The Interchangeability of Plasma and Whole Blood Metal Ion Measurement in the Monitoring of Metal on Metal Hips

Figure 2

The scatterplot diagrams showing Bland and Altman limits of agreement between measurements in plasma and whole blood for Co (a) and Cr (b). Amongst these, seven cobalt data points and four chromium data points lie outside the range displayed but are included in the calculation.

(a)

(b)