|
KMID : 1195620150080020161
|
|
Clinical and Experimental Otorhinolaryngology
2015 Volume.8 No. 2 p.161 ~ p.166
|
|
|
Changes in the Flow-Volume Curve According to the Degree of Stenosis in Patients With Unilateral Main Bronchial Stenosis
|
|
Ko You-Sang
Yoo Jung-Geun
Yi Chin-A
Lee Kyung-Soo
Jeon Kyeong-Man
Um Sang-Won
Koh Won-Jung
Suh Gee-Young
Chung Man-Pyo
Kwon O-Jung
Kim Ho-Joong
|
|
|
Abstract
|
|
|
Objectives: The shape of the flow-volume (F-V) curve is known to change to showing a prominent plateau as stenosis progresses in patients with tracheal stenosis. However, no study has evaluated changes in the F-V curve according to the degree of bronchial stenosis in patients with unilateral main bronchial stenosis.
Methods: We performed an analysis of F-V curves in 29 patients with unilateral bronchial stenosis with the aid of a graphic digitizer between January 2005 and December 2011.
Results: The primary diseases causing unilateral main bronchial stenosis were endobronchial tuberculosis (86%), followed by benign bronchial tumor (10%), and carcinoid (3%). All unilateral main bronchial stenoses were classified into one of five grades (I, ≤25%; II, 26%-50%; III, 51%-75%; IV, 76%-90%; V, >90% to near-complete obstruction without ipsilateral lung collapse). A monophasic F-V curve was observed in patients with grade I stenosis and biphasic curves were observed for grade II-IV stenosis. Both monophasic (81%) and biphasic shapes (18%) were observed in grade V stenosis. After standardization of the biphasic shape of the F-V curve, the breakpoints of the biphasic curve moved in the direction of high volume (x-axis) and low flow (y-axis) according to the progression of stenosis.
Conclusion: In unilateral bronchial stenosis, a biphasic F-V curve appeared when bronchial stenosis was >25% and disappeared when obstruction was near complete. In addition, the breakpoint moved in the direction of high volume and low flow with the progression of stenosis.
|
|
|
KEYWORD
|
|
|
Maximal Expiratory Flow-Volume Curves, Spirometry, Bronchi
|
|
|
FullTexts / Linksout information
|
|
|
|
|
Listed journal information
|
|
   
|