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Bence Nagy, Mohammed Al-Rawhani, Boon Chong Cheah, Michael P Barrett, David R S Cumming
Scalable immunoassay multiplexing offers a route to creating rapid point-of-care (POC) diagnostics. We present a method for multiplexing immunoassays on the surface of a complementary metal-oxide-semiconductor (CMOS) sensor array integrated circuit (IC) without the use of physical separators such as wells or channels. Major advantages of using a CMOS sensor array include low mass-manufacturing costs, the possibility to multiplex multiple assays on a single IC and improved signal when averaging multiple sensors, along with providing a platform where wash steps can be incor-porated to maximize selectivity and sensitivity compared to paper based lateral flow immunoassay...
April 13, 2018: ACS Sensors
Vitor Gabriel Ribeiro Grossi, Karen Lee, Léa Maria Demarchi, Jussara Bianchi Castelli, Vera Demarchi Aiello
Mesothelial/monocytic incidental cardiac excrescences (MICE) are unusual findings during the histological analysis of material from the pericardium, mediastinum, or other tissues collected in open-heart surgery. Despite their somewhat worrisome histological appearance, they show a benign clinical course, and further treatment is virtually never necessary. Hence, the importance of recognizing the entity relays in its differential diagnosis, as an unaware medical pathologist may misinterpret it for a malignant neoplasm...
January 2018: Autopsy & Case Reports
Roland Hetzer, Mariano Francisco Del Maria Javier, Eva Maria Delmo Walter
Background: While heart transplantation has gained recognition as the gold standard therapy for advanced heart failure, the scarcity of donor organs has become an important concern. The evolution of surgical alternatives such as ventricular assist devices (VADs), allow for recovery of the myocardium and ensure patient survival until heart transplantation becomes possible. This report elaborates the role of VADs as a bridge to heart transplantation in infants and children (≤18 years old) with end-stage heart failure...
January 2018: Annals of Cardiothoracic Surgery
Celina Faig Lima, Monica Ghislaine Oliveira Alves, Bruna Fernandes do Carmo Carvalho, Thaynara Alves de Lima, Cláudia Malheiros Coutinho-Camillo, Fernando Augusto Soares, Jaqueline Scholz, Janete Dias Almeida
BACKGROUND: In the oral cavity, genomic instability is caused by long-term exposure to carcinogens. The aim of this study was to evaluate the relationship between smoking and DNA ploidy. METHODS: Cytological material was obtained from patients participating in the Outpatient Smoking Treatment Program of the Heart Institute (INCOR-HCFMUSP), and of the Discipline of Oral Medicine (ICT-UNESP). The inclusion criteria for all groups were the absence of a history of malignant tumors, absence of clinical signs of changes in the selected area, and alcohol consumption of less than 3 units per week...
July 20, 2017: Journal of Oral Pathology & Medicine
Maria Tereza Fernandes Abrahão, Moacyr Roberto Cuce Nobre, Marco Antonio Gutierrez
INTRODUCTION: An electronic healthcare record (EHR) system, when used by healthcare providers, improves the quality of care for patients and helps to lower costs. Information collected from manual or electronic health records can also be used for purposes not directly related to patient care delivery, in which case it is termed secondary use. EHR systems facilitate the collection of this secondary use data, which can be used for research purposes like observational studies, taking advantage of improvement in the structuring and retrieval of patient information...
June 2017: International Journal of Medical Informatics
M Schettini-Soares, O G Júnior, H F Costa, L M Fernandes, L G Abdalla, S V Campos, R H O B Teixeira, M N Samano, P M Pêgo-Fernandes
BACKGROUND: The first human lung transplantation was performed by James Hardy in 1963 due to lung cancer. Currently, malignancy has its importance in the follow-up of transplanted patients because cancer risk is higher in this population and the main risk factor for this augmentation is immunosuppression. The most common types of cancer are non-melanoma skin cancer and post-transplantation lymphoproliferative diseases. The objective of this study is to measure the cancer incidence and its related mortality in lung-transplanted patients of a Brazilian institution...
May 2017: Transplantation Proceedings
H F Costa, P Malvezzi Messias, F P dos Reis, O Gomes-Junior, L M Fernandes, L G Abdalla, S V Campos, R H O B Teixeira, M N Samano, P M Pêgo-Fernandes
Surgical and nonsurgical abdominal complications have been described after lung transplantation. However, there is limited data on this event in this population. The objective of this study was to analyze the incidence of abdominal complications in patients undergoing lung transplantation at the Heart Institute of the Faculty of Medicine, University of São Paulo (InCor-HCFMUSP) between the years 2003 and 2016. The main causes of abdominal complications were inflammatory acute abdomen (7 patients; 14%), obstructive acute abdomen (9 patients; 18%), gastroparesis (4 patients; 8%), distal intestinal obstruction syndrome (4 patients; 8%), perforated acute abdomen (7 patients; 14%), cytomegalovirus (CMV; 6 patients; 12%), and other reasons (12 patients; 26%)...
