A - Human Necessities – 61 – M
Patent
A - Human Necessities
61
M
128/93
A61M 25/00 (2006.01) A61M 25/06 (2006.01)
Patent
CA 1257166
- 35 - CATHETER ASSEMBLY Abstract A catheter assembly comprises a cannula having proximal and distal end portions and a longitudinal duct having an initial inner cross-section. The duct increases in cross-section when at least a part of the distal end portion of the cannula is inserted into a body of a living subject and maintained in contact with the body, and/or when the duct is contacted by an aqueous liquid, fox a period of time sufficient for an enlarged duct cross-section to form. A hub has a passageway from a first to a second end thereof. The passageway has a cross-sectional area throughout at least substantially equal to 125% of the initial inner cross-section of the duct. A proximal end portion of the cannula is attached to the first end of the hub with a passageway through the hub in flow communication with the duct in the proximal and portion of the cannula. The attaching is such that the cross-section of the duct adjacent the proximal end portion, following formation of the enlarged duct cross-section, is throughout at least substantially equal to the cross-sectional area of the passageway. Increased flow is provided through the hub whereby advantage can be taken of the expansion of the duct.
520661
Hardy Dwayne E.
Walker Jack M.
Kirby Eades Gale Baker
Menlo Care Inc.
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