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Knots formed when inserting a catheter for epidural anesthesia have an incidence rate of 0.0015%, which is extremely rare. In most cases, knots are formed when the epidural catheter is twisted and not inserted straight into the epidural space. The case reported here represents a clinical experience in which the epidural catheter – which could not be easily removed due to knot formation in the subcutaneous tissue, particularly when removing the catheter after insertion by force despite resistance at the entrance of the epidural space with a Tuohy needle – was successfully removed without side effects or complications. CASE

Knot Formation at Removal of an Epidural Catheter Placed Against Insertion Resistance Encountered at the Entrance of the Epidural Space