Treating traumatic burns or blisters of the skin
US6348212B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 18, 1999 |
| Grant date | Feb 19, 2002 |
| Priority date | — |
| Expiry date | May 18, 2019 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2013/00676
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Blisters of the skin are treated by applying to the skin over the blister a flexible moisture-containing hydrophilic hydrogel patch that includes a backing support such as paper, cloth or plastic and a water-based hydrogel layer applied to the backing. The hydrogel layer comprises a hydrophilic natural or synthetic polymer to provide body dispersed in water and can be a tacky adhesive. The polymer can comprise any high molecular weight hydrophilic carbohydrate such as karaya, cornstarch, or a kelp gel and/or a synthetic hydrophilic polymer such as polyacrylamide or polyacrylic acid. A humectant such as a polyhydric alcohol, keeps the gel layer moist. A solute such as salt, protein, sugar or an alcohol is dissolved in the water in a quantity sufficient to raise the osmotic pressure enough to maintain the hydrogel layer in a hypertonic state with respect to the blister. The hydrogel which hydrates the normally dry upper layer of skin forms a hydrophilic bridge with the patient's skin that allows fluid to be drawn by osmotic pressure from the blister through the normally dry stratum corneum into the patch. In addition, the hydrogel very quickly significantly dimishes the pain secondar…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.