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https://www.readbyqxmd.com/read/28325028/tracking-intrinsic-connectivity-brain-network-features-during-successive-pseudo-resting-states-and-interoceptive-task-fmri
#1
Behnaz Jarrahi, Dante Mantini
Advanced multivariate analyses of functional magnetic resonance imaging (fMRI) data based on blood oxygen level-dependent (BOLD) contras have revealed that the human brain organizes its activities into multiple intrinsic connectivity networks (ICNs). Several fMRI studies have evaluated the modulations of these networks during different cognitive or emotional tasks using blind source separation techniques particularly the independent component analysis (ICA). In this exploratory study, we applied ICA methodology to examine ICN modulations under different interoceptive conditions...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28324990/indirect-measurement-of-the-carotid-arterial-pressure-from-vibrocardiographic-signal-calibration-of-the-waveform-and-comparison-with-photoplethysmographic-signal
#2
L Casacanditella, G Cosoli, S Casaccia, E P Tomasini, L Scalise
The detection of arterial Blood Pressure waveform provides important information about the subject health status. Laser Doppler Vibrometry (LDV) is a non-contact technique with high sensitivity able to detect mechanical movements of the arterial wall; several previous studies have shown that LDV is able to characterize cardiac activity. Photoplethysmogram (PPG) quantifies the digital volume artery pulse, which has been demonstrated to be closely related to the pressure signal measured by an arterial tonometer...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28324943/overcoming-spatio-temporal-limitations-using-dynamically-scaled-in-vitro-pc-mri-a-flow-field-comparison-to-true-scale-computer-simulations-of-idealized-stented-and-patient-specific-left-main-bifurcations
#3
Susann Beier, John Ormiston, Mark Webster, John Cater, Stuart Norris, Pau Medrano-Gracia, Alistair Young, Kathleen Gilbert, Brett Cowan
The majority of patients with angina or heart failure have coronary artery disease. Left main bifurcations are particularly susceptible to pathological narrowing. Flow is a major factor of atheroma development, but limitations in imaging technology such as spatio-temporal resolution, signal-to-noise ratio (SNRv), and imaging artefacts prevent in vivo investigations. Computational fluid dynamics (CFD) modelling is a common numerical approach to study flow, but it requires a cautious and rigorous application for meaningful results...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28324935/photoplethysmography-towards-a-non-invasive-pressure-measurement-technique
#4
H Njoum, P A Kyriacou
There is a need for non-invasive and continuous blood pressure measurements. This study explored the relationship between Photoplethysmography (PPG) and Pressure-Volume (P-V) changes in an in vitro model. We proposed and compared methods for an estimation of the pulsatile volume, termed as Normalized Pulse Volume (NPV) and Adjusted Pulse Volume (APV). To validate the methods, pressure, Red (R) and InfraRed (IR) PPG signals were recorded continuously in an arterial model utilizing a pulsatile pump. Flow rates were controlled by varying pumping frequencies at low and high stroke volumes...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28324828/evaluation-of-dna-damage-and-physiological-responses-in-nile-tilapia-oreochromis-niloticus-linnaeus-1758-exposed-to-sub-lethal-diclofenac-dcf
#5
Pramod K Pandey, Malachy N O Ajima, Kundan Kumar, Nalini Poojary, Saurav Kumar
The frequent bioaccumulation of pharmaceuticals in the aquatic ecosystem has raised a concern about their possible ecotoxicological consequences. DNA damage, haematological changes and activities of oxidative stress enzymes in Nile tilapia, Oreochromis niloticus in response to diclofenac (DCF) exposure were investigated for up to 60 days at the concentrations of 0.17, 0.34 and 0.68mgL(-1) in the fish liver. Evaluation of genotoxic effects of the drug in the liver, using single-cell gel electrophoresis, showed DNA damage on exposure at the concentrations of 0...
