Examinando por Autor "Díaz, Franco"

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    Capnometry after an inspiratory breath hold, PLATCO2, as a surrogate for PaCO2 in mild to moderate Pediatric Acute Respiratory Distress Syndrome: A feasibility study
    (Wiley Periodicals, 2023-07-10) Cruces, Pablo; Moreno, Diego; Reveco, Sonia; Améstica, Marjorie; Araneda, Patricio; Ramirez, Yennys; Vásquez-Hoyos, Pablo; Díaz, Franco
    Objective: Accurate and reliable noninvasive methods to estimate gas exchange are necessary to guide clinical decisions to avoid frequent blood samples in children with pediatric acute respiratory distress syndrome (PARDS). We aimed to investigate the correlation and agreement between end‐tidal PCO2 measured immediately after a 3‐s inspiratory‐hold (PLATCO2) by capnometry and PaCO2 measured by arterial blood gases (ABG) in PARDS. Measurements and Main Results: All patients were in volume‐controlled ventilation mode. The regular end‐tidal P P CO ETCO ( ) 2 2 (without the inspiratory hold) was registered immediately after the ABG sample. An inspiratory‐hold of 3 s was performed for lung mechanics measurements, recording PETCO2 in the breath following the inspiratory‐hold. (PLATCO2). End‐tidal alveolar dead space fraction (AVDSf) was calculated as [( – )/ PP P aCO ETCO aCO ] 2 2 2 and its surrogate (S)AVDSf as [( CO – )/ CO PLAT 2 ETCO PLAT 2 P ] 2 . Measurements of PaCO2 were considered the gold standard. We performed concordance correlation coefficient (ρc), Spearman's correlation (rho), and Bland–Altmann's analysis (mean difference ± SD [limits of agreement, LoA]). Eleven patients were included, with a median (interquartile range) age of 5 (2–11) months. Tidal volume was 5.8 (5.7–6.3) mL/kg, PEEP 8 (6–8), driving pressure 10 (8–11), and plateau pressure 17 (17–19) cm H2O. Forty‐one paired measurements were analyzed. PaCO2 was higher than PETCO2 (52 mmHg [48–54] vs. 42 mmHg [38–45], p < 0.01), and there were no significant differences with PLATCO2 (50 mmHg [46–55], p > 0.99). The concordance correlation coefficient and Spearman's correlation between PaCO2 and PLATCO2 were robust (ρc = 0.80 [95% confidence interval [CI]: 0.67–0.90]; and rho = 0.80, p < 0.001.), and for PETCO2 were weak and strong (ρc = 0.27 [95% CI: 0.15–0.38]; and rho = 0.63, p < 0.01). The bias between PLATCO2 and PaCO2 was −0.4 ± 3.5 mmHg (LoA −7.2 to 6.4), and between PETCO2 and PaCO2 was −8.5 ± 4.1 mmHg (LoA −16.6 to −0.5). The correlation between AVDSf and (S)AVDSf was moderate (rho = 0.55, p < 0.01), and the mean difference was −0.5 ± 5.6% (LoA −11.5 to 10.5) Conclusion: This pilot study showed the feasibility of measuring end‐tidal CO2 after a 3‐s end‐inspiratory breath hole in pediatric patients undergoing controlled ventilation for ARDS. Encouraging preliminary results warrant further study of this technique.
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    Challenges of implementing the Paediatric Surviving Sepsis Campaign International Guidelines 2020 in resource-limited settings: A real-world view beyond the academia
    (Sociedad Chilena de Pediatria, 2021) Wooldridge, Gavin; O’Brien, Nicole; Muttalib, Fiona; Abbas, Qalab; Adabie Appiah, John; Baker, Tim; Bansal, Arun; Basnet, Sangita; Campos-Miño, Santiago; Carla de Souza, Daniela; Díaz, Franco; Dramowski, Angela; Fernández-Sarmiento, Jaime; Fustiñana, Ana; González, Gustavo; Jabornisky, Roberto; Jaramillo-Bustamante, Juan Camilo; Chor Yek Kee Yek Kee; Lang, Hans-Joerg; Soares Lanziott, Vanessa; Kohn Loncarica, Guillermo; Mohsenibod, Hadi; Ode, Bunmi; Murthy, Srinivas; Amelie von Saint Andre-von Arnim; Hansmann, Andreas; González-Dambrauskas, Sebastián
    The Surviving Sepsis Campaign International Guidelines for the Management of Septic Shock and Sepsis-associated Organ Dysfunction in Children was released in 2020 and is intended for use in all global settings that care for children with sepsis. However, practitioners managing children with sep- sis in resource-limited settings (RLS) face several challenges and disease patterns not experienced by those in resource-rich settings. Based upon our collective experience from RLS, we aimed to reflect on the difficulties of implementing the international guidelines. We believe there is an urgent need for more evidence from RLS on feasible, efficacious approaches to the management of sepsis and septic shock that could be included in future context-specific guidelines.
