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Saturation monitoring

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https://www.readbyqxmd.com/read/27909604/effects-of-head-position-on-cerebral-oxygenation-and-blood-flow-velocity-during-thyroidectomy
#1
Ayten Saraçoğlu, Demet Altun, Ayşen Yavru, Nihat Aksakal, İsmail Cem Sormaz, Emre Camcı
OBJECTIVE: Determining the blood flow through intra and extra-cranial arteries during neck extension may be helpful but is a controversial issue. We aimed to elucidate the changes in cerebral blood flow related to head positioning during thyroid surgery by carotid Doppler examination and regional oxygen saturation variations. METHODS: Thirty patients were recruited to the study. Patients were positioned with a final position of thyroidectomy consisting a 30° semi Fowler with the extension of neck and head...
October 2016: Turkish Journal of Anaesthesiology and Reanimation
https://www.readbyqxmd.com/read/27898028/estimating-leaf-area-index-lai-in-vineyards-using-the-pocketlai-smart-app
#2
Francesca Orlando, Ermes Movedi, Davide Coduto, Simone Parisi, Lucio Brancadoro, Valentina Pagani, Tommaso Guarneri, Roberto Confalonieri
Estimating leaf area index (LAI) of Vitis vinifera using indirect methods involves some critical issues, related to its discontinuous and non-homogeneous canopy. This study evaluates the smart app PocketLAI and hemispherical photography in vineyards against destructive LAI measurements. Data were collected during six surveys in an experimental site characterized by a high level of heterogeneity among plants, allowing us to explore a wide range of LAI values. During the last survey, the possibility to combine remote sensing data and in-situ PocketLAI estimates (smart scouting) was evaluated...
November 26, 2016: Sensors
https://www.readbyqxmd.com/read/27897995/monitoring-of-physiological-parameters-to-predict-exacerbations-of-chronic-obstructive-pulmonary-disease-copd-a-systematic-review
#3
Ahmed M Al Rajeh, John R Hurst
INTRODUCTION: The value of monitoring physiological parameters to predict chronic obstructive pulmonary disease (COPD) exacerbations is controversial. A few studies have suggested benefit from domiciliary monitoring of vital signs, and/or lung function but there is no existing systematic review. OBJECTIVES: To conduct a systematic review of the effectiveness of monitoring physiological parameters to predict COPD exacerbation. METHODS: An electronic systematic search compliant with Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines was conducted...
November 25, 2016: Journal of Clinical Medicine
https://www.readbyqxmd.com/read/27896007/in-vivo-monitoring-of-tissue-oxygen-saturation-in-deep-brain-structures-using-a-single-fiber-optical-system
#4
Linhui Yu, Ying Wu, Jeff F Dunn, Kartikeya Murari
We propose a single fiber optical system for monitoring tissue oxygen saturation (sO2) based on continuous-wave reflectance spectroscopy in the visible wavelengths. The system is designed for measurements in deep brain structures by stereotaxically implanting the 200 μm-core fiber probe into the tissue of interest. Monte Carlo (MC) simulations were used to estimate the measurement tissue volume between 0.02-0.03 mm(3). Experiments in an optical phantom indicated the system had a root mean squared error (RMSE) of 4...
November 1, 2016: Biomedical Optics Express
https://www.readbyqxmd.com/read/27894918/laser-speckle-contrast-imaging-and-oxygen-to-see-for-assessing-microcirculatory-liver-blood-flow-changes-following-different-volumes-of-hepatectomy
#5
Chong Hui Li, Xin Lan Ge, Ke Pan, Peng Fei Wang, Yi Nan Su, Ai Qun Zhang
OBJECTIVE: Portal hyperperfusion after extended hepatectomy or small-for-size liver transplantation may induce organ dysfunction and failure. This study was designed to monitor and characterize the hepatic microcirculatory perfusion following different volumes of hepatectomy in rats by using laser speckle contrast image (LSCI) and Oxygen to See (O2C), a spectrometric device. METHODS: The microcirculatory liver blood flow of the rats that underwent 68%, 85% and 90% hepatectomy (68PH, 85PH and 90PH) was monitored with LSCI and O2C before and following the hepatectomy...
