To assess the efficacy of the gelatin torpedoes embolization technique after lung neoplastic lesions PRFA (percutaneous radiofrequency ablation) to reduce chest tube placement rate and hospital length of stay, and the safety of this embolization technique.

A total of 114 PRFA of lung neoplastic lesions performed in two centers between January 2017 and December 2022 were retrospectively reviewed. Two groups were compared, with 42 PRFA with gelatin torpedoes embolization technique (gelatin group) and 72 procedures without (control group). Procedures were performed by one of seven interventional radiologists using LeVeen CoAccess™ probe. Multivariate analyses were performed to identify risk factors for chest tube placement and hospital length of stay.

There was a significantly lower chest tube placement rate in gelatin group compared to the control group (3 [7.1%] vs. 27 [37.5%], p < 0,001). Multivariate analysis showed a significant association between chest tube placement and gelatin torpedoes embolization technique (OR: 0.09; 95% CI: 0.02–0.32; p = 0.0006). No significant difference was found in hospital length of stay between the two groups. Multivariate analysis did not show a significant relationship between hospital length of stay and gelatin torpedoes embolization technique. No embolic complication occurred in gelatin group.

Gelatin torpedoes embolization technique after PRFA of lung neoplastic lesions resulted in significantly reduced chest tube placement rate in our patient population. No significant reduction in hospital length of stay was observed. No major complication occurred in gelatin group.