Patent ID: 8886292
Filing Date: 2014-11-11
Classification: A61B

Abstract:
1. An apparatus for percutaneously implanting a localization wire within a tissue mass, comprising: a handle; a cannula mounted to the handle, the cannula defining a lumen and having a distal end forming an insertion tip, the cannula being movable relative to the handle between an insertion position and a retracted position; a localization wire positioned to extend from the handle and into the lumen of the cannula, the localization wire having a distal end that is positioned near the insertion tip and contained within the lumen when the cannula is in the insertion position, wherein the localization wire comprises at least one anchor adapted to hold the localization wire in the tissue mass, the cannula and the localization wire being configured such that each of the at least one anchor remains completely contained in the cannula when the cannula is in the insertion position prior to the cannula being moved to the retracted position; an actuator coupled to the cannula and configured to operate between a charged condition and a discharged condition to retract the cannula toward the retracted position to expose the distal end of the localization wire to the tissue mass and expose each of the at least one anchor to the tissue mass, without inducing movement of the localization wire, and with the cannula being removable from the localization wire in its entirety; and a collar mounted to the cannula, and wherein: the actuator includes a spring; and the handle defines a hollow interior and an end, with the cannula being slidably mounted to the end, and wherein the spring is located within the hollow interior and extends between the end and the collar, the spring being in a compressed state when the actuator is in the charged condition, wherein the collar forms a key and the apparatus further comprises a keyway shaped to receive the key, and wherein the key is unaligned from the keyway when the actuator is in the charged condition and is aligned with the keyway when the actuator is in the discharged condition.