Tissue localizing and separating assembly

A method for docking a tissue separator assembly to a tissue localization assembly comprising:

• providing a tissue separator assembly comprising an elongate tubular member and a tissue separator device, wherein the elongate tubular member comprises a proximal end, a distal end, and a lumen therebetween, and the tissue separator device is located near the distal end of the elongate tubular member;
• directing a tissue localization assembly along a tissue track to a position at a target site, the tissue localization assembly comprising an elongate member and a localization device, wherein the elongate member has a proximal end and a distal end, and wherein the localization device is located at the distal end of the elongate member;
• changing the localization device from a first, radially-contracted state to a second, radially-expanded state;
• joining a distal end of an elongate coupler to the proximal end of the elongate member of the tissue localization assembly, the elongate coupler passing through the lumen of the elongate tubular member of the tissue separator assembly;
• and
• moving the joined proximal and distal ends into the lumen of the elongate tubular member of the tissue separator assembly, thereby docking the tissue localization assembly and the tissue separator assembly.