Document Detail

Comparison of single-breath and tidal breathing exhaled nitric oxide levels in infants.
MedLine Citation:
PMID:  15065823     Owner:  NLM     Status:  MEDLINE    
The aim of this study was to compare two different methods, tidal breathing (TB) and single-breath (SB), for measuring fractional exhaled nitric oxide (FENO) in infants. FENO was measured in 71 infants with either recurrent wheeze (n=32), recurrent cough (n=16) or no symptoms (healthy, n=23) using both methods. For TB measurements five breaths were collected into a gas sampling bag (off-line reservoir sampling). The SB method was modified from the raised volume rapid thoraco-abdominal technique. Agreement between the two methods was investigated and both methods were used to compare FENO in infants with and without symptoms. Flow dependence of SB FENO was demonstrated using two expiratory flows (11 and 40 mL x s(-1)). There was a moderate correlation (r=0.60) but poor agreement between levels using the TB and SB methods. A significant difference in FENO between healthy children and children with wheeze was found using the SB but not the TB method. Due to lower expiratory flow and reduced nasal nitric oxide contamination the single-breath technique may be more sensitive than the tidal breathing method for detecting differences in exhaled nitric oxide between infants with and without respiratory symptoms.
P J Franklin; S W Turner; R C Mutch; S M Stick
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  The European respiratory journal     Volume:  23     ISSN:  0903-1936     ISO Abbreviation:  Eur. Respir. J.     Publication Date:  2004 Mar 
Date Detail:
Created Date:  2004-04-06     Completed Date:  2004-06-17     Revised Date:  2013-05-23    
Medline Journal Info:
Nlm Unique ID:  8803460     Medline TA:  Eur Respir J     Country:  Denmark    
Other Details:
Languages:  eng     Pagination:  369-72     Citation Subset:  IM    
School of Paediatrics and Child Health, University of Western Australia, Perth, Australia.
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MeSH Terms
Breath Tests / methods*
Case-Control Studies
Nitric Oxide / analysis*
Respiratory Sounds*
Reg. No./Substance:
10102-43-9/Nitric Oxide

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