Mechanical ventilation weaning practices in neonatal and pediatric ICUs in Brazil: the Weaning Survey-Brazil / Práticas de desmame da ventilação mecânica nas UTIs pediátricas e neonatais brasileiras: Weaning Survey-Brazil

ABSTRACT Objective: The aim of this study was to describe practices for weaning from mechanical ventilation (MV), in terms of the use of protocols, methods, and criteria, in pediatric ICUs (PICUs), neonatal ICUs (NICUs), and mixed neonatal/pediatric ICUs (NPICUs) in Brazil. Methods: This was a cross-sectional survey carried out by sending an electronic questionnaire to a total of 298 NICUs, PICUs, and NPICUs throughout Brazil. Results: Completed questionnaires were assessed for 146 hospitals, NICUs accounting for 49.3% of the questionnaires received, whereas PICUs and NPICUs accounted for 35.6% and 15.1%, respectively. Weaning protocols were applied in 57.5% of the units. In the NICUs and NPICUs that used weaning protocols, the method of MV weaning most commonly employed (in 60.5% and 50.0%, respectively) was standardized gradual withdrawal from ventilatory support, whereas that employed in most (53.0%) of the PICUs was spontaneous breathing trial (SBT). During the SBTs, the most common ventilation mode, in all ICUs, was pressure-support ventilation (10.03 ± 3.15 cmH2O) with positive end-expiratory pressure. The mean SBT duration was 35.76 ± 29.03 min in the NICUs, compared with 76.42 ± 41.09 min in the PICUs. The SBT parameters, weaning ventilation modes, and time frame considered for extubation failure were not found to be dependent on the age profile of the ICU population. The findings of the clinical evaluation and arterial blood gas analysis are frequently used as criteria to assess readiness for extubation, regardless of the age group served by the ICU. Conclusions: In Brazil, the clinical practices for weaning from MV and extubation appear to vary depending on the age group served by the ICU. It seems that weaning protocols and SBTs are used mainly in PICUs, whereas gradual withdrawal from ventilatory support is more widely used in NICUs and NPICUs.

RESUMO Objetivo: Descrever as práticas de desmame da ventilação mecânica (VM), quanto ao uso de protocolos, métodos e critérios, em UTIs pediátricas (UTIPs), neonatais (UTINs) e mistas - neonatais e pediátricas (UTINPs) - no Brasil. Métodos: Estudo transversal, tipo inquérito, realizado por meio do envio de questionário eletrônico a 298 UTINs, UTIPs e UTINPs de todo o país. Resultados: Foram avaliados 146 questionários respondidos (49,3% recebidos de UTINs, 35,6%, de UTIPs e 15,1%, de UTINPs). Das unidades pesquisadas, 57,5% aplicavam protocolos de desmame. Nas UTINs e UTINPs que utilizavam esses protocolos, o método de desmame da VM mais empregado (em 60,5% e 50,0%, respectivamente) foi a redução gradual padronizada do suporte ventilatório, enquanto o empregado na maioria (53,0%) das UTIPs foi o teste de respiração espontânea (TRE). Durante o TRE, o modo ventilatório predominante em todas as UTIs foi a ventilação com pressão de suporte (10,03 ± 3,15 cmH2O) com pressão expiratória final positiva. A duração média do TRE foi de 35,76 ± 29,03 min nas UTINs, contra 76,42 ± 41,09 min nas UTIPs. Os parâmetros do TRE, modos ventilatórios de desmame e tempo considerado para falha de extubação não se mostraram dependentes do perfil etário da população das UTIs. Os resultados da avaliação clínica e da gasometria arterial são frequentemente utilizados como critérios para avaliar a prontidão para extubação, independentemente da faixa etária atendida pela UTI. Conclusões: No Brasil, a prática clínica na condução do desmame da VM e extubação varia de acordo com a faixa etária atendida pela UTI. Protocolos de desmame e o TRE são utilizados principalmente nas UTIPs, enquanto a redução gradual do suporte ventilatório é mais utilizada nas UTINs e UTINPs.

Prácticas de destete ventilatorio en las unidades de cuidado intensivo de la ciudad de Cali / Ventilatory weaning practices in intensive care units in the city of Cali

Objetivo: El destete temprano de la ventilación mecánica es uno de los objetivos primordiales en el manejo del paciente crítico. Existen diversas técnicas y parámetros de medida para realizarlo. El objetivo de esta investigación fue describir las prácticas del destete ventilatorio en unidades de cuidado intensivo adulto en la ciudad de Cali. Métodos: Una encuesta de 32 preguntas; algunas de múltiple escogencia, que evaluaron las prácticas del destete, fue distribuida entre los fisioterapeutas y terapeutas respiratorios que trabajaban en unidades de cuidado intensivo, para ser respondida de forma anónima. Resultados: La estrategia más frecuente para el registro de parámetros fue la combinación de presión positiva continua con presión de soporte (78%), con gran variabilidad en los niveles de presión, siendo el rango más frecuente de 6 a 8cmH2O. Los parámetros de destete más registrados fueron: el volumen corriente (92,6%), la frecuencia respiratoria (93,3%) y la saturación de oxígeno (90,4%). El tiempo de espera más frecuente para el registro de los parámetros fue >15 minutos (40%). Las medidas se realizaron preferentemente con el display del ventilador. Conclusion: Existe una gran variabilidad sobre los métodos y la medición de los parámetros de destete ventilatorio. El método más utilizado fue presión positiva continua en la vía aérea más presión de soporte y los parámetros de destete más usados fueron la medición del volumen corriente y la frecuencia respiratoria. .

Objective: Early weaning from mechanical ventilation is one of the primary goals in managing critically ill patients. There are various techniques and measurement parameters for such weaning. The objective of this study was to describe the practices of ventilatory weaning in adult intensive care units in the city of Cali. Methods: A survey of 32 questions (some multiple choice) evaluating weaning practices was distributed to physiotherapists and respiratory therapists working in intensive care units, to be answered anonymously. Results: The most common strategy for the parameter set was the combination of continuous positive airway pressure with pressure support (78%), with a large variability in pressure levels, the most common range being 6 to 8cmH2O. The most common weaning parameters were as follows: tidal volume (92.6%), respiratory rate (93.3%) and oxygen saturation (90.4%). The most common waiting time for registration of the parameters was >15 minutes (40%). The measurements were preferably obtained from the ventilator display. Conclusion: The methods and measurement parameters of ventilatory weaning vary greatly. The most commonly used method was continuous positive airway pressure with more pressure support and the most commonly used weaning parameters were the measured tidal volume and respiratory rate. .