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https://www.readbyqxmd.com/read/29793097/quantitative-assessment-of-placental-perfusion-by-three-dimensional-power-doppler-ultrasound-for-twins-with-selective-intrauterine-growth-restriction-in-one-twin
#1
Wei Sun, Jingyi Liu, Ying Zhang, Ailu Cai, Zeyu Yang, Yili Zhao, Yu Wang, Zhe Cao, Qiuju Wei
OBJECTIVE: We quantitatively assessed placental perfusion using three-dimensional (3D) power Doppler ultrasound for twins with selective intrauterine growth restriction (sIUGR) in one twin. STUDY DESIGN: A prospective cross-sectional study was performed for 104 normal monochorionic diamniotic twins and 30 twins with sIUGR. Twins with sIUGR were divided into two groups: in group I (19 twins), both fetuses had continuous forward end-diastolic blood flow in the umbilical artery; in group II (11 twins), the smaller fetus had a loss or a reverse end-diastolic blood flow in the umbilical artery, but the larger fetus had continuous forward end-diastolic blood flow...
May 17, 2018: European Journal of Obstetrics, Gynecology, and Reproductive Biology
https://www.readbyqxmd.com/read/29792312/identification-of-patients-with-hemoglobin-ss-s%C3%AE-0-thalassemia-disease-and-pain-crises-within-electronic-health-records
#2
Ashima Singh, Javier Mora, Julie A Panepinto
Electronic health records (EHRs) are a source of big data that provide opportunities for conducting population-based studies and creating learning health systems, especially for rare conditions such as sickle cell disease (SCD). The objective of our study is to validate algorithms for accurate identification of patients with hemoglobin (Hb) SS/Sβ0 thalassemia and acute care encounters for pain among SCD patients within EHR warehouse. We used data for children receiving care at Children's Hospital of Wisconsin from 2013 to 2016 to test the accuracy of the 2 algorithms...
June 12, 2018: Blood Advances
https://www.readbyqxmd.com/read/29792199/nanoparticle-delivery-of-grape-seed-derived-proanthocyanidins-to-airway-epithelial-cells-dampens-oxidative-stress-and-inflammation
#3
S Castellani, A Trapani, A Spagnoletta, L di Toma, T Magrone, S Di Gioia, D Mandracchia, G Trapani, E Jirillo, M Conese
BACKGROUND: Chronic respiratory diseases, whose one of the hallmarks is oxidative stress, are still incurable and need novel therapeutic tools and pharmaceutical agents. The phenolic compounds contained in grape are endowed with well-recognized anti-oxidant, anti-inflammatory, anti-cancer, and anti-aging activities. Considering that natural anti-oxidants, such as proanthocyanidins, have poor water solubility and oral bioavailability, we have developed a drug delivery system based on solid lipid nanoparticles (SLN), apt to encapsulate grape seed extract (GSE), containing proanthocyanidins...
May 23, 2018: Journal of Translational Medicine
https://www.readbyqxmd.com/read/29791899/national-practice-patterns-for-prenatal-monitoring-in-gastroschisis-gastroschisis-outcomes-of-delivery-good-provider-survey
#4
Ruchi Amin, Aaron Domack, Joseph Bartoletti, Erika Peterson, Britton Rink, Jennifer Bruggink, Melissa Christensen, Anthony Johnson, William Polzin, Amy J Wagner
BACKGROUND: Gastroschisis is an abdominal wall defect with increasing incidence. Given the lack of surveillance guidelines among maternal-fetal medicine (MFM) specialists, this study describes current practices in gastroschisis management. MATERIALS AND METHODS: An online survey was administered to MFM specialists from institutions affiliated with the North American Fetal Therapy Network (NAFTNet). Questions focused on surveillance timing, testing, findings that changed clinical management, and delivery plan...
May 23, 2018: Fetal Diagnosis and Therapy
https://www.readbyqxmd.com/read/29791795/surface-acoustic-wave-saw-driven-device-for-dynamic-cell-cultures
#5
Gina Greco, Matteo Agostini, Ilaria Tonazzini, Damiano Sallemi, Stefano Barone, Marco Cecchini
In the last decades new types of cell cultures have been introduced to provide better cell survival and development, and micro/nano-environmental physico-chemical conditions aimed to mimic those present in vivo. However, despite the efforts made, the systems available to date are often difficult to replicate and use. Here, an easy-to-use surface acoustic wave (SAW)-based platform is presented for realizing dynamic cell cultures that is compatible with standard optical microscopes, incubators and cell culture dishes...
