A needle biopsy system device, comprising:
- a housing;
- a needle set mounted to the housing, the needle set comprising
- a needle defining a proximal end, a distal end and a tissue receiving opening, the needle movable between a retracted position and an extended position, and
- a cutting element defining a proximal end, a distal end and a cutting edge formed on the distal end, the cutting element moveable relative to the housing between a retracted position and an extended position, wherein the cutting element is configured to sever tissue projecting into the tissue-receiving opening when the cutting element is moved from the cutting element's retracted position to the cutting element's extended position;
- an actuator assembly at least partially disposed in the housing, the actuator assembly comprising
- a first magnetic member fixed with respect to the housing,
- a second magnetic member movable with respect to the housing, wherein the second magnetic member is magnetically attracted toward the first magnetic member, and wherein the second magnetic member is configured to move under the force of the magnetic attraction in a distal direction relative to the housing from a first position to a second position, and
- a third magnetic member movable with respect to the housing wherein the third magnetic member is magnetically repelled away from the first magnetic member, and wherein the third magnetic member is configured to move under the force of the magnetic repulsion in the distal direction relative to the housing from a first position to a second position;
- and
- first and second actuator members operatively connected to the second and third magnetic members, respectively,
- wherein the second magnetic member is coupled to the needle such that movement of the second magnetic member from the second magnetic member's first position to the second magnetic member's second position moves the coupled needle from the needle's retracted position to the needle's extended position,
- wherein the third magnetic member is coupled to the cutting element such that movement of the third magnetic member from the third magnetic member's first position to the third magnetic member's second position moves the coupled cutting element from cutting element's retracted position to cutting element's extended position, and
- wherein the first and second actuator members are independently movable in a proximal direction relative to the housing to move the second and third magnetic members to their respective first positions.