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SINGLE INCISION POSTERIOR APPROACH MINIMALLY INVASIVE TOTAL HIP ARTHROPLASTY IS A SAFE, EFFECTIVE AND REPRODUCIBLE TECHNIQUE IN A DISTRICT GENERAL HOSPITAL. A RANDOMISED CONTROL TRIAL.



Abstract

Method: This study reports upon 216 patients (97 Minimally invasive and 119 Standard) enrolled into a randomised control trial comparing a standard posterior approach to the hip with a single incision minimally invasive surgery (MIS) posterior approach at 6 weeks and 1 year post-operatively. Primary outcome measures included operative time, blood loss, length of stay and functional hip scores.

Results: The demographics and pre-operative hip scores for both cohorts were statistically similar. Intra-operative blood loss was significantly reduced in the MIS cohort (p=< 0.01). There was no difference in surgical time (p=0.37), time to discharge (p=0.24) or complication rate between the two groups.

Both groups had statistically improved post-operative hip scores, however, at the 1 year follow-up the MIS group were significantly better in terms of WOMAC, Harris Hip, Merle d’Aubigne and SF-12 scores when compared with a standard posterior approach.

Conclusion: This study demonstrates that MIS THA is a safe, reproducible technique in a DGH. We recommend the use of MIS techniques in primary THA and adhere to the principle that an incision need be no longer than necessary to perform the procedure safely.

Correspondence should be addressed to Mr Peter Howard, Editorial Secretary, BHS, c/o BOA, The Royal College of Surgeons, 35–43 Lincoln’s Inn Fields, London WC2A 3PE, England.