and low-profile sensors offer comprehensive vital signs monitoring for both women and fetuses with time-synchronized operation, including advanced parameters such as continuous cuffless blood pressure, electrohysterography-derived uterine monitoring, and automated body position classification. Successful field trials of pregnant women between 25 and 41 wk of gestation in both high-resource settings (n = 91) and low-resource settings (n = 485) demonstrate the system’s performance, usability, and safety.

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