Balloon actuated apparatus having multiple embolic filters, and method of use
US6746469B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 30, 2001 |
| Grant date | Jun 8, 2004 |
| Priority date | — |
| Expiry date | Aug 1, 2022 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2230/0067
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An apparatus having multiple filters for capturing embolic material released from a lesion in an occluded body vessel being treated with an interventional procedure. The filters are placed downstream from the lesion, and the porosity of the filters decreases for each succeeding filter downstream from the lesion. Before encountering the filters, the embolic material passes a unidirectional barrier acting as a one-way valve to prevent backflow. The unidirectional barrier and filters are positioned along a plurality of arms. The arms may be fabricated from a memory metal, and the memory position of the plurality of arms is a collapsed position surrounding a common longitudinal axis. The apparatus includes an expansion member, such as a balloon, which inflates to move the plurality of arms radially outward to deploy the filters. Embolic material passes through the unidirectional barrier and is trapped between the layers of filters. When the balloon is deflated, the plurality of arms return to the memory position, collapse the unidirectional barrier and the filters, and embolic material remains trapped between the layers of filters.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.