139 research outputs found
Oceanic terranes of S-Central America - 200 Million years of accretion history recorded on the W-edge of the Caribbean Plate
Polyphyletism and parallel evolution in Foraminifera and their implications in biostratigraphy. Two new examples from the Priabonian of the Helvetic Alps
Schistes Lustrés in a hyper-extended continental margin setting and reinterpretation of the limit between the Mont Fort and Tsaté nappes (Middle and Upper Penninics, Western Swiss Alps)
Larger benthic foraminifera from the Azuero Peninsula (SW-Panama) define Eocene accretionary events and an arc gap along the trailing edge of the Caribbean Plate
Rafting on macro-algae (Sargassum) of symbiont-bearing Larger Benthic Foraminifera, key to their dispersal in recent and ancient oceans
Palaeocene to Oligocene Foraminifera from the Azuero Peninsula (Panama): The timing of seamount formation, accretion and forearc overlap, along the Mid American Margin.
Cefalea post- punción dural
Post-dural puncture headache (HPDP) is a widely known pathology, which occurs as the main complication after performing a diagnostic and treatment procedure which is spinal puncture, this is characterized by the leakage of cerebrospinal fluid with subsequent decrease in intracranial pressure, it is distinguished by a series of manifestations among them the most important intense headache, dull, non-pulsating type, generally of fronto-occipital location, which worsens the first 15 minutes after rising and improves in 15 minutes after change to supine position, the diagnosis is clinical but when it is not clear it can be confirmed with imaging tests,
treatment should be done as soon as possible and divided into conservative and interventional, the choice will depend on the symptoms. This article will summarize pathophysiology, incidence, risk factors, clinical presentation, prevention, diagnosis and treatments.La cefalea post-punción dural (CPPD) es una patología de amplio conocimiento, la cual se produce como principal complicación posterior a realizar un procedimiento de diagnóstico y tratamiento el cual es la punción espinal. Este se caracteriza por la fuga de líquido cefalorraquídeo con posterior disminución de la presión intracraneal. Se distingue por una serie de manifestaciones entre ellas la más importante cefalea intensa, tipo sordo, no pulsante, generalmente de localización fronto-occipital, que empeora los primeros 15 minutos después de levantarse y mejora en 15 minutos después de cambiar a posición decúbito supino. El diagnóstico es clínico, pero cuando no se está seguro se puede confirmar con pruebas de imágenes. El tratamiento debe realizarse lo antes posible y se divide en conservador e intervencionista, cuya elección dependerá de la sintomatología. En este artículo se resumirá la fisiopatología, incidencia, factores de riesgos, presentación clínica, prevención, diagnóstico y tratamientos de esta condición
Tectono-stratigraphic response of the Sandino Forearc Basin (N-Costa Rica and W-Nicaragua) to episodes of rough crust and oblique subduction
The southern Central American active margin is a world-class site where past and
present subduction processes have been extensively studied. Tectonic erosion/accretion
and oblique/orthogonal subduction are thought to alternate in space and time
along the Middle American Trench. These processes may cause various responses
in the upper plate, such as uplift/subsidence, deformation, and volcanic arc migration/
shut-off. We present an updated stratigraphic framework of the Late Cretaceous–
Cenozoic Sandino Forearc Basin (SFB) which provides evidence of
sedimentary response to tectonic events. Since its inception, the basin was predominantly
filled with deep-water volcaniclastic deposits. In contrast, shallow-water
deposits appeared episodically in the basin record and are considered as tectonic
event markers. The SFB stretches for about 300 km and varies in thickness from
5 km (southern part) to about 16 km (northern part). The drastic, along-basin, thickness
variation appears to be the result of (1) differential tectonic evolutions and (2)
differential rates of sediment supply. (1) The northern SFB did not experience major
tectonic events. In contrast, the reduced thickness of the southern SFB (5 km) is the
result of at least four uplift phases related to the collision/accretion of bathymetric
reliefs on the incoming plate: (i) the accretion of a buoyant oceanic plateau (Nicoya
Complex) during the middle Campanian; (ii) the collision of an oceanic plateau (?)
during the late Danian–Selandian; (iii) the collision/accretion of seamounts during
the late Eocene–early Oligocene; (iv) the collision of seamounts and ridges during
the Pliocene–Holocene. (2) The northwestward thickening of the SFB may have
been enhanced by high sediment supply in the Fonseca Gulf area which reflects
sourcing from wide, high relief drainage basins. In contrast, sedimentary input has
possibly been lower along the southern SFB, due to the proximity of the narrow,
lowland isthmus of southern Central America. Moreover, two phases of strongly
oblique subduction affected the margin, producing strike-slip faulting in the forearc
basin: (1) prior to the Farallon Plate breakup, an Oligocene transpressional phase
caused deformation and uplift of the basin depocenter, triggering shallowing-upward
of the Nicaraguan Isthmus in the central and northern SFB; (2) a Pleistocene–Holocene transtensional phase drives the NW-directed motion of a forearc sliver
and reactivation of the graben-bounding faults of the late Neogene Nicaraguan
Depression. We discuss arguments in favour of a Pliocene development of the
Nicaraguan Depression and propose that the Nicaraguan Isthmus, which is the
apparent rift shoulder of the depression, represents a structure inherited from the Oligocene
transpressional phase
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Incidence and seasonality of respiratory viruses among medically attended children with acute respiratory infections in an Ecuador birth cohort, 2011-2014.
BACKGROUND: Ecuador annually has handwashing and respiratory hygiene campaigns and seasonal influenza vaccination to prevent respiratory virus illnesses but has yet to quantify disease burden and determine epidemic timing. METHODS: To identify respiratory virus burden and assess months with epidemic activity, we followed a birth cohort in northwest Ecuador during 2011-2014. Mothers brought children to the study clinic for routine checkups at ages 1, 2, 3, 5, and 8 years or if children experienced any acute respiratory illness symptoms (e.g., cough, fever, or difficulty breathing); clinical care was provided free of charge. Those with medically attended acute respiratory infections (MAARIs) were tested for common respiratory viruses via real-time reverse-transcription polymerase chain reaction (rRT-PCR). RESULTS: In 2011, 2376 children aged 1-4 years (median 35 months) were enrolled in the respiratory cohort and monitored for 7017.5 child-years (cy). The incidence of respiratory syncytial virus (RSV) was 23.9 (95% CI 17.3-30.5), influenza 10.6 (2.4-18.8), adenoviruses 6.7 (4.6-28.0), parainfluenzas 5.0 (2.3-10.5), and rhinoviruses, bocaviruses, human metapneumoviruses, seasonal coronaviruses, and enteroviruses <3/100 cy among children aged 12-23 months and declined with age. Most (75%) influenza detections occurred April-September. CONCLUSION: Cohort children frequently had MAARIs, and while the incidence decreased rapidly among older children, more than one in five children aged 12-23 months tested positive for RSV, and one in 10 tested positive for influenza. Our findings suggest this substantial burden of influenza occurred more commonly during the winter Southern Hemisphere influenza season
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