RESUMO
OBJECTIVES: An objective categorization of respiratory infections based on outcomes is an unmet clinical need. Ventilator-associated pneumonia and tracheobronchitis remain used in clinical practice, whereas ventilator-associated events (VAE) are limited to surveillance purposes. RESEARCH METHODOLOGY/DESIGN: This was a secondary analysis from a multicentre observational prospective cohort study. VAE were defined as a sustained increase in minimum Oxygen inspired fraction (FiO2) and/or Positive end-expiratory pressures (PEEP) of ≥ 0.2/2 cm H2O respectively, or an increase of 0.15 FiO2 + 1 cm H20 positive end-expiratory pressures for ≥ 1 calendar-day. SETTING: 15 Paediatric Intensive Care Units. MAIN OUTCOME MEASURES: Mechanical ventilation duration, intensive care and hospital length of stay; (LOS) and mortality. RESULTS: A cohort of 391 ventilated children with an age (median, [Interquartile Ranges]) of 1 year[0.2-5.3] and 7 days[5-10] of mechanical ventilation were included. Intensive care and hospital stays were 11 [7-19] and 21 [14-39] days, respectively. Mortality was 5.9 %. Fifty-eight ventilator-associated respiratory infections were documented among 57 patients: Seventeen (29.3 %) qualified as ventilator-associated pneumonia (VAP) and 41 (70.7 %) as ventilator-associated tracheobronchitis (VAT). Eight pneumonias and 16 tracheobronchitis (47 % vs 39 %,P = 0.571) required positive end-expiratory pressure or oxygen increases consistent with ventilator-associated criteria. Pneumonias did not significantly impact on outcomes when compared to tracheobronchitis. In contrast, infections (pneumonia or tracheobronchitis) following VAEs criteria were associated with > 6, 8 and 15 extra-days of ventilation (16 vs 9.5, P = 0.001), intensive care stay (23.5 vs 15; P = 0.004) and hospital stay (39 vs 24; P = 0.015), respectively. CONCLUSION: When assessing ventilated children with respiratory infections, VAE apparently is associated with higher ventilator-dependency and LOS compared with pneumonia or tracheobronchitis. IMPLICATIONS FOR PRACTICE: Incorporating the modification of ventilatory settings for further categorization of the respiratory infections may facilitate therapeutic management among ventilated patients.
Assuntos
Unidades de Terapia Intensiva Pediátrica , Respiração Artificial , Humanos , Estudos Prospectivos , Masculino , Feminino , Pré-Escolar , Lactente , Unidades de Terapia Intensiva Pediátrica/estatística & dados numéricos , Respiração Artificial/efeitos adversos , Respiração Artificial/métodos , Respiração Artificial/estatística & dados numéricos , Estudos de Coortes , Pneumonia Associada à Ventilação Mecânica/etiologia , Tempo de Internação/estatística & dados numéricos , Bronquite/etiologia , Bronquite/fisiopatologia , Traqueíte/etiologia , Traqueíte/fisiopatologia , Infecções Respiratórias/complicações , Criança , Recém-NascidoRESUMO
RESUMO As infecções do trato respiratório inferior associadas à ventilação mecânica são uma das complicações mais frequentes em pacientes em ventilação mecânica. Há muitos anos, a traqueobronquite associada à ventilação mecânica tem sido considerada uma doença que não demanda antibioticoterapia. Na última década, diversos estudos demonstraram que a traqueobronquite associada à ventilação mecânica deve ser considerada um processo intermediário que leva à pneumonia associada à ventilação mecânica, uma vez que apesar de ter impacto limitado sobre a mortalidade dos pacientes gravemente enfermos internados nas unidades de terapia intensiva, em contrapartida, demonstra associação significativa com o aumento dos custos hospitalares desses pacientes, assim como do tempo de internação na unidade de terapia intensiva e hospitalar, do uso de antibióticos, e da duração da ventilação mecânica. Embora ainda necessitemos de evidências científicas mais robustas, especialmente no que tange às modalidades terapêuticas, os dados atuais a respeito da traqueobronquite associada à ventilação mecânica salientam que há desfechos suficientemente importantes que exigem vigilância epidemiológica e controle clínico adequados.
