title: Clinical evaluation of the CDI-100 in-line hematocrit/saturation monitor.
abstract: This study was undertaken to evaluate the accuracy, reliability, consistency and biases of the CDI-100 saturation monitor when compared with a blood gas analyzer. The advantage of continuous in-line monitoring is that the perfusionist has continuous updates as to the patient's changing physiologic state. During this study, if the sample readout of the CDI-100 was off by greater than 10% from that of the Gem-Premier, the CDI-100 parameter was recalibrated. The accuracy of the CDI-100 was fair (greater than 10% of the samples needed recalibration) with regards to the initial sample comparisons. Recalibration was needed 67% of the time for the hematocrit and 35% for the saturation. The reliability of the CDI-100 was good (no equipment failure). The CDI-100 was consistent. It consistently overestimated both the hematocrit and saturation. This overestimation is the bias of the monitor. We recommend recalibration of the CDI-100 during clinical use to insure greater accuracy.
authors.affiliation: Memorial Medical Center, Department of Surgery, Modesto, CA 95355, USA.
authors.forename: H G
authors.initials: HG
authors.lastname: Walton
authors.forename: D
authors.initials: D
authors.lastname: Boucher
authors.forename: D
authors.initials: D
authors.lastname: Linne
mesh_terms: D000368:Aged; D015982:Bias; D001784:Blood Gas Analysis / Q000295:instrumentation*; D002138:Calibration; D006348:Cardiac Surgical Procedures; D005260:Female; D006400:Hematocrit / Q000295:instrumentation*; D006801:Humans; D008297:Male; D008875:Middle Aged; D016343:Monitoring, Intraoperative / Q000295:instrumentation*; D015203:Reproducibility of Results; D013997:Time Factors