Head and Neck
Granulation formation following tracheal stenosis stenting: Influence of stent position
Article first published online: 17 AUG 2009
Copyright © 2009 The American Laryngological, Rhinological, and Otological Society, Inc.
Volume 119, Issue 12, pages 2331–2336, December 2009
How to Cite
Ko, P.-J., Liu, C.-Y., Wu, Y.-C., Chao, Y.-K., Hsieh, M.-J., Wu, C.-Y., Wang, C.-J., Liu, Y.-H. and Liu, H.-P. (2009), Granulation formation following tracheal stenosis stenting: Influence of stent position. The Laryngoscope, 119: 2331–2336. doi: 10.1002/lary.20615
- Issue published online: 20 NOV 2009
- Article first published online: 17 AUG 2009
- Manuscript Accepted: 4 JUN 2009
- National Science Council of the Republic of China, Taiwan. Grant Numbers: NSC 94-2314-B-182A-190, 95-2314-B-182A-018
- Chang-Gung Memorial Hospital. Grant Numbers: CMRP-32113, 350121
- Tracheal stent;
- granulation formation;
- stent-to-vocal fold distance
To determine whether stent-to-vocal fold distance influences morbidity following stent placement for tracheal stenosis.
Fifty-five stent procedures (46 Montgomery T-tube [Boston Medical Products, Westborough, MA] and 9 Dumon stents [Novatech, Grasse, France]) were performed in 40 patients enrolled in this study.
The most common complication of stenting for tracheal stenosis was granulation (23 procedures, 41.82%). Of 43 procedures where the stent upper edge was located at or below the vocal folds, granulation occurred in 21 procedures (48.84%). Of 12 procedures where the stent edge was located above the vocal fold, granulation occurred in two procedures, or 16.67% (odds ratio = 4.773, P = .0458, χ2 test). Among patients in whom the stent edge was located at or below the vocal folds, the granulation complication rate was higher in those with a stent-to-vocal fold distance of <10 mm. Multivariate analysis revealed that the stent-to-vocal fold distance independently predicted granulation formation; an inverse correlation was identified between stent-to-vocal fold distance and granulation severity (n = 43, r = −.501, P = .0006; Spearman ranking test). Receiver operating characteristic curve analysis further demonstrated that a stent-to-vocal fold distance cutoff value between 9.5 and 11 mm had the best accuracy in predicting granulation formation.
A stent-to-vocal fold distance of 10 mm was found to be a critical distance for discriminating granulation formation. Optimal stent-to-vocal fold distance should routinely be evaluated before stent placement. Laryngoscope, 2009