Patent attributes
Various examples of methods and systems related to thermistor sensing for measurement of respiration are shown. In one example, a breath sensing system includes a self-heating temperature sensor that can be positioned in respiratory air of a subject and processing circuitry that can monitor operation of the self-heating temperature sensor. Respiratory information associated with physical or physiological properties of the subject can be communicated to a remotely located computing device. Electronic switching circuitry can be included to change operation of the self-heating temperature sensor between a temperature sensing mode and a heated power dissipation sensing mode. The processing circuitry can control switching between the modes. In another example, a method includes monitoring operational conditions of a self-heating temperature sensor positioned in respired air and determining, e.g., breath velocity, breath period, breath volume, breath carbon dioxide level, and heart rate based at least in part upon the operational conditions.
