• Department of Pulmonary and Critical Care Medicine, China-Japan Friendship Hospital, Beijing 100029, P. R. China;
LIN Jiangtao, Email: jiangtao_l@263.net
Export PDF Favorites Scan Get Citation

ObjectiveTo evaluates the values of fractional exhaled nitric oxide (FENO) in the treatment of chronic cough prospectively.MethodsSubjects with chronic cough were recruited from the outpatient clinic of China-Japan Friendship Hospital. All the patients accepted FENO tests, sputum cell counts, pulmonary function tests, bronchial provocation tests, serum IgE, cough symptom scores and Leicester Cough Questionnaire before and after treatment of 4 weeks.ResultsThere were 29 patients with cough variant asthma (CVA), 19 patients with eosinophilic bronchitis (EB) and 39 patients with other causes. The baseline FENO level of the subjects whose coughs were relieved after inhaled corticosteroids (ICS) therapy of 4 weeks was (63±42) ppb, significantly higher than those with bad-response [(28±13) ppb, P<0.01]. The proportion of FENO decrease after ICS therapy was not only significantly related to the proportion of eosinophilic decrease (r=0.54, P<0.01), but also significantly related to the proportion of decrease of cough symptom scores (r=0.48, P<0.01). To distinguish the good responders from bad responders, the optimal baseline FENO cutoff value was 36 ppb, with sensitivity of 82%, specificity of 93%, positive predictive value of 94%, negative predictive value of 87%, accuracy of 83%.ConclusionsThere is a good relationship between the FENO decreasing levels after ICS therapy and the reliefs of cough symptoms in the CVA and EB patients. Chronic cough patients with FENO value more than 36 ppb are indicated to respond to ICS therapy.

Citation: ZHANG Yongming, LIN Jiangtao. The values of fractional exhaled nitric oxide in the treatment of chronic cough. Chinese Journal of Respiratory and Critical Care Medicine, 2018, 17(3): 267-270. doi: 10.7507/1671-6205.201805035 Copy

  • Previous Article

    Influence of different withdrawal time of trachea cannula on percutaneous dilational tracheostomy in critically ill patients
  • Next Article

    Clinical analysis of the pulse oxygen saturation and hemoglobin content of the native high-altitude Tibetans