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https://www.readbyqxmd.com/read/28436909/pulse-transit-time-measurement-using-seismocardiogram-photoplethysmogram-and-acoustic-recordings-evaluation-and-comparison
#1
Chenxi Yang, Negar Tavassolian
This work proposes a novel method of pulse transit time measurement. The proximal arterial location data is collected from seismocardiogram (SCG) recordings by placing a MEMS accelerometer on the chest wall. The distal arterial location data is recorded using an acoustic sensor placed inside the ear. The performance of distal location recordings is evaluated by comparing SCG-acoustic and SCG-Photoplethysmogram (PPG) measurements. PPG and acoustic performances under motion noise are also compared. Experimental results suggest comparable performances for the acoustic-based and PPG-based devices...
April 24, 2017: IEEE Journal of Biomedical and Health Informatics
https://www.readbyqxmd.com/read/28434857/a-study-evaluating-the-postprandial-plasma-glucose-control-among-type-2-diabetes-patients-attending-a-teaching-hospital-in-malaysia
#2
REVIEW
Salwa Selim Ibrahim Abougalambou, Nahid Osman Ahmed, Ayman S Abougalambou
BACKGROUND AND OBJECTIVE: Type 2 DM is rapidly rising as a global health care problem that threatens to reach pandemic levels by 2030. Type 2 diabetes mellitus is a disease with no cure and chronic disease that results in major morbidity and mortality. The main objective of this study is to evaluate postprandial plasma glucose level and to determine factors affect on postprandial plasma glucose level among type 2 diabetes outpatients attending endocrinology clinics at Hospital Universiti Sains Malaysia, Teaching Hospital...
April 10, 2017: Diabetes & Metabolic Syndrome
https://www.readbyqxmd.com/read/28433435/fabric-phase-sorptive-extraction-as-a-reliable-tool-for-rapid-screening-and-detection-of-freshness-markers-in-oranges
#3
M Aznar, S Úbeda, C Nerin, A Kabir, K G Furton
A simple, fast and sensitive analyte extraction method based on fabric phase sorptive extraction (FPSE) followed by gas chromatography-mass spectrometry (GC-MS) and ultra-performance liquid chromatography-quadrupole time of flight mass spectrometry (UPLC-QTOF-MS) analysis was developed for the analysis of 12 volatile compounds that represent most of the principal chemical families possessing different polarities and volatilities. Five FPSE media coated with different sol-gel sorbent chemistries having different polarities and selectivities were studied: long chain poly(dimethylsiloxane) (PDMS), short chain poly(tetrahydrofuran) (PTHF), Carbowax 20M (CW20M), short chain poly(dimethyl siloxane) (SC PDMS) and polyethylene glycol-polypropylene glycol-polyethylene glycol triblock copolymer (PEG-PPG-PEG)...
April 8, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28432748/future-challenges-and-therapeutic-opportunities-in-type-2-diabetes-changing-the-paradigm-of-current-therapy
#4
REVIEW
D R Owens, L Monnier, A H Barnett
Most algorithms for type 2 diabetes mellitus (T2DM) do not recommend treatment escalation until glycated haemoglobin (HbA1c) fails to reach the recommended target of 7% (53 mmol/mol) within approximately 3 months on any treatment regimen ('treat to failure'). Clinical inertia and/or poor adherence to therapy contribute to patients not reaching glycaemic targets when managed according to this paradigm. Clinical inertia exists across the entire spectrum of anti-diabetes therapies, although it is most pronounced when initiating and optimizing insulin therapy...
April 21, 2017: Diabetes, Obesity & Metabolism
https://www.readbyqxmd.com/read/28420086/blockwise-ppg-enhancement-based-on-time-variant-zero-phase-harmonic-notch-filtering
#5
Chanki Park, Hyunsoon Shin, Boreom Lee
So far, many approaches have been developed for motion artifact (MA) reduction from photoplethysmogram (PPG). Specifically, single-input MA reduction methods are useful to apply wearable and mobile healthcare systems because of their low hardware costs and simplicity. However, most of them are insufficiently developed to be used in real-world situations, and they suffer from a phase distortion problem. In this study, we propose a novel single-input MA reduction algorithm based on time-variant forward-backward harmonic notch filtering...
