Embolus trap
First Claim
1. An embolus trap for positioning in spaced relation in a fluid passageway in the human body comprising a tubular central column and one or more axially spaced tiers of radially outwardly urged elongated loops of filaments spaced around the column inclined thereto and attached thereto at one end, the other ends of at least some of the filaments terminating in at least one hook backed by a circumferential offset limiting the penetration of the hook into the wall of the fluid passage.
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Accused Products
Abstract
The device comprises a plurality of elongated filamentary loops extending outwardly from a central column in one or more tiers, the filaments having hooks backed by offset barriers at their free ends. The column is preferably hollow. The device is inserted into a passageway such as a vein with the loops held back toward the column and biased to open when released, and hook into the vein wall to form a network or web to engage and hold blood clots in the vein. The device anchors itself in place without injury to the wall of the passageway. It is self-centering and self-cleaning. Preferably the device is inserted over a wire guide threaded through the column and introduced into the vein through a hollow needle puncture.
867 Citations
14 Claims
- 1. An embolus trap for positioning in spaced relation in a fluid passageway in the human body comprising a tubular central column and one or more axially spaced tiers of radially outwardly urged elongated loops of filaments spaced around the column inclined thereto and attached thereto at one end, the other ends of at least some of the filaments terminating in at least one hook backed by a circumferential offset limiting the penetration of the hook into the wall of the fluid passage.
Specification