Development and Efficacy of the Automatically Squeezed Bag-Valve-Mask with Tidal Volume Control
Objective To develop a bag-valve-mask(BVM)which can automatically squeeze to control the tidal volume,and to explore the effect of its application on mannequins.Methods Based on the original BVM,a BVM which can automatically squeeze and control tidal volume was designed,and 36 medical staffs from The First Affiliated Hospital of Chongqing Medical University were selected to apply this instrument,under the 4 conditions of tidal volume of 400,500,600 mL and conventional artificial squeeze breathing apparatus,a single EC technique was used to ventilate each mask on the mannequin for 30 min,and the ventilation success rate and ventilation frequency of each group were compared.Results The ventilation success rate at the same time point of the 3 groups of instruments were significantly higher than that of the manual group(P<0.001);the ventilation frequency at the same time point of the manual group was significantly higher than that of the 3 groups of instruments(P<0.001),and the ventilation frequency at all time points of the manual group was significantly higher than that of 12 times/min.Conclusion The BVM with dynamic squeeze control of tidal volume is an automatic,easy to operate new medical device and can assist the ventilation of the BVM.The initial application on the mannequin has obvious effect,which improves the ventilation quality of the simple ventilator to a certain extent,ensures its safety and effectiveness.
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