Patent ID: 9693850
Date: 2017-07-04
CPC Classifications: A61F,A61M

Claim:
1. A vena cava filter catheter medical device comprising: a catheter body having a distal end and a proximal end; a vena cava filter member circumferentially coupled proximal to the distal end of the catheter body and having a fixed end coupled circumferentially in fixed relation to the catheter body and an open end circumferentially surrounding the catheter body and opening toward the distal end of the catheter body, the vena cava filter member comprising a plurality of struts configured to form a generally frustroconical filter section of the vena cava filter member tapering proximally from the open end to an apex at the fixed end of the generally frustroconical filter section, the plurality of struts further configured to form interstitial openings; the vena cava filter member being diametrically expandable in a patient's blood vessel with the open end expanding towards the distal end of the catheter body such that blood flows into the open end, is filtered by the plurality of struts to collect thrombi; the plurality of struts includes a first plurality of struts, a second plurality of struts, and a third plurality of struts where the first plurality of struts attach to the fixed end of the vena cava filter member and extend axially along the longitudinal axis of the catheter body and at least some of the second plurality of struts connect at one end to an end of the first plurality of struts opposite the attachment to the fixed end, the second plurality of struts connecting to form opposing apices and extending circumferentially around the catheter; the second plurality of struts connect to form a plurality of successive zigzag-shaped structures connected to an end of the first plurality of struts and the opposing apices, the zigzag-shaped structures forming conjoined ring-like structures about the circumference of the filter member; the second plurality of struts further forms a lattice-like pattern upon diametric expansion of the filter member, where the lattice-like pattern projects axially along the longitudinal axis of the catheter body tapering to form at least one petal-like projection terminating in a terminal apex member; and the third plurality of struts is configured to form a circumferential ring member connected to the terminal apex member of each petal-like projection at a juncture with the terminal apex member.