Effectiveness of Ultrasound Guided Platelet Rich Plasma Injections in the Sacroiliac Joint

30 to 50 milliliters of venous blood will be drawn from the patients arm with a 19 gauge ¾ inch needle using universal precautions. The venous blood will be mixed with 8 milliliters of anticoagulant citrate dextrose solution-A (ACD-A). The anti-coagulated blood will then be centrifuged for 15 minutes at 3200 revolutions per minute in the office centrifuge. This will allow plasma to separate from blood cells. The portion of centrifuged blood deficient in platelets will be extracted and discarded. Once the needle is visualized entering the joint capsule via ultrasound guidance and the physician feels resistance provided by the capsule and ligaments, 3 milliliters of PRP extract will be injected (3 inch, 22 gauge needle) into the sacroiliac joint. The needles will be properly disposed.