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https://www.readbyqxmd.com/read/28913988/prevalence-of-respiratory-viral-infections-in-korean-adult-asthmatics-with-acute-exacerbations-comparison-with-those-with-stable-state
#1
Ki Hyun Seo, Da Jeong Bae, Ji Na Kim, Ho Sung Lee, Yong Hoon Kim, Jong Sook Park, Myung Shin Kim, Hun Soo Chang, Ji Hye Son, Dong Gyu Baek, Jun Suk Lee, Choon Sik Park
PURPOSE: Viral infections are involved in ~50% of exacerbations among Caucasian adult asthmatics. However, there have been few reports on the causative virus of exacerbations in Korean adult asthmatics. Thus, we compared frequencies and types of viruses between lower respiratory tract illnesses (LRTIs) with exacerbations (exacerbated LRTIs) and those without exacerbations (stable LRTIs) to evaluate contribution of respiratory viruses to exacerbations. METHODS: Viral RNA was extracted from sputum using the Viral Gene-spin™ Kit...
November 2017: Allergy, Asthma & Immunology Research
https://www.readbyqxmd.com/read/28910397/a-three-dimensional-strain-measurement-method-in-elastic-transparent-materials-using-tomographic-particle-image-velocimetry
#2
Azuma Takahashi, Sara Suzuki, Yusuke Aoyama, Mitsuo Umezu, Kiyotaka Iwasaki
BACKGROUND: The mechanical interaction between blood vessels and medical devices can induce strains in these vessels. Measuring and understanding these strains is necessary to identify the causes of vascular complications. This study develops a method to measure the three-dimensional (3D) distribution of strain using tomographic particle image velocimetry (Tomo-PIV) and compares the measurement accuracy with the gauge strain in tensile tests. METHODS AND FINDINGS: The test system for measuring 3D strain distribution consists of two cameras, a laser, a universal testing machine, an acrylic chamber with a glycerol water solution for adjusting the refractive index with the silicone, and dumbbell-shaped specimens mixed with fluorescent tracer particles...
2017: PloS One
https://www.readbyqxmd.com/read/28890680/study-of-flow-behaviors-of-droplet-merging-and-splitting-in-microchannels-using-micro-piv-measurement
#3
Feng Shen, Yi Li, Zhaomiao Liu, XiuJun Li
Droplet merging and splitting are important droplet manipulations in droplet-based microfluidics. However, the fundamental flow behaviors of droplets were not systematically studied. Hence, we designed two different microstructures to achieve droplet merging and splitting respectively, and quantitatively compared different flow dynamics in different microstructures for droplet merging and splitting via micro-particle image velocimetry (micro-PIV) experiments. Some flow phenomena of droplets different from previous studies were observed during merging and splitting using a high-speed microscope...
April 2017: Microfluidics and Nanofluidics
https://www.readbyqxmd.com/read/28868996/comparison-of-the-luminex-nxtag-respiratory-pathogen-panel-and-a-multiplex-in-house-real-time-pcr-panel-for-the-detection-of-respiratory-viruses-in-symptomatic-patients
#4
Andrew David Sails, Gary Eltringham, Manoj Valappil, Sheila Waugh, David Saunders
PURPOSE: To evaluate the Luminex NxTAG respiratory pathogen panel (NxTAG RPP) for the detection of respiratory viruses in clinical samples from patients with the symptoms of respiratory infection. METHODOLOGY: The NxTAG RPP was compared to an in-house multiplex real-time PCR panel (LDT) for the detection of respiratory viruses in 314 clinical samples from patients with the symptoms of respiratory infection. RESULTS: Thirty-one samples were negative in both tests and 193 samples contained a single virus that was detected in both tests...
September 4, 2017: Journal of Medical Microbiology
https://www.readbyqxmd.com/read/28859929/cutaneous-and-renal-vasodilatory-response-to-local-pressure-application-a-comparative-study-in-mice
#5
Anne-Laure Begey, Kiao Ling Liu, Ming Lo, Audrey Josset-Lamaugarny, Nicolas Picard, Catherine Gauthier, Berengere Fromy, Dominique Sigaudo-Roussel, Laurence Dubourg
BACKGROUND AND AIM: We have reported a novel relationship involving mechanical stimulation and vasodilation in rodent and human skin, referred to as pressure-induced vasodilation (PIV). It is unknown whether this mechanism exists in kidney and reflects the microcirculation in deep organs. Therefore, we compared the skin and kidney PIV to determine whether their changes were similar. METHODS: In anesthetized mice fed a normal salt-diet, laser Doppler flux (LDF) signals were measured when an increase in local pressure was applied to the surface of the head skin with the rate of 2...
