Helical embolic protection device
First Claim
1. An embolic protection device for capturing emboli during treatment of a stenotic lesion in a body vessel, the device comprising:
- an elongated shaft having a proximal portion and a distal portion extending from the proximal portion; and
an expandable filter formed helically about the distal portion of the elongated shaft, the expandable filter formed integrally with the elongated shaft such that the elongated shaft and the expandable filter have a one-piece construction, the expandable filter being configured to helically close defining a collapsed state for delivery and retrieval of the device, the expandable filter being configured to helically open defining an expanded state for capturing emboli during treatment of the stenotic lesion in the body vessel, the expandable filter having a plurality of filter portions each helically and separately extending from the elongated shaft, the filter portions being directly adjacent to each other, each of the plurality of filter portions defining a proximally faced opening when the expandable filter is in the expanded state, the plurality of filter portions being of a one-piece construction with the elongated shaft and having filter holes formed therethrough, wherein each of the plurality of filter portions defines a conical shape and overlaps with an adjacent filter portion.
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Accused Products
Abstract
An embolic protection device for capturing emboli during treatment of a stenotic lesion in a body vessel is disclosed. The device comprises an elongated shaft having a proximal portion and a distal portion extending from the proximal portion. The device further comprises an expandable filter formed helically about the distal portion of the elongated shaft. The expandable filter is configured to helically close defining a collapsed state for delivery and retrievable of the device. The expandable filter is configured to helically open defining an expanded state for capturing emboli during treatment of the stenotic lesion in the body vessel. The expandable filter has at least one filter portion helically extending from the elongated shaft at a predetermined angle defining an opening when the filter is in the expanded state.
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Citations
21 Claims
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1. An embolic protection device for capturing emboli during treatment of a stenotic lesion in a body vessel, the device comprising:
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an elongated shaft having a proximal portion and a distal portion extending from the proximal portion; and an expandable filter formed helically about the distal portion of the elongated shaft, the expandable filter formed integrally with the elongated shaft such that the elongated shaft and the expandable filter have a one-piece construction, the expandable filter being configured to helically close defining a collapsed state for delivery and retrieval of the device, the expandable filter being configured to helically open defining an expanded state for capturing emboli during treatment of the stenotic lesion in the body vessel, the expandable filter having a plurality of filter portions each helically and separately extending from the elongated shaft, the filter portions being directly adjacent to each other, each of the plurality of filter portions defining a proximally faced opening when the expandable filter is in the expanded state, the plurality of filter portions being of a one-piece construction with the elongated shaft and having filter holes formed therethrough, wherein each of the plurality of filter portions defines a conical shape and overlaps with an adjacent filter portion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An embolic protection assembly for capturing emboli during treatment of a stenotic lesion in a body vessel, the assembly comprising
a balloon catheter having a tubular body portion and an expandable balloon attached to and in fluid communication with the tubular body portion for angioplasty at the stenotic lesion, the expandable balloon having distal and proximal portions; - and
an embolic protection device coaxially disposed within the balloon catheter during treatment of the stenotic lesion in the body vessel, the device comprising; an elongated shaft having a proximal portion and a distal portion extending from the proximal portion; and an expandable filter formed helically about the distal portion of the elongated shaft, the expandable filter formed integrally with the elongated shaft such that the elongated shaft and the expandable filter have a one-piece construction, the expandable filter being configured to helically close defining a collapsed state for delivery and retrieval of the device, the expandable filter being configured to helically open defining an expanded state for capturing emboli during treatment of the stenotic lesion in the body vessel, the expandable filter having a plurality of filter portions each helically and separately extending from the elongated shaft at a predetermined angle relative to the elongated shaft, the filter portions being directly adjacent to each other, each of the plurality of filter portions defining a proximally faced opening when the expandable filter is in the expanded state, each of the plurality of filter portions having filter holes formed therethrough, each of the plurality of filter portions having a proximal end and a distal end, wherein the proximal end defines the opening in the expanded state, the proximal end being an open end free from contact of any other structure, wherein each of the plurality of filter portions defines a conical shape and overlaps with an adjacent filter portion. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. A method for embolic protection during treatment of a stenotic lesion in a body vessel, the method comprising:
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percutaneously introducing a balloon catheter in the body vessel, the balloon catheter having a tubular body portion and an expandable balloon attached to and in fluid communication with the tubular body portion for angioplasty at the stenotic lesion; disposing an embolic protection device in a collapsed state coaxially within the balloon catheter, the device comprising; an elongated shaft having a proximal portion and a distal portion extending from the proximal portion; and an expandable filter formed helically about the distal portion of the elongated shaft, the expandable filter formed integrally with the elongated shaft such that the elongated shaft and the expandable filter have a one-piece construction, the expandable filter being configured to helically close defining the collapsed state for delivery and retrieval of the device, the expandable filter being configured to helically open defining an expanded state for capturing emboli during treatment of the stenotic lesion in the body vessel, the expandable filter having a plurality of filter portions each helically and separately extending from the elongated shaft at a predetermined angle relative to the elongated shaft, the filter portions being directly adjacent to each other, each of the plurality of filter portions defining a proximally faced opening when the expandable filter is in the expanded state, the plurality of filter portions being of a one-piece construction with the elongated shaft and having filter holes formed therethrough, wherein each of the plurality of filter portions defines a conical shape and overlaps with an adjacent filter portion; and deploying the device in the expanded state by turning the elongated shaft about a first direction relative to the elongated shaft downstream from the stenotic lesion to helically open the expandable filter and capture emboli during treatment of the stenotic lesion. - View Dependent Claims (20, 21)
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Specification