March 8, 2017: Aquatic Toxicology
https://www.readbyqxmd.com/read/28324671/dose-de-escalation-of-intrapleural-tissue-plasminogen-activator-therapy-for-pleural-infection-the-adapt-project
#6
Natalia Popowicz, Oliver Bintcliffe, Duneesha De Fonseka, Kevin G Blyth, Nicola A Smith, Francesco Piccolo, Geoffrey Martin, Donny Wong, Anthony Edey, Nick Maskell, Y C Gary Lee
RATIONALE: Intrapleural therapy with a combination of tissue plasminogen activator (tPA) 10mg and deoxyribonuclease (DNase) 5mg administered twice daily has been shown in randomized and open-label studies to enable adequate drainage of over 90% of infected pleural effusions without surgery. Potential bleeding risks associated with intrapleural tPA and the drug costs remain important concerns. The ongoing ADAPT (Alteplase Dose Assessment for Pleural infection Therapy) project aims to investigate the efficacy and safety of dose de-escalation for intrapleural tPA...
March 21, 2017: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/28324340/quantitative-18-f-fluorocholine-positron-emission-tomography-for-prostate-cancer-correlation-between-kinetic-parameters-and-gleason-scoring
#7
Joshua J D Schaefferkoetter, Ziting Wang, Mary C Stephenson, Sharmili Roy, Maurizio Conti, Lars Eriksson, David W Townsend, Thomas Thamboo, Edmund Chiong
BACKGROUND: The use of radiolabeled choline as a positron emission tomography (PET) agent for imaging primary tumors in the prostate has been evaluated extensively over the past two decades. There are, however, conflicting reports of its sensitivity and the relationship between choline PET imaging and disease staging is not fully understood. Moreover, relatively few studies have investigated the correlation between tracer uptake and histological tumor grade. This work quantified (18)F-fluorocholine in tumor and healthy prostate tissue using pharmacokinetic modeling and stratified uptake parameters by histology grade...
December 2017: EJNMMI Research
https://www.readbyqxmd.com/read/28324159/hibernation-based-blood-loss-therapy-increases-survivability-of-lethal-hemorrhagic-shock-in-rats
#8
Cecilia E Perez de Lara Rodriguez, Lester R Drewes, Matthew T Andrews
A small-volume (1 ml/kg) resuscitation fluid based on metabolic adaptations in hibernating mammals was optimized using a rat model of hemorrhagic shock. A previous study of this therapy tested only one concentration of three specific components: 4 M D-stereoisomer of beta-hydroxybutyrate (BHB), 43 mM melatonin, and 20% DMSO. In this study, we considered the range of concentrations of BHB and melatonin seen during the physiological extremes of rapid arousal from hypothermic torpor in natural hibernators and applied these to the non-hibernating Sprague-Dawley rat model...
March 21, 2017: Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology
https://www.readbyqxmd.com/read/28323763/prospective-randomized-clinical-trial-investigating-the-effect-of-the-reamer-irrigator-aspirator-on-the-volume-of-embolic-load-and-respiratory-function-during-intramedullary-nailing-of-femoral-shaft-fractures
#9
Jeremy A Hall, Michael D McKee, Milena R Vicente, Zachary A Morison, Niloofar Dehghan, Christine E Schemitsch, Hans J Kreder, Brad Petrisor, Emil H Schemitsch
OBJECTIVES: We sought to determine whether the use of the Reamer-Irrigator-Aspirator (RIA) device resulted in a decreased amount of fat emboli compared with standard reaming (SR) when performing intramedullary (IM) nailing of femoral shaft fractures. DESIGN: Prospective randomized clinical trial. SETTING: Multi-centered trial, level I trauma centers. PATIENTS/PARTICIPANTS: All eligible patients who presented to participating institutions with an isolated femoral shaft fracture amenable to fixation with antegrade IM nailing...
April 2017: Journal of Orthopaedic Trauma
https://www.readbyqxmd.com/read/28320030/changes-in-regulatory-t-cell-levels-in-acute-cerebral-ischemia
#10
Xuerui Pang, Weidong Qian
Background Acute stroke causes intense and significant changes in the immune system as well as in the number and the ratio of various immune cells. Material and Methods Several large-scale studies have shown that ischemic stroke leaves the human body in a state of immunodepression. The regulatory T (Treg) cells may be strongly associated with a change of immune status. In this trial, we collected venous blood from a cohort of patients who were diagnosed with acute ischemic stroke within the last 24 hours (n = 139)...
