274 results on '"M. Endler"'
Search Results
152. [Experiences with a new questionnaire for preoperative evaluation of female urinary incontinence (author's transl)]
- Author
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P, Riss, R, Spernol, and M, Endler
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Diagnosis, Differential ,Male ,Urinary Incontinence ,Urethra ,Urinary Incontinence, Stress ,Humans ,Female ,Middle Aged ,Urinary Bladder, Neurogenic - Abstract
A new questionnaire with an urge-score and stress-score described by Gaudenz was put before 90 incontinent women scheduled to undergo vaginal repair. In addition to the history cystometry and simultaneous urethral pressure profilometry was done. According to the questionnaire 70 patients had evidence of stress-incontinence and 20 patients of urge-incontinence. A good correlation was found with the results of the urodynamic evaluation. The score does not reflect the severity of urinary incontinence. In patients with symptoms of both stress- and urge-incontinence the score emphasizes urge-incontinence. When a urodynamic work-up is not possible the questionnaire with the urge-score and stress-score is a very helpful tool for differentiating between stress- and urge-incontinence.
- Published
- 1981
153. [Indications and results of osteotomy of the pelvis using Chiari's method in advanced arthrosis]
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K, Chiari, M, Endler, and H, Hackel
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Adult ,Rotation ,Humans ,Female ,Hip Joint ,Femur ,Bone Diseases ,Joint Diseases ,Pelvic Bones ,Follow-Up Studies ,Osteotomy - Published
- 1978
154. Anomalous median nerve and an anomalous muscle belly of the first lumbrical associated with carpal-tunnel syndrome
- Author
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R J, Schultz, P M, Endler, and H D, Huddleston
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Male ,Muscles ,Humans ,Hand ,Carpal Tunnel Syndrome ,Aged ,Median Nerve - Published
- 1973
155. Scenario with combined density and heating control to reduce the impact of the bootstrap current in Wendelstein 7-X.
- Author
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P. Sinha, D. Böckenhoff, M. Endler, J. Geiger, H. Hölbe, H.M. Smith, T.S. Pedersen, Y. Turkin, and Team, W7-X
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HEATING control ,PLASMA boundary layers ,POWER density ,DENSITY ,PROOF of concept ,HEAT recovery - Abstract
Wendelstein 7-X is a low-shear stellarator with an island divertor, formed by natural magnetic islands at the plasma edge and ten modular divertor units for particle and energy exhaust. For the island divertor concept to work properly, the device is optimized for small internal currents. In particular, the bootstrap current is minimized. Previous studies predicted a thermal overload of the targets at a particular location, due to the slow evolution of the toroidal net current in the initial phase of certain otherwise desirable high-power discharges. The present numerical study explores the neoclassical predictions for the bootstrap current in more detail and demonstrates, as a proof of principle, that a path from low density and low heating power to high density and full heating power exists, on which the bootstrap current remains constant. This offers the possibility to reach the predetermined toroidal net current at low heating power, where no overload will occur in the transient phase. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
- View/download PDF
156. Drift effects on W7-X divertor heat and particle fluxes.
- Author
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K C Hammond, Y Gao, M Jakubowski, C Killer, H Niemann, L Rudischhauser, A Ali, T Andreeva, B D Blackwell, K J Brunner, B Cannas, P Drewelow, P Drews, M Endler, Y Feng, J Geiger, O Grulke, J Knauer, S Klose, and S Lazerson
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HEAT flux ,PLASMA flow ,MAGNETIC fields ,ELECTRIC fields ,PLASMA boundary layers ,POLOIDAL magnetic fields - Abstract
Classical particle drifts are known to have substantial impacts on fluxes of particles and heat through the edge plasmas in both tokamaks and stellarators. Here we present results from the first dedicated investigation of drift effects in the W7-X stellarator. By comparing similar plasma discharges conducted with a forward- and reverse-directed magnetic field, the impacts of drifts could be isolated through the observation of up-down asymmetries in flux profiles on the divertor targets. In low-density plasmas, the radial locations of the strike lines (i.e. peaks in the target heat flux profiles) exhibited discrepancies of up to 3 cm that reversed upon magnetic field reversal. In addition, asymmetric heat loads were observed in regions of the target that are shadowed by other targets from parallel flux from the core plasma. A comparison of these asymmetric features with the footprints of key topological regions of the edge magnetic field on the divertor suggests that the main driver of the asymmetries at low density is poloidal E × B drift due to radial electric fields in the scrape-off layer and private flux region. In higher-density plasmas, upper and lower targets collected non-ambipolar currents with opposite signs that also inverted upon field reversal. Overall, in these experiments, almost all up-down asymmetry could be attributed to the field reversal and, therefore, field-dependent drifts. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
- View/download PDF
157. Managing leading edges during assembly of the Wendelstein 7-X divertor.
- Author
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M Endler, J Fellinger, H Hölbe, T Sunn Pedersen, S Bozhenkov, J Geiger, M Grahl, and Team, W7-X
- Subjects
- *
MAGNETIC fields , *HEAT transfer , *PLASMA gases , *MAGNETIC resonance imaging , *X-ray diffraction - Abstract
Divertor target plates of magnetic confinement experiments are usually intersected by the magnetic field under a shallow angle. If steps are present in the target surface, the resulting leading edges will receive a strongly increased heat load as compared with the surrounding target surface. A very precise alignment of the target components is required to limit the height of leading edges in all magnetic configurations. In preparation of the initial divertor operation phase of the Wendelstein 7-X stellarator, we combined a model calculating the thermal load pattern on the targets for each magnetic configuration with a time-dependent model for heat transport within the targets, with a model for carbon sublimation and with measurements of step heights between target components to estimate the carbon sublimation rates to be expected. In a few locations of the as-built and as-installed divertor, these were found to be critically high, such that a limitation of plasma performance might have resulted. By re-aligning one type of target component according to the results of our modelling, the expected carbon sublimation rates were strongly reduced to uncritical levels. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
- View/download PDF
158. Experimental evidence of long-range correlations and self-similarity in plasma fluctuations
- Author
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David E. Newman, E. Sánchez, George McKee, C. Hidalgo, Cristina Riccardi, M. Endler, V. Antoni, R. Balbín, S. Davies, M. A. Pedrosa, Emilio Martines, R. V. Bravenec, G. F. Matthews, B. Ph. van Milligen, Benjamin A. Carreras, I. García-Cortés, J. Bleuel, Carreras, B, van Milligen, B, Pedrosa, M, Balbin, R, Hidalgo, C, Newman, D, Sanchez, E, Bravenec, R, Mckee, G, Garcia Cortes, I, Bleuel, J, Endler, M, Riccardi, C, Davies, S, Matthews, G, Martines, E, and Antoni, V
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Physics ,Tokamak ,Condensed matter physics ,Reversed field pinch ,Autocorrelation ,turbulence ,Plasma ,Condensed Matter Physics ,Power law ,Spectral line ,Computational physics ,law.invention ,FIS/01 - FISICA SPERIMENTALE ,Physics::Plasma Physics ,law ,correlations ,Pinch ,Plasma diagnostics ,magnetoplasma ,FIS/03 - FISICA DELLA MATERIA - Abstract
To better understand long time transport dynamics, techniques to investigate long-range dependences in plasma fluctuations have been applied to data from several confinement devices including tokamaks, stellarators, and reversed field pinch. The results reveal the self-similar character of the edge plasma fluctuations. This implies that the tail of the autocorrelation function decays as a power law and suggests that there is a superdiffusive component of the anomalous transport. Rescaled fluctuation and turbulent flux spectra from different devices also show a strong similarity. For a range of parameters corresponding to the tokamak ohmic regime and equivalent power for other devices, the spectral decay index may show a universal character.
159. Statistical characterization of fluctuation wave forms in the boundary region of fusion and nonfusion plasmas
- Author
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C. Hidalgo, M. A. Pedrosa, E. Sánchez, G. Chiodini, B. van Milligen, Benjamin A. Carreras, David E. Newman, I. García-Cortés, M. Endler, D. López-Bruna, J. Bleuel, R. Balbín, Cristina Riccardi, Sanchez, E, Hidalgo, C, Lopez Bruna, D, Garcia Cortes, I, Balbin, R, Pedrosa, M, van Milligen, B, Riccardi, C, Chiodini, G, Bleuel, J, Endler, M, Carreras, B, and Newman, D
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Coupling ,Physics ,Fusion ,Tokamak ,fluctuations ,Gaussian ,turbulence ,Plasma ,Condensed Matter Physics ,law.invention ,Computational physics ,Ion ,symbols.namesake ,FIS/01 - FISICA SPERIMENTALE ,Classical mechanics ,Physics::Plasma Physics ,law ,Saturation current ,Gaussian function ,symbols ,magnetoplasma ,FIS/03 - FISICA DELLA MATERIA - Abstract
The statistical properties of plasma fluctuations have been investigated in the plasma boundary region of fusion (tokamaks and stellarators) and nonfusion plasmas. Fluctuations in ion saturation current and floating potential have a near-Gaussian character in the proximity of the velocity shear layer (r(sh)). However, fluctuations deviate from a Gaussian distribution when moving inside of the plasma edge (r < r(sh)) or into the scrape-off layer region (r > r(sh)). Furthermore, fluctuations show sporadic pulses that are asymmetric in time. The present analysis shows a coupling of those pulses and the averaged flow in the shear layer region. (C) 2000 American Institute of Physics. [S1070-664X(00)00805-3].
160. Spectra of highly ionized xenon (6-30 nm) excited in W7-AS plasmas
- Author
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H.H. Hacker, R. Burhenn, K. Kondo, M. Anton, D. Assmus, S. Baeumel, C. Beidler, T. Bindemann, R. Brakel, G. Cattanei, A. Dinklage, A. Dodhy, D. Dorst, H. Ehmler, A. Elsner, M. Endler, K. Engelhardt, V. Erckmann, Y. Feng, C. Fuchs, F. Gadelmeier, J. Geiger, L. Giannone, P. Grigull, G. Gruenwald, O. Grulke, E. Harmeyer, H.J. Hartfuss, F. Herrnegger, M. Hirsch, J. Hofner, F. Hollmann, E. Holzhauer, Y. Igitkhanov, R. Jaenicke, F. Karger, M. Kick, J. Kisslinger, S. Klose, J. Knauer, H. Kroiss, G. Kühner, A. Kus, H. Laqua, R. Liu, H. Maassberg, N. Marushchenko, K. McCormick, G. Michel, F. Noke, W. Ott, M. Otte, M.G. Pacco-Duechs, F.P. Penningsfeld, E. Polunovsky, F. Probst, F. Purps, N. Ruhs, N. Rust, N.J. Saffert, A. Salat, J. Sallander, F. Sardei, F. Schneider, M. Schubert, I. Sidorenko, E. Speth, R. Suess, H. Thomsen, F. Volpe, F. Wagner, A. Weller, C. Wendland, A. Werner, H. Wobig, E. Wuersching, and D. Zimmermann
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Quantum optics ,Materials science ,Physics and Astronomy (miscellaneous) ,Spectrometer ,General Engineering ,General Physics and Astronomy ,chemistry.chemical_element ,Plasma ,Electron ,Spectral line ,Xenon ,chemistry ,Ionization ,Excited state ,Atomic physics - Abstract
The xenon spectrum, excited in ECR- and NBI-heated plasmas with central electron densities of around 1020 m-3, and central electron temperatures from 0.7 to 2.5 keV, has been studied photoelectrically with a multi-channel grazing-incidence spectrometer. Besides numerous well-known lines of Zn- and Cu-like Xenon, more than 50 additional lines which have not yet been published in the literature have been found and partly identified,.
161. Buchbesprechungen
- Author
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W. Ponhold, G. Pauser, M. Endler, G. Freiliner, and Tb. Bochdansky
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Surgery - Published
- 1984
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162. Erhöhte Interleukin-2 Aktivität bei EPH-Gestose
- Author
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K. Derfler, G. Sunder-Plassmann, G. Steger, M. Endler, and P. Balcke
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Obstetrics and Gynecology ,General Medicine - Published
- 1989
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163. Diamagnetic energy measurement during the first operational phase at the Wendelstein 7-X stellarator.
