Patent ID: 8613753

Claim:
A central line vena cava filter catheter medical device, comprising: a central venous line catheter body having a first opening in communication with a first fluid flow lumen, and a second opening in communication with a second fluid flow lumen; and a vena cava filter member circumferentially coupled about a distal end of the central venous line catheter body and having a first end coupled circumferentially in fixed relation to the central venous line catheter body and a second end circumferentially moveably coupled to the central venous line catheter body, the vena cava filter member consisting of a plurality of struts configured to form a generally frustroconical proximal section of the vena cava filter member tapering proximally and having proximal interstitial openings, and a generally frustroconical distal section of the vena cava filter member tapering distally and having distal interstitial openings, the frustroconical proximal section having a length that is greater than or less than a length of the frustroconical distal section, each of the proximal interstitial openings having an open surface area either greater than or less than the open surface area of each of the distal interstitial openings; the vena cava filter member being positioned generally intermediate the first opening and second opening and configured to be expanded in a patient's blood vessel such that a transverse dimension of the filter decreases in the direction of the patient's blood flow to collect thrombi, wherein the vena cava filter member centers the central venous line catheter body within a blood vessel lumen.