Respiratory mechanics behavior after heart surgery: an experimental study

Changes in ventilatorymechanics and their consequent pulmonary complications are common after surgical procedures, particularly in cardiac surgery (CS), and may be associated with both preoperative history and surgical circumstances. This study aims to compare ventilatory mechanics in the moments before and after cardiac surgery (CS), describing how pulmonary complications occurred. An experimental, uncontrolled study was conducted, of the before-and-after type, and with a descriptive and analytical character. It was carried out in a private hospital in the city of Salvador, Bahia, Brazil, and involved 30 adult patients subjected to CS. In addition to clinical and epidemiological variables, minute volume (VE), respiratory rate (RR), tidal volume (VT), forced vital capacity (FVC), maximum inspiratory pressure (MIP), and peak expiratory flow (PEF) were also recorded. Data were collected in the following moments: preoperative (PRE-OP) period, immediate postoperative (IPO) period, and 1stpostoperative day (1stPOD). The sample was aged 48.1 ± 11.8 years old and had a body mass index of 25.5 ± 4.9 kg m-2; 60% of the patients remained on mechanical ventilation for less than 24 hours (17.5 [8.7-22.9] hours). There was a significant reduction in VT, FVC, MIP and PEF when PRE-OP versus IPO, and PRE-OP versus 1stPOD were compared (p < 0.05). There were no significant changes between IPO and the 1stPOD. The highest incidence of pulmonary complications involved pleural effusion (50% of the patients). This study showed that patients subjected to CS present significant damage to ventilatory parameters after the surgery, especially in the IPO period and on the 1stPOD. It is possible that the extension of this ventilatory impairment has led to the onset of postoperative pulmonary complications.

Adverse events related to mechanical ventilation in a pediatric intensive care unit / Eventos adversos relacionados à ventilação mecânica em uma unidade de terapia intensiva pediátrica

ABSTRACT Objective: To identify the prevalence and factors associated with adverse events (AE) related to invasive mechanical ventilation in patients admitted to the Pediatric Intensive Care Unit (PICU) of a tertiary public hospital. Methods: This is a cross-sectional study from July 2016 to June 2018, with data collected throughout patients' routine care in the unit by the care team. Demographic, clinical and ventilatory characteristics and adverse events were analysed. The logistic regression model was used for multivariate analysis regarding the factors associated with AE. Results: Three hundred and six patients were included, with a total ventilation time of 2,155 days. Adverse events occurred in 66 patients (21.6%), and in 11 of those (16.7%) two AE occurred, totalling 77 events (36 AE per 1000 days of ventilation). The most common AE was post-extubation stridor (25.9%), followed by unplanned extubation (16.9%). Episodes occurred predominantly in the afternoon shift (49.3%) and associated with mild damage (54.6%). Multivariate analysis showed a higher occurrence of AE associated with length of stay of 7 days or more (Odds Ratio [OR]=2.6; 95% confidence interval [95%CI] 1.49-4.66; p=0.001). Conclusions: The results of the present study show a significant number of preventable adverse events, especially stridor after extubation and accidental extubation. The higher frequency of these events is associated with longer hospitalization.

RESUMO Objetivo: Identificar a prevalência e os fatores associados a eventos adversos (EA) relacionados à ventilação mecânica (VM) invasiva em pacientes internados na Unidade de Terapia Intensiva Pediátrica (UTIP) de hospital público terciário. Métodos: Trata-se de estudo transversal realizado entre julho de 2016 e junho de 2018, com dados coletados ao longo da rotina de atendimento dos pacientes na unidade pela equipe assistencial. Neste estudo, foram analisados características demográficas, clínicas, ventilatórias e os EA ocorridos. O modelo de regressão logística foi utilizado para análise multivariada quanto aos fatores associados aos EA. Resultados: Neste estudo, foram incluídos 306 pacientes, com tempo de ventilação total de 2.155 dias. Ocorreram EA em 66 pacientes (21,6%), dos quais 11 (16,7%) sofreram dois EA, totalizando 77 eventos (36 EA por mil dias de ventilação). O EA mais comum foi o estridor pós-extubação (25,9%), seguido da extubação não planejada (16,9%). Os episódios ocorreram predominantemente no turno da tarde (49,3%) e associados a grau de dano leve (54,6%). Na análise multivariada, observou-se maior ocorrência de EA associado a tempo de internação igual ou superior a sete dias (Odds Ratio [OR]=2,6, intervalo de confiança de 95% [IC95%)]1,49-4,66, p=0,001). Conclusões: Evidenciou-se número significativo de EA que podem ser prevenidos, destacando-se o estridor pós-extubação e a extubação acidental, com ocorrência mais frequentemente associada ao maior tempo de internação.

Síndrome de dificultad respiratoria aguda en niños: duración de la ventilación y supervivencia / Acute respiratory distress syndrome in children: duration of ventilation and survival

Introducción: El síndrome de dificultad respiratoria aguda es una enfermedad que cursa con hipoxemia severa, poco frecuente en las unidades de cuidados intensivos pediátricos, pero con elevada mortalidad. Objetivo: Determinar la relación entre variables demográficas y clínicas con la duración de la ventilación mecánica y la supervivencia en niños con síndrome de dificultad respiratoria aguda. Métodos: Estudio retrospectivo de los pacientes ingresados en 15 unidades de cuidados intensivos pediátricos, con diagnóstico de síndrome de dificultad respiratoria aguda. Se evaluaron variables demográficas, las formas clínicas del síndrome de dificultad respiratoria aguda, duración de la ventilación mecánica y la supervivencia. Las variables cualitativas se expresaron en valores absolutos y porcentajes, las variables cuantitativas se analizaron con la prueba ji-cuadrada de Pearson y comparación de medias. Resultados: Se registraron 282 pacientes, de ellos 63,7 por ciento menores de seis años, el 54,4 por ciento del sexo masculino y el 51,1 por ciento de piel blanca. Las formas clínicas pulmonares prevalecieron (58,1 por ciento) y se correlacionaron (p= 0,022) con la supervivencia, la mediana de la duración de la ventilación mecánica fue de 10 días. Existió relación (p= 0,000) entre la duración de la ventilación y la mortalidad. Se registró una mortalidad global de 40,78 por ciento, (n= 115). Conclusiones: El síndrome de dificultad respiratoria aguda tiene mayor incidencia en los menores de seis años y en las formas clínicas pulmonares que se relacionan con una mayor supervivencia, la cual se eleva en la medida que aumentan los días de ventilación mecánica(AU)

