A method and apparatus for measuring a volume of a wound are described, the method comprising the steps of: applying a dressing over a wound, the volume of which is to be measured, the dressing including at least a sealing drape over the wound so as to create a sealed wound cavity； creating a vacuum in said wound cavity by vacuum pump means so as to produce a predetermined vacuum in the wound cavity； measuring a volume of air extracted from said wound cavity in producing said predetermined vacuum； and, calculating a volume of said wound.
