Publications by authors named "Marcela Natal"
Background: The incidence of anesthesia-induced atelectasis in children is high and closely related to episodes of hypoxemia. The Air-Test is a simple maneuver to detect lung collapse. By a step-reduction in FiO
Article Synopsis
- Exaggerated lung strain and stress can harm the lungs of anesthetized children, particularly when capnoperitoneum (increased abdominal pressure) and lung collapse are involved during laparoscopic surgery.
- In a study with 20 healthy children aged 3 to 7, researchers measured the effects of capnoperitoneum on lung strain and stress, along with assessing individualized protective ventilation techniques.
- Results showed that during capnoperitoneum, lung strain and stress increased significantly; however, applying optimized PEEP helped in recruiting collapsed lungs and returned strain levels to baseline.
Air particle pollution is a current issue that can cause adverse problems to human health and the urban environment. A fraction of these emitted particles is magnetite and iron-rich materials, which may be accumulated by biological indicators and effectively characterized by environmental magnetism methods. Thus, we studied this emitted particle fraction using the epiphytic species Tillandsia capillaris growing in northwestern Argentina's urban, suburban, and rural areas.
View Article and Find Full Text PDFBackground: Continuous positive airway pressure (CPAP) prevents peri-operative atelectasis in adults, but its effect in children has not been quantified.
Objective: The aim of this study was to evaluate the role of CPAP in preventing postinduction and postoperative atelectasis in children under general anaesthesia.
Design: A randomised controlled study.
Particulate air pollution in cities comprises a variety of harmful compounds, including fine iron rich particles, which can persist in the air for long time, increasing the adverse exposure of humans and living things to them. We studied street tree (among other species, Cordyline australis, Fraxinus excelsior and F. pensylvanica) barks as biological collectors of these ubiquitous airborne particles in cities.
View Article and Find Full Text PDFBackground: Pulmonary atelectasis in anesthetized children is easily reverted by lung recruitment maneuvers. However, the high airways pressure reached during the maneuver could negatively affect hemodynamics. The aim of this study is to assess the effect and feasibility of a postural lung recruitment maneuver (P-RM); i.
View Article and Find Full Text PDFBackground: Atelectasis after cardiopulmonary bypass (CPB) can affect right ventricular (RV) performance by increasing its outflow impedance.
Objective: The aim of this study was to determine whether a lung recruitment manoeuvre improves RV function by re-aerating the lung after CPB.
Design: Randomised controlled study.
Objective: For diagnostic tests, the most common graphical representation of the information is the receiver-operating characteristic (ROC) curve. The "agreement chart" displays the information of two observers independently classifying the same n items into the same k categories, and can be used if one considers one of the "observers" as the diagnostic test and the other as the known outcome. This study compares the two charts and their ability to visually portray the various relevant summary statistics that assess how good a diagnostic test may be, such as sensitivity, specificity, predictive values, and likelihood ratios.
View Article and Find Full Text PDFObjective: To determine the utility of biochemical parameters such as lactic acid (LA), C-reactive protein (CRP), microalbuminuria (MAU), and base deficit (BD) as early markers of complications in the immediate postoperative evolution of elective open gastrointestinal surgeries.
Design And Methods: Sixty-two patients subject to elective open gastrointestinal surgery were evaluated during a period of 22 months.
Results: From the initial 62 patients, 2 were excluded, 29 (48.