Características de la ventilación no invasiva prolongada en los servicios de urgencias hospitalarios y su impacto en la eficacia. Análisis del registro VNICat

OBJECTIVE: To analyze the characteristics and variables associated with prolonged noninvasive ventilation performed completely in Emergency Departments (NIV-ED) and its influence upon effectiveness. DESIGN: A prospective, multicenter, observational multipurpose cohort study was carried out. SETTING: VNICat Registry. SUBJECTS: Patients in which NIV-ED was performed in 11 Catalan hospitals in the months of February or March 2015. INTERVENTION: No. VARIABLES: The study variable was NIV-ED, which as a function of time was defined as prolonged or not prolonged. The efficacy variable was the success of the technique in terms of patient improvement. RESULTS: A total of 125 patients were included, with a median NIV-ED duration of 12hours, which was the cut-off point for the comparator groups. In 60 cases (48%) NIV-ED was not prolonged ( /=12hours). Non-prolonged NIV-ED was associated to the indication of acute heart failure and prolonged ventilation to the presence of diabetes. There were no differences between non-prolonged and prolonged NIV-ED in terms of efficacy, and the success rate in terms of improvement was 68.3% and 76.9%, respectively, with an adjusted odds ratio of 1.49 (95%CI 0.61-3.60). CONCLUSIONS: Prolonged NIV-ED is a frequent situation, but few variables associated to it have been studied. The presence of prolonged ventilation did not influence the success rate of NIV.