March 20, 2017: Journal of Neurological Surgery. Part A, Central European Neurosurgery
https://www.readbyqxmd.com/read/28319822/comparison-of-intravenous-versus-topical-tranexamic-acid-in-primary-total-hip-and-knee-arthroplasty-an-updated-meta-analysis
#11
REVIEW
Jinwei Xie, Qinsheng Hu, Qiang Huang, Jun Ma, Yiting Lei, Fuxing Pei
BACKGROUND: The appropriate route for administering tranexamic acid in primary total hip (THA) and knee arthroplasty (TKA) remains controversial. The purpose of this meta-analysis was to compare the efficacy and safety of topical or intravenous tranexamic acid. METHODS: PubMed, EMBASE, and the Cochrane Library databases were systematically searched for randomized controlled trials (RCTs) comparing topical and intravenous tranexamic acid following primary THA or TKA...
March 10, 2017: Thrombosis Research
https://www.readbyqxmd.com/read/28319499/developmental-venous-anomalies-mimicking-neoplasm-on-11c-methionine-pet-and-dsc-perfusion-mri
#12
Julie H Harreld, Mikhail Doubrovin, Elizabeth R Butch, Angela Edwards, Barry Shulkin
Elevated relative cerebral blood volume on perfusion MRI and increased uptake on C-methionine PET can be used to diagnose and guide biopsy of brain tumors but are not specific. We report increased uptake on C-methionine PET associated with 4 developmental venous anomalies (DVAs) in 3 children with brain tumors, which could potentially mimic tumor and misdirect biopsy. Because DVAs are not readily visible on CT, prevention of misdirected biopsy in patients with focally elevated C-methionine uptake and relative cerebral blood volume relies on close correlation with contrast-enhanced anatomic MRI to exclude DVA or other nonneoplastic etiology...
March 17, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28319252/physiologic-reduction-of-hepatic-venous-blood-flow-by-the-valsalva-maneuver-decreases-liver-stiffness
#13
Selcan Ipek-Ugay, Heiko Tzschätzsch, Jürgen Braun, Thomas Fischer, Ingolf Sack
OBJECTIVES: Liver stiffness increases after intake of food or water, suggesting that hepatic venous blood flow affects the results of elastographic measurements. This study investigated the correlation between in vivo liver stiffness and hepatic blood flow using the Valsalva maneuver for reducing intrahepatic venous blood flow. METHODS: Intrahepatic changes in venous blood flow were assessed by sonography based on the pulsed wave Doppler velocity, vessel diameter assessment, and blood flow volume measurements in the portal vein and right hepatic vein...
March 20, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/28319189/lung-function-parameters-improve-prediction-of-vo2peak-in-an-elderly-population-the-generation-100-study
#14
Erlend Hassel, Dorthe Stensvold, Thomas Halvorsen, Ulrik Wisløff, Arnulf Langhammer, Sigurd Steinshamn
Peak oxygen uptake (VO2peak) is an indicator of cardiovascular health and a useful tool for risk stratification. Direct measurement of VO2peak is resource-demanding and may be contraindicated. There exist several non-exercise models to estimate VO2peak that utilize easily obtainable health parameters, but none of them includes lung function measures or hemoglobin concentrations. We aimed to test whether addition of these parameters could improve prediction of VO2peak compared to an established model that includes age, waist circumference, self-reported physical activity and resting heart rate...
2017: PloS One
https://www.readbyqxmd.com/read/28319139/identification-of-cell-morphology-parameters-from-automatic-hematology-analyzers-to-predict-the-peripheral-blood-cd34-positive-cell-count-after-mobilization
#15
Saeam Shin, Sung Ran Cho, Sinyoung Kim, Jong Rak Choi, Kyung-A Lee
Optimal timing of apheresis initiation is important for maximizing the hematopoietic stem cell (HSC) yield. This study aimed to identify useful parameters from automatic hematology analyzers for predicting the peripheral blood CD34+ cell count after mobilization. We prospectively enrolled 53 healthy donors and 72 patients, and evaluated 43 cell morphology parameters from Unicel DxH800 (Beckman Coulter, USA) and Advia 2120i (Siemens Healthcare Diagnostics, USA). The correlation of each parameter with the CD34+ cell count in pre-apheresis blood samples was analyzed...
