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Oxygen saturation

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https://www.readbyqxmd.com/read/28227822/a-wrist-worn-spo2-monitor-with-custom-finger-probe-for-motion-artifact-removal
#1
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/28227628/a-wearable-bluetooth-le-sensor-for-patient-monitoring-during-mri-scans
#2
Christian Vogt, Jonas Reber, Daniel Waltisberg, Lars Buthe, Josip Marjanovic, Niko Munzenrieder, Klaas P Pruessmann, Gerhard Troster, Christian Vogt, Jonas Reber, Daniel Waltisberg, Lars Buthe, Josip Marjanovic, Niko Munzenrieder, Klaas P Pruessmann, Gerhard Troster, Josip Marjanovic, Klaas P Pruessmann, Niko Munzenrieder, Christian Vogt, Lars Buthe, Gerhard Troster, Jonas Reber, Daniel Waltisberg
This paper presents a working prototype of a wearable patient monitoring device capable of recording the heart rate, blood oxygen saturation, surface temperature and humidity during an magnetic resonance imaging (MRI) experiment. The measured values are transmitted via Bluetooth low energy (LE) and displayed in real time on a smartphone on the outside of the MRI room. During 7 MRI image acquisitions of at least 1 min and a total duration of 25 min no Bluetooth data packets were lost. The raw measurements of the light intensity for the photoplethysmogram based heart rate measurement shows an increased noise floor by 50LSB (least significant bit) during the MRI operation, whereas the temperature and humidity readings are unaffected...
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
#3
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/28227297/features-of-cerebral-oxygenation-detects-brain-injury-in-premature-infants
#4
John M O'Toole, Mmoloki Kenosi, Daragh Finn, Geraldine B Boylan, Eugene M Dempsey, John M O'Toole, Mmoloki Kenosi, Daragh Finn, Geraldine B Boylan, Eugene M Dempsey, Daragh Finn, Eugene M Dempsey, Mmoloki Kenosi, John M Otoole, Geraldine B Boylan
Babies born prematurely can develop brain injury within days after birth. Early identification of high-risk infants enables appropriate clinical care to mitigate potential lifelong disabilities. Near infra-red spectroscopy is an established technology that can provide continuous measurements of cerebral oxygen saturation (rcSO2) over this critical period. We develop a feature set of the rcSO2 signal for the purpose of detecting brain injury. Our feature set contains amplitude, spectral, and fractal dimension features within 5 frequency bands...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227197/identifying-individual-sleep-apnea-hypoapnea-epochs-using-smartphone-based-pulse-oximetry
#5
Ainara Garde, Parastoo Dekhordi, J Mark Ansermino, Guy A Dumont, Ainara Garde, Parastoo Dekhordi, J Mark Ansermino, Guy A Dumont, J Mark Ansermino, Parastoo Dekhordi, Guy A Dumont, Ainara Garde
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/28227082/long-term-quasi-continuous-oxygen-saturation-levels-obtained-from-sternal-photoplethysmography-on-patients-with-obstructive-lung-diseases
#6
Shadi S Chreiteh, Dorthe B Saadi, Bo Belhage, Nassim Nabipour, Karsten Hoppe, Erik V Thomsen, Shadi S Chreiteh, Dorthe B Saadi, Bo Belhage, Nassim Nabipour, Karsten Hoppe, Erik V Thomsen, Bo Belhage, Karsten Hoppe, Shadi S Chreiteh, Nassim Nabipour, Erik V Thomsen, Dorthe B Saadi
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/28227079/a-clinical-study-of-short-term-sternal-photoplethysmography-recordings-from-patients-with-obstructive-airways-diseases
#7
Shadi S Chreiteh, Dorthe B Saadi, Bo Belhage, Nassim Nabipour, Karsten Hoppe, Erik V Thomsen, Shadi S Chreiteh, Dorthe B Saadi, Bo Belhage, Nassim Nabipour, Karsten Hoppe, Erik V Thomsen, Bo Belhage, Karsten Hoppe, Shadi S Chreiteh, Nassim Nabipour, Erik V Thomsen, Dorthe B Saadi
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/28225759/crystallization-of-silicon-dioxide-and-compositional-evolution-of-the-earth-s-core
#8
Kei Hirose, Guillaume Morard, Ryosuke Sinmyo, Koichio Umemoto, John Hernlund, George Helffrich, Stéphane Labrosse
The Earth's core is about ten per cent less dense than pure iron (Fe), suggesting that it contains light elements as well as iron. Modelling of core formation at high pressure (around 40-60 gigapascals) and high temperature (about 3,500 kelvin) in a deep magma ocean predicts that both silicon (Si) and oxygen (O) are among the impurities in the liquid outer core. However, only the binary systems Fe-Si and Fe-O have been studied in detail at high pressures, and little is known about the compositional evolution of the Fe-Si-O ternary alloy under core conditions...
