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302. VIM-Klebsiella oxytoca outbreak in a Neonatal Intensive Care Unit. This time it wasn't the drain

Author

HERRUZO, R., RUIZ, G., GALLEGO, S., DIEZ, J., SARRIA, A., and OMEÑACA, F.

Subjects
NICU, Male, 0301 basic medicine, 030106 microbiology, beta-Lactamases, Disease Outbreaks, 03 medical and health sciences, Bacterial Proteins, Intensive Care Units, Neonatal, polycyclic compounds, Humans, VIM-Klebsiella oxytoca, Prospective Studies, Sanitation, Equipment and Supplies, Hospital, Cross Infection, Infection Control, Infant, Newborn, Klebsiella oxytoca, biochemical phenomena, metabolism, and nutrition, Sink (drain), Hospitals, Pediatric, bacterial infections and mycoses, Klebsiella Infections, VIM-K. oxytoca, sink (drain), Spain, Equipment Contamination, Original Article, Female
Abstract

Objective: We describe an outbreak of VIM-carbapenemase-K. oxytoca (VIM-Kox) in a NICU Study design: Prospective Epidemiological Surveillance: a) Systematically (weekly screening cultures) or on admission, if the patient had a history of previous colonization by VIM-Kox. b) Clinical cultures, done if infection was suspected. c) Other possible microorganism sources were investigated: their mothers (rectal microbiota), milk packages and preparation apparata in the lactodietary section, echocardiagram transductors, cribs, the sinks (faucets and drains), washing bowls, etc. Molecular typing was performed using the DiversiLab (bioMérieux) system on all VIM-Kox isolated from environment or patients (one by neonate). Results: We identified 20 VIM-Kox cases, the most only presented colonization, but 4 showed infection. Three of the ten sinks (drains) in our NICU, were positive for VIM-Kox. Another four drains harbored P.aeruginosa, S. maltophilia and/or Enterobacter sp. Nevertheless the VIM-Kox bacteria in the sinks (drains) were not the same as those in the patients, who showed three different strains Conclusions: - A VIM-Kox colonization or infection outbreak in a NICU is described. -Rather than environment, not even drains, the source of the outbreak was other patients. -The outbreak was relatively brief, as a result of the rapidness with which appropriate measures were taken and followed., Journal of Preventive Medicine and Hygiene, Vol 58, No 4 (2017): 2017584

Published
2017
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303. The Anisian continental-marine transition in Sardinia (Italy): state of the art, new palynological data and regional chronostratigraphic correlation

Author

Stori, L., Diez, J. B., Juncal, M., De la Horra, R., Borruel-Abadía, V., Martín-Chivelet, J., Barrenechea, J. F., López-Gómez, J., and Ronchi, A.

Abstract

The scarce evidence of paleontological records between the upper Permian and the Anisian (Middle Triassic) of Western Europe could reflect (1) large stratigraphic gaps in the continental successions and/or (2) the persistence of disturbed conditions after the Permian–Triassic Boundary extinction event and the succession of ecological crises that occurred during the Early Triassic. In this context, the study of palynological associations, integrated with the stratigraphical and sedimentological data, plays a key role in dating and correlating the successions of the Western European domain and improves our understanding of environmental and paleoclimatic conditions. In some cases, pre-Anisian paleontological evidence is lacking, as in Sardinia (Italy), where a long gap encompasses the middle Permian (pars) to late Lower Triassic successions. Although fragmented and disseminated, the continental Lower-Middle Triassic sedimentary successions (Buntsandstein) of Sardinia have proved crucial to our understanding of the evolution of the southern edge of the Paleo-Europe and the different timings of the Tethys transgression (Muschelkalk facies) in some of these areas. Various paleogeographic reconstructions were attempted in previous works, without providing any consensus on the precise position of Sardinia and its surrounding seaways in the Western Tethys domain during this time interval. At present, the configuration and distribution of the subsiding and emerging landmasses and the temporal development of the transgressions of the Western Tethys during the Middle Triassic remain unclear. This work focuses on the stratigraphical, sedimentological and palynological aspects of three Middle Triassic continental-marine sedimentary successions in Sardinia, with particular attention to the analysis of the palynological associations sampled there, and it also provides a detailed review of all previous palynological publications on the Sardinian Anisian. The studied successions are: Su Passu Malu section (Campumari, SW Sardinia), Arcu is Fronestas section and Escalaplano section (Escalaplano, Central Sardinia). These sections were also correlated to other significant sections in the SW (Scivu Is Arenas) and NW (Nurra) parts of the island.

Published
2022
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313. Influence of Ag on the properties of Ca0.9Yb0.1MnO3 sintered ceramics

Author

Agencia Estatal de Investigación (España), Gobierno de Aragón, Ministerio de Ciencia, Innovación y Universidades (España), European Commission, Ministerio de Economía y Competitividad (España), Sotelo, A., Torres, M. A., Madre, M. A., Diez, J. C., Agencia Estatal de Investigación (España), Gobierno de Aragón, Ministerio de Ciencia, Innovación y Universidades (España), European Commission, Ministerio de Economía y Competitividad (España), Sotelo, A., Torres, M. A., Madre, M. A., and Diez, J. C.

Abstract

In this study, Ca0.9Yb0.1MnO3 + x wt.% Ag (with x = 0, 1, 3, 5, and 10) thermoelectric materials were prepared via the classical ceramic method. In spite of the very high sintering temperature (1300 °C), no significant Ag losses were observed following this process. Moreover, Ag addition enhanced cation mobility during sintering due to the formation of a liquid phase. Microstructurally, it was found that Ag decreases porosity; this was confirmed by density measurements. Ag was also found to promote the formation of a Ca2Mn2O5 secondary phase. Despite the presence of this secondary phase, samples with Ag displayed lower electrical resistivity than Ag-free ones, without a drastic decrease in the absolute Seebeck coefficient. The highest thermoelectric performances, which were determined by power factor, were obtained in 1 wt.% Ag samples. These maximum values are slightly higher than the best of those reported in the literature for sintered materials with similar compositions, with the additional advantage of their being obtained using a much shorter sintering procedure.

Published
2018

314. Cohort Profile : The Epidemiology of Chronic Diseases and Multimorbidity. The EpiChron Cohort Study

Author

Prados-Torres, A., Poblador-Plou, B., Gimeno-Miguel, A., Calderón-Larrañaga, Amaia, Poncel-Falco, A., Gimeno-Feliu, L. A., Gonzalez-Rubio, F., Laguna-Berna, C., Marta-Moreno, J., Clerencia-Sierra, M., Aza-Pascual-Salcedo, M., Bandres-Liso, A. C., Coscollar-Santaliestra, C., Pico-Soler, V., Abad-Diez, J. M., Prados-Torres, A., Poblador-Plou, B., Gimeno-Miguel, A., Calderón-Larrañaga, Amaia, Poncel-Falco, A., Gimeno-Feliu, L. A., Gonzalez-Rubio, F., Laguna-Berna, C., Marta-Moreno, J., Clerencia-Sierra, M., Aza-Pascual-Salcedo, M., Bandres-Liso, A. C., Coscollar-Santaliestra, C., Pico-Soler, V., and Abad-Diez, J. M.

Published
2018
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315. Trait-dependent distributional shifts in fruiting of common British fungi

Author

Gange, A. C., Heegaard, E., Boddy, L., Andrew, C., Kirk, P., Halvorsen, R., Kuyper, T. W., Baessler, C., Diez, J., Heilman-Clausen, J., Høiland, K., Büntgen, U., Kauserud, H., Gange, A. C., Heegaard, E., Boddy, L., Andrew, C., Kirk, P., Halvorsen, R., Kuyper, T. W., Baessler, C., Diez, J., Heilman-Clausen, J., Høiland, K., Büntgen, U., and Kauserud, H.

Published
2018

316. Optimization of thermoelectric oxides processing for their integration in commercial modules for power generation

Author

Sotelo, Andres, Garcia, Gustavo, Urrutibeascoa, Idoia, Gómez, J. A., Torres, M. A., Martínez-Filgueira, P., Madre, M. A., Diez, J. C., Sotelo, Andres, Garcia, Gustavo, Urrutibeascoa, Idoia, Gómez, J. A., Torres, M. A., Martínez-Filgueira, P., Madre, M. A., and Diez, J. C.

Abstract

In this work, the research and industrial standards for obtaining high performances thermoelectric materials will be presented. In a first step, preparation of high thermoelectric performances materials will be researched using the existing know-how in our group. Once determined the adequate material, the evaluation of synthesis and processing procedures will be performed, with a special emphasis on the results reproducibility. After achieving these research objectives (taken as reference properties), the industrial applications require more restrictive conditions, mainly based on economic constraints. Consequently, the previously obtained results can be used as a quality standard which should be reached by decreasing the number of processing steps, or the time spent on each one, to decrease their economic impact on the final product without significant losses on the previously obtained reference properties. All samples have been characterized using different techniques to determine structure of the material, thermal, electrical and thermoelectric properties and mechanical behaviour, in order to assure their quality. Moreover, some characterizations of these properties after long thermal treatments have been performed.

Published
2018

317. Superconducting stacks: In search of superior superconductors

Author

Torres, M. A., Rasekh, Sh., Madre, M. A., Diez, J. C., Sotelo, Andres, Torres, M. A., Rasekh, Sh., Madre, M. A., Diez, J. C., and Sotelo, Andres

Abstract

Since the discovery of superconductivity phenomena in mercury at 4.2 K in 1911, great efforts have been employed to find superconducting materials that are able to operate at room temperature. Unfortunately, in spite of the discovery of different superconductors, at present, the so-called high-temperature superconductors (HTSC) maintain their superconducting behavior only a little above liquid nitrogen temperature (77 K).

