Blood clot filter

Details Blood clot filter Blood clot filter

1981-10-22

1984-01-17

Truluck, Dalton L.

Surgery

Truss

Perineal

128303R, 128325, 128345, A61M 2900, A61B 1900

Patent

active

044259085

ABSTRACT:
A blood clot filter is inwardly radially collapsible into a collapsed configuration for insertion into a vein, and upon insertion automatically radially expands into a predetermined functional form which is in contact with the inner wall of the vein. In the expanded configuration, the filter comprises a plurality of wires in the form of overlapping loops, with portions of the loops contacting the inner wall of the vein, providing a filter basket at the leading end of the filter; at the trailing end the wires have circumferentially spaced leg portions whose free ends contact the inner wall of the vein. The filter wires are composed of a material having a first, relatively pliable low-temperature condition and a second, relatively rigid high-temperature condition. A guide wire feeder device introduces the filter in its collapsed configuration into the blood vessel of a patient through a standard angiographic catheter. Upon emerging from the catheter, the filter responds to the ambient temperature and assumes its functional form.

REFERENCES:
patent: 3137298 (1964-06-01), Glassman
patent: 3334629 (1967-08-01), Cohn
patent: 3540431 (1970-11-01), Mobin-Uddin
patent: 3868956 (1975-03-01), Alfidi et al.
patent: 3952747 (1976-04-01), Kimmell
patent: 4274408 (1981-06-01), Nimrod

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