April 14, 2017: Sensors
https://www.readbyqxmd.com/read/28416494/long-term-clinical-course-of-normotensive-preperimetric-glaucoma
#6
Akira Sawada, Yusuke Manabe, Tetsuya Yamamoto, Chisato Nagata
AIMS: To evaluate the long-term clinical course of normotensive preperimetric glaucoma (PPG). METHODS: We retrospectively analysed 130 eyes of 130 patients initially diagnosed as having preperimetric normal tension glaucoma and followed these cases for at least 5 years with reliable visual field (VF) examinations by standard automated perimetry. When the VF defect (VFD) met Anderson-Patella's criteria on three or more consecutive examinations, and consistently met the criteria on subsequent examinations, we concluded that a glaucomatous VFD was present...
April 17, 2017: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/28408695/effect-of-exercise-timing-on-elevated-postprandial-glucose-levels
#7
Yoichi Hatamoto, Ryoma Goya, Yosuke Yamada, Eichi Yoshimura, Sena Nishimura, Yasuki Higaki, Hiroaki Tanaka
There is no consensus regarding optimal exercise timing for reducing post prandial glucose (PPG). The purpose of the present study was to determine the most effective exercise timing. Eleven participants completed four different exercise patterns 1) no exercise; 2) preprandial exercise (jogging); 3) postprandial exercise; and 4) brief periodic exercise intervention (3 sets of 1 min jogging + 30 s rest, every 30 min, 20 times total)] in a random order separated by a minimum of five days. Pre- and postprandial exercise consisted of 20 sets of intermittent exercise (1 min jogging + 30 s rest per set) repeated 3 times per day...
April 13, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28408352/characterization-and-spatiotemporal-expression-of-gonadotropin-releasing-hormone-in-the-pacific-abalone-haliotis-discus-hannai
#8
Tae Ha Kim, Mi Ae Kim, Kyeong Seop Kim, Jae Won Kim, Han Kyu Lim, Jung Sick Lee, Young Chang Sohn
Gonadotropin-releasing hormone (GnRH) is a key neuropeptide regulating reproduction in humans and other vertebrates. Recently, GnRH-like cDNAs and peptides were reported in marine mollusks, implying that GnRH-mediated reproduction is an ancient neuroendocrine system that arose prior to the divergence of protostomes and deuterostomes. Here, we evaluated the reproductive control system mediated by GnRH in the Pacific abalone Haliotis discus hannai. We cloned a prepro-GnRH cDNA (Hdh-GnRH) from the pleural-pedal ganglion (PPG) in H...
April 11, 2017: Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology
https://www.readbyqxmd.com/read/28398523/transitions-in-pregnancy-planning-in-women-recruited-for-a-large-prospective-cohort-study
#9
U Luderer, T Li, J P Fine, R F Hamman, J B Stanford, D Baker
STUDY QUESTION: Do the rates at which women transition among different intensities of pregnancy planning vary with age, marital status and race/ethnicity? SUMMARY ANSWER: Rates of transition from low or moderate pregnancy probability groups (PPGs) to higher PPGs vary by age, marital status and race/ethnicity. WHAT IS KNOWN ALREADY: The design of prospective studies of the effects of pre- and peri-conception exposures on fecundity, pregnancy and children's health is challenging because at any specific time only a small percentage of reproductive age women is attempting to conceive...
April 7, 2017: Human Reproduction
https://www.readbyqxmd.com/read/28394455/flexible-blade-coated-multicolor-polymer-light-emitting-diodes-for-optoelectronic-sensors
#10
Donggeon Han, Yasser Khan, Jonathan Ting, Simon M King, Nir Yaacobi-Gross, Martin J Humphries, Christopher J Newsome, Ana C Arias
A method to print two materials of different functionality during the same printing step is presented. In printed electronics, devices are built layer by layer and conventionally only one type of material is deposited in one pass. Here, the challenges involving printing of two emissive materials to form polymer light-emitting diodes (PLEDs) that emit light of different wavelengths without any significant changes in the device characteristics are described. The surface-energy-patterning technique is utilized to print materials in regions of interest...
April 10, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28391214/attacks-on-heartbeat-based-security-using-remote-photoplethysmography
#11
Robert M Seepers, Wenjin Wang, Gerard de Haan, Ioannis Sourdis, Christos Strydis
The time interval between consecutive heartbeats (interpulse interval, IPI) has previously been suggested for securing mobile-health (mHealth) solutions. This time interval is known to contain a degree of randomness, permitting the generation of a time- and person-specific identifier. It is commonly assumed that only devices trusted by a person can make physical contact with him/her, and that this physical contact allows each device to generate a similar identifier based on its own cardiac recordings. Under these conditions, the identifiers generated by different trusted devices can facilitate secure authentication...