February 22, 2017: Nature
https://www.readbyqxmd.com/read/28225477/mechanical-efficiency-in-chronic-obstructive-pulmonary-disease
#9
Willem Gosens, Alex J Vanʼt Hul, Joost M Oomen, Matthijs K C Hesselink, Lars B Borghouts
PURPOSE: The primary aims of this study were (1) to evaluate whole-body mechanical efficiency (ME) in a large group of chronic obstructive pulmonary disease (COPD) patients with a wide range of degrees of illness and (2) to examine how ME in COPD is related to absolute work rate and indices of disease severity during exercise testing. METHODS: A total of 569 patients (301 male patients; GOLD stage I: 28, GOLD stage II: 166, GOLD stage III: 265, and GOLD stage IV: 110) with chronic obstructive pulmonary disease (COPD) were included in the data analysis...
March 2017: Journal of Cardiopulmonary Rehabilitation and Prevention
https://www.readbyqxmd.com/read/28225205/greater-endurance-capacity-and-improved-dyspnoea-with-acute-oxygen-supplementation-in-idiopathic-pulmonary-fibrosis-patients-without-resting-hypoxaemia
#10
Leona M Dowman, Christine F McDonald, Steven Bozinovski, Ross Vlahos, Rebecca Gillies, Dodie Pouniotis, Catherine J Hill, Nicole S L Goh, Anne E Holland
BACKGROUND AND OBJECTIVE: Supplemental oxygen is commonly prescribed in patients with idiopathic pulmonary fibrosis (IPF), although its benefits have not been proven. The aims of this study were to investigate the effect of oxygen on oxidative stress, cytokine production, skeletal muscle metabolism and physiological response to exercise in IPF. METHODS: Eleven participants with IPF received either oxygen, at an FiO2 of 0.50, or compressed air for 1 h at rest and during a cycle endurance test at 85% of peak work rate...
February 22, 2017: Respirology: Official Journal of the Asian Pacific Society of Respirology
https://www.readbyqxmd.com/read/28224648/impacts-of-disease-severity-on-postoperative-complications-in-children-with-sleep-disordered-breathing
#11
Kun-Tai Kang, I-Sheng Chang, Chia-Chen Tseng, Wen-Chin Weng, Tzu-Yu Hsiao, Pei-Lin Lee, Wei-Chung Hsu
OBJECTIVES/HYPOTHESIS: To investigate the effects of diseases severity on postoperative complications following adenotonsillectomy (T&A) in children with sleep-disordered breathing (SDB). STUDY DESIGN: Retrospective study. METHODS: Children aged <18 years were enrolled and underwent T&A for treating SDB. Polysomnography was used to classify the disease severity: primary snoring (apnea-hypopnea index [AHI] <1), mild (AHI = 1-5), moderate (AHI = 5-10), and severe obstructive sleep apnea [OSA] (AHI ≥10)...
