Os diques na encosta ocidental da Serra de Ybytyruzú, região centro‑oriental do Paraguai

The Cordillera del Ybytyruzú region of central‑eastern Paraguay is predominantly formed by tholeiitic lava flows from the Early Cretaceous age (130–134 Ma) cut by K‑alkaline dykes and intrusive bodies aged between 125 and 127 Ma. Petrochemical studies focusing on 14 samples of dykes from the region show an apparent affinity to Roman Province Type rocks and total consistency with the overall petrographic association of the Asunción‑Sapucai‑Villarrica (ASV) graben. Two main potassic suites are distinguished: B‑P (basanite‑tephrite‑phonotephrite‑phonolite) and AB‑T (alkali basalt‑trachybasalt‑trachyandesite‑trachyphonolite/trachyte).The occurrence of lamproitic rocks in the area has so far not been confirmed.A Cordilheira do Ybytytyruzú na região centro‑oriental do Paraguai é formada dominantemente de derrames de lavas toleíticas de idade Cretáceo Inferior (130–134 Ma) cortados por diques alcalinos potássicos e corpos intrusivos com idades entre 125 e 127 Ma. Estudos petroquímicos focalizando 14 amostras de diques da região mostram uma aparente afinidade com as rochas da Província do Tipo Romano e total consistência com a associação petrográfica global do gráben Assunção‑Sapucai‑Villarrica (ASV). Duas suítes potássicas principais são distinguidas: B‑P (basanito‑tefrito‑fonotefrito‑fonolito) e AB‑T (álcali basalto‑traquibasalto‑traquiandesito‑traquifonolito/traquito). A ocorrência de rochas lamproíticas na área não foi até então confirmada

Os diques na encosta ocidental da Serra de Ybytyruzú, região centro‑oriental do Paraguai

The Cordillera del Ybytyruzú region of central eastern Paraguay is predominantly formed by tholeiitic lava flows from the Early Cretaceous age (130–134 Ma) cut by K alkaline dykes and intrusive bodies aged between 125 and 127 Ma. Petrochemical studies focusing on 14 samples of dykes from the region show an apparent affinity to Roman Province Type rocks and total consistency with the overall petrographic association of the Asunción Sapucai Villarrica (ASV) graben. Two main potassic suites are distinguished: B P (basanite tephrite phonotephrite phonolite) and AB T (alkali basalt trachybasalt trachyandesite trachyphonolite/trachyte).The occurrence of lamproitic rocks in the area has so far not been confirmed

Goodbye Hartmann trial: a prospective, international, multicenter, observational study on the current use of a surgical procedure developed a century ago

Background: Literature suggests colonic resection and primary anastomosis (RPA) instead of Hartmann's procedure (HP) for the treatment of left-sided colonic emergencies. We aim to evaluate the surgical options globally used to treat patients with acute left-sided colonic emergencies and the factors that leading to the choice of treatment, comparing HP and RPA. Methods: This is a prospective, international, multicenter, observational study registered on ClinicalTrials.gov. A total 1215 patients with left-sided colonic emergencies who required surgery were included from 204 centers during the period of March 1, 2020, to May 31, 2020. with a 1-year follow-up. Results: 564 patients (43.1%) were females. The mean age was 65.9 ± 15.6 years. HP was performed in 697 (57.3%) patients and RPA in 384 (31.6%) cases. Complicated acute diverticulitis was the most common cause of left-sided colonic emergencies (40.2%), followed by colorectal malignancy (36.6%). Severe complications (Clavien-Dindo ≥ 3b) were higher in the HP group (P < 0.001). 30-day mortality was higher in HP patients (13.7%), especially in case of bowel perforation and diffused peritonitis. 1-year follow-up showed no differences on ostomy reversal rate between HP and RPA. (P = 0.127). A backward likelihood logistic regression model showed that RPA was preferred in younger patients, having low ASA score (≤ 3), in case of large bowel obstruction, absence of colonic ischemia, longer time from admission to surgery, operating early at the day working hours, by a surgeon who performed more than 50 colorectal resections. Conclusions: After 100 years since the first Hartmann's procedure, HP remains the most common treatment for left-sided colorectal emergencies. Treatment's choice depends on patient characteristics, the time of surgery and the experience of the surgeon. RPA should be considered as the gold standard for surgery, with HP being an exception

Not available.

