Hip & pelvis

The Korean Hip Society (대한고관절학회)
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Transitioning from the Posterior Approach to the Direct Anterior Approach for Total Hip Arthroplasty

  • Cameron M. Metzger (Department of Orthopaedic Surgery, Indiana University School of Medicine) ;
  • Hassan Farooq (Department of Orthopaedic Surgery and Rehabilitation, Loyola University Health System) ;
  • Jacqueline O. Hur (Methodist Sports Medicine Research & Education Foundation) ;
  • John Hur (Methodist Sports Medicine Research & Education Foundation)
  • Received : 2022.04.26
  • Accepted : 2022.08.02
  • Published : 2022.12.31
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Abstract

Purpose: Total hip arthroplasty (THA) using the direct anterior approach (DAA) is known to have a learning curve. The purpose of this study was to review cases where surgery was performed by an arthroplasty surgeon transitioning from the posterior approach (PA) to the DAA. We hypothesized similar complication rates and improvements in surgical duration over time. Materials and Methods: A review of 2,452 consecutive primary THAs was conducted. Surgical duration, length of stay (LOS), surgical complications, decrease in postoperative day (POD) 1 hemoglobin, transfusion rates, POD 0 and POD 1 pain scores, incision length, leg length discrepancy (LLD), and radiographic cup position were recorded. Results: No differences in surgical duration were observed after the first 50 DAA cases. A shorter LOS was observed for the DAA, and statistical difference was appreciated after the first 100 DAA cases. There were no differences in periprosthetic fractures. A higher rate of infections and hip dislocations were observed with the PA. The PA showed an association with higher transfusion rates without significant difference in POD 1 decrease in hemoglobin over the first 100 DAA cases. Similar POD 0 and POD 1 pain scores with a smaller incision were observed for the first 100 DAA cases. The DAA cohort showed less variation in cup inclination, version, and LLD. Conclusion: DAA is safe and non-inferior in terms of reduced LOS, smaller incision, and less variation in cup position. Fifty DAA cases was noted to be the learning curve required before no differences in duration between approaches were observed.

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References

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