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| Fältnamn | Indikatorer | Metadata |
|---|---|---|
| 000 | 02711naa a2200337 4500 | |
| 001 | oai:prod.swepub.kib.ki.se:135317776 | |
| 003 | SwePub | |
| 008 | 240701s2017 | |||||||||||000 ||eng| | |
| 024 | 7 | a http://kipublications.ki.se/Default.aspx?queryparsed=id:1353177762 URI |
| 024 | 7 | a https://doi.org/10.1183/13993003.00345-20162 DOI |
| 040 | a (SwePub)ki | |
| 041 | a engb eng | |
| 042 | 9 SwePub | |
| 072 | 7 | a ref2 swepub-contenttype |
| 072 | 7 | a art2 swepub-publicationtype |
| 100 | 1 | a Karimi, Ru Karolinska Institutet4 aut |
| 245 | 1 0 | a Differences in regional air trapping in current smokers with normal spirometry |
| 264 | c 2017-01-25 | |
| 264 | 1 | b European Respiratory Society (ERS),c 2017 |
| 520 | a We investigated regional air trapping on computed tomography in current smokers with normal spirometry. It was hypothesised that presence of regional air trapping may indicate a specific manifestation of smoking-related changes.40 current smokers, 40 patients with chronic obstructive pulmonary disease (COPD), and 40 healthy never- smokers underwent computed tomography scans. Regional air trapping was assessed on end-expiratory scans and emphysema, micronodules and bronchial wall thickening on inspiratory scans. The ratio of expiratory and inspiratory mean lung attenuation (E/I) was calculated as a measure of static (fixed) air trapping.Regional air trapping was present in 63% of current smokers, in 45% of never smokers and in 8% of COPD patients (p<0.001). Current smokers with and without regional air trapping had E/I ratio of 0.81 and 0.91, respectively (p<0.001). Forced expiratory volume in 1 s (FEV1) was significantly higher and emphysema less frequent in current smokers with regional air trapping.Current smokers with regional air trapping had higher FEV1 and less emphysema on computed tomography. In contrast, current smokers without regional air trapping resembled COPD. Our results highlight heterogeneity among smokers with normal spirometry and may contribute to early detection of smoking related structural changes in the lungs. | |
| 700 | 1 | a Tornling, Gu Karolinska Institutet4 aut |
| 700 | 1 | a Forsslund, H4 aut |
| 700 | 1 | a Mikko, M4 aut |
| 700 | 1 | a Wheelock, AMu Karolinska Institutet4 aut |
| 700 | 1 | a Nyren, S4 aut |
| 700 | 1 | a Skold, CMu Karolinska Institutet4 aut |
| 710 | 2 | a Karolinska Institutet4 org |
| 773 | 0 | t The European respiratory journald : European Respiratory Society (ERS)g 49:1q 49:1x 1399-3003x 0903-1936 |
| 856 | 4 | u https://erj.ersjournals.com/content/erj/49/1/1600345.full.pdf |
| 856 | 4 8 | u http://kipublications.ki.se/Default.aspx?queryparsed=id:135317776 |
| 856 | 4 8 | u https://doi.org/10.1183/13993003.00345-2016 |
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