February 22, 2017: Laryngoscope
https://www.readbyqxmd.com/read/28223938/hypoxic-repeat-sprint-training-improves-rugby-player-s-repeated-sprint-but-not-endurance-performance
#12
Michael J Hamlin, Peter D Olsen, Helen C Marshall, Catherine A Lizamore, Catherine A Elliot
This study aims to investigate the performance changes in 19 well-trained male rugby players after repeat-sprint training (six sessions of four sets of 5 × 5 s sprints with 25 s and 5 min of active recovery between reps and sets, respectively) in either normobaric hypoxia (HYP; n = 9; FIO2 = 14.5%) or normobaric normoxia (NORM; n = 10; FIO2 = 20.9%). Three weeks after the intervention, 2 additional repeat-sprint training sessions in hypoxia (FIO2 = 14.5%) was investigated in both groups to gauge the efficacy of using "top-up" sessions for previously hypoxic-trained subjects and whether a small hypoxic dose would be beneficial for the previously normoxic-trained group...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28223786/factors-involved-in-the-discontinuation-of-oral-intake-in-elderly-patients-with-recurrent-aspiration-pneumonia-a-multicenter-study
#13
Tsuneaki Kenzaka, Taro Takeshima, Koki Kosami, Ayako Kumabe, Yuki Ueda, Takeshi Takahashi, Yuya Yamamoto, Yurika Hayashi, Akihito Kitao, Masanobu Okayama
PURPOSE: To assess the factors involved in oral intake discontinuation in elderly patients with recurrent aspiration pneumonia. PATIENTS AND METHODS: This study included patients with pneumonia who were treated at Jichi Medical University Hospital between 2007 and 2013, at Toyooka Public Hospital between 2011 and 2013 and at Yuzawa Community Medical Center between 2010 and 2012. We consecutively enrolled patients with aspiration pneumonia. The primary study point was oral intake discontinuation after the initiation of oral intake during hospitalization in cases of recurrent aspiration...
2017: Clinical Interventions in Aging
https://www.readbyqxmd.com/read/28222645/total-intravenous-anesthesia-produces-outcomes-superior-to-those-with-combined-intravenous-inhalation-anesthesia-for-laparoscopic-gynecological-surgery-at-high-altitude
#14
Rui Xu, Shuqin Zhou, Jin Yang, Haiyan Li, Qingguo Zhang, Guohong Zhang, Shiyuan Xu, Qing Peng
Objective We compared efficacy and adverse outcomes following totally intravenous anesthesia (TIVA) versus combined intravenous-inhalation anesthesia (CIVIA) on hemodynamics and postoperative recovery following laparoscopic gynecological (LG) surgery at high altitudes. Methods We enrolled 80 ASA I or II patients scheduled for LG surgery and randomly assigned them to TIVA with propofol (group P, n = 40) or CIVIA with isoflurane (group I, n = 40). Mean arterial pressure, heart rate, pulse oxygen saturation, and partial pressure of end-tidal carbon dioxide were measured at various time points...
February 2017: Journal of International Medical Research
https://www.readbyqxmd.com/read/28220508/quantitative-long-term-measurements-of-burns-in-a-rat-model-using-spatial-frequency-domain-imaging-sfdi-and-laser-speckle-imaging-lsi
#15
Adrien Ponticorvo, David M Burmeister, Rebecca Rowland, Melissa Baldado, Gordon T Kennedy, Rolf Saager, Nicole Bernal, Bernard Choi, Anthony J Durkin
BACKGROUND AND OJECTIVES: The current standard for diagnosis of burn severity and subsequent wound healing is through clinical examination, which is highly subjective. Several new technologies are shifting focus to burn care in an attempt to help quantify not only burn depth but also the progress of healing. While accurate early assessment of partial thickness burns is critical for dictating the course of treatment, the ability to quantitatively monitor wound status over time is critical for understanding treatment efficacy...
February 21, 2017: Lasers in Surgery and Medicine
https://www.readbyqxmd.com/read/28219612/hyperoxia-and-hypertonic-saline-in-patients-with-septic-shock-hypers2s-a-two-by-two-factorial-multicentre-randomised-clinical-trial
#16
Pierre Asfar, Frédérique Schortgen, Julie Boisramé-Helms, Julien Charpentier, Emmanuel Guérot, Bruno Megarbane, David Grimaldi, Fabien Grelon, Nadia Anguel, Sigismond Lasocki, Matthieu Henry-Lagarrigue, Frédéric Gonzalez, François Legay, Christophe Guitton, Maleka Schenck, Jean Marc Doise, Jérôme Devaquet, Thierry Van Der Linden, Delphine Chatellier, Jean Philippe Rigaud, Jean Dellamonica, Fabienne Tamion, Ferhat Meziani, Alain Mercat, Didier Dreyfuss, Valérie Seegers, Peter Radermacher
BACKGROUND: There is insufficient research into the use of mechanical ventilation with increased inspiratory oxygen concentration (FiO2) and fluid resuscitation with hypertonic saline solution in patients with septic shock. We tested whether these interventions are associated with reduced mortality. METHODS: This two-by-two factorial, multicentre, randomised, clinical trial (HYPERS2S) recruited patients aged 18 years and older with septic shock who were on mechanical ventilation from 22 centres in France...