May 2017: Transplantation Proceedings
Yu Liu, Kun Miao, Noah P Dunham, Hongbin Liu, Matthew Fares, Amie K Boal, Xiaosong Li, Xin Zhang
The design of fluorogenic probes for a Halo tag is highly desirable but challenging. Previous work achieved this goal by controlling the chemical switch of spirolactones upon the covalent conjugation between the Halo tag and probes or by incorporating a "channel dye" into the substrate binding tunnel of the Halo tag. In this work, we have developed a novel class of Halo-tag fluorogenic probes that are derived from solvatochromic fluorophores. The optimal probe, harboring a benzothiadiazole scaffold, exhibits a 1000-fold fluorescence enhancement upon reaction with the Halo tag...
March 21, 2017: Biochemistry
Christian Rojas-Contreras, Gabriel De la Cruz-Ku, Bryan Valcarcel-Valdivia
INTRODUCTION: Heart transplantation remains as the treatment of choice when the heart failure is refractory to the medical or surgical therapy. Therefore, cytomegalovirus disease is an important post-heart-transplant infectious complication. AIMS: To describe the prevalence and clinical characteristics of the cytomegalovirus disease after heart transplant surgery. MATERIALS AND METHODS: A retrospective, descriptive study was conducted. It enrolled 35 heart-transplant patients attended in the Cardiovascular National Institute (INCOR), between 2010 and 2015...
December 2016: Revista Chilena de Infectología: órgano Oficial de la Sociedad Chilena de Infectología
Tien-En Chen, Shih-I Yang, Li-Ting Ho, Kun-Hsi Tsai, Yu-Hsuan Chen, Yun-Fan Chang, Ying-Hui Lai, Syu-Siang Wang, Yu Tsao, Chau-Chung Wu
OBJECTIVE: This study focuses on the first (S1) and sec-ond (S2) heart sound recognition based only on acoustic charac-teristics; the assumptions of the individual durations of S1 and S2 and time intervals of S1-S2 and S2-S1 are not involved in the recognition process. The main objective is to investigate whether reliable S1 and S2 recognition performance can still be attained under situations where the duration and interval information might not be accessible. METHODS: A deep neural network (DNN) method is proposed for recognizing S1 and S2 heart sounds...
April 27, 2016: IEEE Transactions on Bio-medical Engineering
Josías Caleb Ríos Ortega, Paul Castañeda Castillo, Luisa Talledo Paredes, Franz Soplopuco Palacios, Necemio Aranda Pretell, Yemmy Pérez Valverde, Julio Morón Castro, Andrés Reyes Torres
INTRODUCTION: Coronary artery bypass graft (CABG) surgery remains the reference standard in the treatment of multivessel coronary disease. Several studies have shown that CABG with bilateral internal mammary arteries (BIMA) has better results in long-term survival. METHODOLOGY: A retrospective study was conducted on CABG surgeries with BIMA from January 2012 to December 2015 in the National Cardiovascular Institute, INCOR, EsSalud, Peru. The objectives were to determine the mortality and major cardiovascular events at 30 days follow-up...
January 2018: Archivos de Cardiología de México
Daniele Camboni, Matthaeus Zerdzitzki, Stephan Hirt, René Tandler, Michael Weyand, Christof Schmid
Objectives: A silicone interface at skin level of left ventricular assist device (LVAD) may reduce the risk of driveline (DL) exit site infections when compared with other materials (e.g. velour). The purpose of this study was to evaluate the rate of DL exit site infection according to the presence of silicone or velour at the exit site with the redesigned INCOR, facilitating the positioning of silicone at the exit site. Methods: The rate of DL exit site infection and overall survival were compared between the two groups (silicone group, n = 16/velour group, n = 24) with 1-year follow-up postimplantation...
February 1, 2017: Interactive Cardiovascular and Thoracic Surgery
Jocelânio W Oliveira, Dione M Valença, Pledson G Medeiros, Magaly Marçula
The use of control charts for monitoring schemes in medical context should consider adjustments to incorporate the specific risk for each individual. Some authors propose the use of a risk-adjusted survival time cumulative sum (RAST CUSUM) control chart to monitor a time-to-event outcome, possibly right censored, using conventional survival models, which do not contemplate the possibility of cure of a patient. We propose to extend this approach considering a risk-adjusted CUSUM chart, based on a cure rate model...
November 2016: Biometrical Journal. Biometrische Zeitschrift
Ryosuke Sei, Suguru Kitani, Tomoteru Fukumura, Hitoshi Kawaji, Tetsuya Hasegawa
Discovery of layered superconductors such as cuprates and iron-based compounds has unveiled new science and compounds. In these superconductors, quasi-two-dimensional layers including transition metal cations play principal role in the superconductivity via carrier doping by means of aliovalent-ion substitution. Here, we report on a two-dimensional superconductivity at 2 K in ThCr2Si2-type layered oxide Y2O2Bi possessing conducting monatomic Bi(2-) square net, possibly associated with an exotic superconductivity...
