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Indian Pediatrics

, Volume 51, Issue 2, pp 105–111 | Cite as

Fractional exhaled nitric oxide in children with acute exacerbation of asthma

  • Dinesh Raj
  • Rakesh LodhaEmail author
  • Aparna Mukherjee
  • Tavpritesh Sethi
  • Anurag Agrawal
  • Sushil Kumar Kabra
Research Paper

Abstract

Objective

To determine whether fractional exhaled nitric oxide (FENO) has a utility as a diagnostic or predictive maker in acute exacerbations of asthma in children.

Design

Analysis of data collected in a pediatric asthma cohort.

Setting

Pediatric Chest Clinic of a tertiary care hospital

Methods

A cohort of children with asthma was followed up every 3 months in addition to any acute exacerbation visits. Pulmonary function tests (PFT) and FENO were obtained at all visits. We compared the FENO values during acute exacerbations with those at baseline and those during the follow up.

Results

243 asthmatic children were enrolled from August 2009 to December 2011 [mean (SD) follow up — 434 (227) days]. FENO during acute exacerbations was not different from FENO during follow up; however, FENO was significantly higher than personal best FENO during follow up (P < 0.0001). FENO during acute exacerbation did not correlate with the severity of acute exacerbation (P=0.29). The receiver operating characteristics curve for FENO as a marker for acute exacerbation had an area under the curve of 0.59. Cut-off of 20 ppb had a poor sensitivity (44%) and specificity (68.7%) for acute exacerbation.

Conclusions

FENO levels during acute exacerbation increase from their personal best levels. However, no particular cut off could be identified that could help in either diagnosing acute exacerbation or predicting its severity.

Keywords

Acute exacerbation Asthma FENO Nitric oxide 

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Copyright information

© Indian Academy of Pediatrics 2014

Authors and Affiliations

  • Dinesh Raj
    • 1
  • Rakesh Lodha
    • 1
    • 3
    Email author
  • Aparna Mukherjee
    • 1
  • Tavpritesh Sethi
    • 1
  • Anurag Agrawal
    • 2
  • Sushil Kumar Kabra
    • 1
  1. 1.Division of Pediatric Pulmonology, Department of PediatricsAll India Institute of Medical SciencesAnsari Nagar, New DelhiIndia
  2. 2.Molecular ImmunogeneticsCSIR-Institute of Genomics and Integrative BiologyNew DelhiIndia
  3. 3.Department of PediatricsAll India Institute of Medical SciencesAnsari Nagar, New DelhiIndia

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