title: The effects of increasing effective airway diameter on weaning from mechanical ventilation in tracheostomized patients: a randomized controlled trial.
abstract: OBJECTIVE
  To determine the effects of deflating the tracheal cuff during disconnections from mechanical ventilation (MV) in tracheostomized patients.
  
  
  METHODS
  This was a single-center, randomized trial conducted in a general ICU of a tertiary hospital with regional referral for trauma patients. Patients at high risk of aspiration based on the drink test were excluded. Critically ill tracheostomized patients were randomized to have the tracheal cuff deflated or not during spontaneous breathing trials. Weaning was protocolized on progressive T-tube trials, and patients were considered weaned after 24 consecutive hours disconnected from MV. The primary end point was time to definitive withdrawal of MV; secondary end points were ventilator-associated respiratory infection (pneumonia and/or tracheobronchitis) and swallowing function. Statistical analyses included Cox proportional risk models.
  
  
  RESULTS
  We randomized 195 patients and 181 patients completed the study (94 patients with deflated cuff and 87 with inflated cuff). Variables independently related to weaning time in the multivariate analysis were tracheostomy-to-first MV disconnection time (HR 0.5, 95 % CI 0.3-0.8; p < 0.01) and cuff deflation (HR 2.2, 95 % CI 1.5-3; p < 0.01). Respiratory infection was lower in the deflated group (20 vs. 36 %; p = 0.02). Swallowing function improved more in the deflated group (31 vs. 22 %; p = 0.02).
  
  
  CONCLUSIONS
  Under the conditions of our protocol, deflating the tracheal cuff in tracheostomized patients shortens weaning, reduces respiratory infections, and probably improves swallowing.
authors.affiliation: Intensive Care Unit, Hospital Infanta Sofía, Madrid, Spain. ghernandezm@telefonica.net
authors.forename: Gonzalo
authors.initials: G
authors.lastname: Hernandez
authors.forename: Ana
authors.initials: A
authors.lastname: Pedrosa
authors.forename: Ramon
authors.initials: R
authors.lastname: Ortiz
authors.forename: Maria del Mar
authors.initials: Mdel M
authors.lastname: Cruz Accuaroni
authors.forename: Rafael
authors.initials: R
authors.lastname: Cuena
authors.forename: Concepción
authors.initials: C
authors.lastname: Vaquero Collado
authors.forename: Susana
authors.initials: S
authors.lastname: García Plaza
authors.forename: Paloma
authors.initials: P
authors.lastname: González Arenas
authors.forename: Rafael
authors.initials: R
authors.lastname: Fernandez
mesh_terms: D018806:APACHE; D016638:Critical Illness; D003680:Deglutition Disorders / Q000453:epidemiology; D005260:Female; D006801:Humans; D007362:Intensive Care Units; D008297:Male; D008875:Middle Aged; D053717:Pneumonia, Ventilator-Associated / Q000453:epidemiology; D011446:Prospective Studies; D012121:Respiration, Artificial; D013030:Spain / Q000453:epidemiology; D014139:Tracheostomy; D016896:Treatment Outcome; D015300:Ventilator Weaning