title: Laboratory evaluation of the vital signs (ICOR) piezoelectric anesthetic agent analyzer.
abstract: The Vital Signs (ICOR) anesthetic agent analyzer, which measures anesthetic vapor concentration by a piezoelectric crystal technique, was evaluated by using standard-calibration gases to measure the accuracy, response time, gas interference, and water vapor dependence of the analyzer. The accuracy for the measurement of vapor concentration was better than 0.08 vol%. The reproducibility of repeated measures averaged 0.003 vol%. The offsets caused by other gases were 0.02 vol% for water vapor, 0.08 vol% for 70% nitrous oxide, and less than 0.01 vol% for oxygen and carbon dioxide. Response time (10 to 90%) was 475 ms. The agent analyzer may be well suited for monitoring volatile agent concentrations during anesthesia.
authors.affiliation: Department of Anesthesiology, University of Utah, Salt Lake City 84132.
authors.forename: D R
authors.initials: DR
authors.lastname: Westenskow
authors.forename: F H
authors.initials: FH
authors.lastname: Silva
mesh_terms: D000769:Anesthesia, Inhalation / Q000295:instrumentation*; D000777:Anesthetics / Q000032:analysis*; D002138:Calibration; D002245:Carbon Dioxide / Q000032:analysis; D004563:Electrochemistry / Q000295:instrumentation; D004737:Enflurane / Q000032:analysis; D005069:Evaluation Studies as Topic; D006221:Halothane / Q000032:analysis; D006801:Humans; D007530:Isoflurane / Q000032:analysis; D008991:Monitoring, Physiologic / Q000295:instrumentation*; D009609:Nitrous Oxide / Q000032:analysis; D010100:Oxygen / Q000032:analysis; D015203:Reproducibility of Results; D012212:Rheology; D013997:Time Factors; D014835:Volatilization; D014867:Water / Q000032:analysis
chemical_list: D000777:Anesthetics; D014867:Water; D002245:Carbon Dioxide; D004737:Enflurane; D007530:Isoflurane; D009609:Nitrous Oxide; D010100:Oxygen; D006221:Halothane