Evaluation of Clinical Efficacy of Modified Houpo Dahuangtang in Moderate and Severe ARDS Patients Based on Electrical Impedance Tomography / 中国实验方剂学杂志

ObjectiveTo evaluate the clinical efficacy of modified Houpo Dahuangtang in moderate and severe acute respiratory distress syndrome （ARDS） patients with phlegm-heat accumulation，and monitor the pulmonary ventilation changes of patients before and after treatment by electrical impedance tomography（EIT）. MethodThe 62 cases of moderate and severe ARDS patients with phlegm-heat accumulation who required mechanical ventilation in the department of intensive care unit （ICU） in Chongqing Hospital of Traditional Chinese Medicine from September 2021 to June 2022 were selected，and divided into an experimental group（31 cases）and a control group（31 cases）using a random number table. On the basis of regular Western medicine treatment，the experimental group received modified Houpo Dahuangtang and the control group received warm water by a nasogastric tube for seven days. The changes in the clinical efficacy of traditional Chinese medicine（TCM），the oxygenation index［arterial oxygen partial pressure （PaO2）/fractional inspired oxygen（FiO2），P/F］，lactic acid（Lac），acute physiology and chronic health evaluation Ⅱ（APACHE Ⅱ） score，compliance，plateau pressure，gas distribution parameters monitored by EIT（Z1，Z2，Z3 and Z4），inflammatory factors［interleukin-6 （IL-6），IL-10， tumor necrosis factor-α （TNF-α） and C-reactive protein （CRP）］ of both groups before and after treatment were recorded. Besides， the mechanical ventilation time， length of stay in ICU， 28-day mortality and incidence of adverse reactions（delirium，abdominal pain and diarrhea）in the two groups were also observed. ResultThere was no significant difference in the baseline indexes of patients in the two groups，and thus the two groups were comparable. After treatment for one week， the total effective rate for TCM syndromes in the experimental group was 90.30%（28/31）， higher than the 67.74%（21/31）in the control group（Z=-2.415，P<0.05）.Compared with the same group before treatment， the plateau pressure and Lac decreased （P<0.01）and the compliance and P/F increased （P<0.01） in experimental group， while the Lac decreased （P<0.05）and the P/F increased （P<0.05）， and the compliance and plateau pressure did not change significantly in the control group. After treatment，the plateau pressure and inflammatory factors in the experimental group were lower than those in the control group（P<0.05）， but the compliance and P/F in the experimental group were higher than those in the control group（P<0.05）， and the gas distribution parameters Z1，Z2，Z3，Z4，Z1+Z2，and Z3+Z4 monitored by EIT in the experimental group were all higher than those in the control group （P<0.05）. There was no significant difference in mechanical ventilation time， ICU hospitalization time， 28-day mortality， delirium， abdominal pain， diarrhea and other adverse reactions between the two groups. ConclusionModified Houpo Dahuangtang can significantly improve the P/F，pulmonary ventilation in gravity-dependent regions and pulmonary compliance，reduce the release of inflammatory factors in moderate and severe ARDS patients. Compared with conventional methods，EIT can timely monitor the pulmonary ventilation changes in ARDS patients，which suggests its clinical feasibility.

Efficacy of prone positioning ventilation in acute respiratory distress syndrome after acute Stanford type A aortic dissection surgery / 中国胸心血管外科临床杂志

@#Objective     To explore the efficacy of prone positioning ventilation in patients with acute respiratory distress syndrome (ARDS) after acute Stanford type A aortic dissection (STAAD) surgery. Methods     From November 2019 to September 2021, patients with ARDS who was placed prone position after STAAD surgery in the Xiamen Cardiovascular Hospital of Xiamen University were collected. Data such as the changes of blood gas, respiratory mechanics and hemodynamic indexes before and after prone positioning, complications and prognosis were collected for statistical analysis. Results    A total of 264 STAAD patients had surgical treatment, of whom 40 patients with postoperative ARDS were placed prone position. There were 37 males and 3 females with an average age of 49.88±11.46 years. The oxygen partial pressure, oxygenation index and peripheral blood oxygen saturation 4 hours and 12 hours after the prone positioning, and 2 hours and 6 hours after the end of the prone positioning were significantly improved compared with those before prone positioning ventilation (P<0.05). The oxygenation index 2 hours after the end of prone positioning which was less than 131.42 mm Hg, indicated that the patient might need ventilation two or more times of prone position. Conclusion     Prone position ventilation for patients with moderate to severe ARDS after STAAD surgery is a safe and effective way to improve the oxygenation.

Driving pressure, as opposed to tidal volume based on predicted body weight, is associated with mortality: results from a prospective cohort of COVID-19 acute respiratory distress syndrome patients / Driving pressure, em oposição ao volume corrente ajustado para o peso corporal predito, associa-se com a mortalidade: resultados de uma coorte prospectiva de pacientes com síndrome do desconforto respiratório agudo por COVID-19

ABSTRACT Objective: To evaluate the association between driving pressure and tidal volume based on predicted body weight and mortality in a cohort of patients with acute respiratory distress syndrome caused by COVID-19. Methods: This was a prospective, observational study that included patients with acute respiratory distress syndrome due to COVID-19 admitted to two intensive care units. We performed multivariable analyses to determine whether driving pressure and tidal volume/kg predicted body weight on the first day of mechanical ventilation, as independent variables, are associated with hospital mortality. Results: We included 231 patients. The mean age was 64 (53 - 74) years, and the mean Simplified Acute and Physiology Score 3 score was 45 (39 - 54). The hospital mortality rate was 51.9%. Driving pressure was independently associated with hospital mortality (odds ratio 1.21, 95%CI 1.04 - 1.41 for each cm H2O increase in driving pressure, p = 0.01). Based on a double stratification analysis, we found that for the same level of tidal volume/kg predicted body weight, the risk of hospital death increased with increasing driving pressure. However, changes in tidal volume/kg predicted body weight were not associated with mortality when they did not lead to an increase in driving pressure. Conclusion: In patients with acute respiratory distress syndrome caused by COVID-19, exposure to higher driving pressure, as opposed to higher tidal volume/kg predicted body weight, is associated with greater mortality. These results suggest that driving pressure might be a primary target for lung-protective mechanical ventilation in these patients.

