Devices for percutaneous remote endarterectomy
First Claim
1. A device for percutaneously exposing an outer layer of a body lumen or body cavity of a patient which is covered by an inner layer of the body lumen or body cavity comprising:
- a catheter body having a proximal end, a distal end and a lumen therethrough; and
a dissection tool disposed near the distal end of the catheter body, the dissection tool comprising a radially expansive element circumferentially surrounding the catheter body and a cutting surface extending circumferentially about the radially expansive element, the cutting surface having a continuous cutting edge positioned radially outwardly from the radially expansive element by a preselected distance so that the cutting surface traverses the inner layer to the outer layer without penetrating the outer layer upon expansion of the element.
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Accused Products
Abstract
The present invention provides devices, systems, methods and kits for the percutaneous removal of unwanted tissue or obstructive matter from body cavities or lumens, particularly from the vasculature. Blood vessels, including the coronary, peripheral and neurovascular circulation, which are narrowed or blocked by atheromatous material or plaque are often treated with traditional endarterectomy procedures. The present invention allows the benefits of such a procedure with an intraluminal approach, particularly a percutaneous approach. Generally, the present invention provides a set of catheters or tools which are percutaneously introduceable to the site of the blockage or occlusion. The tools dissect or cut through the innermost tissue layer of the lumen to an underlying tissue layer. The innermost tissue layer is then stripped away from the underlying layer with the occlusive material thereattached. The detached tissue layer and occlusive material is then removed from the lumen; this may include additional cutting, maceration and removal through mechanical aspiration. In any case, the resulting lumen is free of obstruction.
273 Citations
40 Claims
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1. A device for percutaneously exposing an outer layer of a body lumen or body cavity of a patient which is covered by an inner layer of the body lumen or body cavity comprising:
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a catheter body having a proximal end, a distal end and a lumen therethrough; and a dissection tool disposed near the distal end of the catheter body, the dissection tool comprising a radially expansive element circumferentially surrounding the catheter body and a cutting surface extending circumferentially about the radially expansive element, the cutting surface having a continuous cutting edge positioned radially outwardly from the radially expansive element by a preselected distance so that the cutting surface traverses the inner layer to the outer layer without penetrating the outer layer upon expansion of the element. - View Dependent Claims (28, 29, 30, 31)
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- 2. A device as in claim l. wherein the body lumen comprises a blood vessel, the inner layer comprises an intimal layer, and the outer layer comprises an adventitial layer, and wherein the catheter body is sized to be positioned within the blood vessel and the cutting surface is positioned a distance radially outwardly from the radially expansive element so that the cutting surface traverses the intimal layer to the adventitial layer without penetrating the adventitial layer upon expansion of the element.
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32. A device for percutaneously exposing an outer layer of a body lumen or body cavity of a patient which is covered by an inner layer of the body lumen or body cavity comprising:
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a catheter body having a proximal end, a distal end, and a lumen therethrough; said catheter body further includes a radially expansive element circumferentially surrounding the catheter body; and a dissection means including a blade having a continuous cutting edge positioned radially outwardly from the radially expansive element for traversing the inner layer to the outer layer along a circumference of the body lumen or body cavity, without penetrating the outer layer to expose a portion of the outer layer, by expanding said blade. - View Dependent Claims (33, 34)
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35. A system for percutaneously treating a body lumen or body cavity of a patient comprising:
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a dissection catheter having a proximal end, a distal end, a catheter body, and a dissection means comprising a radially expansive element circumferentially surrounding the catheter body and a cutting surface extending circumferentially about the radially expansive element, the cutting surface having a continuous cutting edge positioned radially outwardly from the radially expansive element for dissecting an inner layer of the body lumen or body cavity to expose a portion of an outer layer of the body lumen or body cavity and a stripping catheter having a proximal end, a distal end, and a stripping means disposed near its distal end to advance along the exposed portion of the outer layer for delaminating the inner layer from the outer layer. - View Dependent Claims (36)
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37. A system for percutaneously treating an occlusion in a blood vessel of a patient comprising:
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a dissection catheter having a proximal end, a distal end, a catheter body, and a dissection tool comprising a radially expansive element circumferentially surrounding the catheter body and a cutting surface extending circumferentially about the radially expansive element, the cutting surface having a continuous cutting edge positioned radially outwardly from the radially expansive element adapted to expose a portion of an adventitial layer; and a stripping catheter having a proximal end, a distal end and a stripping tool disposed near the distal end adapted to contact the exposed portion of the adventitial layer and advance along the exposed portion to delaminate the intimal layer from the adventitial layer along a segment of the blood vessel. - View Dependent Claims (38, 39, 40)
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Specification