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目的:观察高压氧舱内气压变化对容量型输液泵使用安全性和泵速准确性的影响。方法:在高气压(表压0～0.10 MPa)和常压(北京地区大气压力)环境下，使用容量型输液泵泵速实时监测系统，测定输液泵设定流量为50、100 ml/h时的瞬时流量和平均流量，每种流量重复测定7次。观察容量型输液泵在高气压环境下(表压0～0.10 MPa)的使用情况，并比较在2种环境下输液泵的瞬时流量和平均流量。结果:高压氧舱内匀速加、减压及高压稳压过程中，容量型输液泵可正常使用，未出现电器安全事故及使用故障。设定输液泵流量为50、100 ml/h时，输液泵的瞬时流量和平均流量在高气压(表压0～0.1 MPa)和常压环境下，测得结果差异无统计学意义(n P>0.05)，流量相对示值误差均在±2%之内。n 结论:容量型输液泵可在高压氧舱内安全使用，且泵速准确。“,”Objective:To observe the influence of air pressure change in the hyperbaric oxygen chamber on the safety of the volumetric infusion pump operation and the accuracy of the flow rate.Methods:The instantaneous flow rate and average flow rate of the volumetric infusion pump set at the flow rates of 50 and 100 ml/h were repeatedly measured for 7 times by the real-time flow rate monitoring system under high air pressure (gauge pressure 0-0.10 MPa) and normal pressure (atmospheric pressure in Beijing), respectively. The operation status of the volumetric infusion pump in the high-pressure environment (gauge pressure 0-0.10 MPa) was observed, and the instantaneous flow rates and average flow rates of the volumetric infusion pump under both high and normal pressures were compared.Results:The volumetric infusion pump could operate smoothly, and no electrical safety accident or malfunction occurred in the scenarios of uniform pressurization and decompression and high-pressure stabilization in the hyperbaric oxygen chamber. When the flow rate of the infusion pump was set at 50 and 100 ml/h, comparing the instantaneous flow rate and average flow rate under the high pressure (gauge pressure 0-0.1 MPa) and the normal pressure environment respectively, there was no statistically significant difference (n P>0.05), and the relative indication errors of the flow were all within ±2%.n Conclusion:The volumetric infusion pump can safely operate and maintain accurate flow rate (50 ml/h and 100 ml/h) in hyperbaric oxygen chamber.