Development and functional testing of the bag valve mask of automatically squeezing and controlling tidal volume
Zeng Qing
Li Dongmei
Yang Xiangmei
Chen Ai
Wu Jun
Abstract：Objective To develop a simple respirator capable of automatically squeezing and controlling tidal volume and to explore its function.Methods Under standard test conditions,the apparatus,ventilator detector and simulated lungs were connected through respiratory lines,and its function was tested under different interventions.The tidal volume,respiratory rate and expiratory time/inspiratory time ratio were recorded.The analysis of variance or Friedman test was used for comparison of measurement data,and the Chi-square or Fisher exact test was used for counting data.Its respiratory parameters were evaluated to see if they met the performance index requirements,thus verifying the accuracy of the main respiratory parameters of the apparatus,and the safety and stability of its use.Results Under the standard experimental conditions,the maximum output-errors of tidal volume,respiratory rate and expiratory time/inspiratory time ratio of the simple ventilator with automatic compression and precise control of tidal volume were within±15%,±10%and±10%,respectively,and the calibration points of some commonly used respiratory parameters were all highly accurate,and the respiratory parameter data remained accurate and stable even after 3 h of ventilation.Conclusions The respiratory parameter data of the simple ventilator with automatic compression and precise control of tidal volume is accurate,stable and reliable,which improves the ventilation efficiency of the simple ventilator to a certain extent,and saves the operator's manpower and training cost.
Keywords：Bag valve maskVentilationConstant tidal volumeCardiopulmonary resuscitationRespiratory rateExpiratory time/inspiratory time ratio
Publication Date：2024-02-10
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 128-132 )