Patent ID: 7504549

Claim:
An occlusive dressing for a chest wound comprising: a flexible sheet for providing a fluid and debris barrier; an adhesive layer carried on a bottom side of said sheet for adhering said sheet to skin surrounding the chest wound; a collection chamber included in said adhesive layer defined by the complete exclusion of adhesive from a generally central area of said sheet for being positioned over the wound to receive fluid from the wound; and, a drainage channel included in said adhesive layer defined by the complete exclusion of adhesive from a selected area of said sheet extending radially outward from said collection chamber to a drain outlet at a peripheral edge of said sheet to drain fluid from said collection chamber out from under said sheet; wherein said collection chamber and drainage channel are operable between an open position allowing fluid to flow outward from said collection chamber through said drain outlet, and a closed position with said sheet collapsed against the skin to prevent fluid intake through said drain outlet to prevent fluid from building pressure within the chest cavity.