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https://www.readbyqxmd.com/read/29453695/temporary-assist-device-support-for-the-right-ventricle-pre-implant-and-post-implant-challenges
#1
REVIEW
Michael Dandel, Roland Hetzer
Severe right ventricular (RV) failure is more likely reversible than similar magnitudes of left ventricular (LV) failure and, because reversal of both adaptive remodeling and impaired contractility require most often only short periods of support, the use of temporary RV assist devices (t-RVADs) can be a life-saving therapy option for many patients. Although increased experience with t-RVADs and progresses made in the development of safer devices with lower risk for complications has improved both recovery rate of RV function and patient survival, the mortality of t-RVAD recipients can still be high but it depends mainly on the primary cause of RV failure (RVF), the severity of end-organ dysfunction, and the timing of RVAD implantation, and much less on adverse events and complications related to RVAD implantation, support, or removal...
February 17, 2018: Heart Failure Reviews
https://www.readbyqxmd.com/read/29452854/assessment-of-the-temperature-cut-off-point-by-a-commercial-intravaginal-device-to-predict-parturition-in-piedmontese-beef-cows
#2
A Ricci, V Racioppi, B Iotti, A Bertero, K F Reed, O B Pascottini, L Vincenti
Dystocic parturitions have an adverse impact on animal productivity and therefore the profitability of the farm. In this regard, accurate prediction of calving is essential since it allows for efficient and prompt assistance of the dam and the calf. Numerous approaches to predict parturition have been studied, among these, measurement of intravaginal temperature (IVT) is the most effective method at the field level. Thus, objectives of this experiment were, 1) to find an IVT cut-off to predict calving within 24 h, and 2) to clarify the use of IVT as an automated method of calving detection in housed beef cows...
February 10, 2018: Theriogenology
https://www.readbyqxmd.com/read/29452273/3d-bioprinted-functional-and-contractile-cardiac-tissue-constructs
#3
Zhan Wang, Sang Jin Lee, Heng-Jie Cheng, James J Yoo, Anthony Atala
Bioengineering of a functional cardiac tissue composed of primary cardiomyocytes has great potential for myocardial regeneration and in vitro tissue modeling. However, its applications remain limited because the cardiac tissue is a highly organized structure with unique physiologic, biomechanical, and electrical properties. In this study, we undertook a proof-of-concept study to develop a contractile cardiac tissue with cellular organization, uniformity, and scalability by using three-dimensional (3D) bioprinting strategy...
February 13, 2018: Acta Biomaterialia
https://www.readbyqxmd.com/read/29450594/position-paper-for-the-organization-of-ecmo-programs-for-cardiac-failure-in-adults
#4
Darryl Abrams, A Reshad Garan, Akram Abdelbary, Matthew Bacchetta, Robert H Bartlett, James Beck, Jan Belohlavek, Yih-Sharng Chen, Eddy Fan, Niall D Ferguson, Jo-Anne Fowles, John Fraser, Michelle Gong, Ibrahim F Hassan, Carol Hodgson, Xiaotong Hou, Katarzyna Hryniewicz, Shingo Ichiba, William A Jakobleff, Roberto Lorusso, Graeme MacLaren, Shay McGuinness, Thomas Mueller, Pauline K Park, Giles Peek, Vin Pellegrino, Susanna Price, Erika B Rosenzweig, Tetsuya Sakamoto, Leonardo Salazar, Matthieu Schmidt, Arthur S Slutsky, Christian Spaulding, Hiroo Takayama, Koji Takeda, Alain Vuylsteke, Alain Combes, Daniel Brodie
Extracorporeal membrane oxygenation (ECMO) has been used increasingly for both respiratory and cardiac failure in adult patients. Indications for ECMO use in cardiac failure include severe refractory cardiogenic shock, refractory ventricular arrhythmia, active cardiopulmonary resuscitation for cardiac arrest, and acute or decompensated right heart failure. Evidence is emerging to guide the use of this therapy for some of these indications, but there remains a need for additional evidence to guide best practices...
February 15, 2018: Intensive Care Medicine
https://www.readbyqxmd.com/read/29449786/impact-of-the-introduction-of-an-endotracheal-tube-attachment-device-on-the-incidence-and-severity-of-oral-pressure-injuries-in-the-intensive-care-unit-a-retrospective-observational-study
#5
Jaye Hampson, Cameron Green, Joanne Stewart, Lauren Armitstead, Gemma Degan, Andrea Aubrey, Eldho Paul, Ravindranath Tiruvoipati
Background: Endotracheal tube (ETT) fasteners such as the AnchorFast™ claim to assist with the prevention of oral pressure injuries in intubated patients, however evidence to support their clinical efficacy is limited. This retrospective observational study aimed to investigate the impact of the introduction of the AnchorFast™ device on the incidence of oral pressure injuries in mechanically ventilated patients. Methods: Data was collected from patient case notes and clinical incident reports for October 2010 to June 2013 ( pre-AnchorFast) and July 2013 to March 2016 ( post-AnchorFast) ...