RESUMO Objetivo: Avaliar a associação entre driving pressure e volume corrente ajustado pelo peso predito com a mortalidade em uma coorte de pacientes com síndrome do desconforto respiratório agudo por COVID-19. Métodos: Estudo prospectivo e observacional que incluiu pacientes com síndrome do desconforto respiratório agudo por COVID-19 admitidos em duas unidades de terapia intensiva. Foi realizada análise multivariada para determinar se a driving pressure e o volume corrente/kg de peso predito, aferidos no primeiro dia de ventilação mecânica, associavam-se de forma independente com a mortalidade hospitalar. Resultados: Foram incluídos 231 pacientes. A mediana de idade foi de 64 (53 - 74) anos, e a mediana do Simplified Acute and Physiology Score 3 foi de 45 (39 - 54). A mortalidade hospitalar foi de 51,9%. A driving pressure se associou de forma independente com a mortalidade hospitalar (razão de chance de 1,21; IC95% de 1,04 - 1,41 para cada cm H2O de aumento da driving pressure, p = 0,01). Com base na análise de dupla estratificação, encontrou-se que, para o mesmo nível de volume corrente/kg de peso predito, o risco de mortalidade hospitalar aumentava com o incremento da driving pressure. No entanto, mudanças no volume corrente/kg de peso predito não se associaram com a mortalidade quando não resultavam em aumento da driving pressure. Conclusão: Em pacientes com síndrome do desconforto respiratório agudo por COVID-19, exposição a maior driving pressure, ao contrário da exposição a maior volume corrente/kg de peso predito, associou-se com maior mortalidade hospitalar. Os resultados sugerem que a driving pressure poderia ser o alvo primário para a condução da ventilação mecânica protetora nesses pacientes.

Puntaje APP como predictor de mortalidad en pacientes con síndrome de dificultad respiratoria agudo grave por COVID-19 en un hospital referencial del norte del Perú / APP score as a predictor of mortality in patients with severe acute respiratory distress syndrome due to COVID-19 in a reference hospital in northern of Peru

INTRODUCCIÓN: La mortalidad por pacientes por COVID-19 grave que desarrollaban neumonía grave y síndrome de dificultad respiratoria agudo (SDRA) grave ha sido significativa a pesar del tratamiento oportuno. Es importante determinar predictores tempranos de enfermedad que nos ayuden a estratificar aquellos pacientes con mayor riesgo de fallecer. Se pretende estudiar el comportamiento del puntaje APP (APPS) como predictor de ello, basados en algunos reportes de uso y utilidad en el SDRA. no COVID-19. OBJETIVO: Determinar si el APPS es útil como predictor de mortalidad en SDRA. por COVID-19 grave. PACIENTES Y MÉTODO: Se realizó un estudio tipo cohorte retrospectivo, incluyendo pacientes de la Unidad de Cuidados Intensivos (UCI), con SDRA. por COVID-19 grave, que ingresaron a la UCI del Hospital Regional Docente de Trujillo (HRDT) en el período abril 2020- abril 2021. Se evalúo la utilidad del APPS como predictor de mortalidad em dicha población. RESULTADOS: El APPS demostró ser un factor asociado a mortalidad en pacientes con SDRA. y COVID-19 grave (RPa 1,34; IC 95% 1,16 a 1,56; p < 0,001). Además, encontramos que, al realizar un modelo de predicción ajustado por edad, sexo, SOFA, APPS, shock, Indice de Charlson (ICh), se comportan como factores asociados a mortalidad el APPS, el sexo masculino (RPa: 1,48; IC 95% 1,09 a 2,049; p < 0,05) y el ICh (RPa: 1,11; IC 95% 1,02 a 1,21; p < 0,05). CONCLUSIÓN: El APPS, el sexo masculino y el ICh son predictores de mortalidad en SDRA. por COVID-19 grave.

BACKGROUND: Mortality in patients with severe COVID-19 who developed severe pneumonia and severe Acute Respiratory Distress Syndrome (ARDS) has been significant despite timely treatment. It is important to determine early predictors of disease that help us to stratify those patients with a higher risk of death. It is intended to study the behavior of the APPS score as a predictor of this, based on some reports of use and usefulness in non-COVID-19 ARDS. AIM: To determine if the APP score is useful as a predictor of mortality in ARDS due to severe COVID-19. METHOD: A retrospective cohort study was carried out, including patients from the Intensive Care Unit (ICU) with ARDS due to severe COVID-19 who were admitted to the ICU of the Trujillo Regional Teaching Hospital (HRDT) in the period March 2020 to March 2021. The usefulness of the APP score as a predictor of mortality in mentioned population was evaluated. RESULTS: The APP score proved to be a factor associated with mortality in patients with ARDS and severe COVID-19 (APR 1.34; 95% CI 1.16 to 1.56; p < 0.001). We also found that when performing a prediction model adjusted for age, sex, SOFA, APP score, shock and Charlson Index (ICh) we found that the APP score, male sex (APR: 1.48; 95% CI 1.09 to 2.049; p < 0.05) and the ICh behave as factors associated with mortality (RPa: 1.11; 95% CI 1.02 to 1.21; p < 0.05). CONCLUSION: The APP score, male sex, and ICh are predictors of mortality in ARDS due to severe COVID-19.

