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Simultaneous bilateral versus unilateral total knee arthroplasty. Outcomes analysis
1Rothman Institute, Philadelphia, PA, USA.
Clinical Orthopaedics and Related Research
|January 7, 1998
Summary
Simultaneous bilateral total knee arthroplasty increases risks of confusion, cardiopulmonary issues, and blood transfusions compared to unilateral procedures. Higher rehabilitation needs and costs offset potential savings, warranting further safety and efficacy evaluation.
Area of Science:
- Orthopedic Surgery
- Surgical Outcomes Research
Background:
- Total knee arthroplasty (TKA) is a common procedure for knee joint arthritis.
- Simultaneous bilateral TKA offers potential efficiency but may carry increased risks.
- Unilateral TKA serves as a standard comparison for bilateral procedures.
Purpose of the Study:
- To prospectively compare simultaneous bilateral total knee arthroplasty (TKA) with unilateral TKA.
- To evaluate differences in relative risk, complications, cost, and rehabilitation needs.
- To determine the overall safety, efficacy, and cost-effectiveness of simultaneous bilateral TKA.
Main Methods:
- Prospective comparison of 100 simultaneous bilateral TKAs versus 100 unilateral TKAs.
- Application of identical preoperative, intraoperative, and postoperative protocols for all patients.
- Data collection on postoperative confusion, cardiopulmonary complications, blood transfusion requirements, hospitalization duration, rehabilitation needs, and total costs.
Main Results:
- Simultaneous bilateral TKA showed significantly higher rates of postoperative confusion (29% vs. 7%), cardiopulmonary complications (14% vs. 5%), and blood transfusions (17% vs. 1%).
- Hospitalization length was similar, but 89% of bilateral TKA patients required rehabilitation versus 45% of unilateral TKA patients.
- Average hospital charges were higher for simultaneous bilateral TKA ($53,168 vs. $32,598), with similar rehabilitation costs.
Conclusions:
- Simultaneous bilateral TKA is associated with increased risks, including higher incidences of postoperative confusion, cardiopulmonary complications, and blood transfusions.
- While hospitalization duration is similar, the need for rehabilitation is substantially greater after simultaneous bilateral TKA.
- The potential cost savings of simultaneous bilateral TKA are partially negated by increased rehabilitation requirements and overall higher hospital charges, necessitating critical evaluation of its safety, efficacy, and true cost.