Walter Keller, D.O. has been Medical Director of Mercy Hospital Hyperbaric Oxygen Therapy and Wound for 9 years. This center has grown from one room and two nurses to a total staff of sixteen and 6 rooms with 2 Hyperbaric chambers. Working with these Ulcers from Venous hypertension and Diabetic ulcers that have not healed in months to years. The Wound Care Center sees Decubitus ulcer and other ulcers/wound from surgery to Trauma. Our goal has been to heal ulcers/wounds with good quality and rapid healing in modern modalities. The staff prides itself that we have become the experts in Maine.