Data Acquisition Applications 198Data Acquisition in Pulmonary Ventilation 199 This paper presents the main parameters used in ventilation and how these can be determined with a DAQ board. For this purpose a DAQ system general presentation is made and some specific examples for the ventilation area are given. A system, which is meant to be a part of a ventilator tester, that can determine the leakage for a patient block is presented.
The main physical parameters used in ventilationThe ventilator introduces inside the patient gas with a certain flow rate and pressure to provide the oxygen needed for living. Blood oxygen concentration is monitored as a SpO2 parameter and should be close to 100%. The doctor needs to adjust and monitor a set of parameters, named ventilation parameters, to ensure a proper ventilation. These are pressures, flow rates, volumes, gas concentrations.
Ventilatory pressuresBasically, inside the lung, during the process of external respiration the pressures varies as in Fig. 1. and during ventilation as in Fig. 2.Pressures are very important in ventilation. Ventilatory pressures may not be too large, not to destroy the alveolar wall, but not too small either, to ensure that the lungs are filled with the necessary amount of gas.
Data Acquisition Applications 202Data Acquisition Applications 204
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