title: Timing of hemodynamic pressure measurements on derived hemodynamic parameters.
abstract: The purpose of this study was to examine the difference between hemodynamic pressures and parameters obtained pre- compared to post-thermodilution CO measurements. A repeated measures within subject design was conducted with a cardiac surgical cohort. Three measures of hemodynamic pressures and parameters were determined pre- and post-CO measurements (Set 1) and repeated in 30 minutes (Set 2). The sequence was duplicated in four hours (Sets 3 and 4). Hemodynamic pressures lower pre-CO were PAS at Sets 1 and 3, and SBP, DBP, and MAP at Set 3. Hemodynamic parameters lower pre-CO were PVRI at Set 1 and SVRI at Set 3. These pre-post CO differences did not vary by greater than 10%. As the CO injectate volume had minimal effect, hemodynamic pressures may be obtained pre- or post-CO to derive hemodynamic parameters.
authors.affiliation: Cardiac Sciences Program, University of Alberta Hospital, Edmonton, Alberta.
authors.forename: Gayle
authors.initials: G
authors.lastname: Urquhart
authors.forename: Louise
authors.initials: L
authors.lastname: Jensen
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001795:Blood Pressure Determination / Q000379:methods* / Q000451:nursing / Q000592:standards; D002302:Cardiac Output; D006348:Cardiac Surgical Procedures; D003422:Critical Care / Q000379:methods; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D008991:Monitoring, Physiologic / Q000379:methods* / Q000451:nursing / Q000592:standards; D009200:Myocardial Contraction; D015403:Nursing Evaluation Research; D011182:Postoperative Care / Q000379:methods / Q000451:nursing / Q000592:standards; D013318:Stroke Volume; D013815:Thermodilution / Q000379:methods* / Q000451:nursing / Q000592:standards; D013997:Time Factors; D014655:Vascular Resistance