ABSTRACT Introduction: The acute respiratory distress syndrome is a disease that evolves with severe hypoxemia, and it is not frequent in pediatric intensive care units, but it has high mortality rates. Objective: To determine the relation between demographic and clinical variables with the mechanical ventilation and survival in children with acute respiratory distress syndrome. Methods: Retrospective study in patients admitted in 15 pediatric intensive care units with diagnosis of acute respiratory distress syndrome. There was an assessment of the demographic variables, the clinical forms of this syndrome, the duration of mechanical ventilation and the survival rates. Qualitative variables were presented in absolute values and percentages, and were analyzed with the Pearson´s ji-square test and means comparison. Results: 282 patients were recorded, 63.7 percent of them were under 6 years old, 54.4 percent were males and 51.1 percent were white. Pulmonary clinical forms prevailed (58,1 percent) and were correlated (p= 0,022) with the survival rates, and the mean of mechanical ventilation´s duration was of 10 days. There was relation (p= 0,000) between the duration of ventilation and mortality. It was recorded a total mortality of 40.78 percent (n= 115). Conclusions: Acute respiratory distress syndrome has higher incidence in children under 6 years and in the pulmonary clinical forms that are related with a higher survival, which increases in the same way that mechanical ventilation´s amount of days do(AU)

Daño renal agudo en pacientes con ventilación mecánica invasiva, Guantánamo 2018-2019 / Acute kidney injury in patients with invasive mechanical ventilation in Guantanamo, 2018-2019

RESUMEN Introducción: El daño renal agudo es una complicación frecuente en las Unidades de Terapia Intensiva, sobre todo en pacientes con ventilación mecánica. Objetivo: Caracterizar el daño renal agudo en los pacientes tratados con ventilación mecánica invasiva en la Unidad de Terapia Intensiva del Hospital General Docente "Dr. Agostinho Neto" durante el periodo 2108-2019. Método: Se realizó un estudio descriptivo, retrospectivo y longitudinal, que se aprobó por el Comité de Ética. El universo de estudio se constituyó por el total de pacientes con este diagnóstico según la clasificación Acute Kidney Injury Network (AKIN). Se estudiaron las características de los pacientes (necesidad y duración de la VAM, necesidad de hemodiálisis, estado al egreso) y del daño renal agudo (estadio y etiología). Resultados: El 47,5 % de los pacientes tratados con este soporte vital presentó un daño renal agudo, sobre todo los que la demandaron por siete o más días (68,4 %). El riesgo de muerte fue superior en los pacientes que requirieron ventilación mecánica o hemodiálisis. En los pacientes con daño renal estadio 2 y 3 de la clasificación que se utilizó presentaron un riesgo tres veces o más superior comparado con los que no necesitaron estas terapias. La sepsis (69,4 %) fue la principal causa del daño renal agudo. Conclusiones: El uso de ventilación mecánica invasiva y la presentación de un daño renal agudo son condiciones con una fuerte asociación, juntas y separadas se correlacionan con la mortalidad.

ABSTRACT Introduction: Acute kidney injury is a very common complication in the intensive care units, especially in patients with invasive mechanical ventilation. Objective: To characterize acute kidney damage in patients with invasive mechanical ventilation in the intensive care unit at the General Teaching Hospital ¨Dr. Agostinho Neto¨ within the period 2018-2019. Method: A descriptive, retrospective and longitudinal study approved by the Ethics Committee was carried out. The study population was constituted by the total of patients with the diagnosis, according to the Acute Kidney Injury Network (AKIN). Characteristics and variables like: reason for the invasive mechanical ventilation, its duration, hemodialysis, and status of the patient at time of discharge were taken into account, along with the characteristics of the kidney injury (stages and etiology). Results: 47.5 % of the patients treated with life support showed acute kidney injury, especially the ones with more than a week of mechanical ventilation (68.4 %). The risk of death was higher in the patients with mechanical ventilation and hemodialysis. In the patients with stage 2 and 3 of the scale used for kidney injury presented 3 times more risk compared to those who did not require these treatments. Sepsis was the main cause of acute kidney injury (69.4 %). Conclusions: the use of invasive mechanical ventilation and acute kidney injury are deeply related to each other, both of them constitute main issues in the variables of mortality.

Risk factors and mortality in patients with sepsis, septic and non septic acute kidney injury in ICU / Fatores de risco e mortalidade dos pacientes com sepse, lesão renal aguda séptica e não séptica na UTI

Abstract Acute kidney injury (AKI) has an incidence rate of 5-6% among intensive care unit (ICU) patients and sepsis is the most frequent etiology. Aims: To assess patients in the ICU that developed AKI, AKI on chronic kidney disease (CKD), and/or sepsis, and identify the risk factors and outcomes of these diseases. Methods: A prospective observational cohort quantitative study that included patients who stayed in the ICU > 48 hours and had not been on dialysis previously was carried out. Results: 302 patients were included and divided into: no sepsis and no AKI (nsnAKI), sepsis alone (S), septic AKI (sAKI), non-septic AKI (nsAKI), septic AKI on CKD (sAKI/CKD), and non-septic AKI on CKD (nsAKI/CKD). It was observed that 94% of the patients developed some degree of AKI. Kidney Disease Improving Global Outcomes (KDIGO) stage 3 was predominant in the septic groups (p = 0.018). Nephrologist follow-up in the non-septic patients was only 23% vs. 54% in the septic groups (p < 0.001). Dialysis was performed in 8% of the non-septic and 37% of the septic groups (p < 0.001). Mechanical ventilation (MV) requirement was higher in the septic groups (p < 0.001). Mortality was 38 and 39% in the sAKI and sAKI/CKD groups vs 16% and 0% in the nsAKI and nsAKI/CKD groups, respectively (p < 0.001). Conclusions: Patients with sAKI and sAKI/CKD had worse prognosis than those with nsAKI and nsAKI/CKD. The nephrologist was not contacted in a large number of AKI cases, except for KDIGO stage 3, which directly influenced mortality rates. The urine output was considerably impaired, ICU stay was longer, use of MV and mortality were higher when kidney injury was combined with sepsis.

Resumo A Lesão Renal Aguda (LRA), cuja etiologia mais frequente é sepse, tem incidência de 5-6% na Unidade de Terapia Intensiva (UTI). Objetivo: Avaliar pacientes que permaneceram mais de 48 horas na UTI e desenvolveram LRA ou Doença Renal Crônica agudizada (DRCag) e/ou sepse; identificar fatores associados e causas que possam afetar a evolução desses pacientes. Método: Estudo prospectivo, observacional, coorte e quantitativo dos pacientes em UTI entre maio a dezembro de 2013 com sepse e LRA. Excluídos pacientes < 48 horas e/ou dialíticos prévios. Resultados: Dos 1156 pacientes admitidos, 302 foram incluídos e divididos em grupos: sem sepse e sem LRA (SSSLRA), apenas sepse (S), LRA séptica (LRAs), LRA não séptica (LRAns), DRCag séptica (DRCags), DRCag não séptica (DRCagns). Foi verificado que 94% apresentaram algum grau de lesão renal; Kidney Disease Improving Global Outcomes (KDIGO) 3 foi predominante nos grupos sépticos (p = 0.018); o nefrologista foi chamado apenas em 23% dos pacientes não sépticos vs. 54% dos sépticos (p < 0.001); houve necessidade de diálise em 8% dos não sépticos vs. 37% dos sépticos (p < 0.001); necessidade de Ventilação Mecânica (VM) em 61% da LRAns versus 90% na LRAs (p < 0.001). A mortalidade foi 38% e 39% na LRAs e DRCags vs. 16% e 0% na LRAns e DRCagns, respectivamente (p < 0.001). Conclusão: LRAs e DRCags têm pior prognóstico que a não séptica. O nefrologista ainda não é solicitado em grande parte dos casos com influência direta na mortalidade (p < 0.001), o débito urinário é consideravelmente prejudicado; o tempo de permanência na UTI, necessidade de VM e mortalidade são maiores quando há associação da sepse e LRA.

