Clinical Scorecard: Outcomes of Total Knee Arthroplasty: Assessing Pain, Function, and Patient Satisfaction in Patients With and Without Prior Bariatric Surgery

At a Glance

Key Highlights

• Patients with prior bariatric surgery had significant weight loss before TKA but reported worse KOOS scores one year postoperatively compared to those without prior BS.
• Prior BS patients had an increased risk of revision due to infection after TKA compared to BMI-matched controls without BS.
• No previous studies have examined patient-reported outcomes (PROs) post-TKA in patients with prior BS; this study fills that gap using validated PROMs like KOOS and OMERACT-OARSI criteria.

Guideline-Based Recommendations

Diagnosis

• Use patient-reported outcome measures such as KOOS and WOMAC to assess pain, function, and quality of life pre- and post-TKA.
• Consider patient history of bariatric surgery when evaluating risk factors for TKA outcomes.

Management

• Monitor patients with prior bariatric surgery closely for postoperative complications, especially infection risk.
• Adjust perioperative care plans considering the altered physiology and weight loss status of patients with prior BS.

Monitoring & Follow-up

• Assess pain and activity in daily living function using KOOS at baseline and one year postoperatively.
• Evaluate patient satisfaction using a Visual Analogue Scale at one year post-TKA.
• Classify response to surgery using OMERACT-OARSI criteria to identify high, low, or non-responders.

Risks

• Increased risk of revision surgery due to infection in patients with prior bariatric surgery undergoing TKA.
• Potential for worse patient-reported outcomes in pain and function despite weight loss from bariatric surgery.

Patient & Prescribing Data

Patients undergoing primary TKA for osteoarthritis with and without prior bariatric surgery, matched by BMI and age.

Prior bariatric surgery patients showed significant weight loss but reported worse knee-related pain and function one year after TKA compared to controls without BS.

Clinical Best Practices

• Incorporate comprehensive preoperative assessment including bariatric surgery history and baseline PROs.
• Use validated PROMs such as KOOS and OMERACT-OARSI criteria for standardized outcome measurement.
• Provide tailored postoperative monitoring for infection and functional recovery in patients with prior BS.
• Consider multidisciplinary collaboration between orthopedic surgeons and bariatric specialists for optimizing patient outcomes.

References

• European obesity trends and impact on TKA outcomes
• Scandinavian Obesity Surgery Register (SOReg)
• Swedish Knee Arthroplasty Register (SKAR)
• Knee injury and Osteoarthritis Outcome Score (KOOS)
• OMERACT-OARSI criteria for osteoarthritis response
• Declaration of Helsinki