Thermoplastic elastomeric hydrophilic polyetherurethane expandable catheter
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United States of America Patent
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Oct 29, 1991
Issued Date -
N/A
app pub date -
Mar 26, 1990
filing date -
Jun 21, 1989
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A melt extruded catheter of thermoplastic elastomeric hydrophilic polyurethane synthesized from a diisocyanate, polyethyleneoxide glycol of high molecular weight and a chain extender expands to a larger lumen size when contacted with an aqueous liquid. The catheter may include an antithrombogenic agent, antiinfective agent and radiopaque agent. The hydrophilic polyurethane may be synthesized by one-shot bulk polymerization, and may be melt extruded into the catheter tubing, and may encapsulate a stripe of a stiffening polyurethane.
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