title: The effect of suction catheter insertion and tracheal stimulation in adults with severe brain injury.
abstract: OBJECTIVE
  To determine the effect of suction catheter insertion and tracheal stimulation on cerebrovascular and systemic vascular status in adults with severe traumatic brain injury.
  
  
  METHODS
  Quasi-experimental, within-subject design.
  
  
  METHODS
  Two university-affiliated critical care units.
  
  
  METHODS
  Thirty intubated and mechanically ventilated adults with severe brain injury. The participants' average age was 31 +/- 15 years.
  
  
  METHODS
  Mean intracranial pressure (MICP), mean arterial pressure (MAP), cerebral perfusion pressure (CPP), and heart rate (HR) were measured.
  
  
  METHODS
  Endotracheal suction catheter insertion with tracheal stimulation was performed.
  
  
  RESULTS
  Suction catheter insertion and tracheal stimulation, isolated from other components of the suctioning procedure, significantly increased MICP, MAP, and CPP. HR was not significantly increased. During the application of negative pressure for actual suctioning, MICP and HR significantly increased, whereas MAP and CPP did not significantly change compared with catheter insertion.
  
  
  CONCLUSIONS
  Tracheal stimulation during suction catheter insertion initiates both cerebrovascular and systemic vascular responses during the suctioning procedure. Study findings suggest that a potentially productive direction for intervention research is to identify ways to minimize airway stimulation during the suctioning procedure.
authors.affiliation: University of Pittsburgh School of Nursing, Pa, USA.
authors.forename: J
authors.initials: J
authors.lastname: Brucia
authors.forename: E
authors.initials: E
authors.lastname: Rudy
mesh_terms: D000328:Adult; D001794:Blood Pressure; D001930:Brain Injuries / Q000503:physiopathology*; D005260:Female; D006339:Heart Rate; D006801:Humans; D007427:Intracranial Pressure; D007442:Intubation, Intratracheal / Q000009:adverse effects*; D008297:Male; D013396:Suction / Q000009:adverse effects*; D014132:Trachea / Q000503:physiopathology*