Published
2018

318. In-situ infrared thermography measurements to master transmission laser welding process parameters of PEKK

Author

Ministère de l’Enseignement supérieur et de la Recherche (France), Villar, Miguel, Garnier, Christian, Chabert, F., Nassiet, V., Samélor, D., Diez, J. C., Sotelo, Andres, Madre, M. A., Ministère de l’Enseignement supérieur et de la Recherche (France), Villar, Miguel, Garnier, Christian, Chabert, F., Nassiet, V., Samélor, D., Diez, J. C., Sotelo, Andres, and Madre, M. A.

Abstract

The temperature field along the thickness of the specimens has been measured during transmission laser welding. Polyetherketoneketone (PEKK) is a very high performance thermoplastic with tunable properties. We have shown that this grade of PEKK can be turned to quasi-amorphous or semi-crystalline material, due to its slow kinetics of crystallization. Its glass transition temperature is 150 °C. The effect of its crystalline rate directly impacts its optical properties: the transmittance of quasi-amorphous PEKK is about 60% in the NIR region (wavelength range from 0.4 to 1.2 µm) whereas it is less than 3% for the semi-crystalline material. The welding tests have been carried out with an 808 nm laser diode apparatus. The heat field is recorded during the welding experiment by infrared thermography with the camera sensor perpendicular to the lasersheet and to the sample's length to focus on the welded interface. The study is divided in two steps: firstly, a single specimen is irradiated with an energy density of 22 J.mm−²: the whole sample thickness is heated up, the maximum temperature reaches 222 ± 7°C. This temperature corresponds to about Tg + 70°C, but the polymer does not reach its melting temperature. After that, welding tests were performed: a transparent (quasi-amorphous) sample as the upper part and an opaque (semi-crystalline) one as the lower part were assembled in static conditions. The maximum temperature reached at the welded interface is about 295°C when the upper specimen is irradiated for 16 s with an energy density of 28 J.mm−². The temperature at the welded interface stays above Tg during 55 s and reached the melting temperature during 5 s before rapid cooling. These parameters are suitable to assemble both polymeric parts in a strong weld. This work shows that infrared thermography is an appropriate technique to improve the reliability of laser welding process of high performance thermoplastics.

Published
2018

319. High thermoelectric performances of Bi–AE–Co–O compounds directionally growth from the melt

Author

Ministerio de Economía y Competitividad (España), European Commission, Gobierno de Aragón, Diez, J. C., Rasekh, Sh., Madre, M. A., Torres, M. A., Sotelo, Andres, Ministerio de Economía y Competitividad (España), European Commission, Gobierno de Aragón, Diez, J. C., Rasekh, Sh., Madre, M. A., Torres, M. A., and Sotelo, Andres

Abstract

[EN]: Bi2AE2Co2Ox (AE = Ca, Sr, and Ba) thermoelectric compounds were grown from the melt by the laser floating zone technique. Microstructural analysis of as-grown samples has shown the formation of well-aligned thermoelectric grains together with a relative high amount of secondary phases. On the other hand, a short (24 h) thermal treatment (810 °C for Sr, 800 °C for Ca, and 750 °C for Ba) under air, raises of thermoelectric phase content through the recombination of the secondary ones. These microstructural modifications led to a large decrease of electrical resistivity, improving the power factor. These results have been compared with samples prepared by the conventional solid state method and with the best values reported in the literature. From these data, it is possible to deduce that the high thermoelectric characteristics obtained in these samples make them very attractive for practical applications., [ES]: Se han crecido materiales termoeléctricos de la familia Bi2AE2Co2Ox (AE = Ca, Sr y Ba) mediante la técnica de fusión zonal flotante inducida por láser. Los estudios microestructurales han revelado que las muestras crecidas están formadas por granos termoeléctricos bien alineados, acompañados de cantidades apreciables de fases secundarias. Por otro lado, la cantidad de fase termoeléctrica se ha aumentado mediante cortos (24 h) tratamientos térmicos (810 °C para el Sr, 800 °C para el Ca y 750 °C para el Ba) en aire, por reacción de las fases secundarias. Estas modificaciones microestructurales han originado una reducción de la resistividad eléctrica, mejorando el factor de potencia. Los resultados obtenidos se han comparado con los correspondientes a muestras preparadas mediante un proceso clásico en el estado sólido, así como con los mejores resultados que se pueden encontrar en la bibliografía. Todo ello indica que las muestras obtenidas en este trabajo pueden ser muy atractivas para aplicaciones prácticas.

Published
2018

320. New environmentally friendly Ba-Fe-O thermoelectric material by flexible laser floating zone processing

Author

Gobierno de Aragón, Ministerio de Economía y Competitividad (España), European Commission, Universidade de Aveiro, Fundação para a Ciência e a Tecnologia (Portugal), Ministério da Educação e Ciência (Portugal), Ferreira, N. M., Costa, F. M., Kovalevsky, A. V., Madre, M. A., Torres, M. A., Diez, J. C., Sotelo, Andres, Gobierno de Aragón, Ministerio de Economía y Competitividad (España), European Commission, Universidade de Aveiro, Fundação para a Ciência e a Tecnologia (Portugal), Ministério da Educação e Ciência (Portugal), Ferreira, N. M., Costa, F. M., Kovalevsky, A. V., Madre, M. A., Torres, M. A., Diez, J. C., and Sotelo, Andres

Abstract

Ceramics with nominal BaFe12Ox composition were processed through laser floating zone technique from 25 to 200 mm/h growth rates. These processing conditions were found to promote microstructural differences between the outer and inner parts of the rods, being more pronounced at higher growth rates. Along with the higher microstructural inhomogeneity, the samples grown at 100 and 200 mm/h display reasonable n-type thermoelectric properties provided by BaFe18Ox phase formation. Their highest power factor measured at 800 °C is comparable to the best observed so far in oxide ceramic materials, with additional advantage of high abundance and low costs of Fe2O3, and BaCO3 precursors.

Published
2018

321. Improving bulk Ca3Co4O9 thermoelectric materials through Zr doping

Author

Gobierno de Aragón, Ministerio de Economía y Competitividad (España), European Commission, Madre, M. A., Rasekh, Sh., Torres, M. A., Diez, J. C., Sotelo, Andres, Gobierno de Aragón, Ministerio de Economía y Competitividad (España), European Commission, Madre, M. A., Rasekh, Sh., Torres, M. A., Diez, J. C., and Sotelo, Andres

Abstract

Ca3Co4−xZrxOy polycrystalline ceramics with small Zr substitution have been prepared through the classical solid-state method. X-ray diffraction data have shown that all samples are composed only of Ca3Co4O9 and Ca3Co2O6 phases. Moreover, by increasing Zr substitution up to 0.07, Ca3Co2O6 phase content is decreased. Density measurements have revealed that all samples are very similar, with values around 74% of the theoretical density. Electrical resistivity is decreased in Zr-doped samples, with respect to the pure samples, while Seebeck coefficient is unchanged. Both factors lead to power factor values around 0.33 mW K−2 m−1 at 800°C in 0.07 Zr-doped samples, which are about 65% higher than those obtained for the undoped samples.

Published
2018

322. Effect of simultaneous K, and Yb substitution for Ca on the microstructural and thermoelectric characteristics of CaMnO3 ceramics

Author

Agencia Estatal de Investigación (España), Gobierno de Aragón, Ministerio de Economía y Competitividad (España), European Commission, Universidad de Zaragoza, Ministerio de Ciencia, Innovación y Universidades (España), Sotelo, Andres, Depriester, M., Torres, M. A., Sahraoui, A. H., Madre, M. A., Diez, J. C., Agencia Estatal de Investigación (España), Gobierno de Aragón, Ministerio de Economía y Competitividad (España), European Commission, Universidad de Zaragoza, Ministerio de Ciencia, Innovación y Universidades (España), Sotelo, Andres, Depriester, M., Torres, M. A., Sahraoui, A. H., Madre, M. A., and Diez, J. C.

Abstract

CaMnO3-based materials are very attractive among n-type thermoelectric oxides for high-temperature applications when they are appropriately doped. The main drawback of these materials is the cost associated to the necessary rare earth cations. This work aims decreasing the amount of these materials through a partial substitution of Ca2+ by an equimolar mixture of K+ and Yb3+, Ca1-x(K0.5Yb0.5)xMnO3, with x = 0.05, 0.10, 0.15, and 0.20. XRD studies have confirmed that the thermoelectric phase is the major one in all samples. Microstructure has shown the formation of large crystals, and an increasing porosity when the substitution is raised. This evolution has been confirmed through density measurements. Electrical resistivity has been drastically decreased for the 0.10 substituted samples, compared with the 0.05 ones, slightly increasing for higher substitution. On the other hand, absolute Seebeck coefficient and thermal conductivity are lower when the substitution is raised. The best ZT values have been achieved for the 0.10 substituted samples, which are around the typical reported in the literature for higher doping level. These results clearly point out to a decrease of the necessary rare earth dopant content to achieve similar performances in CaMnO3 ceramics, which is of the main economic significance for their industrial production.

Published
2018

323. Trait-dependent distributional shifts in fruiting of common British fungi

Author

Gange, A.C., Heegaard, E., Boddy, L., Andrew, Carrie, Kirk, P.M., Halvorsen, R., Kuijper, T.W., Bässler, C., Diez, J., Heilman-Clausen, J., Høiland, K., Büntgen, U., Kauserud, H., Gange, A.C., Heegaard, E., Boddy, L., Andrew, Carrie, Kirk, P.M., Halvorsen, R., Kuijper, T.W., Bässler, C., Diez, J., Heilman-Clausen, J., Høiland, K., Büntgen, U., and Kauserud, H.