November 25, 2016: Microvascular Research
https://www.readbyqxmd.com/read/27894154/perfusion-controlled-mobilization-after-lower-extremity-free-flaps-pushing-the-limits-of-time-and-intensity
#6
Ulf Dornseifer, Charlotte Kleeberger, Lukas Kargl, Markus Schönberger, Daniel Rohde, Milomir Ninkovic, Arndt Schilling
Background The current standard to gradually adapt the fragile perfusion in lower extremity free flaps to an upright posture is the dangling maneuver. This type of flap training neither fits the orthostatic target load of an upright posture, nor does it assist in mobilizing the patients effectively. In this study, we quantitatively analyzed training effects of an early and full mobilization on flap perfusion. Methods A total of 15 patients with gracilis flaps for distal lower extremity reconstruction were included...
November 28, 2016: Journal of Reconstructive Microsurgery
https://www.readbyqxmd.com/read/27893739/evaluating-carbonate-system-algorithms-in-a-nearshore-system-does-total-alkalinity-matter
#7
Jonathan M Jones, Julia Sweet, Mark A Brzezinski, Heather M McNair, Uta Passow
Ocean acidification is a threat to many marine organisms, especially those that use calcium carbonate to form their shells and skeletons. The ability to accurately measure the carbonate system is the first step in characterizing the drivers behind this threat. Due to logistical realities, regular carbonate system sampling is not possible in many nearshore ocean habitats, particularly in remote, difficult-to-access locations. The ability to autonomously measure the carbonate system in situ relieves many of the logistical challenges; however, it is not always possible to measure the two required carbonate parameters autonomously...
2016: PloS One
https://www.readbyqxmd.com/read/27888307/monitoring-doxorubicin-cellular-uptake-and-trafficking-using-in-vitro-raman-microspectroscopy-short-and-long-time-exposure-effects-on-lung-cancer-cell-lines
#8
Zeineb Farhane, Franck Bonnier, Hugh J Byrne
Raman microspectroscopy is a non-invasive, in vitro analytical tool which is being increasingly explored for its potential in clinical applications and monitoring the uptake, mechanism of action and cellular interaction at a molecular level of chemotherapeutic drugs, ultimately as a potential label-free preclinical screening and companion diagnostic tool. In this study, doxorubicin (DOX), a "gold standard" chemotherapeutic drug, is employed as a model in the in vitro lung cancer cell line A549 in order to demonstrate the potential of Raman microspectroscopy to screen and identify spectroscopic markers of its trafficking and mechanism of action...
November 25, 2016: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/27886367/tissue-ischemia-worsens-during-hemodialysis-in-end-stage-renal-disease-patients
#9
Jan Malik, Jaroslav Kudlicka, Jana Lachmanova, Anna Valerianova, Katarina Rocinova, Magdalena Bartkova, Vladimir Tesar
BACKGROUND: Cognitive deficit is a common problem in end-stage renal disease (ESRD) patients. Ultrafiltration and hemodialysis lead to profound hemodynamic changes. The aim of this pilot study was to describe brain and hand oxygenation values in ESRD patients and their changes during hemodialysis. METHODS: Twenty-seven patients treated by chronic hemodialysis and 17 controls patients of the same age were included in the study. Regional saturation of oxygen (SrO2) was measured at the brain frontal lobe and at the hand with dialysis access using the INVOS 5100C...
November 22, 2016: Journal of Vascular Access
https://www.readbyqxmd.com/read/27882881/the-mechanism-of-alkene-elimination-from-protonated-toluenesulphonamides-generated-by-electrospray-ionisation
#10
Amie Saidykhan, Jenessa Ebert, William H C Martin, Richard T Gallagher, Richard D Bowen
The positive ion electrospray mass spectra of a range of sulphonamides of general structure CH3C6H4SO2NHR1 [R1 = CnH2n(+1) (n = 1-7), CnH2n-1 (n = 3, 4), C6H5, C6H5CH2 and C6H5CH(CH3)] and CH3C6H4SO2NR1R(2) [R(1), R(2) = CnH2n+1 (n = 1-8)] are reported and discussed. The protonated sulphonamides derived from saturated primary and secondary aliphatic amines generally fragment to only a limited extent unless energised by collision. Two general fragmentations are observed: firstly, elimination of an alkene, CnH2n, obtained by hydrogen abstraction from one of the CnH2n+1 alkyl groups on nitrogen; secondly, cleavage to form CH3C6H4SO2+...