February 14, 2017: Lancet Respiratory Medicine
https://www.readbyqxmd.com/read/28219430/digital-health-system-for-personalised-copd-long-term-management
#17
Carmelo Velardo, Syed Ahmar Shah, Oliver Gibson, Gari Clifford, Carl Heneghan, Heather Rutter, Andrew Farmer, Lionel Tarassenko
BACKGROUND: Recent telehealth studies have demonstrated minor impact on patients affected by long-term conditions. The use of technology does not guarantee the compliance required for sustained collection of high-quality symptom and physiological data. Remote monitoring alone is not sufficient for successful disease management. A patient-centred design approach is needed in order to allow the personalisation of interventions and encourage the completion of daily self-management tasks...
February 20, 2017: BMC Medical Informatics and Decision Making
https://www.readbyqxmd.com/read/28219167/-therapeutic-effectiveness-of-the-soft-palate-fold-surgery-in-patients-with-obstructive-sleep-apnea-hypopnea-syndrome
#18
M Zhu, X Bai
Objective: To evaluate the relationships between anatomical changes and treatment outcomes after modified velopharyngeal surgery in obstructive sleep apnea hypopnea syndrome (OSAHS) patients with the soft palate drooping. Methods: From November 2011 to November 2015, 44 OSHS patients (AHI 5-30 times/h) with the soft palate drooping determined by Muller test and drug-induced sleep endoscopy (DISE) were randomly selected. Treatment group included 23 patients who underwent modified velopharyngeal surgery, in which uvula was preserved and soft palate was shortened and advanced...
February 7, 2017: Zhonghua Er Bi Yan Hou Tou Jing Wai Ke za Zhi, Chinese Journal of Otorhinolaryngology Head and Neck Surgery
https://www.readbyqxmd.com/read/28218995/effects-of-rapid-vaccine-injection-without-aspiration-and-applying-manual-pressure-before-vaccination-on-pain-and-crying-time-in-infants
#19
İlknur Göl, Süheyla Altuğ Özsoy
AIM: To compare effects of rapid injection without aspiration and 10-second manual pressure before injection on pain severity and crying time in 4- to 6-month-old infants given the vaccine DTaP/IPV/Hib. METHODS: This is a randomized double-blind controlled study. The study population included all the infants presenting for DTaP/IPV/Hib to two family health centers between April and August in 2015. The study sample included 128 infants based on confidence interval of 95% and statistical power of 80%...
February 20, 2017: Worldviews on Evidence-based Nursing
https://www.readbyqxmd.com/read/28218533/water-table-dynamics-and-biogeochemical-cycling-in-a-shallow-variably-saturated-floodplain
#20
Steven B Yabusaki, Michael J Wilkins, Yilin Fang, Kenneth H Williams, Bhavna Arora, John R Bargar, Harry R Beller, Nicholas J Bouskill, Eoin L Brodie, John N Christensen, Mark E Conrad, Robert E Danczak, Eric King, Nicolas F Spycher, Carl I Steefel, Tetsu K Tokunaga, Roelof Jan Versteeg, Scott R Waichler, Haruko M Wainwright
Three-dimensional variably saturated flow and multicomponent biogeochemical reactive transport modeling, based on published and newly generated data, is used to better understand the interplay of hydrology, geochemistry, and biology controlling the cycling of carbon, nitrogen, oxygen, iron, sulfur, and uranium in a shallow floodplain. In this system, aerobic respiration generally maintains anoxic groundwater below an oxic vadose zone until seasonal snowmelt-driven water table peaking transports dissolved oxygen (DO) and nitrate from the vadose zone into the alluvial aquifer...
February 20, 2017: Environmental Science & Technology
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