| 摘要 |
A wound dressing is formed from a covering release layer, a dressing layer, an indicator layer, a transparent or translucent indicator bonding layer and a transparent or translucent outer covering. The indicator layer contains a dye which changes colour on contact with water. When the dressing layer becomes saturated, water permeates the indicator layer and triggers a colour change. The colour change is visible through the indicator bonding layer and outer covering and shows a carer that the dressing needs to be replaced. |
