TARGET TISSUE LOCALIZATION ASSEMBLY AND METHOD

摘要

A target tissue localization assembly (10) includes a radially expandable tissue anchor (18) connected to the distal ends (20, 22) of an anchor assembly (12) and an elongated anchor actuator element (16). A lock (30), engageable between the actuator element (16) and the placement element (14), may be used to prevent collapse of the anchor (12) from its radially expanded state. A sheath (26) may be slidably mounted over the anchor assembly (12). The sheath (26) and the anchor assembly may be configured to permit the sheath (26) to move in a proximal direction, relative to the anchor assembly (12), past a chosen location while preventing the sheath (26) from moving past the chosen location in a distal direction.