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https://www.readbyqxmd.com/read/28227438/poly-n-isopropylacrylamide-hydrogel-based-shape-adjustable-polyimide-films-triggered-by-near-human-body-temperature
#1
Huanqing Cui, Xuemin Du, Juan Wang, Tianhong Tang, Tianzhun Wu, Huanqing Cui, Xuemin Du, Juan Wang, Tianhong Tang, Tianzhun Wu, Huanqing Cui, Tianzhun Wu, Xuemin Du, Tianhong Tang, Juan Wang
Hydrogel-based shape-adjustable films were successfully fabricated via grafting poly(N-isopropylacrylamide) (PNIPAM) onto one side of polyimide (PI) films. The prepared PI-g-PNIPAM films exhibited rapid, reversible, and repeatable bending/unbending property by heating to near-human-body temperature (37 °C) or cooling to 25 °C. The excellent property of PI-g-PNIPAM films resulted from a lower critical solution temperature (LCST) of PNIPAM at about 32 °C. Varying the thickness of PNIPAM hydrogel layer regulated the thermo-responsive shape bending degree and response speed of PI-g-PNIPAM films...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227425/mechanical-performances-of-endovascular-aneurysm-repair-strategies-with-main-aortic-and-chimney-grafts
#2
Wei-Ling Chen, Bing-Feng Huang, Ming-Long Yeh, Chung-Dann Kan, Wei-Ling Chen, Bing-Feng Huang, Ming-Long Yeh, Chung-Dann Kan, Ming-Long Yeh, Bing-Feng Huang, Chung-Dann Kan, Wei-Ling Chen
The use of endovascular aneurysm repair (EVAR) strategies for the treatment of complex aortic pathologies is a major area of investigation in modern surgery. EVAR strategies using fenestrated or branched devices provide alternatives to open surgery for patients with aortic pathologies with visceral branch involvement, but their applications have some major limitations. To extend endovascular repair to patients whose anatomy is unfit for branched or fenestrated stent grafts or open repair, parallel graft techniques using chimney grafts (CGs) have been proposed...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227254/a-data-science-approach-for-quantifying-spatio-temporal-effects-to-graft-failures-in-organ-transplantation
#3
Diego Pinheiro, Farag Hamad, Martin Cadeiras, Ronaldo Menezes, Nezamoddin Nezamoddini-Kachouie, Diego Pinheiro, Farag Hamad, Martin Cadeiras, Ronaldo Menezes, Nezamoddin Nezamoddini-Kachouie, Farag Hamad, Martin Cadeiras, Diego Pinheiro, Ronaldo Menezes, Nezamoddin Nezamoddini-Kachouie
The transplantation of solid organs is one of the most important accomplishments of modern medicine. Yet, organ shortage is a major public health issue; 8,000 people died while waiting for an organ in 2014. Meanwhile, the allocation system currently implemented can lead to organs being discarded and the medical community still investigates factors that affects early graft failure such as distance and ischemic time. In this paper, we investigate early graft failure under a spatio-temporal perspective using a data science unified approach for all six organs that is based on complementary cumulative analysis of both distance and ischemic time...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227134/cardiovascular-interactions-assessed-via-conditional-joint-transfer-entropy-in-patients-developing-atrial-fibrillation-after-coronary-artery-bypass-graft-surgery
#4
Vlasta Bari, Marco Ranucci, Andrea Marchi, Beatrice De Maria, Valeria Pistuddi, Alberto Porta, Vlasta Bari, Marco Ranucci, Andrea Marchi, Beatrice De Maria, Valeria Pistuddi, Alberto Porta, Vlasta Bari, Andrea Marchi, Alberto Porta, Valeria Pistuddi, Beatrice De Maria, Marco Ranucci
Assigned the universe of knowledge Ω as composed by one target and two exogenous signals, the conditional joint transfer entropy (CJTE), assessing the amount of information jointly transferred from the two sources to the target that can be uniquely linked to one of the two sources, was found useful to study cardiovascular control. We propose the assessment of CJTE from systolic arterial pressure (SAP) and respiration (R) to heart period (HP) conditioned on R (CJTESAP, R→HP|R) along the baroreflex, and from HP and R to SAP conditioned on R (CJTEHP, R→SAP|R) along the feedforward mechanical pathway, in 134 patients undergoing coronary artery bypass graft surgery before (PRE) and after (POST) the induction of general anesthesia...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226611/beat-to-beat-variability-of-p-wave-in-patients-suffering-from-atrial-fibrillation
#5
