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Pulse oximeter

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https://www.readbyqxmd.com/read/28328974/retinal-oximetry-measures-systemic-hypoxia-in-central-nervous-system-vessels-in-chronic-obstructive-pulmonary-disease
#1
Thorunn Scheving Eliasdottir, David Bragason, Sveinn Hakon Hardarson, Charles Vacchiano, Thorarinn Gislason, Jona Valgerdur Kristjansdottir, Gudrun Kristjansdottir, Einar Stefánsson
BACKGROUND: Determination of the blood oxyhemoglobin saturation in the retinal vessels of the eye can be achieved through spectrophotometric retinal oximetry which provides access to the state of oxyhemoglobin saturation in the central nervous system circulation. The purpose of this study was to test the capability of the Oxymap T1 oximeter to detect systemic hypoxemia and the effect of supplemental oxygen on retinal vessel oxyhemoglobin saturation. METHODS: Oxygen saturation of hemoglobin in retinal arterioles and venules was measured in 11 subjects with severe chronic obstructive pulmonary disease (COPD) on long term oxygen therapy...
2017: PloS One
https://www.readbyqxmd.com/read/28324969/a-clinical-study-of-short-term-sternal-photoplethysmography-recordings-from-patients-with-obstructive-airways-diseases
#2
Shadi S Chreiteh, Dorthe B Saadi, Bo Belhage, Nassim Nabipour, Karsten Hoppe, Erik V Thomsen
Traditionally, measurements of the oxygen saturation (SpO2) has been confound to the extremities. In this study, we therefore investigated the possibility for reliable estimation of clinically relevant SpO2 levels from photoplethysmography (PPG) obtained on the sternum of patients with obstructive airway diseases. We initiated the study with a calibration of a prototype sternal PPG sensor. In accordance with the ISO 80601-2-61:2011 guidelines, the calibration was conducted as a controlled desaturation study...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28324937/data-driven-estimation-of-blood-pressure-using-photoplethysmographic-signals
#3
Shi Chao Gao, Peter Wittek, Li Zhao, Wen Jun Jiang
Noninvasive measurement of blood pressure by optical methods receives considerable interest, but the complexity of the measurement and the difficulty of adjusting parameters restrict applications. We develop a method for estimating the systolic and diastolic blood pressure using a single-point optical recording of a photoplethysmographic (PPG) signal. The estimation is data-driven, we use automated machine learning algorithms instead of mathematical models. Combining supervised learning with a discrete wavelet transform, the method is insensitive to minor irregularities in the PPG waveform, hence both pulse oximeters and smartphone cameras can record the signal...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28291458/wearable-pulse-oximetry-measurements-on-the-torso-arms-and-legs-a-proof-of-concept
#4
Marcus Kramer, Aaron Lobbestael, Emily Barten, John Eian, Gregory Rausch
For decades pulse oximeters designed for use on the head, hands, or feet have provided invaluable estimates of oxygen saturation to medical personal attending to combat casualties. However, traditional placement sites are not ideal for the relatively new paradigm of continuous battlefield telemonitoring. To assess the feasibility of oximetry on nontraditional body sites, 42 healthy volunteers were enrolled, consented, and underwent an industry standard induced-hypoxia study. During the study volunteers used prototype wearable oximeters, designed for the torso, arms, and legs...
March 2017: Military Medicine
https://www.readbyqxmd.com/read/28287994/ensemble-empirical-mode-decomposition-with-principal-component-analysis-a-novel-approach-for-extracting-respiratory-rate-and-heart-rate-from-photoplethysmographic-signal
#5
Mohammod Abdul Motin, Chandan Karmakar, Marimuthu Palaniswami
The photoplethysmographic (PPG) signal measures the local variations of blood volume in tissues, reflecting the peripheral pulse modulated by cardiac activity, respiration and other physiological effects. Therefore, PPG can be used to extract the vital cardiorespiratory signals like heart rate (HR), and respiratory rate (RR) and this will reduce the number of sensors connected to the patient's body for recording these vital signs. In this paper, we propose an algorithm based on ensemble empirical mode decomposition with principal component analysis (EEMD-PCA) as a novel approach to estimate HR and RR simultaneously from PPG signal...
