musculoskeletal and connective tissue disorders
How To Aspirate or Inject a Prepatellar Bursa
Tips and Tricks for Aspirating or Injecting a Prepatellar Bursa
Consider doing ultrasonography if there is no obvious large effusion. When inspecting bursal fluid, consider the following: The blood due to a traumatic needle insertion tends to be nonuniformly bloody and tends to clot. Nontraumatic fluid should be evaluated by polarized light microscopy for the presence of crystals. 