Knotting of an epidural catheter. A rare complication. Report of two cases

Introduction Inserting a catheter into the epidural space is an anesthetic technique, not exempt from complications. Catheter knotting and retention are rare complications. Clinical findings, diagnostic evaluation and interventions: Two cases of epidural catheterassociated complications are discussed. The first was due to the development of a spontaneous knot and the second due to retention and then rupture; both cases required surgical removal. Conclusion To prevent these potential complications, refrain frompassing excessive catheter length and do not leave more than 5 cm of catheter into the epidural space. If a catheter cannot be easily removed, try using several maneuvers and if these fail or there is any pain or paresthesia, diagnostic imaging is required to locate the catheter and request neurosurgery support.