Fluid balance in pediatric patients in prone position: a pragmatic study

SUMMARY OBJECTIVE: To verify the association between prone position, increased diuresis, and decreased cumulative fluid balance in critically ill pediatric patients who underwent mechanical ventilation (MV) for pulmonary causes and describe adverse events related to the use of the position. METHODS: This is a retrospective observational study. Patients aged between 1 month and 12 years who underwent MV for pulmonary causes, between January 2013 and December 2015, were selected and divided between those who were put on prone position (PG) and those who were not (CG) during the hospitalization at the Pediatric Intensive Care Unit (PICU). Data were analyzed longitudinally from D1 to D4. RESULTS: A total of 77 patients (PG = 37 and CG = 40) were analyzed. The general characteristics of both groups were similar. In the comparison between the groups, there was no increase in diuresis or decrease in cumulative fluid balance in the prone group. In the longitudinal analysis of D1 to D4, we saw that the PG presented higher diuresis (p = 0.034) and a lower cumulative fluid balance (p = 0.001) in D2. Regarding the use of diuretics, there was greater use of furosemide (P <0.001) and spironolactone (P = 0.04) in the PG. There was no increase in adverse events during the use of the prone position. CONCLUSION: The prone position was not associated with increased diuresis or decreased cumulative fluid balance in critically ill pediatric patients who underwent to MV for pulmonary causes.

RESUMO OBJETIVO: Verificar a associação entre posição prona, aumento da diurese e diminuição do balanço hídrico em pacientes pediátricos criticamente enfermos e submetidos à ventilação mecânica (VM) por causa pulmonar, além de descrever eventuais intercorrências relacionadas à aplicação dessa posição. MÉTODOS: Estudo observacional retrospectivo. Pacientes submetidos à VM por causa pulmonar, com idade entre 1 mês e 12 anos no período entre janeiro de 2013 e dezembro de 2015, foram selecionados e divididos entre os que receberam posição prona (GP) e os que não receberam (GC) durante a internação na Unidade de Terapia Intensiva Pediátrica (Utip). Os dados foram analisados longitudinalmente de D1 a D4. RESULTADOS: Foram analisados77 pacientes (GP=37 e GC=40). Em termos de características gerais, os grupos foram semelhantes entre si. Na comparação entre os grupos, não houve aumento da diurese ou diminuição do balanço hídrico cumulativo no grupo prona. Na análise longitudinal de D1 a D4, evidenciou-se que o GP apresentou maior diurese (p=0,034) e menor balanço hídrico cumulativo (p = 0,001) no D2. Com relação ao uso de diuréticos, houve maior uso de furosemida (P<0,001) e de espironolactona (P=0,04) no GP. Não houve aumento de eventos adversos durante a utilização da posição prona. CONCLUSÃO: A posição prona não demonstrou associação com aumento da diurese ou diminuição de balanço hídrico cumulativo em pacientes críticos pediátricos submetidos à VM por causa pulmonar.

Risk factors and outcome of acute kidney injury after isolated cabg surgery: a prospective cohort study

Abstract Background: Acute kidney injury (AKI) is a frequent event after cardiac surgery with increased mortality and morbidity. We explored frequency, risk factors, and associated morbidity and mortality of AKI after isolated coronary artery bypass grafting (CABG) surgery at a single institution. Methods: All consecutive adults undergoing CABG surgery from March 2013 to October 2016 were assessed for development and severity of AKI based on Acute Kidney Injury Network (AKIN) criteria. The patients were also investigated regarding their need for renal replacement therapy (RRT), predictive risk factors, and associated outcomes, including duration of mechanical ventilation, mortality, intensive care unit (ICU) and hospital length of stay. Results: Of 1737 patients in the study, 275 (15.8%) developed AKI. Twenty-five (12.8%) cases required RRT. Patients with AKI had longer ventilation time, ICU and hospital length of stay (P<0.001). Mortality rates were 28 (10.2%) and 22 (1.5%) in patients with and without AKI, respectively (P<0.001). There was a strong association between advanced age (aOR=1.016, 95% CI=1.002-1.030, P=0.028), diabetes (aOR=1.36, 95% CI=1.022-1.809, P=0.035), on-pump surgery (aOR=2.63, 95% CI=1.543-4.483, P<0.001), transfusion of more than 1 unit of red blood cells (aOR=2.154, 95% CI=1.237-3.753, P=0.007), and prolonged mechanical ventilation and development of AKI (aOR=2.697, 95% CI=1.02407.071, P<0.001). AKI was seen less frequently in those with opium abuse (aOR=0.613, 95% CI=0.409-0.921, P=0.018). Conclusion: We demonstrated that advanced age, diabetes, on-pump surgery, red blood cell transfusion, and prolonged mechanical ventilation were independent positive risk factors for the development of AKI after isolated CABG while opium abuse was a protective factor.

Mortalidad en pacientes con ventilación mecánica ingresados en una Unidad de Cuidados Intensivos / Mortality in mechanically ventilated patients admitted to an Intensive Care Unit

Introducción: La ventilación mecánica es un proceder para la sustitución de la ventilación, que salva la vida de pacientes con insuficiencia respiratoria aguda, al mismo tiempo es una de las primeras causas de complicaciones y de mortalidad. Objetivo: Identificar las características clínico-epidemiológicas en pacientes fallecidos con ventilación mecánica, ingresados en la UCI del hospital Joaquín Albarrán Domínguez en el trienio 2013-2015. Material y Métodos: Se realizó un estudio descriptivo, transversal, con las historias clínicas de dichos pacientes, recopilando la información en una matriz de datos y posteriormente fue analizada con el software SPSS 21.0, a través de frecuencias absolutas y relativas y con la utilización de la prueba de chi2 para las correlaciones bi-variadas, tomando como valor de significación estadística p< 0,05. Resultados: De los 166 pacientes, el 49,4 por ciento superaba los 70 años. La EPOC fue el motivo de ventilación más frecuente. Las mayores complicaciones de la ventilación fueron: fallo multiorgánico 25,3 por ciento, fallo al destete 21,6 por ciento, y distrés respiratorio 20,4 por ciento. Conclusiones: El fallo multiorgánico, las bronconeumonías bacterianas bilaterales y la neumonía asociada a la ventilación mecánica, fueron las principales complicaciones y causas de muerte más frecuentes en los pacientes ventilados(AU)

