A wearable, battery-powered device designed to actively promote continuous diffusion of oxygen (CDO) in a wound to help heal various types of wounds (e.g., arterial, venous, diabetic or pressure ulcers; burns; postoperative or traumatic wounds). It is intended to concentrate oxygen (O2) from ambient air and pump it through an included sterile delivery tube intended to be secured to the wound bed, which is typically covered by an absorbent and occlusive dressing. It is intended to be used continuously over a prescribed period, being discarded and replaced along with the dressing as required. This is a single-use device.