Embolic filters having multiple layers and controlled pore size
US7220271B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 30, 2003 |
| Grant date | May 22, 2007 |
| Priority date | — |
| Expiry date | Nov 26, 2024 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD10B2509/06
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The invention provides a device for filtering emboli from blood flowing through a lumen defined by the walls of a vessel in a patient's body comprising a filter element. The filter element is expandable from a collapsed configuration when the filter element is restrained to an expanded configuration when the filter element is unrestrained. When the filter element is in the expanded configuration, the average pore size is from 30 to 300 microns and the standard deviation of the pore size is less than 20 percent of the average pore size. The filter element has two or more filtering layers, each filtering layer having pores, each filtering layer being adjacent to at least one other filtering layer, and at least one of the filtering layers being made of a self-expanding material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.