Browsing by Author "Domínguez De Landa, María Angélica"

Now showing 1 - 5 of 5
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    Corticosteroids use and risk of respiratory coinfections in mechanically ventilated patients with COVID-19
    (2021) Ceballos, María Elena; Núñez Palma, Carolina Verónica; Uribe, Javier; Vera Alarcón, María Magdalena; Castro López, Ricardo; García C., Patricia; Arriata, Gabriel; Gándara, Vicente; Vargas, Camila; Domínguez De Landa, María Angélica; Cerón, Inés; Born, Pablo; Espíndola, Eduardo
    Background: To describe respiratory coinfections, predictive factors and outcomes in patients requiring mechanical ventilation (MV) with COVID-19. Methods: Cohort study, carried out in a Chilean single tertiary Hospital. All patients with COVID-19 admitted to ICU that required MV were included between 1 June and 31 July 2020 Results: 175 patients were admitted to ICU and required MV. Of these, 71 patients developed at least one respiratory coinfection (40.6 %). Early coinfections and late coinfections were diagnosed in 1.7% and 31.4% of all patients admitted to ICU respectively. Within late coinfections, 88% were bacterial, 10% were fungal, and 2% were viral coinfections. One third of isolated bacteria were multidrug-resistant. Multivariate analysis showed that the risk for coinfection was 7.7 times higher for patients with history of corticosteroids (adOR = 7.65, CI 95%: 1.04-56.2, p=0,046) and 2.7 times higher for patients that received dexamethasone during hospitalization (adOR=2.69; CI 95%: 1.14-6.35, p=0,024) than patients that were not exposed. For each additional day in MV, the risk of coinfection increases 1.1 times (adOR=1.06; CI 95%: 1.01-1.11, p=0,025)
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    Enteral Feeding and Necrotizing Enterocolitis: Does Time of First Feeds and Rate of Advancement Matter?
    (LIPPINCOTT WILLIAMS & WILKINS, 2021) Masoli, Daniela; Domínguez De Landa, María Angélica; Tapia, Jose L.; Uauy, Ricardo; Fabres, Jorge; NEOCOSUR Collaborative Network
    The aim of the study was to determine if time to initial enteral feeding (EF) and rate of advancement are associated with necrotizing enterocolitis (NEC) or death. Methods: Secondary analysis of prospectively collected data of very-low-birth-weight infants (VLBWI: 400--1500 g) born in 26 NEOCOSUR centers between 2000 and 2014. Results: Among 12,387 VLBWI, 83.7% survived without NEC, 6.6% developed NEC and survived, and 9.6% had NEC and died or died without NEC (NEC/death). After risk adjustment, time to initial EF (median = 2 days) was not associated with NEC; however, delaying it was protective for NEC/death (odds ratio [OR] = 0.96; 95% confidence interval [CI] 0.93--0.99). A slower feeding advancement rate (FAR) was protective for NEC (OR = 0.97; 95% CI = 0.94-0.98) and for NEC/death (OR = 0.98; 95% CI = 0.96-0.99). Conclusions: In VLBWI, there was no association between an early initial EF and NEC, although delaying it was associated with less NEC/death. A slower FAR was associated with lower risk of both outcomes.
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    Factors associated with Periventricular Leukomalacia in very low birth weight infants. A multicenter study in the NEOCOSUR Network
    (2025) Castillo Sotomayor, María Victoria; Toso, Alberto; Domínguez De Landa, María Angélica; Sandino, Daniela; Vaz Ferreira, Catalina; Herrera, Tamara; Fontana, Yanin; Baltra, Estebani; Rado, Sandra; Genes, Larissa; Tapia, José L.
