Non-primate vitreal replacement model
US5102653A · kind A · utility
Inventors
Key dates
| Filing date | Jan 11, 1990 |
| Grant date | Apr 7, 1992 |
| Priority date | — |
| Expiry date | Jan 11, 2010 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K49/00
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
This is a non-primate vitreal replacement process that quantitates the inflammatory response to viscoelastic agents or solutions. More specifically, the rabbit vitreal replacement process consists of the surgical replacement of a small volume of the central gel vitreous of the rabbit with a viscoelastic agent or solution, and measuring the invasion of white blood cells in the vitreous and anterior chamber at 48 hours post injection. Additional parameters measured are anterior chamber flare, haze and flare in the vitreal chamber, ocular fundus clarity, presence of iris congestion, lens involvement, corneal clarity, conjunctival congestion and conjunctival swelling. In this process, the rabbit is evaluated prior to injection of the viscoelastic agent or solution and 48 hours post injection. Each parameter is evaluated on a scale of 0 to 5. A non-inflammatory sample consists of a mean total score of equal to or less than one or a vitreal cell count less than 50 cells/mm.sup.3. This is an extremely sensitive system for detecting small amounts of inflammatory agents in viscoelastic agents or solutions. The test solution is rated as acceptable for veterinary or human use if a non-inflamm…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.