LOW BACK PAIN腰痛.ppt

LOW BACK PAIN Shared by gukexiaoduan ABOUT YOUR DIAGNOSIS Acute back pain usually results from an injury or an accident and lasts 1 to 7 days. Chronic low back pain may last for more than 3 months. Management of low back pain depends on the cause and duration of pain. The back is made up of vertebrae; discs between the vertebrae; the spinal cord, which contains the nerves; and surrounding structures, such as muscles and ligaments. The muscles in the back and abdomen help support the spine. If the muscles, nerves, or vertebrae are injured, pain can result. Approximately 80% of persons in the United States experience some type of low back pain during their lifetimes. Some persons have low back pain after sitting for a prolonged length of time or after reaching for an object that is out of reach. Many low back injuries are caused by twisting or other sudden movement. Some persons experience low back pain after an accident or fall. Obesity, poor posture, and weak back and abdominal muscles all contribute to low back pain. Low back pain may occur in association with diseases such as osteoarthritis, ankylosing spondylitis, Reiter’s syndrome, or fibromyalgia. A physician diagnoses low back pain by taking a medical history performing a physical examination, and possibly ordering roentgenograms (x-rays). The doctor may order blood tests to determine whether the low back pain is caused by another disorder that may cause similar symptoms. Computed tomography (CT), magnetic resonance imaging (MRI), or a bone scan may be performed if the doctor needs a clearer picture of the bones or nerves, the discs between the vertebrae, and other soft tissue. Sometimes an electromyogram (EMG), which helps identify muscle and nerve problems, may be obtained if the physician believes the back is causing numbness or tingling in the legs because of pressure on the nerves. Most of the time roentgenograms are not needed. LIVING WITH YOUR DIAGNOSIS You may experience difficulty