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Related Experiment Videos

Do patients lose weight after total knee replacement?

Carlos Roberto Schwartsmann1,2, Alexandre Moreira Borges2, Geraldo Luiz Schuck de Freitas2

  • 1Universidade Federal de Ciências da Saúde de Porto Alegre (UFCSPA), Porto Alegre, RS, Brazil.

Revista Brasileira De Ortopedia
|April 15, 2017
PubMed
Summary

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Total knee arthroplasty (TKA) patients did not show significant weight changes after surgery. This study investigated the impact of TKA on body mass index (BMI) in patients, finding no substantial reduction post-operation.

Area of Science:

  • Orthopedic surgery
  • Biomedical engineering
  • Clinical outcomes

Background:

  • Patients undergoing total knee arthroplasty (TKA) often experience weight maintenance or gain post-procedure.
  • Increased body mass index (BMI) post-TKA can lead to accelerated prosthesis wear and revision surgeries.
  • Understanding the impact of TKA on patient BMI is crucial for long-term implant survival.

Purpose of the Study:

  • To evaluate the effect of total knee arthroplasty (TKA) on the body mass index (BMI) of patients.
  • To determine if TKA surgery leads to a significant reduction in patient BMI.
  • To assess the relationship between TKA and weight management in orthopedic patients.

Main Methods:

  • Retrospective analysis of 91 patients undergoing TKA between August 2011 and July 2013.
Keywords:
Body mass indexKnee arthroplastyObesity

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  • Patients stratified into normal weight (BMI 20-25), overweight (BMI 25-30), and obese (BMI >30) categories.
  • Re-evaluation of BMI at a minimum of 18 months post-surgery.

    • Main Results:

    • Mean preoperative BMI was 27.24 kg/m², with most patients classified as overweight (65) or obese (9).
    • Postoperative analysis revealed weight loss in 46% and weight gain in 54% of patients.
    • The mean postoperative BMI slightly decreased by 0.08 kg/m² to 27.16 kg/m².

    Conclusions:

    • Total knee arthroplasty (TKA) surgery does not result in a significant reduction in patient body mass index (BMI).
    • Weight management remains a critical consideration for patients following TKA to optimize long-term outcomes.
    • Further research is needed to explore interventions for weight control in TKA recipients.