{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,26]],"date-time":"2026-09-26T11:02:11Z","timestamp":1790420531341,"version":"4.1.0"},"reference-count":33,"publisher":"Wiley","issue":"8","license":[{"start":{"date-parts":[[2015,8,1]],"date-time":"2015-08-01T00:00:00Z","timestamp":1438387200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["J of Ultrasound Medicine"],"published-print":{"date-parts":[[2015,8]]},"abstract":"<jats:sec><jats:title>Objectives<\/jats:title><jats:p>To compare the effects of ultrasound\u2010guided platelet\u2010rich plasma (PRP) and whole blood (WB) injections in patients with chronic hamstring tendinopathy.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>In a prospective double\u2010blind randomized controlled trial, PRP or WB was injected under ultrasound guidance into the proximal hamstring tendon in a cohort of patients with clinically suspected hamstring tendinosis. Questionnaires were administered before injection and 2, 6, and 12 weeks and 6 months after injection. Pain and function outcomes were measured via the Modified Harris Hip Score (MHHS), Hip Outcome Scores for activities of daily living (ADL) and sport\u2010specific function, and International Hip Outcome Tool 33 (IHOT\u201033). Diagnostic ultrasound was used to compare preinjection and 6\u2010month postinjection tendon appearances.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>The WB group showed greater improvements in pain and function over the PRP group before 12 weeks, whereas the PRP group showed improved outcomes over WB at 6 months. None of these between\u2010group outcome measures, except 6\u2010week IHOT\u201033, showed statistical significance. Comparing preinjection and 6\u2010month scores, the PRP group showed significant improvements in ADL (<jats:italic>P<\/jats:italic> = .018) and IHOT\u201033 (<jats:italic>P<\/jats:italic> = .28) scores, whereas the WB group showed no significant improvements from baseline. The WB group showed significantly decreased pain with 15\u2010minute sitting (<jats:italic>P<\/jats:italic>= .008) at 6 months. Ultrasound imaging showed no significant differences between PRP and WB group tendon appearances.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>Both PRP and WB groups showed improvements in all outcome measures at 6 months. The PRP group showed significant improvements in 6\u2010month ADL and IHOT\u201033 scores. The WB group reached significance in 15\u2010minute sitting pain. No significant between\u2010group differences were observed at any time point.<\/jats:p><\/jats:sec>","DOI":"10.7863\/ultra.34.8.1455","type":"journal-article","created":{"date-parts":[[2015,7,23]],"date-time":"2015-07-23T21:43:37Z","timestamp":1437687817000},"page":"1455-1463","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":66,"title":["Ultrasound\u2010Guided Intratendinous Injections With Platelet\u2010Rich Plasma or Autologous Whole Blood for Treatment of Proximal Hamstring Tendinopathy"],"prefix":"10.1002","volume":"34","author":[{"given":"Kathleen L.","family":"Davenport","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jose 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