Preoperative and postoperative agreement in fat free mass (FFM) between bioelectrical impedance spectroscopy (BIS) and dual-energy X-ray absorptiometry (DXA) in patients undergoing cardiac surgery

Summary Background & aims To measure undernutrition in terms of fat free mass (FFM), there are several options. The aim of this study was to assess agreement in FFM between the portable, bedside bioelectrical impedance spectrometry (BIS) and relatively expensive, non-portable dual-energy X-ray a...

Full description

Saved in:
Bibliographic Details
Published inClinical nutrition (Edinburgh, Scotland) Vol. 29; no. 6; pp. 789 - 794
Main Authors van Venrooij, Lenny M.W, Verberne, Hein J, de Vos, Rien, Borgmeijer-Hoelen, Mieke M.M.J, van Leeuwen, Paul A.M, de Mol, Bas A.J.M
Format Journal Article
LanguageEnglish
Published Kidlington Elsevier Ltd 01.12.2010
Elsevier
Subjects
CRP
FFM
BW
WL
DXA
BIS
ECW
ICW
Online AccessGet full text

Cover

Loading…
More Information
Summary:Summary Background & aims To measure undernutrition in terms of fat free mass (FFM), there are several options. The aim of this study was to assess agreement in FFM between the portable, bedside bioelectrical impedance spectrometry (BIS) and relatively expensive, non-portable dual-energy X-ray absorptiometry (DXA) in patients undergoing cardiac surgery. Methods In a prospective study, body composition measurements by BIS and DXA were performed two weeks prior and two months after cardiac surgery. Preoperative and postoperative agreement in FFM between BIS and DXA were analyzed with Bland and Altman plots. Results Twenty-six patients were analyzed. BIS overestimated preoperative and postoperative FFM by 2 kg compared to DXA (2.3 kg (95%CI: −3.5–8.1 kg) and 2.1 kg (95%CI: −4.5–8.7 kg), respectively). BIS underestimated FFM change by −0.5% (95%CI: −8.4–7.5%). Conclusions There is a large inter-individual variation between BIS and DXA. This hinders the interchange-ability of BIS and DXA in routine clinical practice and may lead to misclassifications and thereby inappropriate nutritional treatment and possible postoperative complications. To evaluate nutritional therapy in patients undergoing cardiac surgery, we advocate the use of DXA assessed FFM in parallel to BIS assessed extracellular and intracellular water and FFM.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:0261-5614
1532-1983
DOI:10.1016/j.clnu.2010.06.002