September 7, 2016: Journal of the American Chemical Society
Marina Pieri, Marcus Müller, Anna Mara Scandroglio, Panagiotis Pergantis, Alexandra Kretzschmar, Friedrich Kaufmann, Volkmar Falk, Thomas Krabatsch, Georg Arlt, Evgenij Potapov, Marian Kukucka
Mediastinitis is more frequent in patients with implantable ventricular assist devices (VADs) than in other cardiac surgery patients and carries significant mortality. We report our experience with a stepwise approach including aggressive debridement, jet lavage, vacuum assisted closure dressing, and finally coverage with well-vascularized and immune-active omental flaps in VAD patients with infective mediastinitis. We retrospectively collected and analyzed data of patients with continuous flow VAD who underwent plasty with the omental flap because of mediastinitis at Deutsches Herzzentrum Berlin between January 1, 2008 and October 30, 2015...
November 2016: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
Antonio de Padua Mansur, Alessandra Roggerio, Júlio Yoshio Takada, Pérola Michelle Vasconcelos Caribé, Solange Desirée Avakian, Célia Maria Cassaro Strunz
CONTEXT AND OBJECTIVES: Glycoprotein inhibitors (abciximab, eptifibatide and tirofiban) are used in patients with unstable angina and non-ST-segment elevation myocardial infarction before percutaneous coronary intervention. Of these, tirofiban is the least effective. We hypothesized that the response to tirofiban might be associated with glycoprotein gene mutations. DESIGN AND SETTING: Prospective study at Emergency Unit, Heart Institute (InCor), University of São Paulo...
January 19, 2016: São Paulo Medical Journal, Revista Paulista de Medicina
Attilio Iacovoni, Paolo Centofanti, Matteo Attisani, Alessandro Verde, Amedeo Terzi, Michele Senni, Massimo Maiani, Andrea Baronetto, Ugo Livi, Maria Frigerio, Mauro Rinaldi
BACKGROUND: Left ventricular assist device (LVAD) implantation improves survival and quality of life in patients with advanced heart failure (HF). Despite these advantages, LVADs are not free from risks. Among all adverse events (AE), pump thrombosis and bleeding, especially of the gastrointestinal (GI) tract, have been reported to occur with increasing frequency in some CF-LVADs. The INCOR LVAD system is a third-generation, continuous flow, axial pump with active magnetic levitation, avoiding the potential downsides of mechanical bearings...
October 2015: International Journal of Artificial Organs
Manuel Alberto Chacón-Diaz, Jorge Alonso Barrios-Escalante, Daniel Espinoza-Alva
OBJECTIVE: To assess the features of asymptomatic patients with acute ST segment elevation myocardial infarction who presents to the emergency with more than 12h of evolution, and if there is a benefit of an invasive versus medical therapy. METHODS: Retrospective, cohort study from January 2012 to December 2014, we compare the outcomes at 6 and 12 months of follow up of the invasive group versus the conservative group. RESULTS: There were no differences in outcomes at 12 months between an invasive versus a conventional strategy; but, looking at the reperfusion state, we found more risk of death and heart failure at 12 months in the no-reperfused group versus the reperfused group (40% versus 0%, OR: 2, CI: 1...
April 2016: Archivos de Cardiología de México
Zhiwei Ren, Yang Wang, Shiqing Ma, Shun Duan, Xiaoping Yang, Ping Gao, Xu Zhang, Qing Cai
In this study, thermosensitive poly(N-isopropylacrylamide) (PNIPAAm) was grafted onto gelatin via atom transfer radical polymerization (ATRP). The chemical structure of PNIPAAm-grafted gelatin (Gel-PNIPAAm) was confirmed by XPS, ATR-IR, and (1)H NMR characterizations. Gel-PNIPAAm aqueous solution exhibited sol-to-gel transformation at physiological temperature, and was studied as injectable hydrogel for bone defect regeneration in a cranial model. The hydrogel was biocompatible and demonstrated the ability to enhance bone regeneration in comparison with the untreated group (control)...
September 2, 2015: ACS Applied Materials & Interfaces
Angelo Maria Dell'Aquila, Stefan R B Schneider, Paolo Risso, Henryk Welp, David G Glockner, Sebastian Alles, Jürgen R Sindermann, Mirela Scherer
Poor survival has been demonstrated after ventricular assist device (VAD) implantation for Interagency Registry for Mechanically Assisted Circulatory Support (INTERMACS) profile 1 and 2 patients compared with more stable levels. However, risk factors within this high-risk cohort have not been determined so far. The aim of the present study was to identify risk factors associated with this very high mortality rate. Between February 1993 and January 2013, 298 patients underwent VAD implantation in our institution...
December 2015: Artificial Organs
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