- Author
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K. Rahbarnia, H. Thomsen, U. Neuner, J. Schilling, J. Geiger, G. Fuchert, T. Andreeva, M. Endler, D. Hathiramani, T. Bluhm, M. Zilker, B.b. Carvalho, A. Werner, and Team, Wendelstein 7-X.
- Subjects
DIAMAGNETIC materials ,STELLARATORS ,MAGNETIC flux ,THOMSON scattering ,X-ray imaging - Abstract
The magnetic diagnostic system at the Wendelstein 7-X stellarator includes three diamagnetic loops to measure magnetic flux changes in the plasma. Their signals are directly related to the plasma energy. The diagnostic design with respect to materials, component cooling and data acquisition is built to be fully steady-state capable within the harsh environment of a fusion plasma device. During the first operational phase, two diamagnetic loops have been put into operation, each of them close to one of the up-down symmetric main planes of the plasma column with a bean-shaped and triangular-shaped cross-section, respectively. Both loops measured reliable energies in accordance to theoretical expectations. The triangular-shaped diamagnetic loop is equipped with four compensation coils. They are used to compensate errors during the energy measurement due to small fluctuations of externally driven currents in the main superconducting magnetic field coils and eddy currents in the adjacent vacuum vessel and thereby increase the time-resolution allowing to measure fast changes of the plasma energy. The diamagnetic flux measurements agree well with corresponding estimations of diamagnetic signals using three-dimensional Biot–Savart calculations. A consistency check for the diamagnetic energy is performed by a reconstruction of the associated Pfirsch–Schlüter current distribution and a comparison of predicted signals with measurements of an arrangement of eight plasma encircling Rogowski coil segments. Additionally, the measured diamagnetic energy is compared to kinetic energy calculations based on density and temperature measurements performed by the Thomson scattering diagnostic and the x-ray imaging crystal spectrometer diagnostic. The resulting energy confinement times are similar to predictions of empirical scaling laws, like ISS04. For upcoming operational periods of Wendelstein 7-X, the diamagnetic energy measurement will be used to generate an interlock signal, which will turn off the main plasma heating systems in case of a sudden, unwanted plasma collapse. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF
164. Special Topic
- Author
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D. A. Hartmann, Florian Effenberg, H. Hölbe, D.A. Gates, H. P. Laqua, Samuel Lazerson, S. A. Bozhenkov, Hans-Stephan Bosch, Yuriy Turkin, Thomas Sunn Pedersen, M. Preynas, Matthias Otte, Torsten Stange, Oliver Schmitz, R. König, J. Geiger, Y. Feng, M. Endler, Tamara Andreeva, M. W. Jakubowski, and W7-X Team, Max Planck Institute for Plasma Physics, Max Planck Society
- Subjects
Nuclear and High Energy Physics ,Computer science ,Nuclear engineering ,Divertor ,Phase (waves) ,chemistry.chemical_element ,Topology (electrical circuits) ,Plasma ,Condensed Matter Physics ,01 natural sciences ,010305 fluids & plasmas ,law.invention ,chemistry ,law ,0103 physical sciences ,Limiter ,Wendelstein 7-X ,010306 general physics ,Stellarator ,Helium - Abstract
Wendelstein 7-X (W7-X) is currently under commissioning in preparation for its initial plasma operation phase, operation phase 1.1 (OP1.1). This first phase serves primarily to provide an integral commissioning of all major systems needed for plasma operation, as well as systems, such as diagnostics, that need plasma operation to verify their foreseen functions. In OP1.1, W7-X will have a reduced set of in-vessel components. In particular, five graphite limiter stripes replace the later foreseen divertor. This paper describes the expected machine capabilities in OP1.1, as well as a selection of physics topics that can be addressed in OP1.1, despite the simplified configuration and the reduced machine capabilities. Physics topics include the verification and adjustment of the magnetic topology, the testing of the foreseen plasma start-up scenarios and the feed-forward control of plasma density and temperature evolution, as well as more advanced topics such as scrape-off layer (SOL) studies at short connection lengths and transport studies. Plasma operation in OP1.1 will primarily be performed in helium, with a hydrogen plasma phase at the end.
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- View/download PDF
165. Major results from the first plasma campaign of the Wendelstein 7-X stellarator
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H. Maaßberg, M. Grahl, V. Moncada, Marek Scholz, Naoki Tamura, H. Neilson, R. Koziol, M. Krychowiak, A. Lücke, T. Estrada, R. Munk, M. Marushchenko, K. Toi, Heinrich P. Laqua, S. Paqay, Olaf Grulke, K. Baumann, A. Czermak, Ivan Calvo, Yasuhiro Suzuki, P.J. Heitzenroeder, H. Hölbe, G. Offermanns, Gintautas Dundulis, U. Stridde, H. Hunger, S. Valet, P. Denner, N. Krawczyk, O. Mishchenko, Andrey Samartsev, Mantas Povilaitis, Andrea Pavone, H. Schumacher, P. Aleynikov, H. P. Laqua, U. Wenzel, M. Sibilia, J. Ongena, Kian Rahbarnia, A. Galkowski, T.A. Scherer, C. Slaby, J. Nührenberg, H.-J. Roscher, Martin Köppen, L.-G. Böttger, A. Czarnecka, R. Krampitz, M. Zilker, T. Kremeyer, J. Wendorf, V. Bykov, A. Goriaev, Josef Preinhaelter, A. Alonso, Peter Titus, G. Czymek, Andreas Langenberg, Matteo Zuin, A. Gogoleva, F. Musielok, A. Zeitler, Andreas Schlaich, P. Xanthopoulos, Victoria Winters, M. Losert, D. A. Hartmann, Roberto Guglielmo Citarella, L. Pacios Rodriguez, Boyd Blackwell, E. Blanco, Hans-Stephan Bosch, R. König, R. Stadler, J. Mittelstaedt, Ch. Linsmeier, U. Höfel, N. Panadero Alvarez, E. Pasch, Francesco Cordella, M. Knaup, Fabian Wilde, M. C. Zarnstorff, B. Mendelevitch, Toru Ii Tsujimura, T. Szabolics, Hayato Tsuchiya, J.C. Schmitt, Tadas Kaliatka, Sadayoshi Murakami, Samuel Lazerson, W. Spiess, J. M. García Regaña, P. Junghans, María Sánchez, A. Grosman, I. Yamada, K. P. Hollfeld, K. Aleynikova, Gábor Náfrádi, T. Krings, Daniel Papenfuß, José Luis Velasco, P. Drewelow, N. A. Pablant, S. Renard, Alessandro Zocco, F. Wagner, D. Böckenhoff, S. Ryosuke, Michael Kramer, A. Vorkörper, M. Turnyanskiy, R. Riedl, W. Figacz, H. Trimino Mora, A. da Silva, D. Gradic, M. Keunecke, A. Pieper, M. Houry, S. Pingel, K. H. Schlüter, J. Loizu Cisquella, L. Carraro, S. Schmuck, M. Banduch, Sehyun Kwak, T. Ilkei, X. Huang, Stefan Illy, N. Fahrenkamp, I. Vakulchyk, G. Kocsis, Ph. Mertens, T. Morizaki, K. Czerski, F. V. Chernyshev, Bernd Heinemann, L. Lewerentz, B.J. Peterson, Francisco Castejón, Olaf Neubauer, D. Zhang, Torsten Bluhm, F. Köchl, C.P. von Thun, Michael Cole, Fabio Pisano, R. Brakel, Peter Traverso, G. Orozco, Wolf-Dieter Schneider, A. A. Ivanov, S. Sipliä, V. Szabó, D. Pilopp, A. Cappa, G. Anda, H. Braune, A. Krämer-Flecken, R. Sakamoto, A. Charl, Hiroshi Kasahara, Massimiliano Romé, J.-H. Feist, Mark Cianciosa, M. Führer, G. Schlisio, Taina Kurki-Suonio, F. Purps, H. Esteban, A. H. Reiman, J. Krom, C. D. Beidler, D. Loesser, H. M. Smith, Nengchao Wang, Axel Könies, Oliver Schmitz, T. Bräuer, M. Hirsch, Gabriel G. Plunk, Felix Warmer, R. Karalevicius, Riccardo Nocentini, J.L. Terry, John Jelonnek, Arnold Lumsdaine, L. Ryć, M. N. A. Beurskens, H. Jenzsch, Z. Sulek, Donald A. Spong, A. Khilchenko, P. Marek, R. Schroeder, T. Schröder, B. Standley, Manfred Thumm, B. Brünner, T. Fornal, Benedikt Geiger, H. Frerichs, R. Kleiber, T. Funaba, Andreas Meier, S. Degenkolbe, P. Rong, Dag Hathiramani, Matthias F. Schneider, Simppa Äkäslompolo, M. R. Stoneking, A. Dudek, Jiawu Zhu, X. Han, T. Windisch, Y. Wei, Detlev Reiter, J. Tretter, N. Rust, J. P. Kallmeyer, J. Baldzuhn, P. Bolgert, Dirk Timmermann, Shinsuke Satake, Luis Vela Vela, Yu. Turkin, Z. Szökefalvi-Nagy, Sigitas Rimkevicius, Naoki Kenmochi, Ulrich Neuner, M. Garcia-Munoz, V. Perseo, Matthias Otte, A. Puig Sitjes, Tamás Szepesi, A. da Molin, Alexis Terra, C. Guerard, J.M. Hernández Sánchez, A. Rodatos, J. Assmann, D. Höschen, Albert Mollén, A. Hölting, Tom Wauters, Adnan Ali, Ewa Pawelec, W. Kasparek, Ryo Yasuhara, D. Kinna, P. Sinha, B. Wiegel, Horacio Fernandes, M. E. Puiatti, S. Récsei, E. Ascasíbar, J.-M. Travere, C. Hidalgo, Joris Fellinger, H. Schmitz, Suguru Masuzaki, Katsumi Ida, G. Pelka, Jim-Felix Lobsien, S. Wolf, Jörg Schacht, J. Koshurinov, Han Zhang, P. Kornejew, J M Fontdecaba, T. Ngo, E. Wang, B. Hein, Gerd Gantenbein, Michael Drevlak, M. Vervier, J. W. Oosterbeek, H. Röhlinger, J. P. Knauer, B. Schweer, Jakub Urban, David Maurer, I. Ksiazek, David Gates, S. C. Liu, S. Massidda, F. Remppel, A.H. Wright, G. Satheeswaran, Monika Kubkowska, K. Rummel, Kai Jakob Brunner, Torsten Stange, J. Riemann, Thomas Klinger, S. Obermayer, H. Brand, Christine Hennig, A. Werner, N. Gierse, S. A. Henneberg, R. Vilbrandt, J. Wolowski, T. Sunn Pedersen, M. Dostal, G. A. Wurden, I. Abramovic, Carsten Lechte, R. Lang, S. A. Bozhenkov, G. Ehrke, K. J. McCarthy, Egidijus Urbonavicius, M. Schröder, S. Jablonski, Martina Huber, M. Nagel, Yunfeng Liang, O. P. Ford, Barbara Cannas, T. Mizuuchi, Anatoly Panin, Jan Skodzik, V. V. Lutsenko, R. Koslowski, R. Laube, Jonathan T. Green, B. Unterberg, Jeremy Lore, Laurie Stephey, J. H. E. Proll, M. Czerwinski, Venanzio Giannella, Jörg Weggen, S. Marsen, Clifford M Surko, Grzegorz Gawlik, B. Roth, D. Birus, Ch. Brandt, M. Mardenfeld, K. Riße, Y. Feng, Alexandra M. Freund, M. Vergote, S. Wadle, H. Thomsen, Wilfried Behr, A. Runov, L. Wegener, Burkhard Plaum, J. Svensson, Dmitry Moseev, Łukasz Ciupiński, G. M. Weir, E. Winkler, W. Pan, E. Erckmann, D. Mellein, B. Shanahan, Th. Kobarg, Marek Barlak, John Howard, Günter Dammertz, M. Endler, D.P. Dhard, N. Vianello, L. V. Lubyako, R. Burhenn, J. Thomas, N. Panadero, M. Gruca, T. Mönnich, J. Majano-Brown, Wolfgang Biel, S. Tulipán, J. H. Harris, C. Nührenberg, A. Carls, H. Viebke, Walter H. Fietz, L. Haiduk, S. Brezinsek, Heinz Grote, S. Langish, V. Huber, Jacek Jagielski, David Ennis, P. Kraszewsk, J. Kacmarczyk, Kunihiro Ogawa, U. Kamionka, O. Bertuch, F. Durodié, B. Missal, A. de la Peña, Robertas Alzbutas, Anett Spring, Yu Gao, Matt Landreman, Dirk Naujoks, Florian Effenberg, P. McNeely, Ya. I. Kolesnichenko, B. Gonçalves, B. van Millingen, M. Blatzheim, X. Peng, F. Harberts, M. W. Jakubowski, F. Köster, Gábor Cseh, Ph. Drews, Christoph Biedermann, G. Claps, L. Rudischhauser, Bernardo B. Carvalho, M. Yokoyama, Seung Gyou Baek, Felix Schauer, V. Borsuk, Th. Rummel, J. Boscary, Fumimichi Sano, J. R. Danielson, M. Rack, G. Fuchert, H.