Abstract

Despite the dramatic phenological responses of fungal fruiting to recent climate warming, it is unknown whether spatial distributions of fungi have changed and to what extent such changes are influenced by fungal traits, such as ectomycorrhizal (ECM) or saprotrophic lifestyles, spore characteristics, or fruit body size. Our overall aim was to understand how climate and fungal traits determine whether and how species-specific fungal fruit body abundances have shifted across latitudes over time, using the UK national database of fruiting records. The data employed were recorded over 45 yr (1970-2014), and include 853 278 records of Agaricales, Boletales and Russulales, though we focus only on the most common species (with more than 3000 records each). The georeferenced observations were analysed by a Bayesian inference as a Gaussian additive model with a specification following a joint species distribution model. We used an offset, random contributions and fixed effects to isolate different potential biases from the trait-specific interactions with latitude/climate and time. Our main aim was assessed by examination of the three-way-interaction of trait, predictor (latitude or climate) and time. The results show a strong trait-specific shift in latitudinal abundance through time, as ECM species have become more abundant relative to saprotrophic species in the north. Along precipitation gradients, phenology was important, in that species with shorter fruiting seasons have declined markedly in abundance in oceanic regions, whereas species with longer seasons have become relatively more common overall. These changes in fruit body distributions are correlated with temperature and rainfall, which act directly on both saprotrophic and ECM fungi, and also indirectly on ECM fungi, through altered photosynthate allocation from their hosts. If these distributional changes reflect fungal activity, there will be important consequences for the responses of forest ecosystems to chan

Published
2018

325. Atelectasias redondas

Author

Jara Chinarro, B., de Miguel Díez, J., Abad Santamaría, N., López Vime, R., Juretschke Moragues, M.A., and Gómez Santos, D.

Published
2001
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326. Exploring the interior of cuticles and compressions of fossil plants by FIB-SEM milling and image microscopy

Author

Sender Palomar, Luis Miguel, Escapa, Ignacio Hernán, Benedetti, A., Cúneo, Néstor Rubén, and Diez, J. B.

Subjects
FIB, MEB, FOSSIL PLANT COMPRESSIONS, Meteorología y Ciencias Atmosféricas, FOSSIL PLANT CUTICLES, CIENCIAS NATURALES Y EXACTAS, Ciencias de la Tierra y relacionadas con el Medio Ambiente
Abstract

We present the first study of cuticles and compressions of fossilleaves by Focused Ion Beam Scanning Electron Microscopy(FIB-SEM). Cavities preserved inside fossil leaf compressionscorresponding to substomatal chambers have been observedfor the first time and several new features were identified in thecross-section cuts. These results open a new way in the investigationof the three-dimensional structures of both micro- andnanostructural features of fossil plants. Moreover, the applicationof the FIB-SEM technique to both fossils and extant plantremains represent a new source of taxonomical, palaeoenvironmentaland palaeoclimatic information. Fil: Sender Palomar, Luis Miguel. Universidad de Zaragoza; España Fil: Escapa, Ignacio Hernán. Museo Paleontologico Egidio Feruglio; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Benedetti, A.. Universidad de Vigo; España Fil: Cúneo, Néstor Rubén. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Museo Paleontologico Egidio Feruglio; Argentina Fil: Diez, J. B.. Universidad de Vigo; España

Published
2017

327. Remarks on the improvement of performances in thermoelectric oxides

Author

Sotelo, A., Costa, F. M., Ferreira, N. M., Torres, M. A., Madre, M. A., Diez, J. C., and Özçelik, B.

Abstract

Resumen del trabajo presentado a la International Conference on Condensed Matter and Materials Science (ICCMMS), celebrada en Adana (Turquia) del 11 al 15 de octubre de 2017., Thermoelectric (TE) harvesting of wasted heat should play an important role in a sustainable future, due to its simplicity, scalability, and self-sustainability in all kind of applications: remote/attended or mobile/static ones. The development of oxide-based TE materials is important when considering that they are cheaper, and possess lower toxicity than the traditional ones. Moreover, oxides can be used at high temperatures without protecting atmospheres, opening new opportunities for energy recovering TE devices. On the other hand, it is desirable to tune up their TE performances before integration in practical applications. In this work, some insights on the p-type CoO-based materials will be presented, making a special emphasis on their practical applications. Moreover, the exploitation of structural, microstructural, and chemical features of these materials to improve their performances will be highlighted. Among these typical possibilities, the effect of synthesis methods, doping, and texturing, will be presented. Furthermore, other newly developed methods applied with great success will be mentioned. Finally, these techniques and improvements will be evaluated through their possible massive applications.

Published
2017

328. Improving thermoelectric oxides performances

Author

Sotelo, A., Costa, F. M., Ferreira, N. M., Torres, M. A., Kovalevsky, A. V., Madre, M. A., and Diez, J. C.

Abstract

Resumen del trabajo presentado al 1st Iberian Thermoelectric Workshop (ITW), celebrado en Oporto (Portugal) los dias 7 y 8 de septiembre de 2017., It is expected that thermoelectric (TE) harvesting of wasted heat will play an important role among the developed technologies for a sustainable future, due to its inherent operational simplicity, excellent scalability, and selfsustainability in all kind of applications: remote/attended or mobile/static ones. The development of oxide TE materials is of the main importance, as they are cheaper, and less toxic than the materials used in the traditional TE modules. On the other hand, oxides can be used at high temperature without the need of protecting atmospheres, opening new opportunities for the energy recovering TE devices. On the other hand, it is desirable to achieve higher TE performances in these materials before using them in practical applications. In the last years one of the main activities of our group has been centered in developing and improving TE performances in p- and, more recently, n-type TE materials. These improvements have been performed via different synthesis, doping, and/or conformation processes obtaining, in some cases, the highest performances achieved in these materials so far. In this work, some examples of succeeding techniques, with the main focus in their future industrial application, will be presented. Among these techniques, the associated to synthesis, doping, texturing, and forming will be mentioned, as wel as other with great success in other ceramic materials, adapted to thermoelectrics.

Published
2017

329. High temperature stability of textured bi2Ba2Co2Ox rods

Author

Diez, J. C., Madre, M. A., Torres, M. A., Rasekh, Sh., and Sotelo, A.

Abstract

Resumen del trabajo presentado al 1st Iberian Thermoelectric Workshop (ITW), celebrado en Oporto (Portugal) los dias 7 y 8 de septiembre de 2017., Nowdays most of TE devices are based on alloys and/or intermetallic thermoelectric materials such as Bi2Te3 or CoSb3, with high thermoelectric performances at relatively low temperatures. On the other hand, these materials can be oxidized and/or degraded at high temperatures under air and/or release toxic or heavy elements. Consequently, their application range is limited to relatively low temperatures. These temperature limitations were overtaken by the discovery of large thermoelectric properties in NaxCoO2 compound. Since this time, great efforts have been made in the study of CoO-based materials, such as Ca-Co-O and Bi-AE-Co-O (AE = Ca, Sr, Ba), with attractive TE properties. The crystal structure of these oxides is composed of an alternate stacking of two different layers: a common conductive CdI2-type CoO2 layer with a two-dimensional triangular lattice, and a block one composed of insulating rock-salt-type (RS) layers. Both sublattices (RS block and CdI2-type CoO2 layer) possess common a- and c-axis lattice parameters and β angles, but different b-axis length, causing a misfit along the b-direction. Consequently, these materials show a very important crystallographic anisotropy which influences their electrical properties. To overcome this problem, the alignment of grains along their conducting planes is usually used to obtain bulk textured materials with improved TE properties. In this work, Bi2Ba2Co2Ox thermoelectric ceramics have been directionally grown from the melt using the laser floating zone method, followed by a thermal treatment at 700 °C under air between 0 and 1532 h. The microstructural, thermoelectric, and mechanical properties were evaluated as a function of the thermal treatment length. Microstructure has shown that as-grown samples are composed of thermoelectric grains, together with a relatively high amount of secondary phases. Thermal treatment decreased the number and amount of secondary phases, producing nearly single-phase samples after 384 h. Consequently, the thermoelectric properties evaluated through the power factor showed a slight increase with the thermal treatment length, mainly due to the decrease of electrical resistivity, while the Seebeck coefficient was nearly unchanged. On the other hand, flexural strength was practically constant after 24 h thermal treatment. Therefore, these samples can be regarded as very attractive candidates for practical energy generation applications at high temperatures under air.

Published
2017

330. Thermoelectric oxides processed by a laser floating zone technique

Author

Ferreira, N. M., Rasekh, Sh., Kovalevsky, A. V., Costa, F. M., Madre, M. A., Diez, J. C., and Sotelo, A.

Abstract

Resumen del trabajo presentado a la 11th International Conference on Advanced Materials & Processing, celebrada en Edimburgo (Escocia) del 7 al 8 de septiembre de 2017., Oxide ceramics are very promising materials for new thermoelectric devices, as they exhibit high Seebeck coefficient and could present relatively low electrical resistivity, as well as high chemical stability at high temperatures. They show anisotropic thermoelectric properties linked to their layered structures. Therefore, texturing methods developing oriented grains, such as grain growth processes ha ve already shown their applicability to this kind and similar compounds. Among these methods, the laser floating zone (LFZ) melting technique has been found to be very promising to tune up the performances of these compounds, especially in the Co-oxide based materials studied in the last years in our laboratories. In this work, sorne examples highlighting the versatility and usefulness of LFZ technique and the improvements on the thermoelectric performances of textured materials will be shown. This technique allows obtaining very dense, and well textured thermoelectric composite materials. In spite of the well-known incongruent solidification of this family of materials, the as-grown samples possess high thermoelectric properties which can be further enhanced by an adequate annealing procedure, leading to nearly single phase materials. These microstructural modifications produce an important improvement of power factor when compared with materials prepared through conventional techniques. Moreover, this processing technique also shows good prospects to be applied in modules construction.

