Application of Micro‑Tech stents in malignant carinal stenosis

Niu,Jin‑Mu; Zhang,Jie; Qiu,Xiao‑Jian; Wang,Juan; Pei,Ying‑Hua; Wang,Yu‑Ling; Wang,Ting

doi:10.3892/ol.2019.10051

Application of Micro‑Tech stents in malignant carinal stenosis

Authors:
- Jin‑Mu Niu
- Jie Zhang
- Xiao‑Jian Qiu
- Juan Wang
- Ying‑Hua Pei
- Yu‑Ling Wang
- Ting Wang
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Affiliations: Department of Respiration, Beijing Tian Tan Hospital, Capital Medical University, Dongcheng, Beijing 100050, P.R. China
Published online on: February 19, 2019 https://doi.org/10.3892/ol.2019.10051
Pages: 3990-3996

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Abstract

Malignant carinal stenosis is a disease process that is not always suitable for treatment with a Y‑shaped stent. When one of the main bronchi is completely obstructed and cannot be recanalized, or its distal lung tissue has lost function, inserting a Y‑shaped stent is infeasible. In this complex condition, a cone‑shaped stent is selected to maintain the patency of the trachea and the other main bronchus. The efficacy of the bare cone‑shaped Micro‑Tech stent to treat malignant carinal stenosis was evaluated in the current study. The medical records of 47 patients with malignant carinal stenosis who underwent Micro‑Tech stent placement between January 2004 and October 2017 in Beijing Tian Tan Hospital (Beijing, China) were analyzed retrospectively. A total of 47 bare Micro‑Tech stents (28 Y‑shaped and 19 cone‑shaped) were successfully inserted in the patients. Following stent placement, immediate satisfactory results were achieved in all patients, especially an improvement of dyspnea (100%), cough (81.1%) and stridor (100%). The Karnofsky scores were significantly increased (P<0.001), and the American Thoracic Society Dyspnea Index values were significantly decreased (P<0.001). Following a median of 88 days, initial bronchoscopic interventions were performed for tumor overgrowth (84.6%), stent fracture (7.7%) and granulation tissue (7.7%). Restenting was performed in two patients due to tumor progression (n=1) and stent fracture (n=1). Removal of a Y‑shaped stent was attempted in one patient, but failed, as the stent had become partly embedded in the airway mucosa. In conclusion, cone‑shaped Micro‑Tech stent placement maintained tracheal‑unilateral main bronchus patency and benefitted patients with malignant carinal stenosis in whom Y‑shaped stents were not suitable for insertion.

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