-J. Hartfuß, W. Leonhardt, Georg Kühner, D. R. Mikkelsen, M. Borchardt, A. Benndorf, P. Scholz, R. C. Wolf, I.V. Shikhovtsev, Holger Niemann, Andreas Zimbal, J. Geiger, T. Barbui, M. Lennartz, A. Lorenz, Andreas Dinklage, G. Krzesiński, J. Zajac, B. Israeli, R. Schrittwieser, M.J. Cole, S. Zoletnik, O. Marchuk, Per Helander, B. Buttenschön, P. van Eeten, Tamara Andreeva, Hiroshi Yamada, Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear, Max-Planck-Institut fur Plasmaphysik Teilinstitut Greifswald, Wendelsteinstr. 1, 17491 Greifswald, Germany, Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), KFKI Research Institute for Particle and Nuclear Physics (KFKI-RMKI), Forschungszentrum Julich GmbH, Institut fur Energie- und Klimaforschung---Plasmaphysik, Partner of the Trilateral Euregio Cluster (TEC), Wilhelm-Johnen-Strase, 52428 Julich, Germany, University of Maryland, Princeton, Laboratory for Plasma Physics of the Ecole Royale Militaire/Koninklijke Militaire School (LPP-ERM/KMS), Avenue de la Renaissance 30, 1000 Bruxelles, Belgien, Los Alamos National Laboratory (LANL), Institute of Physics, Massachusetts Institute of Technology, Cambridge, University of Wisconsin-Madison, National Centre for Nuclear Research (NCBJ), Institut für Experimentelle Kernphysik, Universität Karlsruhe (IEKP), Geoscience Australia, Max Planck Institut für Plasma Physik and Excellence Cluster, Eindhoven University of Technology, Università degli Studi di Cagliari = University of Cagliari (UniCa), Consorzio Interuniversitario per la Fisica Spaziale (CIFS), Instituto Superior Técnico, Universidade de Lisboa (IST), A.F. Ioffe Physical-Technical Institute, Russian Academy of Sciences [Moscow] (RAS), Computer Science and Mathematics Division, Oak Ridge National Laboratory, Università di Milano, Warsaw University of Technology, ENEA-Frascati, IPPLM Institute of Plasma Physics and Laser Microfusion, 23 Hery Str., 01-497 Warsaw, Poland, Institute of Nuclear Physics PAN, University of Szczecin, 70-453, aleja Papieza Jana Pawla II 22A, Szczecin, Poland, Milano, University of California [San Diego] (UC San Diego), University of California (UC), International Center for Climate and Global Change Research and School of Forestry and Wildlife Sciences, Auburn University, Brandenburg University of Technology Cottbus-Senftenberg, Universitatsplatz 1, 01968 Senftenberg, Germany, National Institute for Fusion Science (NIFS), 322-6 Oroshicho, Toki, Gifu Prefecture 509-5202, Japan, Universidad Carlos III de Madrid (UC3M), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), EURATOM/UKAEA Fusion Association, Culham Science Centre, Abingdon, Budker Institute of Nuclear Physics (BINP), 11, akademika Lavrentieva prospect, Novosibirsk, 630090, Russian Federation, Institut für Raumfahrtsysteme, Universität Stuttgart (IRS), Fraunhofer-Institut fur Schicht- und Oberflachentechnik IST, Bienroder Weg 54 E, 38108 Braunschweig, Germany, Institut für Weltraumforschung, Österreichische Akademie der Wissenschaften (IWF), Kiev Institute for Nuclear Research, A.M. Obukhov Institute of Atmospheric Physics, Russian Academy of Sciences (IAP), Institut für Optik und Atomare Physik, Technische Universität Berlin, University of Opole, plac Kopernika 11a, 45-001 Opole, Poland, School of Electrical Engineering, Aalto University, Physikalisch-Technische Bundesanstalt (PTB), Kyoto University, Institute of Plasma Physics, Chinese Academy of Sciences, 350 Shushanhu Rd., Hefei, Anhui 230031, People's Republic of China, Institute of Plasma Physics of the Czech Academy of Science, Za Slovankou 1782/3, 182 00 Prague 8---Liben, Czechia, Istituto di Fisica del Plasma, Consiglio Nazionale delle Ricerche (IFP-CNR), Fraunhofer-Institut fur Werkzeugmaschinen und Umformtechnik IWU, Reichenhainer Strase 88, 09126 Chemnitz, Germany, Universität Rostock, Wayne State University, Consiglio Nazionale delle Ricerche, Piazzale Aldo Moro, 7, 00185 Roma, Italy, Max Planck Institute for Plasma Physics, CIEMAT, Wigner Research Centre for Physics, Jülich Research Centre, University of Maryland, College Park, Princeton University, Royal Military Academy, Los Alamos National Laboratory, Lithuanian Energy Institute, Massachusetts Institute of Technology, Narodowe Centrum Badań Jadrowych, Karlsruhe Institute of Technology, Australian National University, University of Cagliari, National Research Council of Italy, Instituto Superior Tecnico Lisboa, Ioffe Institute, Oak Ridge National Laboratory, University of Salerno, Agenzia nazionale per le nuove tecnologie, l'energia e lo sviluppo economico sostenibile, Soltan Institute for Nuclear Studies, The Henryk Niewodniczanski Institute of Nuclear Physics of the Polish Academy of Sciences, University of Szczecin, University of Milan - Bicocca, University of California San Diego, Auburn University, Brandenburg University of Technology, National Institute for Fusion Science, Universidad Carlos III de Madrid, CEA, Culham Centre for Fusion Energy, RAS - Budker Institute of Nuclear Physics, University of Stuttgart, Fraunhofer Institute for Surface Engineering and Thin Films, Austrian Academy of Sciences, NASU - Institute of Nuclear Research, RAS - Institute of Applied Physics, Technical University of Berlin, University of Opole, Department of Applied Physics, Physikalisch-Technische Bundesanstalt, CAS - Institute of Plasma Physics, Czech Academy of Sciences, Istituto di Fisica Del Plasma Piero Caldirola, Fraunhofer Institute for Machine Tools and Forming Technology, University of Rostock, Lawrence University, Aalto-yliopisto, Aalto University, Science and Technology of Nuclear Fusion, Turbulence in Fusion Plasmas, Claps, G., and Cordella, F
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Magnetic confinement ,Nuclear and High Energy Physics ,Technology and Engineering ,Plasma heating ,Cyclotron resonance ,CONFINEMENT ,01 natural sciences ,Electron cyclotron resonance ,010305 fluids & plasmas ,law.invention ,PHYSICS ,Nuclear physics ,stellarator ,current drive ,magnetic confinement ,plasma heating ,Condensed Matter Physics ,law ,0103 physical sciences ,ddc:530 ,010306 general physics ,tellarator ,Stellarator ,Physics ,Magnetic confinement fusion ,Plasma ,530 Physik ,TRANSPORT ,Current drive ,Electron temperature ,Plasma diagnostics ,Atomic physics ,Wendelstein 7-X ,[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] - Abstract
After completing the main construction phase of Wendelstein 7-X (W7-X) and successfully commissioning the device, first plasma operation started at the end of 2015. Integral commissioning of plasma start-up and operation using electron cyclotron resonance heating (ECRH) and an extensive set of plasma diagnostics have been completed, allowing initial physics studies during the first operational campaign. Both in helium and hydrogen, plasma breakdown was easily achieved. Gaining experience with plasma vessel conditioning, discharge lengths could be extended gradually. Eventually, discharges lasted up to 6 s, reaching an injected energy of 4 MJ, which is twice the limit originally agreed for the limiter configuration employed during the first operational campaign. At power levels of 4 MW central electron densities reached 3 × 1019 m−3 , central electron temperatures reached values of 7 keV and ion temperatures reached just above 2 keV. Important physics studies during this first operational phase include a first assessment of power balance and energy confinement, ECRH power deposition experiments, 2nd harmonic O-mode ECRH using multi-pass absorption, and current drive experiments using electron cyclotron current drive. As in many plasma discharges the electron temperature exceeds the ion temperature significantly, these plasmas are governed by core electron root confinement showing a strong positive electric field in the plasma centre. EURATOM 633053
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166. Scenario with combined density and heating control to reduce the impact of the bootstrap current in Wendelstein 7-X
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P. Sinha, D. Böckenhoff, H. Hölbe, Thomas Sunn Pedersen, H. M. Smith, Yuriy Turkin, M. Endler, J. Geiger, and W7-X Team, Max Planck Institute for Plasma Physics, Max Planck Society
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Nuclear and High Energy Physics ,Toroid ,Divertor ,Mechanics ,Condensed Matter Physics ,01 natural sciences ,7. Clean energy ,010305 fluids & plasmas ,law.invention ,Bootstrap current ,Physics::Plasma Physics ,law ,0103 physical sciences ,Transient (oscillation) ,Current (fluid) ,Wendelstein 7-X ,Electric current ,010306 general physics ,Stellarator - Abstract
Wendelstein 7-X is a low-shear stellarator with an island divertor, formed by natural magnetic islands at the plasma edge and ten modular divertor units for particle and energy exhaust. For the island divertor concept to work properly, the device is optimized for small internal currents, in particular, the bootstrap current is minimized. Previous studies predicted a thermal overload of the targets at a particular location, due to the slow evolution of the toroidal net current in the initial phase of certain otherwise desirable high-power discharges. The present numerical study explores the neoclassical predictions for the bootstrap current in more detail and demonstrates, as a proof of principle, that a path from low density and low heating power to high density and full heating power exists, on which the bootstrap current remains constant. This offers the possibility to reach the predetermined toroidal net current at low heating power, where no overload will occur in the transient phase.
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167. Confinement in Wendelstein 7-X limiter plasmas.
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M. Hirsch, A. Dinklage, A. Alonso, G. Fuchert, S. Bozhenkov, U. Höfel, T. Andreeva, J. Baldzuhn, M. Beurskens, H.-S. Bosch, C.D. Beidler, C. Biedermann, E. Blanco, R. Brakel, R. Burhenn, B. Buttenschön, A. Cappa, A. Czarnecka, M. Endler, and T. Estrada
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PLASMA confinement ,PLASMA gases ,STELLARATORS ,ELECTRONS ,PLASMA currents - Abstract
Observations on confinement in the first experimental campaign on the optimized Stellarator Wendelstein 7-X are summarized. In this phase W7-X was equipped with five inboard limiters only and thus the discharge length restricted to avoid local overheating. Stationary plasmas are limited to low densities <2–3 · 10
19 m−3 . With the available 4.3 MW ECR Heating core Te ~ 8 keV, Ti ~ 1–2 keV are achieved routinely resulting in energy confinement time τE between 80 ms to 150 ms. For these conditions the plasmas show characteristics of core electron root confinement with peaked Te -profiles and positive Er up to about half of the minor radius. Profiles and plasma currents respond to on- and off-axis heating and co- and counter ECCD respectively. [ABSTRACT FROM AUTHOR]- Published
- 2017
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168. Plans for the first plasma operation of Wendelstein 7-X.
