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| Injury of grade 4~7 bronchi in the young and middle-aged cigarette smoking people without symptom: evaluation by HRCT |
| XU Xiao-jie, LU Hui-qun, YE Xiang-yang, YE Bo, ZHOU Wei, CAI Hang-mei |
| Department of Radiology, Taixing People’s Hospital Affiliated to Yangzhou University, Taixing Jiangsu 225400, China |
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Abstract Objective: To compare the size of small airway evaluated by HRCT between young and middle-aged cigarette smokers without symptom and control group. Method: The outside diameter(DE) and inner diameter(DL) of grade 4~7 bronchi in apical segment of right upper lobe were measured in cigarette smokers without symptom and control group. The ratio of the thickness of the airway(T) and square root of surface area(√BSA), ratio of airway area and total area of the airway(WA%), and ratio of bronchi wall thickness and outer diameter(TDR) were calculated. Results: The T/√BSA in grade 4~7 bronchi in apical segment of right upper lobe was higher in cigarette smokers without symptom than that of control group, with statistical difference(P<0.05). WA% was lower, which was statistically significant(P<0.05). While TDR was slightly lower, without statistical difference(P>0.05). Conclusion: HRCT can be used to assess early damage in small airway of cigarette smokers.
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Received: 10 March 2016
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