Vena cava filter
US5836969A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 28, 1997 |
| Grant date | Nov 17, 1998 |
| Priority date | — |
| Expiry date | Jul 28, 2017 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2230/008
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A vascular filter comprises an emboli-capturing portion having a set of helical filter-wires joined at a central region and extending in a given direction along the blood vessel in a diverging relationship to the axis of the filter, the wires terminating in free ends constructed to engage the walls of said vessel. A major mid-portion of the length of the free ended wires are of generally helical form, cooperatively related to form an effective emboli capturing array. Anchoring is accomplished by a separate assembly formed of struts and anchoring devices. A parallelogram supporting strut assembly and other means for providing linear engagement with the wall of the vena cava are shown. The parallelogram structure is shown to have filter capability by itself as well.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.