May 23, 2018: Analytical Chemistry
https://www.readbyqxmd.com/read/29791515/comparison-of-oscillometric-doppler-and-invasive-blood-pressure-measurement-in-anesthetized-goats
#6
Olga Szaluś-Jordanow, Michał Czopowicz, Agata Moroz, Marcin Mickiewicz, Magdalena Garncarz, Emilia Bagnicka, Tadeusz Frymus, Jarosław Kaba
Arterial blood pressure (BP) can be measured directly using an invasive intra-arterial method. This method is considered a gold standard, however it is potentially hazardous and requires expensive equipment and professional skills. Therefore, two non-invasive methods-Doppler ultrasonic sphygmomanometry and oscillometry-have been introduced in veterinary medicine. Their accuracy has so far been reliably evaluated in various animal species, however only one study included a small group of goats. Therefore, we carried out a large-scale study which aimed to evaluate agreement between the two non-invasive methods and invasive intra-arterial BP measurement in anesthetized goats at various age...
2018: PloS One
https://www.readbyqxmd.com/read/29791356/linewidth-in-saturated-absorption-spectroscopy-for-two-level-atoms-an-empirical-formula
#7
Geol Moon, Heung-Ryoul Noh
We present an empirical formula for linewidth in saturated absorption spectroscopy for two-level atoms with cycling transition lines, taking the coherence term in the Doppler-broadened limit into account. The full width at half-maximum is obtained as (1+(1+as0 )b )γt , where s0 is the on-resonance saturation parameter, γt is the transverse decay rate, and a and b are the parameters that depend on γt . We find that as γt increases, a and b approach 1 and 1/2, respectively. These are the typical values in the case without the coherence term...
May 10, 2018: Applied Optics
https://www.readbyqxmd.com/read/29791320/modelling-the-cerebral-haemodynamic-response-in-the-physiological-range-of-paco-sub-2-sub
#8
Jatinder Singh Minhas, Ronney B Panerai, Thompson G Robinson
Objective
 Arterial CO<sub>2</sub> (PaCO<sub>2</sub>) has a strong effect on cerebral blood flow (CBF), but its influence on CBF regulatory mechanisms and circulatory systemic variables has not been fully described over the entire physiological range of PaCO<sub>2</sub>. 
 
 Approach
 CBF velocity (CBV, transcranial Doppler), blood pressure (BP, Finometer) and end-tidal CO<sub>2</sub> (EtCO<sub>2</sub>, capnography) were measured in 45 healthy volunteers (19 male, mean age 37...
May 23, 2018: Physiological Measurement
https://www.readbyqxmd.com/read/29790692/serum-concentrations-of-vegf-and-bfgf-in-the-course-of-propranolol-therapy-of-infantile-hemangioma-in-children-are-we-closer-to-understand-the-mechanism-of-action-of-propranolol-on-hemangiomas
#9
Lidia Babiak-Choroszczak, Kaja Giżewska-Kacprzak, Elżbieta Gawrych, Katarzyna Fischer, Anna Walecka, Lidia Puchalska-Niedbał, Justyna Rajewska-Majchrzak, Maciej Bagłaj
BACKGROUND: Propranolol has become the treatment of choice for infantile hemangiomas (IH). Neither the pathogenesis of IH nor the mechanism of action of propranolol on them are well understood. Possible explanations include the inhibition of angiogenesis by decreasing vascular endothelial growth factor (VEGF) and basic fibroblast growth factor (bFGF), induction of vascular endothelial cell apoptosis and vasoconstriction. OBJECTIVES: The aim of the study was to assess serum concentrations of VEGF and bFGF in the course of propranolol therapy of IH in children, and to assess their clinical implications...
May 16, 2018: Advances in Clinical and Experimental Medicine: Official Organ Wroclaw Medical University
https://www.readbyqxmd.com/read/29790611/anesthesia-effects-on-the-low-frequency-blood-flow-oscillations-in-mouse-skin
#10
M E Astashev, D A Serov, A V Tankanag
BACKGROUND: When laboratory animals are used one needs to anesthetize them before recording. However, the influence of anesthesia on animal blood flow oscillations has not been studied. The effects of two ways of anesthesia, zoletil-xylazine, and zoletil-nitrous oxide mixtures, on mouse skin perfusion using laser Doppler flowmetry (LDF) technique were studied. METHODS: BALB/c mice were used. LDF probe was placed on the ventral surface of the left hind paw. Spectral analysis of LDF signals was performed with continuous adaptive wavelet transform to identify and describe peripheral blood flow oscillations in mouse skin...