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    Clinical and organizational framework of repurposing pediatric intensive care unit to adult critical care in a resource-limited setting: Lessons from the response of an urban general hospital to the COVID-19 pandemic
    (Elsevier, 2022) Díaz, Franco; Kehr, Juan; Cores, Camila; Rubilar, Patricia; Medina, Tania; Vargas, Caroline; Cruces, Pablo
    Purpose We aim to describe the action plan and clinical results of a COVID-19 unit for adult patient care in units intended for critically ill children, proposing a clinical/administrative framework. Methods We reviewed the preparedness of the PICU team before the surge of cases of COVID-19 and the organizational/administrative issues to increase critical beds in a six-bed PICU allocated to adult critical care in a government-funded general hospital in Latin America. We analyzed the prospectively collected administrative/clinical data of severe COVID-19 cases admitted to PICU during the peak of the first wave of the pandemic. Results We describe a 6-step preparedness plan: recruitment and education, admission criteria, children diversion, team hierarchy, and general and respiratory equipment. The 6-bed PICU was allocated to adult care for 20 weeks, progressively increasing capacity to a 23-bed dedicated COVID-19 unit managed by the PICU team. A six-block bed organizational units were implemented, and personnel increased from 40 to 125 healthcare workers in 24 h shifts. COVID-19 incidence in personnel was 0.5/1000 workdays. One hundred thirty-six patients were admitted, median age 59 (51,65) years old, 68% were male, and 63% had P/F ≤ 100. In addition, 48% received mechanical ventilation, the median length of stay was 7 (3,17), and in-hospital mortality was 15%. Conclusions We propose an organizational framework for the role of PICU in the hospital action plan to increase adult critical beds. The cohort of patients admitted to a PICU repurposed as a COVID-19 ICU had good outcomes. These data are valuable to plan coordinated actions of the healthcare system for future scenarios.
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    Comparison of Interleukin-6 plasma concentration in multisystem inflammatory syndrome in children (MIS-C) associated with SARS-CoV-2 and pediatric sepsis
    (Frontiers Media S.A., 2021-11-15) Díaz, Franco; Busto B., Raúl; Yagnam, Felipe; J. Karsies, Todd; Vásquez-Hoyos, Pablo; Jaramillo-Bustamante, Juan-Camilo; Gonzalez-Dambrauskas, Sebastián; Drago, Michelle; Cruces, Pablo
    Importance: Multisystem Inflammatory Syndrome in Children (MIS-C) associated with SARS-CoV-2 infection is thought to be driven by a post-viral dysregulated immune response, where interleukin 6 (IL-6) might have a central role. In this setting, IL-6 inhibitors are prescribed as immunomodulation in cases refractory to standard therapy. Objective: To compare plasma IL-6 concentration between critically ill children with MIS-C and sepsis. Design: A retrospective cohort study from previously collected data. Setting: Individual patient data were gathered from three different international datasets. Participants: Critically ill children between 1 month-old and 18 years old, with an IL-6 level measured within 48 h of admission to intensive care. Septic patients were diagnosed according to Surviving Sepsis Campaign definition and MIS-C cases by CDC criteria. We excluded children with immunodeficiency or immunosuppressive therapy. Exposure: None. Main Outcome(s) and Measure(s): The primary outcome was IL-6 plasma concentration in MIS-C and sepsis group at admission to the intensive care unit. We described demographics, inflammatory biomarkers, and clinical outcomes for both groups. A subgroup analysis for shock in each group was done. Results: We analyzed 66 patients with MIS-C and 44 patients with sepsis. MIS-C cases were older [96 (48, 144) vs. 20 (5, 132) months old, p < 0.01], but no differences in sex (41 vs. 43% female, p = 0.8) compared to septic group. Mechanical ventilation use was 48.5 vs. 93% (p < 0.001), vasoactive drug use 79 vs. 66% (p = 0.13), and mortality 4.6 vs. 34.1% (p < 0.01) in MIS-C group compared to sepsis. IL-6 was 156 (36, 579) ng/dl in MIS-C and 1,432 (122, 6,886) ng/dl in sepsis (p < 0.01), while no significant differences were observed in procalcitonin (PCT) and c-reactive protein (CRP). 52/66 (78.8%) patients had shock in MIS-C group, and 29/44 (65.9%) had septic shock in sepsis group. Septic shock had a significantly higher plasma IL-6 concentration than the three other sub-groups. Differences in IL-6, CRP, and PCT were not statistically different between MIS-C with and without shock. Conclusions and Relevance: IL-6 plasma concentration was elevated in critically ill MIS-C patients but at levels much lower than those of sepsis. Furthermore, IL-6 levels don’t discriminate between MIS-C cases with and without shock. These results lead us to question the role of IL-6 in the pathobiology of MIS-C, its diagnosis, clinical outcomes, and, more importantly, the off-label use of IL-6 inhibitors for these cases.
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    Concurrencia de encefalitis diseminada aguda en lactante con síndrome inflamatorio multisistémico asociado a infección por SARS-CoV-2
    (Sociedad Chilena de Pediatría, 2021) Ampuero Acuña, Camila; Díaz, Franco; Donoso, Alejandro
    La presente comunicación permite destacar que en el curso de MIS-C puede existir una grave complicación como ADEM. Aunque en un inicio el tratamiento inmunomodulador con altas dosis de metilprednisolona y IGIV no varía de forma significativa, es de importancia una precoz intervención pues un tratamiento oportuno tiene resultados clínicos favorables, además de ser relevante el disponer de este antecedente para un adecuado seguimiento. Finalmente, en el niño con MIS-C y encefalopatía con déficit neurológico se debe considerar la eventual existencia de ADEM, entre las posibles complicaciones del sistema nervioso central.
