Preoperative Activity Level an Indicator of Postoperative Functional Outcomes with a Contemporary Revision Total Knee...

Area of Science:

• Orthopedic Surgery
• Biomedical Engineering
• Rehabilitation Medicine

Background:

• The growing population requiring revision total knee arthroplasty (rTKA) necessitates understanding how preoperative conditions influence outcomes.
• Preoperative activity levels are crucial for managing patient expectations following rTKA.

Purpose of the Study:

• To analyze and compare the postoperative outcomes of low-activity (LA) versus high-activity (HA) patient subgroups undergoing contemporary rTKA.
• To evaluate the impact of preoperative activity levels on functional recovery and quality of life after rTKA.

Main Methods:

• A prospective multicenter study evaluated 181 rTKA patients with a minimum 2-year follow-up.
• Patients were categorized into LA (Lower Extremity Activity Scale score 1-7) and HA (score 8-18) groups.
• Clinical outcomes (Knee Society Score) and quality of life (SF-6D) were assessed.

Main Results:

• No significant differences in age or BMI between LA and HA groups.
• Both groups showed similar Knee Society Score (KSS) improvements, but the LA group had greater functional gains at 6 months and 2 years.
• The LA group demonstrated a statistically significant improvement in SF-6D scores at 1 year.

Conclusions:

• Revision total knee arthroplasty significantly improves functional outcomes for patients, irrespective of their preoperative activity level.
• Patients with lower preoperative activity levels exhibit greater cumulative improvements in function and quality of life post-rTKA.
• Low preoperative function should not be a contraindication for rTKA, as the procedure can substantially enhance overall activity and function.