Siemens AR.SP型螺旋CT机故障一例

故障现象　扫描中RESET频繁 ,直至RESET复位无效 ,机架指示灯灭 ,且机架中有焦味传出。System logbook中查故障代码为“EX 2 82 3”。故障分析　通过查故障代码知道是灯丝电流过低 ,<4 .2mA(正常为 8mA)。其产生原因可能为 :(1)D2 1板中F11保险丝故障 ;(2 )D2 4灯丝控制板故障 ;(3)D2 7控制电路板故障 ;(4 )X2 19和X2 5 1插座故障。作者单位 :15 0 0 0 1哈尔滨铁路中心医院CT室故障检修　打开机架前盖 ,关闭空气控制开关 ,检查D2 1板中F11保险丝完好 ;检查D2 7控制电路板 ,未发现异常 ;检查D2 4灯丝控制板 ,找X2 19插座 ,发现X2…     

西门子DRH型CT安装过程中的罕见故障1例

1　故障现象机器通电进入 MS0 5程序 ,按 Reset键 ,听见“咔嗒”声 ,接着监视器出现错误信息 :?CN0 1 0 1 :ROTATE SPEEDERROR:Too Low。打开机架重复以上现象 ,发现电机刚一动 ,K1 0 1 2的继电器 K3、K4响两声 ,旋转立即停止。2　故障分析根据现象问题出在机架旋转部分 ,这部分电路包括 E43、E44、K1 0 1 2的 D1、D2、D3、D5、G40 37的 D1、D2、D3、D4、D1 5、D1 8、电源、继电器、电机、开关等电路。在工作正常时 ,Reset后 ,G40 37的 D2板得到信号 ,传到 D1 ,使 K3通 K4断 ;K1 0 1 2的 D5板收到信号 ,传给 E7,使 E7工…     

旋转调强放疗计划和实施技术进展

旋转调强放疗(intensity-modulated are therapy,IMAT)作为一种调强放疗(intensity-modulated radiation therapy,IMRT)技术,其特点是照射过程中机架连续旋转,多叶准直器(multileaf collimator,MLC)连续运动,通过机架多弧或单弧旋转,实现不同射野方向上的射束强度调整.多弧IMAT可以在动态旋转治疗的常规加速器上实施,单弧IMAT只能在RapidArc或容积旋转调强放疗(volumetric-modulated arctherapy,VMAT)等新型加速器上实施,机架旋转时叶片连续运动,同时能够改变剂量率或机架转速.     

9800CT机扫描测速机故障分析及更换方法

CT扫描机架是CT采集数据的重要部件,由于其运转频繁,故障发生率也较高,而机架扫描旋转电机的速度故障,不仅影响DAS系统收集数据,严重时会导致整个系统不能工作。对于GE9800CT机,当运行M级初始化程序时,AXIAL CONTROL ON信号检测,AXIAL POT反馈输入及机架供电位置确定等,均与机架旋转速度有关。只有M级初始化成功后,方能进行轴位扫描。其基本工作过程是:在AXIAL     

Delta-2060 CT机故障一例

1.故障现象:在开机时,监视器显示“ＰＢｍｉｃｒｏ(ｐｗｒｕｐ)ｌｏｇａｍｐｐｏｗｅｒｏｆｆｏｒ90ｖｏｌｔｐｏｗｅｒｏｆｆｏｒｒｏｔａｔｅｄｒｉｖｅｆａｕｌｔ”,并且听到扫描架内发出轰轰振动声。打开机盖,看到机架的旋转部分振动着向逆时针方向缓缓移动。2.故障检查与解决:根据提示,用万用表测量了对数放大电源和90Ｖ电源,它们输出都正常。但在检测旋转驱动控制器时,ＴＢ111端子为低电平。ＴＢ111端子代表启动/截止信号(ｅｎａｂｌｅ/ｄｉｓａｂｌｅ),如果为低电平,则表示外部联锁开关满足机架旋转的条件;若为高电平,则表示外部联锁…     

