Systems and devices for treating lung tumors

Abstract

A system for treatment of a target region of lung tissue including: a flow regulator configured to be interposed between a conductive fluid source and a conductive fluid outlet at a distal region of a catheter positioned in the target region and the conductive fluid outlet is positionable at or in proximity of the target region of lung tissue, wherein the flow regulator being further configured to control a flow rate or a bolus quantity of the conductive fluid coming from the fluid source and delivered through the conductive fluid outlet to the target region; an ablation electrode mounted to the distal region of the catheter; a controller configured to control the flow regulator, and configured to control power delivered from an ablation energy source to the ablation electrode, wherein the controller is configured to: receive one or more of the values of the control parameter; control the delivery of power from the ablation energy source to the ablation electrode; while the power is delivered to the ablation electrode, maintain a temperature in the target region within a first temperature range by controlling the flow regulator to adjust the flow of the conductive fluid delivered to the conductive fluid outlet; determine an amount of the conductive fluid delivered to the conductive fluid output; in response to the amount of the conductive fluid reaching a threshold volume, ceasing the flow of the conductive fluid to the conductive fluid output; during the cessation of the flow of the conductive fluid to the conductive fluid output, maintain the temperature in the target region within a second temperature range by adjusting the power delivered to ablation electrode.