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Are Metal Ion Levels a Useful Trigger for Surgical Intervention?
- Source :
- Journal of Arthroplasty; Sep2012 Supplement 1, Vol. 27, p32-36, 5p
- Publication Year :
- 2012
-
Abstract
- Abstract: The purpose of this study was to determine if cobalt and chromium ion levels can predict soft tissue damage at total hip revision. This study included 90 metal-on-metal total hip patients with preoperative cobalt and chromium ion levels. Tissue damage noted at revision surgery was graded on a 4-point scale. Sensitivity, specificity, and predictive values were calculated for various threshold values. Receiver operating characteristic analysis was conducted. Using 7 ppb as a threshold, cobalt and chromium ion levels had poor sensitivity and specificity (Co, 65% and 56%; Cr, 29% and 75%). Positive predictive values for cobalt and chromium were only 48% and 26% respectively. The area under the curve was 0.37 for cobalt and 0.44 for chromium. The length of time to revision significantly correlated with tissue damage (P = .001). Ion levels are unreliable predictors of periarticular soft tissue damage and should not be used in isolation as surgical intervention triggers. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 08835403
- Volume :
- 27
- Database :
- Supplemental Index
- Journal :
- Journal of Arthroplasty
- Publication Type :
- Academic Journal
- Accession number :
- 79549026
- Full Text :
- https://doi.org/10.1016/j.arth.2012.03.020