Patent ID: 9468462
Filing Date: 2016-10-18
CPC Classification: A61B,A61M

Claim Text:
1. A system comprising: a catheter comprising an elongate tubular member comprising a proximal end, a distal end, a catheter lumen extending longitudinally within the catheter, a catheter body, and a catheter tip extending distally from the catheter body, the catheter tip comprising a tapered outer surface , wherein the catheter tip comprises a tapered segment and an end segment extending distally from the tapered segment, the tapered segment comprising an inner diameter that tapers from a first inner diameter that is substantially equal to an inner diameter of the catheter body to a second inner diameter that is smaller than the inner diameter of the catheter body, and the end segment comprises a substantially constant inner diameter that is substantially equal to the second inner diameter; and an elongate tubular support cannula slidably received within the catheter lumen and comprising a proximal end, a distal end, a cannula lumen extending longitudinally within the support cannula, a support segment disposed within the catheter body, and a cannula tip extending distally from the support segment and disposed within the catheter tip, the support segment comprising an outer diameter that is substantially constant along a length of the support segment and corresponds to the inner diameter of the catheter body, the cannula tip comprising a tapered portion and an end portion extending distally from the tapered portion, the tapered portion tapering from a first outer diameter that is substantially equal to the outer diameter of the support segment to a second outer diameter that is smaller than the first outer diameter and corresponds to the second inner diameter of the catheter tip, the end portion comprising a substantially constant outer diameter that is substantially equal to the second outer diameter of the cannula tip; wherein the catheter body comprises a perforated segment comprising a plurality of apertures in fluid communication with the catheter lumen and longitudinally spaced from one another along a length of the perforated segment, and the support segment is disposed within the perforated segment of the catheter body and extends proximally from the cannula tip to at least a position longitudinally aligned with a proximal end of the perforated segment.