Abstract
Two patients with postamputation stump and phantom limb pain respectively responded favorably to intrathecal fentanyl which temporarily abolished the pain, normalized sensations and produced euphoria without supraspinal effects. One of the patients subsequently received intrathecal, extradural and intravenous fentanyl as well as intrathecal lidocaine. The neuraxial (intrathecal and epidural) fentanyl temporarily abolished the pain. Intravenous fentanyl and intrathecal lidocine were unable to reproduce this effect. Neuraxial fentanyl apparently produced its effects by a segmental spinal action. Spinal modulation of postamputation pain was important in these patients.
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