May 23, 2018: Skin Research and Technology
https://www.readbyqxmd.com/read/29790034/left-atrial-myocardial-dysfunction-after-chronic-abuse-of-anabolic-androgenic-steroids-a-speckle-tracking-echocardiography-analysis
#11
Antonello D'Andrea, Juri Radmilovic, Stefano Caselli, Andreina Carbone, Raffaella Scarafile, Simona Sperlongano, Gianpaolo Tocci, Tiziana Formisano, Francesca Martone, Biagio Liccardo, Michele D'Alto, Eduardo Bossone, Maurizio Galderisi, Paolo Golino
Anabolic-androgenic steroids (AAS) are used by power athletes to improve performance. However, the real effects of the chronic consumption of AAS on cardiovascular structures are subjects of intense debate. To detect by speckle tracking echocardiography (STE) underlying left atrial (LA) dysfunction in athletes abusing AAS and assess possible correlation between LA myocardial function and exercise capacity during cardiopulmonary stress test. 65 top-level competitive bodybuilders were selected (45 males), including 35 athletes misusing AAS for at least 5 years (users), 30 anabolic-free bodybuilders (non-users), compared to 40 age- and sex-matched healthy sedentary controls...
May 22, 2018: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/29789945/remote-monitoring-of-vibrational-information-in-spider-webs
#12
B Mortimer, A Soler, C R Siviour, F Vollrath
Spiders are fascinating model species to study information-acquisition strategies, with the web acting as an extension of the animal's body. Here, we compare the strategies of two orb-weaving spiders that acquire information through vibrations transmitted and filtered in the web. Whereas Araneus diadematus monitors web vibration directly on the web, Zygiella x-notata uses a signal thread to remotely monitor web vibration from a retreat, which gives added protection. We assess the implications of these two information-acquisition strategies on the quality of vibration information transfer, using laser Doppler vibrometry to measure vibrations of real webs and finite element analysis in computer models of webs...
May 22, 2018: Die Naturwissenschaften
https://www.readbyqxmd.com/read/29789915/a-potential-diagnostic-approach-for-foetal-long-qt-syndrome-developed-and-validated-in-children
#13
Arja Suzanne Vink, Irene M Kuipers, Rianne H A C M De Bruin-Bon, Arthur A M Wilde, Nico A Blom, Sally-Ann B Clur
In patients with Long-QT Syndrome (LQTS), mechanical abnormalities have been described. Recognition of these abnormalities could potentially be used in the diagnosis of LQTS, especially in the foetus where an ECG is not available and DNA-analysis is invasive. We aimed to develop and validate a marker for these mechanical abnormalities in children and to test its feasibility in foetuses as a proof of principle. We measured the myocardial contraction duration using colour Tissue Doppler Imaging (cTDI) in 41 LQTS children and age- and gender-matched controls...
May 22, 2018: Pediatric Cardiology
https://www.readbyqxmd.com/read/29789877/-meta-analyses-on-measurement-precision-of-non-invasive-hemodynamic-monitoring-technologies-in-adults
#14
G Pestel, K Fukui, M Higashi, I Schmidtmann, C Werner
An ideal non-invasive monitoring system should provide accurate and reproducible measurements of clinically relevant variables that enables clinicians to guide therapy accordingly. The monitor should be rapid, easy to use, readily available at the bedside, operator-independent, cost-effective and should have a minimal risk and side effect profile for patients. An example is the introduction of pulse oximetry, which has become established for non-invasive monitoring of oxygenation worldwide. A corresponding non-invasive monitoring of hemodynamics and perfusion could optimize the anesthesiological treatment to the needs in individual cases...
May 22, 2018: Der Anaesthesist
https://www.readbyqxmd.com/read/29789266/microvascular-volume-in-symptomatic-achilles-tendons-is-associated-with-visa-a-score
#15
S F E Praet, J H Ong, C Purdam, M Welvaert, G Lovell, L Dixon, J E Gaida, J Anglim, S Manzanero, N Vlahovich, D Hughes, G Waddington
OBJECTIVES: The role of neovascularisation in tendinopathy is still poorly understood, potentially due to technical limitations of conventional power Doppler ultrasound. This study aimed to investigate the association between contrast-enhanced ultrasound (CEUS) microvascular volume (MV), Victorian Institute of Sports Assessment-Achilles (VISA-A) scores and intrinsic Achilles tendon tenderness, as well as two different Power Doppler modes. DESIGN: Cross-sectional study...
