Figure 3.

Interface for the patient data collection app, implemented in Android Java. Exemplar test data are shown. The status of the wearable device can be observed at the top of the image, with both the VitalPatch® and the Nonin devices in “Connected” state, and with serial numbers “016AC4” and “502854048,” respectively. The top right icons enable (from left to right): restarting the app; checking the connexion status with the back-end server; checking the charging and battery status; and entering the app settings. The patient can be unregistered by pressing the outlined “ × ” icon on the right of the patient information field. The live vital-sign and waveform data (ECG, Electrocardiogram, and Pleth, Photoplethismography) values are displayed on the right side and left side of the app, respectively. The lower right icon locks the app screen, leaving only the lower left clock displayed. In this case, the monitoring and streaming of the vital-sign data occur in the background, likely to be a less distracting mode for patients (particularly useful at night, because of the light emitted by the tablet). IBME, Institute of Biomedical Engineering; MRN, Medical Record Number; bpm, beats per minute; rpm, respirations per minute; HR, Heart Rate; RR, Respiratory Rate; TEMP, Temperature; SpO₂, peripheral blood Oxygen Saturation.