Federica Censi, Giovanni Calcagnini, Eugenio Mattei, Alessandro Ricci, Ivan Corazza, Elisa Reggiani, Giuseppe Boriani, Federica Censi, Giovanni Calcagnini, Eugenio Mattei, Alessandro Ricci, Ivan Corazza, Elisa Reggiani, Giuseppe Boriani, Elisa Reggiani, Giuseppe Boriani, Ivan Corazza, Alessandro Ricci, Federica Censi, Eugenio Mattei, Giovanni Calcagnini
The aim of this paper was to analyze the P-wave variability over time in patients suffering from Atrial Fibrillation (AF). Behind some time-domain and morphological features of the P-wave template, two novel indexes of P-wave variability have been estimated: one based on the cross-correlation coefficients among the P-waves (Correlation Index, CI), and one associated to variation of P-waves amplitude (Amplitude Index, AI). These indexes were estimated in two experimental models: patients suffering from persistent AF respect to control subjects and patients developing post-operative AF (POAF) after coronary artery bypass grafting respect to patients without POAF...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226371/nasal-reconstruction-involving-multiple-subunit-defects
#6
Artemus Cox, Matthew Fort
The challenges of nasal reconstruction are readily apparent to any surgeon who has undertaken this task. Defects involving multiple subunits of the nose usually require adjacent tissue transferred to the wound typically in the form of a forehead flap or other local flaps. Herein, we describe current thought on the subunit principle and the application of local flaps and grafts in reconstructing larger superficial defects of the nose. Primary attention is paid to analysis and patient counseling.
February 2017: Facial Plastic Surgery: FPS
https://www.readbyqxmd.com/read/28226370/osseous-and-cartilaginous-nasal-reconstruction
#7
Samuel Hahn
The nose is a complex, three-dimensional structure that is supported by a framework of osseous and cartilaginous structures. Disruption of this framework can result in nasal deformity and functional deficits. Nasal reconstruction requires restoration of the osseous and cartilaginous framework. This requires careful preoperative assessment of the nasal defect and understanding the nasal and facial aesthetics that are supported by the osseous and cartilaginous support structures. Structural grafts can be classified as restorative, supportive, or contouring...
February 2017: Facial Plastic Surgery: FPS
https://www.readbyqxmd.com/read/28226367/using-grafts-and-granulation-to-improve-nasal-repair
#8
Paul J Gruber, Scott Walen, Sean T Massa, Ian A Maher
Skin grafts offer a dynamic repair option for nasal defects of appropriate size, depth, and location. Granulation and grafting can successfully be used as stand-alone reconstructive options or in conjunction with flap repair. This article reviews suitable indications for graft and granulation use in nasal repair to achieve optimum functional and esthetic outcomes.
February 2017: Facial Plastic Surgery: FPS
https://www.readbyqxmd.com/read/28226189/equitable-distribution-in-rare-indications-for-liver-transplantation-the-dilemma-of-the-too-small-tablecloth-continues
#9
Andreas A Schnitzbauer, Wolf O Bechstein
Primary biliary cholangitis (formerly known as primary biliary cirrhosis) has been a classic indication for liver transplantation for more than thirty years (1). Due to the changing epidemiology of liver diseases combined with the universal lack of post-mortal grafts, the question of prioritizing allocation amongst sick patients competing for these rare grafts on the waiting list remains an unresolved challenge. In their UNOS database analysis Ashwani Singal and coworkers focus on wait-list mortality for a nowadays rare indication for liver transplantation: primary biliary cholangitis (PBC) (2)...
February 22, 2017: Transplant International: Official Journal of the European Society for Organ Transplantation
https://www.readbyqxmd.com/read/28225251/silicone-infused-anti-smudge-nanocoatings
#10
Heng Hu, Jian Wang, Yu Wang, Emily Gee, Guojun Liu
A polyurethane-based NP-GLIDE coating that bears on its surface and in its interior nano-pools of a grafted liquid ingredient for dewetting enablement is obtained from casting and curing a film comprising a triisocyanate, a polyol (P1), and a graft (g) copolymer of P1 and poly(dimethyl siloxane) (P1-g-PDMS). A silicone-infused NP-GLIDE (SINP-GLIDE) PU coating is obtained from co-casting the NP-GLIDE precursors with a free silicone oil (SO) or SO mixture (SOs). This paper reports the preparation of the novel SINP-GLIDE coatings and discusses the effect of changing the amount and type of the infused SO as well as the coating formation conditions on their optical clarity...
