Embolus blood clot filter delivery system

摘要

A blood filter delivery system for delivering a blood filter into a vein includes a push rod for pushing the blood filter through and out of a catheter, the push rod having a filter positioning assembly on one end. The filter positioning assembly includes positioner members, which retain anchor members of the filter. The filter positioning assembly can position the end of the delivery catheter near the blood vessel centerline before releasing the filter's anchor members, thereby helping to align the blood filter along the centerline of the blood vessel.

主权项

1. A blood filter delivery apparatus for delivering a blood filter into a blood vessel, the blood filter including a plurality of appendages, the apparatus comprising:
a) a catheter having a free end portion with an opening and a catheter wall with an inner surface surrounding a catheter lumen; b) a filter positioning assembly situated with the filter within the catheter lumen to define a stored position, the filter positioning assembly including a plurality of positioner members coupled to the assembly, each of the plurality of positioner members having an end that is connected to an appendage within the catheter lumen, wherein the ends of the positioner members and the appendages are connected within the catheter lumen; c) wherein the filter is positioned closer to the catheter opening than the positioning assembly; and d) a pusher that engages the positioning assembly and filter inside the lumen, wherein the positioning assembly and filter are movable between said stored position within the catheter lumen and a preliminary dispensed position wherein the positioning members engage the vessel wall while at least a portion of some of the filter appendages remain inside the catheter lumen.