Low-Cost Platelet-Rich Plasma for Hemarthropathy

A total of 20 joints (estimated 10-15 patients) will receive injections, performed at day 0 and 3 weeks, for a total of two injections - two injections have demonstrated superior outcomes to one, and will increase our number of injections to improve the proof of feasibility. All subjects will receive ultrasound-guided intra-articular joint injections by an experienced sports medicine provider after local anesthesia with 1% lidocaine to the extra-articular structures, namely the skin and joint capsule, to increase comfort.