Multi-layer wound dressing
US5759570A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 7, 1996 |
| Grant date | Jun 2, 1998 |
| Priority date | — |
| Expiry date | Nov 7, 2016 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61L2300/414
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The invention provides wound dressings comprising a molecular filtration membrane having a maximum pore size in the range of from 0.001 .mu.m to 0.5 .mu.m, and preferably in the range of from 0.01 .mu.m to 0.25 .mu.m. The wound dressings may also comprise an absorbent layer atop the molecular filtration membrane and/or a wound contact layer of wound-friendly bioabsorbable material for contacting the wound. In use, the molecular filtration membrane retains high molecular weight biopolymers and wound healing factors at the wound surface while excluding bacteria and allowing rapid egress of wound exudate through the membrane into the absorbent layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.