The study design is to validate the pulse and heart rate accuracy as required per ISO 80601-2-61, Clause 201.12.1.104. The study is a non-randomized, non-blinded single arm design to evaluate the clinical accuracy of the ND's pulse rate measurement compared to a reference heart rate manually measured by observing R-peaks in a standard concurrently recorded ECG from an FDA 510(k)-cleared reference clinical ECG (RCECG). The study will be conducted within an Emergency Department where each subject is assigned an Emergency Severity Index (ESI) score. Only subjects with ESI scores ranging from 3-5 will be recruited for the study to prevent intervening with standard patient care. The sponsor will ensure that the study staff enrolls a range of types of arrhythmias including tachycardia, bradycardia, atrial fibrillation, bigeminy, trigeminy, and others.
The study will evaluate the root mean square (RMS) error of measuring pulse rate using the Norbert Device as compared to a reference heart rate measured using an electrocardiogram (ECG).