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T. Sunn Pedersen, T. Andreeva, H.-S. Bosch, S. Bozhenkov, F. Effenberg, M. Endler, Y. Feng, D.A. Gates, J. Geiger, D. Hartmann, H. Hölbe, M. Jakubowski, R. König, H.P. Laqua, S. Lazerson, M. Otte, M. Preynas, O. Schmitz, T. Stange, and Y. Turkin
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PLASMA physics ,STELLARATORS ,PLASMA confinement devices ,FUSION reactor limiters ,FUSION reactor materials - Abstract
Wendelstein 7-X (W7-X) is currently under commissioning in preparation for its initial plasma operation phase, operation phase 1.1 (OP1.1). This first phase serves primarily to provide an integral commissioning of all major systems needed for plasma operation, as well as systems, such as diagnostics, that need plasma operation to verify their foreseen functions. In OP1.1, W7-X will have a reduced set of in-vessel components. In particular, five graphite limiter stripes replace the later foreseen divertor. This paper describes the expected machine capabilities in OP1.1, as well as a selection of physics topics that can be addressed in OP1.1, despite the simplified configuration and the reduced machine capabilities. Physics topics include the verification and adjustment of the magnetic topology, the testing of the foreseen plasma start-up scenarios and the feed-forward control of plasma density and temperature evolution, as well as more advanced topics such as scrape-off layer (SOL) studies at short connection lengths and transport studies. Plasma operation in OP1.1 will primarily be performed in helium, with a hydrogen plasma phase at the end. [ABSTRACT FROM AUTHOR]
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- 2015
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169. Tracking of the magnet system geometry during Wendelstein 7-X construction to achieve the designed magnetic field.
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T. Andreeva, T. Bräuer, V. Bykov, K. Egorov, M. Endler, J. Fellinger, J. Kißlinger, M. Köppen, and F. Schauer
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MAGNETS ,MAGNETIC fields ,STELLARATORS ,MANUFACTURING processes - Abstract
Wendelstein 7-X, currently under commissioning at the Max-Planck-Institut für Plasmaphysik in Greifswald, Germany, is a modular advanced stellarator, combining the modular coil concept with optimized properties of the plasma. Most of the envisaged magnetic configurations of the machine are rather sensitive to symmetry breaking perturbations which are the consequence of unavoidable manufacturing and assembly tolerances. This overview describes the successive tracking of the Wendelstein 7-X magnet system geometry starting from the manufacturing of the winding packs up to the modelling of the influence of operation loads. The deviations found were used to calculate the resulting error fields and to compare them with the compensation capacity of the trim coils. [ABSTRACT FROM AUTHOR]
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- 2015
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170. Major results from the stellarator Wendelstein 7-AS.
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M Hirsch, J Baldzuhn, C Beidler, R Brakel, R Burhenn, A Dinklage, H Ehmler, M Endler, V Erckmann, Y Feng, J Geiger, L Giannone, G Grieger, P Grigull, J Hartfu, D Hartmann, R Jaenicke, R K, H P Laqua, and H Maa
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PHYSICS research ,STELLARATORS ,MAGNETOHYDRODYNAMICS ,PLASMA devices - Abstract
Wendelstein 7-AS was the first modular stellarator device to test some basic elements of stellarator optimization: a reduced Shafranov shift and improved stability properties resulted in b-values up to 3.4% (at 0.9 T). This operational limit was determined by power balance and impurity radiation without noticeable degradation of stability or a violent collapse. The partial reduction of neoclassical transport could be verified in agreement with calculations indicating the feasibility of the concept of drift optimization. A full neoclassical optimization, in particular a minimization of the bootstrap current was beyond the scope of this project. A variety of non-ohmic heating and current drive scenarios by ICRH, NBI and in particular, ECRH were tested and compared successfully with their theoretical predictions. Besides, new heating schemes of overdense plasmas were developed such as RF mode conversion heating--Ordinary mode, Extraordinary mode, Bernstein-wave (OXB) heating--or 2nd harmonic O-mode (O2) heating. The energy confinement was about a factor of 2 above ISS95 without degradation near operational boundaries. A number of improved confinement regimes such as core electron-root confinement with central Te [?] 7 keV and regimes with strongly sheared radial electric field at the plasma edge resulting in Ti [?] 1.7 keV were obtained. As the first non-tokamak device, W7-AS achieved the H-mode and moreover developed a high density H-mode regime (HDH) with strongly reduced impurity confinement that allowed quasi-steady-state operation (t [?] 65 · tE) at densities \bar {n}_{\rme} \cong 4 \times 10^{20}\,\mbox{m}^{-3} (at 2.5 T). The first island divertor was tested successfully and operated with stable partial detachment in agreement with numerical simulations. With these results W7-AS laid the physics background for operation of an optimized low-shear steady-state stellarator. [ABSTRACT FROM AUTHOR]
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- 2008
171. A silent pandemic of violence against providers in obstetrics and gynecology: A mixed-methods study based on a global survey.
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Endler M, Ramirez-Negrin A, and Sohail R
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Objectives: To quantify and qualify the experience of workplace violence (WPV) in a global sample of providers in obstetrics and gynecology (OBGYN)., Methods: We performed a mixed-methods analysis on data from a global survey. Survey content was designed around categorical and open-ended questions in relation to WPV; the occurrence and character, the physical and psychological consequences, training and support structures, and perceived triggers of the experience of WPV. Quantitative data were analyzed using descriptive statistics and text data using mixed deductive-inductive content analysis. These data were integrated using convergent joint display., Results: Between October 2023 and January 2024, survey responses were collected from 77 individual countries. Among the final sample, 764/1016 (75.2%) had experienced WPV, 699/1016 (68.8%) verbal, and 123/1016 (12.1%) physical violence. The violence affected physical health, psychological health, or job satisfaction for 106/764 (13.9%), 36/7642 (47.4%), and 222/764 (29.1%) of individuals respectively; 216/764 (28.3%) received support. Main WPV triggers were staff shortages, lack of security personnel, and long waiting times, identified by 38.8%, 37.5%, and 37.3% of respondents respectively. Qualitative data indicated that violence caused severe and long-lasting suffering. Catalysts for WPV were often reported as complex interplays between unmet or unrealistic expectations and insufficient resources. Lack of support for WPV was explained as violence being "part of the job" and a culture of assumed resilience among providers., Conclusion: WPV against OBGYN providers seems to be ubiquitous, arises from a complex interplay of factors, and causes significant injury while receiving insufficient mitigation and support., (© 2024 The Author(s). International Journal of Gynecology & Obstetrics published by John Wiley & Sons Ltd on behalf of International Federation of Gynecology and Obstetrics.)
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- 2024
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172. No test medical abortion - a review of the evidence on selective use of preabortion testing.
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Cleeve A, Wallengren E, Brandell K, Lee S, Endler M, and Reynolds-Wright J
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- Humans, Female, Pregnancy, Health Services Accessibility, Pregnancy, Ectopic diagnosis, Abortion Applicants psychology, Abortion, Induced, Telemedicine
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Purpose of Review: The last decade has seen a cascade of different telemedicine models for medical abortion (MA) being tested and implemented. Among these service delivery models is the 'no-test' MA model, in which care is provided remotely and eligibility for the MA is based on history alone. The purpose of this review is to provide an overview of the existing evidence for no-test MA., Recent Findings: The evidence base for no-test MA relies heavily on cohort and noncomparative studies predominantly from high resource settings. Recent findings indicate that no-test MA is safe, effective, and highly acceptable. Diagnoses of ectopic pregnancy and underestimation of gestational age were rare. Identified advantages included shortening time to access MA and mitigating access barriers such as cost, and geographical barriers. Abortion seekers valued omitting the ultrasound citing reasons such as privacy concerns, costs, more flexibility, and control. The impacts of no-test MA on unscheduled postabortion contacts and visits and on contraceptive use were unclear due to limited evidence., Summary: No-test MA can be provided to complement other care pathways including those with some or no in-person care. Further research is needed to allow for widespread adoption of no-test MA and scale-up in a variety of contexts, including low-resource settings., (Copyright © 2024 Wolters Kluwer Health, Inc. All rights reserved.)
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- 2024
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173. Pop-up Langmuir probe diagnostic in the water cooled divertor of Wendelstein 7-X.
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Pandey A, Bohm S, Carls A, Cordes C, Endler M, Fellinger J, Freundt S, Gallowski K, Hammond K, Hathiramani D, Isberner G, Kallmeyer JP, Krause M, Kügler J, Otte M, Pedersen TS, Rondeshagen D, Ruhnau J, Schröder T, Sieber T, and Wendorf J
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The design, development, and successful implementation of pop-up Langmuir probes installed in the water-cooled divertor of W7-X are described. The probes are controlled by drive coils (actuators) installed behind the divertor plates. These drive coils make use of the magnetic field in W7-X to move the probe tips into and out of the plasma. The drive coils were installed in the vacuum vessel after extensively testing the durability of the coils and analyzing the criteria for safe operation. The probe design is carefully tailored for each of the 36 probe tips in order to be suitable for the different magnetic field configurations used in W7-X and ensure that the probes do not present leading edges to the magnetic flux tubes. An electronic bridge circuit is used for measurement to compensate for the effects of signal propagation time on the long cable lengths used. The diagnostic is integrated with the segment control of W7-X for automated operation and control of the diagnostic. The evaluation of the results from the plasma operation is presented after accounting for appropriate sheath expansion for negative bias voltage on the probes., (© 2024 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).)
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- 2024
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174. "I hope to all the world they don't forget women of Afghanistan": An interrupted survey among doctors in Afghanistan.
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Endler M, Hassan L, Gemzell-Danielsson K, Babak S, and Sohail R
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- Humans, Female, Pregnancy, Afghanistan epidemiology, Cross-Sectional Studies, Prenatal Care, Surveys and Questionnaires, Reproductive Health Services
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Objective: To assess current access to essential sexual and reproductive health (SRHR) services in Afghanistan and how access has changed with the transition of power., Methods: This is a cross-sectional study based on data from an anonymous survey among doctors in Afghanistan in May 2022, analyzed using descriptive statistics. The survey recorded subjective estimates of access to SRHR services, barriers to access, extent of maternal mortality or near miss due to preventable factors, and the effect of the regime change on access., Results: The data collection was interrupted after 60 responses. A majority of providers responded that their population went hungry often or always. According to our criteria for "access", that 75% or more of the population was estimated to have it, no respondents (0%) assessed that access existed for services for gender-based violence. The corresponding proportion responding that access existed was 3.4% for services after rape, 12.6% for legal abortion, 13.3% for antenatal care, and 20% for labor care. According to 41.7% of respondents, untreated postpartum hemorrhage accounted for a large or very large proportion of preventable maternal mortality or near miss. Almost half of respondents (47.4%) reported the same for lack of skilled providers, 66.2% reported it for the concept "too many pregnancies", and 55% reported it for malnutrition and poor health. According to 43.3% of respondents, the regime change had reduced access to labor care to a large extent, 33.9% of respondents said this in relation to access to contraceptives, and 43.1% for overall access for internally displaced persons., Conclusion: Interim data suggest that women in some settings in Afghanistan have no access to SRHR services, that preventable factors account for a large portion of maternal deaths or near miss, and that access has deteriorated since the transition of power., (© 2023 The Authors. International Journal of Gynecology & Obstetrics published by John Wiley & Sons Ltd on behalf of International Federation of Gynecology and Obstetrics.)
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- 2023
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175. Editorial: Women facing crises.
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Endler M, Ramirez-Negrin A, and Johnson TRB
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- 2023
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176. Are sexual and reproductive health and rights taught in medical school? Results from a global survey.