May 15, 2018: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/29788686/augmented-reality-and-dynamic-infrared-thermography-for-perforator-mapping-in-the-anterolateral-thigh
#16
Ignacio Javier Cifuentes, Bruno Leonardo Dagnino, María Carolina Salisbury, María Eliana Perez, Claudia Ortega, Daniela Maldonado
Dynamic infrared thermography (DIRT) has been used for the preoperative mapping of cutaneous perforators. This technique has shown a positive correlation with intraoperative findings. Our aim was to evaluate the accuracy of perforator mapping with DIRT and augmented reality using a portable projector. For this purpose, three volunteers had both of their anterolateral thighs assessed for the presence and location of cutaneous perforators using DIRT. The obtained image of these "hotspots" was projected back onto the thigh and the presence of Doppler signals within a 10-cm diameter from the midpoint between the lateral patella and the anterior superior iliac spine was assessed using a handheld Doppler device...
May 2018: Archives of Plastic Surgery
https://www.readbyqxmd.com/read/29788476/the-flutter-by-effect-a-comprehensive-study-of-the-fluttering-cusps-of-the-perceval-heart-valve-prosthesis
#17
Ali Aljalloud, Mohamed Shoaib, Sandrine Egron, Jessica Arias, Lachmandath Tewarie, Heike Schnoering, Shahram Lotfi, Andreas Goetzenich, Nima Hatam, Desiree Pott, Zhaoyang Zhong, Ulrich Steinseifer, Rachad Zayat, Ruediger Autschbach
OBJECTIVES: Sutureless aortic valve prostheses are gaining popularity due to the substantial reduction in cross-clamp time. In this study, we report our observations on the cusp-fluttering phenomenon of the Perceval bioprosthesis (LivaNova, London, UK) using a combination of technical and medical perspectives. METHODS: Between August 2014 and December 2016, a total of 108 patients (69% women) with a mean age of 78 years had aortic valve replacement using the Perceval bioprosthesis (34 combined procedures)...
May 17, 2018: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/29788460/general-principles-for-pial-synangiosis-in-pediatric-moyamoya-patients-2-dimensional-operative-video
#18
David L Penn, Kyle C Wu, Kayla R Presswood, Coleman P Riordan, R Michael Scott, Edward R Smith
Pial synangiosis is a method of indirect surgical revascularization developed at our institution for the treatment of moyamoya disease in pediatric patients. Similar surgical principles are employed in adult cases, often performed because of lack of an adequate donor vessel. Standardized protocols, including preadmission for preoperative intravenous hydration and aspirin administration, as well as intraoperative electroencephalography, are routinely employed to minimize operative risk. Perioperative heparinization is not required...
May 18, 2018: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/29787569/association-between-il-6-production-in-synovial-explants-from-rheumatoid-arthritis-patients-and-clinical-and-imaging-response-to-biologic-treatment-a-pilot-study
#19
Martin Andersen, Mikael Boesen, Karen Ellegaard, Kalle Söderström, Niels H Søe, Pieter Spee, Ulrik G W Mørch, Søren Torp-Pedersen, Else M Bartels, Bente Danneskiold-Samsøe, Lars Karlsson, Henning Bliddal
INTRODUCTION: The need for biomarkers which can predict disease course and treatment response in rheumatoid arthritis (RA) is evident. We explored whether clinical and imaging responses to biologic disease modifying anti-rheumatic drug treatment (bDMARD) were associated with the individual's mediator production in explants obtained at baseline. METHODS: RA Patients were evaluated by disease activity score 28 joint C-reactive protein (DAS 28-)), colour Doppler ultrasound (CDUS) and 3 Tesla RA magnetic resonance imaging scores (RAMRIS)...
2018: PloS One
https://www.readbyqxmd.com/read/29787368/contemporary-surgical-outcomes-of-venous-tumour-thrombectomy-managed-with-intraoperative-doppler-ultrasound-for-kidney-cancer
#20
Deepak K Pruthi, Hanzhang Wang, Arpan Satsangi, Miguel Cajipe, Kevan Iffrig, Georges M Haidar, Taylor Hicks, Edward Y Sako, Michael A Liss, Wasim H Chowdhury, Ronald Rodriguez, Dharam Kaushik
INTRODUCTION: Radical nephrectomy (RN) with venous tumour thrombectomy (VTT) carries a significant morbidity and mortality risk. Examination of a contemporary single-institution series permits the development of a management algorithm and an audit its results. We report outcomes following the use of intraoperative colour Doppler ultrasound and our surgical pathway. METHODS: We retrospectively reviewed the records of all patients who underwent RN with VTT for kidney cancer between January 1, 2013 and October 1, 2016...
May 14, 2018: Canadian Urological Association Journal, Journal de L'Association des Urologues du Canada
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