Atherectomy medical device
First Claim
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1. An atherectomy device, comprising:
- an elongate shaft having a proximal end region, a distal end region and a lumen extending therein;
a cutter positioned adjacent the distal end region of the elongate shaft, wherein the cutter is radially expandable and includes an outermost radial extent, wherein the cutter includes a plurality of blade members, wherein each blade member is radially expandable independent of the remainder of blade members; and
a guide positioned adjacent the cutter, wherein the guide is radially expandable and includes an outermost radial extent, wherein the outermost radial extent of the cutter is offset a fixed radial distance from the outermost radial extent of the guide, wherein radial expansion of the cutter is directly proportional to radial expansion of the guide.
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Abstract
Medical devices and methods for using medical devices are disclosed. A rotational atherectomy device may include an elongate shaft having a proximal end region, a distal end region and a lumen extending therein. The medical device may also include a cutting member positioned adjacent the distal end region of the elongate shaft. The cutting member may be radially expandable. The medical device may also include a sizing member positioned adjacent the cutting member. The sizing member may be radially expandable, and the radial expansion of the cutting member may be limited by radial expansion of the sizing member.
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Citations
19 Claims
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1. An atherectomy device, comprising:
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an elongate shaft having a proximal end region, a distal end region and a lumen extending therein; a cutter positioned adjacent the distal end region of the elongate shaft, wherein the cutter is radially expandable and includes an outermost radial extent, wherein the cutter includes a plurality of blade members, wherein each blade member is radially expandable independent of the remainder of blade members; and a guide positioned adjacent the cutter, wherein the guide is radially expandable and includes an outermost radial extent, wherein the outermost radial extent of the cutter is offset a fixed radial distance from the outermost radial extent of the guide, wherein radial expansion of the cutter is directly proportional to radial expansion of the guide. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An atherectomy device, comprising:
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an elongate shaft having a proximal end region, a distal end region and a lumen extending therein; a cutter positioned adjacent the distal end region of the elongate shaft, wherein the cutter is radially expandable and has an outermost radial extent, wherein the cutter includes a plurality of blade members, wherein one or more of the blade members can flex independently of the remaining blade members; and a guide positioned adjacent the cutter, wherein the guide is radially expandable and has an outermost radial extent, and wherein the atherectomy device includes a fixed radial offset, wherein the fixed radial offset is defined as a fixed radial distance between the outermost radial extent of the cutter and the outermost radial extent of the guide, wherein radial expansion of the cutter is directly proportional to radial expansion of the guide. - View Dependent Claims (15, 16, 17, 18)
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19. An atherectomy device, comprising:
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an elongate shaft having a proximal end region, a distal end region and a lumen extending therein; a guide positioned adjacent the distal end region of the elongate shaft, wherein the guide is radially expandable; a cutter positioned adjacent the guide, wherein the cutter is radially expandable, and wherein radial expansion of the cutter is directly proportional to radial expansion of the guide; and one or more channels extending between the elongate shaft, the guide and the cutter.
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Specification