February 22, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28225250/membrane-anchoring-comb-like-pseudopeptides-for-efficient-ph-mediated-membrane-destabilization-and-intracellular-delivery
#11
Siyuan Chen, Shiqi Wang, Michal Kopytynski, Marie Bachelet, Rongjun Chen
Endosomal release has been identified as a rate-limiting step for intracellular delivery of therapeutic agents, in particular macromolecular drugs. Herein, we report a series of synthetic pH-responsive, membrane-anchoring polymers exhibiting dramatic endosomolytic activity for efficient intracellular delivery. The comb-like pseudopeptidic polymers were synthesized by grafting different amounts of decylamine (NDA), which act as hydrophobic membrane anchors, onto the pendant carboxylic acid groups of a pseudopeptide, poly(l-lysine iso-phthalamide)...
February 22, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28225193/human-neural-progenitor-transplantation-rescues-behavior-and-reduces-%C3%AE-synuclein-in-a-transgenic-model-of-dementia-with-lewy-bodies
#12
Natalie R S Goldberg, Samuel E Marsh, Joseph Ochaba, Brandon C Shelley, Hayk Davtyan, Leslie M Thompson, Joan S Steffan, Clive N Svendsen, Mathew Blurton-Jones
Synucleinopathies are a group of neurodegenerative disorders sharing the common feature of misfolding and accumulation of the presynaptic protein α-synuclein (α-syn) into insoluble aggregates. Within this diverse group, Dementia with Lewy Bodies (DLB) is characterized by the aberrant accumulation of α-syn in cortical, hippocampal, and brainstem neurons, resulting in multiple cellular stressors that particularly impair dopamine and glutamate neurotransmission and related motor and cognitive function. Recent studies show that murine neural stem cell (NSC) transplantation can improve cognitive or motor function in transgenic models of Alzheimer's and Huntington's disease, and DLB...
February 22, 2017: Stem Cells Translational Medicine
https://www.readbyqxmd.com/read/28225187/new-application-of-chitosan-grafted-polyaniline-in-dispersive-solid-phase-extraction-for-the-separation-and-determination-of-phthalate-esters-in-milk-using-high-performance-liquid-chromatography
#13
Nourolhoda Razavi, Ali Sarafraz Yazdi
Chitosan-grafted polyaniline was synthesized and applied as a sorbent for the preconcentration of phthalate esters in dispersive solid-phase extraction. By coupling dispersive solid-phase extraction with high-performance liquid chromatography and response surface methodology (central composite design), a reliable, sensitive and cost-effective method for simultaneous determination of phthalate esters including dimethyl phthalate, di-n-butyl phthalate, and di(2-ethylhexyl)phthalate was developed. The morphology of sorbent had been studied by scanning electron microscopy and its chemical structure confirmed by Fourier transform infrared spectroscopy...
February 22, 2017: Journal of Separation Science
https://www.readbyqxmd.com/read/28225082/environmentally-friendly-chitosan-pei-grafted-magnetic-gelatin-for-the-highly-effective-removal-of-heavy-metals-from-drinking-water
#14
Bingbing Li, Feng Zhou, Kai Huang, Yipei Wang, Surong Mei, Yikai Zhou, Tao Jing
The development of environmentally friendly sorbents with a high adsorption capacity is an essential problem in the removal of heavy metals from drinking water. In this study, magnetic gelatin was prepared using transglutaminase as a cross-linker, which could only catalyze an acyl-transfer reaction between lysine and glutamine residues of the gelatin and not affect other amino groups. Therefore, it was beneficial for the further modification based on the amino groups, and did not affect the spatial structure of gelatin, which can effectively prevent the embedding of active sites in the polymer matrix...
February 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28225039/ruthenium-based-metallopolymer-grafted-reduced-graphene-oxide-as-a-new-hybrid-solar-light-harvester-in-polymer-solar-cells
#15
R Vinoth, S Ganesh Babu, Vishal Bharti, V Gupta, M Navaneethan, S Venkataprasad Bhat, C Muthamizhchelvan, Praveen C Ramamurthy, Chhavi Sharma, Dinesh K Aswal, Yasuhiro Hayakawa, B Neppolian
A new class of pyridyl benzimdazole based Ru complex decorated polyaniline assembly (PANI-Ru) was covalently grafted onto reduced graphene oxide sheets (rGO) via covalent functionalization approach. The covalent attachment of PANI-Ru with rGO was confirmed from XPS analysis and Raman spectroscopy. The chemical bonding between PANI-Ru and rGO induced the electron transfer from Ru complex to rGO via backbone of the conjugated PANI chain. The resultant hybrid metallopolymer assembly was successfully demonstrated as an electron donor in bulk heterojunction polymer solar cells (PSCs)...
