Patent ID: RE41462

Claim:
A co-axial dual lumen catheter comprising: a main section having proximal and distal ends and including a first outer tube; a tip section at said distal end; an attachment at said proximal end for anchoring the catheter to a patient immediately adjacent an incision where the catheter entry is effected; a U-shaped proximal portion having a distal end attached to the main section at said proximal end of the main section and having a proximal end, the proximal portion including a second outer tube; a junction attached to the proximal end of the proximal portion; an inner tube extending loosely inside the first and second outer tubes and anchored at the tip and the junction to define a return lumen and combining with the first and second outer tubes to define an annular intake lumen; intake and outlet tubes attached to the junction, the tubes extending generally in parallel with the main section and to one side of the main section and being coupled to the respective intake and return lumens; and the inner tube being thin walled relative to the wall thickness of the first outer tube, and the second outer tube having a greater cross-sectional area than the first outer tube.