METHODS AND DEVICES USING PHOTOPLETHYSMOGRAPHY IN THE OPTIMIZATION OF CARDIOPULMONARY RESUSCITATION

Provided according to embodiments of the invention are methods of improving the effectiveness of chest compressions as part of cardiopulmonary resuscitation (CPR). Such methods include monitoring PPG signals from a PPG sensor secured to a nose during at least one chest compression and increasing, decreasing or maintaining a at least one of the depth, duration and frequency of at least one subsequent chest compression based on a waveform parameter of the PPG signals. Related devices and systems are also provided.