Collapsible filter basket
First Claim
1. A collapsible filter basket adapted to be introduced into a blood vessel of a patient, comprising a plurality of resilient wires interconnected at their respective ends, said basket in its expanded and relaxed state assuming the shape of an apertured, elongate solid of revolution with pointed ends and having a length as measured between the pointed ends at least equal to the maximum diameter thereof.
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Accused Products
Abstract
A plurality of resilient wires interconnected at their respective ends form a collapsible filter basket adapted to be introduced into a blood vessel of a patient. The basket in its expanded and relaxed state forms an apertured, elongate solid of revolution with pointed ends and has a base as measured between the pointed ends at least equal to the maximum diameter thereof. The design of the filter basket of the present invention facilitates insertion and adjustment of position or orientation once inserted and allows large masses of emboli to build up without seriously restricting the free area available for blood flow through the filter.
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Citations
48 Claims
- 1. A collapsible filter basket adapted to be introduced into a blood vessel of a patient, comprising a plurality of resilient wires interconnected at their respective ends, said basket in its expanded and relaxed state assuming the shape of an apertured, elongate solid of revolution with pointed ends and having a length as measured between the pointed ends at least equal to the maximum diameter thereof.
- 34. A collapsible filter basket adapted to be introduced into a blood vessel of a patient, comprising a plurality of resilient wires interconnected at their respective ends, said basket in its expanded and relaxed state assuming the shape of an apertured, elongate solid of revolution with pointed ends and with the resilient wires extending in the form of helices on the surface of the solid of revolution, said basket having a length as measured between the pointed ends at least equal to the maximum diameter thereof, said basket further comprising a series of anchoring legs which at one end of the basket protrude outwardly at an angle to the axis of the solid of revolution, each leg formed at its free end with an outwardly bent hook, and having a S-shape with a pronounced outward curvature immediately adjacent the hook.
Specification