Effects of atelectatic areas on the surrounding lung tissue during mechanical ventilation in an experimental model of acute lung injury induced by lipopolysaccharide / Efeitos das áreas atelectásicas no tecido pulmonar circundante durante a ventilação mecânica em um modelo experimental de lesão pulmonar aguda induzida por lipopolissacarídeo

ABSTRACT Objective: To assess the effect of atelectasis during mechanical ventilation on the periatelectatic and normal lung regions in a model of atelectasis in rats with acute lung injury induced by lipopolysaccharide. Methods: Twenty-four rats were randomized into the following four groups, each with 6 animals: the Saline-Control Group, Lipopolysaccharide Control Group, Saline-Atelectasis Group, and Lipopolysaccharide Atelectasis Group. Acute lung injury was induced by intraperitoneal injection of lipopolysaccharide. After 24 hours, atelectasis was induced by bronchial blocking. The animals underwent mechanical ventilation for two hours with protective parameters, and respiratory mechanics were monitored during this period. Thereafter, histologic analyses of two regions of interest, periatelectatic areas and the normally-aerated lung contralateral to the atelectatic areas, were performed. Results: The lung injury score was significantly higher in the Lipopolysaccharide Control Group (0.41 ± 0.13) than in the Saline Control Group (0.15 ± 0.51), p < 0.05. Periatelectatic regions showed higher lung injury scores than normally-aerated regions in both the Saline-Atelectasis (0.44 ± 0.06 x 0.27 ± 0.74 p < 0.05) and Lipopolysaccharide Atelectasis (0.56 ± 0.09 x 0.35 ± 0.04 p < 0.05) Groups. The lung injury score in the periatelectatic regions was higher in the Lipopolysaccharide Atelectasis Group (0.56 ± 0.09) than in the periatelectatic region of the Saline-Atelectasis Group (0.44 ± 0.06), p < 0.05. Conclusion: Atelectasis may cause injury to the surrounding tissue after a period of mechanical ventilation with protective parameters. Its effect was more significant in previously injured lungs.

RESUMO Objetivo: Avaliar o efeito da atelectasia durante a ventilação mecânica nas regiões periatelectáticas e pulmonares normais em um modelo de atelectasia em ratos com lesão pulmonar aguda induzida por lipopolissacarídeo. Métodos: Foram distribuídos aleatoriamente 24 ratos em quatro grupos, cada um com 6 animais: Grupo Salina-Controle, Grupo Lipopolissacarídeo-Controle, Grupo Salina-Atelectasia e Grupo Lipopolissacarídeo-Atelectasia. A lesão pulmonar aguda foi induzida por injeção intraperitoneal de lipopolissacarídeo. Após 24 horas, a atelectasia foi induzida por bloqueio brônquico. Os animais foram submetidos à ventilação mecânica por 2 horas com parâmetros ventilatórios protetores, e a mecânica respiratória foi monitorada durante esse período. Em seguida, foram realizadas análises histológicas de duas regiões de interesse: as áreas periatelectásicas e o pulmão normalmente aerado contralateral às áreas atelectásicas. Resultados: O escore de lesão pulmonar foi significativamente maior no Grupo Controle-Lipopolissacarídeo (0,41 ± 0,13) do que no Grupo Controle-Solução Salina (0,15 ± 0,51), com p < 0,05. As regiões periatelectásicas apresentaram escores maiores de lesão pulmonar do que as regiões normalmente aeradas nos Grupos Atelectasia-Solução Salina (0,44 ± 0,06 versus 0,27 ± 0,74, p < 0,05) e Atelectasia-Lipopolissacarídeo (0,56 ± 0,09 versus 0,35 ± 0,04, p < 0,05). O escore de lesão pulmonar nas regiões periatelectásicas foi maior no Grupo Atelectasia-Lipopolissacarídeo (0,56 ± 0,09) do que na região periatelectásica do Grupo Atelectasia-Solução Salina (0,44 ± 0,06), p < 0,05. Conclusão: A atelectasia pode causar lesão no tecido circundante após um período de ventilação mecânica com parâmetros ventilatórios protetores. Seu efeito foi mais significativo em pulmões previamente lesionados.

Características de pacientes con SARS-CoV-2 en estado crítico en un centro COVID-19 de referencia en Uruguay

Introducción: la pandemia de COVID-19 produjo una alta mortalidad en el mundo. Sin embargo, las presentaciones más críticas de la enfermedad han sido poco caracterizadas en nuestra región. Objetivo: estudiar la presentación clínica, evolución y mortalidad en pacientes ingresados en la unidad de medicina intensiva de un centro COVID-19 de referencia. Pacientes y método: estudio clínico, prospectivo, observacional de SARS-CoV-2 durante las primeras etapas de la pandemia en Uruguay. Se definió mortalidad en unidad de cuidados intensivos (UCI) como desenlace primario. Resultados: en 274 pacientes, la edad mediana fue de 65 años (IQR 54-73), el sexo masculino representó el 57% y el índice de Charlson tuvo una mediana de 3 (IQR 2-5). La mortalidad en UCI fue 59,9%. Las principales causas de muerte fueron: hipoxemia refractaria, disfunción orgánica múltiple y shock refractario. La edad (Odds Ratio (OR) = 1,06; IC de 95% 1,03 - 1,09), ocupación de camas (OR = 1,04, IC 95%: 1,02 - 1,07), sexo masculino (OR = 2,14, IC 95%: 0,93 - 5,06), ventilación mecánica invasiva (OR = 51,7, IC 95%: 16,5 - 208,6), coinfección al ingreso (OR = 2,34, IC 95%: 0,88 - 6,77) y enfermedad renal crónica previa (OR = 13,1, IC 95%: 2,29 - 129,2) fueron predictores independientes de mortalidad. La primera ola de la pandemia se produjo por la circulación de las variantes P.6 y P.1 del coronavirus, en una población con muy bajo porcentaje de vacunación (8%). Conclusiones: estos resultados en pacientes críticos aportan una descripción detallada del impacto de la pandemia por SARS-CoV-2 en un centro de referencia y constituyen una base para enfrentar futuros eventos epidémicos.

