A - Human Necessities – 61 – M
Patent
A - Human Necessities
61
M
128/93
A61M 5/158 (2006.01) A61M 25/00 (2006.01) A61M 25/06 (2006.01)
Patent
CA 2016772
An over-the-needle catheter assembly is provided in which a restriction of the inner diameter of the catheter tube is formed in the proximity of the needle hub. The restriction is formed by heating a portion of the catheter tube to the softening point of the catheter material, stretching the catheter tube to cause the heated portion of the catheter tube to tighten about an inner needle or mandril, then releasing the stretching force to allow the stretched portion to relax, leaving a small gap between the inner wall of the catheter tube and the outer diameter of the insertion needle. The small gap is preferably sized to be on the order of the size of the diameter of blood cells to restrict the flow of liquids past the restriction and into the catheter hub.
Chang Joseph
Egolf William
O'neil Michael
Panzera Mark
Chang Joseph
Egolf William
Medex Inc.
O'neil Michael
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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