title: Percutaneous tracheostomy in neurosurgical patients with intracranial pressure monitoring is safe.
abstract: BACKGROUND
  Percutaneous tracheostomy (PT) is performed routinely on neurosurgical patients in many critical care units. Some of these patients suffer from severe brain injury and require intracranial pressure (ICP) monitoring. It remains uncertain whether this procedure causes an increase in ICP or jeopardizes the cerebral perfusion pressure (CPP) in these patients. We studied the effects of PT on ICP and CPP in this group of patients.
  
  
  METHODS
  Our study group consisted of 52 neurosurgical patients in the surgical intensive care unit of an urban, Level I Trauma Center who had ICP monitoring and underwent PT between 2001 and 2005. Data were collected from 24 hours before to 24 hours after PT. ICP, CPP, and Glasgow Coma Score (GCS) scale were measured hourly during the study period.
  
  
  RESULTS
  There was no statistically significant change in the mean ICP over the 48-hour study period or after the procedure. There was a temporary increase in ICP during the procedure (1.60 mm Hg) which was statistically not significant. There was statistically significant increase in the mean CPP after the procedure, although this increase was clinically not significant. The risk of having a critically high ICP (>20 mm Hg) or low CPP (<60 mm Hg) values did not increase after the procedure. There was no significant change in GCS after the procedure.
  
  
  CONCLUSIONS
  PT in neurosurgical patients with ICP monitor does not cause clinically significant or hazardous changes in ICP, CPP, and GCS. We therefore consider PT to be safe in neurosurgical patients.
authors.affiliation: Department of Surgery, Cedars-Sinai Medical Center, Los Angeles, California, USA.
authors.forename: Siamak
authors.initials: S
authors.lastname: Milanchi
authors.forename: David
authors.initials: D
authors.lastname: Magner
authors.forename: Matthew T
authors.initials: MT
authors.lastname: Wilson
authors.forename: James
authors.initials: J
authors.lastname: Mirocha
authors.forename: Daniel R
authors.initials: DR
authors.lastname: Margulies
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001927:Brain Diseases / Q000503:physiopathology* / Q000601:surgery*; D002560:Cerebrovascular Circulation / Q000502:physiology*; D015331:Cohort Studies; D003422:Critical Care; D005260:Female; D015600:Glasgow Coma Scale; D006801:Humans; D007427:Intracranial Pressure / Q000502:physiology*; D008297:Male; D008875:Middle Aged; D008991:Monitoring, Physiologic; D012189:Retrospective Studies; D014139:Tracheostomy