2018: BMC Nursing
https://www.readbyqxmd.com/read/29448541/preparation-of-polyurethane-acrylate-coated-carbon-nanotube-nanocomposites-by-emulsion-polymerization
#6
Jila Talat, Mohammad Sabzi, Behrouz Safibonab, Iraj Hasanzadeh, Ali Arman, Isa Karimzadeh
The aim of this work was to prepare strong and conductive polyurethane acrylate nanocomposites. First, urethane prepolymers with different molecular weights and hydrophilicities were synthetized. Then, their corresponding polyurethane acrylate nanocomposites were prepared by ultrasonically-assisted emulsion polymerization in the presence of various ratios of urethane prepolymers and acrylate monomers. Thermogravimetric analysis (TGA) and tensile results showed that thermal stability and mechanical properties of polyurethane acrylate samples are significantly dependent on the molecular weight and hydrophilicity of the urethane prepolymer as well as the content of acrylate monomers...
February 1, 2018: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/29448213/preparation-of-dumbbell-manganese-dioxide-gelatin-composites-and-their-application-in-the-removal-of-lead-and-cadmium-ions
#7
Xiu Wang, Kai Huang, Ying Chen, Jiafa Liu, Shan Chen, Jianlei Cao, Surong Mei, Yikai Zhou, Tao Jing
The nano-sized sorbents restrict their practical application in flow-through system due to excessive pressure. In this study, dumbbell MnO 2 /gelatin composites were synthesized based on the protein-assisted synthesis technology. Then they were immobilized on the amino-modified polymethyl methacrylate (PMMA) plate. SEM, TEM, XRD, XPS and FT-IR were employed to study the surface properties and the adsorption mechanism of MnO 2 /gelatin composites. Adsorption experiments for Pb(II) and Cd(II) ions were performed to study the adsorption isotherms, kinetics, and thermodynamics as well as the influencing factors...
February 9, 2018: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/29447252/low-back-electromyography-emg-data-driven-load-classification-for-dynamic-lifting-tasks
#8
Deema Totah, Lauro Ojeda, Daniel D Johnson, Deanna Gates, Emily Mower Provost, Kira Barton
OBJECTIVE: Numerous devices have been designed to support the back during lifting tasks. To improve the utility of such devices, this research explores the use of preparatory muscle activity to classify muscle loading and initiate appropriate device activation. The goal of this study was to determine the earliest time window that enabled accurate load classification during a dynamic lifting task. METHODS: Nine subjects performed thirty symmetrical lifts, split evenly across three weight conditions (no-weight, 10-lbs and 24-lbs), while low-back muscle activity data was collected...
2018: PloS One
https://www.readbyqxmd.com/read/29446624/hydrogen-assisted-growth-of-large-area-continuous-films-of-mos-2-on-monolayer-graphene
#9
Tongxin Chen, Yingqiu Zhou, Yuewen Sheng, Xiaochen Wang, Si Zhou, Jamie H Warner
We show how control over the chemical vapor deposition (CVD) reaction chemistry of molybdenum disulfide (MoS 2 ) by hydrogen addition can enable the direct growth of centimeter-scale continuous films of vertically stacked MoS 2 monolayer on graphene under atmospheric pressure conditions. Hydrogen addition enables longer CVD growth times at high temperature by reducing oxidation effects that would otherwise degrade the monolayer graphene. By careful control of nucleation density and growth time, high-quality monolayer MoS 2 films could be formed on graphene, realizing all CVD-grown vertically stacked monolayer semimetal/semiconducting interfaces...
February 15, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29446208/study-rationale-design-and-pre-transplant-alloantibody-status-a-first-report-of-clinical-trials-in-organ-transplantation-in-children-04-ctotc-04-in-pediatric-heart-transplantation
#10
Warren A Zuckerman, Adriana Zeevi, Kristen L Mason, Brian Feingold, Carol Bentlejewski, Linda J Addonizio, Elizabeth D Blume, Charles E Canter, Anne I Dipchand, Daphne T Hsu, Robert E Shaddy, William T Mahle, Anthony J Demetris, David M Briscoe, Thalachallour Mohanakumar, Joseph M Ahearn, David N Iklé, Brian D Armstrong, Yvonne Morrison, Helena Diop, Jonah Odim, Steven A Webber
Anti-HLA donor-specific antibodies are associated with worse outcomes following organ transplantation. Among sensitized pediatric heart candidates, requirement for negative donor-specific cytotoxicity crossmatch increases wait times and mortality. However, transplantation with positive crossmatch may increase post-transplant morbidity and mortality. We address this clinical challenge in a prospective, multi-center, observational cohort study of children listed for heart transplantation (CTOTC-04). Outcomes were compared among sensitized recipients who underwent transplant with positive crossmatch, non-sensitized recipients, and sensitized recipients without positive crossmatch...