ABSTRACT Ventilator-associated lower respiratory tract infection is one of the most frequent complications in mechanically ventilated patients. Ventilator-associated tracheobronchitis has been considered a disease that does not warrant antibiotic treatment by the medical community for many years. In the last decade, several studies have shown that tracheobronchitis could be considered an intermediate process that leads to ventilator-associated pneumonia. Furthermore, ventilator-associated tracheobronchitis has a limited impact on overall mortality but shows a significant association with increased patient costs, length of stay, antibiotic use, and duration of mechanical ventilation. Although we still need clear evidence, especially concerning treatment modalities, the present study on ventilator-associated tracheobronchitis highlights that there are important impacts of including this condition in clinical management and epidemiological and infection surveillance.
Assuntos
Humanos , Respiração Artificial/efeitos adversos , Traqueíte/etiologia , Bronquite/etiologia , Respiração Artificial/métodos , Infecções Respiratórias/etiologia , Infecções Respiratórias/epidemiologia , Traqueíte/epidemiologia , Bronquite/epidemiologia , Pneumonia Associada à Ventilação Mecânica/epidemiologia , Antibacterianos/administração & dosagemRESUMO
Introducción: Las infecciones asociadas a ventilación mecánica son causa importante de morbimortalidad en el paciente crítico. La diferenciación entre traqueobronquitis y neumonía no es siempre fácil, y es controvertida. Algunos trabajos describen aumento de mortalidad, mayor estancia en Unidades de Cuidado Intensivo (UCI), mayor requerimiento de ventilación mecánica e incremento de costos en pacientes con traqueobronquitis asociada a ventilador (TAV), sin diferencias significativas en pacientes con neumonía asociada a ventilador (NAV). Estos estudios no describen el comportamiento clínico y epidemiológico de la TAV y la NAV como 2 entidades independientes, por lo que es necesario describirlo. Métodos: Estudio multicéntrico de cohorte prospectiva, de pacientes adultos que desarrollaron TAV o NAV durante su estancia en UCI, entre noviembre de 2013 y octubre de 2014. A cada una de las variables demográficas, clínicas, de laboratorio y de desenlace, como tiempo de ventilación mecánica, estancia hospitalaria y muerte, se le realizó análisis descriptivo; para evaluar las diferencias entre los grupos se utilizó test de chi cuadrado, t de Student o U de Mann Whitney. Resultados: Se incluyó a 143 pacientes, con edad promedio de 55 años, 57% eran hombres, de 6 países en Latinoamérica; 63% con NAV y 37% con TAV. Las comorbilidades más frecuentes fueron cardiovascular (44%) y neurológica (30%); esta última fue más frecuente en TAV (41,5 vs. 23%; p = 0,02). No se encontró diferencia en APACHE II de ingreso. El índice SOFA fue mayor en NAV (8 vs. 5; p = 0,02). No hubo diferencias en el aislamiento microbiológico, ni en los patrones de resistencia bacteriana entre las 2 entidades. Se observó mayor número de complicaciones cardiovasculares y SDRA en pacientes con NAV. No se encontró diferencia entre los 2 grupos en estancia en UCI, los días de ventilación mecánica ni en mortalidad. Conclusiones: La prevalencia de TAV fue mayor a lo descrito hasta ahora en la literatura. No se encontraron diferencias significativas en el aislamiento microbiológico, la resistencia bacteriana ni el esquema antibiótico utilizado en los 2 grupos. Aunque la NAV cursó con mayor proporción de complicaciones médicas asociadas, el hallazgo de una estancia hospitalaria, tiempo de ventilación mecánica y mortalidad similares sustenta la importancia clínica de la TAV.
