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High flow catheters

  • US 9,050,435 B2
  • Filed: 03/22/2011
  • Issued: 06/09/2015
  • Est. Priority Date: 03/22/2011
  • Status: Active Grant
First Claim
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1. A flexible catheter for fluid access to a vascular system, the catheter comprising:

  • a hub; and

    an elongated conduit comprising a flexible polymer, a proximal end, a distal end, and at least one lumen therein extending from the proximal end to the distal end, the proximal end coupled to the huh and the distal end having an opening in communication with the at least one lumen, the at least one lumen comprising;

    a proximal lumen section at the proximal end of the conduit, a distal lumen section at the distal end of the conduit, and an intermediate lumen section extending between said proximal and distal lumen sections;

    wherein a cross-sectional dimension of the intermediate lumen section is less than a cross-sectional dimension of the distal lumen section, and the cross-sectional dimension of the intermediate lumen section is less than a cross-sectional dimension of the proximal lumen section, and the cross-sectional dimension of the intermediate section is less than a cross-sectional dimension of the distal end opening; and

    wherein the elongated conduit comprises a first wall and a second wall, the first wall having a proximal section, an intermediate section, and a distal section, the intermediate section of the first wall having a wall thickness that is less than a proximal section of the first wall, and the intermediate section of the first wall having a wall thickness that is less than the distal section of the first wall, the second wall having a uniform wall thickness along the entire length of the elongated conduit.

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