摘要
目的 :通过实验的方法确定碎石机循环水的最大溶氧质量浓度,确保碎石过程中不产生可见气泡。方法:介绍碎石机脱气方法现状及临床对水质的要求,用AZ8403型溶氧测试仪测量循环水的溶氧值,对不同溶氧质量浓度的循环水,在7.5 L水容量、35 L/h水流量、环境温度28℃、最高放电电压17 k V、放电频率60次/min条件下,连续放电1万次,观察是否有可见气泡产生,从而得出不产生可见气泡条件下的最高溶氧质量浓度。结果:在环境温度28℃条件下,循环水溶氧质量浓度大于3.37 mg/L时,会产生可见气泡;溶氧质量浓度小于3.34 mg/L时,不会产生可见气泡。结论:电磁式体外冲击波碎石机在环境温度28℃条件下,循环水的溶氧质量浓度应该低于3 mg/L。
Objective To measure the maximum dissolved oxygen concentration of the lithotripter to avoid visible air bubbles during lithotripsy. Methods The present situation of degassing of lithotripter and clinical requirements for water were introduced. Under the following conditions of 7.5 L water capacity, 35 L/h water flow, ambient temperature 28 ℃, 17 k V, 60 shocks per minute, the lithotripter discharged 10 000 shocks continuously without a visible air bubble in the circulating water, then the dissolved oxygens in the water were measured by using AZ8403 dissolved oxygen meter. The maximum value of dissolved oxygen in the water was determined therefore without a visible air bubble. Results The visible tiny air bubble emerged during lithotripsy if the dissolved oxygen in the water was above 3.37 mg/L and ambient temperature was about 28 ℃;the bubble could be avoided if the dissolved oxygen was under 3.34 mg/L and ambient temperature was about 28 ℃.Conclusion The circulating water with dissolved oxygen concentration less than 3 mg/L and about 28 ℃ ambient temperature are recommended for the electromagnetic extracorporeal shock wave lithotripter during lithotripsy.
出处
《医疗卫生装备》
CAS
2017年第10期79-82,共4页
Chinese Medical Equipment Journal
关键词
体外冲击波碎石机
循环水
溶氧质量浓度
真空脱气膜
溶氧测试仪
extracorporeal shock wave lithotripter
circulating water
dissolved oxygen concentration
vacuum degassing membrane
dissolved oxygen meter