Introduction: COVID-19 has caused high mortality worldwide. However, the most critical presentations of the disease have been poorly characterized in our region. Objective: to study the clinical presentation, progression, and mortality in patients admitted to the Intensive Care Unit (ICU) of a COVID-19 Reference Center. Patients and methods: clinical, prospective, observational study of SARS-CoV-2 during the early stages of the pandemic in Uruguay. ICU mortality was defined as the primary outcome. Results: in 274 patients, the median age was 65 years (IQR 54-73), male gender accounted for 57%, and the Charlson Index was 3 (IQR 2-5). ICU mortality was 59.9%. The main causes of death were refractory hypoxemia, multiple organ dysfunction, and refractory shock. Age (Odds Ratio (OR) = 1.06; 95% CI 1.03 - 1.09), bed occupancy (OR= 1.04, 95% CI: 1.02 -1.07), male gender (OR= 2.14, 95% CI 0.93 - 5.06), invasive mechanical ventilation (OR= 51.7, 95% CI 16.5 - 208.6), coinfection at admission (OR= 2.34, 95% CI 0.88 - 6.77), and pre-existing chronic kidney disease (OR= 13.1, 95% CI 2.29 - 129.2) were independent predictors of mortality. The first wave of the pandemic was driven by the circulation of the P.6 and P.1 variants of the coronavirus in a population with a very low vaccination percentage (8%). Conclusions: these results in critical patients provide a detailed description of the impact of the SARS-CoV-2 pandemic in a reference center and serve as a foundation for addressing future epidemic events.

Introdução: a COVID-19 causou alta morbimortalidade em todo o mundo, embora as formas graves da doença tenham sido pouco caracterizadas nos países da América Latina. Objetivos: analisar o quadro clínico, a evolução e a mortalidade em pacientes com COVID-19 atendidos em uma unidade de terapia intensiva (UTI) em um Centro de Referência. Métodos: Estudo clínico, prospectivo e observacional de pacientes com SARS-CoV-2 durante a primeira onda da pandemia no Uruguai. A mortalidade na UTI foi o resultado primário. Resultados: oram estudados 274 pacientes, com uma mediada de idade de 65 anos (IQR 54-73), sendo a maioria do sexo masculino (57%). O índice de Charlson foi de 3 (IQR 2-5). A mortalidade geral na UTI foi de 59,9%. As principais causas de morte foram hipoxemia refratária, disfunção orgânica múltipla e choque refratário. A idade (Odds Ratio (OR) = 1,06; IC 95% 1,03-1,09), ocupação de leitos (OR = 1,04; IC 95%: 1,02-1,07), sexo masculino (OR = 2,14; IC 95%: 0,93-5,06), ventilação mecânica invasiva (OR = 51,7; IC 95%: 16,5-208,6), coinfecção na admissão (OR = 2,34; IC 95%: 0,88-6,77) e doença renal crônica pré-existente (OR = 13,1; IC 95%: 2,29-129,2) foram preditores independentes de mortalidade. A primeira onda da pandemia foi impulsionada pela circulação das variantes P.6 e P.1 do SARS-CoV-2 em uma população com uma taxa de vacinação muito baixa (8%). Conclusões: esses resultados em pacientes críticos fornecem uma descrição detalhada do impacto da pandemia SARS-CoV-2 em um Centro de Referência e constituem uma base para o enfrentamento de futuros eventos epidêmicos.

Uso de cánula nasal de alto flujo artesanal como oxigenoterapia en insuficiencia respiratoria por COVID-19 / Use of artisanal high flow nasal cannula as oxygen therapy in respiratory failure due to COVID-19

Los riesgos asociados a la neumonía por (SARS-CoV-2) es la generación de insuficiencia respiratoria secundaria que en algunos casos desencadenara al tan temido síndrome de distres respiratorio (SDRA); Informes sobre atención clínica, indican que tiene una incidencia (SDRA) de 3-10 % con necesidad de Asistencia Respiratoria Mecánica (ARM) en pacientes hospitalizados; por lo que dispositivos de oxigenación no invasivos siguen siendo una opción atractiva, de forma inicial. Caso clínico: mujer de 47 años con insuficiencia respiratoria secundario a neumonía por COVID-19, por la gravedad se indica su ingreso a terapia intensiva, pero por razones de falta de unidad es manejada en unidad respiratoria, con el uso de dispositivos de oxigenación de armado ARTESAL, de manera exitosa, con la utilización de CNAF-artesanal, se pretende mejorar el trabajo respiratorio, índices de oxigenación, mientras se da tratamiento a la infección por el COVID-19; el objetivo del presente caso es reportar el presente caso con evolución favorable a la literatura disponible. Discusión: El uso de terapia de oxigenación con dispositivo de Cánula Nasal de Alto Flujo, aún no ha sido normatizado en pacientes con COVID-19, pero existe evidencia clínica sobre los efectos beneficiosos en la insuficiencia respiratoria en neonatos mas no en adultos. Conclusión: El uso temprano de la CNAF-artesanal en la insuficiencia respiratoria resulta muy atractivo, más aún con dispositivo de confección artesanal, da una opción más al paciente fuera de UTI, pudiendo apoyar en evitar la intubación y su ingreso a ventilación mecánica.

The risks associated with pneumonia (SARS-CoV-2) is the generation of secondary respiratory failure that in some cases will trigger the much feared respiratory distress syndrome (ARDS); Reports on clinical care indicate that it has an incidence (ARDS) of 3-10% with the need for Mechanical Respiratory Assistance (ARM) in hospitalized patients; so non-invasive oxygenation devices remain an attractive option, initially. Clinical case: a 47-year-old woman with respiratory failure secondary to covid-19 pneumonia. Due to the severity, her admission to intensive care is indicated, but for reasons of lack of unity, she is managed in a common room, with the use of high-pressure oxygenation devices. ARTISAL assembly, successfully, with the use of CNAF-artisanal, is intended to improve the work of breathing, and oxygenation indices, while treating the infection by COVID-19; The objective of this case is to report the present case with a favorable evolution based on the available literature. Discussion: The use of oxygenation therapy with a High Flow Nasal Cannula device has not yet been standardized in patients with COVID-19, but there is clinical evidence on the beneficial effects in respiratory failure in neonates but not in adults. Conclusion: The early use of the artisan HFNC in respiratory failure is very attractive, even more so with an artisanal device, it gives the patient another option outside the ICU, being able to help avoid intubation and admission to mechanical ventilation.

