학술논문
Influence of patent ductus arteriosus and ventilators on electrical velocimetry for measuring cardiac output in very-low/low birth weight infants.
Document Type
Article
Author
Source
Subject
*ANALYSIS of variance
*ARTIFICIAL respiration
*LOW birth weight
*CARDIAC output
*ECHOCARDIOGRAPHY
*LONGITUDINAL method
*PATENT ductus arteriosus
*DATA analysis software
*DESCRIPTIVE statistics
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Language
ISSN
0743-8346
Abstract
Objective:We evaluated electrical velocimetry, a noninvasive method for continuous cardiac output measurement, in very-low and low birth weight infants and the influence of patent ductus arteriosus (PDA) and ventilators on this method.Study design:This prospective study compared 81 pairs of simultaneous cardiac output measurements by electrical velocimetry and transthoracic echocardiography in 28 patients. Data were compared by correlation, Bland-Altman analysis and two-way analysis of variance.Results:The two methods exhibited a high correlation (r=0.859, P<0.0001). The bias (mean difference of the methods) and percent error (100 × 1.96 × s.d./mean cardiac output) were −6 ml min−1 and 29.2%, respectively. PDA significantly affected the bias (P=0.0004), but ventilators did not (P=0.14). Hemodynamically significant PDA had a larger bias (−36 ml min−1) and higher percent error (38.6%).Conclusions:Although influenced by PDA, electrical velocimetry was generally interchangeable with transthoracic echocardiography even using ventilators. [ABSTRACT FROM AUTHOR]