Thermoplastic elastomeric hydrophilic polyetherurethane expandable catheter
US5061254A · kind A · utility
132Cited by
16References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 26, 1990 |
| Grant date | Oct 29, 1991 |
| Priority date | — |
| Expiry date | Mar 26, 2010 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61L2300/42
- WIPO fieldMedical technology
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.