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Non-Invasive Positive Pressure Ventilation (NIPPV) in the Pregnant Patient: A Case Series

Open Journal of Obstetrics and Gynecology 2020年第11期10卷 1563-1572页

作者： Carlos Montufar-Rueda Agnès Ditisheim Alfredo F. Gei Rolando Pinilla Eddie Dinh Jair Vélez brenda castillo Luis Farias Critical Care Obstetrics Unit Complejo Hospitalario Metropolitano de la Caja de Seguro Social Ciudad de Panamá Panamá Center for Maternal-Fetal Medicine La Tour Hospital Geneva Switzerland Research Division Houston Center for Maternal Fetal Medicine Houston Texas USA

Rationale: Acute respiratory failure is an uncommon complication of pregnancy. However, it is the most frequent organ dysfunction associated with obstetric admissions to an intensive care unit. The obstetric population is a different group due to its physiology and the presence of the fetus that lacks evidence in the literature within the subject of ventilatory support. Noninvasive positive pressure ventilation (NIPPV) is often avoided due to the lack of knowledge on the safety and efficacy of this modality. Currently, there are no guidelines for the management of respiratory failure in pregnancy. Objectives: To provide evidence in support of the use of NIPPV as a safe and reasonable modality for pregnant patients with respiratory failure. Methods: We retrospectively reviewed medical records of 29 pregnant patients of the Obstetric Critical Care Unit of a tertiary hospital in Panamá City who received NIPPV from 2013 to 2015. Failure to response was defined as the lack of increase in the paO2/FiO2 ratio or clinical deterioration 6 hours after initiating NIPPV. Demographics, indication fo

关键词： Respiratory Support during Pregnancy ARDS in Pregnancy ALI in Pregnancy Ventilatory Support Non-Invasive Positive Pressure Ventilation

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Process for the Obtention of Coumaric Acid from Coumarin: Analysis of the Reaction Conditions

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Advances in Chemical Engineering and Science 2013年第3期3卷 195-201页

作者： Néstor N. López-castillo Alma D. Rojas-Rodríguez brenda M. Porta M. Javier Cruz-Gómez Chemical Engineering Department of the Faculty of Chemistry Universidad Nacional Autónoma de México (UNAM) Coyoacan D. F. México México

Coumaric acid can be obtained from basic hydrolysis of coumarin, through a reaction process consisting on opening the lactone ring and cis-trans isomerization. Parameters such as reaction time, temperature, NaOH concentration, solvent and reaction atmosphere, have been thoroughly studied and analyzed, in order to determine the appropriate conditions for the maximum conversion efficiency of coumarin into coumaric acid. Experimental results show that the best conditions are a 1 hour reaction time, at 160℃, with a 20% sodium hydroxide aqueous solution, and in an inert reaction atmosphere.

关键词： Coumarin Coumaric Acid Ester Hydrolysis

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