Patient: I have had rheumatoid arthritis for more than 20 years, and I have deformed joints in my hands and feet. I wonder if it is possible to replace the elbow joint in addition to the knee joint. I wonder if this technology is mature in our country. My condition is basically controlled by medication and my rheumatoid factor is normal, but in winter my knee joint is very numb and the blood does not seem to flow. I hope to improve my condition through joint replacement, but I wonder if the elbow joint can be replaced? Kou Bolong, Bone and Joint Center, Peking University People’s Hospital: Rheumatoid arthritis, joint deformity, artificial hip and knee joint replacement surgery is very mature in China, compared to elbow joint replacement cases are less, generally elbow joint function in the basic can live on their own, can be flexed position about 90 degrees, can eat by themselves with a spoon, etc., then you can temporarily not joint replacement surgery treatment. If the joint is effectively treated conservatively and there is no pain, or if the pain can be controlled by medication, conservative treatment can be given first, and then artificial joint replacement surgery can be performed to improve the condition if necessary. Of course, artificial joint replacement can be performed on the elbow joint.