reflectance photoplethysmography
Forehead reflectance photoplethysmography to monitor heart rate: preliminary results from neonatal patients
... Around 5%–10% of newborn babies require some form of resuscitation at birth and heart rate (HR) is the best guide of efficacy. We report the development and first trial of a device that continuously monitors neonatal HR, ...
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A Pulsatile Optical Tissue Phantom for the Investigation of Light-Tissue Interaction in Reflectance Photoplethysmography
... in reflectance photoplethysmography (PPG), utilizing a homogenous pulsatile phantom that exhibits the broad optical absorbance and scattering properties of human ...
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Esophageal pulse oximetry utilizing reflectance photoplethysmography
... Abstract—Peripheral perfusion is often poor and barely pulsatile in patients undergoing prolonged major surgery. Hence, the arterial blood oxygen saturation (SpO 2 ) readings from commercial finger pulse oximeters can ...
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Investigation of finger reflectance photoplethysmography in volunteers undergoing a local sympathetic stimulation
... The experimental protocol for this study was approved by the Senate Research Committee at City University London. Twelve healthy subjects were recruited, 5 females, 7 males, aged 18-45 years (mean age ± SD, 26.9 ± 4.6 ...
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Reflectance Photoplethysmography as Non-Invasive Monitoring of Tissue Blood Perfusion.
... decades Photoplethysmography (PPG) has been used as noninvasive technique for monitoring arterial oxygen saturation by Pulse Oximetry (PO), whereas Near Infrared Spectroscopy (NIRS) has been employed for ...
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Evaluation of a combined reflectance photoplethysmography and laser Doppler flowmetry surface probe
... light. Photoplethysmography (PPG) involves two basic forms of optoelectronic which one for emitting monochromatic light into tissue and the other for collecting the light reflected back, or through, and not ...
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Evaluation of a combined reflectance photoplethysmography and laser Doppler flowmetry surface probe
... Many investigators have reported periodic variations in blood volume in the peripheral vascular bed due to respiration, evident as Respiratory-Induced Intensity Variations (RIIVs) on recorded photoplethysmography ...
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Investigating optical path and differential pathlength factor in reflectance photoplethysmography for the assessment of perfusion
... Abstract. Photoplethysmography (PPG) is an optical noninvasive technique with the potential for assessing tissue perfusion. The relative time-change in the concentration of oxyhemoglobin and deoxyhemoglobin in the ...
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Investigation of Pulse Transit Times utilizing multisite reflectance photoplethysmography under conditions of artificially induced peripheral vasoconstriction
... Two reflectance finger PPG probes, optically identical to the ear canal probe were also developed to facilitate calculation of PTT from the left and right hand and also allow comparisons between PTTs calculated ...
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Free flap pulse oximetry utilizing reflectance photoplethysmography
... flap photoplethysmography processing system which, as well as facilitating in assessing any variation in volume of arterial blood in the post-operative period in the flap it would also allow the estimation of ...
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Reflectance photoplethysmography for non-invasive monitoring of tissue perfusion
... in order to allocate the required optical components and connections to the PPG pro- cessing system. Figure 6.4a shows the PCB footprint for the RPS1 sensor. The pads were designed for the placement of the LEDs and ...
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Free flap pulse oximetry utilizing reflectance photoplethysmography
... wavelengths. Photoplethysmography has widespread clinical applications such as pulse oximetry, where the technology is utilized to determine the oxygen saturation of arterial blood (SpO 2 ) by ...
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Accuracy of reflectance photoplethysmography on detecting cuff-induced vascular occlusions
... Photoplethysmography (PPG) is a noninvasive optical technique in which light is applied to the tissue and the backscattered and reflected light is detected by a photodetector. The signal produced by the ...
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Development of an intraluminal intestinal photoplethysmography sensor
... veloped reflectance photoplethysmography/pulse oximetry sensor comprises of two emitters (red and infrared) and a ...A photoplethysmography processing and data acquisition system was also ...quality ...
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Development of a Reflectance Photoplethysmogram Based Heart Rate Monitoring Device
... of reflectance photoplethysmography (PPG) to detect the pulse from the fingertip, filter and amplify the pulse using two-stage OP-Amp, count and decodes the pulse with the aid of a microcontroller and ...
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Use Of Spectral Reflectance For Sensitive Waveband Determination For Soil Organic Matter
... The biological decomposition of residues, roots and litter in soil is the soil organic matter. Soil chemical properties were determined using the standard laboratory methods. The SOM values of soil organic matter were ...
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Investigation of changes in thickness and reflectivity from layered retinal structures of healthy and diabetic eyes with optical coherence tomography
... total reflectance including average values of reflectivity normalized to the maximum value within the whole retina (RIR) and reflectivity with normaliza- tion to the RPE reflectance ...
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A finger photoplethysmography waveform during the valsalva maneuver detects changes in left heart filling pressure after hemodialysis
... Finger photoplethysmography conveniently pro- vides a continuous pressure surrogate waveform during the Valsalva ...finger photoplethysmography waveform correlates well with invasively measured left ...
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Multispectral, Fluorescent and Photoplethysmographic Imaging for Remote Skin Assessment
... delineation. Photoplethysmography video-imagers ensure remote detection of cutaneous blood pulsations and can provide real-time information on cardiovascular parameters and anesthesia ...
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An Algorithm for Classification of Algal Blooms Using MODIS Aqua Data in Oceanic Waters around India
... There have been two different spectral signatures rec- ognized from the MODIS-Aqua data for Noctiluca blooms, which are often reported as N. scintillans and N. milaris. However, some studies have recorded N. milaris as ...
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