×

Coaxial venal cannula

  • US 9,925,353 B2
  • Filed: 12/12/2015
  • Issued: 03/27/2018
  • Est. Priority Date: 06/26/2007
  • Status: Active Grant
First Claim
Patent Images

1. A dual lumen cannula assembly, comprising:

  • an infusion tube defining a return lumen and having a first outer surface, a proximal end, and a distal end that includes a return aperture, at least a portion of said infusion tube comprises a first reinforcing coil;

    a drainage tube co-axially aligned with said infusion tube and having a second outer surface, a body portion, a proximal end and a distal end, said distal end of said drainage tube including a drainage site having at least one drainage aperture, at least a portion of said drainage tube comprises a second reinforcing coil, said proximal end of said drainage tube having a larger diameter than a substantial portion of said body portion of said drainage tube, and a length of said drainage tube being less than a length of said infusion tube, wherein;

    said drainage site includes a drainage member having first and second ends,said first end is attached to said distal end of said drainage tube, andsaid second end is attached to the first outer surface of said infusion tube;

    a drainage lumen defined by a space between said infusion tube and said drainage tube; and

    a connector attached to said proximal end of said drainage tube and comprising a reservoir for receiving a fluid from said proximal end of said drainage tube and a return opening that is attached to said proximal end of said infusion tube, wherein;

    a portion of said infusion tube extends through said connector and does not attach with said drainage tube at said connector,said portion of said infusion tube extending through said connector gradually distally tapers across said connector, andsaid infusion tube remains substantially coaxial with said drainage tube throughout the length of said drainage tube.

View all claims
  • 4 Assignments
Timeline View
Assignment View
    ×
    ×