Good sensitivity and specificity of ultrasound for detecting pseudotumors in 83 failed metal-on-metal hip replacements

Autor:	Jorma Pajamäki, Petra Elo, Timo Puolakka, Olli Lainiala, Aleksi Reito, Antti Eskelinen
Rok vydání:	2015
Předmět:	Adult Male Reoperation medicine.medical_specialty Arthroplasty Replacement Hip medicine.medical_treatment Sensitivity and Specificity Granuloma Plasma Cell Treatment failure Hip replacement (animal) Cohort Studies Predictive Value of Tests medicine Humans Orthopedics and Sports Medicine Treatment Failure Aged Retrospective Studies Ultrasonography Aged 80 and over Hip medicine.diagnostic_test business.industry Ultrasound Magnetic resonance imaging Retrospective cohort study General Medicine Middle Aged Magnetic Resonance Imaging Arthroplasty United Kingdom stomatognathic diseases Metals Predictive value of tests Female Hip Joint Surgery Radiology business
Zdroj:	Acta Orthopaedica
ISSN:	1745-3682 1745-3674
DOI:	10.3109/17453674.2014.1001970
Popis:	Background and purpose Ultrasound is used for imaging of pseudotumors associated with metal-on-metal (MoM) hips. Ultrasound has been compared with magnetic resonance imaging, but to date there have been no studies comparing ultrasound findings and revision findings. Methods We evaluated the sensitivity and specificity of preoperative ultrasound for detecting pseudotumors in 82 patients with MoM hip replacement (82 hips). Ultrasound examinations were performed by 1 of 3 musculoskeletal radiologists, and pseudotumors seen by ultrasound were retrospectively classified as fluid-filled, mixed-type, or solid. Findings at revision surgery were retrieved from surgical notes and graded according to the same system as used for ultrasound findings. Results Ultrasound had a sensitivity of 83% (95% CI: 63–93) and a specificity of 92% (CI: 82–96) for detecting trochanteric region pseudotumors, and a sensitivity of 79% (CI: 62–89) and a specificity of 94% (CI: 83–98) for detecting iliopsoas-region pseudotumors. Type misclassification of pseudotumors found at revision occurred in 8 of 23 hips in the trochanteric region and in 19 of 33 hips in the iliopsoas region. Interpretation Despite the discrepancy in type classification between ultrasound and revision findings, the presence of pseudotumors was predicted well with ultrasound in our cohort of failed MoM hip replacements.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2efd17c5f5914340d2665a6ee7ac986f https://doi.org/10.3109/17453674.2014.1001970 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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