Introduction: The infections associated with mechanical ventilation are a major cause of morbidity and mortality in critically ill patients. Limited studies report increased mortality and intensive care units (ICU) stays, requirements for mechanical ventilation and higher costs in ventilator-associated tracheobronchitis (TAV) in comparison to patients with ventilator-associated pneumonia (NAV). These studies do not describe the clinical and epidemiological behavior in the same population as independent entities, so it is necessary to describe the epidemiology of patients with TAV and NAV. Methods: Multicenter cross-sectional study of adult patients who developed TAV and/or NAV during their stay in the ICU in 2013 to 2014. A descriptive analysis was performed on each of the variables. For qualitative variables we assessed differences between groups using the Chi-squared test; for continuous variables, we used Student's t test or the Mann Whitney U test. Results: A total of 147 patients from 6 countries in Latin America were included; 63% with NAV and 37% with TAV. The average age was 55 years; 57% male. The most frequent comorbidity was cardiovascular (44%) and neurological (30%), the latter was more frequent in those with TAV (41.5 vs. 23%, P = .02). No differences were found in APACHE II on entry, but the difference appears in the SOFA index (8 vs. 5, P = .02). There were no differences in microbiological isolation, or bacterial resistance patterns between the 2 entities. A greater number of cardiovascular complications and ARDS were observed in patients with NAV. The ICU stay, days on mechanical ventilation and mortality were not different between the 2 groups. Conclusions: The TAV prevalence was higher than heretofore described in the literature. No significant differences were found in the microbiological isolation, bacterial resistance and antibiotic therapy used in the 2 groups, which might suggest that therapeutic approach be similar to that recommended for NAV. No differences were observed in clinical outcomes such as hospital stay, duration of mechanical ventilation and mortality, although NAV was associated with a greater proportion of medical complications.
Assuntos
Humanos , Masculino , Feminino , Pessoa de Meia-Idade , Pneumonia , Cuidados Críticos , Bronquite Crônica , Respiração Artificial , Epidemiologia , Assistência Centrada no Paciente , Cursos de Capacitação , América LatinaRESUMO
Introducción: las infecciones respiratorias bajas ocupan el primer lugar entre las infecciones relacionadas con el cuidado sanitario en unidades de cuidados intensivos. Objetivos: describir la incidencia y las consecuencias, sobre estadía y mortalidad, de la traqueobronquitis asociada a ventilación mecánica (TAVM) en UCI. Métodos: estudio multricéntrico, descriptivo, prospectivo y transversal, en 6 UCI de adultos. Se estudiaron 454 pacientes. Las variables de estudio fueron recogidas en 2 bases de datos. Resultados: tasa de incidencia de TAVM: 1,76 por ciento.Con respecto al número total de pacientes con factor de riesgo: 6,06 por ciento, Densidad de incidencia: 7,61 por ciento por 1 000 d con factor de riesgo. Estadía media, TAVM: 13,13 d, pacientes sin IRCS: 5,49 d (p=0,006). Mortalidad, TAVM: 25 por ciento, NAVM: 55,2 por ciento, pacientes sin IRCS: 14,9 por ciento(p=0,000). Conclusiones: la TAVM no es infrecuente en UCI. Su diagnóstico implica aumento de estadía y mortalidad en pacientes ventilados. Se justifica la implementación de medidas de vigilancia y prevención
Introduction: lower respiratory infections rank first among related infections in health care intensive care units. Objectives: to describe the incidence and consequences of stay and mortality of ventilator-associated tracheobronchitis (TAVM) in ICU. Methods: a multicenter, descriptive, prospective and cross-sectional study was conducted in 6 adult ICU. 454 patients were studied. The study variables were collected in two databases. Results: TAVM incidence rate: 1.76 percent, relative to the total number of patients with risk factor: 6.06 percent. Incidence density: 7.61 percent by 1000 d with risk factor. Average stay, TAVM: 13.13 d, patients without IRCS: 5.49 d (p = 0.006). Mortality, TAVM: 25 percent, VAP: 55.2 percent , patients without IRCS: 14.9 percent (p = 0.000). Conclusions: TAVM is not uncommon in ICU. Its diagnosis involves increased stay and its mortality in ventilated patients. The implementation of surveillance and prevention measures is requiered