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Flexible bronchoscopy-guided microwave ablation in peripheral porcine lung: a new minimally-invasive ablation.


ABSTRACT: Background:Transbronchial lung biopsy is an important approach to diagnose peripheral lung cancer, but bronchoscopy based treatment options are limited and poorly studied. A flexible bronchoscopy-guided water-cooled microwave ablation (MWA) catheter was developed to evaluate the feasibility and safety both in ex vivo and in vivo porcine models. Methods:Using direct penetration of the catheter through the surface of ex vivo porcine lung, ablations (n=9) were performed at 70, 80, 90 W for 10 minutes. Temperatures of the catheter and 10, 15, 20 mm away from the tip were measured. Under bronchoscopy conditions in porcine lung, ablations (n=18, 6 in ex vivo and 12 in vivo) were performed at 80 W for 5 minutes. Computed tomography (CT) was acquired perioperative, 24 hours, 2 weeks, and 4 weeks post ablation. Ablation zones were excised at 24 hours and 4 weeks respectively. Long-axis diameter (Dl) and short-axis diameter (Ds) were measured and tissues were sectioned for pathological examination. Results:In-ex vivo lung, the temperature at 20 mm removed was over 60 °C at 80 W for 288±26 seconds. The ablations under bronchoscopic conditions were successful in-ex vivo and in vivo lung. No complications occurred during the procedures. Coagulation necrosis was visible at 24 hours, and repaired fibrous tissue was seen at 4 weeks. Conclusions:The flexible bronchoscopy-guided water-cooled MWA is feasible and safe. This early animal data holds promise of MWA becoming a potential therapeutic tool for Peripheral Lung Cancers.

SUBMITTER: Yuan HB 

PROVIDER: S-EPMC6976383 | biostudies-literature | 2019 Dec

REPOSITORIES: biostudies-literature

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Flexible bronchoscopy-guided microwave ablation in peripheral porcine lung: a new minimally-invasive ablation.

Yuan Hai-Bin HB   Wang Xiang-Yu XY   Sun Jia-Yuan JY   Xie Fang-Fang FF   Zheng Xiao-Xuan XX   Tao Guang-Yu GY   Pan Lei L   Hogarth Douglas Kyle DK  

Translational lung cancer research 20191201 6


<h4>Background</h4>Transbronchial lung biopsy is an important approach to diagnose peripheral lung cancer, but bronchoscopy based treatment options are limited and poorly studied. A flexible bronchoscopy-guided water-cooled microwave ablation (MWA) catheter was developed to evaluate the feasibility and safety both in <i>ex vivo</i> and <i>in vivo</i> porcine models.<h4>Methods</h4>Using direct penetration of the catheter through the surface of <i>ex vivo</i> porcine lung, ablations (n=9) were pe  ...[more]

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