Therectomy device having a light weight drive shaft and an imaging device
First Claim
1. An atherectomy device, comprising:
- a catheter including an expandable stent at the distal end of the catheter; and
a drive shaft having an ablation burr at its distal end, the drive shaft being routed within the catheter and rotatably secured to one side of the expandable stent such that the expandable stent forces the ablation burr against a vessel wall whereby rotation of the stent in the vessel causes the ablation burr to create a lumen in the vessel having a diameter that is larger than a diameter of the burr.
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Accused Products
Abstract
An atherectomy device having the ability to create variably sized lumens in a vessel. An ablation burr rotated by a drive shaft is routed through a control shaft having a bend in its distal end. The control shaft is in turn routed through a surrounding guide catheter. By extending or retracting the bend of the control shaft into the distal end of the guide catheter, the lateral displacement of the ablation burr is varied. A lumen in a vessel is created by rotating the control shaft within the surrounding guide catheter. In addition, the atherectomy device may include an integrated imaging sensor contained within a separate lumen of the catheter surrounding the drive shaft. The imaging sensor provides images of the interior of the vessel wall to determine if an occlusion has been removed by operation of the ablation burr. The catheter may include a self-expanding stent at its distal end to force the ablation burr against a vessel wall in order to create various sized lumens in a patient'"'"'s vasculature. Finally, the drive shaft that rotates the ablation burr is made of a lightweight polymeric material such as a liquid crystal polymer having fibers that are braided to provide desired torque and flexibility characteristics of the drive shaft.
307 Citations
6 Claims
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1. An atherectomy device, comprising:
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a catheter including an expandable stent at the distal end of the catheter; and
a drive shaft having an ablation burr at its distal end, the drive shaft being routed within the catheter and rotatably secured to one side of the expandable stent such that the expandable stent forces the ablation burr against a vessel wall whereby rotation of the stent in the vessel causes the ablation burr to create a lumen in the vessel having a diameter that is larger than a diameter of the burr. - View Dependent Claims (2, 3, 4, 5, 6)
5.The atherectomy device of claim 1, wherein the drive shaft is made of braided or wound fibers of a liquid crystal polymer material. -
5. The atherectomy device of claim 1, wherein the drive shaft h as a proximal end and a distal end, the distal end of the drive shaft being coated with an elastomer.
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6. The atherectomy device of claim 1, wherein the drive shaft comprises:
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a proximal portion;
a distal portion covered by an elastomer;
a anda coupler that joins the distal portion to the proximal portion.
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Specification
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- Resources
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Current AssigneeBoston Scientific Scimed (Boston Scientific Corporation)
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Original AssigneeScimed Life Systems Incorporated (Boston Scientific Corporation)
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InventorsPlaia, Mark, Barry, Robert L., Lafontaine, Daniel M.
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Primary Examiner(s)Isabella, David J.
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Assistant Examiner(s)Chattopadhyay, Urmi
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Application NumberUS09/639,873Time in Patent Office860 DaysField of Search623/1.11, 606/99, 606/108, 606/159, 606/167, 606/170, 606/171, 606/194, 606/15, 606/37, 606/39, 606/45, 606/46, 604/27, 604/28, 604/36, 604/507, 604/508, 604/510, 604/93.01, 604/95.01, 604/164.13, 604/264US Class Current606/159CPC Class CodesA61B 17/221 Gripping devices in the for...A61B 17/320725 with radially expandable cu...A61B 17/320758 with a rotating cutting ins...A61B 2017/320004 abrasiveA61B 2017/320733 with a flexible cutting or ...A61B 2090/378 using ultrasoundA61B 90/37 Surgical systems with image...
