creator Burns, Marvin creator Ogden, Charles Thomas creator Rodzen, Richard A. A tip on a catheter is bent to steer the distal end of the catheter by displacing a control fluid within an elongated fluid conduit to stretch one longitudinally extending side of the tip relative to an opposite longitudinally extending side of the tip. The stretched side bends about the shorter side with a radius of curvature larger than the radius of curvature for the shorter side of the tip. A longitudinal restraining means may be applied to the tip to assure that the tip always bends in the same direction with the fluid displacement. On the other hand, other catheters may be bent in several and predetermined directions by providing a plurality of discrete fluid control conduits and by establishing a fluid pressure differential in at least one of the conduits to cause its associated side to lengthen and bend relative to a portion of the tip associated with another control conduit. The catheter may be small in dimension, made inexpensively and restrained against expanding in diameter by a circumferential restraining means. Submitted by Aric Ahrens (ahrens@iit.edu) on 2011-11-04T19:35:34Z No. of bitstreams: 1 3773034.pdf: 308766 bytes, checksum: be44298be2243937b023bd3f827374cc (MD5) Made available in DSpace on 2011-11-04T19:35:34Z (GMT). No. of bitstreams: 1 3773034.pdf: 308766 bytes, checksum: be44298be2243937b023bd3f827374cc (MD5) Previous issue date: 1973-11-30 IIT Research Institute 2009-04-30 1973-11-30 3,773,034 http://hdl.handle.net/10560/2295 en United States Patent Patent reformatted digital application/pdf No Copyright - United States http://rightsstatements.org/page/NoC-US/1.0/ Open Access