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    Factores asociados a ventilación mecánica prolongada en niños con fallo respiratorio de causa pulmonar: estudio de cohortes del registro de LARed Network
    (Elsevier, 2023-06-15) Barajas-Romero, Juan Sebastían; Vásquez-Hoyos, Pablo; Pardo, Rosalba; Jaramillo-Bustamante, Juan Camilo; Grigolli, Regina; Monteverde-Fernández, Nicolas; Gonzalez-Dambrauskas, Sebastián; Jabornisky, Roberto; Cruces, Pablo; Wegner, Adriana; Díaz, Franco; Pietroboni, Pietro
    Objectives: To identify factors associated with prolonged mechanical ventilation (pMV) in pediatric patients in pediatric intensive care units (PICUs). Design: Secondary analysis of a prospective cohort. Setting: PICUs in centers that are part of the LARed Network between April 2017 and January 2022. Participants: Pediatric patients on mechanical ventilation (IMV) due to respiratory causes. We defined IMV time greater than the 75th percentile of the global cohort. Main variables of interest: Demographic data, diagnoses, severity scores, therapies, complications, length of stay, morbidity, and mortality. Results: 1698 children with MV of 8±7 days were included, and pIMV was defined as 9 days. Factors related to admission were age under 6 months (OR 1.61, 95% CI 1.17-2.22), bronchopulmonary dysplasia (OR 3.71, 95% CI 1.87-7.36), and fungal infections (OR 6.66, 95% CI 1.87-23.74), while patients with asthma had a lower risk of pIMV (OR 0.30, 95% CI 0.12-0.78). Regarding evolution and length of stay in the PICU, it was related to ventilation-associated pneumonia (OR 4.27, 95% CI 1.79-10.20), need for tracheostomy (OR 2.91, 95% CI 1.89-4.48), transfusions (OR 2.94, 95% CI 2.18-3.96), neuromuscular blockade (OR 2.08, 95% CI 1.48-2.93), high-frequency ventilation (OR 2.91, 95% CI 1.89-4.48), and longer PICU stay (OR 1.13, 95% CI 1.10-1.16). In addition, mean airway pressure greater than 13cmH2O was associated with pIMV (OR 1.57, 95% CI 1.12-2.21). Conclusions: Factors related to IMV duration greater than 9 days in pediatric patients in PICUs were identified in terms of admission, evolution, and length of stay
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    Immunoglobulin, glucocorticoid, or combination therapy for multisystem inflammatory syndrome in children: a propensity-weighted cohort study
    (Elsevier, 2023-02-14) Channon-Wells, Samuel; Vito, Ortensia; McArdle, Andrew J.; Díaz, Franco
    Background: Multisystem inflammatory syndrome in children (MIS-C), a hyperinflammatory condition associated with SARS-CoV-2 infection, has emerged as a serious illness in children worldwide. Immunoglobulin or glucocorticoids, or both, are currently recommended treatments. Methods: The Best Available Treatment Study evaluated immunomodulatory treatments for MIS-C in an international observational cohort. Analysis of the first 614 patients was previously reported. In this propensity-weighted cohort study, clinical and outcome data from children with suspected or proven MIS-C were collected onto a web-based Research Electronic Data Capture database. After excluding neonates and incomplete or duplicate records, inverse probability weighting was used to compare primary treatments with intravenous immunoglobulin, intravenous immunoglobulin plus glucocorticoids, or glucocorticoids alone, using intravenous immunoglobulin as the reference treatment. Primary outcomes were a composite of inotropic or ventilator support from the second day after treatment initiation, or death, and time to improvement on an ordinal clinical severity scale. Secondary outcomes included treatment escalation, clinical deterioration, fever, and coronary artery aneurysm occurrence and resolution. This study is registered with the ISRCTN registry, ISRCTN69546370. Findings: We enrolled 2101 children (aged 0 months to 19 years) with clinically diagnosed MIS-C from 39 countries between June 14, 2020, and April 25, 2022, and, following exclusions, 2009 patients were included for analysis (median age 8·0 years [IQR 4·2–11·4], 1191 [59·3%] male and 818 [40·7%] female, and 825 [41·1%] White). 680 (33·8%) patients received primary treatment with intravenous immunoglobulin, 698 (34·7%) with intravenous immunoglobulin plus glucocorticoids, 487 (24·2%) with glucocorticoids alone; 59 (2·9%) patients received other combinations, including biologicals, and 85 (4·2%) patients received no immunomodulators. There were no significant differences between treatments for primary outcomes for the 1586 patients with complete baseline and outcome data that were considered for primary analysis. Adjusted odds ratios for ventilation, inotropic support, or death were 1·09 (95% CI 0·75–1·58; corrected p value=1·00) for intravenous immunoglobulin plus glucocorticoids and 0·93 (0·58–1·47; corrected p value=1·00) for glucocorticoids alone, versus intravenous immunoglobulin alone. Adjusted average hazard ratios for time to improvement were 1·04 (95% CI 0·91–1·20; corrected p value=1·00) for intravenous immunoglobulin plus glucocorticoids, and 0·84 (0·70–1·00; corrected p value=0·22) for glucocorticoids alone, versus intravenous immunoglobulin alone. Treatment escalation was less frequent for intravenous immunoglobulin plus glucocorticoids (OR 0·15 [95% CI 0·11–0·20]; p<0·0001) and glucocorticoids alone (0·68 [0·50–0·93]; p=0·014) versus intravenous immunoglobulin alone. Persistent fever (from day 2 onward) was less common with intravenous immunoglobulin plus glucocorticoids compared with either intravenous immunoglobulin alone (OR 0·50 [95% CI 0·38–0·67]; p<0·0001) or glucocorticoids alone (0·63 [0·45–0·88]; p=0·0058). Coronary artery aneurysm occurrence and resolution did not differ significantly between treatment groups. Interpretation Recovery rates, including occurrence and resolution of coronary artery aneurysms, were similar for primary treatment with intravenous immunoglobulin when compared to glucocorticoids or intravenous immunoglobulin plus glucocorticoids. Initial treatment with glucocorticoids appears to be a safe alternative to immunoglobulin or combined therapy, and might be advantageous in view of the cost and limited availability of intravenous immunoglobulin in many countries.
