Subacute pain after total knee arthroplasty.

Area of Science:

• Orthopedic Surgery
• Pain Management
• Anesthesiology

Background:

• Total knee arthroplasty (TKA) aims to alleviate chronic osteoarthritis pain.
• While immediate post-operative pain is manageable with anesthesia and nerve blocks, many patients experience significant pain weeks later.
• This post-operative pain impedes rehabilitation, affecting joint function, strength, balance, and fall prevention.

Observation:

• Acute pain post-TKA is often controlled by multimodal approaches including spinal anesthesia, local infiltration analgesia, and peripheral nerve blocks.
• A substantial proportion of patients (around 50%) report clinically significant pain persisting into the weeks following TKA.
• Pain during movement significantly hinders active rehabilitation efforts.

Findings:

• Intensive analgesic and antihyperalgesic therapies during the initial weeks post-TKA may mitigate the risk of developing chronic pain.
• Spinal cord stimulation is identified as a potential treatment for TKA patients experiencing predominantly neuropathic pain.

Implications:

• Optimizing early pain control is essential for successful TKA recovery and function.
• Proactive management of post-TKA pain is critical to prevent the transition to chronic pain syndromes.
• Further research into targeted therapies like spinal cord stimulation for specific pain types post-TKA is warranted.