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Obesity has no effect on outcomes following unicompartmental knee arthroplasty.

Publication ,  Journal Article
Plate, JF; Augart, MA; Seyler, TM; Bracey, DN; Hoggard, A; Akbar, M; Jinnah, RH; Poehling, GG
Published in: Knee Surg Sports Traumatol Arthrosc
March 2017

PURPOSE: Although obesity has historically been described as a contraindication to UKA, improved outcomes with modern UKA implant designs have challenged this perception. The purpose of this study was to assess the influence of obesity on the outcomes of UKA with a robotic-assisted system at a minimum follow-up of 24 months with the hypothesis that obesity has no effect on robotic-assisted UKA outcomes. METHODS: There were 746 medial robotic-assisted UKAs (672 patients) with a mean age of 64 years (SD 11) and a mean follow-up time of 34.6 months (SD 7.8). Mean overall body mass index (BMI) was 32.1 kg/m2 (SD 6.5), and patients were stratified into seven weight categories according to the World Health Organization classification. RESULTS: Patient BMI did not influence the rate of revision surgery to TKA (5.8 %) or conversion from InLay to OnLay design (1.7 %, n.s.). Mean postoperative Oxford knee score was 37 (SD 11) without correlation with BMI (n.s.). The type of prosthesis (InLay/OnLay) regardless of BMI had no influence on revision rate (n.s.). BMI did not influence 90-day readmissions (4.4 %, n.s.), but showed significant correlation with higher opioid medication requirements and a higher number of physical therapy session needed to reach discharge goals (p = 0.031). CONCLUSION: These findings suggest that BMI does not influence clinical outcomes and readmission rates of robotic-assisted UKA at mid-term. The classic contraindication of BMI >30 kg/m2 may not be justified with the use of modern UKA designs or techniques. LEVEL OF EVIDENCE: IV.

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Published In

Knee Surg Sports Traumatol Arthrosc

DOI

EISSN

1433-7347

Publication Date

March 2017

Volume

25

Issue

3

Start / End Page

645 / 651

Location

Germany

Related Subject Headings

  • Treatment Outcome
  • Robotic Surgical Procedures
  • Reoperation
  • Postoperative Period
  • Osteoarthritis, Knee
  • Orthopedics
  • Obesity
  • Middle Aged
  • Male
  • Humans
 

Citation

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ICMJE
MLA
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Plate, J. F., Augart, M. A., Seyler, T. M., Bracey, D. N., Hoggard, A., Akbar, M., … Poehling, G. G. (2017). Obesity has no effect on outcomes following unicompartmental knee arthroplasty. Knee Surg Sports Traumatol Arthrosc, 25(3), 645–651. https://doi.org/10.1007/s00167-015-3597-5
Plate, Johannes F., Marco A. Augart, Thorsten M. Seyler, Daniel N. Bracey, Aneitra Hoggard, Michael Akbar, Riyaz H. Jinnah, and Gary G. Poehling. “Obesity has no effect on outcomes following unicompartmental knee arthroplasty.Knee Surg Sports Traumatol Arthrosc 25, no. 3 (March 2017): 645–51. https://doi.org/10.1007/s00167-015-3597-5.
Plate JF, Augart MA, Seyler TM, Bracey DN, Hoggard A, Akbar M, et al. Obesity has no effect on outcomes following unicompartmental knee arthroplasty. Knee Surg Sports Traumatol Arthrosc. 2017 Mar;25(3):645–51.
Plate, Johannes F., et al. “Obesity has no effect on outcomes following unicompartmental knee arthroplasty.Knee Surg Sports Traumatol Arthrosc, vol. 25, no. 3, Mar. 2017, pp. 645–51. Pubmed, doi:10.1007/s00167-015-3597-5.
Plate JF, Augart MA, Seyler TM, Bracey DN, Hoggard A, Akbar M, Jinnah RH, Poehling GG. Obesity has no effect on outcomes following unicompartmental knee arthroplasty. Knee Surg Sports Traumatol Arthrosc. 2017 Mar;25(3):645–651.
Journal cover image

Published In

Knee Surg Sports Traumatol Arthrosc

DOI

EISSN

1433-7347

Publication Date

March 2017

Volume

25

Issue

3

Start / End Page

645 / 651

Location

Germany

Related Subject Headings

  • Treatment Outcome
  • Robotic Surgical Procedures
  • Reoperation
  • Postoperative Period
  • Osteoarthritis, Knee
  • Orthopedics
  • Obesity
  • Middle Aged
  • Male
  • Humans