Tip configurations for multi-lumen catheter

摘要

Multi-lumen catheters with improved tip configurations, including a triple-lumen catheter which may be useful for apheresis. In one variation, the catheter has three lumens with distal openings angularly spaced apart and staggered axially with respect to one another. In another variation, the catheter has two lumens exiting distally and one centrally positioned lumen exiting proximally. A third variation is a catheter with a single distal opening and two proximal openings. The staggered lumen openings along the axial length of the catheter may decrease recirculation while maximizing flow rates.

主权项

1. A multi-lumen catheter, comprising:
a first interior wall separating a first lumen from a second lumen; a second interior wall separating the first lumen from a third lumen; a third interior wall separating the second lumen from the third lumen; a first distal opening in fluid communication with the first lumen; a second distal opening in fluid communication with the second lumen; and a third distal opening in fluid communication with the third lumen, the third distal opening positioned axially side-by-side the second distal opening at a distal end of the catheter, the first distal opening positioned proximal of the second and third distal openings.