Total knee arthroplasty in morbidly obese patients treated with bariatric surgery: a comparative study

J Arthroplasty. 2012 Oct;27(9):1696-700. doi: 10.1016/j.arth.2012.03.005. Epub 2012 May 2.


Our objective was to compare outcomes (anesthesia time, total operative time, tourniquet time, duration of hospital stay, 90-day complication rate, and transfusion rates) of patients with total knee arthroplasty (TKA) who underwent bariatric surgery before or after TKA. One hundred twenty-five patients were included: TKA before bariatric surgery (group 1; n = 39), TKA within 2 years of bariatric surgery (group 2; n = 25), and TKA more than 2 years after bariatric surgery (group 3; n = 61). Patients with TKA more than 2 years after bariatric surgery had shorter anesthesia and total operative and tourniquet times than other groups; differences were significant between groups. Ninety-day complication and transfusion rates approached but did not meet statistical significance. Ninety-day complication rates and duration of hospital stay did not differ significantly between the 3 groups. The level of evidence was level II (cohort study).

MeSH terms

  • Adult
  • Aged
  • Analysis of Variance
  • Arthroplasty, Replacement, Knee*
  • Bariatric Surgery*
  • Blood Transfusion / statistics & numerical data
  • Female
  • Humans
  • Length of Stay / statistics & numerical data
  • Male
  • Middle Aged
  • Obesity, Morbid / complications*
  • Obesity, Morbid / surgery*
  • Operative Time
  • Postoperative Complications / epidemiology
  • Registries
  • Retrospective Studies
  • Tourniquets
  • Treatment Outcome