PC-based spirometer with flow sensor

Abstract

The respiratory system is a respiratory system that is used for gas exchange processes, where the respiratory system is one of the systems that plays a very important role in the body to support survival. By definition, chronic obstructive pulmonary disease (COPD) can be referred to as a progressive chronic disease of the lungs which is characterized by obstruction or obstruction of air flow which is irreversible or partially reversible and causes significant extrapulmonary consequences that contribute to the patient's severity. A spirometer is a tool used to measure and diagnose the condition of human lungs. The aim of this research is to develop previous research, namely by replacing the pressure sensor with a flow sensor and using the Visual Studio display on a PC. The design of this tool consists of an Arduino microcontroller and a flow sensor. The sensor is connected directly to the microcontroller as a voltage source and controller for the sensor's work which will then be displayed on the Nextion LCD and Visual Studio. with a Bluetooth connection connected to a PC with a Visual code display. Data collection will be connected to a calibrator tool using a Tube with 6x repetition. When making the module, use the measuring parameters FVC, FEV1, VCE and VCI. From the results of the spirometer module test with a comparison tool carried out in 10 respondents with 6 repetitions found an error of 3.3% for the FVC parameter and 10.6% for the FEV1 parameter. From the results of this study it can be concluded that the flow sensor can be used to determine the volume of the lungs. Furthermore, this development can be used to check FVC, FEV1, VCE, and VCI values, the results of which can be displayed in real time on the Nextion LCD or displayed in Visual Studio to produce numbers and graphs.