Breast biopsy system and methods
First Claim
1. A system for isolating body tissue, comprising:
- an elongate shaft having a longitudinal axis and a distal end;
an electrosurgical tissue cutting element having a curvilinear cutting surface secured to the distal end of the shaft;
a proximal tissue cutting element which is disposed on the elongate shaft proximal of the distal tissue cutting element which is radially extendable from a radially retracted position to a radially extended position, relative to the longitudinal axis, having an arcuate shape and which is rotatable independent of the tissue cutting element secured to the distal end in said radially extended position and arcuate shape to isolate a desired tissue specimen from surrounding tissue by defining a peripheral margin about said tissue specimen; and
a source of radiofrequency energy.
1 Assignment
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Accused Products
Abstract
An apparatus and method are provided for precisely isolating a target lesion in a patient'"'"'s body tissue, resulting in a high likelihood of“clean” margins about the lesion when it is removed for diagnosis and/or therapy. This approach advantageously will often result in the ability to both diagnose and treat a malignant lesion with only a single percutaneous procedure, with no follow-up percutaneous or surgical procedure required, while minimizing the risk of migration of possibly cancerous cells from the lesion to surrounding tissue or the bloodstream. In particular, the apparatus comprises a biopsy instrument having a distal end adapted for entry into the patient'"'"'s body, a longitudinal shaft, and a cutting element disposed along the shaft. The cutting element is actuatable between a radially retracted position and a radially extended position. Advantageously, the instrument is rotatable about its axis in the radially extended position to isolate a desired tissue specimen from surrounding tissue by defining a peripheral margin about the tissue specimen. Once the tissue specimen is isolated, it may be segmented by further manipulation of the cutting element, after which the tissue segments are preferably individually removed from the patient'"'"'s body through a cannula or the like. Alternatively, the specimen may be encapsulated and removed as an intact piece.
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Citations
26 Claims
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1. A system for isolating body tissue, comprising:
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an elongate shaft having a longitudinal axis and a distal end;
an electrosurgical tissue cutting element having a curvilinear cutting surface secured to the distal end of the shaft;
a proximal tissue cutting element which is disposed on the elongate shaft proximal of the distal tissue cutting element which is radially extendable from a radially retracted position to a radially extended position, relative to the longitudinal axis, having an arcuate shape and which is rotatable independent of the tissue cutting element secured to the distal end in said radially extended position and arcuate shape to isolate a desired tissue specimen from surrounding tissue by defining a peripheral margin about said tissue specimen; and
a source of radiofrequency energy. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A system for isolating body tissue, comprising:
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an elongate shaft having a longitudinal axis and a distal end;
a distal tissue cutting element having a linear cutting surface disposed on the distal end of the shaft;
an electrosurgical proximal tissue cutting element which is disposed on the elongate shaft proximal of the distal tissue cutting element, which is radially extendable from a radially retracted position to a radially extended position, relative to the longitudinal axis, having an arcuate shape and which is rotatable independent of the tissue cutting element secured to the distal end in said radially extended position and arcuate shape to isolate a desired tissue specimen from surrounding tissue by defining a peripheral margin about said tissue specimen; and
a source of radiofrequency energy. - View Dependent Claims (16, 17, 18)
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19. An instrument for encapsulating body tissue, comprising:
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an elongate shaft having a longitudinal axis and a distal end;
an electrosurgical tissue cutting element having a curvilinear cutting surface secured to the distal end of the shaft;
a proximal tissue cutting element which is disposed on the elongate shaft proximal of the distal tissue cutting element, which is radially extendable from a radially retracted position to a radially extended position, relative to the longitudinal axis, having an arcuate shape and which is rotatable independent of the tissue cutting element secured to the distal end in said radially extended position and arcuate shape to isolate a desired tissue specimen from surrounding tissue by defining a peripheral margin about said tissue specimen; and
at least one encapsulation element. - View Dependent Claims (20)
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21. An instrument for encapsulating body tissue, comprising:
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an elongate shaft having a longitudinal axis and a distal end;
a distal tissue cutting element having a linear cutting surface disposed on the distal end of the shaft;
an electrosurgical proximal tissue cutting element which is disposed on the elongate shaft proximal of the distal tissue cutting element, which is radially extendable from a radially retracted position to a radially extended position, relative to the longitudinal axis, having an arcuate shape and which is rotatable independent of the tissue cutting element secured to the distal end in said radially extended position and arcuate shape to isolate a desired tissue specimen from surrounding tissue by defining a peripheral margin about said tissue specimen; and
a plurality of encapsulation elements. - View Dependent Claims (22)
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23. A system for encapsulating body tissue, comprising:
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an elongate shaft having a longitudinal axis and a distal end;
an electrosurgical tissue cutting element having a curvilinear cutting surface secured to the distal end of the shaft;
a proximal tissue cutting element which is disposed on the elongate shaft proximal of the distal tissue cutting element, which is radially extendable from a radially retracted position to a radially extended position, relative to the longitudinal axis, having an arcuate shape and which is rotatable independent of the tissue cutting element secured to the distal end in said radially extended position and arcuate shape to isolate a desired tissue specimen from surrounding tissue by defining a peripheral margin about said tissue specimen;
at least one encapsulation element configured to extend about at least in part the isolated tissue specimen; and
a source of radiofrequency energy. - View Dependent Claims (24)
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25. A system for encapsulating body tissue, comprising:
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an elongate shaft having a longitudinal axis and a distal end;
a distal tissue cutting element having a linear cutting surface disposed on the distal end of the shaft;
an electrosurgical proximal tissue cutting element which is disposed on the elongate shaft proximal of the distal tissue cutting element, which is radially extendable from a radially retracted position to a radially extended position, relative to the longitudinal axis, having an arcuate shape and which is rotatable independent of the tissue cutting element secured to the distal end in said radially extended position and arcuate shape to isolate a desired tissue specimen from surrounding tissue by defining a peripheral margin about said tissue specimen;
at least one encapsulation configured to extend over at least a portion of the isolated tissue specimen; and
a source of radiofrequency energy. - View Dependent Claims (26)
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Specification