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. 2017 Oct 12;12(10):e0186323. doi: 10.1371/journal.pone.0186323

Table 3. Chromium and nickel concentration in blood and urine preoperatively and at the time of bar removal.

Mean level prior to MIRPE (μg/l) Mean level at bar removal (μg/l) P value Highest level at bar removal (μg/l) Reference value (μg/l)
Chromium in plasma 0.24 0.37 0.142 1.2 0.4
Chromium in urine 0.29 3.19 <0.001 18.6 0.6
Nickel in blood 0.28 1.45 <0.001 10.65 0.5
Nickel in urine 1.82 2.77 0.379 8.9 3