3MM952激光相机机械传动故障检修

故障现象胶片经排版后在传片过程中无法传动，相机发出“嗒、嗒、嗒”的连续爆响，故障提示灯显示“30”，并不停闪烁。     

GE LightSpeed 16螺旋 CT 机故障维修

1 故障现象
　　正常开机后,CT 扫描机架上的显示面板没有任何显示。
　　观察故障表面现象：发现2块扫描机架的控制面板,仅RESET 绿灯常亮,而扫描机架 GANTRY 的风扇旋转正常,输入测试115 V 也无异常。重新系统开机,扫描机架的控制面板上 RESET 绿灯出现不停闪烁,提示操作台和扫描机架间正在建立通讯,待开机完成后 RESET 绿灯即处于常亮状态。     

神经外科手术病人丙泊酚靶控输注复合舒芬太尼和芬太尼麻醉的效果比较

目的评价神经外科手术病人丙泊酚靶控输注复合舒芬太尼或芬太尼麻醉的效果。方法择期神经外科手术病人40例,ASA I级或II级,随机分为两组:丙泊酚-舒芬太尼组(S组)和丙泊酚-芬太尼组(F组),每组20例。术中S组持续输注舒芬太尼0.02~0.05μg/(kg.m in),F组单次静脉注射芬太尼,每次1~2μg/kg。分别于麻醉诱导前(T0,基础值)、气管插管前即刻(T1)、气管插管后即刻(T2)、上头架后即刻(T3)、切皮后即刻(T4)、颅内占位切除约一半时(T5)、关颅头皮皮下缝合开始后即刻(T6)、拔除气管导管即刻(T7)和拔除气管导管后30m in(T8)各时间点记录血流动力学指标。术后恢复阶段观察病人的自主呼吸恢复时间、轻唤睁眼时间、拔管时间,并于拔管后5 m in记录病人的警觉/镇静评分(OAA/S评分)。结果F组在T2、T3、T6时MAP高于S组(P<0.05);S组在T3、T6时的HR低于F组(P<0.05);F组的自主呼吸恢复时间、轻唤睁眼时间、拔管时间较S组延长(P<0.05);F组拔管后5 m in OAA/S评分低于S组(P<0.05)。两组间术中、术后并发症发生率比较差异无统计学意义(P>0.05)。结论与芬太尼相比较,在神经外科手术时联合应用丙泊酚和舒芬太尼进行全凭静脉麻醉(TIVA),能提供更为稳定的血流动力学,病人术后苏醒快、苏醒质量高,麻醉可控性更好。     

西门子AR.SP型螺旋CT机故障维修

我院1994年引进德国西门子AR.SP型螺旋CT机,多次出现故障,现总结1例故障检修过程,介绍如下。故障现象近一段时间,每当机器开机球管预热要求曝光时,按下曝光键,CT机就会出现机架指示灯灭,要求RESET复位,复位后又会发生上述现象,此现象至少反复3次以上,CT机才能复位成功,恢复正常扫描工作。System-Log-book中查故障代码为《E X 2842》。故障分析通过故障代码知道是由于表格T5F中从XCE-MA到TDR-OK(TUBE DR IVE OK)之间的时间超过指定时间而引起的。故障产生原因:(1)D22逆变器,D27控制板,D28板故障;(2)表格T5F数值…     

普鲁泊福复合芬太尼用于人工流产术的疗效观察

目的　观察普鲁泊福复合不同剂量的芬太尼用于人工流产术的效果。方法　 84例人工流产患者随机分成四组 ,每组 2 1例 :P组以普鲁泊福 3 .5mg/(kg·h)速率输注 ,F1 ,F2 ,F3组则于输注普鲁泊福前 1min分别静注芬太尼 0 .2 5 μg/kg ,0 .75 μg/kg ,1.2 5 μg/kg。各组病人分别监测手术前 (S1 )、扩宫时 (S2 )、扩宫结束 (S3)、吸宫时肢动出现 (S4 )时的平均动脉压 (MAP)、心电图 (ECG)、心率 (HR)、呼吸 (RR)、脉搏、氧饱和度 (SpO2 )和普鲁泊福的首剂量、总用量、呼吸抑制发生率、术毕意识恢复时间和定向力恢复时间。结果　F3组比F2 组呼吸抑制发生率明显增多 (P <0 .0 5 ) ,F3组意识恢复时间较其他组明显延长 (P <0 .0 1) ,P组和F1 组普鲁泊福首剂量和总用量明显增多 (P <0 .0 1)。结论　普鲁泊福复合 0 .75 μg/kg的芬太尼既可加强镇痛、减少普鲁泊福用量 ,又不影响病人术后清醒     

Optimization of the system of medical service of students of Cadet Schools of the Ministry of Defense of the Russian Federation

One of the factors of the successful military career guidance Cadet schools students is preserving and promoting their health. Medical support of children and adolescents aged 10-17 years should include the full range of medical and preventive measures defined for this group. The state of providing outpatient care for pupils at the Cadet School in St. Petersburg was studied. These results show that full medical care in accordance with the standards can be based only on children's health clinics. It is important that the organization of medical support pupils cadet schools should be cooperate with civilian health care.     