2017: PloS One
https://www.readbyqxmd.com/read/28318591/reduction-of-mycobacterium-avium-ssp-paratuberculosis-in-colostrum-development-and-validation-of-2-methods-one-based-on-curdling-and-one-based-on-centrifugation
#16
M Verhegghe, G Rasschaert, L Herman, K Goossens, L Vandaele, K De Bleecker, G Vlaemynck, M Heyndrickx, J De Block
The aim of this study was to develop and validate 2 protocols (for use on-farm and at a central location) for the reduction of Mycobacterium avium ssp. paratuberculosis (MAP) in colostrum while preserving beneficial immunoglobulins (IgG). The on-farm protocol was based on curdling of the colostrum, where the IgG remain in the whey and the MAP bacteria are trapped in the curd. First, the colostrum was diluted with water (2 volumes colostrum to 1 volume water) and 2% rennet was added. After incubation (1 h at 32°C), the curd was cut and incubated again, after which whey and curd were separated using a cheesecloth...
March 16, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28318494/the-role-of-the-irreversible-electroporation-in-the-hepato-pancreatico-biliary-surgery
#17
Patricia Sánchez-Velázquez, Pierre-Alain Clavien
Irreversible electroporation is a novel technique growing in popularity over the last years among the ablative modalities. Its unique action mechanism produces irreversible nanopores in the membrane of the cell leading to apoptosis; therefore irreversible electroporation can be used to ablate substantial volumes of tissue without the undesirable thermal effects as the "heat sink effect". Moreover the extracellular matrix is left unperturbed, thus sparing the structural architecture of surrounding structures such as bile ducts and blood vessels...
March 16, 2017: Cirugía Española
https://www.readbyqxmd.com/read/28318382/physiologic-parameters-and-their-response-to-handling-stress-in-a-neotropical-migratory-shorebird-during-the-nonbreeding-season
#18
Verónica L D'Amico, María G Palacios, Allan J Baker, Patricia M González, Enrique Madrid, Marcelo Bertellotti
Physiologic traits are promising indicators of population health in the face of rapidly changing environments. We obtained values of diverse physiologic parameters for Two-banded Plovers (Charadrius falklandicus) in coastal sites in Patagonia, Argentina, with the objectives of determining the timeline in which these parameters become affected by the stress of capture and handling and of obtaining reference values for future monitoring of these populations. We analyzed packed cell volume, white blood cell profile, heterophil /lymphocyte ratio, bacterial agglutination titer, and total protein, glucose, triglyceride, and cholesterol levels in apparently healthy birds...
March 20, 2017: Journal of Wildlife Diseases
https://www.readbyqxmd.com/read/28318147/effects-of-alfapump-system-on-kidney-and-circulatory-function-in-patients-with-cirrhosis-and-refractory-ascites
#19
Elsa Solà, Santiago Sanchez-Cabús, Ezequiel Rodriguez, Chiara Elia, Raquel Cela, Rebeca Moreira, Elisa Pose, Jordi Sánchez-Delgado, Nuria Cañete, Manuel Morales-Ruiz, Francisco Campos, Jaume Balust, Mónica Guevara, Juan Carlos García-Valdecasas, Pere Ginès
The alfapump system has been proposed as a new treatment for the management of refractory ascites. The system removes ascites from the peritoneal cavity to urinary bladder, producing a continuous low-volume paracentesis. AIM: To investigate the effects of treatment with the alfapump system on kidney and circulatory function in patients with cirrhosis and refractory ascites. METHODS: Prospective study including 10 patients with cirrhosis and refractory ascites. Primary outcomes were changes in glomerular filtration rate (GFR), as assessed by isotopic techniques, and changes in circulatory function assessed by arterial pressure, cardiac output and activity of vasoconstrictor systems...
March 20, 2017: Liver Transplantation
https://www.readbyqxmd.com/read/28317658/minimally-invasive-pancreatoduodenectomy
#20
Michael L Kendrick, Jony van Hilst, Ugo Boggi, Thijs de Rooij, R Matthew Walsh, Herbert J Zeh, Steven J Hughes, Yoshiharu Nakamura, Charles M Vollmer, David A Kooby, Horacio J Asbun
BACKGROUND: Minimally invasive pancreatoduodenectomy (MIPD) is increasingly performed with several institutional series and comparative studies reported. The aim was to conduct an assessment of the best-evidence and expert opinion on the current status and future challenges of MIPD. METHODS: A systematic review of the literature was performed and best-evidence presented at a State-of-the-Art conference on Minimally Invasive Pancreatic Resection. Expert panel discussion and audience response activity was used to assess perceived value and future direction...
March 2017: HPB: the Official Journal of the International Hepato Pancreato Biliary Association
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