Peripheral nerve block catheter related complications have been reported extensively. Catheter shearing, knotting, retention and nerve entrapment of catheters have all been described in case reports. We came across a rare complication of an Arrow stimulating nerve block catheter used as a non-stimulating catheter. We report an unusual shearing of the internal coil in a stimulating peripheral nerve block catheter.
An 82-year-old lady was admitted to our hospital for a right Total Knee Arthroplasty. She had consented for an adductor canal catheter along with posterior knee infiltration (single injection) and lateral femoral cutaneous nerve block (single injection) followed by a spinal anesthetic which is the standard of practice for total knee arthroplasties at our institute. An Arrow® StimuCath® Stimulating cPNB Catheter with 80 mm Tuohy needle was used for adductor canal block.