Method of preventing blockage in catheters
US5071649A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 4, 1990 |
| Grant date | Dec 10, 1991 |
| Priority date | — |
| Expiry date | May 4, 2010 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K38/49
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
In accordance with the present invention, a method is provided for preventing blockage of a catheter. The method comprises admixing an effective concentration of a surface-active copolymer to the fluid being delivered through the catheter. The surface-active copolymer can be an ethylene oxide-propylene oxide condensation product with the following general formula: EQU HO(C.sub.2 H.sub.4 O).sub.b (C.sub.3 H.sub.6 O).sub.a (C.sub.2 H.sub.4 O).sub.b H PA0 wherein a is an integer such that the hydrophobe represented by (C.sub.3 H.sub.6 O) has a molecular weight of approximately 950 to 4000, preferably between approximately 1200 to 3500, and b is an integer such that the hydrophile portion represented by (C.sub.2 H.sub.4 O) constitutes approximately 50% to 90% by weight of the compound.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.