title: Oximeter's acquisition parameter influences the profile of respiratory disturbances.
abstract: OBJECTIVE
  Pulse oximetry (Sp02) is a key parameter monitored during polysomnographic studies, and different acquisition settings can be employed to obtain this data. The purpose of this study was to determine if the use of different settings would significantly influence scoring of respiratory disturbance events (RDE).
  
  
  METHODS
  Prospective study
  
  
  METHODS
  Sleep Disorders Center - community
  
  
  METHODS
  30 patients had three identical oximeters simultaneously attached to the digits during polysomnography, each placed in a different recording setting: 3, 6 and 12 seconds.
  
  
  METHODS
  None.
  
  
  METHODS
  RDEs were identified by changes in snoring and flow then sub-categorized as RDE0, RDE1-2 and/or RDE3 if less than 1%, greater than 1 but less than 3%, and 3% or greater oxyhemoglobin desaturation occurred. Each event was given three labels according to the level of desaturation seen on each oximetry tracing.
  
  
  RESULTS
  Significant differences in the mean frequency of RDE types at each recording setting were noted (p < .001). A survey of sleep practitioners revealed changes in clinical behavior when presented examples of such differences.
  
  
  CONCLUSIONS
  These data confirm the impact of different oximetric recording settings on the profile of RDEs and the importance of reporting such acquisition settings in studies of sleep disordered breathing.
authors.affiliation: Baptist Health Medical Center-Little Rock, Sleep Disorders Center, AR 72205-7299, USA. dgdavila@baptist-health.org
authors.forename: David G
authors.initials: DG
authors.lastname: Davila
authors.forename: Kathy C
authors.initials: KC
authors.lastname: Richards
authors.forename: Buddy L
authors.initials: BL
authors.lastname: Marshall
authors.forename: Patricia S
authors.initials: PS
authors.lastname: O'Sullivan
authors.forename: Leah A
authors.initials: LA
authors.lastname: Osbahr
authors.forename: Regina B
authors.initials: RB
authors.lastname: Huddleston
authors.forename: Jay C
authors.initials: JC
authors.lastname: Jordan
mesh_terms: D004569:Electroencephalography; D004576:Electromyography / Q000295:instrumentation; D004585:Electrooculography / Q000295:instrumentation; D006801:Humans; D010092:Oximetry / Q000295:instrumentation*; D017286:Polysomnography / Q000295:instrumentation; D011175:Positive-Pressure Respiration / Q000379:methods; D011446:Prospective Studies; D012720:Severity of Illness Index; D012891:Sleep Apnea Syndromes / Q000175:diagnosis* / Q000628:therapy; D013997:Time Factors