Impedance Cardiographya
| Autor: | Bruce E. Mount, Robert L. Vogel, Timothy W. Miller, Joseph M. Van De Water, Martin L. Dalton |
|---|---|
| Rok vydání: | 2003 |
| Předmět: |
Pulmonary and Respiratory Medicine
Cardiac output medicine.medical_specialty Previous generation medicine.diagnostic_test business.industry Critical Care and Intensive Care Medicine Impedance cardiography Coronary artery bypass surgery Internal medicine Intermethod comparison Cardiology Medicine Monitoring methods Cardiology and Cardiovascular Medicine business |
| Zdroj: | Chest. 123:2028-2033 |
| ISSN: | 0012-3692 |
| DOI: | 10.1378/chest.123.6.2028 |
| Popis: | Objective To evaluate the following: (1) the intramethod variability of impedance cardiography (ICG) cardiac output (CO) measurements via the latest generation monitor and thermodilution CO measurements (CO-TDs); (2) the intermethod comparison of ICG CO and CO-TD; and (3) comparisons of the intergeneration ICG CO equation to CO-TD, using the latest ICG CO equation, the ZMARC (CO-ICG), and the predecessor equations for measuring the ICG CO of Kubicek (CO-K), Sramek (CO-S), and Sramek-Bernstein (CO-SB). Design Prospective study. Setting A cardiovascular-thoracic surgery ICU in a community university-affiliated hospital. Patients Post-coronary artery bypass graft patients (n = 53) in whom 210 pairs of CO measurements were made. Interventions None. Measurements and main results The CO-ICG was determined simultaneously while the nurse was performing the CO-TD. Variability within the monitoring method was better for CO-ICG compared to CO-TD (6.3% vs 24.7%, respectively). The correlation, bias, and precision of the CO-ICG was good compared to CO-TD ( r 2 = 0.658; r = 0.811; bias, −0.17 L/min; precision, 1.09 L/min; CO-ICG = 1.00 × CO-TD − 0.17; p r 2 = 0.309; r = 0.556; bias, −1.71 L/min; precision, 1.81 L/min; CO-K = 0.78 × CO-TD − 0.45; p r 2 = 0.361; r = 0.601; bias, −1.46 L/min; precision, 1.63 L/min; CO-S = 0.80 × CO-TD − 0.36; p r 2 = 0.469; r = 0.685; bias, −0.77 L/min; precision, 1.69 L/min; CO-SB = 1.03 × CO-TD − 0.95; p Conclusion The latest ICG technology for determining CO (CO-ICG) is less variable and more reproducible in an intrapatient sense than is CO-TD, it is equivalent to the average accepted CO-TD in post-coronary artery bypass graft patients, and showed marked improvement in agreement with CO-TD compared to measurements made using previous generation ICG CO equations. |
| Databáze: | OpenAIRE |
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