ARDS with septic shock managed successfully using a multidisciplinary approach: A case report

Acute respiratory distress syndrome (ARDS) is an inflammatory process in the lungs that results in hypoxemia and decreased lung compliance. Invasive mechanical ventilation and prone positioning have proven benefits in the management of patients with severe ARDS. Post-extubation rehabilitation programs are equally important for the recovery of these patients. We are reporting the case of a 30-year-old male with severe ARDS where lung protective ventilation, timely intubation, early prone positioning, multidisciplinary communication, and post-discharge follow-up with teleconsultation were used under expert supervision in the successful management of the case

Pronação de pacientes com Síndrome do Desconforto Respiratório Agudo: criação e validação de cenário simulado / Pronation of patients with Acute Respiratory Distress Syndrome: creation and validation of a simulated scenario

Resumo: Trata-se de um estudo metodológico para construção e validação de um cenário simulado com abordagem interprofissional, que permitirá a utilização no ensino e na educação permanente de profissionais da saúde por meio da metodologia ativa de simulação clínica. Este estudo foi realizado em uma universidade pública da região Sul do Brasil, objetivando construir e validar um cenário simulado para a pronação de pacientes críticos com Síndrome do Desconforto Respiratório Agudo (SDRA). Para isto, o estudo ocorreu em duas etapas: revisão de conteúdo, construção do cenário e de validação de conteúdo e de aparência por juízes. A revisão da literatura permitiu conhecer melhor sobre o manejo do paciente com SDRA, bem como subsidiar o desenvolvimento do caso clínico para o cenário. Um protocolo de pronação segura de um hospital universitário foi adotado. A partir desta revisão, a construção do cenário foi realizada considerando um roteiro validado. Como parte desta construção, surgiram como resultados: a descrição do cenário; a relação de materiais e equipamentos necessários para o desenvolvimento do cenário; o roteiro para o ator simulado; o guia de apoio ao facilitador; o guia de apoio ao participante; o quadro de apoio para tomada de decisão e o checklist de observação do desenvolvimento de competências e habilidades para cada profissão envolvida no cenário. Onze juízes participaram do estudo. Em relação ao perfil sociodemográfico dos juízes, a amostra foi predominantemente de enfermeiros (63,6%), seguido por fisioterapeutas (18,1%), médico (9%) e docente de enfermagem (9%). Para medir o percentual de concordância entre os juízes, adotou-se o Índice de Validade de Conteúdo (IVC) para os itens, que foram agrupados de acordo com unidades de significância. Após a leitura do cenário, os juízes responderam a um questionário do tipo Likert com 37 itens, que abordaram sobre a "Experiência Prévia do Participante/Briefing", "Conteúdo/Objetivos"; "Recursos Humanos"; "Preparo do Cenário", "Desenvolvimento do Cenário" e "Avaliação". Todos os itens obtiveram IVC superior ao desejável (0,80) e, portanto, foram considerados válidos. Além disso, os juízes realizaram sugestões de melhorias no cenário, aos quais foram acatadas ou rejeitas e discutidas com a literatura disponível. Este estudo permitiu criar e validar um cenário que reflete a prática real, ao mesmo tempo que oportuniza um ambiente seguro para os participantes e responde aos objetivos da aprendizagem.

Abstract: This is a methodological study for the construction and validation of a simulated scenario with an interprofessional approach, which will allow the use in the teaching and continuing education of health professionals through the active methodology of clinical simulation. This study was carried out in a public university in the South region of Brazil, aiming to build and validate a simulated scenario for the pronation of critically ill patients with Acute Respiratory Distress Syndrome (ARDS). To this end, the study occurred in two stages: content review, scenario construction, and content and appearance validation by judges. The literature review provided a better understanding of the management of the ARDS patient, as well as a basis for developing the clinical case for the scenario. A safe pronation protocol from a university hospital was adopted. Based on this review, the scenario was built using a validated script. As part of this process, the following results emerged: the description of the scenario; the list of materials and equipment needed for the development of the scenario; the script for the simulated actor; the facilitator support guide; the participant support guide; the decision support framework; and the checklist for observing the development of competencies and skills for each profession involved in the scenario. Eleven judges participated in the study. Regarding the sociodemographic profile of the judges, the sample was predominantly nurses (63.6%), followed by physical therapists (18.1%), physicians (9%), and nursing professors (9%). To measure the percentage of agreement between the judges, the Content Validity Index (CVI) was adopted for the items, which were grouped according to significance units. After reading the scenario, the judges answered a Likert-type questionnaire with 37 items, which addressed "Prior Participant Experience/Briefing", "Content/Objectives"; "Human Resources"; "Scenario Preparation", "Scenario Development", and "Evaluation". All items scored higher than desirable CVI (0.80) and were therefore considered valid. In addition, the judges made suggestions for improvements in the scenario, which were accepted or rejected and discussed with the available literature. This study made it possible to create and validate a scenario that reflects actual practice, while providing a safe environment for participants and meeting the learning objectives.

