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Related Experiment Videos

Walking efficiency after cemented and noncemented total hip arthroplasty.

E Mattsson1, L A Broström, D Linnarsson

  • 1Department of Orthopaedics, Karolinska Institute, Stockholm, Sweden.

Clinical Orthopaedics and Related Research
|May 1, 1990
PubMed
Summary

Total hip arthroplasty (THA) significantly improves walking capacity and Harris hip scores. Cemented Charnley prostheses showed better outcomes than noncemented HP-Garches prostheses, with oxygen cost providing objective walking efficiency data.

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Area of Science:

  • Orthopedic Surgery
  • Biomechanical Engineering
  • Rehabilitation Medicine

Background:

  • Total hip arthroplasty (THA) is a common procedure to alleviate hip pain and improve function.
  • Assessing functional recovery post-THA traditionally relies on clinical scores, but objective measures of walking efficiency are also crucial.

Purpose of the Study:

  • To evaluate the effectiveness of total hip arthroplasty (THA) using both clinical scores (Harris hip score) and objective walking capacity measures.
  • To compare the outcomes of cemented (Charnley) versus noncemented (HP-Garches) hip prostheses.
  • To investigate the relationship between clinical scores and objective measures of walking efficiency, such as oxygen cost.

Main Methods:

  • A prospective study of 20 patients undergoing THA.

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  • Patients were divided into two groups: 10 receiving a cemented Charnley prosthesis and 10 receiving a noncemented HP-Garches prosthesis.
  • Clinical evaluation using the Harris hip score and walking capacity tests (walking speed, oxygen cost) were performed preoperatively and at 3, 6, and 12 months postoperatively.

    • Main Results:

    • Harris hip scores improved significantly from a mean of 35 preoperatively to 85 at one year post-THA.
    • Patients with Charnley prostheses achieved significantly higher Harris hip scores compared to those with HP-Garches prostheses.
    • Walking speed increased from 62 m/min preoperatively to 80 m/min at one year post-THA.
    • Oxygen cost decreased from 0.267 ml/kg/m preoperatively to 0.221 ml/kg/m at one year post-THA.
    • Oxygen cost changes reflected complications and disease laterality, offering insights not captured by clinical scores alone.

    Conclusions:

    • Both cemented and noncemented THA improve functional outcomes, with cemented Charnley prostheses demonstrating superior clinical results.
    • Objective measures like oxygen cost provide valuable, complementary information on walking efficiency post-THA.
    • Oxygen cost analysis is sensitive to complications and patient-specific factors, enhancing the comprehensive assessment of THA outcomes.