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. 2023 Oct 9;38(39):e308.
doi: 10.3346/jkms.2023.38.e308.

Clinical Factors for Successful Removal of Airway Silicone Stents in Patients With Post-Tuberculosis Tracheobronchial Stenosis

Bo-Guen Kim  1 , Byeong-Ho Jeong  2 , Hojoong Kim  3
Affiliations

Clinical Factors for Successful Removal of Airway Silicone Stents in Patients With Post-Tuberculosis Tracheobronchial Stenosis

Bo-Guen Kim et al. J Korean Med Sci. .

Abstract

Background: After relieving stenosis with an airway silicone stent in post-tuberculosis bronchial stenosis (PTTS), stent removal is attempted if it is determined that airway patency can be maintained even after stent removal. However, the factors affecting airway stent removal are not well known. We investigate the factors that enable the successful removal of airway silicone stents in patients with PTTS.

Methods: We retrospectively analyzed PTTS patients who underwent bronchoscopic intervention from January 2004 to December 2019. Successful stent removal is defined as airway patency maintained when the stent is removed, so that reinsertion of the stent is not required. A multivariate logistic regression analysis was used to identify independent factors associated with successful stent removal at the first attempt.

Results: Total 344 patients were analyzed. Patients were followed up for a median of 47.9 (26.9-85.2) months after airway stent insertion. Approximately 69% of PTTS patients finally maintained airway patency after the stent was removed. Factors related to successful stent removal at the first attempt were older age and male sex. Absence of parenchymal calcification, segmental consolidation & bronchiolitis, and no trachea involved lesion were relevant to the successful stent removal. Stent dwelling for 12-24 months was associated with successful stent removal compared to a duration of less than 12 months.

Conclusion: For patients whose airway patency is determined to be maintained even without a stent, it is necessary to attempt stent removal in consideration of factors related to successful stent removal.

Keywords: Airway Silicone Stent; Bronchoscopic Intervention; Post-Tuberculosis Tracheobronchial Stenosis.

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Conflict of interest statement

The authors have no potential conflicts of interest to disclose.

Figures

Fig. 1
Fig. 1. Flowchart of the study population.
PTTS = post-tuberculosis tracheobronchial stenosis. aOf the 458 patients, 319 patients had stents placed in the first procedure, and 62 patients did not have stents placed in the first procedure but needed stents in subsequent procedures. Of these 381 patients, 37 patients were excluded from insufficient follow-up period after stenting, resulting in 344 patients.
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