Catheter tubing of controlled in vivo softening
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United States of America Patent
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Jul 13, 1993
Issued Date -
N/A
app pub date -
Aug 15, 1991
filing date -
Mar 26, 1990
priority date (Note) -
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status (Latency Note)
Importance
Abstract
A catheter tubing has a layer of a hydrophobic stiffening polymer encapsulated by a layer of hydrophilic thermoplastic base polymer. Preferred stiffening polymers are polyesterpolyether block copolymers. Preferred base polymers are thermoplastic polyetherurethanes. The encapsulated layer may be a stripe or an annular layer having base polymer layers laminated on both surfaces thereof.
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