title: StatPal II pH and Blood Gas Analysis System evaluated.
abstract: We evaluated a new portable instrument, the PPG StatPal II pH and Blood Gas Analysis System, designed for "point-of-care" measurements of blood gases and pH. Inaccuracy (% of target value) and imprecision (CV%) were assessed by blood tonometry and comparison with a Corning 178. Within-day results for PCO2 inaccuracy and imprecision ranged from 98.2% to 102.9% and 3.3% to 3.9%, respectively; for PO2, these were 95.5% to 102.3% and 2.3% to 3.0%, respectively. Between-day results for PCO2 inaccuracy and imprecision ranged from 99.2% to 99.3% and from 2.9% to 3.2%, respectively; for PO2, the ranges were 96.2% to 98.2% and 2.6% to 3.0%, respectively. Two PCO2 outliers (in 645 samples = 0.3%) were observed. In general, tonometry recovery, measurement stability, and pH bias results for the StatPal II and Corning 178 were comparable. We conclude that the StatPal II performs within acceptable ranges of inaccuracy and imprecision.
authors.affiliation: Stanford University Hospital, Division of Pulmonary and Critical Care Medicine, Department of Pulmonary Physiology, CA 94305.
authors.forename: R J
authors.initials: RJ
authors.lastname: Wong
authors.forename: J J
authors.initials: JJ
authors.lastname: Mahoney
authors.forename: J A
authors.initials: JA
authors.lastname: Harvey
authors.forename: A L
authors.initials: AL
authors.lastname: Van Kessel
mesh_terms: D001769:Blood; D001784:Blood Gas Analysis / Q000295:instrumentation* / Q000706:statistics & numerical data; D002245:Carbon Dioxide / Q000097:blood; D004355:Drug Stability; D006801:Humans; D006863:Hydrogen-Ion Concentration; D010100:Oxygen / Q000097:blood; D012680:Sensitivity and Specificity; D013696:Temperature
chemical_list: D002245:Carbon Dioxide; D010100:Oxygen