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https://www.readbyqxmd.com/read/29226667/enhanced-thermal-conductivity-of-graphene-nanoplatelet-polymer-nanocomposites-fabricated-via-supercritical-fluid-assisted-in-situ-exfoliation
#1
S Mahdi Hamidinejad, Raymond K M Chu, Biao Zhao, Chul B Park, Tobin Filleter
As electronic devices become increasingly miniaturized, their thermal management becomes critical. Efficient heat dissipation guarantees their optimal performance and service life. Graphene nanoplatelets (GnPs) have excellent thermal properties that show promise for use in fabricating commercial polymer nanocomposites with high thermal conductivity. Herein an industrially-viable technique for manufacturing a new class of lightweight GnP-polymer nanocomposites with high thermal conductivity is presented. Using this method, high-density-polyethylene (HDPE)-GnP nanocomposites with a microcellular structure are fabricated by melt mixing, which is followed by supercritical fluid (SCF)-treatment and injection molding foaming which adds an extra layer of design flexibility...
December 11, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29225707/how-to-evaluate-the-immune-status-of-lung-cancer-patients-before-immunotherapy
#2
Joanna Domagala-Kulawik, Agata Raniszewska
Nowadays, cancer immunotherapy is a promising strategy in solid tumour treatment. It has become a breakthrough in achieving long-term survival in many advanced cases. The essence of modern immunotherapy is to improve the host antitumour immune defence. Currently, it is critically important to determine the biomarkers that could be helpful in planning this type of individual therapy. It has turned out that an important prognostic factor is the evaluation of inflammatory infiltration of the tumour mass, including the characteristics of populations of lymphocytes and macrophages, and the expression of suppressive and regulatory molecules...
December 2017: Breathe
https://www.readbyqxmd.com/read/29223871/intensity-ratio-to-improve-black-hole-assessment-in-multiple-sclerosis
#3
Gautam Adusumilli, Kathryn Trinkaus, Peng Sun, Samantha Lancia, Jeffrey D Viox, Jie Wen, Robert T Naismith, Anne H Cross
BACKGROUND: Improved imaging methods are critical to assess neurodegeneration and remyelination in multiple sclerosis. Chronic hypointensities observed on T1-weighted brain MRI, "persistent black holes," reflect severe focal tissue damage. Present measures consist of determining persistent black holes numbers and volumes, but do not quantitate severity of individual lesions. OBJECTIVE: Develop a method to differentiate black and gray holes and estimate the severity of individual multiple sclerosis lesions using standard magnetic resonance imaging...
December 2, 2017: Multiple Sclerosis and related Disorders
https://www.readbyqxmd.com/read/29221616/dengue-fever-report-from-the-task-force-on-tropical-diseases-by-the-world-federation-of-societies-of-intensive-and-critical-care-medicine
#4
REVIEW
Pravin Amin, Özlem Acicbe, Jorge Hidalgo, Juan Ignacio Silesky Jiménez, Tim Baker, Guy A Richards
Dengue is an arbovirus affecting humans and spread by mosquitoes. Severe dengue follows a secondary infection with a different virus serotype. The problem is truly global as it is endemic in over 100 countries. Severe dengue can be a life-threatening because of increased vascular permeability, resulting in leakage of fluid from the intravascular compartment to the extravascular space. When major bleeding does occur, it is almost invariably combined with profound shock since this, in combination with thrombocytopenia, hypoxia, and acidosis, can lead to multiple organ failure and disseminated intravascular coagulation...
November 5, 2017: Journal of Critical Care
https://www.readbyqxmd.com/read/29219627/non-oncotic-properties-of-albumin-a-multidisciplinary-vision-about-the-implications-for-critically-ill-patients
#5
Ricard Ferrer, Xavier Mateu, Emilio Maseda, Juan Carlos Yébenes, César Aldecoa, Candelaria De Haro, Juan Carlos Ruiz-Rodriguez, José Garnacho-Montero
Effective resuscitation with human albumin solutions is achieved with less fluid than with crystalloid solutions. However, the role of albumin in today's critical care unit is also linked to its multiple pharmacological effects. Areas covered: The potential clinical benefits of albumin in select populations of critically ill patients like sepsis seem related to immunomodulatory and anti-inflammatory effects, antibiotic transportation and endothelial stabilization. Albumin transports many drugs used in critically ill patients...
