Wound volume measuring method and device

A wound volume measuring device comprising

• a foam dressing disposed on a wound site;
• a film dressing attached to skin adjacent to said wound site to hermetically seal said wound site;
• a drain tube whose one end is in communication with a hermetically sealed space formed between said film dressing and said wound site;
• a negative pressure generating unit connected to the other end of said drain tube and supplying a negative pressure to said hermetically sealed space;
• a flow sensor for measuring a flow of fluid discharged from said hermetically sealed space by said negative pressure;
• and
• a volume calculating part for calculating a volume of said wound site based on the flow of said fluid measured in said flow sensor,
• wherein the hermetically sealed space comprises a first hermetically sealed space between the film dressing and the foam dressing and a second hermetically sealed space of the wound site on which the foam dressing is disposed,
• wherein when the fluid in the first hermetically sealed space is discharged to reduce the first hermetically sealed space, and the hermetically sealed space is disappeared, the film dressing is compressed onto the foam dressing,
• wherein even after the film dressing is compressed onto the foam dressing, the negative pressure is continuously supplied into the hermetically sealed space, the film dressing and the foam dressing are compressed onto the surface of the wound site,
• wherein the step of calculating the volume of said wound site calculates the volume of said wound site by integrating the flow of the fluid discharged in the process that said film dressing and said foam dressing are compressed onto the surface of said wound site,
• when the negative pressure is supplied into the hermetically sealed space, the flow of the fluid discharged in the process that the film dressing is compressed onto the foam dressing is formed to be larger than the flow of the fluid discharged in the process that the film dressing and the foam dressing are compressed onto the surface of the wound site,
• wherein said volume calculating unit calculates the volume of said wound site by integrating the flow of said fluid measured from the time when the measured flow of said fluid becomes lower than the critical flow, and
• wherein the critical flow can be set to a value between a flow of the fluid discharged in the process that the film dressing is compressed onto the foam dressing, and a flow (Q′2) of the fluid discharged in the process that the film dressing and the foam dressing are compressed onto the surface of the wound site.