Metal ion levels in a triathlete with a metal-on-metal resurfacing arthroplasty
of the hipR. De Haan, MD, Orthopaedic Resident1; P.
Campbell, PhD, Research Scientist, Associate Professor2; S. Reid, MD,
PhD, Sports Medicine Physician3; A. K. Skipor, MS, Research Scientist4;
and K. De Smet, MD, Orthopaedic Surgeon11 ANCA Medical Center, Krijgslaan 181, 9000 Gent,
2 J Vernon Luck Snr MD, Orthopaedic Research Center, Orthopaedic Hospital, 2400
S., Flower Street, UCLA, Los Angeles 90007, California, USA.
3 St. Helen’s Private Hospital, 186, Macquarie Street, Hobart, Tasmania 7000,
4 Department of Orthopaedic Surgery, Rush Presbyterian St Luke’s, Medical
Center, Room 756, Cohn Research Building, 1735 West Harrison Street, Chicago,
Illinois 60612-3833, USA. A prospective study of serum and urinary ion levels was undertaken
in a triathlete who had undergone a metal-on-metal resurfacing
arthroplasty of the hip four years previously. The one month study
period included the final two weeks of training, the day of the
triathlon, and the two weeks immediately post-race. Serum cobalt and
chromium levels did not vary significantly throughout this period,
including levels recorded on the day after the 11-hour triathlon.
Urinary excretion of chromium increased immediately after the race
and had returned to pre-race levels six days later. The clinical
implications are discussed.