December 8, 2017: Expert Review of Clinical Pharmacology
https://www.readbyqxmd.com/read/29218312/potassium-homeostasis-oxidative-stress-and-human-disease
#6
Udensi K Udensi, Paul B Tchounwou
Potassium is the most abundant cation in the intracellular fluid and it plays a vital role in the maintenance of normal cell functions. Thus, potassium homeostasis across the cell membrane, is very critical because a tilt in this balance can result in different diseases that could be life threatening. Both Oxidative stress (OS) and potassium imbalance can cause life threatening health conditions. OS and abnormalities in potassium channel have been reported in neurodegenerative diseases. This review highlights the major factors involved in potassium homeostasis (dietary, hormonal, genetic, and physiologic influences), and discusses the major diseases and abnormalities associated with potassium imbalance including hypokalemia, hyperkalemia, hypertension, chronic kidney disease, and Gordon's syndrome, Bartter syndrome, and Gitelman syndrome...
2017: International Journal of Clinical and Experimental Physiology
https://www.readbyqxmd.com/read/29217091/microstructural-changes-associated-with-osteoporosis-negatively-affect-loading-induced-fluid-flow-around-osteocytes-in-cortical-bone
#7
Vittorio Gatti, Evan M Azoulay, Susannah P Fritton
Loading-induced interstitial fluid flow in the microporosities of bone is critical for osteocyte mechanotransduction and for the maintenance of tissue health, enhancing convective transport in the lacunar-canalicular system. In recent studies, our group has reported alterations of bone's vascular porosity and lacunar-canalicular system microarchitecture in a rat model of postmenopausal osteoporosis. In this work, poroelastic finite element analysis was used to investigate whether these microstructural changes can affect interstitial fluid flow around osteocytes...
November 16, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/29216644/prognostic-factors-and-efficacy-for-continuous-renal-replacement-therapy-in-critically-ill-patients-a-chinese-single-center-retrospective-study
#8
Jing Zhang, Yiming Li, Zhiyong Peng
BACKGROUND: There is controversy about the efficacy and prognostic factors for continuous renal replacement therapy (CRRT) in China due to practice variation. Our aim is to investigate these questions. METHOD: A total of 613 adult patients receiving CRRT in last 3 years from one Chinese ICU were enrolled. The analysis of demographic data, vital signs, and laboratory tests prior to CRRT and outcomes were performed. The data between pre- and post-CRRT were compared for efficacy analysis...
December 7, 2017: Blood Purification
https://www.readbyqxmd.com/read/29213070/sensitivity-analysis-of-coupled-processes-and-parameters-on-the-performance-of-enhanced-geothermal-systems
#9
S N Pandey, Vikram Vishal
3-D modeling of coupled thermo-hydro-mechanical (THM) processes in enhanced geothermal systems using the control volume finite element code was done. In a first, a comparative analysis on the effects of coupled processes, operational parameters and reservoir parameters on heat extraction was conducted. We found that significant temperature drop and fluid overpressure occurred inside the reservoirs/fracture that affected the transport behavior of the fracture. The spatio-temporal variations of fracture aperture greatly impacted the thermal drawdown and consequently the net energy output...
December 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29212105/-german-society-of-gastroenterology-digestive-and-metabolic-diseases-dgvs-position-statement-on-endoscopic-decompression-in-acute-ileus
#10
Martin Götz, Georg Braun, Ralf Jakobs, Helmut Messmann, Eduard F Stange, Markus M Lerch
In patients with ileus with dilated intestine in imaging studies, endoscopic decompression appears a feasible option. However, its use is often uncritical and without scientific evidence. Before considering endoscopic intervention, CT-imaging should differentiate between mechanical obstruction and paralytic ileus/intestinal pseudo-obstruction. Tumor diagnosis and localisation are essential because the latter determines the choice of the decompression procedure. Coecal dilatation of more than 12 cm indicates an increased risk of perforation...