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    Infancia y COVID-19: Los efectos indirectos de la pandemia COVID-19 en el bienestar de niños, niñas y adolescentes
    (Sociedad Chilena de Pediatría, 2022) Díaz, Franco; Donoso Fuentes, Alejandro
    El impacto de la pandemia COVID-19 ha sido invisibilizado en niños, niñas y adolescentes, ya que muchos de los efectos negativos han sido producto de las medidas de contención y mitigación, y sólo serán cuantificables a mediano y largo plazo. Aunque la respuesta mundial ha sido exitosa en disminuir la letalidad de la enfermedad, el efecto nocivo en poblaciones vulnerables, como niños, niñas y adolescentes es de alto impacto, catalogado como catastrófico por organismos internacionales. La pandemia ha afectado profundamente la salud física y mental de este grupo etario, y sus efectos ne gativos silenciosos se extienden a diferentes ámbitos como la escolaridad, economía familiar, trabajo infantil y seguridad alimentaria. El tercer año de la pandemia es una oportunidad para incorporar el bienestar multidimensional de los niños, niñas y adolescentes como piedra angular de la respuesta de la sociedad a una crisis global, sea esta de salud, económica o política.
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    La extubación durante la noche no se asocia con su fracaso en pacientes pediátricos de Unidad de Cuidados Intensivos: Estudio de cohorte retrospectivo
    (Sociedad Chilena de Pediatría, 2023-04-17) Ibarra V., Maybreet; Andrades E., Francisca; Satta S., María; Díaz, Franco; Donoso F., Alejandro
    Poco es conocido sobre la hora del día y carácter de éste (hábil/no hábil) en que se efectúa la extubación, y si durante la noche esta es segura. Objetivo: describir la frecuencia de extubación nocturna (EN) y en día no hábil (ENH). Adicionalmente determinar la asociación entre éstas y resultados clínicos. Pacientes y Método: Estudio de cohorte retrospectivo de pacientes menores de 18 años quienes recibieron ventilación mecánica (VM) invasiva y se efectuó un intento extubación en una Unidad de Paciente Crítico Pediátrico (UPCP) médico quirúrgica de alta complejidad entre el 01/01/2018 al 31/12/2021. Exposición primaria: EN, la cual fue definida como la realizada entre 20:01 - 8:00 horas. Se evaluó su asociación con fracaso de extubación (FE), duración de VM invasiva y tiempo de esta- día en la UPCP. Resultados: 146 pacientes fueron incluidos (58,9% hombres, edad 1,14 (0,25 - 5,5) años). En el 17,8% se efectuó EN. La extubación nocturna no se asoció con FE como tampoco el día de extubación. El FE fue 3,8% en EN y 5% en la extubación diurna (ED) (p = 0,80). La duración de la VM invasiva fue menor en EN que ED (48 (24-73,5) vs. 72 (48-96) h, p = 0,02). Conclusiones: La EN no se asoció con FE. Los pacientes con EN tuvieron menor duración de VM invasiva, y ésta última se asoció con FE. La retirada de la VM invasiva debe ser considerada en la primera oportunidad y estar determinada por factores clínicos, más que por la hora del día.
