Acquired tracheomalacia: Detection by expiratory CT scan

被引:67
作者
Aquino, SL
Shepard, JAO
Ginns, LC
Moore, RH
Halpern, E
Grillo, HC
McLoud, TC
机构
[1] Dept Radiol, Boston, MA USA
[2] Dept Pulm & Crit Care Med, Boston, MA USA
[3] Dept Gen Thorac Surg, Boston, MA USA
关键词
trachea; computed tomography; tracheomalacia; trachial stenosis; airway obstruction; diagnosis; computer-assisted;
D O I
10.1097/00004728-200105000-00011
中图分类号
R8 [特种医学]; R445 [影像诊断学];
学科分类号
1002 ; 100207 ; 1009 ;
摘要
Purpose: The put-pose of this work was to determine whether cross-sectional area and coronal and sagittal diameter measurements of the trachea between inspiration and end-expiration on CT are significantly different between patients with acquired tracheomalacia and those without this condition. Method: Inspiratory and end-expiratory CT scans of the trachea of 23 normal patients and 10 patients with acquired tracheomalacia were analyzed. Percent changes in cross-sectional area, coronal, and sagittal diameters were calculated. Results: For patients with tracheomalacia, mean percent changes in the upper and middle trachea between inspiration and expiration were 49 and 44% : mean changes in the coronal and sagittal diameters in the upper and middle tracheal were 4 and 10% and 39 and 54%, respectively. Control group mean percent changes in the upper and middle tracheal area were 12 and 14%, respectively, and mean changes in the coronal and sagittal diameters in the upper and middle trachea were 4 and 4% and 11 and 13%, respectively. Significant differences were calculated for changes in cross-sectional area and sagittal diameter between groups (p < 10(-5)). Based on receiver operator curve analysis, a > 18% change in the upper trachea and 28% change in the midtrachea between inspiration and expiration were observed: the probability of tracheomalacia was 89-100%. The probability of tracheomalacia was > 89%, especially if the change in sagittal diameter was > 28%. Conclusion: By measuring changes in tracheal cross-sectional area and sagittal diameters between inspiratory and end-expiratory CT, a significant difference can be identified between normal patients and those with acquired tracheomalacia.
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页码:394 / 399
页数:6
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