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Endler M, Al-Haidari T, Benedetto C, Chowdhury S, Christilaw J, El Kak F, Galimberti D, Gutierrez M, Ibrahim S, Kumari S, McNicholas C, Flores DM, Muganda J, Ramirez-Negrin A, Senanayake H, Sohail R, Temmerman M, and Gemzell Danielsson K
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- Pregnancy, Female, Humans, Schools, Medical, Reproductive Rights, Surveys and Questionnaires, Reproductive Health, Sexual Health
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Our aim was to investigate the inclusion of sexual and reproductive health and rights (SRHR) topics in medical curricula and the perceived need for, feasibility of, and barriers to teaching SRHR. We distributed a survey with questions on SRHR content, and factors regulating SRHR content, to medical universities worldwide using chain referral. Associations between high SRHR content and independent variables were analyzed using unconditional linear regression or χ
2 test. Text data were analyzed by thematic analysis. We collected data from 219 respondents, 143 universities and 54 countries. Clinical SRHR topics such as safe pregnancy and childbirth (95.7%) and contraceptive methods (97.2%) were more frequently reported as taught compared with complex SRHR topics such as sexual violence (63.8%), unsafe abortion (65.7%), and the vulnerability of LGBTQIA persons (23.2%). High SRHR content was associated with high-income level (P = 0.003) and low abortion restriction (P = 0.042) but varied within settings. Most respondents described teaching SRHR as essential to the health of society. Complexity was cited as a barrier, as were cultural taboos, lack of stakeholder recognition, and dependency on fees and ranking., (© 2022 The Authors. International Journal of Gynecology & Obstetrics published by John Wiley & Sons Ltd on behalf of International Federation of Gynecology and Obstetrics.)- Published
- 2022
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177. Impact of the COVID-19 pandemic on access to and utilisation of services for sexual and reproductive health: a scoping review.
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VanBenschoten H, Kuganantham H, Larsson EC, Endler M, Thorson A, Gemzell-Danielsson K, Hanson C, Ganatra B, Ali M, and Cleeve A
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- Adolescent, Adult, Female, Humans, Middle Aged, Pandemics, Pregnancy, Reproductive Health, Young Adult, COVID-19, Reproductive Health Services, Sexual Health, Sexually Transmitted Diseases prevention & control
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Introduction: The COVID-19 pandemic has negatively impacted health systems globally and widened preexisting disparities. We conducted a scoping review on the impact of the COVID-19 pandemic on women and girls' access to and utilisation of sexual and reproductive health (SRH) services for contraception, abortion, gender-based and intimate partner violence (GBV/IPV) and sexually transmitted infections (STIs)., Methods: We systematically searched peer reviewed literature and quantitative reports, published between December 2019 and July 2021, focused on women and girls' (15-49 years old) access to and utilisation of selected SRH services during the COVID-19 pandemic. Included studies were grouped based on setting, SRH service area, study design, population and reported impact. Qualitative data were coded, organised thematically and grouped by major findings., Results: We included 83 of 3067 identified studies and found that access to contraception, in-person safe abortion services, in-person services for GBV/IPV and STI/HIV testing, prevention and treatment decreased. The geographical distribution of this body of research was uneven and significantly less representative of countries where COVID-19 restrictions were very strict. Access was limited by demand and supply side barriers including transportation disruptions, financial hardships, limited resources and legal restrictions. Few studies focused on marginalised groups with distinct SRH needs., Conclusion: Reports indicated negative impacts on access to and utilisation of SRH services globally, especially for marginalised populations during the pandemic. Our findings call for strengthening of health systems preparedness and resilience to safeguard global access to essential SRH services in ongoing and future emergencies., Competing Interests: Competing interests: None declared., (© Author(s) (or their employer(s)) 2022. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.)
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- 2022
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178. A telemedicine model for abortion in South Africa: a randomised, controlled, non-inferiority trial.
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Endler M, Petro G, Gemzell Danielsson K, Grossman D, Gomperts R, Weinryb M, and Constant D
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- Female, Humans, Mifepristone, Pregnancy, South Africa, Abortion, Induced, Abortion, Spontaneous, Misoprostol, Telemedicine
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Background: Telemedicine for medical abortion increases access to safe abortion but its use has not been described in a controlled trial. We aimed to investigate the effectiveness, adherence, safety, and acceptability of a modified telemedicine protocol for abortion compared with standard care in a low-resource setting., Methods: In this randomised, controlled, non-inferiority trial we recruited women seeking medical abortion at or before 9 gestational weeks at four public health clinics in South Africa. Participants were randomly allocated (1:1) by computer-generated blocks of varying sizes to telemedicine or standard care. The telemedicine group received asynchronous online abortion consultation and instruction, self-assessed gestational duration, and had a uterine palpation as a safety measure. Participants in this group took 200 mg mifepristone and 800 μg misoprostol at home. The standard care group received in-person consultation and instruction together with an ultrasound, took 200 mg mifepristone in clinic and 800 μg misoprostol at home. Our primary outcome was complete abortion after initial treatment, assessed at a 6-week interview. Our non-inferiority margin was 4%. Group differences were assessed by modified intention-to-treat (mITT) analysis and per protocol. The trial is registered at ClinicalTrials.gov, NCT04336358, and the Pan African Clinical Trials Registry, PACTR202004661941593., Findings: Between Feb 28, 2020, and Oct 5, 2021, we enrolled 900 women, 153 (17·0%) of whom were discontinued before the abortion and were not included in the analysis. By mITT analysis, 355 (95·4%) of 372 women in the telemedicine group had a complete abortion compared with 338 (96·6%) of 350 in the standard care group (odds ratio 0·74 [95% CI 0·35 to 1·57]). The risk difference was -1·1% (-4·0 to 1·7). Among women who completed treatment as allocated (per protocol), 327 (95·6%) of 342 women in telemedicine group had complete abortion, compared with 338 (96·6%) of 350 in the standard care group (0·77 [0·36 to 1·68]), with a risk difference of -1·0% (-3·8 to 1·9). One participant (in the telemedicine group) had a ruptured ectopic pregnancy, and a further four participants were admitted to hospital (two in each group), of whom two had blood transfusions (one in each group)., Interpretation: Asynchronous online consultation and instruction for medical abortion and home self-medication, with uterine palpation as the only in-person component, was non-inferior to standard care with respect to rates of complete abortion, and did not affect safety, adherence, or satisfaction., Funding: Grand Challenges Canada and the Swedish Research Council., Competing Interests: Declaration of interests RG is founder and director of WoW, the telemedicine service platform used in the study. All other authors declare no competing interests., (Copyright © 2022 Elsevier Ltd. All rights reserved.)
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- 2022
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179. Effect of levonorgestrel emergency contraception on implantation and fertility: A review.
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Endler M, Li R, and Gemzell Danielsson K
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- Female, Fertility, Humans, Levonorgestrel, Pregnancy, Abortion, Spontaneous etiology, Contraception, Postcoital adverse effects, Contraception, Postcoital methods, Pregnancy, Ectopic etiology
- Abstract
Purpose: Levonorgestrel-only emergency contraception (EC) inhibits ovulation to prevent fertilization. Misconceptions regarding its mechanism of action contribute to low use in some settings. We aimed to review the mechanism of action of Levonorgestrel EC and assess the evidence for a postovulatory effect on viable pregnancy development in the exposed and subsequent cycles., Basic Procedures: We searched Pubmed, Embase, Web of Science, clinicaltrials.gov, the Cochrane database, and the US FDA Adverse Event Reporting System. We included studies reporting on the effect of Levonorgestrel EC exposure on (1) ovulation, (2) conception, (3) implantation, (4) ectopic pregnancy, (5) pregnancy viability, and (6) fertility in subsequent cycles. Data were extracted and tabulated from included studies by two researchers. The results were analyzed and summarized in narrative form., Main Findings: We included 33 studies. Women exposed to Levonorgestrel EC at or after the LH (luteinizing hormone) surge had similar rates of inhibited ovulation (3 studies) and conception rates (2 studies) as controls. Nine out of ten studies found no difference in endometrial receptivity to implantation after exposure to Levonorgestrel EC compared to controls. The evidence for an association between Levonorgestrel EC and reduced fallopian tube motility or ectopic pregnancy was conflicting. We found no evidence of increased miscarriage or teratogenicity (3 studies) or disrupted menstrual cycle (3 studies) after Levonorgestrel EC exposure compared to controls., Principal Conclusions: This review supports that Levonorgestrel EC taken after ovulation does not affect implantation and results in similar conception rates compared to placebo. There is no evidence that exposure to Levonorgestrel EC affects fetal development, miscarriage, stillbirth, or subsequent menstruations., Competing Interests: Declaration of Competing Interest ME received a partial salary for the research involved in performing the systematic review from Foundation Consumer Healthcare. She has no other conflicts of interest to report. KGD has served as ad hoc invited speaker or on advisory meetings for Gedeon Richter, Bayer AG, MSD, Exelgyn, Exeltis, Azanta, HRA Pharma, and Ferring. RHWL has received research support from HRA Pharma and Ferring and served as an ad hoc invited speaker for Ferring., (Copyright © 2022 The Authors. Published by Elsevier Inc. All rights reserved.)
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- 2022
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180. A conceptual IoT-based early-warning architecture for remote monitoring of COVID-19 patients in wards and at home.
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Paganelli AI, Velmovitsky PE, Miranda P, Branco A, Alencar P, Cowan D, Endler M, and Morita PP
- Abstract
Due to the COVID-19 pandemic, health services around the globe are struggling. An effective system for monitoring patients can improve healthcare delivery by avoiding in-person contacts, enabling early-detection of severe cases, and remotely assessing patients' status. Internet of Things (IoT) technologies have been used for monitoring patients' health with wireless wearable sensors in different scenarios and medical conditions, such as noncommunicable and infectious diseases. Combining IoT-related technologies with early-warning scores (EWS) commonly utilized in infirmaries has the potential to enhance health services delivery significantly. Specifically, the NEWS-2 has been showing remarkable results in detecting the health deterioration of COVID-19 patients. Although the literature presents several approaches for remote monitoring, none of these studies proposes a customized, complete, and integrated architecture that uses an effective early-detection mechanism for COVID-19 and that is flexible enough to be used in hospital wards and at home. Therefore, this article's objective is to present a comprehensive IoT-based conceptual architecture that addresses the key requirements of scalability, interoperability, network dynamics, context discovery, reliability, and privacy in the context of remote health monitoring of COVID-19 patients in hospitals and at home. Since remote monitoring of patients at home (essential during a pandemic) can engender trust issues regarding secure and ethical data collection, a consent management module was incorporated into our architecture to provide transparency and ensure data privacy. Further, the article details mechanisms for supporting a configurable and adaptable scoring system embedded in wearable devices to increase usefulness and flexibility for health care professions working with EWS., Competing Interests: The authors declare no conflict of interest., (© 2021 The Authors. Published by Elsevier B.V.)
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- 2022
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181. Real-time data analysis in health monitoring systems: A comprehensive systematic literature review.
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Paganelli AI, Mondéjar AG, da Silva AC, Silva-Calpa G, Teixeira MF, Carvalho F, Raposo A, and Endler M
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- Algorithms, Data Mining methods, Monitoring, Physiologic, Data Analysis, Machine Learning
- Abstract
Health monitoring systems (HMSs) capture physiological measurements through biosensors (sensing), obtain significant properties and measures from the output signal (perceiving), use algorithms for data analysis (reasoning), and trigger warnings or alarms (acting) when an emergency occurs. These systems have the potential to enhance health care delivery in different application domains, showing promising benefits for health diagnosis, early symptom detection, disease prediction, among others. However, the implementation of HMS presents challenges for sensing, perceiving, reasoning, and acting based on monitored data, mainly when data processing should be performed in real time. Thus, the quality of these diagnoses relies heavily on the data and data analysis methods applied. Data mining techniques have been broadly investigated in health systems; however, it is not clear what real-time data analysis techniques are best suited for each context. This work carries out a search in five scientific electronic databases to identify recent studies that investigated HMS using real-time data analysis techniques. Thirty-six research studies were selected after screening 2,822 works. Applied data analysis methods, application domains, utilized sensors, physiological parameters, extracted features, claimed benefits, limitations, datasets used, and published results were described, compared and analyzed. The findings indicate that machine learning methods are trending in such studies. There is no universal solution for all health domains; however, support vector machines are a predominant method. Among the application domains, cardiovascular disease is the most investigated. Most reviewed studies reported improvements in performing data mining tasks or operational modes of solutions. Although studies tested algorithms and presented promising results, those are particular for each experiment. This review gives a comprehensive overview of HMS real-time data analysis and points to directions for future research., (Copyright © 2022 Elsevier Inc. All rights reserved.)