Published
2017

331. Relationship between method of anastomosis and anastomotic failure after right hemicolectomy and ileo-caecal resection : an international snapshot audit

Author

Pinkney, T., Battersby, N., Bhangu, A., Chaudhri, S., El-Hussuna, A., Frasson, M., Nepogodiev, D., Singh, B., Vennix, S., Zmora, O., Altomare, D., Bemelman, W., Christensen, P., D'Hoore, A., Laurberg, S., Morton, D., Rubbini, M., Vaizey, C., Magill, L., Perry, R., Sheward, N., Ives, N., Mehta, S., Cillo, M., Estefania, D., Patron Uriburu, J., Ruiz, H., Salomon, M., Makhmudov, A., Selnyahina, L., Varabei, A., Vizhynis, Y., Claeys, D., Defoort, B., Muysoms, F., Pletinckx, P., Vergucht, V., Debergh, I., Feryn, T., Reusens, H., Nachtergaele, M., Francart, D., Jehaes, C., Markiewicz, S., Monami, B., Weerts, J., Bouckaert, W., Houben, Bert, Knol, Joep, Sergeant, Gregory, Vangertruyden, G., Haeck, L., Lange, C., Sommeling, C., Vindevoghel, K., Castro, S., De Bruyn, H., Huyghe, M., De Wolf, E., Reynders, D., van Overstraeten, A. de Buck, Wolthuis, A., Delibegovic, S., Christiani, A., Marchiori, M., Jr., Rocha de Moraes, C., Tercioti, V., Jr., Arabadjieva, E., Bulanov, D., Dardanov, D., Stoyanov, V., Yonkov, A., Angelov, K., Maslyankov, S., Sokolov, M., Todorov, G., Toshev, S., Georgiev, Y., Karashmalakov, A., Zafirov, G., Wang, X., Condic, D., Kraljik, D., Mrkovic, H., Pavkovic, V., Raguz, K., Bencurik, V., Holaskova, E., Skrovina, M., Farkasova, M., Grolich, T., Kala, Z., Antos, F., Pruchova, V., Sotona, O., Chobola, M., Dusek, T., Ferko, A., Orhalmi, J., Hoch, J., Kocian, P., Martinek, L., Bernstein, I., Sunesen, K. Gotschalck, Leunbach, J., Thorlacius-Ussing, O., Oveson, A. Uth, Chirstensen, S. Dahl, Gamez, V., Oeting, M., Loeve, U. Schou, Ugianskis, A., Jessen, M., Krarup, P., Linde, K., Mirza, Q., Stovring, J. Overgaard, Erritzoe, L., Jakobsen, H. Loft, Lykke, J., Colov, E. Palmgren, Madsen, A. Husted, Friis, T. Linde, Funder, J. Amstrup, Dich, R., Kjaer, S., Rasmussen, S., Schlesinger, N., Kjaer, M. Dilling, Qvist, N., Khalid, A., Ali, G., Hadi, S., Walker, L. Rosell, Kivela, A., Lehtonen, T., Lepisto, A., Scheinin, T., Siironen, P., Kossi, J., Kuusanmaki, P., Tomminen, T., Turunen, A., Rautio, T., Vierimaa, M., Huhtinen, H., Karvonen, J., Lavonius, M., Rantala, A., Varpe, P., Cotte, E., Francois, Y., Glehen, O., Kepenekian, V., Passot, G., Maggiori, L., Manceau, G., Panis, Y., Gout, M., Rullier, E., van Geluwe, B., Chafai, N., Lefevre, J. H., Parc, Y., Tiret, E., Couette, C., Duchalais, E., Agha, A., Hornberger, M., Hungbauer, A., Iesalnieks, I., Weindl, I., Crescenti, F., Keller, M., Kolodziejski, N., Scherer, R., Sterzing, D., Bock, B., Boehm, G., El-Magd, M., Krones, C., Niewiera, M., Buhr, J., Cordesmeyer, S., Hoffmann, M., Krueckemeier, K., Vogel, T., Schoen, M., Baral, J., Lukoschek, T., Muench, S., Pullig, F., Horisberger, K., Kienle, P., Magdeburg, J., Post, S., Batzalexis, K., Germanos, S., Agalianos, C., Dervenis, C., Gouvas, N., Kanavidis, P., Kottikias, A., Katsoulis, I. E., Korkolis, D., Plataniotis, G., Sakorafas, G., Akrida, I., Argentou, M., Kollatos, C., Lampropoulos, C., Tsochatzis, S., Besznyak, I., Bursics, A., Egyed, T., Papp, G., Svastics, I., Atladottir, J., Moller, P., Sigurdsson, H., Stefansson, T., Valsdottir, E., Andrews, E., Foley, N., Hechtl, D., Majeed, M., McCourt, M., Hanly, A., Hyland, J., Martin, S., O'Connell, P. R., Winter, D., Connelly, T., Joyce, W., Wrafter, P., Berkovitz, R., Avital, S., Yahia, I. Haj, Hermann, N., Shpitz, B., White, I., Lishtzinsky, Y., Tsherniak, A., Wasserberg, N., Horesh, N., Keler, U., Pery, R., Shapiro, R., Tulchinsky, H., Badran, B., Dayan, K., Iskhakov, A., Lecaros, J., Nabih, N., Angrima, I., Bardini, R., Pizzolato, E., Tonello, M., Arces, F., Balestri, R., Ceccarelli, C., Prosperi, V., Rossi, E., Giannini, I., Vincenti, L., Altomare, D. F., Di Candido, F., Di Iena, M., Guglielmi, A., Caputi-Iam-Brenghi, O., Marsanic, P., Mellano, A., Muratore, A., Annecchiarico, M., Bencini, L., Bona-Pasta, S. Amore, Coratti, A., Guerra, F., Asteria, C. R., Boccia, L., Gerard, L., Pascariello, A., Manca, G., Marino, F., Casaril, A., Inama, M., Moretto, G., Bacchelli, C., Carvello, M., Mariani, N., Montorsi, M., Spinelli, A., Romairone, E., Scabini, S., Belli, A., Bianco, F., De Franciscis, S., Romano, G. Maria, Delrio, P., Pace, U., Rega, D., Sassaroli, C., Scala, D., De Luca, R., Ruggieri, E., Elbetti, C., Garzi, A., Romoli, L., Scatizzi, M., Vannucchi, A., Curletti, G., Durante, V., Galleano, R., Mariani, F., Reggiani, L., Bellomo, R., Infantino, A., Franceschilli, L., Sileri, P., Clementi, I., Coletta, D., La Torre, F., Mingoli, A., Velluti, F., Di Giacomo, A., Fiorot, A., Massani, M., Padoan, L., Ruffolo, C., Caruso, S., Franceschini, F., Laessig, R., Monaci, I., Rontini, M., De Nardi, P., Elmore, U., Lemma, M., Rosati, R., Tamburini, A., De Luca, M., Sartori, A., Benevento, A., Bottini, C., Ferrari, C. C., Pata, F., Tessera, G., Pellino, G., Selvaggi, F., Lanzani, A., Romano, F., Sgroi, G., Steccanella, F., Turati, L., Yamamoto, T., Ancans, G., Gerkis, S., Leja, M., Pcolkins, A., Sivins, A., Latkauskas, T., Lizdenis, P., Saladzin-Skas, Z., Svagzdys, S., Tamelis, A., Razbadauskas, A., Sokolovas, M., Dulskas, A., Samalavicius, N., Jotautas, V., Mikalauskas, S., Poskus, E., Poskus, T., Strupas, K., Camenzuli, C., Cini, C., Predrag, A., Psaila, J., Spiteri, N., Buskens, C., de Groof, E. J., Gooszen, J., Tanis, P., Belgers, E., Davids, P., Furnee, E., Postma, E., Pronk, A., Smakman, N., Clermonts, S., Zimmerman, D., Omloo, J., van der Zaag, E., van Duijvendijk, P., Wassenaar, E., Bruijninckx, M., de Graff, E., Doornebosch, P., Tetteroo, G., Vermaas, M., Iordens, G., Knops, S., Toorenvliet, B., van Westereenen, H. L., Boerma, E., Coene, P., van der Harst, E., Van der Pool, A., Raber, M., Melenhorst, J., de Castro, S., Gerhards, M., Arron, M., Bremers, A., de Wilt, H., Ferenschild, F., Yauw, S., Cense, H., Demirkiran, A., Hunfeld, M., Mulder, I., Nonner, J., Swank, H., van Wagensveld, B., Bolmers, M., Briel, J., van Geloven, A., van Rossem, C., Klemann, V., Konsten, J., Leenders, B., Schok, T., Bleeker, W., Brun, M., Helgeland, M., Ignjatovic, D., Oresland, T., Yousefi, P., Backe, I. Faten, Sjo, O. Helmer, Nesbakken, A., Tandberg-Eriksen, M., Cais, A., Traeland, J. Hallvard, Herikstad, R., Korner, H., Lauvland, N., Jajtner, D., Kabiesz, W., Rak, M., Gmerek, L., Horbacka, K., Horst, N., Krokowicz, P., Kwiatkowski, A., Pasnik, K., Karcz, P., Romaniszyn, M., Rusek, T., Walega, P., Czarencki, R., Obuszko, Z., Sitarska, M., Wojciech, W., Zawadzki, M., Amado, S., Clara, P., Couceiro, A., Malaquias, R., Rama, N., Almeida, A., Barbosa, E., Cernadas, E., Duarte, A., Silva, P., Costa, S., Martinez Insua, C., Pereira, J., Pereira, C., Sacchetti, M., Carvalho Pinto, B., Jorge Vieira