Your doctor will diagnose delirium based on your medical history, tests to assess mental status and the identification of possible contributing factors. You will be asked about personal and family medical histories, including any history of mental illnesses. This information will help your doctor to decide on the best treatment. These tests will include:
Mental status assessment: your doctor will assess awareness, attention and thinking either informally (through conversation), or with tests that assess mental state, confusion, perception and memory.
Physical and neurological exams: your doctor will perform a physical exam, and check for signs of health problems or underlying disease. A neurological exam will also be conducted to check vision, balance, coordination and reflexes and determine if a stroke or another neurological disease is causing the delirium.
Other tests: blood and urine tests, as well as brain-imaging tests may be used when a diagnosis cannot be made with other available information.