February 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28224947/does-a-continuous-care-model-affect-the-quality-of-life-of-patients-undergoing-coronary-artery-bypass-grafting
#16
Nasrin Razmjoee, Abbas Ebadi, Mohsen Asadi-Lari, Marziyeh Hosseini
The physical and mental needs of patients with coronary heart disease are affected by both the disease and the heart surgery in different ways. Such diverse needs require different approaches. A continuous care model, which involves orientation, sensitization, control, and evaluation, may favorably influence patient outcomes following coronary artery bypass grafting (CABG). We were interested to ascertain whether a continuous care model might lead to improved quality of life, compared with a routine care model, in patients undergoing CABG...
March 2017: Journal of Vascular Nursing: Official Publication of the Society for Peripheral Vascular Nursing
https://www.readbyqxmd.com/read/28224772/effects-of-neutralization-by-soluble-abh-antigens-produced-by-transplanted-kidneys-from-abo-incompatible-secretor-donors
#17
Jieun Kim, Sinyoung Kim, In Sik Hwang, Jong Rak Choi, Jae Geun Lee, Yu Seun Kim, Myoung Soo Kim, Hyun Ok Kim
BACKGROUND: Grafts survive despite blood group antigens on the transplant being continuously exposed to antibodies in the blood of recipients in ABO-incompatible kidney transplantation (ABOi KT), owing to the mechanism of accommodation. We analyzed the immunodynamics of soluble ABH antigens in allografts from secretor donors and the influence of such immunodynamics on accommodation and subsequent graft survival in ABOi KT. METHODS: The genotype of a known human β-galactoside α-1,2-fucosyltransferase gene (FUT2), which determines soluble ABH antigen secretor status, was established in 32 donors for ABOi KT at the Severance Hospital, from June 2010 to July 2015...
May 2017: Annals of Laboratory Medicine
https://www.readbyqxmd.com/read/28224630/the-current-status-of-human-laryngeal-transplantation-in-2017-a-state-of-the-field-review
#18
REVIEW
Giri Krishnan, Charles Du, Jonathan M Fishman, Andrew Foreman, David G Lott, Gregory Farwell, Peter Belafsky, Suren Krishnan, Martin A Birchall
OBJECTIVES: Human laryngeal allotransplantation has long been contemplated as a surgical option following laryngectomy, but there is a paucity of information regarding the indications, surgical procedure, and patient outcomes. Our objectives were to identify all human laryngeal allotransplants that have been undertaken and reported in the English literature and to evaluate the success of the procedure. DATA SOURCES: MEDLINE, Embase, Current Index to Nursing and Allied Health Literature, Web of Science and Scopus, and the Gray literature...
February 22, 2017: Laryngoscope
https://www.readbyqxmd.com/read/28224200/plain-radiographs-can-be-used-for-routine-assessment-of-acl-reconstruction-tunnel-position-with-three-dimensional-imaging-reserved-for-research-and-revision-surgery
#19
REVIEW
Jonathan David Kosy, Vipul I Mandalia
PURPOSE: The position of the osseous tunnels and graft during anterior cruciate ligament (ACL) reconstruction has been the subject of multiple studies aiming for either anatomical placement or an alternative. The assessment of these positions, using post-operative imaging, is therefore of interest to the surgeon in both the evaluation of surgical performance and surveillance of potential complications. The purpose of this review is to identify the optimal use of imaging in both the surveillance of clinical practice and in planning revision surgery...
February 21, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28224072/concomitant-arthroscopic-meniscal-allograft-transplantation-and-anterior-cruciate-ligament-reconstruction
#20
Bryan M Saltzman, Justin W Griffin, Nathan Wetters, Maximilian A Meyer, Brian J Cole, Adam B Yanke
In recent decades, arthroscopic meniscal allograft transplantation (MAT) has been refined as a robust option for the treatment of evolving unicompartmental tibiofemoral arthrosis in the setting of meniscal deficiency. It is imperative that the MAT be performed in a knee with anatomic stability and alignment to reduce aberrant biomechanical forces experienced by the allograft tissue to maintain its durability. Thus, in an anterior cruciate ligament (ACL)-deficient knee, ACL reconstruction (ACLR) must be performed to restore the stable knee environment for the MAT to succeed...
October 2016: Arthroscopy Techniques
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