A sponsored article in The Union describes the Sierra Nevada Memorial Hospital Center for Wound Healing and Hyperbaric Medicine as using HBO Therapy to activate white blood cells to fight infection and help blood carry more oxygen to organs and tissue to promote wound healing. According to John Quaglia, Hyperbaric Medicine Technician at Dignity Health Sierra Nevada Memorial Hospital, the center primarily uses HBOT to treat diabetic ulcers below the knee, compromised surgical wounds, osteomyelitis (bone infection), and tissue injury due to radiation. In the chamber, air pressure is increased 2 to 3 times higher than normal, resulting in as much as ten to fifteen times the usual amount of oxygen being dissolved in the patient's blood. Sessions last between one hour and fifteen minutes to two hours and twenty minutes, five days per week, with physicians ordering sets of either 20 or 30 treatments at a time. Medicare plus a secondary insurance typically covers medical costs after standard therapy has been confirmed unsuccessful.