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Unilateral Analgesia Following Epidural Block

A case of true epidural left hemianalgesia is reported in a man scheduled for elective surgery of the right lower limb. The patient was radiologically diagnosed as having a right unilateral distribution of local anesthetic in the epidural space. The most likely cause is the presence of congenital membranes or posttraumatic adhesions. In such a complication the contralateral paraspinous approach to the epidural space is recommended.