Current Status of Acupuncture in Relieving Pain after Joint Replacement

Total joint replacement surgeries, especially of the knee and hip, are among today's most effective orthopedic procedures for treating end-stage joint disease. These interventions allow most patients to use their prostheses for more than 20 years, often for the rest of their lives, and are recognized as highly cost-effective treatments. However, despite surgical success, virtually all patients experience some degree of pain in the postoperative period. This pain can be severe and negatively affect physical therapy and patients' psychological well-being, significantly reducing the benefits of surgery.

Traditional pain control methods, such as oral analgesics, patient-controlled analgesia, nerve blocks, and intravenous medications, frequently cause adverse effects such as nausea, vomiting, urinary retention, and spinal nerve syndrome, creating the need for safer and more effective alternatives.

This review study aimed to systematically examine the current application of acupuncture in pain relief after joint replacement surgery, with a specific focus on the knee and hip joints. The researchers analyzed the available scientific literature on different acupuncture modalities used in this context, including traditional acupuncture, electroacupuncture, auricular acupuncture, warm acupuncture, and wrist-ankle acupuncture. The methodology involved a comprehensive analysis of clinical studies and research investigating the efficacy of these techniques at different times during the perioperative period, from before surgery through the postoperative recovery phase.

The results showed that acupuncture offers significant benefits in postoperative pain management through several mechanisms. According to traditional Chinese medicine, joint replacement surgery causes tissue damage and disrupts the normal flow of qi and blood in the meridians, resulting in blockages that manifest as local pain and inflammation. Acupuncture acts by clearing these meridians, harmonizing yin and yang, improving the circulation of qi and blood through organs and tissues, and providing rapid pain relief. From the standpoint of modern medicine, acupuncture directly influences signaling pathways in damaged tissue cells and promotes the release of neurotransmitters that modulate pain perception.

Different techniques showed specific efficacy: electroacupuncture, especially at low frequencies of 2 Hz and current intensity of 10-15 mA, demonstrated a significant reduction in analgesic medication use and its adverse effects. Auricular acupuncture proved effective in reducing the need for fentanyl, while warm acupuncture promoted improvements in inflammatory levels and joint function.

The clinical implications of these findings are substantial for both patients and health professionals. For patients, acupuncture offers a safe and effective alternative that can significantly reduce dependence on analgesic medications, thereby decreasing the risk of side effects such as nausea, vomiting, and gastrointestinal problems. In addition to pain relief, acupuncture has been shown to improve sleep quality, reduce anxiety, and accelerate the rehabilitation process, allowing patients to begin early mobilization with greater comfort and motivation. The treatment has also shown potential in preventing complications such as deep vein thrombosis and postoperative delirium.

For health professionals, integrating acupuncture into multimodal analgesia protocols represents a valuable tool that can significantly improve clinical outcomes. The optimal time to initiate treatment appears to be one week before surgery, continuing into the postoperative period, with benefits observed within the first 24 hours after the intervention.

Despite the promising results, the study identified several important limitations that should be considered. Most research focuses on the postoperative period, with few studies investigating the effects of preventive acupuncture initiated days or weeks before surgery. There is a shortage of high-quality randomized clinical trials with sufficiently large samples to establish definitive standardized protocols. The optimal parameters for electroacupuncture, such as frequency, intensity, and treatment duration, are not yet fully established.

In addition, there is variability in acupuncture point selection across different studies, making it difficult to compare results and standardize protocols. The exact mechanisms by which acupuncture exerts its analgesic effects in the postoperative context require further investigation. The field still lacks research that adequately explores the relationship between the timing of acupuncture application and its analgesic efficacy, as well as studies directly comparing different acupuncture modalities. Therefore, although acupuncture proves to be a promising and safe therapeutic modality for postoperative pain management in joint replacement surgery, further rigorous research is needed to establish standardized protocols and fully understand its mechanisms of action, ensuring its optimized implementation in clinical practice.