February 15, 2018: American Journal of Transplantation
https://www.readbyqxmd.com/read/29445601/predictors-of-unexpected-nodal-upstaging-in-patients-with-ct1-3n0-non-small-cell-lung-cancer-nsclc-submitted-to-thoracoscopic-lobectomy
#11
Giuseppe Marulli, Enrico Verderi, Giovanni M Comacchio, Nicola Monaci, Giuseppe Natale, Samuele Nicotra, Federico Rea
Background: In the last decades, the use of video-assisted thoracoscopic surgery (VATS) lobectomy for the treatment of early stage non-small cell lung cancer is continuously growing. This is mainly due to the development of more advanced surgical devices, to the rising incidence of peripheral lung tumors and is also favored by the increased reliability of preoperative staging techniques. Despite this progress, postoperative unexpected nodal upstaging is still a relevant issue. Aim of this study is to identify possible predictors of unexpected nodal upstaging in patients affected by cT1-3N0 NSCLC submitted to VATS lobectomy...
2018: Journal of Visualized Surgery
https://www.readbyqxmd.com/read/29444276/extracorporeal-resuscitation-as-a-further-modifier-of-clinical-outcome-in-patients-with-left-ventricular-assist-device-implantation-and-interagency-registry-for-mechanically-assisted-circulatory-support-level-1
#12
Edis Ljajikj, Armin Zittermann, Andreas Koster, Jochen Börgermann, Michael Schönbrodt, Kavous Hakim-Meibodi, Jan Gummert, Michiel Morshuis
In cardiogenic shock patients with Interagency Registry for Mechanical Circulatory Support (INTERMACS) level 1, the need for temporary circulatory support is a predictor and modifier of patient outcome. Because this group includes patients with and without cardiopulmonary resuscitation (CPR) and is thus very heterogeneous, we investigated whether a further subclassification is useful. We compared 30-day and 1-year mortality of patients who underwent left ventricular assist device implantation after extracorporeal CPR with the aid of an extracorporeal life support system (CPR+ group; n = 40) with cardiogenic shock patients in which the extracorporeal life support system was implanted under non-CPR conditions (CPR- group, n = 68)...
February 12, 2018: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/29444250/are-elevated-serum-haemolysis-markers-a-harbinger-of-adverse-events-in-heartmate-ii-patients
#13
Rashad Zayat, Mohamed Shoaib, Mohammad Amen Khattab, Usaama Ahmad, Andreas Goetzenich, Christian Stoppe, Ann Christina Foldenauer, Ajay Moza, Heike Schnoering, Rüdiger Autschbach, Lachmandath Tewarie
OBJECTIVES: Haemolysis during left ventricular assist device support is associated with thrombosis. In this retrospective study, we analysed whether low-level haemolysis (LLH) as defined by simultaneously elevated lactate dehydrogenase (LDH) and free haemoglobin (fHb) levels had an impact on thromboembolic and bleeding events and on von Willebrand factor levels in HeartMate II patients. METHODS: After exclusion of patients with LDH >700 U/l and fHb >40 mg/dl at hospital discharge, 79 HeartMate II patients were included...
February 12, 2018: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/29444172/motor-and-psychosocial-impact-of-robot-assisted-gait-training-in-a-real-world-rehabilitation-setting-a-pilot-study
#14
Cira Fundarò, Anna Giardini, Roberto Maestri, Silvia Traversoni, Michelangelo Bartolo, Roberto Casale
In the last decade robotic devices have been applied in rehabilitation to overcome walking disability in neurologic diseases with promising results. Robot assisted gait training (RAGT) using the Lokomat seems not only to improve gait parameters but also the perception of well-being. Data on the psychosocial patient-robot impact are limited, in particular in the real-world of RAGT, in the rehabilitation setting. During rehabilitation training, the Lokomat can be considered an "assistive device for movement"...
2018: PloS One
https://www.readbyqxmd.com/read/29444005/single-pulse-writing-of-a-concave-microlens-array
#15
Xiao-Wen Cao, Qi-Dai Chen, Lei Zhang, Zhen-Nan Tian, Qian-Kun Li, Lei Wang, Saulius Juodkazis, Hong-Bo Sun
This work developed a method of femtosecond laser (fs-laser) parallel processing assisted by wet etching to fabricate 3D micro-optical components. A 2D fs-laser spot array with designed spatial distribution was generated by a spatial light modulator. A single-pulse exposure of the entire array was used for parallel processing. By subsequent wet etching, a close-packed hexagonal arrangement, 3D concave microlens array on a curved surface with a radius of approximately 120 μm was fabricated, each unit lens of which has designable spatial distribution...
