Needle assembly for use in ablation includes a needle having a conductive portion, and at least one conductive member at least partially extends through the bore of the needle. A portion of the at least one electrically conductive member is physically and electrically connected to the conductive portion of the needle. Ablation system and ablation methods may include such needle assembly. A method of forming a needle assembly for use in ablation includes the steps of at least one conductive member disposed within the needle, physically and electrically to the conductive portion of the needle the one conductive member and said at least I and a step of connecting to the.焼灼術で使用するための針アセンブリは、導電性部分を有する針と、該針の穴を通って少なくとも部分的に延在する少なくとも1つの導電性部材とを含む。少なくとも1つの導電性部材の一部分が、針の該導電性部分に物理的かつ電気的に接続されている。焼灼システムおよび焼灼の方法は、このような針アセンブリを含み得る。焼灼術で使用するための針アセンブリを形成する方法は、少なくとも1つの導電性部材を針内に配置する工程と、該少なくとも1つの導電性部材を該針の導電性部分に物理的かつ電気的に接続する工程とを含む。