Advantx LC~+系统结构及常见故障检修

本文介绍美国GE公司Advantx LC+系统结构及在使用过程中常见的故障及检修方法。     

苏星SX435-B洗片机原理分析及常见故障检修

对苏星SX435-B的电路原理进行分析,对工作中碰到的几例故障检修进行总结。     

金宝AK200血液透析机故障排除例举

目的:探讨金宝AK200血液透析机故障代码5.10.006的检测方法。方法:通过介绍5.10.006故障的原理,分析造成故障发生的原因。结果:依据原理对故障进行分析与排除,能够做到事半功倍的效果。结论:引起5.10.006故障的原因较多,只有掌握血液透析机故障的原理,分析其原因才能有效的对机器进行维修。     

Inappropriate implantable cardioverter-defibrillator discharges unrelated to supraventricular tachyarrhythmias.

AIMS: The development of implantable cardioverter-defibrillators (ICDs) with QRS morphology discrimination and dual-chamber sensing capabilities has improved the differentiation of supraventricular from ventricular tachycardias (VTs). Inappropriate ICD discharges may result from extracardiac signals caused by electromagnetic interference (EMI), because of electric fields and leakage currents from domestic or medical electrical devices, damaged sensing leads, and various cardiac and extracardiac signals that mimic VT and/or ventricular fibrillation. The aim of our study was to determine retrospectively the incidence and clinical relevance of these ICD behaviours and offer possible therapeutic solutions. METHODS AND RESULTS: We have observed inappropriate discharges unrelated to supraventricular arrhythmias in 13 (3.9%) of the 336 patients implanted with ICDs in our centre from 1989 to 2005. Seven patients received inappropriate shocks following exposure to external EMI: improperly grounded electric stove, electrically powered watering system, hydro-massage bath, electrical pruner, electrocautery current during cardiac surgery, transcutaneous electric nerve stimulation. In four patients, spurious discharges were related to internal noise of the ICD system from inappropriate lead connections. In two cases, erroneous antitachycardia therapy was delivered following different body signals oversensing (T-wave oversensing, wide QRS double-counting and myopotentials). In nine patients, non-invasive solutions prevented further inappropriate therapies (avoidance of EMI, malfunctioning atrial lead exclusion, ventricular sensing reprogramming). In four patients, surgical revision of the system was required (lead connections or position revision). CONCLUSION: In our experience, inappropriate ICD discharges unrelated to supraventricular arrhythmias occurred in about 4% of ICD patients. A careful evaluation of clinical data and telemetric information (lead impedance, sensed R-wave, stored electrograms) is essential in order to understand the nature of inappropriate ICD discharges and to select the most appropriate solution.     

医用计算机系统特点与故障维修

针对医用计算机系统的特点与易发故障的分析,提出了大、中型医疗设备的一种维修思路,从而进一步加强医疗设备的维护管理,提高医疗设备的利用率。     

医科达直线加速器真空系统的工作原理及应用

目的:探讨医科达直线加速器真空系统的工作原理及其在诊疗应用中常见故障和解决方法。方法:阐述医科达直线加速器真空系统的第一级真空处理装置—真空泵车和第二级真空处理装置—溅射离子泵的工作原理与作用;探讨真空泵车的常用维护方法;分析常见的故障现象,并结合工作实际制定具体的维修方法。结果:通过掌握直线加速器真空系统的工作原理,针对常见的故障现象,制定有效的故障排除方法。结论:掌握直线加速器真空系统的工作原理,能有效减少维修时间,熟练排除技术故障,确保设备正常使用。     

GE Innova 3100 DSA水冷系统故障排除

通过对DSA运行中水冷系统原理分析,掌握在出现故障报警和故障现象时的处理方法,归纳出水冷机的循环液长期使用后需定期清洗并更换新液;工作环境室温不能高于20℃;每季度检查和清洗水箱与泵头的过滤网;每半年检查储水箱内水位情况等的维修经验,确保DSA的正常工作。     

GE 1.5T Signa HD磁共振梯度故障实例分析

介绍GE Signa1.5T HD核磁共振工作原理,分析梯度系统的两个故障,研究排除故障的方法,总结梯度系统的维修经验,以供医学工程相关人员参考借鉴。     

医用X光机的原理、维护和故障诊断

随着现代医疗技术的不断发展,X光机被广泛应用到医疗诊断中。简要介绍医用X光机的应用和维护,并列举西门子两款X光机的故障整修实例。     

DZG-50型高频铸造机维修实例分析

高频离心铸造机是口腔修复的必备技工设备,由于使用频繁,机械振动及磨损难免造成电路不能正常工作。做好定期日常维护,才能确保机器正常工作。对DZG-50型高频铸造机常见故障实例进行分析。