[An anesthesia machine malfunction due to dew condensation produced by abnormally high humidity in the electronically-controlled panel].

We present a case of anesthesia machine (NAR-KOMED 2CTM; N2C) malfunction caused by dew condensation. N2C is electronically controlled by an alarm-panel using the remote display. Abnormally high humidity in the operating room made dew condensation in the alarm-panel resulting in an electronic short circuit. Of great importance may be the damp proof improvement on medical equipment including anesthesia machines which have electronic circuits.