Clinical Scorecard: Unicompartmental Knee Replacement Surgery in Individuals Diagnosed with Parkinson’s Disease

At a Glance

Key Highlights

• UKA offers a less invasive alternative to TKA with lower perioperative morbidity and mortality in PD patients.
• Indications for UKA include isolated compartmental OA, correctable intra-articular deformity, intact ACL, and preserved contralateral compartment cartilage.
• Early mobilization and tailored rehabilitation protocols are critical post-UKA, with precautions after lateral UKA to protect the lateral joint capsule.

Guideline-Based Recommendations

Diagnosis

• Confirm Parkinson’s disease diagnosis clinically prior to surgery.
• Use standard radiographic workup including AP/lateral knee, patella skyline, varus/valgus stress views, and hip-to-ankle standing radiographs.
• Apply Oxford criteria for medial UKA indication; use Rosenberg view or MRI to confirm lateral compartment cartilage defects if needed.

Management

• Offer UKA to patients with isolated unicompartmental OA, correctable deformity, functionally intact ACL, and preserved contralateral compartment cartilage.
• Do not consider age, body weight, activity level, or chondrocalcinosis as contraindications for UKA.
• Use minimally invasive medial or lateral parapatellar approach without patella dislocation.
• Implant mobile-bearing or cemented Oxford partial knee prostheses; consider cementless implants with bone-preserving tibial cuts in selected cases.
• Encourage early full weight-bearing mobilization on day of surgery.
• Tailor rehabilitation to avoid forced knee flexion and leg press exercises early after lateral UKA.

Monitoring & Follow-up

• Conduct standardized follow-up including implant survival, reoperation rates, and functional scores such as Oxford Knee Score and UCLA Activity Score.
• Monitor radiographic parameters including hip-knee-ankle angle and medial proximal tibial angle pre- and postoperatively.
• Obtain postoperative radiographs for implant positioning and alignment assessment.

Risks

• Increased perioperative complications and mortality reported with TKA in PD patients; UKA may reduce these risks.
• Potential for periprosthetic tibial fractures and valgus subsidence, mitigated by surgical technique adjustments in cementless UKA.
• Functional outcomes may vary with PD disease severity.

Patient & Prescribing Data

Patients with Parkinson’s disease undergoing unicompartmental knee arthroplasty for isolated compartmental osteoarthritis.

UKA in PD patients shows low perioperative complication rates, acceptable implant survivorship, and favorable functional outcomes with appropriate patient selection and surgical technique.

Clinical Best Practices

• Careful patient selection applying Oxford criteria and confirming isolated unicompartmental disease.
• Use minimally invasive surgical approaches preserving patellar tracking.
• Implement early mobilization with physiotherapy focusing on gradual range of motion and muscle strengthening.
• Avoid early forced knee flexion and leg press exercises after lateral UKA to protect joint capsule integrity.
• Monitor functional outcomes using validated scoring systems and radiographic parameters.

References

• Oxford criteria for UKA indication
• Oxford Knee Score and patient acceptable symptom state
• Parkinson’s disease epidemiology and motor symptoms