Double lumen hemodialysis catheter

Claim 1

A double lumen hemodialysis catheter, comprising a unitary straight tube the periphery of which in transverse cross section defines a single closed plane curve at any point along the entire straight tube, an internal divider extending along a longitudinal portion of said tube and forming said tube into a blood intake lumen and a blood return lumen, one end of said blood return lumen extending beyond the associated end of said blood inlet lumen a distance sufficient to prevent mixing of the returned blood with the blood taken in, the one end of said blood return lumen being beveled with the extending from the lumen periphery opposite said divider and rearward of the distal end toward the distal end and said divider, the associated end of said blood inlet lumen being beveled with the bevel extending from the lumen periphery opposite said divider and rearward of the associated distal end toward the associated distal end and said divider, the distal end of said blood inlet lumen terminating rearward of the juncture of the blood return lumen bevel and the associated lumen periphery each of said lumens defining blood flow paths parallel one to the other along the entire length thereof and at the ends thereof such that blood entering said intake lumen and blood leaving said return lumen enter and exit the associated blood vessel in a direction substantially parallel to the vessel wall.