ChroniSense Polso Wrist Worn Respiration Rate Validation Study

20 volunteer test subjects will be entered into an accuracy study that is designed to validate accuracy of the respiratory rate of the Polso Monitoring system. A range of stable respiratory rates will be elicited from each volunteer test subject. The rates will be approximately 5, 10, 15, 20, 25, 30, 35, 40 and 45 breaths per minute; with some natural variation from these exact numbers. Each subject will be instrumented with an open system mask that allows for measurement of the end tidal carbon dioxide (EtCO2) respiratory rate and tidal volume. The EtCO2 monitor will be used as the Accuracy Reference Device (Reference) in this study.