Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine
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Comparative Study
Rethinking Viscosupplementation: Ultrasound- Versus Landmark-Guided Injection for Knee Osteoarthritis.
Viscosupplementation, intra-articular injection of hyaluronic acid (HA), for knee osteoarthritis has fallen somewhat out of favor, with studies failing to show consistent benefits in pain reduction. Hyaluronic acid must enter the joint space to be beneficial; however, landmark-guided injection can be substantially inaccurate, especially in obese patients. We aimed to determine whether ultrasound (US) guidance to ensure needle placement for HA knee injection resulted in improved outcomes as reflected by surgery-free survival compared to landmark-guided HA knee injection. ⋯ Knee osteoarthritis treatment by viscosupplementation can be optimized by US guidance, ensuring intra-articular needle placement. Using an objective surgical outcome, our study shows that rethinking viscosupplementation to ensure intra-articular delivery improves effectiveness. Patients receiving US-guided knee HA injection were significantly less likely to undergo subsequent knee arthroplasty than patients receiving landmark-guided HA injection.