Introduction: Mechanical ventilation is a procedure used for the replacement of ventilation, which saves the life of patients with acute respiratory failure; but at the same time, it is one of the first causes of complications and mortality. Objective: To identify the clinical and epidemiological characteristics of patients who died while receiving mechanical ventilation, admitted to the Intensive Care Unit (ICU) of the Joaquín Albarrán Dominguez Clinical Surgical Hospital during the triennium 2013-2015. Material and methods: A descriptive, cross-sectional study was carried out with the clinical histories of these patients. The information was collected in a data matrix that was subsequently analyzed with the SPSS 21.0 software, on the basis of absolute and relative frequencies and the use of the chi2 test for the bi-varied correlations; the statistical significance value was p <0.05. Results: Of the 166 patients selected for the study, the 49.4 percent were over 70 years of age. COPD was the most frequent reason for ventilation. The main complications of ventilation were: multiple organ failure (25.3 percent), weaning failure (21.6 percent), and respiratory distress (20.4 percent). Conclusions: Multiple organ failure, bilateral bacterial bronchopneumonia, and pneumonia associated with mechanical ventilation were the most frequent complications and causes of death in ventilated patients(AU)

Predictors of mortality among intensive care unit patients coinfected with tuberculosis and HIV / Preditores de mortalidade em pacientes da unidade de terapia intensiva coinfectados por tuberculose e HIV

ABSTRACT Objective: To identify factors predictive of mortality in patients admitted to the ICU with tuberculosis (TB)/HIV coinfection in the Manaus, Amazon Region. Methods: This was a retrospective cohort study of TB/HIV coinfected patients over 18 years of age who were admitted to an ICU in the city of Manaus, Brazil, between January of 2011 and December of 2014. Sociodemographic, clinical, and laboratory variables were assessed. To identify factors predictive of mortality, we employed a Cox proportional hazards model. Results: During the study period, 120 patients with TB/HIV coinfection were admitted to the ICU. The mean age was 37.0 ± 11.7 years. Of the 120 patients evaluated, 94 (78.3%) died and 62 (66.0%) of those deaths having occurred within the first week after admission. Data on invasive mechanical ventilation (IMV) and ARDS were available for 86 and 67 patients, respectively Of those 86, 75 (87.2%) underwent IMV, and, of those 67, 48 (71.6%) presented with ARDS. The factors found to be independently associated with mortality were IMV (p = 0.002), hypoalbuminemia (p = 0.013), and CD4 count < 200 cells/mm3 (p = 0.002). Conclusions: A high early mortality rate was observed among TB/HIV coinfected ICU patients. The factors predictive of mortality in this population were IMV, hypoalbuminemia, and severe immunosuppression.

RESUMO Objetivo: Identificar fatores preditores de mortalidade em pacientes da UTI coinfectados por tuberculose (TB)/HIV em Manaus (AM). Métodos: Estudo retrospectivo de coorte com pacientes coinfectados por TB/HIV, com mais de 18 anos de idade e admitidos na UTI entre janeiro de 2011 e dezembro de 2014. Foram avaliadas variáveis sociodemográficas, clínicas e laboratoriais. Para identificar fatores preditores de mortalidade, foi empregado um modelo de riscos proporcionais de Cox. Resultados: Durante o período estudado, 120 pacientes com coinfecção por TB/HIV foram admitidos na UTI. A média de idade foi de 37,0 ± 11,7 anos. Dos 120 pacientes avaliados, 94 (78,3%) morreram; dos 94 óbitos, 62 (66,0%) ocorreram na primeira semana após a admissão. Havia dados sobre ventilação mecânica invasiva (VMI) e SARA referentes a 86 e 67 pacientes, respectivamente. Dos 86, 75 (87,2%) foram submetidos a VMI, e, dos 67, 48 (71,6%) apresentaram SARA. Os fatores que se relacionaram independentemente com a mortalidade foram VMI (p = 0,002), hipoalbuminemia (p = 0,013) e contagem de CD4 < 200 células/mm3 (p = 0,002). Conclusões: Elevada mortalidade precoce foi observada em pacientes com coinfecção por TB/HIV admitidos na UTI. Os fatores preditores de mortalidade nessa população foram VMI, hipoalbuminemia e imunodepressão grave.

Preditores de mortalidade em pacientes ventilados mecanicamente: revisão integrativa / Predictors of mortality in mechanically ventilated patients: an integrative review / Predictores de mortalidad en pacientes ventilados mecánicamente: revisión integradora

OBJETIVO: Identificar, por meio de evidências científicas, os fatores preditores de mortalidade em pacientes em uso de Ventilação Mecânica Invasiva. MÉTODO: Revisão integrativa de literatura. A busca foi realizada nas bases de dados Pubmed, Cochrane e Web of Science, por meio da estratégia PICO, utilizando os descritores: "humans", "respiration, artificial", "mechanical ventilation", "ventilator weaning", "mechanical ventilator weaning", "mortality" e "hospital mortality", mediada pelos operadores booleanos AND e OR. RESULTADOS: Foram selecionados 26 artigos, cuja análise possibilitou uma discussão direcionada à identificação dos fatores preditores de mortalidade, classificados em preditores clínicos e ventilatórios; e as principais mudanças nas condutas ventilatórias ocorridas ao longo dos anos. Dos 26 artigos encontrados, 96% foram publicados em língua inglesa, 92% são estudos observacionais, 4% metanálises e 4% ensaios clínicos. CONCLUSÃO: O desmame prolongado, a falha de extubação e a reintubação foram os principais preditores identificados pelos estudos analisados.

AIM: To identify, by means of scientific evidence, the predictive factors of mortality in patients using Invasive Mechanical Ventilation. METHOD: Integrative literature review. The search was performed in Pubmed, Cochrane and Web of Science databases, using the descriptors: "humans", "respiration", "artificial", "mechanical ventilation", "ventilator weaning", "mechanical ventilator weaning", "Mortality" and "hospital mortality", mediated by the Boolean operators AND and OR. RESULTS: Twenty-six articles were selected. The analysis of these articles allowed a discussion directed to the identification of predictors of mortality, classified in clinical and ventilatory predictors; and the main changes in ventilation during the years. Of the 26 articles found, 96% were published in English, 92% were observational studies, 4% were meta-analyzes and 4% were clinical trials. CONCLUSION: Prolonged weaning, extubation failure and reintubation were the main predictors identified by the studies analyzed.

OBJETIVO: Identificar, por medio de evidencias científicas, los factores predictores de mortalidad en pacientes en uso de Ventilación Mecánica Invasora. MÉTODO: Revisión integradora de literatura. La búsqueda fue realizada en las bases de datos Pubmed, Cochrane y Web of Science, por medio de la estrategia PICO, utilizando los descrictores: "humans", "respiration, artificial", "mechanical ventilation", "ventilator weaning", "mechanical ventilator weaning", "mortality" e "hospital mortality", mediada por los operadores booleanos AND y OR. RESULTADOS: Fueron seleccionados 26 artículos, cuyo análisis posibilitó una discusión direccionada a la identificación de los factores predictores de mortalidad, clasificados en predictores clínicos y ventilatoria; y los principales cambios en las conductas ventilatorias ocurridas a lo largo de los años. De los 26 artículos encontrados, 96% fueron publicados en lengua inglesa, 92% son estudios observacionales, 4% metaanálisis y 4% ensayos clínicos. CONCLUSIÓN: El desmame prolongado, la falla de extubación y la Re intubación fueron los principales predictores identificados por los estudios analizados.

