Micro-negative pressure foam dressing and manufacturing method thereof
US11529262B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 29, 2021 |
| Grant date | Dec 20, 2022 |
| Priority date | — |
| Expiry date | Mar 29, 2041 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2205/364
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A micro-negative pressure foam dressing and a manufacturing method thereof is disclosed, the dressing comprises a exothermic agent layer, an isolation component covering on the exothermic agent layer, an elastic memory piece disposed under the exothermic agent layer, a liquid absorbing negative pressure pad disposed under the elastic memory piece, a contact layer disposed under the liquid absorbing negative pressure pad, a sealing film disposed between the liquid absorbing negative pressure pad and the contact layer, and a bottom release film disposed under the contact layer; and in this invention, heat generated by a exothermic agent layer causes an elastic memory piece to expand downward to compress a foam layer, and after the heat dissipates completely, a micro-negative pressure is generated since a sealed environment is formed by a sealing film, a contact layer and a wound surface without a need for the VSD negative pressure technology.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.