Anti-embolic filter

Details Anti-embolic filter Anti-embolic filter

1988-12-27

1990-09-18

Pellegrino, Stephen C.

Surgery

Instruments

Internal pressure applicator

128899, 604104, A61M 2900

Patent

active

049575015

ABSTRACT:
The filter is particularly for implantation in the interior vena cava by sliding through a small sized catheter of type 7F, so as to arrest the migration of all thrombi of dangerous size. The filter comprises a flexible wire having been subjected to a primitive predeformation into first and second substantially flat superposed loops. The loops are substantially symmetrical respectively with regard to two axes which are substantially orthogonal and convergent at a center of the filter. These loops can be elliptic and inscribed in a square, thus providing four contact points with the venous wall, which are in two-to-two symmetry with regard to the center on the longitudinal axis of the vein, which gives the filter high stability in the vein.

REFERENCES:
patent: 3540431 (1970-11-01), Mobin-Uddin
patent: 3952747 (1976-04-01), Kimmell, Jr.
patent: 4425908 (1984-01-01), Simon
patent: 4494531 (1985-01-01), Gianturco
patent: 4619246 (1986-10-01), Molgaard-Nielsen et al.
patent: 4643184 (1987-02-01), Mobin-Uddin
patent: 4688553 (1987-08-01), Metals
patent: 4727873 (1988-03-01), Mobin-Uddin
patent: 4832055 (1989-05-01), Palestrant
"New Percutaneous Caval Filter Device for Pulmonary Thromboembolism", by J. Driller et al Medical and Biological Engineering, Nov., 1976, pp. 629-635.

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