Morbilidad y mortalidad en pacientes con ventilación mecánica invasiva en la Unidad de Cuidados Intensivos del Hospital "Celia Sánchez Manduley" / Morbidity and mortality in patients with invasive mechanical ventilation in the Intensive Care Unit of "Celia Sánchez Manduley" Hospital

Se realizó un estudio descriptivo y retrospectivo de 43 pacientes con 18 años y más, quienes ingresaron en la Unidad de Cuidados Intensivos del Hospital Celia Sánchez Manduley de Manzanillo, provincia de Granma, puesto que necesitaron de ventilación mecánica invasiva por más de 12 horas, desde enero hasta diciembre del 2014, para determinar la morbilidad y mortalidad en los afectados. Predominaron el grupo etario de 60 años y más (44,1 por ciento), en el cual se encontraban 59,2 por ciento de los pacientes fallecidos, así como el sexo masculino (53,6 por ciento). Las enfermedades cerebrovasculares representaron 20,9 por ciento de los ingresos y 53,4 por ciento de los afectados recibieron ventilación artificial durante 3-21 días. La mortalidad en los expuestos a este proceder durante 12-72 horas, 3-21 días fue de 48,1 por ciento, en tanto, la general resultó ser de 64,7 por ciento y la observada, mayor que la predicha en la escala APACHE II, razón por la cual no constituyó herramienta de pronóstico

A descriptive and retrospective study of 43 patients with 18 years and over who were admitted to the Intensive Care Unit of Celia Sánchez Manduley Hospital in Manzanillo, Granma, was carried out from January to December, 2014 since they needed invasive mechanical ventilation for more than 12 hours, to determine morbidity and mortality in those affected patients. The 60 years and over age group (44.1 percent), in which there were the 59.2 percent of dead patients, as well as the male sex (53.6 percent) prevailed. The cerebrovascular diseases represented 20.9 percent of the admissions and 53.4 percent of those affected received artificial ventilation during 3-21 days. The mortality in those exposed to this procedure during 12-72 hours, 3-21 days was 48.1 percent, as long as, the general mortality was 64.7 percent and the one observed, higher than the predicted mortality in the APACHE scale II, reason why it didn't constitute a prognosis tool

Evolución de los pacientes graves con ventilación mecánica invasiva según el catabolismo proteico / Evolution of severe patients with invasive mechanical ventilation according to protein catabolism

Introducción: el catabolismo proteico es un indicador de la respuesta metabólica a la agresión. Objetivo: determinar la evolución de los pacientes con ventilación mecánica invasiva y su posible asociación con el catabolismo proteico, por categorías diagnósticas. Método: se realizó un estudio observacional, analítico y prospectivo, conto dos los pacientes sometidos a ventilación mecánica invasiva, ingresados en cuidados intensivos desde el 2001 hasta el 2007 y fueron clasificaron según la categoría diagnóstica (trauma, clínico y quirúrgico). Se midió el peso corporal al ingreso. Se evaluó el catabolismo proteico durante los primeros 3 días del ingreso, con la urea plasmática, la creatininuria y el nitrógeno ureico urinario. Se contrastaron con las variables dependientes: mortalidad, morbilidad y el tiempo de ventilación mecánica. Resultados: se estudiaron 262 pacientes; 88 presentaban trauma, 89 afecciones clínicas y 85 afecciones quirúrgicas. El catabolismo proteico fue alto en el trauma y se asoció a la mortalidad, a la disfunción múltiple de órganos y al tiempo prolongado de ventilación mecánica; en los pacientes quirúrgicos se asoció a la morbilidad. Los valores bajos de creatininuria, evidenciaron asociación con la mayor mortalidad, morbilidad y el tiempo prolongado de ventilación mecánica. Conclusiones: el catabolismo proteico se asoció a la evolución del paciente con ventilación mecánica invasiva, en las categorías trauma y quirúrgicos. No se evidenció asociación en la categoría clínica(AU)

Introduction: Protein catabolism is an indicator of the metabolic response to injury. Objective: To determine the evolution of patients with mechanical invasive ventilation and its possible association with protein catabolism by diagnostic category. Method: An observational, analytical and prospective study was performed with all patients undergoing mechanical invasive ventilation admitted to Intensive Care from 2001 to 2007 and classified according to the diagnostic category (trauma, clinical and surgical). Body weight was measured at admission. Protein catabolism was evaluated during the first 3 days of admission, with plasma urea, creatinine and urinary urea nitrogen. They were contrasted with the dependent variables: mortality, morbidity and time of mechanical ventilation. Results: We studied 262 patients; 88 presented trauma, 89 clinical conditions and 85 surgical conditions. Protein catabolism was high in trauma and associated with mortality, multiple organ dysfunction and prolonged mechanical ventilation; in surgical patients was associated with morbidity. The low values of urine creatinine,were associated with the greater mortality, morbidity and the prolonged time of mechanical ventilation. Conclusions: Protein catabolism was associated with the evolution of the patient with mechanical invasive ventilation, in the trauma and surgical categories. There was no evidence of association in the clinical category(AU)

Non-invasive mechanical ventilation after the successful weaning: a comparison with the venturi mask / Ventilação mecânica não invasiva após desmame bem-sucedido: uma comparação com a máscara de Venturi

Abstract Background and objectives: This study compared the rates of acute respiratory failure, reintubation, length of intensive care stay and mortality in patients in whom the non-invasive mechanical ventilation (NIMV) was applied instead of the routine venturi face mask (VM) application after a successful weaning. Methods: Following the approval of the hospital ethics committee, 62 patients who were under mechanical ventilation for at least 48 hours were scheduled for this study. 12 patients were excluded because of the weaning failure during T-tube trial. The patients who had optimum weaning criteria after the T-tube trial of 30 minutes were extubated. The patients were kept on VM for 1 hour to observe the hemodynamic and respiratory stability. The group of 50 patients who were successful to wean randomly allocated to have either VM (n = 25), or NIV (n = 25). Systolic arterial pressure (SAP), heart rate (HR), respiratory rate (RR), PaO2, PCO2, and pH values were recorded. Results: The number of patients who developed respiratory failure in the NIV group was significantly less than VM group of patients (3 reintubation vs. 14 NIV + 5 reintubation in the VM group). The length of stay in the ICU was also significantly shorter in NIV group (5.2 ± 4.9 vs. 16.7 ± 7.7 days). Conclusions: The ratio of the respiratory failure and the length of stay in the ICU were lower when non-invasive mechanical ventilation was used after extubation even if the patient is regarded as ‘successfully weaned’. We recommend the use of NIMV in such patients to avoid unexpected ventilator failure.

