[A case of coring on using a 1% Diprivan vial].

We report a case in which two fragments due to coring from the rubbercap of a 50 ml Diprivan vial were detected only immediately before infusion to a patient. The attending anesthesiologist noticed the foreign bodies by chance. The rubbercap was punctured only once, but the two foreign bodies from the syringe were proved to be from the rubbercap by infrared spectrometer analysis. It is difficult to recognize the small fragments in Diprivan which is white unclear emulsion. Therefore, anesthesiologists should be aware of the danger of coring.