Fig. 2

Automated code blue alert and activation system diagram. A patient has a set of vital sign measurement collected by Phillips monitor and validated into EMR system by nurse. Then the vital signs will be further processed through an early warning scoring system configured by a proprietary algorithm in the Phillips and EMR server. If any of the vital sign meets peri-arrest criteria, system will trigger an alert to the code blue phones which contains location of the patient; at the same time, the Philips monitor will give a local audio and visual alarm to remind the ward nurse to press the code blue button at bedside which will activate the Ward Annunciator to display the “Code B” message