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DOES A KNEE MAGNETIC RESONANCE IMAGING SCAN FOR PATIENTS ON WAITING LISTS FOR KNEE ARTHROSCOPY REDUCE THE NUMBER OF ARTHROSCOPIES?



Abstract

Statement of Purpose: We tested the null hypothesis of no significant difference in arthroscopy rates for patients on a waiting list for arthroscopy in patients in which surgeons had a knee magnetic resonance imaging scan report prior to surgery, compared to those who did not have a report.

Methods and Results: This is a single-centre randomised controlled trial. 252 eligible patients consented and randomised. The two groups were similar with respect to a range of baseline factors. Very few arthroscopies were not performed −4.8% in the intervention arm and 5.5% in the control arm (χ2=0.06, df=1, p> 0.05). A longitudinal analysis of the secondary outcomes showed that there were no significant differences between the intervention and the control arms of the study.

Conclusion: Magnetic resonance imaging, prior to knee arthroscopy, does not lead to a reduction in the number of arthroscopies undertaken in the intervention group nor improve patient outcome in a range of secondary measures.

Honorary Secretary – Mr Roger Smith. Correspondence should be addressed to BASK at the Royal College of Surgeons, 35 - 43 Lincoln’s Inn Fields, London WC2A 3PN