title: Association between the rapid shallow breathing index and extubation success in patients with traumatic brain injury.
abstract: OBJECTIVE
  To investigate the association between the rapid shallow breathing index and successful extubation in patients with traumatic brain injury.
  
  
  METHODS
  This study was a prospective study conducted in patients with traumatic brain injury of both genders who underwent mechanical ventilation for at least two days and who passed a spontaneous breathing trial. The minute volume and respiratory rate were measured using a ventilometer, and the data were used to calculate the rapid shallow breathing index (respiratory rate/tidal volume). The dependent variable was the extubation outcome: reintubation after up to 48 hours (extubation failure) or not (extubation success). The independent variable was the rapid shallow breathing index measured after a successful spontaneous breathing trial.
  
  
  RESULTS
  The sample comprised 119 individuals, including 111 (93.3%) males. The average age of the sample was 35.0 ± 12.9 years old. The average duration of mechanical ventilation was 8.1 ± 3.6 days. A total of 104 (87.4%) participants achieved successful extubation. No association was found between the rapid shallow breathing index and extubation success.
  
  
  CONCLUSIONS
  The rapid shallow breathing index was not associated with successful extubation in patients with traumatic brain injury.
authors.affiliation: Universidade Federal da Bahia, SalvadorBA, Brasil.
authors.forename: Helena França Correia
authors.initials: HF
authors.lastname: dos Reis
authors.forename: Mônica Lajana Oliveira
authors.initials: ML
authors.lastname: Almeida
authors.forename: Mário Ferreira
authors.initials: MF
authors.lastname: da Silva
authors.forename: Julião Oliveira
authors.initials: JO
authors.lastname: Moreira
authors.forename: Mário de Seixas
authors.initials: Mde S
authors.lastname: Rocha
mesh_terms: D000328:Adult; D060666:Airway Extubation; D001930:Brain Injuries / Q000503:physiopathology / Q000628:therapy*; D005260:Female; D006801:Humans; D008297:Male; D011446:Prospective Studies; D012119:Respiration; D012121:Respiration, Artificial; D015300:Ventilator Weaning