Resumo Justificativa e objetivos: Este estudo comparou as taxas de insuficiência respiratória aguda, reintubação, tempo de internação em UTI e mortalidade em pacientes sob ventilação mecânica não invasiva (VMNI) em vez da habitual máscara facial de Venturi (MV) após desmame bem-sucedido. Métodos: Após a aprovação do Comitê de Ética do hospital, 62 pacientes que estavam sob ventilação mecânica por no mínimo 48 horas foram inscritos neste estudo. Doze foram excluídos devido à falha de desmame durante o teste de tubo-T. Os que apresentaram critérios de desmame ótimos após o teste de tubo-T de 30 minutos foram extubados. Foram mantidos em MV por uma hora para observação da estabilidade hemodinâmica e respiratória. O grupo de 50 pacientes que obtiveram sucesso no desmame ventilatório foi alocado aleatoriamente para MV (n = 25) ou VNI (n = 25). Os valores de pressão arterial sistólica (PAS), frequência cardíaca (FC), frequência respiratória (FR), PaO2, PCO2 e pH foram registrados. Resultados: O número de pacientes que desenvolveu insuficiência respiratória no grupo VNI foi significativamente menor do que o do grupo MV (3 reintubações vs. 14 VNI + 5 reintubações no grupo MV). O tempo de permanência em UTI também foi significativamente menor no grupo NIV (5,2 ± 4,9 vs. 16,7 ± 7,7 dias). Conclusões: As taxas de insuficiência respiratória e do tempo de permanência em UTI foram menores quando a ventilação mecânica não invasiva foi usada após a extubação, mesmo se o paciente foi considerado como “desmame bem-sucedido”. Recomendamos o uso de VMNI em tais pacientes para evitar a falha inesperada do ventilador.

Factores clínicos y epidemiológicos relacionados a mortalidad en pacientes con estatus epiléptico en un hospital de Lima: una serie comparativa de casos / Clinical and epidemiological factors related with mortality in patients with status epilepticus in a general hospital in Lima: a comparative case series

Objetivos: El objetivo del estudio es comparar, entre dos grupos de pacientes, una serie de factores cl¡nico-epidemiol¢gicos relacionados a mortalidad: edad, sexo, comorbilidades, tipo de estatus epil‚ptico y uso deventilaci¢n mec nica. Material y M‚todos: El estudio se realiz¢ en el Hospital Cayetano Heredia entre enero de 2012 hasta diciembre de 2014. Incluy¢ 94 pacientes con el diagnóstico de estatus epil‚ptico admitidos durante el per¡odo establecido. El estudio compar¢ datos de los supervivientes contra datos de los fallecidos. Se recolect¢ la información de las historias cl¡nicas en una ficha de datos para la elaboraci¢n de una base de datos. Resultados: La mortalidad intrahospitalaria fue de 8,51%. La media de edad fue de 41,8 a¤os. Las principales etiolog¡as halladas fueron la epilepsia idiop tica (28,72%), la neurocisticercosis (14,89%) y la enfermedad cerebrovascular(14,89%). Se encontr¢ que un 19,5% de pacientes hab¡an abandonado el tratamiento antiepil‚ptico. El an lisisbivariado demostr¢, para la mortalidad intrahospitalaria, una relaci¢n significativa (p<0,05) con un alto Õndice de Comorbilidad Charlson y el uso de ventilaci¢n mec nica. Conclusiones: La presencia de comorbilidades y el uso deventilaci¢n mec nica se relacionan significativamente con mortalidad en pacientes con estatus epiléptico.

Objectives: The goal of this study is to compare, among two groups of patients, a series of clinical-epidemiologicalfactors related to mortality: age, sex, comorbidity, type of status epilepticus and use of mechanical ventilation.Material and Methods: The study was carried out in the Hospital Cayetano Heredia from January 2012 to December2014. It includes 94 patients with status epilepticus admitted during the established period. The study compareddata from the survivors against data from the deceased. Information from medical records was collected in a Data Sheet to elaborate a data bank. Results: In-hospital mortality was 8.51%. The mean of age was 41,8 a¤os. Themain etiologies found were idiopathic epilepsy (28.72%), neurocysticercosis (14.89%) and cerebrovascular disease(14.89%). It was found that 19.5% of patients had discontinued antiepileptic treatment. Bivariate analysis showed,for in-hospital lethality, a significant relationship (p<0.05) with a high Charlson Index and the use of mechanical ventilation. Conclusions: The presence of comorbidities and the use of mechanical ventilation are significantlyrelated with in-hospital mortality in patients with status epilepticus.

Morbilidad y mortalidad en pacientes con ventilación mecánica invasiva en una unidad de cuidados intensivos / Morbidity and mortality in patients with invasive mechanical ventilation in an intensive care unit

Se realizó un estudio descriptivo, transversal y retrospectivo de 175 pacientes, que requirieron de ventilación mecánica invasiva, ingresados en la Unidad de Cuidados Intensivos del Hospital General Docente "Dr. Juan Bruno Zayas Alfonso" de Santiago de Cuba, durante el año 2012, a fin de caracterizar los aspectos relacionados con la morbilidad y mortalidad en estos afectados. Se evidenció que el riesgo de fallecer para estos pacientes estuvo asociado a factores, tales como: edad avanzada, profundas alteraciones fisiológicas en relación con sus antecedentes personales, tiempo de ventilación mecánica y prolongada estadía en la unidad. Predominó la neumonía asociada a la ventilación mecánica como la principal causa de muerte relacionada directamente con gérmenes gramnegativos altamente invasivos y el mayor número de fallecidos correspondió a los pacientes operados.

A descriptive, cross sectional and retrospective study of 175 patients who required invasive mechanical ventilation, admitted in the Intensive Care Unit of "Dr. Juan Bruno Zayas Alfonso" Teaching General Hospital in Sant iago de Cuba was carried out during the year 2012, in order to characterize the aspects related to morbidity and mortality in these affected patients. It was evidenced that the risk of dying for these patients was associated with factors, such as: advanced age, marked physiologic alterations in connection with their past medical histories, duration of mechanical ventilation and prolonged stay in the unit. The pneumonia associated with mechanical ventilation prevailed as the main cause of death directly related to highly invasive gramnegative microorganisms and the highest number of deads corresponded the operated patients.

Morbimortalidad y factores de riesgo para ventilación mecánica prolongada en los pacientes de la Unidad de Terapia Intensiva del Hospital Nacional Hipólito Unanue / Morbidity and mortality and risk factors for mechanical ventilation in patients of Intensive Therapy Unit of the National Hospital Hipolito Unanue

