Intra-operative epidural catheter migration into subarachnoid space leading to massive subarachnoid injection of morphine--a case report.

Epidural catheter (EC) migration is well documented entity in literature. However, most of these reports are consistent with introduction of Tuohy needle, either partially or completely, into intravascular, subdural and subarachnoid spaces prior to the placement of catheter. We report an intra-operative delayed migration of epidural catheter into subarachnoid space after apparently normal needle placement and negative test dose.