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Publication Number
US-8540645-B2
Publication Date
2013-09-24
Expiration Date
Abstract
A needle biopsy device is disclosed. The biopsy device includes a housing, a needle set and an actuator assembly. The needle set includes a needle having a tissue receiving opening and a cutting element adapted to pass over or through the tissue receiving opening to sever tissue extending therein. The actuator assembly includes a first magnetic member fixed in a stationary position in the housing and a second magnetic member arranged in the housing so that the second magnetic member is either magnetically attracted toward or repelled from the first magnetic member. The second member is coupled to a respective one of the needle and cutting member so that movement of the second magnetic member effectuates movement of one of the needle and cutting element.
Core Innovation
The invention is a biopsy device having a housing, a needle set mounted to the housing, and a needle movable relative to the housing. The needle defines a proximal end, a distal end, and a tissue-receiving opening, and the needle set includes a cutting element that defines a proximal end, an open distal end, and a cutting edge at the open distal end, where the cutting element is moveable relative to the housing and is configured to sever tissue projecting into the tissue-receiving opening.
An actuator assembly at least partially disposed in the housing moves the needle and the cutting element between retracted positions and extended positions. The actuator assembly comprises a first magnetic member fixed with respect to the housing, a second magnetic member movable with respect to the housing, and a third magnetic member movable with respect to the housing. The second magnetic member is coupled to a first one of the needle and cutting element and is magnetically attracted to the first magnetic member, while the third magnetic member is coupled to a second one of the needle and cutting element and is repelled from the first magnetic member.
In the described needle biopsy system device, the second magnetic member is coupled to the needle such that movement of the second magnetic member moves the coupled needle from a retracted position to an extended position, and the third magnetic member is coupled to the cutting element such that movement moves the cutting element from a retracted position to an extended position. 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 respective first positions, and the document further describes separately actuatable control via manually engageable members and/or firing members.
Claims Coverage
The document includes two independent claims that share a common inventive concept: a biopsy device with a movable needle and a movable cutting element severing tissue projecting into a tissue-receiving opening, actuated by magnetic attraction and magnetic repulsion using a first fixed magnetic member and separate movable second and third magnetic members. The independent claims further distinguish how the needle and cutting element are independently coupled and extended, including independently movable actuator members in the system device claim.
Magnetically actuated movable needle and cutting element
A biopsy device with a housing, a needle defining proximal and distal ends and a tissue-receiving opening, the needle movable relative to the housing, and a cutting element defining a proximal end, an open distal end, and a cutting edge, the cutting element moveable relative to the housing and configured to sever tissue projecting into the tissue-receiving opening; an actuator assembly comprising a first magnetic member fixed with respect to the housing, and second and third magnetic members movable with respect to the housing, where the second magnetic member is coupled to a first one of the needle and cutting element and is magnetically attracted to the first magnetic member, and where the third magnetic member is coupled to a second one of the needle and cutting element and is repelled from the first magnetic member.
Independently movable magnetic actuation for needle biopsy system
A needle biopsy system device with a housing, a needle set mounted to the housing including a needle movable between a retracted position and an extended position and a cutting element moveable between a retracted position and an extended position, wherein the cutting element is configured to sever tissue projecting into the tissue-receiving opening when moved to the extended position; an actuator assembly comprising a first magnetic member fixed with respect to the housing, a second magnetic member movable with respect to the housing magnetically attracted toward the first magnetic member, and a third magnetic member movable with respect to the housing magnetically repelled away from the first magnetic member; first and second actuator members operatively connected to the second and third magnetic members, respectively, where movement of the second magnetic member moves the coupled needle from the retracted position to the extended position, and movement of the third magnetic member moves the coupled cutting element from the retracted position to the extended position, and where 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.
Across the independent claims, the key coverage is a biopsy device/system in which a movable needle and a movable cutting element are independently driven between retracted and extended positions using a magnetic actuator assembly with a first fixed magnetic member and separate second and third movable magnetic members that respectively operate by magnetic attraction and magnetic repulsion, with independent actuator member motion in the system device claim.
Stated Advantages
Not explicitly described in patent.
Documented Applications
Not explicitly described in patent.
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