March 7, 2017: IEEE Journal of Biomedical and Health Informatics
https://www.readbyqxmd.com/read/28285479/effectiveness-of-pulse-oximetry-versus-doppler-for-tourniquet-monitoring
#6
Piper L Wall, Charisse M Buising, Lisa Grulke, Alexander Troester, Nicholas Bianchina, Shannon White, Rosemarie Freymark, Ali Hassan, James W Hopkins, Catherine Hackett Renner, Sheryl M Sahr
BACKGROUND: Pulse oximeters are common and include arterial pulse detection as part of their methodology. The authors investigated the possible usefulness of pulse oximeters for monitoring extremity tourniquet arterial occlusion. METHODS: Tactical Ratcheting Medical Tourniquets were tightened to the least Doppler-determined occluding pressure at mid-thigh or mid-arm locations on one limb at a time on all four limbs of 15 volunteers. A randomized block design was used to determine the placement locations of three pulse oximeter sensors on the relevant digits...
2017: Journal of Special Operations Medicine: a Peer Reviewed Journal for SOF Medical Professionals
https://www.readbyqxmd.com/read/28274235/multicenter-study-on-the-effectiveness-of-the-pre-epiglottic-baton-plate-for-airway-obstruction-and-feeding-problems-in-robin-sequence
#7
Christian F Poets, Christoph Maas, Wolfgang Buchenau, Joerg Arand, Anne Vierzig, Bert Braumann, Silvia M├╝ller-Hagedorn
BACKGROUND: Treatment of Robin sequence is often either invasive or of unproven effectiveness. The pre-epiglottic baton plate (PEBP) is a well-studied alternative, yet is not widely applied internationally. We report on a prospective 3-center cohort study investigating this treatment. Based on an agreed protocol, parents of infants with Robin sequence referred to participating centers were offered enrollment, which involved taking a maxillary cast followed by endoscopy to fit the plate and sleep studies to monitor its effectiveness...
March 9, 2017: Orphanet Journal of Rare Diseases
https://www.readbyqxmd.com/read/28274051/effectiveness-of-two-topical-anaesthetic-agents-used-along-with-audio-visual-aids-in-paediatric-dental-patients
#8
Nidhi Agarwal, Jayata Dhawan, Dipanshu Kumar, Ashish Anand, Karan Tangri
INTRODUCTION: Topical anaesthetic agents enable pain free intraoral procedures, symptomatic pain relief for toothache, superficial mucosal lesions and pain related to post extraction time. Most common anxiety provoking and fearful experience for children in dental operatory is administration of local anaesthesia because on seeing the needle, children usually become uncooperative. One of recent trend of behaviour management technique is using non-aversive techniques out of which audiovisual distraction has emerged as a very successful technique for managing children in dental settings...
January 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28270380/exacerbations-in-chronic-obstructive-pulmonary-disease-identification-and-prediction-using-a-digital-health-system
#9
Syed Ahmar Shah, Carmelo Velardo, Andrew Farmer, Lionel Tarassenko
BACKGROUND: Chronic obstructive pulmonary disease (COPD) is a progressive, chronic respiratory disease with a significant socioeconomic burden. Exacerbations, the sudden and sustained worsening of symptoms, can lead to hospitalization and reduce quality of life. Major limitations of previous telemonitoring interventions for COPD include low compliance, lack of consensus on what constitutes an exacerbation, limited numbers of patients, and short monitoring periods. We developed a telemonitoring system based on a digital health platform that was used to collect data from the 1-year EDGE (Self Management and Support Programme) COPD clinical trial aiming at daily monitoring in a heterogeneous group of patients with moderate to severe COPD...
