A flexible sheet having an adhesive layer carried on a bottom side. A collection chamber formed in the adhesive layer by the exclusion of adhesive from a central area of the sheet for receiving fluid from the wound. A drainage channel formed in the adhesive layer by the exclusion of adhesive from a selected area of the sheet extending radially outward from the collection chamber to a drain outlet at a peripheral edge of the sheet to drain fluid from the collection chamber. The collection chamber and drainage channel having an open position allowing fluid to flow outward from the collection chamber through the drain outlet, and a closed position collapsed against the skin to prevent fluid intake through the drain outlet. A storage compartment carried by the flexible sheet including a needle and catheter for immediate access in treating a tension pneumothorax.