Low cost volume sensors for mechanical ventilators

This paper presents and compares three volume sensors to be used in mechanical ventilators developed laboratory: sensor based on the Pitot tube, Venturi tube infrared(IR) sensor. The were calibrated tested with a ventilator Pressure-controlled Ventilation (PCV) mode. maximum pressure changed, keeping textitPositive End-Expiratory Pressure (PEEP) respiratory rate fixed. For each value: value measured by was compared reference value, informed ventilator. infrared showed better performance for specific application ventilator, being only considered adequate between ones.