Stroke � Next Wave of Complications from COVID-19

Since the declaration of COVID-19 infection as Pandemic in March, 2020, There has been rise in Multisystem Complications apart from regular Acute Respiratory Syndrome which is hallmark of COVID-19 infection. As the second wave surge of COVID-19 has occurred, most of the patients already suffered from dyspnoea but also rare complications like CVA (Infarct and Haemorrhage) , Seizure and altered sensorium related to Hypoxic Brain Injury. COVID-19 frequently presents with a state of altered coagulability which increases the risk of pulmonary embolism and other Thrombotic events such as Cerebrovascular events. This case report is limited to Neurological complications seen in COVID-19 Infected patients

COVID-19-mediated pulmonary fibrosis: from mechanisms to medicines / 中国药理学通报

Coronavirus disease-19 (COVID-19), a global epidemic caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), lead to lung injury in millions of people. SARS-CoV-2 can not only cause cytokine storm, acute respiratory distress syndrome and respiratory failure in the phase of acute infection, but also have potential long-term effects on the lungs. Survivors of severe COVID-19 may develop pulmonary fibrosis, resulting in permanent lung injury. In this review we expound the occurrence and development of COVID-19-related pulmonary fibrosis, summarize the key roles of TGF-p/Smad, TGF-fV MAPK, JAK/STAT, Wnt/(3-catenin, YAP/TAZ, NF-KB and PI3K/Akt signal pathways in this process, and analyze the advantages and disadvantages of antiviral drugs, anti-fibrosis drugs, cytokine-targeted drugs, corticosteroids, spironolactone, traditional Chinese medicine prescriptions and lung transplantation in its treatment. This review may provide a reference for the study of pathological mechanism and clinical treatment of COVID-19-re-lated pulmonary fibrosis.

The effect of high dose hyperbaric ozone autologous blood therapy(HOT) on oxygenation index and inflammatory factor level in ARDS dogs / 中国输血杂志

【Objective】 To investigate the effects of high-dose hyperbaric trioxygen autologous blood therapy (HOT) on oxygenation index (PaO2/FiO2) and serum inflammatory factors in dogs with acute respiratory distress syndrome (ARDS). 【Methods】 Twelve healthy adult beagles were randomly divided into 3 groups (n=4). The blank group was injected with normal saline intravenously. The ARDS model was established by intravenous injection of oleic acid (0.12 mL/kg) in the ARDS group and ARDS+ HOT group. The mark of a successful model is that the oxygen and index (PaO2/FiO2) <300 mmHg. In the ARDS+ HOT group, after the ARDS model was established, 16 G indwelling needle was used to puncture the left femoral vein and connect the line of the HOT device. Venous blood (50 mL/ dog) was collected from the femoral vein under negative pressure to the blood storage bottle (100 mL blood storage bottle), and then the blood collection was stopped and the gas injection switch of the HOT device was turned on. Inject 50 mL of 20ng/dL trioxygen gas into the blood storage bottle. After gas injection, turn the blood storage bottle upside down three times to fully trioxidize the blood and then inject it back into the dog. Repeat this treatment for 10 cycles. PaO2 and PaO2/FiO2 were detected before treatment and at 1, 2, 3, 4, 5 h after treatment. The serum was retained after treatment, and the expressions of inflammatory cytokines (IL-6, IL-8) and myeloperoxidase (MPO) were detected by ELISA. The animals were euthanized, and the gross lung morphology of the dogs was observed at autopsy. The dorsal segment of the left lower lobe of the lung was taken for pathological section HE staining, and the morphological changes of the lung tissue were observed under the microscope. 【Results】 After 5 hours of treatment, the PaO2/FiO2 of blank group was 481.85±35.31, and that of ARDS group was 183.67±20.18, which was significantly lower than that of blank group (P<0.01). The ARDS HOT group was 271.90±21.35, which was significantly higher than the ARDS group (P<0.01). The inflammatory factor IL-6 was (206.49±38.85) pg/mL in the blank group, and (293.12±30.38) pg/mL in the ARDS group, which was significantly higher than that in the blank group (P<0.01). There was a significant difference between the ARDS HOT group and ARDS group (221.56±46.69) pg/mL (P<0.01). The results of inflammatory factor IL-8 detection showed that the IL-8 in ARDS group was increased compared with the blank group (P<0.01); and the IL-8 in ARDS HOT group was decreased compared with ARDS group (P<0.01). Myeloperoxidase MPO test results showed that the blank group was (505.58±73.94) pg/mL, and the ARDS group was (605.69±108.88) pg/mL, which was significantly higher than the blank group (P<0.05). The ARDS HOT group was (476.52±103.85) pg/mL, which was significantly lower than the ARDS group (P<0.05). Microscopic examination of lung pathology showed that the lung tissue injury in ARDS HOT group was significantly reduced compared with ARDS group. 【Conclusion】 HOT can reduce the inflammation and injury of lung in ARDS model dogs through significantly increasing the PaO2/FiO2, down-regulating the expression of MPO, then inhibiting the activity of neutrophils and reducing the levels of IL-6 and IL-8.

Effect of histone H4 on polarization of alveolar macrophages in mice with acute respiratory distress syndrome / 中国职业医学

