Reports on an anesthesia event in Taunton, England involving the malfunction of a prefilled propofol syringe resulting in a failure to deliver total intravenous anesthesia (TIVA). Use of Tiva to anesthetized a patient for a laparoscopic cholecystectomy; Disconnection of the plastic flange containing the blue identification microchip from the glass syringe; Lessons learned from the event .