title: Detection of incorrect manufacturer labelling of hip components.
abstract: We describe the case of a 53-year-old man who underwent a left metal-on-metal hip resurfacing in 2015. Component size mismatch (CSM) was suspected because of the patient's immediate post-operative mechanical symptoms and high metal ion levels. Surgical notes indicated the appropriate combinations of implants were used. However, we detected a mismatch using computed tomography. Revision was performed and subsequent measurements of explanted components confirmed the mismatch. To our knowledge, this case is the first report of a CT method being used in a patient to pre-operatively identify CSM.
authors.affiliation: Institute of Orthopaedics, University College London, London, UK. zchahm8@ucl.ac.uk.
authors.forename: Matthieu
authors.initials: M
authors.lastname: Durand-Hill
authors.affiliation: Institute of Orthopaedics, University College London, London, UK.
authors.forename: Johann
authors.initials: J
authors.lastname: Henckel
authors.affiliation: Royal United Hospital, Bath, UK.
authors.forename: Matthew
authors.initials: M
authors.lastname: Burwell
authors.affiliation: Institute of Orthopaedics, University College London, London, UK.
authors.forename: John
authors.initials: J
authors.lastname: Skinner
authors.affiliation: Institute of Orthopaedics, University College London, London, UK.
authors.forename: Alister
authors.initials: A
authors.lastname: Hart
mesh_terms: D019644:Arthroplasty, Replacement, Hip; D006622:Hip Prosthesis / Q000009:adverse effects*; D006801:Humans; D008297:Male; D019300:Medical Errors; D008875:Middle Aged; D011356:Product Labeling; D012086:Reoperation; D014057:Tomography, X-Ray Computed
keywords: Arthroplasty; Computed tomography; Hip; Hip prosthesis; Postoperative care; Prostheses and implants; Replacement; X-ray