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Aim Limb amputations have many post-op complications, including pain. The evidence supporting the use of nerve sheath catheters (NSC) to manage post-op pain is mixed. Current literature suggests NSC reduces post-op opioid requirements but does not reduce pain score, phantom limb pain or chronic stump pain. This study compared post-op pain in those with and without NSC after above knee amputations (AKA) and below knee amputations (BKA). Method Retrospective data from April 2014 – March 2017 was reviewed. Information regarding indication, anaesthetic, morphine requirement at 72 hours, phantom limb, chronic limb pain and a pain scale (1-10) at 24, 48 and 72 hours were collected. Results 32 patients were involved in the study. 11 had NSC for pain control. Of those patients without NSC, 43% experienced no pain. In comparison, 33% of those with NSC experienced no post-op pain. Phantom limb pain was experienced in a higher proportion of patients with NSC (18%) and in those with AKA (11%). 18% of patients with NSC experienced chronic limb pain, compared to 33% without NSC. 62% of patients with NSC required morphine at 72 hours and at higher dosages compared to those without. However, two patients used large amounts of morphine potentially giving spurious results. Conclusions Though limited by small patient group, patients with NSC were more likely to require morphine at 72 hours and at higher dosages but were less likely to experience chronic limb pain thus proving the role of NSC in post-op pain control.

488 An Evaluation of Pain Related Outcomes Following Nerve Sheath Catheter Insertion after Major Lower Limb Amputations