| 摘要 |
A patient support surface 25, especially for a mattress, comprises sheet-like material, eg metal or plastics, having downwardly projecting conical protrusions over its surface, each terminating at its lower portion in an opening, whereby drainage and air circulation are improved without sacrificing rigidity. The protrusions and holes may be formed by a computer controlled press and arranged so as to minimise the remaining horizontal area of the sheet. |
