Monitoring of Blood Pressure Using Photoplethysmographic (PPG) Sensor with Aromatherapy Diffusion

Continuous blood pressure monitoring is an important procedure for checking the conditions of the elderly people, especially those who experience hypertension or hypotension. However, existing Blood Pressure measuring devices neither have a way to automatically indicate whether a Blood Pressure reading is either above or below the acceptable normal range, nor a way to provide “first aid” for it; nor activate an alerting device to the people who are directly caring for them. In this paper, the proponents developed a system, which uses Photoplethysmography to sense the pulse of a person, non-invasively and cufflessly, to derive the blood pressure reading. The indication of an occurrence of a high blood pressure or a low blood pressure is determined by an algorithm that may trigger the alerting mechanism of the system to activate a quick application of aromatherapy by inhalation (using essential oils) to the elder to make his/her blood pressure lower (when hypertension occurs) or vice versa.