Bag-mask ventilation (BMV) is a critical intervention for children in respiratory failure, yet most pediatric providers fail to perform it correctly, tripling the risk of complications such as low oxygen levels and cardiac arrest. CapnoSense is a watch-sized, AI-enabled device that integrates with standard bag mask ventilation equipment and uses exhaled carbon dioxide to deliver real-time, objective feedback on breath quality to allow the provider to adjust her technique in real time and improve care of critically ill children.