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    Latin American Consensus on the Management of Sepsis in Children: Sociedad Latinoamericana de Cuidados Intensivos Pediátricos [Latin American Pediatric Intensive Care Society] (SLACIP) Task Force: Executive Summary
    (SAGE Publications, 2022) Fernández-Sarmiento, Jaime; De Souza, Daniela Carla; Martinez, Anacaona; Nieto, Victor; López-Herce, Jesús; Soares Lanziotti, Vanessa; Arias López, María del Pilar; Brunow De Carvalho, Werther; Oliveira, Claudio F.; Jaramillo-Bustamante, Juan Camilo; Díaz, Franco; Yock-Corrales, Adriana; Ruvinsky, Silvina; Munaico, Manuel; Pavlicich, Viviana; Iramain, Ricardo; Márquez, Marta Patricia; González, Gustavo; Yunge, Mauricio; Tonial, Cristian; Cruces, Pablo; Palacio, Gladys; Grela, Carolina; Slöcker- Barrio, Maria; Campos-Miño, Santiago; González- Dambrauskas, Sebastian; Sánchez-Pinto, Nelson L.; Celiny García, Pedro; Jabornisky, Roberto
    Objective: The aim of this study was to develop evidence-based recommendations for the diagnosis and treatment of sepsis in children in low- and middle-income countries (LMICs), more specifically in Latin America. Design: A panel was formed consisting of 27 experts with experience in the treatment of pediatric sepsis and two methodologists working in Latin American countries. The experts were organized into 10 nominal groups, each coordinated by a member. Methods: A formal consensus was formed based on the modified Delphi method, combining the opinions of nominal groups of experts with the interpretation of available scientific evidence, in a systematic process of consolidating a body of recommendations. The systematic search was performed by a specialized librarian and included specific algorithms for the Cochrane Specialized Register, PubMed, Lilacs, and Scopus, as well as for OpenGrey databases for grey literature. The GRADEpro GDT guide was used to classify each of the selected articles. Special emphasis was placed on search engines that included original research conducted in LMICs. Studies in English, Spanish, and Portuguese were covered. Through virtual meetings held between February 2020 and February 2021, the entire group of experts reviewed the recommendations and suggestions. Result: At the end of the 12 months of work, the consensus provided 62 recommendations for the diagnosis and treatment of pediatric sepsis in LMICs. Overall, 60 were strong recommendations, although 56 of these had a low level of evidence. Conclusions: These are the first consensus recommendations for the diagnosis and management of pediatric sepsis focused on LMICs, more specifically in Latin American countries. The consensus shows that, in these regions, where the burden of pediatric sepsis is greater than in high-income countries, there is little high-level evidence. Despite the limitations, this consensus is an important step forward for the diagnosis and treatment of pediatric sepsis in Latin America.
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    Letter: Development of a Randomized Trial Comparing ICP-Monitor-Based Management of Severe Pediatric Traumatic Brain Injury to Management Based on Imaging and Clinical Examination Without ICP Monitoring-Study Protocol
    (Wolters Kluwer Health, Inc., 2024) Nielsen, Katie; Caporal, Paula; Díaz, Franco; González-Dambrauskas, Sebastián; Vásquez-Hoyos, Pablo; Domínguez-Rojas, Jesús
    Pediatric traumatic brain injury is a major public health concern, particularly in resource-limited settings where this entity has higher incidence and mortality than developed nations. Despite the disproportionate burden of pediatric traumatic brain injury in low- and middle-income countries (LMICs), the current Brain Trauma Foundation guidelines are largely based on low-quality evidence generated in high-income countries (HICs).1 Adherence to guidelines is challenging in LMICs because of economic constraints, equipment availability, and human resources,2 which may explain disparities in outcomes. We applaud Chesnut et al3 for publishing a randomized controlled trial (RCT) protocol to test the hypothesis of whether intracranial pressure (ICP) monitoring improves outcomes in pediatric severe TBI (psTBI). The RCT will compare outcomes for children receiving ICP-based vs clinical examination and imaging-based management. Their main objective is to generate class I evidence regarding the impact of ICP-driven management in psTBI on long-term outcomes.
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    Mecánica pulmonar en el síndrome de distrés respiratorio agudo pediátrico asociado a COVID-19 aguda y MIS-C: implicaciones para las terapias y los resultados
    (Sociedad Chilena de Pediatría, 2023) Díaz, Franco; Domínguez-Rojas, Jesús; Coronado Muñoz, Álvaro; Luna-Delgado, Yesica; Alvarado-Gamarra, Giancarlo; Quispe Flores, Gaudi; Caqui-Vilca, Patrick; Atamari-Anahui, Noé; Muñoz Ramírez, Cleotilde Mireya; Tello-Pezo, Mariela; Cruces, Pablo; Vásquez-Hoyos, Pablo
    Objetivo: describir la mecánica pulmonar en el síndrome de distrés respiratorio agudo pediátrico (SDRAP) asociado a COVID-19 aguda y MIS-C con insuficiencia respiratoria. Métodos: se realizó un estudio observacional multicéntrico concurrente, analizando variables clínicas y mecánica pulmonar del SDRAP asociado a COVID-19 en 4 unidades de cuidados intensivos pediátricos (UCIP) del Perú. El análisis de subgrupos incluyó el SDRAP asociado a síndrome inflamatorio multisistémico en niños (MIS-C), MIS-PARDS, y el SDRAP con infección respiratoria primaria por COVID-19, C-PARDS. Además, se realizó un análisis de curva operador receptor (ROC) para mortalidad y mecánica pulmonar. Resultados: Se incluyeron 30 pacientes. La edad fue de 7,5(4-11) años, 60% varones y la mortalidad del 23%. El 47% correspondió al grupo MIS-PARDS y el 53% al grupo C-PARDS. C-PARDS tuvo RT-PCR positiva en el 67% y MIS-PARDS ninguna (p<0,001). El grupo C-PARDS presentaba una hipoxemia más profunda (relación P/F <100, 86% frente a 38%, p<0,01) y una presión de conducción más alta [14(10-22) frente a 10(10-12) cmH2O], así como una menor distensibilidad del sistema respiratorio (CRS) [0,5 (0,3-0,6) frente a 0,7(0,6-0,8) ml/kg/cmH2O] en comparación con MIS-PARDS (todos p<0,05). El análisis ROC para la mortalidad mostró que la presión de conducción tenía el mejor rendimiento [AUC 0,91(IC95%0,81-1,00), con el mejor punto de corte de 15 cmH2O (100% de sensibilidad y 87% de especificidad). La mortalidad en los C-PARDS fue del 38% y del 7% en los MIS-PARDS (p=0,09). Los días sin VM fueron 12(0-23) en la C-PARDS y 23(21-25) en la MIS-PARDS (p=0,02). Conclusiones: Los pacientes con C-PARDS, presentan características de mecánica pulmonar similares al SDRAP clásico de moderado a grave. Esto no se observó en los pacientes con MIS-C. Como se ha visto en otros estudios, una presión de conducción ≥ 15 cmH2O fue el mejor discriminador de mortalidad. Estos hallazgos pueden ayudar a guiar las estrategias de manejo ventilatorio para estas dos presentaciones diferentes.