March 7, 2017: Journal of Medical Internet Research
https://www.readbyqxmd.com/read/28269567/a-wrist-worn-spo2-monitor-with-custom-finger-probe-for-motion-artifact-removal
#10
S P Preejith, Akshay S Ravindran, Rohan Hajare, Jayaraj Joseph, Mohanasankar Sivaprakasam
Continuous monitoring of blood oxygen saturation (SpO2) level and heart rate is critical in surgery, ICUs and patients suffering from Chronic Obstructive Pulmonary Diseases. Pulse oximeters which compute SpO2 using transmittance photoplethysmography (PPG), is widely accepted for continuous monitoring. Presence of motion artifacts in PPG signals is a major obstacle in the extraction of reliable cardiovascular parameters, in real time and continuous monitoring applications. In this paper, a wrist worn device with a custom finger probe with an integrated accelerometer to remove motion artifacts is presented...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28269331/video-monitoring-of-oxygen-saturation-during-controlled-episodes-of-acute-hypoxia
#11
Paul S Addison, David M H Foo, Dominique Jacquel, Ulf Borg
A method for extracting video photoplethysmographic information from an RGB video stream is tested on data acquired during a porcine model of acute hypoxia. Cardiac pulsatile information was extracted from the acquired signals and processed to determine a continuously reported oxygen saturation (SvidO2). A high degree of correlation was found to exist between the video and a reference from a pulse oximeter. The calculated mean bias and accuracy across all eight desaturation episodes were -0.03% (range: -0.21% to 0...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28269139/pulsecam-high-resolution-blood-perfusion-imaging-using-a-camera-and-a-pulse-oximeter
#12
Mayank Kumar, James Suliburk, Ashok Veeraraghavan, Ashutosh Sabharwal
Measuring blood perfusion is important in medical care as an indicator of injury and disease. However, currently available devices to measure blood perfusion like laser Doppler flowmetry are bulky, expensive, and cumbersome to use. An alternative low-cost and portable camera-based blood perfusion measurement system has recently been proposed, but such camera-only system produces noisy low-resolution blood perfusion maps. In this paper, we propose a new multi-sensor modality, named PulseCam, for measuring blood perfusion by combining a traditional pulse oximeter with a video camera in a unique way to provide low noise and high-resolution blood perfusion maps...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28269118/an-eemd-pca-approach-to-extract-heart-rate-respiratory-rate-and-respiratory-activity-from-ppg-signal
#13
Mohammod Abdul Motin, Chandan Kumar Karmakar, Marimuthu Palaniswami
The pulse oximeter's photoplethysmographic (PPG) signals, measure the local variations of blood volume in tissues, reflecting the peripheral pulse modulated by cardiac activity, respiration and other physiological effects. Therefore, PPG can be used to extract the vital cardiorespiratory signals like heart rate (HR), respiratory rate (RR) and respiratory activity (RA) and this will reduce the number of sensors connected to the patient's body for recording vital signs. In this paper, we propose an algorithm based on ensemble empirical mode decomposition with principal component analysis (EEMD-PCA) as a novel approach to estimate HR, RR and RA simultaneously from PPG signal...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28268987/identifying-individual-sleep-apnea-hypoapnea-epochs-using-smartphone-based-pulse-oximetry
#14
Ainara Garde, Parastoo Dekhordi, J Mark Ansermino, Guy A Dumont
Sleep apnea, characterized by frequent pauses in breathing during sleep, poses a serious threat to the healthy growth and development of children. Polysomnography (PSG), the gold standard for sleep apnea diagnosis, is resource intensive and confined to sleep laboratories, thus reducing its accessibility. Pulse oximetry alone, providing blood oxygen saturation (SpO2) and blood volume changes in tissue (PPG), has the potential to identify children with sleep apnea. Thus, we aim to develop a tool for at-home sleep apnea screening that provides a detailed and automated 30 sec epoch-by-epoch sleep apnea analysis...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28268883/long-term-quasi-continuous-oxygen-saturation-levels-obtained-from-sternal-photoplethysmography-on-patients-with-obstructive-lung-diseases
#15
Shadi S Chreiteh, Dorthe B Saadi, Bo Belhage, Nassim Nabipour, Karsten Hoppe, Erik V Thomsen
Calculation of long-term quasi-continuous oxygen saturation (SpO2) levels is highly relevant for critically ill patients. The purpose of this study is therefore to conduct a preliminary investigation of the clinical reliability of long-term photoplethysmography (PPG) recordings obtained from the sternum of patients admitted to the hospital with obstructive lung diseases. Due to the lack of a gold standard reference that is suitable for long-term monitoring without interfering with the patient's activity level, we extracted reliable segments based on knowledge from the basic pulse oximeter theory as well as knowledge about the inherent physiological regulation of the SpO2 levels...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28250983/quantitative-assessment-of-the-impact-of-blood-pulsation-on-intraocular-pressure-measurement-results-in-healthy-subjects
#16
Robert Koprowski, Lei Tian
Background. Blood pulsation affects the results obtained using various medical devices in many different ways. Method. The paper proves the effect of blood pulsation on intraocular pressure measurements. Six measurements for each of the 10 healthy subjects were performed in various phases of blood pulsation. A total of 8400 corneal deformation images were recorded. The results of intraocular pressure measurements were related to the results of heartbeat phases measured with a pulse oximeter placed on the index finger of the subject's left hand...
