An ablation device and/or method of ablation may include placing one or more ablation electrodes in contact with a target tissue in a lumen. An electrical insulator may be positioned between the electrode and a lumen fluid and an electrical signal (for example a radio frequency signal) may be conveyed between the electrodes to heat and/or ablate the target tissue. Ablation may be bipolar and/or an in lumen dispersive electrode may be supplied for unipolar ablation. Ablation progress may be sensed and ablation may be adjusted to produce a desired level and/or geometry and/or distribution of ablation.一種剝離裝置及/或剝離方法，可包括置放一或多個剝離電極，以接觸內腔之目標組織。該電極與內腔流體之間定位有電性絕緣體，且於電極之間傳遞電子訊號(例如，射頻信號)，以加熱及/或剝離該目標組織。剝離可為雙極，及/或內腔分散電極可用於單極剝離。可感測剝離進程及可調整剝離，以產生所希望之剝離程度及/或幾何形狀。
