Dynamic Airway Narrowing
著者
Kurosawa Hajime, Kohzuki Masahiro
journal or
publication title
New England Journal of Medicine
volume
350
number
10
page range
1036-1036
year
2004
i m a g e s i n c l i n i c a l m e d i c i n e
The n e w e n g l a n d j o u r n a l of m e d i c i n e
n engl j med 350;10 www.nejm.org march 4, 2004
1036
Dynamic Airway Narrowing
Hajime Kurosawa, M.D. Masahiro Kohzuki, M.D.
Tohoku University Graduate School of Medicine Sendai 980-8574, Japan
61-year-old man who reported progressive exertional dys-pnea of 12 years’ duration received a diagnosis of chronic obstructive pulmo-nary disease on the basis of a 150-pack-year history of smoking, emphysema on radiographic evaluation, and a forced expiratory volume in one second of 0.72 liter (28.8 percent of the predicted value). An upper thoracic high-speed electron-beam com-puted tomographic scan showed small airways (approximately 3 mm in diameter) that were open during inspiration (Panel A, arrows) but extremely narrow during expira-tion (Panel B, arrows). Dynamic narrowing of the airways is common in patients with chronic obstructive pulmonary disease and is caused by the loss of pulmonary elastic recoil, which would otherwise tether the airways open.
Copyright © 2004 Massachusetts Medical Society.
a
A B
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