Automation in Flow Meter Systems

Abstract

The administration of oxygen therapy to patients at risk of hypoxemia or already experiencing hypoxemia requires vigilant monitoring by nurses. This practice ensures that the oxygen flow meter valve is adjusted appropriately based on the patient’s SpO2 levels. The research objective is to facilitate nurses’ tasks in monitoring patients’ SpO2 levels and automatically regulate the opening of the oxygen flow meter valve. The research contribution lies in a system that monitors patients’ oxygen levels and automatically adjusts oxygen therapy delivery. To achieve precise valve control corresponding to the patient’s SpO2, the researchers developed a mechanical system directly connected to the SpO2 sensor. A fingertip sensor attached to the patient’s finger detects SpO2 levels, which are then processed by a microcontroller to regulate the oxygen flow meter valve. During SpO2 readings of 89%–91%, the valve operates at 2 LPM; for readings below 88%, the valve opens to 6 LPM. Conversely, when SpO2 readings exceed 92%, the oxygen flow meter valve intermittently closes. The research findings indicate that valve openings within the 92%–88% range exhibit an average error of 1%–2%.