Objetivos: Determinar la morbimortalidad en pacientes con ventilación mecánica prolongada en la UTI del Hospital Nacional Hipólito Unanue (2005-2007). Establecer los probables factores de riesgo para ventilación mecánica prolongada en los pacientes de la UTI del Hospital Nacional Hipólito Unanue (2005-2007). Material y métodos: Estudio observacional, analítico y descriptivo en 170 HC de pacientes con ventilación mecánica prolongada en la UTI, donde el instrumento principal de estudio fue la ficha de datos validada. Resultados: La edad promedio fue de 55.6±10.8 años, con mayor frecuencia de pacientes con edad entre 41>61 años, predominando el sexo masculino (55.90 por ciento). Las variables clínicas más frecuentes fueron: HTA (49.40 por ciento), ciruela previa (40.60 por ciento), Escala de Glasgow (5-12) (24.70 por ciento), Apache II (5>25) (88.25 por ciento). Score Trauma (>2-7.8) (94.75 por ciento), Falla respiratoria (90.60 por ciento), Sepsis / shock séptico (38.95 por ciento), Post quirúrgico (31.15 por ciento), ARDS (18.20 por ciento), Sedación >3 días (74.70 por ciento), Pa/FIO2 (150-299) (88.25 por ciento), BH acumulado / 1500 (50 por ciento). El destete SIMV + PS (20.20 por ciento). La tasa de mortalidad fue de 32.35 por ciento y de morbilidad 23.50 por ciento. Conclusiones: La ventilación mecánica prolongada prevaleció en el 39 por ciento de esta población. La morbilidad en los pacientes con ventilación mecánica prolongada se presentó en el 23.50 por ciento de los casos y la mortalidad en el 32.35 por ciento. Las complicaciones propias de la ventilación mecánica prolongada más frecuentes fueron: Disfunción Orgánica Múltiple, choque, sepsis, NAVM y ARDS. Los factores de riesgo para ventilación mecánica prolongada fueron: edad mayor de 41 años, sexo masculino, hipertensión arterial, cirugía previa, escala de Glasgow, Score Apache II, Score trauma, Falla respiratoria aguda, Sepsis / shock séptico, ARDS, sedación > 72 horas, Pa/FIO2 a las 48 horas <200...

Objectives: To determine the morbidity and mortality in patients with prolonged mechanical ventilation in the ICU of the National Hospital Hipolito Unanue (2005-2007). Establish the likely risk factors for prolonged mechanical ventilation in ICU patients Hipolito Unanue National Hospital (2005-2007). Methods: An observational, analytical and descriptive HC in 170 patients with prolonged mechanical ventilation in the ICU, where the main study instrument was validated data sheet. Results: Mean age was 55.6±10.8 years, more frequently in patients aged between 41>61 years, mainly boys (55.90 per cent). The most common clinical variables were: hypertension (49.40 per cent), previous surgery (40.60 per cent), Glasgow Scale (5-12) (24.70 per cent), Apache II (5> 25) (88.25 per cent). Score Trauma (> 2-7.8) (94.75 per cent), respiratory failure (90.60 per cent), sepsis / septic shock (38.95 per cent), Post surgical (31.15 per cent), ARDS (18.20 per cent), sedation >3 days (74.70 per cent), Pa/FIO2 (150- 299) (88.25 per cent), accumulated BH / 1500 (50 per cent). Weaning SIMV + PS (20.20 per cent). The mortality rate was 32.35 per cent and 23.50 per cent morbidity. Conclusions: Prolonged mechanical ventilation prevailed in 39 per cent of this population. The morbidity in patients with prolonged mechanical ventilation was presented in 23.50 per cent of cases and mortality in 32.35 per cent. The complications of prolonged mechanical ventilation were the most common multiple organ dysfunction, shock, sepsis, VAP and ARDS. Risk factors for prolonged mechanical ventilation were: age over 41 years, male sex, hypertension, previous surgery, GCS, APACHE II score, Score trauma, acute respiratory failure, sepsis / septic shock, ARDS, sedation >72 hours to 48 hours Pa/FIO2 <200, and accumulated water balance >1500.

Características generales y factores predictores de mortalidad hospitalaria en pacientes con asistencia ventilatoria mecánica / General characteristics and predictive factors of Hospital mortality in patients with assistance mechanical ventilation

Objetivo: Estudiar características generales y factores predictores de mortalidad hospitalaria en pacientes internados en Unidad de Terapia Intensiva (UTI) que requirieron Asistencia ventilatoria mecánica (AVM).Diseño: Estudio prospectivo, observacional, 36 meses de duración. Ámbito: Terapia intensiva polivalente. Hospital universitario. Pacientes: AVM ≥24 horas. Variables de interés: Datos demográficos; tipo de patología de ingreso a UTI; tiempo de internación en UTI y hospital; escores al ingreso, PCR (mg/dl); AVM: motivo de inicio, permanencia y complicaciones asociadas; evolución. Resultados: 372 pacientes requirieron AVM. Edad media 52 años (r 18-93), 67% eran varones. Estadía en UTI fue 12,59 (±13,52) días y Hospital de 20,31 (±25,20). 53,2% fallecieron en UTI. Se realizó comparación de variables entre sobrevivientes y fallecidos. Análisis de regresión logística múltiple se incluyeron: edad, PCR, APACHE II, SAPS II, SOFA, patología médica, insuficiencia respiratoria y utilización de vasopresores. Mayor valor predictivo fueron: edad, patología médica, uso de vasopresores y PCR. (D de Sommer = 0,59). Sensibilidad: 68,15% (60,18 - 75,22), especificidad: 75,35% (68,93 - 80,84), VPP 66,88% (58,94 - 73,99), VPN 76,42% (70,01­ 81,84). La curva COR presenta un AUC de 0,793 (IC 95%: 0,747-0,839) p = 0,000.Conclusiones: Factores predictores de mortalidad fueron: edad (p=0,007), utilización de vasopresores (p=0,000) y patología médica (p=0,002). PCR, mostró un valor de p cercano al valor de significación (p=0,065).(AU)

Objective: Examining the general characteristics and predictive factors of inhospital mortality in patients in Intensive Care Unit (ICU) who needed mechanical ventilatory support (MVS). Design: Prospective and observational study, 36 months duration. Area: Multipurpose intensive therapy. University hospital. Patients: MVS≥24 hours. Variables of interest: Demographic data, type of pathology on admission to ICU, hospitalization time, scoring, C - reactive protein (CRP) (mg/dl), MVS: reason for initiation, duration and complications associated; evolution. Results: 372 of the patients required MVS, average age was 52 years old (r 18-93), 67% were men. Intensive care unit length of stay was 12, 59 (±13, 52) days and hospital length of stay was 20, 31 (±25, 20). 53,2% died in ICU. A comparison of variables between survivors and deceased was made. Multiple logistic regression (MLR) analysis included: age, PCR, APACHE II, SAPS II, SOFA, medical condition, respiratory failure and use of vasopressors. The greatest predictive value was: age, medical condition, use of vasopressors and PCR. (Sommer´s D = 0,59). Sensitivity 68,15% (60,18 - 75,22), specificity: 75,35% (68,93 - 80,84), VPP 66,88% (58,94 - 73,99), VPN 76,42% (70,01­ 81,84). AUC of ROC was 0,793 (IC 95%: 0,747-0,839) p = 0,000. Conclusion: Predictive factors of mortality were: age (p=0,007), use of vasopressors (p=0,000) and medical condition (p=0,002). CRP showed a p-value close to a significance value of (p=0,065).(AU)