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    Mechanical power in pediatric acute respiratory distress syndrome: A PARDIE study
    (BMC, 2022-01) Bhalla, Anoopindar K.; Klein, Margaret J.; I Alapont, Vincent Modesto; Emeriaud, Guillaume; Kneyber, Martin C. J.; Medina, Alberto; Cruces, Pablo; Díaz, Franco; Takeuchi, Muneyuki; Maddux, Aline B.; Mourani, Peter M.; Camilo, Cristina; White, Benjamin R.; Yehya, Nadir; Pappachan, John; Di Nardo, Matteo; Shein, Steven; Newth, Christopher; Khemani, Robinder; Pediatric Acute Lung Injury and Sepsis Investigators (PALISI) Network
    Background: Mechanical power is a composite variable for energy transmitted to the respiratory system over time that may better capture risk for ventilator-induced lung injury than individual ventilator management components. We sought to evaluate if mechanical ventilation management with a high mechanical power is associated with fewer ventilator-free days (VFD) in children with pediatric acute respiratory distress syndrome (PARDS).Methods:Retrospective analysis of a prospective observational international cohort study.Results:There were 306 children from 55 pediatric intensive care units included. High mechanical power was associated with younger age, higher oxygenation index, a comorbid condition of bronchopulmonary dysplasia, higher tidal volume, higher delta pressure (peak inspiratory pressure—positive end-expiratory pressure), and higher respiratory rate. Higher mechanical power was associated with fewer 28-day VFD after controlling for confounding variables (per 0.1 J·min−1·Kg−1 Subdistribution Hazard Ratio (SHR) 0.93 (0.87, 0.98), p=0.013). Higher mechanical power was not associated with higher intensive care unit mortality in multivariable analysis in the entire cohort (per 0.1 J·min−1·Kg−1 OR 1.12 [0.94, 1.32], p=0.20). But was associated with higher mortality when excluding children who died due to neurologic reasons (per 0.1 J·min−1·Kg−1 OR 1.22 [1.01, 1.46], p=0.036). In subgroup analyses by age, the association between higher mechanical power and fewer 28-day VFD remained only in children < 2-years-old (per 0.1 J·min−1·Kg−1 SHR 0.89 (0.82, 0.96), p=0.005). Younger children were managed with lower tidal volume, higher delta pressure, higher respiratory rate, lower positive end-expiratory pressure, and higher PCO2 than older children. No individual ventilator management component mediated the effect of mechanical power on 28-day VFD.Conclusions:Higher mechanical power is associated with fewer 28-day VFDs in children with PARDS. This association is strongest in children < 2-years-old in whom there are notable differences in mechanical ventilation management. While further validation is needed, these data highlight that ventilator management is associated with outcome in children with PARDS, and there may be subgroups of children with higher potential benefit from strategies to improve lung-protective ventilation. Take Home Message: Higher mechanical power is associated with fewer 28-day ventilator-free days in children with pediatric acute respiratory distress syndrome. This association is strongest in children <2-years-old in whom there are notable diferences in mechanical ventilation management.
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    Mielitis flácida aguda e infeccion por enterovirus: una enfermedad grave emergente.
    (Sociedad Chilena de Pediatría, 2022) Bustos B, Raúl; Díaz, Franco; Cores, Camila; Castro Z., Francisca; Cruces, Pablo
    La mielitis flácida aguda (MFA) es una enfermedad neuro inflamatoria de la medula espinal caracterizada por la aparición aguda de parálisis flácida asimétrica de predominio proximal y una lesión longitudinal de la sustancia gris de la médula espinal. Afecta principalmente a los niños y se ha descrito desde el año 2014 . Objetivo: Reportar una enfermedad pediátrica neurológica grave emergente en Chile. Casos Clínicos: Tres niños, (2 sexo femenino), rango de edad 4 - 6 años, previamente sanos, que tras infección respiratoria alta febril, presentaron una parálisis aguda asimétrica de predominio proximal en extremidades, que progresó en dos de ellos hacia tetraparesia. En todos se aisló enterovirus en el aspirado nasofaríngeo. En el líquido cefalorraquídeo presentaron pleocitosis, la resonancia magnética demostró hiperintesidad en T2 de la sustancia gris de la médula cervical. Todos ingresaron a cuidados intensivos (UCI) y dos requirieron ventilación mecánica (VM) . La terapia con corticoides, inmunoglobulina y plasmaféresis fue ineficaz. A 12 meses de seguimiento, un paciente permaneció tetrapléjico y dependiente de VM, otro falleció de arritmia ventricular en la UCI, el tercero permanece en rehabilitación con recuperación parcial. Conclusiones: Estos son los primeros reportes de esta enfermedad neurológica emergente en nuestro país. Frente a un niño con una parálisis aguda de extremidades de predominio proximal y asimétrica, los pediatras debemos tener un alto índice de sospecha de una MFA. Dado que puede progresar rápidamente y llevar a una insuficiencia respiratoria, la sospecha de MFA debe ser considerada como una emergencia médica.
