{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,12]],"date-time":"2025-11-12T03:21:07Z","timestamp":1762917667251},"reference-count":24,"publisher":"Royal College of Surgeons of England","issue":"2","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["annals"],"published-print":{"date-parts":[[2016,2]]},"abstract":"<jats:sec><jats:title>Introduction<\/jats:title><jats:p> We assessed changes in metal-on-metal hip arthroplasties (MoMHAs) after repeat ultrasound examination. <\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p> This retrospective, single-centre cohort study involved all patients undergoing two ultrasound examinations of the same MoMHA. Between 2010 and 2014, 96 ultrasound examinations were performed in 48 MoMHAs (mean time between scans = 1.1 years). A radiologist assigned each scan to one of four grades and measured volumes of any solid\/cystic masses. Changes in grade and lesion volume between scans were analysed. <\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p> Change in grade between scans was significant (p=0.012); 27% (n=13) of MoMHAs increased in grade, 67% (n=32) had no grade change, and 6% (n=3) decreased in grade. The mean increase in lesion volume was 24.2cm<jats:sup>3<\/jats:sup> by the second scan, and was significant (p=0.023). Evidence of progression in findings was observed in 54% (26\/48) of MoMHAs. Of patients with normal scans initially, 44% (8\/18) developed abnormalities. No factors (including blood metal ion concentrations and cup position) were associated significantly with progression of ultrasound findings. <\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p> Repeat ultrasound in MoMHA patients demonstrated that findings frequently progress in the short-term. Therefore, regular surveillance of MoMHA patients is important, with ultrasound representing an effective investigation for identifying the development and progression of lesions. <\/jats:p><\/jats:sec>","DOI":"10.1308\/rcsann.2016.0052","type":"journal-article","created":{"date-parts":[[2016,1,7]],"date-time":"2016-01-07T15:41:04Z","timestamp":1452181264000},"page":"143-149","source":"Crossref","is-referenced-by-count":11,"title":["The utility of repeat ultrasound imaging in the follow-up of metal-on-metal hip arthroplasty patients"],"prefix":"10.1308","volume":"98","author":[{"given":"GS","family":"Matharu","sequence":"first","affiliation":[{"name":"The Royal Orthopaedic Hospital, Birmingham, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"S","family":"Janardhan","sequence":"additional","affiliation":[{"name":"The Royal Orthopaedic Hospital, Birmingham, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"L","family":"Brash","sequence":"additional","affiliation":[{"name":"The Royal Orthopaedic Hospital, Birmingham, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"PB","family":"Pynsent","sequence":"additional","affiliation":[{"name":"The Royal Orthopaedic Hospital, Birmingham, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"DJ","family":"Dunlop","sequence":"additional","affiliation":[{"name":"The Royal Orthopaedic Hospital, Birmingham, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"SLJ","family":"James","sequence":"additional","affiliation":[{"name":"The Royal Orthopaedic Hospital, Birmingham, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"171","reference":[{"key":"bib1","doi-asserted-by":"publisher","DOI":"10.1302\/0301-620X.94B11.30680"},{"key":"bib2","doi-asserted-by":"publisher","DOI":"10.1302\/0301-620X.92B1.22770"},{"key":"bib3","doi-asserted-by":"publisher","DOI":"10.1302\/0301-620X.93B8.26040"},{"key":"bib4","doi-asserted-by":"publisher","DOI":"10.1016\/S0140-6736(12)60353-5"},{"key":"bib5","doi-asserted-by":"publisher","DOI":"10.1016\/S0140-6736(12)60989-1"},{"key":"bib6","doi-asserted-by":"publisher","DOI":"10.1302\/0301-620X.91B8.22562"},{"key":"bib7","doi-asserted-by":"publisher","DOI":"10.5301\/hipint.5000140"},{"key":"bib10","author":"US Food and Drug Administration (2013)","journal-title":"Medical devices. 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