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Reverse Total Shoulder Arthroplasty
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Are Readmissions After Total Knee Arthroplasty Preventable?

Charles A Su1, Jonathan A Copp1, Douglas S Weinberg1

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Readmissions after total knee arthroplasty (TKA) are common, but most are medically related and rarely preventable. This study found only 3% of 90-day readmissions were preventable, with none being orthopaedic.

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Area of Science:

  • Orthopaedic Surgery
  • Healthcare Quality Improvement
  • Patient Outcomes

Background:

  • Readmission rates after total joint arthroplasty (TJA) are key quality metrics for reimbursement.
  • The preventability and etiology of these readmissions remain unclear.
  • Understanding readmission drivers is crucial for improving patient care and reducing healthcare costs.

Purpose of the Study:

  • To investigate the causes (orthopaedic vs. medical) of 30- and 90-day readmissions after total knee arthroplasty (TKA).
  • To determine the proportion of TKA readmissions that are potentially preventable.
  • To assess the validity of readmission rates as a measure of hospital care quality.

Main Methods:

  • Retrospective review of 1,625 elective TKAs performed between 2011 and 2014.
  • Categorization of readmissions into orthopaedic and medical etiologies.
  • Assessment of preventability by an expert panel using objective criteria.

Main Results:

  • Overall 90-day readmission rate was 4.8% (79/1,625).
  • Medical etiologies accounted for the majority of readmissions (78% at 90 days, 80% at 30 days).
  • Only 3% (2/79) of 90-day readmissions were deemed potentially preventable, with none being orthopaedic.

Conclusions:

  • Hospital readmissions following TKA are frequent but largely driven by medical, not orthopaedic, issues.
  • A very small percentage of TKA readmissions are preventable, challenging their use as a sole quality indicator.
  • Focusing on managing medical comorbidities may be more effective in reducing TKA readmissions than solely addressing surgical factors.