线性气阻对呼吸机容量控制的影响OA

Objective To discuss the influence of linear and parabolic air resistance on the capacity control of ventilator according to the new requirements of GB 9706.212-2020 standard for control accuracy,and provide guidance for optimizing the control algorithm and detection specification of ventilator.Methods In this paper,the hydrodynamic characteristics of linear and parabolic impediments and their effects on the control accuracy of tidal volume were compared by ventilator ventilation experiment.Results The experimental results showed that the control error of a ventilator was 9.6%when using parabolic resistance under R5 conditions.When linear resistance was used,the control error increased to-39.0%,and the flow value in the airway decreased significantly.Tidal volume control behaves differently with different resistance settings,especially at low resistance settings where linear resistance resistance may lead to large tidal volume errors.Conclusion Simulated pulmonary resistance can affect the accuracy of tidal volume output of ventilators.Manufacturers need to optimize the control algorithm according to the new standard to ensure that the equipment meets the requirements.