The Safety of Pulsed Electric Field Ablation Before Standard of Care Treatment for Patients With Metastatic Cancer

To evaluate the safety of Aliya pulsed electric field (PEF) ablation in lung lesions at the time of biopsy before first-line standard of care (SOC) therapy in patients with metastatic cancer.

Eligible patients requiring diagnostic biopsy for suspected metastatic lung lesions were enrolled. Treatment-naive lesions ≤5 cm were PEF ablated bronchoscopically or percutaneously. Procedure and/or device-related adverse events (AE) or serious adverse events (SAEs) and their effects on subsequent therapy were assessed from PEF ablation through 30 days.

Forty-four lesions from 30 enrolled patients were ablated using PEF with 3-dimensional image guidance immediately following diagnostic biopsy under general anesthesia. Ninety percent (27/30) were ablated bronchoscopically with robotic navigation. One to 3 lesions (range: 0.4 to 2.4 cm longest diameter) were ablated per patient, including 17 within 1 cm of the pleura or a fissure. One procedure-related SAE (pneumothorax) occurred at the time of percutaneous biopsy and PEF ablation and resolved without sequelae. No AE impacted planned therapy initiation. Limited changes to the lung parenchyma in and around the PEF ablation zone were observed on CT scans 30 days post-PEF ablation.

This study demonstrates PEF ablation of lung lesions at the time of diagnostic biopsy is safe. One PEF-related SAE occurred within 30 days of PEF and resolved without sequelae. Ablation adjacent to sensitive structures was feasible, safe, and without impact on subsequent therapy.