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Year : 2013  |  Volume : 27  |  Issue : 2  |  Page : 134-137

Correlation between nasal nitric oxide, nasal airway resistance and atopy in patients of allergic rhinitis

Department of Respiratory Allergy and Applied Immunology, Vallabhbhai Patel Chest Institute, University of Delhi, Delhi, India

Correspondence Address:
Raj Kumar
Department of Respiratory Allergy and Applied Immunology, Vallabhbhai Patel Chest Institute, University of Delhi, Delhi - 110 007
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/0972-6691.124396

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Background: Nasal airway resistance (NAR) is dependent upon the tone of the nasal vasculature, which is regulated by endothelially derived nitric oxide (NO). Aim: The aim of this study was to investigate the relationship between nasal nitric oxide (nNO) levels, NAR and atopy in patients of allergic rhinitis (AR). Materials and Methods: The subjects were assessed for nNO levels by NIOX chemiluminescence analyzer. NAR was measured by 4-Phase-Rhinomanometry using RHINOTEST 1000. Atopy was assessed by skin prick testing against 58 common aeroallergens. Statistical Analysis: SPSS, Chicago, IL, USA, statistical package version 14 using independent sample t-test and Pearson correlation Results: In the study, 15 diagnosed cases of AR and five healthy volunteers as control were included. In the control group, the mean total NAR was 0.16 ± 0.08 kPa/l/s while in AR group mean total NAR was 0.22 ± 0.1 kPa/ l/s (P = 0.4). In AR group mean left and right NAR were 0.50 ± 0.28 kPa/l/s and 0.52 ± 0.4 kPa/l/s respectively and mean nNO levels of right and left nostrils were 291.2 ± 122.90 ppb and 251 ± 171.16 ppb (P = 0.7). No correlation was found between the left or right unilateral NAR and nNO levels, respectively. Similarly, no significant correlation of unilateral NAR and NO levels were found in the control group. Atopic AR patients had higher NAR (P = 0.001) and nNO (P = 0.06) compared with non-atopic rhinitis patients. Conclusion: In our study, AR group had higher NAR, but no correlation was found between nNO and NAR in either groups. The atopic AR patients had significantly higher NAR in comparison with non-atopic patients.

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