Breast biopsy system and method
First Claim
1. A biopsy instrument 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; and
a proximal tissue cutting, element 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 being movable 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.
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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
33 Claims
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1. A biopsy instrument 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; and
a proximal tissue cutting, element 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 being movable 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method for isolating a tissue specimen in a patient'"'"'s body, comprising:
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a) inserting into the patient'"'"'s body a biopsy instrument 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; and
a proximal tissue cutting element disposed on the elongated 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 being movable 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;
b) advancing the biopsy instrument in the patient'"'"'s body until the distal end is disposed in a tissue region from which the tissue specimen is to be isolated;
c) energizing the proximal tissue cutting element with RF energy and radially extending said proximal tissue cutting element so that an arcuate portion thereof is radially outwardly spaced from the longitudinal axis of said shaft; and
d) rotating said proximal tissue cutting element about the longitudinal axis to cut said tissue and create a peripheral boundary about said tissue specimen, to isolate the tissue specimen from surrounding tissue in the tissue region. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23)
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24. A biopsy instrument 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; and
an electrosurgical proximal tissue cutting element 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 being movable 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. - View Dependent Claims (25, 26)
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27. A method for isolating a tissue specimen in a patient'"'"'s body, comprising:
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a) inserting into the patient'"'"'s body a biopsy instrument for isolating body tissue, comprising;
an elongate shaft having a longitudinal axis and a distal end;
a distal tissue cutting element having a curvilinear cutting surface disposed on the distal end of the shaft; and
an electrosurgical proximal tissue cutting element 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, and being movable in said radially extended position to isolate a desired tissue specimen from surrounding tissue by defining a peripheral margin about said tissue specimen;
b) advancing the biopsy instrument in the patient'"'"'s body until the distal end is disposed in a tissue region from which the tissue specimen is to be isolated;
c) energizing the proximal tissue cutting element with RF energy and radially extending said proximal tissue cutting element so that an arcuate portion thereof is radially outwardly spaced from the longitudinal axis of said shaft; and
d) rotating said proximal tissue cutting element about the longitudinal axis to cut said tissue and create a peripheral boundary about said tissue specimen, to isolate the tissue specimen from surrounding tissue in the tissue region. - View Dependent Claims (28, 29, 30, 31, 32, 33)
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Specification