Sousa, P., Marques, R., Oliveira, A., Cardoso, R., Carlos, S., Corte-Real, J., Moniz Pereira, P., Souto, R., Carneiro, C., Marinho, R., Nunes, V., Rocha, R., Sousa, M., Leite, J., Melo, F., Pimentel, J., Ventura, L., Vila Nova, C., Copacscu, C., Bintintan, V., Ciuce, C., Dindelegan, G., Scurtu, R., Seicean, R., Domansky, N., Karachun, A., Moiseenko, A., Pelipas, Y., Petrov, A., Pravosudov, I., Aiupov, R., Akmalov, Y., Parfenov, A., Suleymanov, N., Tarasov, N., Jumabaev, H., Mamedli, Z., Rasulov, A., Aliev, I., Chernikovskiy, I., Kochnev, V., Komyak, K., Smirnov, A., Achkasov, S., Bolikhov, K., Shelygin, Y., Sushkov, O., Zapolskiy, A., Gvozdenovic, M., Jovanovic, D., Lausevic, Z., Cvetkovic, D., Maravic, M., Milovanovic, B., Stojakovic, N., Tripkovic, I., Mihajlovic, D., Nestorovic, M., Pecic, V., Petrovic, D., Stanojevic, G., Barisic, G., Dimitrijevic, I., Krivokapic, Z., Markovic, V., Popovic, M., Aleksic, A., Dabic, D., Kostic, I., Milojkovic, A., Perunicic, V., Lukic, D., Petrovic, T., Radovanovic, D., Radovanovic, Z., Cuk, V. M., Cuk, V. V., Kenic, M., Kovacevic, B., Krdzic, I., Korcek, J., Rems, M., Toplak, J., Escarra, J., Gil Barrionuevo, M., Golda, T., Kreisler Moreno, E., Zerpa Martin, C., Alvarez Laso, C., Cumplido, P., Padin, H., Baixauli Fons, J., Hernandez-Lizoain, J., Martinez-Ortega, P., Molina-Fernandez, M., Sanchez-Justicia, C., Gracia Solanas, J. Antonio, Diaz de laspra, E. Cordoba, Echazarreta-Gallego, E., Elia-Guedea, M., Ramirez, J., Arredondo Chaves, J., Gonzalez, P. Diez, Elosua, T., Sahagun, J., Turienzo Frade, A., Alvarez Conde, J., Castrillo, E., Diaz Maag, R., Maderuelo, V., Saldarriaga, L., Aldrey Cao, I., Fernandez Varela, X., Nunez Fernandez, S., Parajo Calvo, A., Villar Alvarez, S., Blesa Sierra, I., Lozano, R., Marquez, M., Porcel, O., Menendez, P., Fernandez Hevia, M., Flores Siguenza, L., Jimenez Toscano, M., Lacy Fortuny, A., Ordonez Trujillo, J., Espi, A., Garcia-Botello, S., Martin-Arevalo, J., Moro-Valdezate, D., Pla-Marti, V., Blanco-Antona, F., Abrisqueta, J., Ibanez Canovas, N., Lujan Mompean, J., Escola Ripoll, D., Martinez Gonzalez, S., Parodi, J., Fernandez Lopez, A., Ramos Fernandez, M., Castellvi Valls, J., Ortiz de Zarate, L., Ribas, R., Sabia, D., Viso, L., Alonso Goncalves, S., Gil Egea, M. Jose, Pascual Damieta, M., Pera, M., Salvans Ruiz, S., Bernal, J., Landete, F., Ais, G., Etreros, J., Aguilo Lucia, J., Bosca, A., Deusa, S., Garcia del Cano, J., Viciano, V., Garcia-Armengol, J., Roig, J., Blas, J., Escartin, J., Fatas, J., Fernando, J., Ferrer, R., Arias Pacheco, R., Garcia Florez, L., Moreno Gijon, M., Otero Diez, J., Solar Garcia, L., Aguilar Teixido, F., Balaguer Ojo, C., Bargallo Berzosa, J., Lamas Moure, S., J., Enrique Sierra, Ferminan, A., Herrerias, F., Rufas, M., Vinas, J., Codina-Cazador, A., Farres, R., Gomez, N., Julia, D., Planellas, P., Lopez, J., Luna, A., Maristany, C., Munoz Duyos, A., Puertolas, N., Alcantara Moral, M., Serra-Aracil, X., Concheiro Coello, P., Gomez, D., Carton, C., Miguel, A., Reoyo Pascual, F., Valero Cerrato, X., Zambrano Munoz, R., Cervera-Aldama, J., Gonzalez, J. Garcia, Ramos-Prada, J., Santamaria-Olabarrieta, M., Uriguen-Echeverria, A., Coves Alcover, R., Espinosa Soria, J., Fernandez Rodriguez, E., Hernandis Villalba, J., Maturana Ibanenz, V., De la Torre Gonzalez, F., Huerga, D., Perez Viejo, E., Rivera, A., Ruiz Ucar, E., Garcia-Septiem, J., Jimenez, V., Jimenez Miramon, J., Ramons Rodriquez, J., Rodriguez Alvarez, V., Garcea, A., Ponchietti, L., Borda, N., Enriquez-Navascues, J., Saralegui, Y., Febles Molina, G., Nogues, E., Rodriguez Mendez, A., Roque Castellano, C., Sosa Quesada, Y., Alvarez-Gallego, M., Pascual, I., Rubio-Perez, I., Diaz-San Andres, B., Tone-Villanueva, F., Alonso, J., Cagigas, C., Castillo, J., Gomez, M., Martin-Parra, J., Mengual Ballester, M., Pellicer Franco, E., Soria Aledo, V., Valero Navarro, G., Caballero Rodriguez, E., Gonzalez De Chaves, P., Hernandez, G., Perez Alvarez, A., Soto Sanchez, A., Becerra Garcia, F. Cesar, Alonso Roque, J. Guillermo, Rodriguez Arias, F. Lopez, Del Valle Ruiz, S. R., Sanchez De la Villa, G., Compan, A., Garcia Marin, A., Nofuentes, C., Orts Mico, F., Perez Auladell, V., Carrasco, M., Duque Perez, C., Galvez-Pastor, S., Navarro Garcia, I., Sanchez Perez, A., Enjuto, D., Manuel Bujalance, F., Marcelin, N., Perez, M., Serrano Garcia, R., Cabrera, A., de la Portilla, F., Diaz-Pavon, J., Jimenez-Rodriguez, R., Vazquez-Monchul, J., Daza Gonzalez, J., Gomez Perez, R., Rivera Castellano, J., Roldan de la Rua, J., Errasti Alustiza, J., Fernandez, L., Romeo Ramirez, J., Sardon Ramos, J., Cermeno Toral, B., Alias, D., Garcia-Olmo, D., Guadalajara, H., Herreros, M., Pacheco, P., del Castillo Diez, F., Lima Pinto, F., Martinez Alegre, J., Ortega, I., Nieto Antonio, A. Picardo, Caro, A., Escuder, J., Feliu, F., Millan, M., Alos Company, R., Frangi Caregnato, A., Lozoya Trujillo, R., Rodriguez Carrillo, R., Ruiz Carmona, M., Alonso, N., Ambrona Zafra, D., Ayala Candia, B. Amilka, Bonnin Pascual, J., Pineno Flores, C., Alcazar Montero, J., Angoso Clavijo, M., Garcia, J., Sanchez Tocino, J., Gomez-Alcazar, C., Costa-Navarro, D., Ferri-Romero, J., Rey-Riveiro, M., Romero-Simo, M., Arencibia, B., Esclapez, P., Garcia-Granero, E., Granero, P., Medina Fernandez, F. J., Gallardo Herrera, A. B., Diaz Lopez, C., Navarro Rodriguez, E., Torres Tordera, E., Arenal, J., Citores, M., Marcos, J., Sanchez, J., Tinoco, C., Espin, E., Garcia Granero, A., Jimenez Gomez, L., Sanchez Garcia, J., Vallribera, F., Folkesson, J., Skoldberg, F., Bergman, K., Borgstrom, E., Frey, J., Silfverberg, A., Soderholm, M., Nygren, J., Segelman, J., Gustafsson, D., Lagerqvist, A., Papp, A., Pelczar, M., Abraham-Nordling, M., Ahlberg, M., Sjovall, A., Tengstrom, J., Hagman, K., Chabok, A., Ezra, E., Nikberg, M., Smedh, K., Tiselius, C., Al-Naimi, N., Duc, M. Dao, Meyer, J., Mormont, M., Ris, F., Prevost, G., Villiger, P., Hoffmann, H., Kettelhack, C., Kirchhoff, P., Oertli, D., Weixler, B., Aytac, B., Leventoglu, S., Mentes, B., Yuksel, O., Demirbas, S., Ozkan, B. Busra, Ozbalci, G. Selcuk, Sungurtekin, U., Gulcu, B., Ozturk, E., Yilmazlar, T., Challand, C., Fearnhead, N., Hubbard, R., Kumar, S., Arthur, J., Barben, C., Skaife, P., Slawik, S., Williams, M., Zammit, M., Barker, J., French, J., Sarantitis, I., Slawinski, C., Clifford, R., Eardley, N., Johnson, M., McFaul, C., Vimalachandran, D., Allan, S., Bell, A., Oates, E., Shanmugam, V., Brigic, A., Halls, M., Pucher, P., Stubbs, B., Agarwal, T., Chopada, A., Mallappa, S., Pathmarajah, M., Sugden, C., Brown, C., Macdonald, E., Mckay, A., Richards, J., Robertson, A., Kaushal, M., Patel, P., Tezas, S., Touqan, N., Ayaani, S., Marimuthu, K., Piramanayagam, B., Vourvachis, M., Iqbal, N., Korsgen, S., Seretis, C., Shariff, U., Arnold, S., Chan, H., Clark, E., Fernandes, R., Moran, B., Bajwa, A., McArthur, D., Cao, K., Cunha, P., Pardoe, H., Quddus, A., Theodoropoulou, K., Bolln, C., Denys, G., Gillespie, M., Manimaran, N., Reidy, J., Malik, A. I., Malik, A., Pitt, J., Aryal, K., El-Hadi, A., Lal, R., Pal, A., Velchuru, V., Cunha, M. Oliveira, Thomas, M., Bains, S., Boyle, K., Miller, A., Norwood, M., Yeung, J., Goian, L., Gurjar, S., Saghir, W., Sengupta, N., Stewart-Parker, E., Bailey, S., Khalil, T., Lawes, D., Nikolaou, S., Omar, G., Church, R., Muthiah, B., Garrett, W., Marsh, P., Obeid, N., Chandler, S., Coyne, P., Evans, M., Hunt, L., Lim, J., Oliphant, Z., Papworth, E., Weaver, H., Leon, K. Cuinas, Williams, G., Hernon, J., Kapur, S., Moosvi, R., Shaikh, I., Swafe, L., Aslam, M., Evans, J., Ihedioha, U., Kang, P., Merchant, J., Hompes, R., Middleton, R., Broomfield, A., Crutten-Wood, D., Foster, J., Nash, G., Akhtar, M., Boshnaq, M., Eldesouky, S., Mangam, S., Rabie, M., Ahmed, J., Khan, J., Goh, N. Ming, Shamali, A., Stefan, S., Thompson, C., Amin, A., Docherty, J., Lim, M., Walker, K., Watson, A., Hossack, M., Mackenzie, N., Paraoan, M., Alam, N., Daniels, I., Narang, S., Pathak, S., Smart, N., Al-Qaddo, A., Codd, R., Rutka, O., Bronder, C., Crighton, I., Davies, E., Raymond, T., Bookless, L., Griffiths, B., Plusa, S., Carlson, G., Harrison, R., Lees, N., Mason, C., Quayle, J., Branagan, G., Broadhurst, J., Chave, H., Sleight, S., Awad, F., Cruickshank, N., Joy, H., Boereboom, C., Daliya, P., Dhillon, A., Watson, N., Watson, R., Artioukh, D., Gokul, K., Javed, M., Kong, R., Sutton, J., Faiz, O., Jenkins, I., Leo, C. A., Samaranayake, S. F., Warusavitarne, J., Arya, S., Bhan, C., Mukhtar, H., Oshowo, A., Wilson, J., Duff, S., Fatayer, T., Mbuvi, J., Sharma, A., Cornish, J., Davies, L., Harries, R., Morris, C., Torkington, J., Knight, J., Lai, C., Shihab, O., Tzivanakis, A., Hussain, A., Luke, D., Padwick, R., Torrance, A., Tsiamis, A., Dawson, P., Balfour, A., Brady, R., Mander, J., Paterson, H., Chandratreya, N., Chu, H., Cutting, J., Vernon, S., Ho, C. Wai, Andreani, S., Patel, H., Warner, M., Tan, J. Yan Qi, Gidwani, A., Lawther, R., Loughlin, P., Skelly, B., Spence, R., Iqbal, A., Khan, A., Perrin, K., Raza, A., Tan, S., MUMC+: MA Heelkunde (9), Promovendi PHPC, MUMC+: MA AIOS Heelkunde (9), RS: GROW - R3 - Innovative Cancer Diagnostics & Therapy, (ukupan broj autora: 1112), OMÜ, Battersby, N., Bhangu, A., Chaudhri, S., El-Hussuna, A., Frasson, M., Nepogodiev, D., Singh, B., Vennix, S., Zmora, O., Altomare, D., Bemelman, W., Christensen, P., D'Hoore, A., Laurberg, S., Morton, D., Rubbini, M., Vaizey, C., Magill, L., Perry, R., Sheward, N., Ives, N., Mehta, S., Cillo, M., Estefania, D., Patron Uriburu, J., Ruiz, H., Salomon, M., Makhmudov, A., Selnyahina, L., Varabei, A., Vizhynis, Y., Claeys, D., Defoort, B., Muysoms, F., Pletinckx, P., Vergucht, V., Debergh, I., Feryn, T., Reusens, H., Nachtergaele, M., Francart, D., Jehaes, C., Markiewicz, S., Monami, B., Weerts, J., Bouckaert, W., Houben, B., Knol, J., Sergeant, G., Vangertruyden, G., Haeck, L., Lange, C., Sommeling, C., Vindevoghel, K., Castro, S., De Bruyn, H., Huyghe, M., De Wolf, E., Reynders, D., Wolthuis, A., Delibegovic, S., Christiani, A., Marchiori, M., de Moraes, C. Rocha, Tercioti, V., Arabadjieva, E., Bulanov, D., Dardanov, D., Stoyanov, V., Yonkov, A., Angelov, K., Maslyankov, S., Sokolov, M., Todorov, G., Toshev, S., Georgiev, Y., Karashmalakov, A., Zafirov, G., Wang, X., Condic, D., Kraljik, D., Mrkovic, H., Pavkovic, V., Raguå¾, K., Bencurik, V., Holã¡å¡kovã¡, E., Skrovina, M., Farkaå¡ovã¡, M., Grolich, T., Kala, Z., Antos, F., Pruchova, V., Sotona, O., Chobola, M., Dusek, T., Ferko, A., Örhalmi, J., Hoch, J., Kocian, P., Martinek, L., Bernstein, I., Gotschalck Sunesen, K., Leunbach, J., Thorlacius-Ussing, O., Uth Oveson, A., Dahl Chirstensen, S., Gamez, V., Oeting, M., Schou Loeve, U., Ugianskis, A., Jessen, M., Krarup, P., Linde, K., Mirza, Q., Overgaard Stovring, J., Erritzã¸e, L., Loft Jakobsen, H., Lykke, J., Palmgren Colov, E., Husted Madsen, A., Linde Friis, T., Amstrup Funder, J., Dich, R., Kjã¦r, S., Rasmussen, S., Schlesinger, N., Dilling Kjaer, M., Qvist, N., Khalid, A., Ali, G., Hadi, S., Rosell Walker, L., Kivelã¤, A., Lehtonen, T., Lepistã¶, A., Scheinin, T., Siironen, P., Kã¶ssi, J., Kuusanmã¤ki, P., Tomminen, T., Turunen, A., Rautio, T., Vierimaa, M., Huhtinen, H., Karvonen, J., Lavonius, M., Rantala, A., Varpe, P., Cotte, E., Francois, Y., Glehen, O., Kepenekian, V., Passot, G., Maggiori, L., Manceau, G., Panis, Y., Gout, M., Rullier, E., Chafai, N., Lefevre, J. H., Parc, Y., Tiret, E., Couette, C., Duchalais, E., Agha, A., Hornberger, M., Hungbauer, A., Iesalnieks, I., Weindl, I., Crescenti, F., Keller, M., Kolodziejski, N., Scherer, R., Sterzing, D., Bock, B., Boehm, G., El-Magd, M., Krones, C., Niewiera, M., Buhr, J., Cordesmeyer, S., Hoffmann, M., Krã¼ckemeier, K., Vogel, T., Schã¶n, M., Baral, J., Lukoschek, T., Mã¼nch, S., Pullig, F., Horisberger, K., Kienle, P., Magdeburg, J., Post, S., Batzalexis, K., Germanos, S., Agalianos, C., Dervenis, C., Gouvas, N., Kanavidis, P., Kottikias, A., Katsoulis, I. E., Korkolis, D., Plataniotis, G., Sakorafas, G., Akrida, I., Argentou, M., Kollatos, C., Lampropoulos, C., Tsochatzis, S., Besznyã¡k, I., Bursics, A., Egyed, T., Papp, G., Svastics, I., Atladottir, J., Mã¶ller, P., Sigurdsson, H., Stefã¡nsson, T., Valsdottir, E., Andrews, E., Foley, N., Hechtl, D., Majeed, M., Mccourt, M., Hanly, A., Hyland, J., Martin, S., O'Connell, P. 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M., Cuk, V. V., Kenic, M., Kovacevic, B., Krdzic, I., Korcek, J., Rems, M., Toplak, J., Escarrã¢, J., Gil Barrionuevo, M., Golda, T., Kreisler Moreno, E., Zerpa Martin, C., à lvarez Laso, C., Cumplido, P., Padin, H., Baixauli Fons, J., Hernández-Lizoain, J., Martinez-Ortega, P., Molina-Fernández, M., Sánchez-Justicia, C., Antonio Gracia Solanas, J., de Laspra, E. Córdoba Díaz, Echazarreta-Gallego, E., Elia-Guedea, M., Ramirez, J., Arredondo Chaves, J., Diez González, P., Elosua, T., Sahagãºn, J., Turienzo Frade, A., à lvarez Conde, J., Castrillo, E., Diaz Maag, R., Maderuelo, V., Saldarriaga, L., Aldrey Cao, I., Fernández Varela, X., Núñez Fernández, S., Parajó Calvo, A., Villar à lvarez, S., Blesa Sierra, I., Lozano, R., Mã¡rquez, M., Porcel, O., Menendez, P., Fernández Hevia, M., Flores Sigüenza, L., Jimenez Toscano, M., Lacy Fortuny, A., Ordoñez Trujillo, J., Espi, A., Garcia-Botello, S., Martín-Arévalo, J., Moro-Valdezate, D., Pla-Martí, V., Blanco-Antona, F., Abrisqueta, J., Ibañez Canovas, N., Lujan Mompean, J., Escolá Ripoll, D., Martinez Gonzalez, S., Parodi, J., Fernández López, A., Ramos Fernández, M., Castellvi Valls, J., de Zarate, L. Ortiz, Ribas, R., Sabia, D., Viso, L., Alonso Gonçalves, S., José Gil Egea, M., Pascual Damieta, M., Pera, M., Salvans Ruiz, S., Bernal, J., Landete, F., Ais, G., Etreros, J., Aguiló