Efficacy of peripheral nerve stimulation in refractory postamputation pain: A narrative review

The management of postamputation pain remains a significant clinical challenge, with existing therapeutic approaches often yielding inconsistent outcomes. Neuromodulation techniques, particularly peripheral nerve stimulation (PNS), have emerged as promising interventions. However, the evidence supporting their effectiveness in treating phantom limb pain (PLP) and residual limb pain (RLP) remains limited. This narrative review consolidates previous findings of PNS as a postamputation agent and amasses the most recent data on its effectiveness in clinical settings. A literature review was conducted using MEDLINE via PubMed, EMBASE, and Cochrane Library, yielding 115 references. After removing duplicates and applying inclusion criteria, three studies were included. The studies reviewed demonstrate that PNS can offer varying degrees of sustained pain relief, mood enhancement, reduction in opioid use, and functional improvement. However, discrepancies in study design, patient demographics, devices used, and methodological approaches significantly limit the generalizability and reliability of these findings. Currently, the evidence supporting PNS for the treatment of RLP and PLP is limited, with minimal data affirming its efficacy in alleviating postamputation pain and related symptoms. More studies, especially larger, well-designed comparative and observational studies are needed to extrapolate these conclusions for PNS and postamputation pain.