A system and a method monitor the useful and safe life of a pulse oximetry sensor. According to one embodiment, the system includes a sensor having a timer and a sensor life indicator. The sensor life indicator may advantageously include a visual alarm, an audio alarm, a vibrational alarm, a power down...http://www.google.ca/patents/US6515273?utm_source=gb-gplus-sharePatent US6515273 - System for indicating the expiration of the useful operating life of a pulse oximetry sensor
