Generally used to indicate a patient requiring immediate resuscitation, most often as the result of a cardiac arrest. May also be used as a radio call to indicate that a patient en route to the hospital requires resuscitation. "Code Blue - Adult" or " - Pediatric" are sometimes used to provide additional information about the patient. HASC have suggested these codes be replaced by "Code Blue" and "Code White", respectively.
Adult medical emergency (in contrast to Code White for pediatric medical emergency) per Healthcare Emergency Codes (New Jersey Hospital Association).
Adult medical emergency in Australia (for instance, VT/VF, fall is GCS of > or = 2, bradycardia, accelerated HTN).
Tornado warning - patients moved to interior corridors, staff and visitors seek shelter immediately (William Beaumont Hospitals, Royal Oak and Troy, MI)