[Delayed subarachnoid migration of an epidural catheter: a case report]

We often experience migration of an epidural catheter into an undesirable space. Migration of an epidural catheter into the subarachnoid space is a potentially lethal complication. Although almost all migrations of epidural catheters have been reported to occur at insertion of the catheter, we experienced a case of catheter migration into the subarachnoid space two days after its insertion. The symptoms caused by this migration were motor paralysis in the lower extremities and sensory disturbance of the trunk. Neurological and hemodynamic changes in a patient who is undergoing continuous epidural infusion of local anesthetics should be monitored carefully.