April 5, 2017: IEEE Journal of Biomedical and Health Informatics
https://www.readbyqxmd.com/read/28386785/assessing-the-prognostic-features-of-a-pain-classification-system-in-advanced-cancer-patients
#12
Joseph Arthur, Kimberson Tanco, Ali Haider, Courtney Maligi, Minjeong Park, Diane Liu, Eduardo Bruera
PURPOSE: The Edmonton Classification System for Cancer Pain (ECS-CP) has been shown to predict pain management complexity based on five features: pain mechanism, incident pain, psychological distress, addictive behavior, and cognitive function. The main objective of our study was to explore the association between ECS-CP features and pain treatment outcomes among outpatients managed by a palliative care specialist-led interdisciplinary team. METHODS: Initial and follow-up clinical information of 386 eligible supportive care outpatients were retrospectively reviewed and analyzed...
April 6, 2017: Supportive Care in Cancer: Official Journal of the Multinational Association of Supportive Care in Cancer
https://www.readbyqxmd.com/read/28374317/infrared-multiple-photon-dissociation-action-spectroscopy-of-the-b2-ion-from-ppg-evidence-of-third-residue-affecting-b2-fragment-structure
#13
John C Poutsma, Jonathan Martens, Jos Oomens, Phillipe Maitre, Vincent Steinmetz, Matthew Bernier, Mengxuan Jia, Vicki Wysocki
Infrared multiple-photon dissociation (IRMPD) action spectroscopy was performed on the b2(+) fragment ion from the protonated PPG tripeptide. Comparison of the experimental infrared spectrum with computed spectra for both oxazolone and diketopiperazine structures indicates that the majority of the fragment ion population has an oxazolone structure with the remainder having a diketopiperazine structure. This result is in contrast with a recent study of the IRMPD action spectrum of the PP b2(+) fragment ion from PPP, which was found to be nearly 100% diketopiperazine (Martens et al...
April 3, 2017: Journal of the American Society for Mass Spectrometry
https://www.readbyqxmd.com/read/28371508/influence-of-mixed-electrolytes-on-the-adsorption-of-lysozyme-peg-and-pegylated-lysozyme-on-a-hydrophobic-interaction-chromatography-resin
#14
Eva Hackemann, Albert Werner, Hans Hasse
In a recent work(1) the influence of mixed electrolytes on the adsorption of the macromolecules lysozyme, PEG and di-PEGylated lysozyme on a hydrophobic resin has been studied, but only at one overall ionic strength (3000 mM). The present work, therefore, extends these studies to other ionic strengths (2400 mM and 2700 mM), and explores the application of a model to predict the entire data set. The adsorbent is Toyopearl PPG-600M. The solvent is a 25 mM aqueous sodium phosphate buffer at pH 7.0. The studied salts are sodium chloride, ammonium sulfate, sodium sulfate and ammonium chloride...
April 3, 2017: Biotechnology Progress
https://www.readbyqxmd.com/read/28368998/diagnostic-ability-of-wide-field-retinal-nerve-fiber-layer-maps-using-swept-source-optical-coherence-tomography-for-detection-of-preperimetric-and-early-perimetric-glaucoma
#15
Won June Lee, Kyeong Ik Na, Young Kook Kim, Jin Wook Jeoung, Ki Ho Park
PURPOSE: To evaluate the diagnostic ability of wide-field retinal nerve fiber layer (RNFL) maps with swept-source optical coherence tomography (SS-OCT) for detection of preperimetric (PPG) and early perimetric glaucoma (EG). METHODS: One hundred eighty-four eyes, including 67 healthy eyes, 43 eyes with PPG, and 74 eyes with EG, were analyzed. Patients underwent a comprehensive ocular examination including red-free RNFL photography, visual field testing and wide-field SS-OCT scanning (DRI-OCT-1 Atlantis; Topcon, Tokyo, Japan)...
