Manipal Journal of Science and Technology


Many respiratory-related diseases that require urgent ventilation have become more prevalent recently. Since the world is in the grip of a pandemic, ventilation has become a true treatment step. So, accepting this as the motivation, this paper presents a low-cost mechanical ventilator to address the major issue. This ventilator ensures that lung activity runs smoothly and effectively. The electronic components used over here are Raspberry Pi, Arduino, pressure sensors, servomotors, etc., and Python programming as a software part. Here we propose three parameters of lung activity. They are the I: E (Inspiratory to Expiratory) ratio, air volume, and respiratory frequency. These parameters are given to the pressure sensor which will act as the input to the electronic and mechanical schematic of the ventilator. The data collected is sent to Raspberry Pi. Then we propose the usage of a servo motor with input signals given in the form of pulse-width modulation (PWM). The servomotor operation frequency was fixed at 50 Hz by the manufacturer. This paper also shows a numerical method for monitoring the patients’ pulmonary condition. The method considers pressure measurements from the inspiratory limb and alerts clinicians in real time whether the patient is in a healthy or unhealthy situation.

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