Applications of heating infusion rewarming device for helicopter aeromedical evacuation
Objective To analyze how the liquid temperatures at the end of the infusion tube are affected in order to facilitate the evacuation and rewarming by helicopters.Methods Using the control variable method,the effects of heating temperatures of the heating infusion rewarming device,infusion flow rate,infusion tube length and insulation layer on liquid temperatures at the end of the infusion tube were monitored in the ground cabin and flight environment respectively before the influencing factors were analyzed.The temperature values at each point of the infusion tube were calculated via interpolation,and fitting calculation was carried out for the common parameters of infusion.Results The heating temperature of the heating infusion rewarming device was set at 42 ℃,and the infusion flow at 50,100,160,240,320,400,500 ml/h and 600 ml/h respectively.The results showed that the temperatures at the beginning and the end of the infusion tube gradually decreased with the increase of infusion flow.When the infusion flow rate is 240～320 ml/h,the liquid temperature at the end of the infusion tube is the highest.The liquid temperatures of the infusion tube changed with the flow rate in the flight environment and on the ground.The data other than the test points was calculated quantitatively,and the surface map temperatures at each point was obtained.The results calculated using different interpolation methods were consistent.The results of fitting calculation showed that linearity was good when the liquid flow rate ranged from 240 to 320 ml/h,and the error between the calculated results and the experimental data was below 0.5 ℃.Conclusion The experimental data on and patterns of temperature change of infusion liquid are of referential value for nursing operations related to evacuation and rewarming by helicopters.
Medical evacuationHeating infusionControl variable method
NETL
NSTL
万方数据
