NC-BVP-H (head module):The BVP sensor provides a photoplethysmography (PPG) signal when connected to a NeXus signal acquisition device, that corresponds with variations in peripheral blood flow resulting from cardiovascular activity and responses, with the purpose of providing information on the cardiovascular variations such as heart rate variations and measured pulse amplitude. The sensor output is not intended to be used for vital monitoring purposes.The device is designed for medical use, not restricted to a specific medical indication, for acquisition of physiological signals. The device is intended to be used by, or under supervision of, a health professional within a clinical environment.
An instrument that measures the amount of light emitted by a light source, e.g., a light-emitting diode, as reflected from a sample in order to determine the concentration of an element. The device usually contains a photodiode for light detection.