August 30, 2017: Microvascular Research
https://www.readbyqxmd.com/read/28844907/effect-of-different-stent-configurations-using-lattice-boltzmann-method-and-particles-image-velocimetry-on-artery-bifurcation-aneurysm-problem
#6
N Hafizah Mokhtar, Aizat Abas, N A Razak, Muhammad Najib Abdul Hamid, Soon Lay Teong
Proper design of stent for application at specific aneurysm effect arteries could help to reduce the issues with thrombosis and aneurysm. In this paper, four types of stent configuration namely half-Y (6 mm), half-Y (4 mm), cross-bar, and full-Y configuration will implanted on real 3D artery bifurcation aneurysm effected arteries. Comparisons were then conducted based on the flow patterns after stent placement using both LBM-based solver and PIV experimental findings. According to the data obtained from all 4 stent designs, the flow profiles and the computed velocity from both methods were in agreement with each other...
August 24, 2017: Journal of Theoretical Biology
https://www.readbyqxmd.com/read/28822432/-clinical-analysis-of-children-with-pertussis-and-significance-of-respiratory-virus-detection-in-the-combined-diagnosis
#7
H Huang, L Deng, F Xiao, J Fu, J Deng, F Wang, J Yang
Objective: To analyze the clinical data of children with pertussis and explore the necessity of respiratory virus detection in the combined diagnosis so as to improve the clinician's understanding and standardize the diagnosis and treatment of pertussis in children. Method: Clinical data and laboratory examination of 195 suspected pertussis children between Jan. 2015 and Dec. 2016 in Children's Hospital Affiliated to Capital Institute of Pediatric were analyzed retrospectively. Result: The nasopharyngeal secretions were collected from 195 suspected pertussis children, PCR was employed to detect the nucleic acid of Bordetella pertussis...
August 2, 2017: Zhonghua Er Ke za Zhi. Chinese Journal of Pediatrics
https://www.readbyqxmd.com/read/28802868/development-and-implementation-of-an-ultrasound-guided-peripheral-intravenous-catheter-program-for-emergency-nurses
#8
Courtney Edwards, Jodi Jones
PROBLEM: Emergency medical care often necessitates placement of peripheral intravenous (PIV) catheters. When traditional methods for obtaining PIV access are not successful, ultrasound guidance is a rescue technique for peripheral vascular placement that improves the quality of patient care. METHODS: The aim of this training program was to develop a process where emergency nurses would be competent to perform ultrasound guided PIV to improve the quality of patient care delivered while reducing throughput time...
August 9, 2017: Journal of Emergency Nursing: JEN: Official Publication of the Emergency Department Nurses Association
https://www.readbyqxmd.com/read/28794685/a-posteriori-accuracy-estimation-of-ultrasonic-vector-flow-mapping-vfm
#9
Tomohiko Tanaka, Rei Asami, Ken-Ichi Kawabata, Kunio Hashiba, Takashi Okada, Tomohide Nishiyama
ABSTRACT: A novel method, called a posteriori "VFM accuracy estimation" (VAE), for resolving an intrinsic VFM problem is proposed. The problem is that VFM uncertainty can easily vary according to blood flows through an echocardiographic imaged plane (i.e., "through-plane" flows), and it is unknown. Knowing the VFM uncertainty for each patient will make it possible to refine the quality of VFM-based diagnosis. In the present study, VAE was derived on the basis of an error-propagation analysis and a statistical analysis...
2017: Journal of Visualization
https://www.readbyqxmd.com/read/28782404/does-first-trimester-nuchal-cord-affect-the-blood-flow-in-the-ductus-venosus-a-prospective-observational-study
#10
S Petousis, C Margioula-Siarkou, A Mamopoulos, A Sotiriadis, D Rousso, A Athanasiadis, T Dagklis
INTRODUCTION: Main objective of the present study was to investigate the association between the presence of nuchal cord (NC) and the measurement of the ductus venosus pulsatility index for veins. (Ductus venosus (DV) PIV) Methods: This was a prospective study of 1974 singleton pregnancies that underwent first trimester screening at 11-13 + 6 gestational weeks. Colour Doppler was used to demonstrate the presence of a NC in all cases and the DV PIV was calculated routinely, as part of the standard scan...
