Comparison of noninvasive continuous arterial waveform analysis (Nexfin) with transthoracic Doppler echocardiography for monitoring of cardiac output - 17/05/12
: Staff AnesthesiologistAbstract |
Study Objectives |
To compare the Nexfin cardiac output (CO) with the CO obtained from transthoracic Doppler echocardiography (TTE) during routine cardiac function screening.
Design |
Observational clinical study.
Setting |
Echocardiography laboratory.
Patients |
40 ASA physical status 1 and 2 patients scheduled for routine TTE examination.
Interventions |
None.
Measurements and Main Results |
In 40 patients scheduled for routine TTE examination, we obtained simultaneous CO measurements with Doppler ultrasound and derived from Nexfin blood pressure measurements. Correlation and level of agreement between Nexfin and TTE were analyzed using Pearson correlation coefficient and Bland-Altman plots. The Pearson correlation coefficient for Nexfin versus TTE was 0.68 (CI: 0.46 - 0.82, P < 0.0001). Bland-Altman analysis showed a bias of 0.51 ± 1.1 L/min and limits of agreement of -1.6 to 2.6 L/min, with a percentage error of 39%.
Conclusions |
Considering limits of precision of CO measurements with Doppler echocardiography (± 30%), the agreement between noninvasive CO measurement with the Nexfin and TTE is reasonable.
Le texte complet de cet article est disponible en PDF.Keywords : Arterial pulse contour analysis, Cardiac output, Doppler echocardiography, Method comparison, Validation studies
Plan
| ☆ | This work was performed at the Department of Cardiology of the Spaarne Hospital, Hoofddorp, The Netherlands. |
| ☆☆ | Funded by the Department of Anesthesiology of the VU University Medical Center (VUMC), Amsterdam, The Netherlands, and the Department of Cardiology of the Spaarne Hospital, Hoofddorp, The Netherlands. |
| ★ | Conflict of interest: The Nexfin monitor was provided by BMEYE, Amsterdam, The Netherlands. |
| ★★ | Financial disclosure: none. |
Vol 24 - N° 4
P. 304-309 - juin 2012 Retour au numéro
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