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- 2022
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182. Why women choose abortion through telemedicine outside the formal health sector in Germany: a mixed-methods study.
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Killinger K, Günther S, Gomperts R, Atay H, and Endler M
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- Adolescent, Aged, Cross-Sectional Studies, Female, Germany, Humans, Pregnancy, Abortion, Induced, Abortion, Spontaneous, Telemedicine
- Abstract
Introduction: Women on Web (WoW) is a global medical abortion telemedicine service operating outside the formal health sector. In April 2019 they opened their helpdesk to Germany. Our aim was to understand the motivations, and perceived barriers to access, for women who choose telemedicine abortion outside the formal health sector in Germany., Methods: We conducted a parallel convergent mixed-methods study among 1090 women consulting WoW from Germany between 1 January and 31 December 2019. We performed a cross-sectional study of data contained in online consultations and a content analysis of 108 email texts. Analysis was done until saturation; results were merged and triangulation used to validate results., Results: The quantitative analysis found that the need for secrecy (n=502, 48%) and the wish for privacy (n=500, 48%) were frequent reasons for choosing telemedicine abortion. Adolescents were more likely to report secrecy, cost, stigma and legal restrictions as reasons for using telemedicine abortion compared with older women. The content analysis developed two main themes and seven subsidiary categories, (1) internal motivations for seeking telemedicine abortion encompassing (i) autonomy, (ii) perception of external threat and (iii) shame and stigma, and (2) external barriers to formal abortion care encompassing (iv) financial stress, (v) logistic barriers to access, (vi) provider attitudes and (vii) vulnerability of foreigners., Conclusions: Women in Germany who choose telemedicine abortion outside the formal health sector do so both from a place of empowerment and a place of disempowerment. Numerous barriers to abortion access exist in the formal sector which are of special relevance to vulnerable groups such as adolescents and undocumented immigrants., Competing Interests: Competing interests: Coauthors RG, SG and HA work for or are affiliated with Women on Web., (© Author(s) (or their employer(s)) 2022. No commercial re-use. See rights and permissions. Published by BMJ.)
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- 2022
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183. Immediate versus delayed insertion of the copper intrauterine device after medical abortion at 17-20 gestational weeks: a randomised controlled trial.
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Constant D, Endler M, Grossman D, Petro G, and Patel M
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- Female, Humans, Pregnancy, South Africa, Abortion, Induced adverse effects, Abortion, Spontaneous, Intrauterine Devices, Intrauterine Devices, Copper adverse effects
- Abstract
Introduction: This trial reports on use of the copper intrauterine device (IUD) after immediate compared with delayed insertion following medical abortion at 17-20 gestational weeks (GW)., Methods: This randomised controlled trial was conducted at one tertiary hospital and five community healthcare centres in Cape Town, South Africa. Eligible consenting women were randomised to immediate (within 24 hours) or delayed (3 weeks post-abortion) insertion of the copper IUD. Follow-up was at 6 weeks, 3 months and 6 months. Main outcomes were use of the original IUD and use of any IUD, including replacement IUDs at 6 weeks post-abortion. Secondary outcomes included rates of expulsion and malposition at 6 weeks, use of any IUD at 3 and 6 months, and acceptability of the IUD., Results: We recruited and randomised 114 women admitted for elective medical abortion between August 2018 and June 2019. In the immediate and delayed study arms, respectively, 45/55 (82%) and 12/57 (21%) women received the IUD as planned. By intention-to-treat, 56% in the immediate and 19% in the delayed arms were using the original IUD at 6 weeks (p<0.001), and 76% in the immediate and 40% in the delayed arms were using any IUD (p<0.001). Complete expulsion or removal occurred in 32% in the immediate and 7% in the delayed arms (p=0.044)., Conclusions: Insertion of an IUD immediately after medical abortion at 17-20 GW results in increased use after 6 weeks compared with delayed insertion, however expulsion rates are higher than with interval insertion., Clinical Trials Registration: NCT03505047), Pan African Trials Registry (www.pactr.org), 201804003324963., Competing Interests: Competing interests: None declared., (© Author(s) (or their employer(s)) 2022. No commercial re-use. See rights and permissions. Published by BMJ.)
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- 2022
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184. Immediate IUD insertion after second trimester abortion: implications for service delivery.
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Somefun O, Constant D, and Endler M
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- Contraception, Female, Humans, Pregnancy, Pregnancy Trimester, Second, Abortion, Induced, Abortion, Spontaneous, Intrauterine Devices
- Abstract
Background: The availability of modern contraception including long-acting reversible contraceptives (LARC), is a fundamental component of postabortion care. Findings from a recent randomized controlled trial (RCT) in South Africa comparing immediate to delayed insertion of the copper intrauterine device (IUD) after medical abortion (MA) at 17-20 gestational weeks showed that immediate insertion resulted in higher IUD use at 6 weeks postabortion, but that expulsion rates were significantly higher than for delayed insertion. This study aims to explore barriers, facilitators, and context-specific factors relevant to the implementation of immediate IUD provision after second trimester medical abortion., Methods: We performed a qualitative study alongside the RCT in which we conducted in-depth interviews with 14 staff providing healthcare to study participants and 24 study participants. Research questions explored barriers and facilitators to implementation of immediate IUD insertion, contraceptive decision-making, and the impact of context and supplementary trial activities on service provision. Interviews were recorded and transcribed, with translation into English if needed. We performed a triangulated thematic analysis at the level of the transcribed interview text., Results: Contraceptive counselling at the abortion facility by a study nurse improved knowledge, corrected misconceptions, and increased demand for the IUD postabortion. Women expressed a clear preference for immediate insertion. Convenience, protection from pregnancy and privacy issues were paramount and women expressed preference for engagement with staff who knew their abortion history, and with whom they had an established connection. Doctors and nurses were generally in favour of immediate insertion and said it could be incorporated into standard care if women wanted this. This contrasted with the need for interventions by the research team to reinforce adherence by staff to provide contraception as allocated during the trial., Conclusions: Women and staff favour immediate IUD insertion after second trimester medical abortion, but service delivery may require structures that ensure timely insertion postabortion, continuity of care, communication that mitigates loss to follow-up and training of staff to ensure competence., (© 2021. The Author(s).)
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- 2021
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185. Global research priorities for COVID-19 in maternal, reproductive and child health: Results of an international survey.
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Etti M, Alger J, Salas SP, Saggers R, Ramdin T, Endler M, Gemzell-Danielsson K, Alfvén T, Ahmed Y, Callejas A, Eskenazi D, Khalil A, and Le Doare K
- Subjects
- Adult, Child, Child, Preschool, Female, Humans, Infant, Infant, Newborn, Pregnancy, COVID-19 epidemiology, Child Health, Maternal Health, Pandemics, Reproductive Health, SARS-CoV-2
- Abstract
Background: The World Health Organization's "Coordinated Global Research Roadmap: 2019 Novel Coronavirus" outlined the need for research that focuses on the impact of COVID-19 on pregnant women and children. More than one year after the first reported case significant knowledge gaps remain, highlighting the need for a coordinated approach. To address this need, the Maternal, Newborn and Child Health Working Group (MNCH WG) of the COVID-19 Clinical Research Coalition conducted an international survey to identify global research priorities for COVID-19 in maternal, reproductive and child health., Method: This project was undertaken using a modified Delphi method. An electronic questionnaire was disseminated to clinicians and researchers in three different languages (English, French and Spanish) via MNCH WG affiliated networks. Respondents were asked to select the five most urgent research priorities among a list of 17 identified by the MNCH WG. Analysis of questionnaire data was undertaken to identify key similarities and differences among respondents according to questionnaire language, location and specialty. Following elimination of the seven lowest ranking priorities, the questionnaire was recirculated to the original pool of respondents. Thematic analysis of final questionnaire data was undertaken by the MNCH WG from which four priority research themes emerged., Results: Questionnaire 1 was completed by 225 respondents from 29 countries. Questionnaire 2 was returned by 49 respondents. The four priority research themes which emerged from the analysis were 1) access to healthcare during the COVID-19 pandemic, 2) the direct and 3) indirect effects of COVID-19 on pregnant and breastfeeding women and children and 4) the transmission of COVID-19 and protection from infection., Conclusion: The results of these questionnaires indicated a high level of concordance among continents and specialties regarding priority research themes. This prioritized list of research uncertainties, developed to specifically highlight the most urgent clinical needs as perceived by healthcare professionals and researchers, could help funding organizations and researchers to answer the most pressing questions for clinicians and public health professionals during the pandemic. It is hoped that these identified priority research themes can help focus the discussion regarding the allocation of limited resources to enhance COVID-19 research in MNCH globally., Competing Interests: The authors have declared that no competing interests exist.
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- 2021
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186. How the coronavirus disease 2019 pandemic is impacting sexual and reproductive health and rights and response: Results from a global survey of providers, researchers, and policy-makers.
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Endler M, Al-Haidari T, Benedetto C, Chowdhury S, Christilaw J, El Kak F, Galimberti D, Garcia-Moreno C, Gutierrez M, Ibrahim S, Kumari S, McNicholas C, Mostajo Flores D, Muganda J, Ramirez-Negrin A, Senanayake H, Sohail R, Temmerman M, and Gemzell-Danielsson K
- Subjects
- Adolescent, Adult, Female, Humans, Middle Aged, Pregnancy, SARS-CoV-2, Sexism statistics & numerical data, Surveys and Questionnaires, COVID-19 epidemiology, Global Health, Health Services Accessibility trends, Pandemics, Reproductive Health
- Abstract
Introduction: We aimed to give a global overview of trends in access to sexual and reproductive health and rights (SRHR) during the coronavirus disease 2019 (COVID-19) pandemic and what is being done to mitigate its impact., Material and Methods: We performed a descriptive analysis and content analysis based on an online survey among clinicians, researchers, and organizations. Our data were extracted from multiple-choice questions on access to SRHR services and risk of SRHR violations, and written responses to open-ended questions on threats to access and required response., Results: The survey was answered by 51 people representing 29 countries. Eighty-six percent reported that access to contraceptive services was less or much less because of COVID-19, corresponding figures for surgical and medical abortion were 62% and 46%. The increased risk of gender-based and sexual violence was assessed as moderate or severe by 79%. Among countries with mildly restrictive abortion policies, 69% had implemented changes to facilitate access to abortion during the pandemic, compared with none among countries with severe restrictions (P < .001), 87.5% compared with 46% had implemented changes to facilitate access to contraception (P = .023). The content analysis showed that (a) prioritizations in health service delivery at the expense of SRHR, (b) lack of political will, (c) the detrimental effect of lockdown, and (d) the suspension of sexual education, were threats to SRHR access (theme 1). Requirements to mitigate these threats (theme 2) were (a) political will and support of universal access to SRH services, (b) the sensitization of providers, (c) free public transport, and (d) physical protective equipment. A contrasting third theme was the state of exception of the COVID-19 pandemic as a window of opportunity to push forward women's health and rights., Conclusions: Many countries have seen decreased access to and increased violations of SRHR during the COVID-19 pandemic. Countries with severe restrictions on abortion seem less likely to have implemented changes to SRHR delivery to mitigate this impact. Political will to support the advancement of SRHR is often lacking, which is fundamental to ensuring both continued access and, in a minority of cases, the solidification of gains made to SRHR during the pandemic., (© 2020 The Authors. Acta Obstetricia et Gynecologica Scandinavica published by John Wiley & Sons Ltd on behalf of Nordic Federation of Societies of Obstetrics and Gynecology (NFOG).)
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- 2021
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187. Recognizing Context-Aware Human Sociability Patterns Using Pervasive Monitoring for Supporting Mental Health Professionals.
