Accuracy of blind versus ultrasound-guided suprapatellar bursal injection.

RESULTS.: US-guided HA injection exhibited a significantly greater accuracy (48 of 50 knees, 96.0%) than blind injection (41 of 49 knees, 83.7%). Bum Park Y, Ah Choi W, Kim YK, Chul Lee S, Hae Lee J. J Clin Ultrasound. 2011 Oct 28. [Epub ahead of print] PMID: 22033897