Per Elgaard,Allan Torp,Raimo Urban Jensen,Rune Tore Paamand
申请号：
GB201505284
公开号：
GB2536714A
申请日:
2015.03.27
申请国别(地区):
GB
年份:
2016
代理人:
摘要：
An RF ablation system 10 includes a catheter 12 having a first retractable electrode 18 within its lumen and a second indifferent return electrode 20 disposed around the catheter 12 and spaced from the first electrode 18 by an insulating spacer which may be a part 36 of the catheter 12 or a sleeve 42 on the first electrode 18. The second electrode 20 has a surface area at least twice that of the first electrode 18 in order to act as a dispersive electrode, so that negligible heat is generated at the second electrode 20 and therefore no blood clotting or other ablation material is formed over the catheter 12. The first retractable electrode 18 is able to slide in and out of the catheter 12 in order to vary the exposed length of the first electrode 18 and as a result to alter the energy density at the first electrode 18 in order to exhibit different heating effects.
