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

Table 1

Patients and procedures demographics excluding six patients with metal ions below detection limit (THR: Total Hip Replacement).

Demographics
Age (range)	65.7 years (31–88 years)
Sex (M : F)	47 : 73
Mean implantation time (range)	59.3 months (10–173 months)
Procedure	THR: 113, resurfacing: 7
Laterality	Unilateral: 102, bilateral: 18