title: Continuous end-tidal carbon dioxide monitoring during normofrequent jet-ventilation.
abstract: BACKGROUND
  Continuous end-tidal carbon dioxide (ETCO2) monitoring during normofrequent jet-ventilation (NFJV) has not previously been successful and no correspondence between ETCO2 and arterial carbon dioxide (PaCO2) demonstrated.
  
  
  METHODS
  During NFJV jet-ventilation in 19 healthy volunteers, continuous ETCO2 was measured and compared to PaCO2 values. The original ETCO2 sampling line from our Datex CO2 measuring equipment was placed longitudinally against a suction catheter and both were wrapped with aluminium foil. They were placed 4-5 cm above the carina and the position was verified with a fiberoptic bronchoscope.
  
  
  RESULTS
  The correlation between methods gave a Pearson's product moment correlation (r value) of 0.836, significant at the P < 0.001 level, indicating a close correlation between methods. A difference against mean scatter diagram confirmed that ETCO2 and PaCO2 measurements are of equal value in monitoring healthy patients during NFJV.
  
  
  CONCLUSIONS
  A valuable method of continuous ETCO2 monitoring during NFJV is presented.
authors.affiliation: Department of Anaesthesiology, Viborg Hospital, Denmark.
authors.forename: L F
authors.initials: LF
authors.lastname: Bach
authors.forename: H
authors.initials: H
authors.lastname: Wanner-Olsen
authors.forename: B N
authors.initials: BN
authors.lastname: Andersen
authors.forename: I K
authors.initials: IK
authors.lastname: Madsen
authors.forename: S
authors.initials: S
authors.lastname: Kruse
mesh_terms: D000328:Adult; D002245:Carbon Dioxide / Q000032:analysis*; D006801:Humans; D016343:Monitoring, Intraoperative; D012121:Respiration, Artificial
chemical_list: D002245:Carbon Dioxide