PROSPECT Updates Hallux Valgus Surgery Guidelines: Minimally Invasive Techniques Now Recommended for Pain Management

What's New in PROSPECT Recommendations for Hallux Valgus Surgery?

The latest PROSPECT recommendations for hallux valgus repair surgery have been updated to include minimally invasive surgical approaches as a key pain management strategy, according to a comprehensive systematic review published in the European Journal of Anaesthesiology. The review analyzed 17 randomized controlled trials and seven systematic reviews/meta-analyses published since 2019, providing robust evidence for optimizing pain control following this common orthopedic procedure that typically results in moderate to severe postoperative pain.

The updated guidelines maintain several recommendations from the 2020 version while introducing important refinements based on contemporary evidence. The analgesic regimen should still include paracetamol combined with an NSAID or COX-2 selective inhibitor administered perioperatively and continued postoperatively, supplemented with systemic dexamethasone intraoperatively, and postoperative opioids for rescue analgesia. For regional anesthesia, ankle block remains the first-choice modality, with local anesthetic wound infiltration as an acceptable alternative. The most significant change in these updated recommendations is the explicit endorsement of minimally invasive surgery or percutaneous osteotomy techniques over traditional open approaches for improved pain outcomes.

Could Minimally Invasive and Regional Techniques Transform Pain Management?

The evidence supporting minimally invasive approaches is particularly compelling. A meta-analysis of 22 studies with 1,415 patients demonstrated decreased pain scores at two weeks with minimally invasive surgery compared to open techniques. This finding was further substantiated by three recent RCTs showing pain score reductions of 1.1 to 2.0 at various time points. These reductions exceed the minimal clinically important difference threshold of 1 point on the numerical rating scale or 10mm on the visual analog scale, suggesting meaningful improvement in patient comfort and potentially enhanced recovery. The accumulation of this evidence prompted the PROSPECT Working Group to transition from their previous stance of leaving surgical technique selection to surgeon discretion to now specifically recommending minimally invasive approaches.

For regional anesthesia, the review confirmed the efficacy of ankle block, with studies showing pain score reductions of approximately 2.9 at 12 hours compared to controls. While popliteal sciatic nerve block provides comparable analgesia to ankle block, it is not recommended as it impairs functional mobility by preventing patients from walking without crutches. Interestingly, the review addressed emerging adjuncts to regional techniques, including perineural magnesium sulfate and liposomal bupivacaine. Despite some promising results, particularly with liposomal bupivacaine showing potential for extended analgesia up to 96 hours, the working group did not recommend these approaches due to limited evidence from single trials and concerns about biological plausibility and safety profiles. The authors specifically question the plausibility of liposomal bupivacaine's reported analgesic effects, noting inconsistencies in the data at different dosages and time points, and citing a recent meta-analysis that found pain score differences below the minimal clinically important threshold.

What Rigorous Methods Validated These Guidelines?

The review employed a rigorous methodology registered on PROSPERO (CRD420251013056), searching multiple databases including CINAHL, CENTRAL, EMBASE, MEDLINE, and Web of Science for relevant studies published between January 2019 and November 2024. The PROSPECT approach goes beyond simple statistical analysis of available evidence, incorporating clinical context, baseline analgesic techniques in control groups, and balancing benefits against adverse effects. Quality assessment using the Cochrane Risk of Bias Tool 2 was conducted for all included trials, and recommendations were developed through a modified Delphi consensus process among the working group members.

Why Were Some Interventions Deemed Insufficient?

The systematic review also evaluated several other interventions that ultimately were not recommended due to insufficient evidence. These included various surgical techniques such as the use of biodegradable magnesium versus titanium screws, piezoelectric tool systems with microvibrations for osteotomy, and different closure techniques. Additionally, postoperative modalities like dynamic splints, virtual reality hypnosis for preoperative anxiety, and comparisons between different types of postoperative footwear showed no significant advantages in terms of pain management. The authors explicitly detailed these non-recommended interventions in their review, providing clinicians with clear guidance on which approaches lack sufficient evidence for routine implementation.

The authors acknowledged several limitations in their review, primarily related to the heterogeneity among included studies in terms of control groups, dosing regimens, administration methods, and variable time points for pain assessment. Many studies had small sample sizes, potentially leading to estimation effects and insufficient power to draw valid conclusions regarding the safety profiles of the interventions. Additionally, analgesic interventions were not always evaluated against control groups that included an optimized multimodal analgesic regimen, which may have affected the interpretation of efficacy.

How Might Future Research and Practice Evolve?

Looking forward, the authors suggest that future research should focus on adequately powered trials assessing not only pain and opioid consumption but also functional outcomes, complications, chronic pain development, and chronic opioid use. They specifically highlight the need to investigate the effects of analgesic interventions in high-risk patients, particularly those identified as high pain-responders. The comprehensive nature of these updated recommendations provides clinicians with evidence-based guidance for optimizing pain management strategies in hallux valgus repair surgery, potentially improving patient comfort, reducing opioid requirements, and enhancing recovery outcomes.

As these recommendations become integrated into clinical practice, several questions arise for practitioners: How might the transition to minimally invasive techniques impact surgical training programs and equipment requirements? Could the emphasis on ankle blocks over popliteal blocks influence the development of specialized regional anesthesia protocols for foot and ankle surgery? And considering the multimodal approach recommended, how might these guidelines influence perioperative care pathways and discharge planning for patients undergoing hallux valgus repair? The evolution of these recommendations reflects the dynamic nature of evidence-based medicine and the commitment to improving patient outcomes through systematic evaluation of emerging data.

Summary

The PROSPECT Working Group has released updated recommendations for pain management in hallux valgus (bunion) repair surgery, marking a significant shift toward minimally invasive surgical techniques. Based on a comprehensive systematic review of 17 randomized controlled trials and seven systematic reviews published since 2019, the guidelines now explicitly recommend minimally invasive or percutaneous osteotomy approaches over traditional open surgery, citing compelling evidence of reduced pain scores at two weeks postoperatively. The core analgesic regimen remains multimodal, combining paracetamol with NSAIDs or COX-2 inhibitors, intraoperative dexamethasone, and opioids for rescue analgesia. Ankle block continues as the preferred regional anesthesia technique, while popliteal sciatic nerve block is discouraged due to mobility impairment. Despite promising preliminary data, the working group did not recommend emerging adjuncts such as perineural magnesium sulfate or liposomal bupivacaine due to limited evidence and concerns about biological plausibility. The review, which employed rigorous methodology including PROSPERO registration and Cochrane Risk of Bias assessment, also evaluated and rejected several interventions lacking sufficient evidence, including biodegradable magnesium screws, piezoelectric tools, and various postoperative modalities. The authors acknowledge limitations related to study heterogeneity and small sample sizes, calling for future research on functional outcomes, chronic pain development, and interventions tailored to high-risk patients. These evidence-based recommendations provide clinicians with clear guidance for optimizing perioperative pain management in this common orthopedic procedure that typically results in moderate to severe postoperative pain.