Lucia, J., Boscã¡, A., Deusa, S., García del Caño, J., Viciano, V., García-Armengol, J., Roig, J., Blas, J., Escartin, J., Fatã¡s, J., Fernando, J., Ferrer, R., Arias Pacheco, R., García Flórez, L., Moreno Gijón, M., Otero Díez, J., Solar Garcia, L., Aguilar Teixido, F., Balaguer Ojo, C., Bargallo Berzosa, J., Lamas Moure, S., Enrique Sierra, J., Fermiã±ã¡n, A., Herrerias, F., Rufas, M., Viã±as, J., Codina-Cazador, A., Farrã©s, R., Gã³mez, N., Juliã , D., Planellas, P., Lã³pez, J., Luna, A., Maristany, C., Muñoz Duyos, A., Puã©rtolas, N., Alcantara Moral, M., Serra-Aracil, X., Concheiro Coello, P., Gã³mez, D., Carton, C., Miguel, A., Reoyo Pascual, F., Valero Cerrato, X., Zambrano Muñoz, R., Cervera-Aldama, J., García González, J., Ramos-Prada, J., Santamaría-Olabarrieta, M., Urigüen-Echeverría, A., Coves Alcover, R., Espinosa Soria, J., Fernandez Rodriguez, E., Hernandis Villalba, J., Maturana Ibañez, V., De la Torre Gonzalez, F., Huerga, D., Pérez Viejo, E., Rivera, A., Ruiz Ucar, E., Garcia-Septiem, J., Jimã©nez, V., Jiménez Miramón, J., Ramons Rodriquez, J., Rodriguez Alvarez, V., Garcea, A., Ponchietti, L., Borda, N., Enriquez-Navascues, J., Saralegui, Y., Febles Molina, G., Nogues, E., Rodríguez Méndez, Ã. ., Roque Castellano, C., Sosa Quesada, Y., Alvarez-Gallego, M., Pascual, I., Rubio-Perez, I., Diaz-San Andrés, B., Tone-Villanueva, F., Alonso, J., Cagigas, C., Castillo, J., Gã³mez, M., Martín-Parra, J., Mengual Ballester, M., Pellicer Franco, E., Soria Aledo, V., Valero Navarro, G., Caballero Rodríguez, E., De Chaves, P. Gonzalez, Hernandez, G., Perez Alvarez, A., Soto Sanchez, A., Cesar Becerra Garcia, F., Guillermo Alonso Roque, J., López Rodríguez Arias, F., Del Valle Ruiz, S. R., De La Villa, G. Sánchez, Compaã±, A., García Marín, A., Nofuentes, C., Orts Micó, F., Pérez Auladell, V., Carrasco, M., Duque Perez, C., Gálvez-Pastor, S., Navarro Garcia, I., Sanchez Perez, A., Enjuto, D., Manuel Bujalance, F., Marcelin, N., Pã©rez, M., Serrano García, R., Cabrera, A., de la Portilla, F., Diaz-Pavon, J., Jimenez-Rodriguez, R., Vazquez-Monchul, J., Daza González, J., Gómez Pérez, R., Rivera Castellano, J., de la Rua, J. Roldán, Errasti Alustiza, J., Fernandez, L., Romeo Ramirez, J., Sardon Ramos, J., Cermeño Toral, B., Alias, D., Garcia-Olmo, D., Guadalajara, H., Herreros, M., Pacheco, P., Lima, P., Martínez Alegre, J., Ortega, I., Picardo Nieto Antonio, A., Caro, A., Escuder, J., Feliu, F., Millan, M., Frangi Caregnato, A., Lozoya Trujillo, R., Rodríguez Carrillo, R., Ruiz Carmona, M., Alonso, N., Ambrona Zafra, D., Amilka Ayala Candia, B. J., Pineño Flores, C., Alcazar Montero, J., Angoso Clavijo, M., Garcia, J., Sanchez Tocino, J., Gómez-Alcazar, C., Costa-Navarro, D., Ferri-Romero, J., Rey-Riveiro, M., Romero-Simó, M., Arencibia, B., Esclapez, P., García-Granero, E., Granero, P., Medina Fernández, F. J., Gallardo Herrera, A. B., Diaz López, C., Navarro Rodriguez, E., Torres Tordera, E., Arenal, J., Citores, M., Marcos, J., Sã¡nchez, J., Tinoco, C., Espin, E., Garcia Granero, A., Jimenez Gomez, L., Sanchez Garcia, J., Vallribera, F., Folkesson, J., Skã¶ldberg, F., Bergman, K., Borgstrã¶m, E., Frey, J., Silfverberg, A., Sã¶derholm, M., Nygren, J., Segelman, J., Gustafsson, D., Lagerqvist, A., Papp, A., Pelczar, M., Abraham-Nordling, M., Ahlberg, M., Sjovall, A., Tengstrom, J., Hagman, K., Chabok, A., Ezra, E., Nikberg, M., Smedh, K., Tiselius, C., Al-Naimi, N., Dao Duc, M., Meyer, J., Mormont, M., Ris, F., Prevost, G., Villiger, P., Hoffmann, H., Kettelhack, C., Kirchhoff, P., Oertli, D., Weixler, B., Aytac, B., Leventoglu, S., Mentes, B., Yuksel, O., Demirbas, S., Busra Ozkan, B., Selçuk Özbalci, G., Sungurtekin, U., Gã¼lcã¼, B., Ozturk, E., Yilmazlar, T., Challand, C., Fearnhead, N., Hubbard, R., Kumar, S., Arthur, J., Barben, C., Skaife, P., Slawik, S., Williams, M., Zammit, M., Barker, J., Sarantitis, I., Slawinski, C., Clifford, R., Eardley, N., Johnson, M., Mcfaul, C., Vimalachandran, D., Allan, S., Bell, A., Oates, E., Shanmugam, V., Brigic, A., Halls, M., Pucher, P., Stubbs, B., Agarwal, T., Chopada, A., Mallappa, S., Pathmarajah, M., Sugden, C., Brown, C., Macdonald, E., Mckay, A., Richards, J., Robertson, A., Kaushal, M., Patel, P., Tezas, S., Touqan, N., Ayaani, S., Marimuthu, K., Piramanayagam, B., Vourvachis, M., Iqbal, N., Korsgen, S., Seretis, C., Shariff, U., Arnold, S., Chan, H., Clark, E., Fernandes, R., Moran, B., Bajwa, A., Mcarthur, D., Cao, K., Cunha, P., Pardoe, H., Quddus, A., Theodoropoulou, K., Bolln, C., Denys, G., Gillespie, M., Manimaran, N., Reidy, J., Malik, A. I., Malik, A., Pitt, J., Aryal, K., El-Hadi, A., Lal, R., Pal, A., Velchuru, V., Oliveira Cunha, M., Thomas, M., Bains, S., Boyle, K., Miller, A., Norwood, M., Yeung, J., Goian, L., Gurjar, S., Saghir, W., Sengupta, N., Stewart-Parker, E., Bailey, S., Khalil, T., Lawes, D., Nikolaou, S., Omar, G., Church, R., Muthiah, B., Garrett, W., Marsh, P., Obeid, N., Chandler, S., Coyne, P., Evans, M., Hunt, L., Lim, J., Oliphant, Z., Papworth, E., Weaver, H., Cuiñas Leon, K., Williams, G., Hernon, J., Kapur, S., Moosvi, R., Shaikh, I., Swafe, L., Aslam, M., Evans, J., Ihedioha, U., Kang, P., Merchant, J., Hompes, R., Middleton, R., Broomfield, A., Crutten-Wood, D., Foster, J., Nash, G., Akhtar, M., Boshnaq, M., Eldesouky, S., Mangam, S., Rabie, M., Ahmed, J., Khan, J., Ming Goh, N., Shamali, A., Stefan, S., Thompson, C., Amin, A., Docherty, J., Lim, M., Walker, K., Watson, A., Hossack, M., Mackenzie, N., Paraoan, M., Alam, N., Daniels, I., Narang, S., Pathak, S., Smart, N., Al-Qaddo, A., Codd, R., Rutka, O., Bronder, C., Crighton, I., Davies, E., Raymond, T., Bookless, L., Griffiths, B., Plusa, S., Carlson, G., Harrison, R., Lees, N., Mason, C., Quayle, J., Branagan, G., Broadhurst, J., Chave, H., Sleight, S., Awad, F., Cruickshank, N., Joy, H., Boereboom, C., Daliya, P., Dhillon, A., Watson, N., Watson, R., Artioukh, D., Gokul, K., Javed, M., Kong, R., Sutton, J., Faiz, O., Jenkins, I., Leo, C. A., Samaranayake, S. F., Warusavitarne, J., Arya, S., Bhan, C., Mukhtar, H., Oshowo, A., Wilson, J., Duff, S., Fatayer, T., Mbuvi, J., Sharma, A., Cornish, J., Davies, L., Harries, R., Morris, C., Torkington, J., Knight, J., Lai, C., Shihab, O., Tzivanakis, A., Hussain, A., Luke, D., Padwick, R., Torrance, A., Tsiamis, A., Dawson, P., Balfour, A., Brady, R., Mander, J., Paterson, H., Chandratreya, N., Chu, H., Cutting, J., Vernon, S., Wai Ho, C., Andreani, S., Patel, H., Yan Qi Tan, J., Iqbal, A., Khan, A., Perrin, K., Raza, A., Tan, S., Other departments, AGEM - Amsterdam Gastroenterology Endocrinology Metabolism, CCA - Cancer Treatment and Quality of Life, Surgery, Meyer, Jérémy, Al-Naimi, Noof, Mormont, Murielle, Ris, Frédéric, 2015 European Society of Coloproctology collaborating, Group, Rosati, R, Sileri, P, and Radiology and nuclear medicine

