Dual lumen catheter
AssigneeNuwellis, Inc.
InventorDavid Lerner
Life of this patent
Estimating the term…
Abstract
A catheter may include a withdrawal lumen wall extending around a withdrawal lumen. The withdrawal lumen may have a withdrawal lumen profile. The catheter may include an infusion lumen wall coupled with the withdrawal lumen wall. The infusion lumen wall may extend around an infusion lumen. The infusion lumen may have an infusion lumen profile smaller than the withdrawal lumen profile. A flexible septum may extend between the withdrawal lumen and the infusion lumen. The flexible septum may isolate the withdrawal lumen from the infusion lumen. In another example, a blood filtration system may monitor blood flow velocity within vasculature. The blood filtration system may guide operation of a blood pump or a filtrate bump based on the blood flow velocity within the vasculature.
Claims11
A catheter, comprising:
- an infusion lumen wall extending to an infusion lumen tip, wherein:
- the infusion lumen wall surrounds an infusion lumen;
- the infusion lumen is in fluidic communication with an infusion line of a blood filtration system;
- and
- the infusion lumen discharges fluid at the infusion lumen tip, the fluid supplied by the blood filtration system;
- a withdrawal lumen wall extending from a proximal section to a withdrawal lumen tip, wherein:
- the withdrawal lumen tip is included in a distal section of the withdrawal lumen wall;
- the withdrawal lumen wall surrounds a withdrawal lumen;
- the withdrawal lumen is in fluidic communication with a withdrawal line of the blood filtration system;
- the infusion lumen is isolated from the withdrawal lumen;
- the withdrawal lumen is located and arranged to receive fluid from vasculature of a patient at the withdrawal lumen tip;
- the withdrawal lumen wall includes a polymeric material;
- the withdrawal lumen wall has a first structural support section including one or more structural supports embedded in the polymeric material;
- the withdrawal lumen wall has a second structural support section including the one or more structural supports, wherein the second structural support section is separated from the first structural support section by a first trimming section of the polymeric material located between the first structural support section and the second structural support section, wherein the first trimming section includes a continuous fluid-impervious outer wall section and does not include the one or more structural supports, and wherein the first trimming section is included in a plurality of trimming sections, which include a continuous fluid-impervious outer wall section and which do not include the one or more structure supports, that are included in the distal section of the withdrawal lumen wall and are individually arranged and spaced apart from each other to ease cutting during user-customization of a length of the withdrawal lumen wall between a hub of the catheter and the withdrawal lumen tip;
- the withdrawal lumen wall extends beyond the infusion lumen tip to longitudinally offset the withdrawal lumen tip from the infusion lumen tip;
- the withdrawal lumen wall includes a transition section extending between the proximal section and the distal section;
- and
- the catheter includes a central axis, and the transition section extends across the central axis of the catheter.
Dependencies are inferred from the claim text.