带状疱疹83例误诊原因分析

带状疱疹是由水痘—带状疱疾病毒引起的皮肤科常见疾病。其主要的病理损害,一是受累神经的严重炎症性浸润,继而导致受侵犯神经节内神经细胞变性、坏死;二是皮肤的水泡。迅速抑制神经节和相应的感觉神经纤维的充血、水肿和坏死,防止粘连形成,达到迅速镇痛、改善皮损,缩短病程及防止后遗症的发生是治疗的关键。因而,尽早明确诊断,     

Estimation of accumulated dose of radiation by method of ESR-spectrometry of dental enamel of mammals

ESR-spectrometry was used to investigate radiation-induced paramagnetic centers in enamel of mammals: carnivores (polar bear and fox), ungulates (reindeer, European bison, moose), and man. Values at half the microwave power saturation of the radiation signal, P_1/2, evaluated at room temperature, was found to range from 16 to 26 mW for animals and man. A new approach to discrimination of the radiation induced signal from the total ESR spectrum of reindeer enamel is proposed. ‘Dose-response’ dependencies of enamel of different species mammals were measured within the dose range from 0.48 up to 10.08 Gy. Estimations of ‘radiosensitivity’ enamel of carnivores and ungulates showed good agreement with radiosensitivity enamel of man by ESR method.     

Analysis of the results of the international comparison of activity measurements of a solution of Fe

The results of an international comparison of activity measurements of a solution of ⁵⁵Fe organized by the BIPM in 2005 are reported and analysed. This exercise, which follows the procedures of the CIPM mutual recognition arrangement to update older comparisons, is a renewal of the comparison organized by the BIPM that took place in 1978. A EUROMET comparison was organized in 1996 specifically to compare activity measurements of a ⁵⁵Fe solution by means of liquid-scintillation techniques. Results of these three comparisons are presented and discussed in this paper.

The radionuclide solution was provided by the NPL, which also distributed the samples to the participants. The activity of the ampoules was measured by 16 laboratories using 12 methods producing 25 results. Some general considerations on uncertainty assessments pertaining to the different techniques used are drawn. The outcome of four different estimators is compared from which the presence of at least one outlier can be confirmed. Further measurements should be made to try to reduce the discrepancy between the results. To date the outcome of the present comparison does not show an improvement to that of the 1996 comparison.     

Evaluation of the results of various technics of non-surgical therapy of varicocele

A new method of non-surgical treatment of varicocele syndrome is described: it consists in sclerotherapy of spermatic vein by trans-femoral percutaneous catheterization with balloon-catheters. In 8 cases venous thrombosis has been induced by direct electric clotting. The techniques and a 6 months follow-up are discussed. It is pointed out that this procedure should be considered as the method of choice for tubular lesions and sub-fertility prophylaxis in young people and in childhood.     

延迟性脾破裂误漏诊原因分析

目的探讨延迟性脾破裂误漏诊原因和预防措施.方法回顾性分析总结12例延迟性脾破裂中的诊断和误漏诊的经验与教训.结果本组延迟性脾破裂的误漏诊5例(41.66%).对多发伤与脾破裂并存可能认识不足,外伤史轻微或伤员隐瞒外伤史,缺乏腹痛-缓解-突然再腹痛的典型病史,缺乏“对冲性脾破裂”力学分析和整体化诊断思路等为其误漏诊的主要原因.结论详细的外伤史和全面系统检查,重视腹以外多发伤掩盖腹内脏器伤及延迟性脾破裂可能.确立外伤-腹内脏器伤-脾破裂整体化诊断思路.不间断地辅以B超检查脾形态学变化和腹内有无积液,腹腔穿刺确定有无血腹、X线胸腹部检查观察左侧胸肋角和膈肌运动情况、必要时CT检查以尽早发现脾包膜下血肿,降低延迟性脾破裂误漏诊率.