Subjects
medicine.medical_specialty, Leak, SURGERY, colorectal cancer, Audit, 030230 surgery, Anastomosis, Logistic regression, NO, Resection, 03 medical and health sciences, Tumours of the digestive tract Radboud Institute for Health Sciences [Radboudumc 14], 0302 clinical medicine, Primary outcome, All institutes and research themes of the Radboud University Medical Center, Anastomotic leak, colorectal cancer, Crohn's disease, epidemiology, international, Journal Article, Medicine, Anastomotic leak, LEAK, COMPLICATIONS, ddc:617, business.industry, MORTALITY, Gastroenterology, Crohns disease, anastomotic leak, crohn's disease, epidemiology, international, ta3121, 3. Good health, Surgery, Reconstructive and regenerative medicine Radboud Institute for Health Sciences [Radboudumc 10], Crohn's disease, DEFINITION, 030220 oncology & carcinogenesis, Mixed effects, RISK-FACTORS, business, Right hemicolectomy
Abstract

Aim The anastomosis technique used following right-sided colonic resection is widely variable and may affect patient outcome. This study aimed to assess the association between leak and anastomosis technique (stapled vs handsewn)., Method This was a prospective, multicentre, international audit including patients undergoing elective or emergency right hemicolectomy or ileo-caecal resection operations over a 2-month period in early 2015. The primary outcome measure was the presence of anastomotic leak within 30 days of surgery, determined using a prespecified definition. Mixed effects logistic regression models were used to assess the association between leak and anastomosis method, adjusting for patient, disease and operative cofactors, with centre included as a random-effect variable., Results This study included 3208 patients, of whom 78.4% (n = 2515) underwent surgery for malignancy and 11.7% (n = 375) underwent surgery for Crohn's disease. An anastomosis was performed in 94.8% (n = 3041) of patients, which was handsewn in 38.9% (n = 1183) and stapled in 61.1% (n = 1858). Patients undergoing hand-sewn anastomosis were more likely to be emergency admissions (20.5% handsewn vs 12.9% stapled) and to undergo open surgery (54.7% handsewn vs 36.6% stapled). The overall anastomotic leak rate was 8.1% (245/3041), which was similar following handsewn (7.4%) and stapled (8.5%) techniques (P = 0.3). After adjustment for cofactors, the odds of a leak were higher for stapled anastomosis (adjusted OR = 1.43; 95% CI: 1.04-1.95; P = 0.03)., Conclusion Despite being used in lower-risk patients, stapled anastomosis was associated with an increased anastomotic leak rate in this observational study. Further research is needed to define patient groups in whom a stapled anastomosis is safe.

Published
2017

332. Physical properties of Cr doped Bi2SRrCa1Cu2-xCrxOy (Bi-2212) superconductors prepared by laser floating zone technique

Author

Gün, Esen, Özkurt, B., Madre, M. A., Sotelo, A., Diez, J. C., and Özçelik, B.

Abstract

Resumen del trabajo presentado a la International Conference on Condensed Matter and Materials Science (ICCMMS), celebrada en Adana (Turquia) del 11 al 15 de octubre de 2017., The effect of Cr substitution for Cu on the properties of LFZ grown Bi-2212 ceramics at 15mm/h has been investigated. Samples have been characterized using X-ray powder diffraction (XRD), scanning electron microscopy (SEM), and DC electrical resistivity measurements.X-ray diffraction studies have shown that the XRD peak intensities of sample B at some peak positions increase, implying that it possess higher crystallinity from other samples. It has been observed that Tc (offset) values are significantly affected by Cr contents. The highest Tc (onset) and Tc (offset) values have been obtained for sample B, suggesting that low Cr doping favours the formation of strong links between grains.

Published
2017

333. Incidencia de nefropatía inducida por contraste tras una tomografía computarizada

Author

Barrios López, A., García Martínez, F., Rodríguez, J.I., Montero-San-Martín, B., Gómez Rioja, R., Diez, J., and Martín-Hervás, C.

Abstract

Nefropatía inducida por contraste (NIC) es el deterioro agudo de la función renal tras la administración intravascular de contraste yodado. Nuestros objetivos son estimar la incidencia de NIC y analizar la evolucion de distintos biomarcadores de funcion renal, en pacientes tras una tomografía computarizada (TC) con contraste yodado intravenoso (CIV) y premedicación (hidratación oral y N-acetilcisteína).

Published
2021
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345. Atmosphere–vegetation–soil interactions in a climate change context; impact of changing conditions on engineered transport infrastructure slopes in Europe

Author

Tang, A. M., primary, Hughes, P. N., additional, Dijkstra, T. A., additional, Askarinejad, A., additional, Brenčič, M., additional, Cui, Y. J., additional, Diez, J. J., additional, Firgi, T., additional, Gajewska, B., additional, Gentile, F., additional, Grossi, G., additional, Jommi, C., additional, Kehagia, F., additional, Koda, E., additional, ter Maat, H. W., additional, Lenart, S., additional, Lourenco, S., additional, Oliveira, M., additional, Osinski, P., additional, Springman, S. M., additional, Stirling, R., additional, Toll, D. G., additional, and Van Beek, V., additional

Published
2018
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349. New strategies for heart failure with preserved ejection fraction: the importance of targeted therapies for heart failure phenotypes

Author

Senni, M, Paulus, W, Gavazzi, A, Fraser, A, Diez, J, Solomon, S, Smiseth, O, Guazzi, M, Lam, C, Maggioni, A, Tschope, C, Metra, M, Hummel, S, Edelmann, F, Ambrosio, G, Coats, A, Filippatos, G, Gheorghiade, M, Anker, S, Levy, D, Pfeffer, M, Stough, W, Pieske, B, Senni M, Paulus WJ, Gavazzi A, Fraser AG, Diez J, Solomon SD, Smiseth OA, Guazzi M, Lam CSP, Maggioni AP, Tschope C, Metra M, Hummel SL, Edelmann F, Ambrosio G, Coats AJS, Filippatos GS, Gheorghiade M, Anker SD, Levy D, Pfeffer MA, Stough WG, Pieske BM, Senni, M, Paulus, W, Gavazzi, A, Fraser, A, Diez, J, Solomon, S, Smiseth, O, Guazzi, M, Lam, C, Maggioni, A, Tschope, C, Metra, M, Hummel, S, Edelmann, F, Ambrosio, G, Coats, A, Filippatos, G, Gheorghiade, M, Anker, S, Levy, D, Pfeffer, M, Stough, W, Pieske, B, Senni M, Paulus WJ, Gavazzi A, Fraser AG, Diez J, Solomon SD, Smiseth OA, Guazzi M, Lam CSP, Maggioni AP, Tschope C, Metra M, Hummel SL, Edelmann F, Ambrosio G, Coats AJS, Filippatos GS, Gheorghiade M, Anker SD, Levy D, Pfeffer MA, Stough WG, and Pieske BM

Abstract

The management of heart failure with reduced ejection fraction (HF-REF) has improved significantly over the last two decades. In contrast, little or no progress has been made in identifying evidence-based, effective treatments for heart failure with preserved ejection fraction (HF-PEF). Despite the high prevalence, mortality, and cost of HF-PEF, large phase III international clinical trials investigating interventions to improve outcomes in HF-PEF have yielded disappointing results. Therefore, treatment of HF-PEF remains largely empiric, and almost no acknowledged standards exist. There is no single explanation for the negative results of past HF-PEF trials. Potential contributors include an incomplete understanding of HF-PEF pathophysiology, the heterogeneity of the patient population, inadequate diagnostic criteria, recruitment of patients without true heart failure or at early stages of the syndrome, poor matching of therapeutic mechanisms and primary pathophysiological processes, suboptimal study designs, or inadequate statistical power. Many novel agents are in various stages of research and development for potential use in patients with HF-PEF. To maximize the likelihood of identifying effective therapeutics for HF-PEF, lessons learned from the past decade of research should be applied to the design, conduct, and interpretation of future trials. This paper represents a synthesis of a workshop held in Bergamo, Italy, and it examines new and emerging therapies in the context of specific, targeted HF-PEF phenotypes where positive clinical benefit may be detected in clinical trials. Specific considerations related to patient and endpoint selection for future clinical trials design are also discussed.

Published
2014

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