Predictors of mortality in mechanically ventilated COPD patients

Patients with chronic obstructive pulmonary disease [COPD] commonly require hospitalization and admission to intensive care unit. It is useful to identify patients at the time of admission who are likely to have poor outcome. This study was carried out to define the predictors of mortality in mechanically ventilated COPD patients and to advice a scoring system using the baseline physiological variables for prognosticating these patients. This study comprised 220 patients with acute respiratory failure [ARF] secondary to COPD, requiring mechanical ventilation [MV] and admitted to the intensive care unit [ICU] of Menoufiya Chest Department over a two-year period. Clinical and demographic data including APACHE III [Acute Physiology and Chronic Health Status Evaluation] score and Charlson co-morbidity score were recorded on MV, at the time of admission to the ICU. In addition, the acid base status, renal and liver functions, serum electrolytes, LDH, CRP and albumin were recorded at the time of presentation. The length of stay in-hospital, in the ICU, and mechanical ventilation were also recorded. The mean serum albumin level was 2.77 +/- 0.39 gm/dL and 2.11 +/- 0.19 for survivors and non-survivors, respectively [p < 0.05]. As regards ABGs; the mean PaCO2 was 54.8 +/- 6.39 mmHg and 76.1 +/- 11.1, PaO2 was 54.8 +/- 7.1 mmHg and 50.2 +/- 4.9, and HCO3 was 34.7 +/- 4.2 mEq/L and 41.6 +/- 4.8 in survivors and non-survivors, respectively [p < 0.05]. Charlson co-morbidity index demonstrated a cut off value of 1.4 +/- 0.3 and 2.6 +/- 0.6 and APACHE III score off value was 45.2 +/- 12.62 and 80.9 +/- 15, for survivors and non-survivors, respectively with statistically significant correlation for both indices [p < 0.05]. The present results indicate that the severity scores, like Charlson co-morbidity and APACHE III scores, are useful and reliable tools for predicting mortality in COPD patients requiring MV. Serum albumin level, renal functions as well as the oxygenation and ventilation parameters can also, predict mortality

Alternativas de tratamento para pacientes pediátricos em ventilação mecânica crônica / Care alternatives for pediatric chronic mechanical ventilation

OBJETIVO: Determinar o impacto da transferência de uma população pediátrica para unidades de dependentes de ventilação mecânica (UDVMs) ou para ventilação mecânica domiciliar (VMD) na disponibilidade de leitos na unidade de terapia intensiva (UTI) pediátrica. MÉTODOS: Estudo longitudinal retrospectivo de crianças hospitalizadas que necessitavam de VM prolongada na UDVM do Hospital Auxiliar de Suzano, um hospital público secundário do estado de São Paulo. Calculamos o número de dias que os pacientes passaram na UDVM e em VMD e analisamos sua sobrevida com o estimador Kaplan-Meier. RESULTADOS: Quarenta e um pacientes foram admitidos na UDVM em 7,3 anos. A mediana do tempo de internação na unidade foi de 239 dias (amplitude interquartil = 102-479). Desses pacientes, 22 vieram da UTI pediátrica, onde a transferência disponibilizou 8.643 leitos-dia (uma média de 14 novos pacientes por mês). A VMD de oito pacientes disponibilizou 4.022 leitos-dia no hospital em 4 anos (uma média de 12 novos pacientes por mês na UTI). A taxa de sobrevida dos pacientes em casa não foi significativamente diferente daquela verificada nos pacientes hospitalizados. CONCLUSÕES: Uma unidade hospitalar para dependentes de ventilação mecânica e a VMD podem melhorar a disponibilidade de leitos em UTIs. A taxa de sobrevida dos pacientes que recebem VMD não apresentou diferenças significativas em relação à dos pacientes que permanecem hospitalizados.

OBJECTIVE: To determine the impact of transferring a pediatric population to mechanical ventilator dependency units (MVDUs) or to home mechanical ventilation (HMV) on bed availability in the pediatric intensive care unit (ICU). METHODS: This is a longitudinal, retrospective study of hospitalized children who required prolonged mechanical ventilation at the MVDU located at the Hospital Auxiliar de Suzano, a secondary public hospital in São Paulo, Brazil. We calculated the number of days patients spent at MVDU and on HMV, and analyzed their survival rates with Kaplan-Meier estimator. RESULTS: Forty-one patients were admitted to the MVDU in 7.3 years. Median length of stay in this unit was 239 days (interquartile range = 102-479). Of these patients, 22 came from the ICU, where their transfer made available 8,643 bed-days (a mean of 14 new patients per month). HMV of eight patients made 4,022 bed-days available in the hospital in 4 years (a mean of 12 new patients per month in the ICU). Survival rates of patients at home were not significantly different from those observed in hospitalized patients. CONCLUSIONS: A hospital unit for mechanical ventilator-dependent patients and HMV can improve bed availability in ICUs. Survival rates of patients who receive HMV are not significantly different from those of patients who remain hospitalized.

Asistencia respiratoria mecánica: Influencia de la edad en la evolución / Mechanical ventilation: Influence of the age in the outcome

No existe un concepto definido sobre la influencia de la edad en la mortalidad de la asistencia respiratoria mecánica. Realizamos un trabajo prospectivo-observacional para determinar si la edad es un factor independiente de mortalidad de la asistencia respiratoria mecánica. Se incluyeron 200 pacientes internados en la Unidad de Cuidados Intensivos del Hospital Británico de Buenos Aires. Se registraron características y comorbilidades al ingreso, al inicio de la asistencia respiratoria mecánica, complicaciones y evolución en el Hospital y a los 6 meses. Los 200 pacientes incluidos fueron divididos en dos grupos: Grupo 1 (n = 164) menores de 80 años y Grupo 2 (n = 36) de 80 años o más. No hubo diferencias en la mortalidad en la Unidad de Cuidados Intensivos y en el Hospital entre los pacientes menores de 80 años y los de 80 años o más. (55.56% vs. 41.46% y 58.33% vs. 42.68%). La supervivencia a los 6 meses de los = 80 años fue significativamente menor (22.22% vs. 48.17%, p = 0.0051). En el análisis multivariado solamente un APACHE II > 20 (p = 0.0007) o la ausencia de vida autónoma (p = 0.0028) conservaron poder predictivo independiente. Los pacientes añosos que reciben asistencia respiratoria mecánica no presentan una mayor mortalidad por el sólo hecho de ser ancianos. La restricción de los cuidados terapéuticos invasivos no parece justificada por la edad avanzada.

There is not consensus about the true influence of age on mortality associated to mechanical ventilation (MV). We performed a prospective study in order to determine if age is an independent factor to predict mortality in patients under MV. Two hundred patients requiring MV at the intensive care unit were included and clinical variables at admission, co-morbidities, complications and outcome at the hospital and after 6 months were registered. Patients were divided in 2 groups: Group 1 (n = 164) under 80 year old and Group 2 (n = 36) 80 year or older. There were no differences in intensive care unit or hospital mortality between the two groups (55.56% vs. 41.46% and 58.33% vs. 42.68%). Six-month survival were significantly lower in patients over 80 year-old (22.22% vs. 48.17%, p = 0.0051). Multivariate analysis showed that only an APACHE II score > 20 (p = 0.0077) or the absence of an autonomous life (p = 0.0028) were independent predictive factors of mortality. Elderly patients under mechanical ventilation do not show a higher mortality because of the advance age in itself. Restriction of mechanical ventilation and invasive care does not seem to be justified based on the advanced age.