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de Moura IR, Teles AS, Endler M, Coutinho LR, and da Silva E Silva FJ
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- Humans, Surveys and Questionnaires, Health Personnel, Mental Health, Social Behavior
- Abstract
Traditionally, mental health specialists monitor their patients' social behavior by applying subjective self-report questionnaires in face-to-face meetings. Usually, the application of the self-report questionnaire is limited by cognitive biases (e.g., memory bias and social desirability). As an alternative, we present a solution to detect context-aware sociability patterns and behavioral changes based on social situations inferred from ubiquitous device data. This solution does not focus on the diagnosis of mental states, but works on identifying situations of interest to specialized professionals. The proposed solution consists of an algorithm based on frequent pattern mining and complex event processing to detect periods of the day in which the individual usually socializes. Social routine recognition is performed under different context conditions to differentiate abnormal social behaviors from the variation of usual social habits. The proposed solution also can detect abnormal behavior and routine changes. This solution uses fuzzy logic to model the knowledge of the mental health specialist necessary to identify the occurrence of behavioral change. Evaluation results show that the prediction performance of the identified context-aware sociability patterns has strong positive relation (Pearson's correlation coefficient >70%) with individuals' social routine. Finally, the evaluation conducted recognized that the proposed solution leading to the identification of abnormal social behaviors and social routine changes consistently.
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- 2020
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188. How task-sharing in abortion care became the norm in Sweden: A case study of historic and current determinants and events.
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Endler M, Cleeve A, Sääv I, and Gemzell-Danielsson K
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- Female, Humans, Physicians organization & administration, Pregnancy, Sweden, Abortion, Induced legislation & jurisprudence, Abortion, Legal legislation & jurisprudence, Midwifery organization & administration
- Abstract
We performed a country case study using thematic analysis of interviews and existing grey and published literature to identify facilitators and barriers to the implementation of midwife-provided abortion care in Sweden. Identified facilitating factors were: (1) the historical role and high status of Swedish midwives; (2) Swedish research and development of medical abortion that enabled an enlarged clinical role for midwives; (3) collaborations between individual clinicians and researchers within the professional associations, and the autonomy of clinical units to implement changes in clinical practice; (4) a historic precedent of changes in abortion policy occurring without prior official or legal sanction; (5) a context of liberal abortion laws, secularity, gender equality, public support for abortion, trust in public institutions; and (6) an increasing global interest in task-shifting to increase access and reduce costs. Identified barriers/risks were: (1) the lack of systems for monitoring and evaluation; and (2) a loss of physician competence in abortion care., (© 2020 World Health Organization; licensed by John Wiley & Sons Ltd on behalf of International Federation of Gynecology and Obstetrics.)
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- 2020
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189. Mental health ubiquitous monitoring supported by social situation awareness: A systematic review.
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Moura I, Teles A, Silva F, Viana D, Coutinho L, Barros F, and Endler M
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- Awareness, Health Personnel, Humans, Social Behavior, Mental Health, Mental Health Services
- Abstract
Traditionally, the process of monitoring and evaluating social behavior related to mental health has based on self-reported information, which is limited by the subjective character of responses and various cognitive biases. Today, however, there is a growing amount of studies that have provided methods to objectively monitor social behavior through ubiquitous devices and have used this information to support mental health services. In this paper, we present a Systematic Literature Review (SLR) to identify, analyze and characterize the state of the art about the use of ubiquitous devices to monitor users' social behavior focused on mental health. For this purpose, we performed an exhaustive literature search on the six main digital libraries. A screening process was conducted on 160 peer-reviewed publications by applying suitable selection criteria to define the appropriate studies to the scope of this SLR. Next, 20 selected studies were forwarded to the data extraction phase. From an analysis of the selected studies, we recognized the types of social situations identified, the process of transforming contextual data into social situations, the use of social situation awareness to support mental health monitoring, and the methods used to evaluate proposed solutions. Additionally, we identified the main trends presented by this research area, as well as open questions and perspectives for future research. Results of this SLR showed that social situation-aware ubiquitous systems represent promising assistance tools for patients and mental health professionals. However, studies still present limitations in methodological rigor and restrictions in experiments, and solutions proposed by them have limitations to be overcome., Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2020 Elsevier Inc. All rights reserved.)
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- 2020
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190. Design and characteristics of a low-frequency magnetic probe for magnetic profile measurements at Wendelstein 7-X.
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Knieps A, Liang Y, Drews P, Endler M, Grulke O, Huang Z, Killer C, Liu S, Nicolai D, Rahbarnia K, Sandri N, and Satheeswaran G
- Abstract
Equilibrium analysis in fusion devices usually relies on plasma pressure profiles and magnetic measurements outside the plasma. The kinetic profiles can give indirect information about the equilibrium magnetic field, while the stationary magnetic diagnostics cannot resolve current distributions on a smaller scale. This work presents a reciprocating magnetic probe, designed to provide direct plasma response measurements of the magnetic field in the scrape-off layer of Wendelstein 7-X. Hardware design and frequency characteristics are discussed, and a post-processing technique for extending the lower frequency cutoff of the integration scheme is presented.
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- 2020
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191. The Langmuir probe system in the Wendelstein 7-X test divertor.
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Rudischhauser L, Endler M, Höfel U, Hammond KC, Kallmeyer JP, and Blackwell BD
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The design and evaluation of the Langmuir probe system used in the first divertor operation phase of Wendelstein 7-X is described. The probes are integrated into the target plates and have individually facetted surfaces to keep the angle of incidence of the magnetic field within an appropriate range for different magnetic configurations. Multiple models for the derivation of plasma parameters from current-voltage characteristics are introduced. These are analyzed with regard to their assumptions and limitations, generalized, and adapted to our use case. A detailed comparison is made to determine the most suitable model. It is found that the choice of model has a large impact, for example, resulting in a change in the inferred temperatures of up to a factor two. This evaluation is implemented in a Bayesian modeling framework and automated to allow for joint analysis with other diagnostics and a replacement of ad hoc assumptions. We rigorously treat parameter uncertainties, revealing strong correlations between them. General and flexible model formulations permit an expansion to additional effects.
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- 2020
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192. Sexual and reproductive health and rights of refugee and migrant women: gynecologists' and obstetricians' responsibilities.
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Endler M, Al Haidari T, Chowdhury S, Christilaw J, El Kak F, Galimberti D, Gutierrez M, Ramirez-Negrin A, Senanayake H, Sohail R, Temmerman M, and Danielsson KG
- Subjects
- Adolescent, Adult, Child, Female, Global Health, Gynecology standards, Humans, International Cooperation, Obstetrics standards, Sexual Health standards, Sustainable Development, Women's Health, Refugees, Reproductive Health standards, Reproductive Rights standards, Transients and Migrants
- Abstract
Ensuring universal access to sexual and reproductive healthcare services is Target 3.7 of the United Nations Sustainable Development Goals (SDG). Refugee and migrant women and children are at particular risk of being forgotten in the global momentum to achieve this target. In this article we discuss the violations of sexual and reproductive health and rights (SRHR) of particular relevance to the refugee and migrant reality. We give context-specific examples of denial of health services to vulnerable groups; lack of dignity as a barrier to care; the vulnerability of adolescents; child marriage; weaponized rape; gender-based violence; and sexual trafficking. We discuss rights frameworks and models that are being used in response to these situations, as well as what remains to be done. Specifically, we call for obstetricians and gynecologists to act as individual providers and through their FIGO member societies to protect women's health and rights in these exposed settings., (© 2020 International Federation of Gynecology and Obstetrics.)
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- 2020
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193. Online access to abortion medications: a review of utilization and clinical outcomes.
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Endler M, Cleeve A, and Gemzell-Danielsson K
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- Female, Humans, Internet, Maternal Mortality, Mifepristone administration & dosage, Mifepristone supply & distribution, Pregnancy, Quality of Health Care, Abortifacient Agents administration & dosage, Abortifacient Agents supply & distribution, Abortion, Induced, Health Services Accessibility, Misoprostol administration & dosage, Misoprostol supply & distribution, Telemedicine
- Abstract
We performed a search in PubMed and Web of Science on the self-use of abortion medication after online access. Studies published between January 1, 1995, and March 31, 2019, were considered. We included studies of online services that were (i) led by healthcare staff (n = 14), (ii) led by non-healthcare staff (n = 4), and (iii) providing noninteractive access (n = 17). Our outcomes were utilization (frequency and demand for services), acceptability for women, safety, and success rate. Key findings: Women are increasingly using the Internet to access abortion medication. Available services are of varying quality. Women accessing noninteractive services report feelings of distress related to the lack of medical guidance, and the demand for interactive guidance through the abortion process is high. Women using services led by healthcare staff report high rates of satisfaction and similar rates of clinical outcomes as those of in-person abortion care., (Copyright © 2019. Published by Elsevier Ltd.)
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- 2020
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194. Telemedicine for medical abortion: a systematic review.
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Endler M, Lavelanet A, Cleeve A, Ganatra B, Gomperts R, and Gemzell-Danielsson K
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- Abortion, Induced methods, Adult, Female, Gestational Age, Humans, Pregnancy, Qualitative Research, Self Report, Telemedicine methods, Abortion, Induced statistics & numerical data, Patient Acceptance of Health Care statistics & numerical data, Patient Satisfaction statistics & numerical data, Telemedicine statistics & numerical data
- Abstract
Background: Telemedicine is increasingly being used to access abortion services., Objective: To assess the success rate, safety, and acceptability for women and providers of medical abortion using telemedicine., Search Strategy: We searched PubMed, EMBASE, ClinicalTrials.gov, and Web of Science up until 10 November 2017., Study Criteria: We selected studies where telemedicine was used for comprehensive medical abortion services, i.e. assessment/counselling, treatment, and follow up, reporting on success rate (continuing pregnancy, complete abortion, and surgical evacuation), safety (rate of blood transfusion and hospitalisation) or acceptability (satisfaction, dissatisfaction, and recommendation of the service)., Data Collection and Analysis: Quantitative outcomes were summarised as a range of median rates. Qualitative data were summarised in a narrative synthesis., Main Results: Rates relevant to success rate, safety, and acceptability outcomes for women ≤10
+0 weeks' gestation (GW) ranged from 0 to 1.9% for continuing pregnancy, 93.8 to 96.4% for complete abortion, 0.9 to 19.3% for surgical evacuation, 0 to 0.7% for blood transfusion, 0.07 to 2.8% for hospitalisation, 64 to 100% for satisfaction, 0.2 to 2.3% for dissatisfaction, and 90 to 98% for recommendation of the service. Rates in studies also including women >10+0 GW ranged from 1.3 to 2.3% for continuing pregnancy, 8.5 to 20.9% for surgical evacuation, and 90 to 100% for satisfaction. Qualitative studies on acceptability showed no negative impacts for women or providers., Conclusion: Based on a synthesis of mainly self-reported data, medical abortion through telemedicine seems to be highly acceptable to women and providers, success rate and safety outcomes are similar to those reported in literature for in-person abortion care, and surgical evacuation rates are higher., Tweetable Abstract: A systematic review of medical abortion through telemedicine shows outcome rates similar to in-person care., (© 2019 World Health Organization; licensed by John Wiley & Sons Ltd on behalf of Royal College of Obstetricians and Gynaecologists.)- Published
- 2019
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195. Placental location and pregnancy outcomes in nulliparous women: A population-based cohort study.
