Summa Health System is closing Wadsworth-Rittman Hospital's inpatient units and converting St. Thomas Hospital's emergency department into a primary-care practice in a sweeping systemwide overhaul. Summa President and Chief Executive Thomas J. Strauss said the decisions were needed to be "proactive and forward-thinking about the future of the delivery of health care." "These are really important changes and not easy ones but reflect what we think is the evolution of our industry," he said. As part of the changes announced Tuesday morning, Wadsworth-Rittman Hospital will end all inpatient services within the next three to five months.