The optimal cut-off points for ultrasonography-detected synovial thickness and effusion indicative of knee osteoarthritis have been determined in a community-dwelling cohort of men (n = 152) and women (n = 147) from the UK. ‘Normal’ effusion ranges were similar for men and women, but men had a wider ‘normal’ range for synovial hypertrophy than women. Optimal cut-off points for effusion were 7.4 mm and 5.3 mm for men and women, respectively, and 3.7 mm and 1.6 mm for synovial hypertrophy. A power Doppler signal was uncommon in healthy individuals in this cohort.
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Sarmanova, A. et al. Thresholds of ultrasound synovial abnormalities for knee osteoarthritis – a cross sectional study in the general population. Osteoarthritis Cartilage https://doi.org/10.1016/j.joca.2018.09.018 (2018)
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Collison, J. Ultrasound thresholds for synovial abnormalities. Nat Rev Rheumatol 15, 2 (2019). https://doi.org/10.1038/s41584-018-0143-0
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DOI: https://doi.org/10.1038/s41584-018-0143-0
