Can hyperbaric oxygen therapy be used to treat CLL ?? My Dad is 92 and mild diabetic. He was holding his own until a lymph gland swelled up under his arm; they did radiation; the tumor burst and is now an open wound under his arm. They are doing wound care; three times per week; but it is extremely painful for him. I know that the Hyperbaric treatments are beneficial for numerous wounds and ailments. Could it possibly be beneficial to heal this open would under his arm ?