Plasma control

Abstract

Systems and methods for controlling plasma dosage; particularly, in some embodiments, using small diameter intrabody plasma delivery probes. Control of administration of a selected dosage of plasma to be applied to tissue may include selection of a pattern of motion of the probe as it moves to deliver plasma: not only to where, but also for how long the probe remains and/or at what speed the probe moves. In some embodiments, feedback from measurements is used to help ensure the targeted dosage of plasma is delivered; for example measurements of power which generates plasma, and/or spectral characteristics of generated plasma. In some embodiments, a joint relationship between probe position and plasma generation exists, such that maximum power is obtained at a certain distance from the target which allows the plasma plume to fully develop, rate of plasma delivery, accordingly, may itself be adjusted by motions of the plasma delivering probe.