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Revision of total knee replacement (TKR) secondary to raised cobalt levels: should this be considered in the painful TKR patient? | LitMetric

A 63-year-old woman was referred to the specialised knee revision clinic with ongoing knee pain after total knee replacement. She incidentally had cobalt and chromium levels measured. These were seen to be elevated. Comprehensive assessment and investigation did not identify any other source of cobalt or chromium. Aseptic loosening of the knee was diagnosed, and the knee was revised. At the time of surgery, the tissue was seen to be darkened consistent with metallosis. Multiple samples excluded infection on extended cultures. Aspirated fluid showed that periprosthetic fluid had elevated cobalt levels. The knee was successfully revised with good symptomatic outcome and significantly, over the course of several months post-revision, the cobalt and chromium levels returned to normal.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8286745PMC
http://dx.doi.org/10.1136/bcr-2020-240674DOI Listing

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