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    Morphological differences between patient self-inflicted and ventilator-induced lung injury: an experimental study
    (American Thoracic Society, 2023-03) Díaz, Franco
    The role of supraphysiological airway pressure and VT in lung damage during mechanical ventilation (MV) has been studied in-depth, the phenomenon called ventilator-induced lung injury (VILI). Following the same principles, strenuous pontaneous breathing can also be harmful, and the concept of patient self-inflicted lung injury (P-SILI) is proposed (1). However, establishing P-SILI as a pathological entity in acute patients is challenging. There are few P-SILI models focusing on the respiratory effort during MV, showing histological damage in animals with intense respiratory effort (2–4). On the contrary, data regarding strong unassisted spontaneous breathing without MV is lacking. Therefore, we aimed to compare the histopathological findings in animals with acute lung injury (ALI) treated without ventilatory support, injurious MV, and protective MV.
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    Noninvasive continuous positive airway pressure is a lung- and diaphragm-protective approach in self-inflicted lung injury
    (The American Thoracis Society, 2024-04-15) Cruces, Pablo; Erranz, Benjamín; Pérez, Agustín; Reveco, Sonia; González, Carlos; Retamal, Jaime; Poblete, Daniela; Hurtado, Daniel E.; Díaz, Franco
    Strenuous spontaneous effort can promote lung and diaphragmatic injury in acute lung injury (ALI), phenomena known as “patient self-inflicted lung injury” (P-SILI) and load-induced diaphragmatic injury, respectively (1–3). Although continuous positive airway pressure (CPAP) can relieve hypoxemia and work of breathing (4), it is controversial if it prevents lung and diaphragmatic injury (5, 6). We aimed to investigate the effects of noninvasive CPAP on lung and diaphragmatic injury in an ALI model compared with unassisted animals.
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    Noninvasive ventilation for Pediatric Acute Respiratory Distress Syndrome: experience from the 2016/2017 Pediatric Acute Respiratory Distress Syndrome Incidence and Epidemiology Prospective Cohort Study
    (The Society of Critical Care Medicine; The World Federation of Pediatric Intensive and Critical Care Societies, 2023) Díaz, Franco; Emeriaud, Guillaume; Pons-Òdena, Marti; Bhalla, Anoopindar K.; Shein, Steven L.; Killien, Elizabeth Y.; Modesto i Alapont, Vicent; Rowan, Courtney; Baudin, Florent; Lin, John C.; Grégoire, Gabrielle; Napolitano, Natalie; Mayordomo-Colunga, Juan; Cruces, Pablo; Medina, Alberto; Smith, Lincoln; Khemani, Robinder G.
    Objectives: The worldwide practice and impact of noninvasive ventilation (NIV) in pediatric acute respiratory distress syndrome (PARDS) is unknown. We sought to describe NIV use and associated clinical outcomes in PARDS. Design: Planned ancillary study to the 2016/2017 prospective Pediatric Acute Respiratory Distress Syndrome Incidence and Epidemiology study. Setting: One hundred five international PICUs. Patients: Patients with newly diagnosed PARDS admitted during 10 study weeks. Interventions: None. Measurements and main results: Children were categorized by their respiratory support at PARDS diagnosis into NIV or invasive mechanical ventilation (IMV) groups. Of 708 subjects with PARDS, 160 patients (23%) received NIV at PARDS diagnosis (NIV group). NIV failure rate (defined as tracheal intubation or death) was 84 of 160 patients (53%). Higher nonrespiratory pediatric logistic organ dysfunction (PELOD-2) score, Pa o2 /F io2 was less than 100 at PARDS diagnosis, immunosuppression, and male sex were independently associated with NIV failure. NIV failure was 100% among patients with nonrespiratory PELOD-2 score greater than 2, Pa o2 /F io2 less than 100, and immunosuppression all present. Among patients with Pa o2 /F io2 greater than 100, children in the NIV group had shorter total duration of NIV and IMV, than the IMV at initial diagnosis group. We failed to identify associations between NIV use and PICU survival in a multivariable Cox regression analysis (hazard ratio 1.04 [95% CI, 0.61-1.80]) or mortality in a propensity score matched analysis ( p = 0.369). Conclusions: Use of NIV at PARDS diagnosis was associated with shorter exposure to IMV in children with mild to moderate hypoxemia. Even though risk of NIV failure was high in some children, we failed to identify greater hazard of mortality in these patients
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    Nueva morbilidad tras enfermedad crítica en niños latinoamericanos menores de 18 años con infección severa del tracto respiratorio inferior
    (Sociedad Chilena de Pediatría, 2023-01) Caporal, Paula; Vásquez-Hoyos, Pablo; Díaz, Franco; Monteverde-Fernández, Nicolás; Pedrozo, Luis; Carvajal, Cristóbal; Tellechea Rotta, Alexandre; González-Dambrauskas, Sebastián
    Objetivo: analizar el desarrollo de nuevas morbilidades adquiridas tras hospitalización por Infección del Tracto Respiratorio Inferior (ITRI) en unidades de cuidados intensivos pediátricos (UCIP). Pacientes y Método: Se incluyeron pacientes de 35 UCIP de 8 países, edades 0 a 18 años con diagnóstico de ITRI, dados de alta vivos, registrados entre abril 2018 y septiembre 2019, y que hayan requerido algún tipo de soporte ventilatorio (sistema de alto flujo, ventilación no invasiva o ventilación invasiva), incluidos en el registro de LARed Network, que incluye la Escala de Estado Funcional (FSS en inglés) validada en población pediátrica, que evalúa el estado funcional en seis dominios: estado mental, sensorial, comunicación, motor, alimentación y estado respiratorio. NM consideró ITRI posterior a su hospitalización y se definió como un incremento≥ 3 puntos en la FSS. Resultados: De 3280 niños con ITRI, 85 (2, 6%) desarrollaron NM, asociada a diagnósticos de sepsis y síndrome de dificultad respiratoria aguda (SDRA), infección por neumococo o por adenovirus, infecciones asociadas a la atención en salud y ventilación mecánica invasiva. La infección por adenovirus, el SDRA y las IAH se asociaron de forma independiente con NM. Conclusiones: Observamos que el desarrollo de NM al egreso de UCIP es infrecuente, pero está asociada a factores de riesgo modificables. Estos datos definen ciertos grupos de riesgo para realizar futuras intervenciones e iniciativas en la mejora de la calidad de atención.