O Paraguai Oriental está localizado numa área que geologicamente representa a borda oeste da Bacia do Paraná. Os sedimentos e a estratigrafia são muito similares aos do lado brasileiro da bacia, principalmente os da região sul do Paraguai Oriental. Tal como ocorre com o lado brasileiro, a área pesquisada experimentou a sua individualização, como bacia. a partir do Pré-Cambriano Superior ao Eopaleozóico, intervalo representado pelo Grupo Itapucumi, da Região Norte, de provável idade cambriana. A seguir, depositaram-se os sedimentos dos grupos Caacupé e Itacurubi, que representam uma exceção dentro da bacia do Paraná, pois não são encontrados depósitos correlacionáveis no lado brasileiro. Estragraficamente, seguem-se-lhes os sedimentos que constituem o Grupo Cerro Cora e as formações San Miguel e Independênca. As condições desérticas afetaram também a área estudada, imprimindo as suas características quando da deposição da Foemação Misiones. O magmatismo wealdeniano, qua afetou a Bacia do Paraná, está representado no Paraguai Oriental pela Formação Alto Paraná. Constata-se, pelo acima mencionado, que existem muitas semelhanças geológicas entre a área estudada (Paraguai Oriental) e o lado brasileiro daBAcia do Paraná. Porém, talvez o fato de situar-se na borda da bacia propiciou uma maior intensidade tectônica, exemplificada pelas sucessivas reativações do Arco Central Paragauio, qua bordeja o lado oeste da região e foi o responsável pela diferença geológica observada entre as regiões Norte e Sul da área estudada.Eastern Paraguay is situated in an area which, in geological terms, represents the western border of the Paraná Basin. The sediments and stratigraphy are very similar to those from the Brazilian side of the basin, principally those from the Southern region of Eastern Paraguay. Similarly to the Brazilian side the investigated area underwent individualization as basin from the Upper Precambrian to the Eopalaeozoic, on an interval represented by the Itapucumi Group of the Northern Region, probably of Cambrian age. Following this, the sediments of the Caacupé and Itacurubi group were deposited, which represent an exception in the Paraná Basin, as no correlationable deposits are found on the Brazilian side. They are followed in the stratigraphy by the sediments which compose the Cerro Corá Group and the San Miguel and Independencia formations. Desert conditions also affected the investigated region, imprinting their characteristics during the deposition of the Misiones Formation. The wealdenian magmatism, which affected the Paraná Basin in Eastern Paraguay is represented by the Alto Paraná Formation. It can be established from the above mentioned that there are many geological similarities between the investigated region (Eastern Paraguay) and the Brazilian side of the Paraná Basin. However, perhaps due to its position at the margin of the basin, it was submitted to a large amount of tectonic activity, exemplified by the successive reactivations of the Central Paraguaian Arch, which borders the western side of the region and was responsible for the geological difference observed between the North and South regions of the investigated area

Not available.

O Paraguai Oriental está localizado numa área que geologicamente representa a borda oeste da Bacia do Paraná. Os sedimentos e a estratigrafia são muito similares aos do lado brasileiro da bacia, principalmente os da região sul do Paraguai Oriental. Tal como ocorre com o lado brasileiro, a área pesquisada experimentou a sua individualização, como bacia. a partir do Pré-Cambriano Superior ao Eopaleozóico, intervalo representado pelo Grupo Itapucumi, da Região Norte, de provável idade cambriana. A seguir, depositaram-se os sedimentos dos grupos Caacupé e Itacurubi, que representam uma exceção dentro da bacia do Paraná, pois não são encontrados depósitos correlacionáveis no lado brasileiro. Estragraficamente, seguem-se-lhes os sedimentos que constituem o Grupo Cerro Cora e as formações San Miguel e Independênca. As condições desérticas afetaram também a área estudada, imprimindo as suas características quando da deposição da Foemação Misiones. O magmatismo wealdeniano, qua afetou a Bacia do Paraná, está representado no Paraguai Oriental pela Formação Alto Paraná. Constata-se, pelo acima mencionado, que existem muitas semelhanças geológicas entre a área estudada (Paraguai Oriental) e o lado brasileiro daBAcia do Paraná. Porém, talvez o fato de situar-se na borda da bacia propiciou uma maior intensidade tectônica, exemplificada pelas sucessivas reativações do Arco Central Paragauio, qua bordeja o lado oeste da região e foi o responsável pela diferença geológica observada entre as regiões Norte e Sul da área estudada.Eastern Paraguay is situated in an area which, in geological terms, represents the western border of the Paraná Basin. The sediments and stratigraphy are very similar to those from the Brazilian side of the basin, principally those from the Southern region of Eastern Paraguay. Similarly to the Brazilian side the investigated area underwent individualization as basin from the Upper Precambrian to the Eopalaeozoic, on an interval represented by the Itapucumi Group of the Northern Region, probably of Cambrian age. Following this, the sediments of the Caacupé and Itacurubi group were deposited, which represent an exception in the Paraná Basin, as no correlationable deposits are found on the Brazilian side. They are followed in the stratigraphy by the sediments which compose the Cerro Corá Group and the San Miguel and Independencia formations. Desert conditions also affected the investigated region, imprinting their characteristics during the deposition of the Misiones Formation. The wealdenian magmatism, which affected the Paraná Basin in Eastern Paraguay is represented by the Alto Paraná Formation. It can be established from the above mentioned that there are many geological similarities between the investigated region (Eastern Paraguay) and the Brazilian side of the Paraná Basin. However, perhaps due to its position at the margin of the basin, it was submitted to a large amount of tectonic activity, exemplified by the successive reactivations of the Central Paraguaian Arch, which borders the western side of the region and was responsible for the geological difference observed between the North and South regions of the investigated area