title: Can manual hyperinflation maneuvers cause aspiration of oropharyngeal secretions in patients under mechanical ventilation?
abstract: OBJECTIVE
  To evaluate whether manual hyperinflation maneuvers can cause aspiration of oropharyngeal secretions in patients under mechanical ventilation.
  
  
  METHODS
  Adult patients under mechanical ventilation in whom a dye was injected in the oropharyngeal cavity and had their tracheal secretion aspirated after 30 minutes (min) participated in this study. In the event of dye slid, the patient was eliminated. The other patients were divided in Control Group: patients in whom tracheal secretions were aspirated after 30, 60, 120, and 180 min, and Experimental Group: after 30 min, manual hyperventilation maneuvers were performed and secretions were aspirated on the established intervals.
  
  
  RESULTS
  Forty-three patients were enrolled in this study. In 13, dye slippage was observed after 30 min, before allocating them into two groups. In the remaining 29 patients, 226 secretion samples were collected. In only two samples the presence of dye in the secretion was observed after manual hyperinflation maneuvers in the experimental group.
  
  
  CONCLUSIONS
  Manual hyperinflation maneuvers did not cause aspiration of oropharyngeal secretions in patients under mechanical ventilation.
authors.affiliation: Hospital das Clínicas da Universidade Estadual de Campinas, Brazil. armandogodoy@ig.com.br
authors.forename: Armando Carlos Franco
authors.initials: AC
authors.lastname: de Godoy
authors.forename: Carla de Oliveira
authors.initials: Cde O
authors.lastname: Yokota
authors.forename: Izilda Ismênia Muglia
authors.initials: II
authors.lastname: Araújo
authors.forename: Maria Isabel Pedreira
authors.initials: MI
authors.lastname: de Freitas
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D012634:Bodily Secretions; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009960:Oropharynx / Q000378:metabolism; D026741:Physical Therapy Modalities / Q000009:adverse effects*; D012121:Respiration, Artificial; D053120:Respiratory Aspiration / Q000209:etiology*; D055815:Young Adult