February 15, 2018: Optics Letters
https://www.readbyqxmd.com/read/29443363/sheets-glide-assisted-intraocular-placement-of-the-argus-ii-retinal-prosthesis
#16
Avni P Finn, Lejla Vajzovic
BACKGROUND AND OBJECTIVE: As an increasing number of vitreoretinal surgeons are implanting retinal prosthesis devices, the need to share surgical techniques to ease implantation in challenging scenarios grows. The authors share a technique to aide in overcoming a challenge associated with uveal prolapse in a patient undergoing Argus II retinal prosthesis (Second Sight Medical Products, Sylmar, CA) implantation. PATIENTS AND METHODS: A surgical technique is discussed and demonstrated using a video (Video available at www...
February 1, 2018: Ophthalmic Surgery, Lasers & Imaging Retina
https://www.readbyqxmd.com/read/29443352/levitronix-bilateral-ventricular-assist-device-a-bridge-to-recovery-in-a-patient-with-acute-fulminant-myocarditis-and-concomitant-cerebellar-infarction
#17
Yi-Fan Huang, Po-Shun Hsu, Chien-Sung Tsai, Yi-Ting Tsai, Chih-Yuan Lin, Hong-Yan Ke, Yi-Chang Lin, Hsiang-Yu Yang
We report on the case of a 27-year-old male who presented to our emergency room with chest tightness, dyspnoea and cold sweats. The 12-lead electrocardiogram showed diffuse ventricular tachycardia with wide QRS complexes. Troponin-I level was elevated to 100 ng/ml. The coronary angiogram showed good patency of all three coronary vessels, and acute fulminant myocarditis was suspected. The patient underwent cardiopulmonary resuscitation in the catheter room and high-dose inotropic support was initiated to stabilise his haemodynamic status...
February 7, 2018: Cardiovascular Journal of Africa
https://www.readbyqxmd.com/read/29443008/defect-induced-structural-inhomogeneity-ultraviolet-light-emission-and-near-band-edge-photoluminescence-broadening-in-degenerate-in-sub-2-sub-o-sub-3-sub-nanowires
#18
Souvik Mukherjee, Ketaki Sarkar, Gary Wiederrecht, David J Gosztola, Richard Schaller, Michael A Stroscio, Mitra Dutta
We demonstrate here defect induced changes on the morphology and surface properties of indium oxide (In<sub>2</sub>O<sub>3</sub>) nanowires and further study their effects on the near-band-edge (NBE) emission, thereby showing the significant influence of surface states on In<sub>2</sub>O<sub>3</sub> nanostructure based device characteristics for potential optoelectronic applications. In<sub>2</sub>O<sub>3</sub> nanowires with cubic crystal structure (c-In<sub>2</sub>O<sub>3</sub>) were synthesized via carbothermal reduction technique using a gold-catalyst-assisted vapor-liquid-solid (VLS) method...
February 14, 2018: Nanotechnology
https://www.readbyqxmd.com/read/29442172/structure-shift-of-gan-among-nanowall-network-nanocolumn-and-compact-film-grown-on-si-111-by-mbe
#19
Aihua Zhong, Ping Fan, Yuanting Zhong, Dongping Zhang, Fu Li, Jingting Luo, Yizhu Xie, Kazuhiro Hane
Structure shift of GaN nanowall network, nanocolumn, and compact film were successfully obtained on Si (111) by plasma-assisted molecular beam epitaxy (MBE). As is expected, growth of the GaN nanocolumns was observed in N-rich condition on bare Si, and the growth shifted to compact film when the Ga flux was improved. Interestingly, if an aluminum (Al) pre-deposition for 40 s was carried out prior to the GaN growth, GaN grows in the form of the nanowall network. Results show that the pre-deposited Al exits in the form of droplets with typical diameter and height of ~ 80 and ~ 6...
February 13, 2018: Nanoscale Research Letters
https://www.readbyqxmd.com/read/29441673/plasma-assisted-synthesis-and-surface-modification-of-electrode-materials-for-renewable-energy
#20
REVIEW
Shuo Dou, Li Tao, Ruilun Wang, Samir El Hankari, Ru Chen, Shuangyin Wang
Renewable energy technology has been considered as a "MUST" option to lower the use of fossil fuels for industry and daily life. Designing critical and sophisticated materials is of great importance in order to realize high-performance energy technology. Typically, efficient synthesis and soft surface modification of nanomaterials are important for energy technology. Therefore, there are increasing demands on the rational design of efficient electrocatalysts or electrode materials, which are the key for scalable and practical electrochemical energy devices...
February 14, 2018: Advanced Materials
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