Removable embolus blood clot filter

Details Removable embolus blood clot filter Removable embolus blood clot filter

1998-09-25

1999-12-28

Buiz, Michael

Surgery

Instruments

Internal pressure applicator

606194, 606198, A61M 2900

Patent

active

060075589

ABSTRACT:
A blood clot filter which is collapsible toward a central longitudinal axis into a collapsed configuration for insertion into a blood vessel and which is radially expandable outwardly from the longitudinal axis to an expanded configuration for contact with the inner wall of the blood vessel at two longitudinal spaced locations. A first plurality of spaced, elongate arms, in the expanded configuration of the filter, curve outwardly away from the longitudinal axis toward the leading end of the filter to form a first filter basket and to center a hub at the trailing end of the filter within the vessel. A second plurality of spaced elongate legs angle outwardly away from the longitudinal axis toward the leading edge of the filter in the expanded configuration thereof to form a second filter basket opening toward the leading end. To prevent longitudinal movement of the filter, the ends of these legs include hooks, at least a portion of which is of a reduced cross sectional area relative to the cross sectional area of the adjacent leg to permit the hooks to bend and straighten in response to withdrawal force.

REFERENCES:
patent: 4425908 (1984-01-01), Simon
patent: 5108418 (1992-04-01), Lefebvre
patent: 5133733 (1992-07-01), Rasmussen et al.
patent: 5242462 (1993-09-01), El-Nounou et al.
patent: 5370657 (1994-12-01), Irie
patent: 5601595 (1997-02-01), Smith
patent: 5669933 (1997-09-01), Simon et al.
patent: 5776162 (1998-07-01), Kleshinski
patent: 5800457 (1998-09-01), Gelbfish
patent: 5836968 (1998-11-01), Simon et al.
Cook "Bird's Nest" Vena Cava Filter, Cook Incorporated, a Cook Group Company, Nov. 1982.
"Metals that Remember", James Hansen, Science 81, pp. 44-47.
"A Vena Cava Filter Using Thermal Shape Memory Alloy", Morris Simon et al., Radiology, vol. 125, No. 1, Oct. 1977, pp. 89-94.
"Transvenous Devices for the Management of Pulmonary Embolism", Morris Simon et al., CardioVascular and Interventional Radiology, 3:308-313, 1980, pp. 112-120.

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