DEVICES AND METHODS FOR PERFORMING PROCEDURES ON A BREAST
First Claim
1. A device for cutting tissue having a bowed cutting element, comprising:
- a shaft having a central axis; and
a tissue cutting element coupled to the shaft, the tissue cutting element being movable from a collapsed position to an expanded position, the cutting element bowing outwardly when in the expanded position, the cutting element moving generally in a first plane when moving between the collapsed and expanded positions;
the shaft having a first thickness and a second thickness relative to the central axis of the shaft, the first and second thicknesses lying in a second plane which is generally parallel to the first plane, the second thickness being at least 1.25 times larger than the first thickness and the side of the shaft having the second thickness leading the cutting element during rotation.
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Accused Products
Abstract
A device for cutting tissue having a bowed cutting element may include a shaft having a central axis and a tissue cutting element coupled to the shaft. The tissue cutting element may be movable from a collapsed position to an expanded position and may bow outwardly when in the expanded position. The cutting element generally moves in a first plane when moving between the collapsed and expanded positions. The shaft may have a first thickness and a second thickness relative to the central axis of the shaft. The first and second thicknesses may lie in a second plane which is generally parallel to the first plane. The second thickness may be at least 1.25 times larger than the first thickness and the side of the shaft may have the second thickness leading the cutting element during rotation.
102 Citations
56 Claims
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1. A device for cutting tissue having a bowed cutting element, comprising:
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a shaft having a central axis; and
a tissue cutting element coupled to the shaft, the tissue cutting element being movable from a collapsed position to an expanded position, the cutting element bowing outwardly when in the expanded position, the cutting element moving generally in a first plane when moving between the collapsed and expanded positions;
the shaft having a first thickness and a second thickness relative to the central axis of the shaft, the first and second thicknesses lying in a second plane which is generally parallel to the first plane, the second thickness being at least 1.25 times larger than the first thickness and the side of the shaft having the second thickness leading the cutting element during rotation. - View Dependent Claims (2, 3)
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4. A device for cutting tissue using a bowed cutting element, comprising:
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a shaft; and
a tissue cutting element coupled to the shaft, the tissue cutting element being movable from a collapsed position to an expanded position, the cutting element bowing outwardly when in the expanded position, the tissue cutting element moving generally in a first plane when moving between the collapsed and expanded positions;
wherein the shaft is at least 1.25 times thicker on a leading side than on a trailing side, the thickness being measured along a second plane perpendicular to the first plane, the cutting device being rotated during cutting so that the leading side leads the cutting element. - View Dependent Claims (5, 6)
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7. A method of cutting tissue using a bowed cutting element, comprising the steps of:
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providing a tissue cutting device having a shaft and a tissue cutting element coupled to the shaft, the tissue cutting element being movable from a collapsed position to an expanded position, the cutting element bowing outwardly when in the expanded position, the tissue cutting element moving generally in a first plane when moving between the collapsed and expanded positions, wherein the shaft has a first and second thicknesses lying in a second plane which is generally parallel to the first plane, the second thickness being on a side of the shaft from which the tissue cutting element expands, the second thickness being at least 1.25 times larger than the first thickness;
introducing the tissue cutting device into tissue;
expanding the tissue cutting element toward the expanded position;
rotating the tissue cutting device so that the cutting element moves through the tissue to cut the tissue, the cutting device being rotated in a direction in which a side having the second thickness leads the cutting element during rotation;
moving the tissue cutting element back toward the collapsed position to cut a tissue volume free from the surrounding tissue. - View Dependent Claims (8, 9, 10)
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11. A method of cutting tissue using a bowed cutting element, comprising the steps of:
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providing a tissue cutting device having a shaft and a tissue cutting element coupled to the shaft, the tissue cutting element being movable from a collapsed position to an expanded position, the cutting element bowing outwardly when in the expanded position, the tissue cutting element moving generally in a first plane when moving between the collapsed and expanded positions, wherein the shaft is at least 1.25 times thicker on a first side defined in the direction in the cutting element expands than a second side opposite the first side;
introducing the tissue cutting device into tissue adjacent to a tissue volume to be removed;
expanding the tissue cutting element toward the expanded position;
rotating the shaft so that the cutting element moves through the tissue to cut around the tissue volume to be removed, the cutting device being rotated in a direction in which the first side of the shaft leads the cutting element during rotation; and
moving the tissue cutting element back toward the collapsed position to cut a tissue volume free from the surrounding tissue. - View Dependent Claims (12, 13)
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14. A method of cutting a tissue mass free from surrounding breast tissue, comprising the steps of:
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providing a tissue cutting device and a guide element, the tissue cutting device having a tissue cutting element movable from a collapsed position to an expanded position;
inserting the guide element into a breast;
