A surgical tool for use as an ablation device in a surgical operation comprising: an ablation module output configured to ablate a volume of material at a surgical site to form an ablated volume； a control module arranged to receive information indicative of the position of the surgical site； and a fluid output adapted to deliver fluid to the surgical site during a surgical operation such that at least part of the ablated volume is filled with fluid and the fluid is in direct contact with at least part of the surgical site, wherein the control module is operable to control the flow rate of fluid delivered by the fluid output in response to the received information in order to control the position of the surgical site.
