Systems and methods are described for treating tissue with thermal energy while minimizing the amount of thermal energy to which adjacent tissue is exposed. A surgical instrument for delivering thermal energy to a section of tissue during percutaneous surgery, includes: an elongated shaft having a proximal...http://www.google.com.au/patents/US6350262?utm_source=gb-gplus-sharePatent US6350262 - Method and apparatus for applying thermal energy to tissue asymetrically