    La prevalencia global de la Leucomalacia Periventricular (LPV) se ha mantenido estable, en torno al 4%, en recién nacidos de muy bajo peso al nacer (RNMBPN) en la Red Neonatal NEOCOSUR durante 16 años. Objetivo: Determinar los factores asociados a la presencia de LPV en aquellos RNMBPN sobrevivientes al alta, su incidencia global y por edad gestacional (EG). Pacientes y Método: Estudio observacional, multicéntrico, retrospectivo con datos registrados prospectivamente (período 2012- 2021). Se incluyeron aquellos con peso de nacimiento entre 400 a 1.500 gramos y 23 a 31+6 semanas de EG sobrevivientes al alta. Se realizó un análisis bivariado utilizando la prueba chi-cuadrado de Pearson para contrastar el porcentaje de LPV para variables categóricas y t-Student para contrastar promedios para variables numéricas. Para explorar el efecto independiente de cada variable explicativa se realizó un análisis de regresión logística multivariado. Resultados: En 6825 RNMBPN sobrevivientes, la incidencia global de LPV fue del 8,5%. Los factores asociados a mayor probabilidad de LPV fueron displasia broncopulmonar (DBP) [OR 2,27 IC 95% 1,80-2,87], enterocolitis necrotizante (ECN) [OR 1,78 IC 95% 1,35-2,34], sepsis tardía [OR 1,71 IC 95% 1,34-2,19], hemorragia intracraneana (HIC) severa [OR 4,64 IC 95% 3,51-6,14], Ductus Arterioso (DAP) [OR 1,32 IC 95% 1,06-1,64] y ventilación mecánica (VM) [OR 2,03 IC 95% 1,54-2,67]. Conclusión: En RNMBPN sobrevivientes al alta, una mayor probabilidad de LPV se asoció a la presencia de DBP, ECN, sepsis tardía, HIC severa y DAP; y al empleo de VM
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    Interim report: Safety and immunogenicity of an inactivated vaccine against SARS-CoV-2 in healthy chilean adults in a phase 3 clinical trial
    (2021) Bueno Ramírez, Susan; Abarca Villaseca, Katia; González Adonis, Pablo Andrés; Gálvez Arriagada, Nicolás Marcelo Salvador; Soto Ramírez, Jorge Andrés; Duarte Peñaloza, Luisa Fernanda; Schultz Lombardic, Bárbara M.; Pacheco, Gaspar A.; González Carreño, Liliana Andrea; Vázquez, Yaneisi; Ríos Raggio, Mariana; Melo González, Felipe; Rivera Pérez, Daniela; Iturriaga, Carolina; Urzúa Acevedo, Marcela del Pilar; Domínguez De Landa, María Angélica; Andrade Parra, Catalina Andrea; Berríos Rojas, Roslye; Canedo Marroquín, Giselda; Covián, Camila
    The ongoing COVID-19 pandemic has had a significant impact worldwide, with an incommensurable social and economic burden. The rapid development of safe and protective vaccines against this disease is a global priority. CoronaVac is a vaccine prototype based on inactivated SARS-CoV-2, which has shown promising safety and immunogenicity profiles in pre-clinical studies and phase 1/2 trials in China. To this day, four phase 3 clinical trials are ongoing with CoronaVac in Brazil, Indonesia, Turkey, and Chile. This article reports the safety and immunogenicity results obtained in a subgroup of participants aged 18 years and older enrolled in the phase 3 Clinical Trial held in Chile.
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    Secondary respiratory early and late infections in mechanically ventilated patients with COVID-19
    (2022) Ceballos, María Elena; Nuñez, Ingrid; Uribe, Javier; Vera Alarcón, María Magdalena; Castro López, Ricardo; García C., Patricia; Arriata, Gabriel; Gándara, Vicente; Vargas Muñoz, Camila; Domínguez De Landa, María Angélica; Cerón, Inés; Born, Pablo; Espíndola, Eduardo
    Background: Patients with COVID-19 receiving mechanical ventilation may become aggravated with a secondary respiratory infection. The aim of this study was to describe secondary respiratory infections, their predictive factors, and outcomes in patients with COVID-19 requiring mechanical ventilation. Methods: A cohort study was carried out in a single tertiary hospital in Santiago, Chile, from 1st June to 31st July 2020. All patients with COVID-19 admitted to the intensive care unit that required mechanical ventilation were included. Results: A total of 175 patients were enrolled, of which 71 (40.6%) developed at least one secondary respiratory infection during follow-up. Early and late secondary infections were diagnosed in 1.7% and 31.4% respectively. Within late secondary infections, 88% were bacterial, 10% were fungal, and 2% were of viral origin. One-third of isolated bacteria were multidrug-resistant. Bivariate analysis showed that the history of corticosteroids used before admission and the use of dexamethasone during hospitalization were associated with a higher risk of secondary infections (p = 0.041 and p = 0.019 respectively). Multivariate analysis showed that for each additional day of mechanical ventilation, the risk of secondary infection increases 1.1 times (adOR = 1.07; 95% CI 1.02–1.13, p = 0.008) Conclusions: Patients with COVID-19 admitted to the intensive care unit and requiring mechanical ventilation had a high rate of secondary infections during their hospital stay. The number of days on MV was a risk factor for acquiring secondary respiratory infections.