August 7, 2017: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/28759423/point-of-care-ultrasound-as-an-adjunct-in-the-diagnosis-of-neonatal-and-pediatric-superficial-soft-tissue-infection-a-report-of-two-cases
#11
Dalibor Kurepa, Colleen Galiczewski, Alison Civale, Vitaliya Boyar
Considerable technological advances, good safety profile, and ease of use have converged to support the use of ultrasound (US) as an important adjunct in the evaluation of superficial soft tissue infections (SSTI) in general and the differential diagnosis of cellulitis and abscess in particular. However, its use in neonatal populations has not been described. Pediatric studies report clinical examination is not always a reliable method of distinguishing cellulitis from abscess. Two (2) case reports are presented to supplement the growing body of published data that describe US imaging of SSTIs...
July 2017: Ostomy/wound Management
https://www.readbyqxmd.com/read/28755660/computational-and-experimental-assessment-of-influences-of-hemodynamic-shear-stress-on-carotid-plaque
#12
Hui Zhou, Long Meng, Wei Zhou, Lin Xin, Xiangxiang Xia, Shuai Li, Hairong Zheng, Lili Niu
BACKGROUND: Studies have identified hemodynamic shear stress as an important determinant of endothelial function and atherosclerosis. In this study, we assess the influences of hemodynamic shear stress on carotid plaques. METHODS: Carotid stenosis phantoms with three severity (30, 50, 70%) were made from 10% polyvinyl alcohol (PVA) cryogel. The phantoms were placed in a pulsatile flow loop with the same systolic/diastolic phase (35/65) and inlet flow rate (16 L/h)...
July 29, 2017: Biomedical Engineering Online
https://www.readbyqxmd.com/read/28753955/investigation-into-the-effect-of-acoustic-radiation-force-and-acoustic-streaming-on-particle-patterning-in-acoustic-standing-wave-fields
#13
Shilei Liu, Yanye Yang, Zhengyang Ni, Xiasheng Guo, Linjiao Luo, Juan Tu, Dong Zhang, And Jie Zhang
Acoustic standing waves have been widely used in trapping, patterning, and manipulating particles, whereas one barrier remains: the lack of understanding of force conditions on particles which mainly include acoustic radiation force (ARF) and acoustic streaming (AS). In this paper, force conditions on micrometer size polystyrene microspheres in acoustic standing wave fields were investigated. The COMSOL(®) Mutiphysics particle tracing module was used to numerically simulate force conditions on various particles as a function of time...
July 19, 2017: Sensors
https://www.readbyqxmd.com/read/28752005/ultrasound-guided-cannulation-of-the-brachiocephalic-vein-in-infants-and-children-is-useful-and-stable
#14
Mark E Thompson
OBJECTIVE: Ultrasound-guided (USG) cannulation of the brachiocephalic vein (BCV) has been shown to be technically easy. We hypothesised that adoption of USG in-plane cannulation of the BCV as the primary approach to central venous cannulation at our institution would lead to central venous cannulation for a greater variety of indications. METHODS: We performed retrospective, descriptive comparison of all central lines placed in patients aged <16 years who underwent any surgical operation during calendar years 2012-2014 at a small, free-standing children's hospital...
June 2017: Turkish Journal of Anaesthesiology and Reanimation
https://www.readbyqxmd.com/read/28746186/laparoscopic-based-score-assessment-combined-with-a-multiple-disciplinary-team-in-management-of-recurrent-ovarian-cancer-a-single-center-prospective-study-for-personalized-surgical-therapy
#15
Weihong Yang, Zhongping Cheng, Hong Dai, Changchun Long, Hailun Liu
The aim of the study was to evaluate the effect of laparoscopic-based score combined with a multiple disciplinary team (MDT) for predicting optimal cytoreduction and perform personalized surgical treatment in recurrent ovarian cancer (ROC).The study is a single-center, prospective investigation. From March 2013 to May 2015, the consecutive treated patients with platinum-sensitive ROC were collected in Yangpu Hospital. The appropriated patients were enrolled into the study to perform the laparoscopic-based PIV (predictive index value) score assessment with an MDT for predicting optimal cytoreduction...
