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Purpose <p>To compare 90-day readmissions, complications, and resource use after robotic-assisted versus conventional total knee arthroplasty (TKA) in a contemporary, nationally representative cohort.</p> Methods <p>Retrospective cohort study using the Nationwide Readmissions Database (NRD) 2020–2022. Primary TKA identified from the PR1 field (ICD-10-PCS). Exclusions included non-elective admissions, revisions, bilateral procedures, age &lt; 18, oncology/fracture/reoperation, COVID-19, and discharges after September. Readmissions within 90&#xa0;days were categorized (prosthesis/SSI, mechanical/implant, VTE). 1:1 propensity score matching (nearest neighbor, caliper 0.01, no replacement) included demographics, comorbidities, hospital factors, and year.</p> Results <p>After matching, 96,982 patients (48,491 per group) were analyzed. Robotic TKA showed lower all-cause 90-day readmission (5.0% vs 6.5%), superior readmission-free survival (log-rank <i>P</i> &lt; 0.001), shorter readmission LOS (4.8 vs 5.6&#xa0;days), and lower readmission charges ($66,769 vs $75,544), with slightly higher index charges ($78,125 vs $74,090). Risks were lower for VTE/PE, pneumonia, transfusion, postoperative pain, and prosthesis/SSI-related and mechanical readmissions.</p> Conclusions <p>In the largest contemporary national analysis, robotic TKA was associated with fewer early complications, lower 90-day readmissions, and reduced readmission resource use compared with conventional TKA.</p>

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National evidence linking robotic total knee arthroplasty to reduced 90-day readmissions, complications, and readmission costs

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年2月28日

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  • David Maman,
  • Yaniv Steinfeld,
  • Yaron Berkovich

摘要

Purpose

To compare 90-day readmissions, complications, and resource use after robotic-assisted versus conventional total knee arthroplasty (TKA) in a contemporary, nationally representative cohort.

Methods

Retrospective cohort study using the Nationwide Readmissions Database (NRD) 2020–2022. Primary TKA identified from the PR1 field (ICD-10-PCS). Exclusions included non-elective admissions, revisions, bilateral procedures, age < 18, oncology/fracture/reoperation, COVID-19, and discharges after September. Readmissions within 90 days were categorized (prosthesis/SSI, mechanical/implant, VTE). 1:1 propensity score matching (nearest neighbor, caliper 0.01, no replacement) included demographics, comorbidities, hospital factors, and year.

Results

After matching, 96,982 patients (48,491 per group) were analyzed. Robotic TKA showed lower all-cause 90-day readmission (5.0% vs 6.5%), superior readmission-free survival (log-rank P < 0.001), shorter readmission LOS (4.8 vs 5.6 days), and lower readmission charges ($66,769 vs $75,544), with slightly higher index charges ($78,125 vs $74,090). Risks were lower for VTE/PE, pneumonia, transfusion, postoperative pain, and prosthesis/SSI-related and mechanical readmissions.

Conclusions

In the largest contemporary national analysis, robotic TKA was associated with fewer early complications, lower 90-day readmissions, and reduced readmission resource use compared with conventional TKA.