A catheter for the delivery of a therapeutic fluid to a patient's cavity is provided. The catheter includes an inflow lumen for delivering fluid to the patient's cavity； an outflow lumen for recovering fluid from the patient's cavity； an electrode located, in use, in the patient's cavity； and structure for supplying power to the electrode. Also provided is a system for the delivery of a therapeutic fluid to a patient's cavity, including the catheter, and a method for delivering a therapeutic fluid into a patient's cavity, including the step of using the catheter.
