Transport of Radioactive Sodium Across the Synovial Membrane of Normal Human Subjects.

Abstract
The clearance of Na24 through the synovial membrane of knee joints of normal human subjects was found to be significantly more rapid in women than in men. There was suggestive evidence that Na24 clearance in women depended upon factors associated with the menstrual cycle. The removal of Na24 from the joint space is less rapid than it is from the subcut. and muscle tissue.