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Granfors M, Stephansson O, Endler M, Jonsson M, Sandström A, and Wikström AK
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- Adult, Female, Humans, Infant, Newborn, Live Birth, Parity, Placenta Previa epidemiology, Pregnancy, Pregnancy Complications epidemiology, Sweden epidemiology, Placenta anatomy & histology, Pregnancy Outcome epidemiology
- Abstract
Introduction: The impact of placenta previa on pregnancy, delivery and infant outcomes has been extensively studied. However, less is known about the possible association of placental location other than previa with pregnancy outcomes. The aim of this study was to investigate if placental location other than previa is associated with adverse pregnancy, delivery and infant outcomes., Material and Methods: This is a population-based cohort study, with data from the regional population-based Stockholm-Gotland Obstetric Cohort, Sweden, from 2008 to 2014. The study population included 74 087 nulliparous women with singleton pregnancies resulting in live-born infants, with information about placental location from the second-trimester ultrasound screening. The association between placental location (fundal, lateral, anterior or posterior) and pregnancy outcomes was estimated using logistic regression analysis. Odds ratios (OR) with 95% confidence intervals (95% CI) were calculated, and adjustments were made for maternal age, height, country of birth, smoking in early pregnancy, sex of the infant and in vitro fertilization. Main outcome measures were pregnancy, delivery and infant outcomes., Results: Compared with posterior placental location, fundal and lateral placental locations were associated with a number of adverse pregnancy outcomes, the most important being: very preterm birth (<32 weeks of gestation) (adjusted OR [aOR] 1.78, 95% CI 1.18-2.63 and aOR 2.12, 95% CI 1.39-2.25, respectively), moderate preterm birth (32-36 weeks of gestation) (aOR 1.23, 95% CI 1.001-1.51 and aOR 1.62, 95% CI 1.32-2.00, respectively), small-for-gestational-age birth (aOR 1.67, 95% CI 1.34-2.07 and aOR 1.77, 95% CI 1.39-2.25, respectively) and manual removal of the placenta in vaginal births (aOR 3.27, 95% CI 2.68-3.99 and aOR 3.27, 95% CI 2.60-4.10, respectively). Additionally, lateral placental location was associated with preeclampsia (aOR 1.30, 95% CI 1.03-1.65) and severe postpartum hemorrhage (aOR 1.42, 95% CI 1.27-1.82)., Conclusions: Compared with posterior placental location, fundal and lateral placental locations are associated with a number of adverse pregnancy, delivery and infant outcomes., (© 2019 Nordic Federation of Societies of Obstetrics and Gynecology.)
- Published
- 2019
- Full Text
- View/download PDF
196. Safety and acceptability of medical abortion through telemedicine after 9 weeks of gestation: a population-based cohort study.
- Author
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Endler M, Beets L, Gemzell Danielsson K, and Gomperts R
- Subjects
- Abortifacient Agents administration & dosage, Abortion, Induced methods, Adolescent, Adult, Female, Gestational Age, Humans, Middle Aged, Odds Ratio, Patient Satisfaction, Poland epidemiology, Pregnancy, Retrospective Studies, Treatment Outcome, Uterine Hemorrhage chemically induced, Young Adult, Abortifacient Agents adverse effects, Abortion, Induced adverse effects, Aftercare statistics & numerical data, Telemedicine methods, Uterine Hemorrhage epidemiology
- Abstract
Objective: To assess the safety and acceptability of abortion through telemedicine at >9
+0 weeks of gestation., Design: Cohort study., Setting: Poland., Population: Six hundred and fifteen women who requested and underwent a abortion through telemedicine from 1 June to 31 December 2016., Methods: Risks of adverse outcomes were calculated as adjusted odds ratios (aORs) with 95% confidence intervals (95% CIs) by unconditional logistic regression according to gestational age at abortion: ≤9 or >9 weeks of gestation., Main Outcome Measures: Self-reported clinical visits for complaints related to the abortion within 0-1 days of the treatment, heavy bleeding, pain or bleeding more than expected, and low satisfaction., Results: Among women undergoing a abortion at ≤9 or >9 weeks of gestation, 3.3 versus 11.7% went to hospital with concerns within 0-1 days of the termination (aOR 3.82, 95% CI 1.90-7.69). Among women undergoing a abortion from 11+1 to 14+2 weeks of gestation, the rate was 22.5% (aOR 9.20, 95% CI 3.58-23.60). Among women undergoing a abortion at ≤9 or >9 weeks of gestation, the rate of heavy bleeding was 6.8 versus 10.1% (aOR 1.65, 95% CI 0.90-3.04), the rate of low satisfaction was 2.4 versus 1.6% (aOR 0.69, 95% CI 0.14-3.36), the rate of bleeding more than expected was 45.6 versus 57.8% (aOR 1.26, 95% CI 0.78-2.02), and the rate of pain more than expected was 35.6 versus 38.8% (aOR 1.11, 95% CI 0.71-1.71)., Conclusions: Medical abortion through telemedicine at >9 weeks of gestation is associated with a higher risk of same-day or day-after clinical visits for concerns related to the procedure, and this risk increases with gestational age. Self-reported rates of heavy bleeding, low satisfaction, or unmet expectations with medical abortion do not increase with gestational age., Tweetable Abstract: A cohort study shows that abortion through telemedicine at >9 weeks of gestation is associated with more hospital visits but not with increased bleeding., (© 2018 Royal College of Obstetricians and Gynaecologists.)- Published
- 2019
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197. The inherited risk of retained placenta: a population based cohort study.
- Author
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Endler M, Cnattingius S, Granfors M, and Wikström AK
- Subjects
- Adult, Cohort Studies, Female, Humans, Infant, Newborn, Logistic Models, Male, Odds Ratio, Pregnancy, Registries, Risk Factors, Sweden epidemiology, Young Adult, Genetic Predisposition to Disease epidemiology, Maternal Inheritance, Paternal Inheritance, Placenta, Retained genetics
- Abstract
Objective: To investigate whether retained placenta in the first generation is associated with an increased risk of retained placenta in the second generation., Design: Population-based cohort study., Setting: Sweden., Population: Using linked generational data from the Swedish Medical Birth Register 1973-2012, we identified 494 000 second-generation births with information on the birth of the mother (first-generation index birth). For 292 897 of these births there was information also on the birth of the father., Methods: Risk of retained placenta in the second generation was calculated as adjusted odds ratios (aOR) by unconditional logistic regression with 95% confidence intervals (95% CI) according to whether retained placenta occurred in a first generation birth or not., Main Outcome: Retained placenta in the second generation., Results: The risk of retained placenta in a second-generation birth was increased if retained placenta had occurred at the mother's own birth (aOR 1.66, 95% CI 1.52-1.82), at the birth of one of her siblings (aOR 1.58, 95% CI 1.43-1.76) or both (aOR 2.75, 95% CI 2.18-3.46). The risk was slightly increased if retained placenta had occurred at the birth of the father (aOR 1.23, 95% CI 1.07-1.41). For preterm births in both generations, the risk of retained placenta in the second generation was increased six-fold if retained placenta had occurred at the mother's birth (OR 6.55, 95% CI 2.68-16.02)., Conclusion: There is an intergenerational recurrence of retained placenta on the maternal and most likely also on the paternal side. The recurrence risk seems strongest in preterm pregnancies., Tweetable Abstract: A population-based cohort study suggests that there is an intergenerational recurrence of retained placenta., (© 2017 Royal College of Obstetricians and Gynaecologists.)
- Published
- 2018
- Full Text
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198. A Middleware with Comprehensive Quality of Context Support for the Internet of Things Applications.
- Author
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Gomes BTP, Muniz LCM, da Silva E Silva FJ, Dos Santos DV, Lopes RF, Coutinho LR, Carvalho FO, and Endler M
- Abstract
Context aware systems are able to adapt their behavior according to the environment in which the user is. They can be integrated into an Internet of Things (IoT) infrastructure, allowing a better perception of the user's physical environment by collecting context data from sensors embedded in devices known as smart objects. An IoT extension called the Internet of Mobile Things (IoMT) suggests new scenarios in which smart objects and IoT gateways can move autonomously or be moved easily. In a comprehensive view, Quality of Context (QoC) is a term that can express quality requirements of context aware applications. These requirements can be those related to the quality of information provided by the sensors (e.g., accuracy, resolution, age, validity time) or those referring to the quality of the data distribution service (e.g, reliability, delay, delivery time). Some functionalities of context aware applications and/or decision-making processes of these applications and their users depend on the level of quality of context available, which tend to vary over time for various reasons. Reviewing the literature, it is possible to verify that the quality of context support provided by IoT-oriented middleware systems still has limitations in relation to at least four relevant aspects: (i) quality of context provisioning; (ii) quality of context monitoring; (iii) support for heterogeneous device and technology management; (iv) support for reliable data delivery in mobility scenarios. This paper presents two main contributions: (i) a state-of-the-art survey specifically aimed at analyzing the middleware with quality of context support and; (ii) a new middleware with comprehensive quality of context support for Internet of Things Applications. The proposed middleware was evaluated and the results are presented and discussed in this article, which also shows a case study involving the development of a mobile remote patient monitoring application that was developed using the proposed middleware. This case study highlights how middleware components were used to meet the quality of context requirements of the application. In addition, the proposed middleware was compared to other solutions in the literature., Competing Interests: The authors declare no conflict of interest.
- Published
- 2017
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199. Enriching Mental Health Mobile Assessment and Intervention with Situation Awareness.
- Author
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Soares Teles A, Rocha A, José da Silva E Silva F, Correia Lopes J, O'Sullivan D, Van de Ven P, and Endler M
- Subjects
- Awareness, Humans, Mental Disorders, Mobile Applications, Mental Health
- Abstract
Current mobile devices allow the execution of sophisticated applications with the capacity for identifying the user situation, which can be helpful in treatments of mental disorders. In this paper, we present SituMan , a solution that provides situation awareness to MoodBuster , an ecological momentary assessment and intervention mobile application used to request self-assessments from patients in depression treatments. SituMan has a fuzzy inference engine to identify patient situations using context data gathered from the sensors embedded in mobile devices. Situations are specified jointly by the patient and mental health professional, and they can represent the patient's daily routine (e.g., "studying", "at work", "working out"). MoodBuster requests mental status self-assessments from patients at adequate moments using situation awareness. In addition, SituMan saves and displays patient situations in a summary, delivering them for consultation by mental health professionals. A first experimental evaluation was performed to assess the user satisfaction with the approaches to define and identify situations. This experiment showed that SituMan was well evaluated in both criteria. A second experiment was performed to assess the accuracy of the fuzzy engine to infer situations. Results from the second experiment showed that the fuzzy inference engine has a good accuracy to identify situations., Competing Interests: The authors declare no conflict of interest.
- Published
- 2017
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200. Oxidative stress and inflammation in retained placenta: a pilot study of protein and gene expression of GPX1 and NFκB.
- Author
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Endler M, Saltvedt S, Eweida M, and Åkerud H
- Subjects
- Adult, Biomarkers metabolism, Case-Control Studies, Female, Gene Expression, Humans, Inflammation genetics, Inflammation metabolism, Oxidative Stress genetics, Pilot Projects, Pregnancy, Prospective Studies, Young Adult, Glutathione Peroxidase GPX1, Glutathione Peroxidase genetics, Glutathione Peroxidase metabolism, NF-kappa B genetics, NF-kappa B metabolism, Placenta, Retained genetics, Placenta, Retained metabolism
- Abstract
Background: Retained placenta is associated with severe postpartum hemorrhage. Its etiology is unknown and its biochemistry has not been studied. We aimed to assess whether levels of the antioxidative enzyme Glutathione Peroxidase 1 (GPX1) and the transcription factor Nuclear Factor κβ (NFκβ), as markers of oxidative stress and inflammation, were affected in retained placentas compared to spontaneously released placentas from otherwise normal full term pregnancies., Methods: In a pilot study we assessed concentrations of GPX1 by ELISA and gene (mRNA) expression of GPX1, NFκβ and its inhibitor Iκβα, by quantitative real-time-PCR in periumbilical and peripheral samples from retained (n = 29) and non-retained (n = 31) placental tissue., Results: Median periumbilical GPX1 concentrations were 13.32 ng/ml in retained placentas and 17.96 ng/ml in non-retained placentas (p = 0.22), peripheral concentrations were 13.27 ng/ml and 19.09 ng/ml (p = 0.08). Retained placental tissue was more likely to have a low GPX1 protein concentration (OR 3.82, p = 0.02 for periumbilical and OR 3.95, p = 0.02 for peripheral samples). Median periumbilical GPX1 gene expressions were 1.13 for retained placentas and 0.88 for non-retained placentas (p = 0.08), peripheral expression was 1.32 and 1.18 (p = 0.46). Gene expressions of NFκβ and Iκβα were not significantly different between retained and non-retained placental tissue., Conclusions: Women with retained placenta were more likely to have a low level of GPX1 protein concentration in placental tissue compared to women without retained placenta and retained placental tissue showed a tendency of lower median concentrations of GPX1 protein expression. This may indicate decreased antioxidative capacity as a component in this disorder but requires a larger sample to corroborate results.
- Published
- 2016
- Full Text
- View/download PDF
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