How should we follow-up asymptomatic metal-on-metal hip resurfacing patients? A prospective longitudinal cohort study

Adrian K. Low, Gulraj S. Matharu*, Simon J. Ostlere, David W. Murray, Hemant G. Pandit

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)
4 Downloads (Pure)

Abstract

Current surveillance for metal-on-metal hip resurfacing (MoMHR) patients is not evidence based. This study established changes that occurred in 152 asymptomatic MoMHRs using repeat ultrasound and patient-reported outcomes. Factors associated with (1) ultrasound progression and (2) developing new pseudotumors were analyzed. Patients underwent repeat assessments 4.3 years later. Ultrasound progression was observed in 19% (n = 29), with 10% (n = 15) developing new pseudotumors. Key predictors of ultrasound progression included high blood cobalt (P = .00013) and chromium (P = .00065), and high initial ultrasound grade (P = .003) and volume (P = .036). No asymptomatic MoMHRs with initially normal metal ions (< 2 μg/L) and normal ultrasounds (33% of cohort) developed new pseudotumors. This patient subgroup does not require repeat follow-up within 5 years.

Original languageEnglish
Pages (from-to)146-151
Number of pages6
JournalJournal of Arthroplasty
Volume31
Issue number1
DOIs
Publication statusPublished - Jan 2016
Externally publishedYes

Bibliographical note

Copyright the Author(s) 2016. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

Keywords

  • Asymptomatic
  • Blood metal ions
  • Follow-up
  • Hip resurfacing
  • Metal-on-metal
  • Ultrasound

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