December 2017: Zeitschrift Für Gastroenterologie
https://www.readbyqxmd.com/read/29211472/tuning-the-viscoelastic-gel-transition-of-single-wall-carbon-nanotubes-embedded-in-ph-responsive-polyelectrolyte-solutions
#11
Atiđa Selmani, Antonio Tavera-Vazquez, Cristina Garza, Rolando C Castillo
We present the detailed rheological changes that occur when small quantities of single-wall carbon nanotubes are dispersed in a polyacrylic acid water solution, around the overlap polymer concentration, up to the gel point. Here, pH is used to tune the gel formation. Suspensions of nanotubes at pH ≤ 5 are exfoliated and dispersed by the polymer. Contacts between the nanotubes are mainly through polymer entangling, and the suspension is viscoelastic. At pH > 5, the polymer is charged, and the solution is not so good solvent for the nanotubes anymore...
December 6, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/29210355/neuroangiostrongyliasis-the-subarachnoid-phase-and-its-implications-for-anthelminthic-therapy
#12
Paul Prociv, Megan Turner
Infection with the Rat Lungworm Angiostrongylus cantonensis is the leading cause of human eosinophilic meningoencephalitis worldwide. From its origins in southeastern Asia, the parasite was spread extensively throughout the twentieth century and is now established in many of the world's warmer regions. Its clinical effects range from mild and transient symptoms, usually headache with peripheral nerve dysfunction, to severe and permanent central nervous system (CNS) damage, occasionally fatal. The severity and prognosis of disease are determined by the larval dose, acquired by ingesting infected intermediate hosts (slugs and snails) or, less often, paratenic hosts, such as crabs, shrimps, frogs, and monitor lizards...
December 4, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/29207756/intravenous-fluid-administration-and-the-survival-of-pre-hospital-resuscitated-out-of-hospital-cardiac-arrest-patients-in-thailand
#13
Phichet Nongchang, Wongsa Laohasiri Wong, Somsak Pitaksanurat, Pairoj Boonsirik Amchai
Introduction: Out of Hospital Cardiac Arrest (OHCA) is a leading cause of death worldwide. The Emergency Medical Service (EMS) provides early care to critical OHCA patients. Pre hospital intervention has been improving OHCA survival rate, however it is still unclear for the recommendation of routine infusion of Intravenous (IV) fluids during cardiac arrest resuscitation. Aim: This study aimed to determine whether IV fluid administration was associated with increasing survival of resuscitated OHCA patients and to assess the survival rate of resuscitated OHCA patients...
September 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/29206788/matrix-induced-autologous-chondrocyte-implantation-maci-using-a-cell-seeded-collagen-membrane-improves-cartilage-healing-in-the-equine-model
#14
Alan J Nixon, Holly D Sparks, Laila Begum, Sean McDonough, Michael S Scimeca, Nance Moran, Gloria L Matthews
BACKGROUND: Autologous chondrocyte implantation (ACI) using a collagen scaffold (matrix-induced ACI; MACI) is a next-generation approach to traditional ACI that provides the benefit of autologous cells and guided tissue regeneration using a biocompatible collagen scaffold. The MACI implant also has inherent advantages including surgical implantation via arthroscopy or miniarthrotomy, the elimination of periosteal harvest, and the use of tissue adhesive in lieu of sutures. This study evaluated the efficacy of the MACI implant in an equine full-thickness cartilage defect model at 1 year...
December 6, 2017: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/29206492/intravenous-controlled-release-hydrogen-sulfide-protects-against-ventilator-induced-lung-injury
#15
Lifeng Wang, Hao Yu, Yana Zhang, Caiyu Dong, Bo Liu
BACKGROUND: Despite its critical utility in providing life support to patients with impaired respiratory functions, prolonged mechanical ventilation has been found to cause a series of pathological changes in the lung that are collectively referred to as ventilator-induced lung injury (VILI). This study aims to investigate the therapeutic effects of mesoporous silica nanoparticles (DATS-MSN), which is capable of releasing H2S in a slow and controlled manner, on VILI. METHODS: A murine VILI model was generated...
December 5, 2017: Experimental Lung Research
https://www.readbyqxmd.com/read/29205142/necrotizing-fasciitis-associated-with-primary-cutaneous-b-cell-lymphoma-a-case-report
#16
K G Spiridakis, D S Intzepogazoglou, M E Flamourakis, E E Sfakianakis, A V Daskalaki, E K Vakonaki, E Rahmanis, G E Kostakis, M S Christodoulakis
Necrotizing fasciitis is a rapidly progressive and life-threatening infection of the deeper skin layers and subcutaneous tissues that moves along the facial planes. OBJECTIVES: We present the rare case of a patient with necrotizing fasciitis associated with high malignancy b-cell lymphoma. Our purpose is to investigate the probable connection between the two pathologies and evaluate the importance of early surgical intervention. CASE REPORT: 51-year old Caucasian woman presented at the E...