July 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28745437/vascularized-ulnar-periosteal-pedicled-flap-for-forearm-reconstruction-anatomical-study-and-a-case-report
#16
Barrera-Ochoa Sergi, Velez Roberto, Rodriguez-Baeza Alfonso, De Bergua-Domingo Josep Maria, Knörr Jorge, Soldado Francisco
PURPOSE: Through an anatomical review, the aim of this study is to define the ulnar periosteal branches of the posterior interosseous vessels (PIV). In addition, we report the clinical utility of a vascularized ulnar periosteal pedicled flap (VUPPF), supplied by the investigated PIV, in a complex case of radial nonunion. METHODS: Ten upper limbs latex colored from fresh human cadavers were used. Branches of the PIV were dissected under 2.5× loupe magnification, noting the periosteal, muscular, and cutaneous branches arising distal to the interosseous recurrent artery...
July 26, 2017: Microsurgery
https://www.readbyqxmd.com/read/28742120/virus-induced-asthma-attack-the-importance-of-allergic-inflammation-in-response-to-viral-antigen-in-an-animal-model-of-asthma
#17
Christopher Skappak, Ramses Ilarraza, Ying-Qi Wu, Matthew G Drake, Darryl J Adamko
Asthma exacerbation can be a life-threatening condition, and is most often triggered by common respiratory viruses. Poor asthma control and worsening of respiratory function is associated with increased airway inflammation, including eosinophilia. Prevention of asthma exacerbation relies on treatment with corticosteroids, which preferentially inhibit allergic inflammation like eosinophils. Human studies demonstrate that inactivated virus can trigger eosinophil activation in vitro through antigen presentation and memory CD4+ lymphocytes...
2017: PloS One
https://www.readbyqxmd.com/read/28732945/heat-transfer-enhancement-using-2mhz-ultrasound
#18
Odin Bulliard-Sauret, Sebastien Ferrouillat, Laure Vignal, Alain Memponteil, Nicolas Gondrexon
The present work focuses on possible heat transfer enhancement from a heating plate towards tap water in forced convection by means of 2MHz ultrasound. The thermal approach allows to observe the increase of local convective heat transfer coefficients in the presence of ultrasound and to deduce a correlation between ultrasound power and Nusselt number. Heat transfer coefficient under ultrasound remains constant while heat transfer coefficient under silent conditions increases with Reynolds number from 900 up to 5000...
November 2017: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/28709930/particle-image-velocimetry-study-of-the-celiac-trunk-hemodynamic-induced-by-continuous-flow-left-ventricular-assist-device
#19
Francesco Scardulla, Diego Bellavia, Leonardo D'Acquisto, Giuseppe M Raffa, Salvatore Pasta
Whereas left ventricular assist device (LVAD) is the gold-standard therapy for patients with heart failure, gastrointestinal bleeding is one of the most common complications. LVAD implantation may remarkably impact aortic hemodynamics so that experimental and computational flow analyses can be used to study the disease mechanisms. Here we present an experimentally-calibrated computational model of the celiac trunk hemodynamic of a LVAD-supported patient who experienced bleeding after device implantation. Specifically, both particle image velocimetry (PIV) and echocardiography were used to measure and compare flow distributions in each branch of a phantom model of the patient abdominal aorta...
July 12, 2017: Medical Engineering & Physics
https://www.readbyqxmd.com/read/28708210/particle-image-velocimetry-tests-on-pediatric-45-cc-and-30-cc-ventricle-assist-devices-effects-of-heart-rate-on-vad-operation
#20
Dariusz Witkowski, Damian Obidowski, Piotr Reorowicz, Daniel Jodko, Krzysztof Jozwik
BACKGROUND: This study investigated flow analysis inside pediatric ventricle assist devices (VADs) designed and manufactured at the Foundation for Cardiac Surgery Development (FRK), Zabrze, Poland. The main goal of the experiment was to define the minimal heart rate admissible in clinical practice. METHODS: The flow was directed by mechanical, single-disc valves developed at the Lodz University of Technology, Institute of Turbomachinery in Lodz, Poland. VAD operation conditions under different heart rates were analyzed...
July 8, 2017: International Journal of Artificial Organs
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