March 31, 2017: Journal of Glaucoma
https://www.readbyqxmd.com/read/28367965/identification-of-atrial-fibrillation-by-quantitative-analyses-of-fingertip-photoplethysmogram
#16
Sung-Chun Tang, Pei-Wen Huang, Chi-Sheng Hung, Shih-Ming Shan, Yen-Hung Lin, Jiann-Shing Shieh, Dar-Ming Lai, An-Yeu Wu, Jiann-Shing Jeng
Atrial fibrillation (AF) detection is crucial for stroke prevention. We investigated the potential of quantitative analyses of photoplethysmogram (PPG) waveforms to identify AF. Continuous electrocardiogram (EKG) and fingertip PPG were recorded simultaneously in acute stroke patients (n = 666) admitted to an intensive care unit. Each EKG was visually labeled as AF (n = 150, 22.5%) or non-AF. Linear and nonlinear features from the pulse interval (PIN) and peak amplitude (AMP) of PPG waveforms were extracted from the first 1, 2, and 10 min of data...
April 3, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28361357/increasing-accuracy-of-pulse-transit-time-measurements-by-automated-elimination-of-distorted-photoplethysmography-waves
#17
Marit H N van Velzen, Arjo J Loeve, Sjoerd P Niehof, Egbert G Mik
Photoplethysmography (PPG) is a widely available non-invasive optical technique to visualize pressure pulse waves (PWs). Pulse transit time (PTT) is a physiological parameter that is often derived from calculations on ECG and PPG signals and is based on tightly defined characteristics of the PW shape. PPG signals are sensitive to artefacts. Coughing or movement of the subject can affect PW shapes that much that the PWs become unsuitable for further analysis. The aim of this study was to develop an algorithm that automatically and objectively eliminates unsuitable PWs...
March 30, 2017: Medical & Biological Engineering & Computing
https://www.readbyqxmd.com/read/28357611/development-of-visual-field-defect-after-first-detected-optic-disc-hemorrhage-in-preperimetric-open-angle-glaucoma
#18
Hae Jin Kim, Yong Ju Song, Young Kook Kim, Jin Wook Jeoung, Ki Ho Park
PURPOSE: To evaluate functional progression in preperimetric glaucoma (PPG) with disc hemorrhage (DH) and to determine the time interval between the first-detected DH and development of glaucomatous visual field (VF) defect. METHODS: A total of 87 patients who had been first diagnosed with PPG were enrolled. The medical records of PPG patients without DH (Group 1) and with DH (Group 2) were reviewed. When glaucomatous VF defect appeared, the time interval from the diagnosis of PPG to the development of VF defect was calculated and compared between the two groups...
March 29, 2017: Japanese Journal of Ophthalmology
https://www.readbyqxmd.com/read/28356319/fast-acting-insulin-aspart-improves-glycemic-control-in-basal-bolus-treatment-for-type-1-diabetes-results-of-a-26-week-multicenter-active-controlled-treat-to-target-randomized-parallel-group-trial-onset-1
#19
David Russell-Jones, Bruce W Bode, Christophe De Block, Edward Franek, Simon R Heller, Chantal Mathieu, Athena Philis-Tsimikas, Ludger Rose, Vincent C Woo, Anne Birk Østerskov, Tina Graungaard, Richard M Bergenstal
OBJECTIVE: This multicenter, treat-to-target, phase 3 trial evaluated the efficacy and safety of fast-acting insulin aspart (faster aspart) versus conventional insulin aspart (IAsp) in adults with type 1 diabetes. RESEARCH DESIGN AND METHODS: The primary end point was change from baseline in HbA1c after 26 weeks. After an 8-week run-in, subjects were randomized (1:1:1) to double-blind mealtime faster aspart (n = 381), IAsp (n = 380), or open-label postmeal faster aspart (n = 382)-each with insulin detemir...
March 29, 2017: Diabetes Care
https://www.readbyqxmd.com/read/28352083/novel-contactless-approach-for-assessment-of-venous-occlusion-plethysmography-by-video-recordings-at-the-green-illumination
#20
Alexei A Kamshilin, Valeriy V Zaytsev, Oleg V Mamontov
Occlusion plethysmography is an important method for assessment of the status of the cardiovascular system, which provides valuable information concerning arterial and venous blood flow, including mechanisms of their regulation. All up-to-date systems estimate change of the limb's volume during occlusion by contact-type sensors. The objective of the research is demonstration of feasibility of the novel approach to measuring the blood flow during venous occlusion by using imaging photoplethysmography (PPG). Twenty healthy individuals participated in the experiment...
March 28, 2017: Scientific Reports
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