May 2017: Il Giornale di Chirurgia
https://www.readbyqxmd.com/read/29203777/constraints-from-the-dehydration-of-antigorite-on-high-conductivity-anomalies-in-subduction-zones
#17
Duojun Wang, Xiaowei Liu, Tao Liu, Kewei Shen, David O Welch, Baosheng Li
Regions with high electrical conductivities in subduction zones have attracted a great deal of attention. Determining the exact origin of these anomalies could provide critical information about the water storage and cycling processes during subduction. Antigorite is the most important hydrous mineral within deep subduction zones. The dehydration of antigorite is believed to cause high-conductivity anomalies. To date, the effects of dehydration on the electrical conductivity of antigorite remain poorly understood...
December 4, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29203752/-cytotoxicity-in-vitro-as-the-principal-parameter-for-evaluation-of-biocompatibility-of-medical-devices
#18
Beata M Gruber-Bzura
According to the Polish Ministry of Health decree, the medical devices and all raw materials used for their manufacturing are in force to be compatible with biological tissues, cells and body fluids regarding its clinical use. It is defined as biocompatibility. The scope of the methods proposed in the norm PN-EN ISO 10993-1 makes possible to get full preclinical characteristics of the medical device and allows to form the opinion about safety of it to the patients after its marketing. The test directed as the principal to make, independently on characteristics, kind, contact duration and clinical use of the device is cytotoxicity in vitro...
2017: Wiadomości Lekarskie: Organ Polskiego Towarzystwa Lekarskiego
https://www.readbyqxmd.com/read/29202739/the-lung-microbiome-in-patients-with-pneumocystosis
#19
J Kehrmann, B Veckollari, D Schmidt, O Schildgen, V Schildgen, N Wagner, M Zeschnigk, L Klein-Hitpass, O Witzke, J Buer, J Steinmann
BACKROUND: Pneumocystis jirovecii pneumonia (PCP) is an opportunistic fungal infection that is associated with a high morbidity and mortality in immunocompromised individuals. In this study, we analysed the microbiome of the lower respiratory tract from critically ill intensive care unit patients with and without pneumocystosis. METHODS: Broncho-alveolar fluids from 65 intubated and mechanically ventilated intensive care unit patients (34 PCP+ and 31 PCP- patients) were collected...
December 4, 2017: BMC Pulmonary Medicine
https://www.readbyqxmd.com/read/29202543/-experts-consensus-on-the-management-of-the-right-heart-function-in-critically-ill-patients
#20
X T Wang, D W Liu, H M Zhang, Y Long, X D Guan, H B Qiu, K J Yu, J Yan, H Zhao, Y Q Tang, X Ding, X C Ma, W Du, Y Kang, B Tang, Y H Ai, H W He, D C Chen, H Chen, W Z Chai, X Zhou, N Cui, H Wang, X Rui, Z J Hu, J G Li, Y Xu, Y Yang, B Ouyan, H Y Lin, Y M Li, X Y Wan, R L Yang, Y Z Qin, Y G Chao, Z Y Xie, R H Sun, Z Y He, D F Wang, Q Q Huang, D P Jiang, X Y Cao, R G Yu, X Wang, X K Chen, J F Wu, L N Zhang, M G Yin, L X Liu, S W Li, Z J Chen, Z Luo
To establish the experts consensus on the right heart function management in critically ill patients. The panel of consensus was composed of 30 experts in critical care medicine who are all members of Critical Hemodynamic Therapy Collaboration Group (CHTC Group). Each statement was assessed based on the GRADE (Grading of Recommendations Assessment, Development, and Evaluation) principle. Then the Delphi method was adopted by 52 experts to reassess all the statements. (1) Right heart function is prone to be affected in critically illness, which will result in a auto-exaggerated vicious cycle...
December 1, 2017: Zhonghua Nei Ke za Zhi [Chinese Journal of Internal Medicine]
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