title: [Transcutaneous carbon dioxide and oxygen measurement in patients undergoing microlaryngosurgery with high frequency jet ventilation].
abstract: BACKGROUND
  High frequency jet ventilation (HFJV) via thin tracheal tube is a convenient method of ventilation in microlaryngosurgery, but the problem of the assessment of oxygen and carbon dioxide status during HFJV is yet to be studied.
  
  
  METHODS
  Fifteen patients undergoing microlaryngosurgery under total intravenous anesthesia with HFJV were studied. The combined transcutaneous carbon dioxide (PtcCO2) and oxygen (PtcO2) levels were compared with arterial blood gas values (PaCO2, PaO2).
  
  
  RESULTS
  The PtcCO2 values demonstrated a high degree of correlation with PaCO2 before intubation (r = 0.97), during HFJV (r = 0.96), and after anesthesia (r = 0.93). The PaO2 values demonstrated a generally good correlation with PaO2 before intubation (r = 0.78) and during HFJV (r = 0.83), but not after anesthesia (r = 0.54).
  
  
  CONCLUSIONS
  Capnography values are invalid during HFJV, and an arterial catheter is not always indicated and feasible in microlaryngoscopy. The transcutaneous devices provide an effective method for non-invasive monitoring of PaCO2 in situations where continuous and precise control of CO2 levels is desired such as in perioperative period of microlaryngosurgery with HFJV.
authors.affiliation: Department of Anesthesiology, Juntendo University, Urayasu Hospital, Urayasu 279-0021.
authors.forename: Akio
authors.initials: A
authors.lastname: Mizushima
authors.forename: Akiya
authors.initials: A
authors.lastname: Nakamura
authors.forename: Yasushi
authors.initials: Y
authors.lastname: Kawauchi
authors.forename: Kunihisa
authors.initials: K
authors.lastname: Miura
authors.forename: Shinji
authors.initials: S
authors.lastname: Fujino
authors.forename: Shinobu
authors.initials: S
authors.lastname: Katashima
authors.forename: Miki
authors.initials: M
authors.lastname: Yamamoto
authors.forename: Yoichiro
authors.initials: Y
authors.lastname: Kamiyama
mesh_terms: D000328:Adult; D000368:Aged; D000771:Anesthesia, Intravenous; D001785:Blood Gas Monitoring, Transcutaneous / Q000295:instrumentation / Q000379:methods*; D006611:High-Frequency Jet Ventilation; D006801:Humans; D007442:Intubation, Intratracheal; D007830:Larynx / Q000601:surgery*; D017075:Laser Coagulation; D008866:Microsurgery; D008875:Middle Aged