Synovectomy is primarily conceived to satisfy a causal indication, by removal of the diseased synovial sac as the principal seat of the local pathologic changes of the joint. It has been justly reasoned by Swett and others that even under the aspect of being a systemic condition, chronic joint disease is duly benefited by a procedure that removes a local focus of infection in the joint, certainly not less potent than other foci situated more remotely.
In view of the great frequency and variety of cases of chronic arthritis, a careful selection is urged by Swett, Ellis and others for the performance of this operation, and very wise and judicious restrictions have been drawn, limiting the indication to certain types and certain clinical phases.
Jones considers as suitable a definite type of low grade infection in which pathologic lesions still remain after months or years, and which is characterized by