Continuous non-invasive cardiac output measurements in the neonate by electrical velocimetry: a comparison with echocardiography
| Autor: | Shahab Noori, Istvan Seri, Benazir Drabu, Sadaf Soleymani |
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| Rok vydání: | 2012 |
| Předmět: |
Male
medicine.medical_specialty Cardiac output Electrical cardiometry Critical Illness Ventricular Function Left Mean difference Ductus arteriosus medicine Humans In patient Prospective Studies Cardiac Output Monitoring Physiologic business.industry Non invasive Infant Newborn Obstetrics and Gynecology General Medicine Velocimetry Term neonates medicine.anatomical_structure Echocardiography Pediatrics Perinatology and Child Health Female Radiology Rheology business Nuclear medicine Infant Premature |
| Zdroj: | Archives of Disease in Childhood - Fetal and Neonatal Edition. 97:F340-F343 |
| ISSN: | 1468-2052 1359-2998 |
| DOI: | 10.1136/fetalneonatal-2011-301090 |
| Popis: | Objective Electrical velocimetry (EV) is a noninvasive method of continuous left cardiac output monitoring based on measurement of thoracic electrical bioimpedance. The objective was to validate EV by investigating the agreement in cardiac output measurements performed by EV and echocardiography. Design In this prospective observational study, left ventricular output (LVO) was simultaneously measured by EV (LVO ev ) using Aesculon and by echocardiography (LVO echo ) in healthy term neonates during the fi rst 2 postnatal days. To determine the agreement between the two methods, we calculated the bias (mean difference) and precision (1.96◊SD of the difference). As LVO echo has its own limitations, the authors also calculated the ‘true precision’ of EV adjusted for echocardiography as the reference method. Results The authors performed 115 paired measurements in 20 neonates. LVO ev and LVO echo were similar (534±105 vs 538±105 ml/min, p=0.7). The bias and precision of EV were 4 and 234 ml/min, respectively. The authors found the true precision of EV to be similar to the precision of echocardiography (31.6% vs 30%, respectively). There was no difference in bias and precision between the measurements obtained in patients with or without a haemodynamically signifi cant patent ductus arteriosus. Conclusions EV is as accurate in measuring LVO as echocardiography and the variation in the agreement between EV and echocardiography among the individual subjects refl ects the limitations of both techniques. |
| Databáze: | OpenAIRE |
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