2016: European Journal of Mass Spectrometry
https://www.readbyqxmd.com/read/27882094/the-protective-and-hemodynamic-effects-of-dexmedetomidine-on-hypertensive-cerebral-hemorrhage-patients-in-the-perioperative-period
#11
Junhui Zhao, Chuixian Zhou
The aim of the present study was to analyze the protective and hemodynamic effects of dexmedetomidine in hypertensive cerebral hemorrhage (HCH) patients during perioperative period. In total, 50 HCH patients were selected and randomly divided into two groups, one group was administered with dexmedetomidine and the other groups with midazolam. The mean arterial pressure (MAP), heart rate (HR) and blood oxygen saturation (SpO2) were monitored in the two groups of patients before and during the operation. The MAP, HR, SpO2 and PETCO2 recorded 5 min after admission into the operation room was considered T1, the same parameters recorded 10 min after drug administration were considered T2, just after starting the operation were considered T3 and 30 min after start of operation were considered T4...
November 2016: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/27877133/decomposition-of-near-infrared-spectroscopy-signals-using-oblique-subspace-projections-applications-in-brain-hemodynamic-monitoring
#12
Alexander Caicedo, Carolina Varon, Borbala Hunyadi, Maria Papademetriou, Ilias Tachtsidis, Sabine Van Huffel
Clinical data is comprised by a large number of synchronously collected biomedical signals that are measured at different locations. Deciphering the interrelationships of these signals can yield important information about their dependence providing some useful clinical diagnostic data. For instance, by computing the coupling between Near-Infrared Spectroscopy signals (NIRS) and systemic variables the status of the hemodynamic regulation mechanisms can be assessed. In this paper we introduce an algorithm for the decomposition of NIRS signals into additive components...
2016: Frontiers in Physiology
https://www.readbyqxmd.com/read/27872834/factors-associating-with-oxygenation-of-lower-limb-muscle-tissue-in-hemodialysis-patients
#13
Haruhisa Miyazawa, Susumu Ookawara, Kiyonori Ito, Katsunori Yanai, Hiroki Ishii, Taisuke Kitano, Mitsutoshi Shindo, Yuichiro Ueda, Yoshio Kaku, Keiji Hirai, Taro Hoshino, Kaoru Tabei, Yoshiyuki Morishita
AIM: To evaluate the lower-limb muscle oxygenation in hemodialysis (HD) patients and identify the factors associating with muscle oxygenation. METHODS: Sixty-seven HD patients (53 men and 14 women; mean age, 67.1 ± 1.2 years; mean HD duration, 5.6 ± 0.9 years) were recruited. In addition, 15 healthy individuals (nine men and six women; mean age, 38.2 ± 4.6 years) were recruited as the control group. Lower-limb muscle regional saturation of oxygen (rSO2) was monitored on the lateral side of the gastrocnemius muscle before HD using an INVOS 5100C (Covidien Japan, Tokyo, Japan), which utilizes near-infrared spectroscopy...
November 6, 2016: World Journal of Nephrology
https://www.readbyqxmd.com/read/27867722/feasibility-of-spatial-frequency-domain-imaging-sfdi-for-optically-characterizing-a-preclinical-oncology-model
#14
Syeda Tabassum, Yanyu Zhao, Raeef Istfan, Junjie Wu, David J Waxman, Darren Roblyer
Determination of chemotherapy efficacy early during treatment would provide more opportunities for physicians to alter and adapt treatment plans. Diffuse optical technologies may be ideally suited to track early biological events following chemotherapy administration due to low cost and high information content. We evaluated the use of spatial frequency domain imaging (SFDI) to characterize a small animal tumor model in order to move towards the goal of endogenous optical monitoring of cancer therapy in a controlled preclinical setting...
October 1, 2016: Biomedical Optics Express
https://www.readbyqxmd.com/read/27867697/joint-blood-flow-is-more-sensitive-to-inflammatory-arthritis-than-oxyhemoglobin-deoxyhemoglobin-and-oxygen-saturation
#15
Ajay Rajaram, Seva Ioussoufovitch, Laura B Morrison, Keith St Lawrence, Ting-Yim Lee, Yves Bureau, Mamadou Diop
Joint hypoxia plays a central role in the progression and perpetuation of rheumatoid arthritis (RA). Thus, optical techniques that can measure surrogate markers of hypoxia such as blood flow, oxyhemoglobin, deoxyhemoglobin, and oxygen saturation are being developed to monitor RA. The purpose of the current study was to compare the sensitivity of these physiological parameters to arthritis. Experiments were conducted in a rabbit model of RA and the results revealed that joint blood flow was the most sensitive to arthritis and could detect a statistically significant difference (p<0...