advancing the tissue cutting device into the breast, the tissue cutting device being slidably coupled to the guide element so that the guide element guides advancement of the tissue cutting device into the breast; and
cutting breast tissue with the tissue cutting device, the cutting step being carried out with the guide element indicating a cutting parameter for the cutting device. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22)
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23. A method of removing breast tissue, comprising the steps of:
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providing a tissue cutting device and an insertion device having a sharp tip, the tissue cutting device having a cutting element which is movable from a collapsed position to an expanded position, the cutting element being bowed outward when in the expanded position;
inserting the insertion device into a breast with the sharp tip of the insertion device piercing the breast tissue during insertion;
coupling the tissue cutting device to the insertion device so that the tissue cutting device is slidably coupled to the insertion device;
advancing the insertion device into the breast tissue while being slidably coupled to the insertion device;
moving the tissue cutting element toward the expanded position after the withdrawing step;
rotating the tissue cutting device to cut around the tissue to be removed; and
removing the tissue which has been cut free from the surrounding tissue by the tissue cutting device. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31)
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32. A method of forming an RF-energized bowed cutting element, comprising the steps of:
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providing a tissue cutting device having a cutting element coupled to a shaft, the cutting element being movable from a collapsed position to an expanded position, the cutting element being in a substantially straight configuration when collapsed and bowing outwardly from the shaft when in the expanded position; and
marking a first location on the cutting element corresponding to a position on the cutting element where an apex occurs when the cutting element is bowed outwardly, the location being marked for visualization using ultrasound. - View Dependent Claims (33)
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34. A device for cutting tissue, comprising:
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a shaft;
a cutting element coupled to the shaft, the cutting element being movable from a substantially straight position to an expanded position, the cutting element having an apex corresponding to a maximum radial extension of the cutting element when in the expanded position;
a first ultrasound marker on the cutting element positioned on the cutting element at a position corresponding to the apex when in the collapsed position;
a second ultrasound marker which marks a proximal location of the cutting element, and a third ultrasound marker which marks a distal location on the cutting element. - View Dependent Claims (35, 36)
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37. A suction sleeve for a soft tissue interventional device that includes a shaft, the suction sleeve comprising a tapered portion defining a predetermined extent, the tapered portion defining a first external surface and a first internal surface, the first internal surface defining an internal axial lumen spanning the predetermined extent, the internal axial lumen being configured to receive the shaft, the first external surface defining a suction port and a plurality of openings that open to the internal axial lumen.
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38. A method for cutting a specimen of soft tissue, comprising the steps of:
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providing a device including a handle, a shaft coupled to the handle and defining a first end and a second end, a cutting element coupled to the second end of the shaft, and a suction sleeve disposed coaxially around the shaft between the first end of the shaft and the cutting element, the suction sleeve defining a suction port and a plurality of openings near the work element, the suction sleeve being configured to enable suction in through the plurality of openings and out through the suction port;
inserting the device in the soft tissue;
cutting the tissue specimen using the cutting element, and applying suction to the suction port during the cutting step.
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39. A method of excising breast tissue, comprising the steps of:
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providing a guide element and a cutting device, the cutting device having a deployable cutting element mounted on a shaft;
introducing the guide element into a patient'"'"'s breast;
advancing the cutting device into the patient'"'"'s breast, the cutting device being slidably coupled to the guide element so that the guide element guides the cutting device as the cutting device is advanced into the patient'"'"'s breast;
deploying a cutting element on the cutting device after the advancing step;
rotating the shaft so that the cutting element severs breast tissue; and
removing the breast tissue which has been severed by the cutting element. - View Dependent Claims (40, 41, 42, 43, 44, 45, 46)
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47. A system for removing breast tissue, comprising:
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a guide element; and
a cutting device, the cutting device having a deployable cutting element mounted on a shaft, the cutting device being configured to be slidably coupled to the guide element. - View Dependent Claims (48, 49, 50, 51)
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52. A method of cutting a piece of breast tissue, comprising the steps of:
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providing a tissue cutting device having shaft and a cutting element, the cutting element being movable from a collapsed position to an expanded position, the cutting element bowing outward when moving from the collapsed position to the expanded position;
introducing the tissue cutting device into a breast;
expanding the cutting element toward the expanded position;
rotating the shaft so that the cutting element cuts the breast tissue; and
partially collapsing the cutting element after the expanding and rotating steps so that a portion of the tissue remains trapped between the cutting element and the shaft. - View Dependent Claims (53, 54, 55, 56)
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Specification