CAJ | 학술논문

背景:加强体外循环期间的监测可以减少体外循环相关的死亡率.液位、压力监测是体外循环的重要检测项目,是患者的生命线,对体外循环中液位、压力的监测是必不可少的.目的:设计液位、压力报警器并探讨其可行性及临床应用价值.方法:液化、压力报警器由压力传感器、光电发射器、光电探测器、控制核心及液晶显示模块等部分组成.利用光线的折射及反射原理,光线在两种不同介质的分界面将会产生反射或折射现象.压力的大小变化通过压力传感器转换成相应的电信号的强弱变化.根据上述两种原理,设计液位、压力报警器.以30例年龄1～75岁,需体外循环下行心脏手术患者为对象,观察体外循环中不同灌注流量时体外循环管道内压力的变化及低于设定液面时液位是否报警.结果与结论:体外循环管道内泵压随流量增加而增加,HZ-01-A型液位、压力变化报警器及机械压力表测得的压力都随流量增加而增加,具何近乎一致的相关关系,HZ-01-A型液化、压力变化报警器及机械压力表测得数值无统计学差异.当体外循环管通内压力变化超过设定压力及储血器内液面低于设定液面时,HZ-01-A型液位、压力变化报警器可以声光报警.HZ-01-A型液位、压力变化报警器在体外循环中可以安全、准确地监测泵压的变化及液面位置,提高体外循环的安全性.
배경:가강체외순배기간적감측가이감소체외순배상관적사망솔.액위、압력감측시체외순배적중요검측항목,시환자적생명선,대체외순배중액위、압력적감측시필불가소적.목적:설계액위、압력보경기병탐토기가행성급림상응용개치.방법:액화、압력보경기유압력전감기、광전발사기、광전탐측기、공제핵심급액정현시모괴등부분조성.이용광선적절사급반사원리,광선재량충불동개질적분계면장회산생반사혹절사현상.압력적대소변화통과압력전감기전환성상응적전신호적강약변화.근거상술량충원리,설계액위、압력보경기.이30례년령1～75세,수체외순배하행심장수술환자위대상,관찰체외순배중불동관주류량시체외순배관도내압력적변화급저우설정액면시액위시부보경.결과여결론:체외순배관도내빙압수류량증가이증가,HZ-01-A형액위、압력변화보경기급궤계압력표측득적압력도수류량증가이증가,구하근호일치적상관관계,HZ-01-A형액화、압력변화보경기급궤계압력표측득수치무통계학차이.당체외순배관통내압력변화초과설정압력급저혈기내액면저우설정액면시,HZ-01-A형액위、압력변화보경기가이성광보경.HZ-01-A형액위、압력변화보경기재체외순배중가이안전、준학지감측빙압적변화급액면위치,제고체외순배적안전성.
BACKGROUND: Mortality related to cardiopulmonary bypass can be lowered by intra-operative monitoring system.Monitoring liquid level and pressure is extremely indispensable for examination of cardiopulmonary bypass(CPB).OBJECTIVE: To design a CPB safety system including an arterial line pressure monitor and low-level sensor,and to evaluate its safety and effects in clinical settings.METHODS: The safety system was composed of pressure transducer,photoelectric transmitter,photoelectric detector,core controller,and liquid crystal display.The principles of reflection and refraction were applied to the design of level sensor.The pressure measurements were converted into electronic signals and processed.According to two principles above-mentioned,fluid level detector and pressure monitor were designed.Thirty patients with the age of 1-75 years receiving cardiac surgery with cardiopulmonary bypass were enrolled.The arterial line pressure at different pump flows was measured and the alarm function of the level sensor was also validated.RESULTS AND CONCLUSION: Cardiopulmonary bypass arterial line pressure increased with the pump flow.Arterial line pressure detected by HZ-01-A safety system also increased with the pump flow increasing,which was highly related to the pump pressure.HZ-01-A safety system could alarm when the arterial line pressure and reservoir level exceeded the pre-determined thresholds.HZ-01-A safety system could be safely and effectively applied to clinical cardiopulmonary bypass and improve bypass safety by accurately detecting the pressure and reservoir level.