October 1, 2016: Biomedical Optics Express
https://www.readbyqxmd.com/read/27859989/effects-of-high-resolution-esophageal-manometry-on-oxygen-saturation-and-hemodynamic-function
#16
Vicente Ortiz, Esteban Sáez-González, Michel Blé, Francia Carolina Díaz-Jaime, Carmen Vinaixa, Vicente Garrigues
The effect of high-resolution esophageal manometry (HRM) on oxygen saturation (SaO2 ) and hemodynamic function has not been previously evaluated. This was a prospective study of consecutive patients referred for HRM. Demographic and clinical data were collected on all patients. The study variables included SaO2 , heart rate (HR) and blood pressure (BP). SaO2 and HR were measured at baseline, during intubation, during and 5 min after HRM. BP was measured at baseline, during and after HRM. 158 (56% women) patients with a mean age of 56 (SD 15) years were included...
November 9, 2016: Diseases of the Esophagus: Official Journal of the International Society for Diseases of the Esophagus
https://www.readbyqxmd.com/read/27859838/aggregation-induced-changes-in-the-chemical-exchange-saturation-transfer-cest-signals-of-proteins
#17
Steffen Goerke, Katharina S Milde, Raul Bukowiecki, Patrick Kunz, Karel D Klika, Thomas Wiglenda, Axel Mogk, Erich E Wanker, Bernd Bukau, Mark E Ladd, Peter Bachert, Moritz Zaiss
Chemical exchange saturation transfer (CEST) is an MRI technique that allows mapping of biomolecules (small metabolites, proteins) with nearly the sensitivity of conventional water proton MRI. In living organisms, several tissue-specific CEST effects have been observed and successfully applied to diagnostic imaging. In these studies, particularly the signals of proteins showed a distinct correlation with pathological changes. However, as CEST effects depend on various properties that determine and affect the chemical exchange processes, the origins of the observed signal changes remain to be understood...
November 11, 2016: NMR in Biomedicine
https://www.readbyqxmd.com/read/27855748/ambulatory-blood-pressure-monitoring-in-chinese-obstructive-sleep-apnea-patients
#18
Yan Ma, Shuchen Sun, Chung-Kang Peng, Yeming Fang, Robert J Thomas
STUDY OBJECTIVES: Nocturnal blood pressure (BP) dipping in patients with obstructive sleep apnea (OSA) has not yet been well investigated in Chinese patients, in whom the relationship of OSA and body mass index (BMI) is weaker than that in Caucasians. The aim of this study was to evaluate the BP profile, and the relationships between nocturnal BP and the severity of OSA, in Chinese patients. METHODS: Consecutive Chinese adult outpatients with suspected OSA had overnight polysomnography (PSG), office BP, and 24-h ambulatory BP monitoring (ABPM)...
November 14, 2016: Journal of Clinical Sleep Medicine: JCSM: Official Publication of the American Academy of Sleep Medicine
https://www.readbyqxmd.com/read/27852427/monitoring-the-hospital-management-of-acute-asthma-the-italian-pediatric-network-experience
#19
A G Martelli, R Bianchi, B Boldrighini, M Bosoni, A De Vuono, A Flores D'Arcais, G Gargantini, R Longhi, M T Ortisi, E Racchi, L Parola
BACKGROUND: The Study Group on Accreditation and Quality Improvement of the Italian Society of Pediatrics has developed an observational study about the hospital management of pediatric patients affected by severe asthma, in order to evaluate how the Guidelines for severe asthma in childhood are applied in the daily practice. METHODS: This study included patients between 2 and 17 years, hospitalized or under short intensive observation for acute asthma. The data collection was carried out through the compilation of on-line forms...
November 2016: European Annals of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/27847275/preparation-and-tableting-of-long-term-stable-amorphous-rutin-using-porous-silica
#20
Qionghua Wei, Cornelia M Keck, Rainer H Müller
Amorphous state of drugs increases the oral bioavailability, but typically faces physical stability problems. Amorphous rutin was generated and physically stabilized by encapsulating inside mesopores of porous AEROPERL® 300 Pharma and named as rutin CapsMorph® in this study. AEROPERL® 300 Pharma was loaded with rutin dissolved in DMSO containing Tween 80, and subsequently the solvent evaporated (wetness impregnation method). The loading process was monitored by light microscopy and scanning electron microscopy (SEM)...
November 12, 2016: European Journal of Pharmaceutics and Biopharmaceutics
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