Patient: Male, 62 years old, with arthritis in both knees, chronic slight pain and inability to straighten, especially in the left leg. This time the condition was a strange sound in the left knee joint when walking and pain when walking. It has been about a week. I have been seen at the Department of Traditional Chinese Medicine and Orthopedics. I had conservative treatment and took Chinese herbal medicine for a week, but the doctor said that the condition would still be serious in the long run and suggested knee replacement surgery. 1. Doctor: Hello, the risk of this surgery is manageable and varies greatly from hospital to hospital and from doctor to doctor, while bilateral replacement is relatively less expensive and slightly more risky. If you have the conditions and high expectations for the surgery, you can consider making an appointment with a top specialist at Peking Union Medical College Hospital to have bilateral knee surgery.