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Showing 1 to 18 of 18 for “"Photoplethysmography ppg"”.
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Motion Artifact Reduction in Impedance Plethysmography Signal
… artifact from the electrocardiogram (ECG) and photoplethysmography (PPG) signals in the past few years. However, no such study exists for the Impedance Plethysmography (IP) signal. The IP signal can be used to monitor respiration in mobile devices. However, it is very susceptible to motion …
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Detecting Human Memory Processes via Bio-Signals
Bio signals, such as eye movement data, photoplethysmography (PPG), and electrodermal activity (EDA), can provide insight into various cognitive states. Previous work has shown that eye movements along with other bio-signals differ when viewing familiar versus unfamiliar faces. Signals such as …
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Motion artifact cancellation for wearable photoplethysmographic sensor
Photoplethysmography (PPG) is a non-invasive and unobtrusive technique to measure heart rate from the surface of the skin, by exposing a section of the skin to an LED light and measuring the changes in reflected light due to the blood pulsing through under the skin. However, PPG signals are highly …
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A wearable blood pressure sensor using oscillometric photoplethysmography and micro accelerometers
… and validated. A solid, coin-sized cuff-less photoplethysmography (PPG) sensor worn over a palpable artery is utilized to measure arterial blood pressure. Measurements are obtained through a modified oscillometric technique which eliminates the need for a high pressure cuff and instead, takes …
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Psychological Monitoring: Detecting Real-Time Emotional Changes
… a single, wearable-compatible signal through photoplethysmography (PPG). The tested model utilizes inter-beat interval (IBI) and pulse wave or pulse volume amplitude (PVA), which are tracked using an extended Kalman filter (EKF) to extract frequencies (VLF-UHF) and standard heart rate …
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Development of a new device to measure finger's mean arterial pressure
… This type of measurement is derived from the photoplethysmography (PPG) signal which conventionally used to estimate the oxygen saturation level. A series of tests based on 10 subjects have been conducted in order to validate the Finger M.A.P device. From statistical analysis using Pearson …
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Soft Electronics and Sensors for Wearable Healthcare Applications
… electronic components and dry electrodes for photoplethysmography (PPG) and electrocardiography (ECG) recordings. Based on the developed PEDOT:PSS solution with high conductivity, we fabricated a porous PDMS sponge coated with conductive PEDOT:PSS to make electrodes with reduced electrode-skin …
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Wireless Monitoring of Driver's Pulse Rate and Temperature Using Hand Gloves Approach
… Here the pulse sensor uses a technique called Photoplethysmography (PPG) and temperature sensor used here is LM35. The pulse sensor mounted on the index finger of the gloves acquires the raw data from the human body and then sends to the microcontroller using conductive thread. The conductive …
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Photoplethysmography for non-invasive measurement of bone hemodynamic responses to changes in external pressure
… long duration human spaceflight. Developments in photoplethysmography (PPG) hardware have made it a promising tool for non-invasive bone hemodynamic measurements. The aims of this thesis are to: 1) validate the use of PPG as a tool for non-invasive bone hemodynamic measurements, 2) characterize …
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A comparative analysis of instructional techniques toward long-term positive ergonomics transformation for the early career sonographer
… the likelihood of such future WRMSD complaints. Photoplethysmography (PPG) recordings during challenging maneuvers demonstrated additional benefit toward the reduction of negative scan behaviors; while transformational learning demonstrated significant benefit in both reducing negative scan …
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Reflectance photoplethysmography for non-invasive monitoring of tissue perfusion
… techniques have been developed over the decades. Photoplethysmography (PPG) is an optical technique that measures blood volume variations in vascular tissue and it is well known for its utilisation in pulse oximetry for the estimation of arterial blood oxygen saturation (SpO2). In pulse oximetry, …
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Intra-operative optical monitoring of bowel tissue viability based on photoplethysmography and laser doppler flowmetry
… techniques, laser Doppler flowmetry (LDF) and Photoplethysmography (PPG), into one probe intended for assessment of perfusion in abdominal tissue during bowel resection intraoperatively. In PPG, changes in transmission of light through tissue due to pulsation of small arteries can be monitored …
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A Robust Algorithm for Identification of Motion Artifacts in Photoplethysmography Signals
Photoplethysmography(PPG) is commonly used as a means of continuous health monitoring. Many clinically relevant parameters like heart rate (HR), blood oxygenaton level (SPO2) are derived from the sensor measurements using PPG. Presence of motion artifacts in the signal decreases the accuracy of …
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Investigations of photoplethysmography in the assessment of haemodynamics, vascular mechanics and haemorheology
… hypothesis is to show for the first time that Photoplethysmography (PPG) has the potential to non‐invasively assess, in a qualifying and quantifying manner, the above parameters. Positives outcomes from such approach will establish the potential of the PPG as a preferential monitoring …
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In vivo investigations of photoplethysmograms and arterial oxygen saturation from the auditory canal in conditions of compromised peripheral perfusion
Pulse oximeters rely on the technique of photoplethysmography (PPG) to estimate arterial oxygen saturation (SpO2). In conditions of poor peripheral perfusion such as hypotension, hypothermia, and vasoconstriction, the PPG signals detected are often small and noisy, or in some cases unobtainable. …
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Exploring the Potential of Earables for Personal-Scale Sensing
… microphones (facing in-the-ear-canal); (iii) photoplethysmography sensors (PPG). Data collected by earables augmented with these sensors in and around the ear may enable several personal-scale sensing applications such as augmented/virtual reality, improved navigation, medical rehabilitation, …
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Investigating Maladaptive Habit Formation and Threat Influences in Obsessive-Compulsive Disorder
… (sAA) and heart rate data collected by photoplethysmography (PPG). Those experiencing a state-stressor prior to the PIT procedure showed significantly increased arousal and stress levels. Correlational analyses were conducted between trait-stress and compulsivity and general and specific …
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Precision Technologies and Data Analytics for Monitoring Ruminants
… and precision of a low-cost wearable sensor photoplethysmography (PPG) sensor in monitoring heart-rate (HR) of sheep housed under high-temperature conditions. The results revealed poor accuracy and precision in detecting HR changes using the PPG sensor. Future studies should explore …