• Reg Anesth Pain Med · Jan 2007

    Case Reports Clinical Trial

    Falls associated with lower-extremity-nerve blocks: a pilot investigation of mechanisms.

    • Samuel I Muraskin, Bryan Conrad, Naiquan Zheng, Timothy E Morey, and F Kayser Enneking.
    • Department of Anesthesiology, University of Florida, Gainesville, Florida 32610, USA.
    • Reg Anesth Pain Med. 2007 Jan 1;32(1):67-72.

    ObjectiveDocumented falls after lower-extremity-nerve blocks are rare. We believe this paucity of documented falls is the result of underreporting and the lack of serious complications resulting from these falls. In addition, the mechanism(s) for falls after lower-extremity-nerve blocks has not been elucidated.Case ReportsThese reports highlight the mechanism of fall in a patient with a femoral-nerve block (FNB) and in a patient with a femoral-nerve and sciatic-nerve block (FNB/SNB). In addition, we report our findings when volunteers underwent FNB, sciatic-nerve block (SNB) and FNB/SNB and were studied in a gait-analysis laboratory.ConclusionsLower-extremity-nerve blocks result in decreased leg stiffness and lateral instability, which may lead to difficulty with pivoting maneuvers.

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