07695450 is referenced by 6 patents and cites 57 patents.

A catheter for hemodialysis comprises a flexible catheter tube defining a plurality of separate lumens. The catheter defines an arc angle of generally U-shape in its natural, unstressed configuration. Thus, the catheter may be implanted with a distal catheter portion residing in a vein of the patient, the distal catheter portion being of substantially the shape of the vein in its natural, unstressed condition. Also, a proximal catheter portion resides in a surgically created tunnel extending from the vein and through the skin of the patient, this section of the catheter also being typically in its natural, unstressed condition. Thus blood may be removed from the vein through one lumen of the catheter, and blood may be returned to the vein through another lumen of the catheter, while the catheter is subject to long term indwelling in the body. Improved results are achieved because of the lack of mechanical stress in the shape of the catheter, which stress causes the catheter to press unduly against adjacent tissues.

Title
Multiple lumen catheter for hemodialysis
Application Number
8/412114
Publication Number
7695450 (B1)
Application Date
March 28, 1995
Publication Date
April 13, 2010
Inventor
W Kirt Nichols
Columbia
MO, US
John C Van Stone
Columbia
MO, US
Zbylut J Twardowski
Columbia
MO, US
Agent
Finnegan Henderson Farabow Garrett & Dunner
Assignee
Curators of the University of Missouri The University of Missouri
MO, US
IPC
A61M 31/00
View Original Source