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    Pediatric ARDS phenotypes in critical COVID-19: implications for therapies and outcomes
    (Yale University; Cold Spring Harbor Laboratory (CSHL), 2022-06) Díaz, Franco; Domínguez-Rojas, Jesús; Luna-Delgado, Yesica; Caqui-Vilca, Patrick; Martel-Ramírez, Carlos; Quispe-Chipana, Miguel; Cruz-Arpi, Mario; Atamari-Anahui, Noé; Muñoz Ramírez, Cleotilde Mireya; Quispe Flores, Gaudi; Tello-Pezo, Mariela; Cruces, Pablo; Vásquez-Hoyos, Pablo
    Purpose to describe lung mechanics in Pediatric Acute Respiratory Disease Syndrome (PARDS) associated with COVID-19. We hypothesize two phenotypes according to respiratory system mechanics and clinical diagnosis. Methods a concurrent multicenter observational study was performed, analyzing clinical variables and pulmonary mechanics of PARDS associated with COVID-19 in 4 Pediatric intensive care units (PICUs) of Perú. Subgroup analysis included PARDS associated with multisystem inflammatory syndrome in children (MIS-C), MIS-PARDS, and PARDS with COVID-19 primary respiratory infection, C-PARDS. In addition, receiver operator curve analysis (ROC) for mortality was performed. Results 30 patients were included. Age was 7.5(4-11) years, 60% male, and mortality 23%. 47% corresponded to MIS-PARDS and 53% to C-PARDS phenotypes. C-PARDS had positive RT-PCR in 67% and MIS-PARDS none (p<0.001). C-PARDS group had more profound hypoxemia (P/Fratio<100, 86%vs38%,p<0.01) and higher driving-pressure (DP) [14(10-22)vs10(10-12)cmH2O], and lower compliance of the respiratory system (CRS)[0.5(0.3-0.6)vs 0.7(0.6-0.8)ml/kg/cmH2O] compared to MIS-PARDS (all p<0.05). ROC-analysis for mortality showed that DP had the best performance [AUC 0.91(95%CI0.81-1.00), with the best cut-point of 15 cmH2O (100% sensitivity and 87% of specificity). Mortality in C-PARDS was 38% and 7% in MIS-PARDS(p=0.09). MV free-days were 12(0-23) in C-PARDS and 23(21-25) in MIS-PARDS(p=0.02) Conclusion critical pediatric COVID-19 is heterogeneous in children. COVID-19 PARDS had two phenotypes with distinctive pulmonary mechanics features. Characteristics of C-PARDS are like a classic primary PARDS, while a decoupling between compliance and hypoxemia was more frequent in MIS-PARDS. In addition, C-PARDS had fewer MV free-days. DP ≥ 15 cmH2O had the best performance of the quasi-static calculations to discriminate for mortality. Standardized pulmonary mechanics measurements in PARDS might reveal essential information to tailor the ventilatory strategy in pediatric critical COVID-19.
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    Pericarditis posterior a la administración de vacuna mRNA contra COVID-19
    (Sociedad Chilena de Pediatría, 2021) Díaz, Franco; Ampuero, Camila; Donoso F., Alejandro
    Tal como fue descrito previamente, la vacuna mRNA no tiene el virus en su estructura, por lo que las causas de inflamación miocárdica aún no están precisadas, postulando mecanismos como inmunidad cruzada, autoanticuerpos, efecto de las proteínas S circulantes, entre otros. El riesgo beneficio de la administración de vacunas mRNA en adolescentes entre 12 y 18 años, únicas aprobadas a la fecha para ese grupo de edad, es un tema de debate candente en la actualidad. Desde el punto de vista epidemiológico, el uso de vacunas en adolescentes previene un número mucho mayor de casos, hospitalizaciones y cuadros graves. Estas estimaciones fueron realizadas durante el pico de casos de la pandemia, con una alta circulación viral en la comunidad, por lo que pudieran ser diferentes en situaciones futuras con pocos casos en una población adulta vacunada