Objective To investigate the role of histone H4 in the polarization of alveolar macrophages (AM) in lipopolysaccharide (LPS)-induced acute respiratory distress syndrome (ARDS) in mice. Methods i) The specific pathogen free male C57BL/6 mice were randomly divided into control group and 2, 4, 6 and 8 mg/kg LPS groups, with six mice in each group. The mice in the LPS groups were intratracheally administered LPS according to their respective doses, while the mice in the control group received an equivalent volume of 0.9% saline. After 12 hours, the arterial blood gas was analyzed, and the pulmonary edema and histopathological changes in lung tissues of mice in each group were observed. The level of histone H4 in bronchoalveolar lavage fluid (BALF) of mice was detected using enzyme-linked immunosorbent assay , and mice AMs of the five group were isolated using adherent method. ii) AMs from normal mice were isolated using adherent method and randomly divided into control group, histone H4 injury group, BALF injury group and anti-histone H4 antibody (anti-H4) intervention group. In the histone H4 injury group, AMs were treated with histone H4 at a final concentration of 20 mg/L. In the BALF injury group and anti-H4 intervention group, AMs were treated with 200 μL BALF supernatant from mice intratracheally administered 6 mg/kg body weight LPS, with the latter group treated with 25 mg/L anti-H4 antibody. The control group AMs were treated with phosphate-buffered saline. iii) After 12 hours of stimulation, the cells were collected, and the relative expression of tumor necrosis factor-α (Tnfa), interleukin-1β (Il1b), differentiation antigen 206 (Cd206) and arginase 1 (Arg1) in AMs was detected using real-time quantitative polymerase chain reaction. Results i) Compared with the control group, mice in all four LPS groups exhibited rapid breathing, inflammatory reaction and lung edema in lung tissues, which were aggravated in a dose-dependent manner. The ratio of partial pressure of arterial oxygen to fraction of inspired oxygen in mice decreased with the increase of LPS dose (P<0.05). The wet/dry weight ratio of lung, the level of histone H4 in BALF and the relative expression of Tnfa and Il1b mRNA in AMs increased with the increase of LPS dose (all P<0.05). The mice in the 6 and 8 mg/kg LPS groups developed ARDS. The level of histone H4 in BALF and the relative expression of Tnfa and Il1b mRNA in AMs of mice in 6 and 8 mg/kg LPS groups were higher than those in the other three groups (all P<0.05). ii) The relative expression of Tnfa and Il1b mRNA increased (both P<0.05), and the relative expression of Cd206 and Arg1 mRNA decreased (both P<0.05) in AMs of histone H4 injury group and BALF injury group compared with the control group. Compared with BALF injury group, the relative mRNA expression of Tnfa and Il1b in AMs of anti-H4 intervention group decreased (both P<0.05), while the relative expression of Arg1 mRNA increased (P<0.05). Conclusion LPS can induce a dose-dependent increase in histone H4 levels in BALF in mice. Histone H4 drives the development of ARDS by activating AMs to M1 polarization. Antagonizing histone H4 to interfere with AM polarization to M1 could be a target for the treatment of ARDS.

Research progress on acute lung injury/acute respiratory distress syndrome after liver transplantation / 器官移植

Acute lung injury/acute respiratory distress syndrome (ALI/ARDS) is a common complication after liver transplantation, which could prolong the length of postoperative intensive care unit stay, affect clinical efficacy of liver transplantation and even lead to the death of recipients. ALI/ARDS has attracted extensive attention from liver transplant surgeons in clinical practice. ALI/ARDS after liver transplantation may be directly caused by pulmonary factors (such as mechanical ventilation-related lung injury, lung infection and aspiration, etc.) or indirectly induced by non-pulmonary factors (such as severe infection outside the lungs, blood transfusion and ischemia-reperfusion injury, etc.). In this article, the diagnostic criteria, incidence, mechanism, risk factors, laboratory and clinical diagnostic approaches and treatment of ALI/ARDS after liver transplantation were reviewed, aiming to deepen the understanding and cognition of ALI/ARDS during the perioperative period of liver transplantation and provide reference for the diagnosis and treatment of ALI/ARDS following liver transplantation.

Research progress of mechanical power in ventilator-induced lung injury / 国际生物医学工程杂志

ICU acute respiratory distress syndrome has a high morbidity and mortality rate, and these patients usually need mechanical ventilation to maintain their respiratory function during treatment. However, improper setting of mechanical ventilation parameters may lead to ventilator-induced lung injury (VILI). In order to effectively prevent the occurrence of VILI, ARDSnet recommends the use of a protective ventilation strategy with low tidal volume and limited airway plateau pressure. However, from the perspective of ventilator energy transfer, VILI is actually the result of a combination of respiratory parameters such as tidal volume, airway pressure, and respiratory rate. The mechanical power well reflects the combined effect of the above parameters and is increasingly becoming a hot topic in clinical research. In this review paper, the definitions of mechanical energy and mechanical power were introduced, and the calculation methods of mechanical power under different respiratory modes are summarized. Moreover, the clinical studies related to mechanical power and VILI and further exploration of the safety threshold of mechanical power are reviewed. It is expected to provide new ideas for the future clinical development of personalized mechanical ventilation strategies and the effective prevention of VILI.

Advances in the fluid management strategies of pediatric acute respiratory distress syndrome / 国际儿科学杂志

Pediatric acute respiratory distress syndrome(PARDS)is a pulmonary inflammation syndrome caused by a variety of proinflammatory factors induced by many causes, which is mainly characterized by noncardiogenic pulmonary edema.The main pathophysiological feature is the destruction of the integrity of the alveolar capillary membrane, and the loss of the alveolar epithelial-endothelial barrier function.In the PARDS′s clinical practice, the mainstay of the treatment is supportive.Although there is still no clear definition and general consensus or guidelines, appropriate liquid therapy is an important part of non-ventilatory treatment measures.Proper fluid management strategy is helpful to improve pulmonary edema, maintain normal circulatory perfusion, prevent functional failure of important organs and improve the prognosis of patients.According to volume status, implementing the goal-oriented and phased differentiated fluid management strategy is significant for the therapy of PARDS patients.However, the effects of fluid strategy management according to PARDS phenotypes remain to be evaluated.

Progress of unfolded protein response in acute respiratory distress syndrome / 国际儿科学杂志

Acute respiratory distress syndrome(ARDS)is a severe respiratory disease in children and the pathogenesis is not fully defined.It is mainly related to various mechanisms of lung injury such as inflammation and autophagy.In recent years, studies have found that, endoplasmic reticulum stress(ERS)can aggravate lung injury in ARDS, in which protein homeostasis imbalance can induce activation of the unfolded protein response(UPR).The UPR reconstructs homeostasis by mediating transmembrane protein-related signaling pathways, while continuous excessive ERS will promote apoptosis and autophagy.This review summarizes the progress of the signaling pathway of UPR related to lung injury and its inflammatory effect in ARDS.

