Developing Algorithms and Programs for an Artificial Lung Ventilator
In this paper algorithms and programs for an artificial lung ventilator were developed, which can be widely used, and especially now for COVID-19 patients. The aim of the work is to develop a software system for the microcontroller STM32L151ZDTx-LQFP144 of the portable ventilator Axion A-IVL-E-03, which allows operation in different modes of ventilation, graphical display of the respiration dynamics and prompt messages to the operator during operation using voice prompts and light signals. The developed lung ventilation algorithms provide periphery management and monitoring the correctness of their work, handle alarm status using a display, voice prompts and light indication. In this research, we will consider modes of artificial lung ventilation, the algorithms of work, and compare the existing analogues. Mathematical models have been proposed for pressure-controlled ventilation as a tool that allows the physician to understand the important interaction between patient input parameters (frequency, applied airway pressure and inspiratory ratio) and clinically important parameters (tidal volume, average volume of minute ventilation). These mathematical models were applied and it was shown that they are a reasonable approximation of a complex process.