Vaso-occlusion coil and method

Details Vaso-occlusion coil and method Vaso-occlusion coil and method

1988-11-02

1991-02-19

Green, Randall L.

Surgery

Instruments

Internal pressure applicator

606198, 606200, 604104, 623 1, 623 11, A61B 1712, A61B 1700

Patent

active

049940694

ABSTRACT:
A flexible, preferably coiled wire for use in small-vessel vaso-occlusion. The wire has a stretched, linear condition in which it can be advanced through a catheter lumen to a selected vessel, and a relaxed, convoluted condition produced by a combination of a helical winding of the wire, and irregularities of the helical winding. When the wire is released from a catheter into a vessel, it assumes a randomly coiled, substantially space-filling mass which is lodged at the site of release. In a preferred embodiment, the helical winding in the wire's relaxed condition has about the same diameter as that of the vessel, and the wire, in its stretched condition, has a length of about 15-20 times the vessel diameter.

REFERENCES:
patent: 3334629 (1967-08-01), Cohn
patent: 3868956 (1975-03-01), Alfidi et al.
patent: 4494531 (1985-01-01), Gianturco
patent: 4655771 (1987-04-01), Wallsten
patent: 4865516 (1989-08-01), Hillsted

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