Thin film wound dressing

A composite wound dressing and delivery apparatus comprising:

• a substantially transparent dressing layer having a lower surface and an upper surface, the lower surface coated with a pressure sensitive adhesive such that the dressing layer may form a fluid tight seal over a wound to define a reservoir in which a negative pressure may be maintained;
• a substantially transparent backing layer adhered to the lower surface of the dressing layer in a releasable manner;
• a substantially transparent delivery layer adhered to the upper surface of the dressing layer in a releasable manner;
• a vacuum port centrally located on the dressing layer, the vacuum port adapted to provide fluid communication between a vacuum source and the reservoir through the dressing layer;
• and
• a targeting grid on any of the dressing layer, backing layer and the delivery layer, the targeting grid including regularly spaced reference marks along at least two axes extending from the vacuum port, and numerical markers corresponding to units of a standard measurement system, the numerical markers identifying a number of the units that is twice the distance from a center of the vacuum port;
• wherein the backing layer comprises a first identifier prominently visible thereon and the delivery layer comprises a second identifier obscured by the backing layer such that the second identifier is revealed by the removal of the backing layer, the first and second identifier adapted to indicate an order in which the backing layer and delivery layer should be removed from the dressing layer.