Air Pressure Control on Ventilator using Fuzzy Logic Method

In a virus outbreak that attacks human respiration, there is an increase in the need for ventilators that is not proportional to their availability. A ventilator is a device that serves to assist or replace normal ventilation functions in people who have respiratory problems. The lungs are important organs in the respiratory system. The lungs can inflate if the atmospheric pressure is greater than the lung pressure (Palv). Conversely, the lungs can deflate if the atmospheric pressure is less than Palv. In the process of inspiration, air flows from outside to the alveoli, increasing oxygen levels. The faster oxygen is introduced into the alveoli from the atmosphere, the higher the oxygen concentration in the alveoli. So that the oxygen concentration in the alveoli is controlled by the speed with which new oxygen enters the lungs through the ventilation process. In people who have respiratory problems, the body is less able to supply the oxygen needs of the lungs so that the flow of air pressure that flows into the lungs must be controlled. A ventilator is made with the principle of pressure difference. Atmospheric pressure is set greater than Palv so that air enters the lungs. In contrast, atmospheric pressure is set to be less than Palv to force air out of the lungs. The outside air pressure can be increased by providing positive pressure air from the airflow drive device. With the Fuzzy Logic control method, the speed of the airflow drive device is adjusted to meet the patient's needs. Ventilators that have been designed and manufactured can provide air pressure in the pressure range of 0 to +50 cmH2O or the equivalent of 0 to 0.711167 psi. The basic pressure at the end of the breath is set to be equal to atmospheric pressure.