Frictionless catheter

Abstract

A catheter may include a tubular member having a lumen and an outer surface, a sleeve configured to be positioned in the lumen in a retracted configuration and to evert over at least a portion of the outer surface in an everted configuration, and a filament configured to retract the sleeve into the retracted configuration. The catheter may include an aperture proximal of a distal end, where the filament extends through the aperture from the lumen. A pull member may be on a distal end of the filament. The filament may be looped, coiled, and/or bunched in the catheter when the sleeve is in the retracted configuration. A shuttle may be attached to a distal end of the sleeve, where the shuttle includes a tubular member configured to maintain patency of the sleeve, and the filament engages the shuttle to retract the sleeve into the lumen.

1 . A catheter having a proximal opening and a distal opening and configured to allow passage of a fluid into the proximal opening and out of the distal opening, the catheter comprising:
 a tubular member having a lumen between the proximal opening and the distal opening and an outer surface;   a sleeve configured to be positioned in the lumen of the tubular member in a retracted configuration and to evert over at least a portion of the outer surface of the tubular member in an everted configuration;   a proximal member secured to a proximal portion of the sleeve, wherein the proximal member is configured to slide over at least a portion of the tubular member to evert the sleeve over the tubular member;   a pull member configured to retract the sleeve into the retracted configuration.