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Precision of cerebral oxygenation and hemoglobin concentration measurements in neonates measured by near-infrared spectroscopy.
MedLine Citation:
PMID:  21529095     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
Background and aim: One source of error with near-infrared spectroscopy (NIRS) is the assumption that the measured tissue is optically homogeneous. This is not always the case. Our aim is to assess the impact of tissue homogeneity (TH) on the precision of NIRS measurements in neonates. Methods: On 36 term and 27 preterm neonates at least five 1-min measurements are performed on each subject using the OxiplexTS. The sensor position is slightly changed before each measurement while assessing TH. The precision for cerebral tissue oxygenation saturation (StO(2)) and total hemoglobin concentration (tHb) are calculated by repeated measures analysis of variance. Results: The mean StO(2) is not significantly different between term and preterm infants. The mean tHb is significantly lower in preterm infants (p < 0.01). With increasing TH, the precision of StO(2) increase from 5.6 to 4.6% for preterm and from 11.0 to 2.0% for term infants; the precision of tHb increases from 10.1 to 7.5μM for preterm and from 16.4 to 3.5μM for term infants. The precision for StO(2) is higher in term than in preterm infants. The precision for tHb shows no significant difference between the two groups. Conclusions: The precision of NIRS measurements correlates with tissue homogeneity.
Authors:
Sandra Jasminder Arri; Thomas Muehlemann; Martin Biallas; Hans Ulrich Bucher; Martin Wolf
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of biomedical optics     Volume:  16     ISSN:  1560-2281     ISO Abbreviation:  J Biomed Opt     Publication Date:  2011 Apr 
Date Detail:
Created Date:  2011-05-02     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9605853     Medline TA:  J Biomed Opt     Country:  United States    
Other Details:
Languages:  eng     Pagination:  047005     Citation Subset:  IM    
Affiliation:
University Hospital Zurich, Clinic of Neonatology, Department of Obstetrics and Gynecology, Frauenklinikstrasse 10, 8091 Zurich, SwitzerlandETH and University of Zurich, Zurich, Switzerland.
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