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Objective:To analyze the relationship of fractional exhaled nitric oxide(FeNO)levels with eosinophils(EOS), C-reactive protein(CRP), procalcitonin(PCT)levels in elderly patients with asthma-chronic obstructive pulmonary disease overlap(ACO).Methods:A retrospective study was conducted.According to the inclusion criteria, 60 elderly patients with ACO admitted in Fujian Geriatric Hospital from May 2016 to May 2019 were enrolled in the ACO group.During the same period, 60 patients with bronchial asthma were included in the asthma group, 60 patients with chronic obstructive pulmonary disease(COPD)were recruited in the COPD group, and 60 people taking health examination were included in the health group.Levels of FeNO, EOS, CRP and PCT were detected and compared between the groups.Correlations of FeNO levels with EOS and inflammatory factors were analyzed by the Spearman correlation.Results:The group with asthma alone showed the highest levels of FeNO, followed by the ACO group, the COPD group and the healthy group( F=970.235, P=0.000). The ACO group had the highest levels of EOS, CRP and PCT, followed by the COPD group, the asthma group and the healthy group( F=103.74, 76.648 and 57.042, P=0.000). Spearman bivariate correlation analysis showed that FeNO levels were positively correlated with levels of EOS, CRP and PCT in the asthma, COPD and ACO groups(the asthma group: r=0.646, 0.326 and 0.497, P=0.000, 0.014 and 0.000; the COPD group: r=0.398, 0.613 and 0.432, P=0.009, 0.000 and 0.001 the ACO group: r=0.654, 0.573 and 0.516, P=0.000, 0.000 and 0.000). Conclusions:High levels of FeNO are found in elderly patients with ACO.Levels of FeNO are positively correlated with EOS, CRP and PCT levels in peripheral blood, and can be used as a sensitive index for airway hyperinflammatory responses.
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Objective To explore the correlation between volumetric capnography(VCap)and traditional pulmonary function in chronic obstructive pulmonary disease(COPD),so as to assess whether VCap can be used as alternative indicators for the evaluation of COPD severity when some of the elderly COPD patients do not accomplish the traditional pulmonary function tests.Methods 960 patients admitted to Fujian Geriatric Hospital from June 2008 to June 2015 and undergoing pulmonary function tests were included in the study.They were divided into 2 groups of the COPD group(640 cases)and the control group(320 cases).The pulmonary function of COPD group was divided into 4 subgroups(Ⅰ~Ⅳ).All persons received tests of traditional pulmonary function and VCap.The correlations between VCap and traditional pulmonary function indexes and between VCap and COPD severity were observed.Results The differences in Vm25-50/VT,Vm50-75/VT,dC/dV3,SR23 of VCap between the 4 subgroups(COPDⅠ~COPDⅣ)and control group were statistically significant(all P0.05).The difference in CO2 max between the COPD Ⅲ group(severe or more severe group)and control group was statistically significant(t=6.91 and 4.65,all P0.555,P<0.05).The specificity of Vm25-50/VT of VCap for the diagnosis of COPD was best,but its sensitivity was poor than other indexes of VCap.The indexes with both high sensitivity and high specificity were Vm50-75/VT and dC/dV3.Conclusions When the patients with COPD manifest the mild airflow limited,Vm25-50/VT,Vm50-75/VT,dC/dV3 and SR23 of VCap are gradually increased with abnormal VCap figures when the illness progressed.The CO2max of VCap might be one of the indexes for assessing the severity of severe or more severe COPD.