2017: Journal of Ophthalmology
https://www.readbyqxmd.com/read/28237449/oxygen-saturation-targets-the-wrinkle-in-the-pulse-oximeter-calibration-software-provides-another-wrinkle
#17
Clyde J Wright
No abstract text is available yet for this article.
March 2017: Journal of Pediatrics
https://www.readbyqxmd.com/read/28227822/a-wrist-worn-spo2-monitor-with-custom-finger-probe-for-motion-artifact-removal
#18
S P Preejith, Akshay S Ravindran, Rohan Hajare, Jayaraj Joseph, Mohanasankar Sivaprakasam, S P Preejith, Akshay S Ravindran, Rohan Hajare, Jayaraj Joseph, Mohanasankar Sivaprakasam, Akshay S Ravindran, Rohan Hajare, Sp Preejith, Jayaraj Joseph, Mohanasankar Sivaprakasam
Continuous monitoring of blood oxygen saturation (SpO2) level and heart rate is critical in surgery, ICUs and patients suffering from Chronic Obstructive Pulmonary Diseases. Pulse oximeters which compute SpO2 using transmittance photoplethysmography (PPG), is widely accepted for continuous monitoring. Presence of motion artifacts in PPG signals is a major obstacle in the extraction of reliable cardiovascular parameters, in real time and continuous monitoring applications. In this paper, a wrist worn device with a custom finger probe with an integrated accelerometer to remove motion artifacts is presented...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227573/video-monitoring-of-oxygen-saturation-during-controlled-episodes-of-acute-hypoxia
#19
Paul S Addison, David M H Foo, Dominique Jacquel, Ulf Borg, Paul S Addison, David M H Foo, Dominique Jacquel, Ulf Borg, Ulf Borg, Dominique Jacquel, Paul S Addison, David M H Foo
A method for extracting video photoplethysmographic information from an RGB video stream is tested on data acquired during a porcine model of acute hypoxia. Cardiac pulsatile information was extracted from the acquired signals and processed to determine a continuously reported oxygen saturation (SvidO2). A high degree of correlation was found to exist between the video and a reference from a pulse oximeter. The calculated mean bias and accuracy across all eight desaturation episodes were -0.03% (range: -0.21% to 0...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227368/pulsecam-high-resolution-blood-perfusion-imaging-using-a-camera-and-a-pulse-oximeter
#20
Mayank Kumar, James Suliburk, Ashok Veeraraghavan, Ashutosh Sabharwal, Mayank Kumar, James Suliburk, Ashok Veeraraghavan, Ashutosh Sabharwal, Mayank Kumar, James Suliburk, Ashok Veeraraghavan, Ashutosh Sabharwal
Measuring blood perfusion is important in medical care as an indicator of injury and disease. However, currently available devices to measure blood perfusion like laser Doppler flowmetry are bulky, expensive, and cumbersome to use. An alternative low-cost and portable camera-based blood perfusion measurement system has recently been proposed, but such camera-only system produces noisy low-resolution blood perfusion maps. In this paper, we propose a new multi-sensor modality, named PulseCam, for measuring blood perfusion by combining a traditional pulse oximeter with a video camera in a unique way to provide low noise and high-resolution blood perfusion maps...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
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