Catheters and methods

Details Catheters and methods Catheters and methods

A - Human Necessities

61

M

128/93

A61M 25/00 (2006.01) A61M 25/01 (2006.01)

Patent

CA 1319305

ABSTRACT OF THE DISCLOSURE Catheter tubes of elastomeric material having novel lumen shapes which prevent occlusion and accomodate continued liquid flow even when kinked. Also, catheter tube slit valves are disclosed, the walls of which are not chemically weakened. Symmetrical and asymmetrical versions of said slit va1ves are disclosed. Combinations of highly reliable slit valves and catheter tubes are disclosed. Independently operable multi-lumen catheter assemblies of synthetic material, such as silicone rubber are disclosed, wherein the distal end of each lumen is normally closed by a three-position slit valve formed in a catheter tube covering. Multi-lumen catheters, and related methods, are also disclosed wherein the lumens are internal at the proximal and distal ends of the catheter tube but comprise separate tubes in between whereby, following placement of the distal end of the catheter tube in the body cavity of a patient, the unified proximal end of the tube is manipulated, sometimes subcutaneously, with the ultimately exposed tubes being thereafter severed and each equipped with a hub at a convenient exposed body site for selective independent passage of influent and effluent liquid along each lumen.

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