The changes in human synovial fluid osmolality associated with traumatic or mechanical abnormalities of the knee

Synovial fluid osmolality was determined in 22 knees at the time of arthroscopic evaluation. The arthroscopy was for traumatic or mechanical abnormality of the knee. The results indicate no significant difference in osmolality among the conditions studied, but there was a significant decrease in synovial fluid osmolality compared to the values for the normal knee. The information presented provides baseline data for various pathologic conditions and a basis for future work.