Progress on the mechanisms of low molecular weight heparin in treating acute respiratory distress syndrome caused by viral pneumonia / 国际儿科学杂志

Acute respiratory distress syndrome(ARDS) is an important pathological process in patients with severe viral pneumonia.The coagulation disorder is one of the important characteristics of patients with viral pneumonia.In recent years, more and more studies have been exploring the related mechanisms of ARDS caused by viral pneumonia.Although the application of low molecular weight heparin(LMWH) to prevent and treat thrombotic complications in patients with viral pneumonia has become an industry consensus, in addition to anticoagulation, LMWH also has multiple effects such as anti-inflammatory and antioxidant.Therefore, the therapeutic effect of LMWH on ARDS remains to be fully explored.This article focuses on the pathological and clinical characteristics of viral pneumonia, to explore the evidence and clinical mechanisms of LMWH in the treatment of ARDS.

Evaluating the effect of montelukast tablets on respiratory complications in patients following blunt chest wall trauma: A double-blind, randomized clinical trial / 中华创伤杂志(英文版)

PURPOSE@#Patients with multiple traumas are at high risk of developing respiratory complications, including pneumonia and acute respiratory distress syndrome. Many pulmonary complications are associated with systemic inflammation and pulmonary neutrophilic infiltration. Leukotriene-receptor antagonists are anti-inflammatory and anti-oxidant drugs subsiding airway inflammation. The present study investigates the effectiveness of montelukast in reducing pulmonary complications among trauma patients.@*METHODS@#This randomized, double-blind, placebo-control trial was conducted in patients with multiple blunt traumas and evidence of lung contusion detected via CT scan. We excluded patients if they met at least one of the following conditions: < 16 years old, history of cardiopulmonary diseases or positive history of montelukast-induced hypersensitivity reactions. Patients were allocated to the treatment (10 mg of montelukast) or placebo group using permuted block randomization method. The primary measured outcome was the volume of pulmonary contusion at the end of the trial. The secondary outcomes were intensive care unit and hospital length of stay, ventilation days, multi-organ failure, and the in-hospital mortality rate.@*RESULTS@#In total, 65 eligible patients (treatment = 31, placebo = 34) were included for the final analysis. The treatment group had more pulmonary contusion volume (mean (SD), mm3) at the right (68726.97 (93656.54) vs. 59730.27 (76551.74)) and the left side (67501.71 (91514.04) vs. 46502.21 (80604.21)), higher initial C-reactive peptide level (12.16 (10.58) vs. 10.85 (17.87)) compared to the placebo group, but the differences were not statistically significant (p > 0.05). At the end of the study, the mean (SD) of pulmonary contusion volume (mm3) (right side = 116748.74 (361705.12), left side = 64522.03 (117266.17)) of the treatment group were comparable to that of the placebo group (right side = 40051.26 (64081.56), left side = 25929.12 (47417.13), p = 0.228 and 0.082, respectively). Moreover, both groups have statistically similar hospital (mean (SD), days) (10.87 (9.83) vs. 13.05 (10.12)) and intensive care unit length of stays (mean (SD), days) (7.16 (8.15) vs. 7.82 (7.48)). Of note, the frequency of the in-hospital complications (treatment vs. control group) including acute respiratory distress syndrome (12.9% vs. 8.8%, p = 0.71), pneumonia (19.4% vs. 17.6%, p = 0.85), multi-organ failure (12.9% vs. 17.6%, p = 0.58) and the mortality rate (22.6% vs. 14.7%, p = 0.41) were comparable between the groups.@*CONCLUSION@#Administrating montelukast has no preventive or therapeutic effects on lung contusion or its complications.

Levels of neutrophil extracellular traps in neonates with acute respiratory distress syndrome / 中国当代儿科杂志

OBJECTIVES@#To study the changes in cell free-DNA (cf-DNA), a marker of neutrophil extracellular traps (NETs), in neonates with acute respiratory distress syndrome (ARDS), and to evaluate its relationship with the severity and early diagnosis of ARDS.@*METHODS@#The neonates diagnosed with ARDS in the Affiliated Hospital of Jiangsu University from January 2021 to June 2022 were enrolled in the prospective study. The neonates were divided into mild, moderate, and severe ARDS groups based on the oxygen index (OI) (4≤OI<8, 8≤OI<16, and OI≥16, respectively). The control group was selected from jaundice neonates who were observed in the neonatal department of the hospital during the same period, and they had no pathological factors causing neonatal jaundice. Peripheral blood samples were collected on day 1, day 3, and day 7 after admission for the ARDS group, and on the day of admission for the control group. Serum cf-DNA levels were measured using a fluorescence enzyme-linked immunosorbent assay. Serum interleukin-6 (IL-6) and tumor necrosis factor-α (TNF-α) levels were measured using enzyme-linked immunosorbent assay. A Pearson correlation analysis was used to evaluate the correlation of serum cf-DNA levels with serum IL-6 and TNF-α levels.@*RESULTS@#A total of 50 neonates were enrolled in the ARDS group, including 15 neonates with mild ARDS, 25 with moderate ARDS, and 10 with severe ARDS. Twenty-five neonates were enrolled in the control group. Compared with the control group, the serum levels of cf-DNA, IL-6, and TNF-α in all ARDS groups were significantly increased (P<0.05). Compared with the mild ARDS group, the serum levels of cf-DNA, IL-6, and TNF-α in the moderate and severe ARDS groups were significantly increased (P<0.05), and the increase was more significant in the severe ARDS group (P<0.05). The serum levels of cf-DNA, IL-6, and TNF-α in all ARDS groups were significantly increased on day 3 after admission and significantly decreased on day 7 after admission compared with those on day 1 after admission (P<0.05). The Pearson correlation analysis showed that there was a positive correlation between serum cf-DNA levels and IL-6 levels as well as TNF-α levels in 50 neonates with ARDS (P<0.05).@*CONCLUSIONS@#There is an excessive expression of NETs in neonates with ARDS, and dynamic monitoring of serum cf-DNA levels has certain clinical value in evaluating the severity and early diagnosis of ARDS in neonates.