Flexible tubes for fixed peripheral venous cannulas
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United States of America Patent
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Issued Date -
Jul 21, 2005
app pub date -
Nov 8, 2004
filing date -
May 8, 2002
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The invention concerns flexible tubes for delivering solutions for perfusion or injection into the peripheral vascular system. The invention is characterized in that said flexible tubes are manufactured by coextrusion process from a composite polyamide and polyurethane laminate, the inner layer facing the lumen and the outer layer being respectively formed with polyamide and polyurethane. The desired properties of said flexible tubes, such as buckling stability, flexural rigidity or free flow capacity, can be adjusted and customized on the basis of the wall thickness distribution which, preferably has a PA/PUR ratio of 50:50 to 70:30, and on the basis of the Shore hardness of the initial constituents.
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