同轴活检针在超声导向肾脏穿刺活组织检查中的应用

目的探讨非穿刺探头引导下同轴活检针配合导向经皮肾脏穿刺活组织检查的应用价值。方法采用彩色多普勒超声诊断仪和普通探头,对45例肾脏疾病患者进行肾脏活组织检查,将同轴活检针预置于。肾包膜处,在超声实时监控下,取出针芯,插入巴德穿刺枪进行穿刺活检。结果每次进针所获得的肾组织的长度2～15mm,平均（8．39±3．41）mm。光镜下每例所得的肾小球的数目为5～47个,平均（20．02±12．46）个,超声定位下均成功取出肾组织。2例术中出现穿刺点肾包膜下小血肿,其余均无并发症发生。结论非超声穿刺探头引导下同轴活检针穿刺肾脏,是一种简单、安全、准确的诊断方法,取材成功率高,并发症少,有利于在基层医院广泛开展。     

CT引导下经皮同轴穿刺活检术在颈部病变的临床应用

目的：探讨基层医院应用CT引导穿刺活检术在诊断颈部病变的可行性及手术方法。方法：在螺旋CT引导下分别对13例患者行穿刺活检术,分析取材的准确性及并发症的发生率。结果：13个病灶穿刺成功率100%,病变定性诊断确诊率85%（11/13）,无明显并发症发生。结论：CT引导下同轴穿刺活检术是一种简单、安全、准确的诊断方法,有条件的基层医院应该积极开展应用。     

Use of Glubran 2 acrylic glue in interventional neuroradiology

Introduction Glubran 2 is a cyanoacrylate-based synthetic glue modified by the addition of a monomer synthesized by the manufacturer. With this material it is possible to obtain the stability of endovascular embolization that is needed to treat tumours and vascular disease. Material and methods We report our 3-year experience of the use of Glubran for treating extracerebral tumours, spinal tumours, spinal arteriovenous malformations, and brain and spine dural fistulae. Glubran 2 was diluted with Lipiodol and injected in a continuous column with the flow rate monitored by seriography. The injection was stopped when retrograde flow was displayed in the afferent vessel. Results There were no periprocedural or subsequent clinical complications and the glue resulted in successful selective permanent occlusion with intralesional penetration similar to the angiographic features of microcatheterization. Conclusions The embolization procedure was technically straightforward and relatively safe. However, Glubran 2 can be difficult to use and the procedure does carry major risks for patients. Glue injection requires in-depth study of the lesion, its circulation and the collateral circulation to avoid severe complications due to inappropriate use. This paper was awarded the Lucien Appel Prize ESNR 2003.     

在体和离体兔组织射频介电特性的测量

作者制作了同轴线传感器，根据同轴传输线反射原理，建立起计算机控制的生物组织介电测量系统，在６０～３０００ＭＨｚ频率范围对兔器官组织进行了有效在体和离体介电测量，５０只兔器官组织的统计分析结果表明，不同兔器官组织之间介电参数的最大差异可达３０．４％，在体和离体测量得出介电常数之间未见显著性差异，但电导率有频率依赖性的显著差异，因此将人体的离体介电参数延用到实际活体场合时，必须慎重。     

Studies on ion-exchange membranes. Part 1. Effect of humidity on the conductivity of Nafion®

Cation exchange membranes, such as Nafion® 117, are widely used in fuel cells and electrolyzers. The conductivity and hence the performance of these membranes depends strongly on the amount of free water contained within the membrane.The present paper uses the coaxial probe method, developed by the authors, to examine the average and local conductance of Nafion® 117 under different degrees of humidification. The ion transport characteristics of me membrane are also studied under conditions of differential humidification where opposite sides of the membrane are held at different humidity values. The results offer a new approach to membrane characterization and further insight into the role of water content in the transport of H⁺ ions across the membrane in fuel cells.     

同轴导管法治疗输卵管阻塞不孕症的临床应用

目的：探讨安全而有效的输卵管再通的治疗方法。材料与方法：11例输卵管阻塞的患者,用三根同轴导管行选择性输卵管造影,如果加压造影后阻塞仍然存在,则直接送入导丝行输卵管再通术。在加压造影和导管的作用下,大多数病人均可复通。结果：20条输卵管中经选择性造影或再通术均获得再通,有4例宫内妊娠,无宫外孕。结论：输卵管近端阻塞的患者应选择性输卵管造影或输卵管再通术,两种方法对输卵管阻塞的治疗是安全有效的。     

A triple coaxial catheter system for subselective visceral artery catheterization and embolization: Preliminary clinical experience

We developed a triple coaxial catheter system (TCCS) which consists of a 6.1 Fr outer, a 4.1 Fr intermediate, and a 3.0 Fr inner catheter, all coated with a lubricant. The TCCS was used in seven patients with hepatic tumors, after several attempts to access a targeted vessel with conventional catheters and guidewires failed to reach the targeted vessel. No complications were encountered with the use of this system. TCCS may be a useful device for selective abdominal arteriography.     

CT引导下经皮同轴穿刺活检术在颈部病变的临床应用

目的：探讨基层医院应用CT引导穿刺活检术在诊断颈部病变的可行性及手术方法。方法：在螺旋CT引导下分别对13例患者行穿刺活检术,分析取材的准确性及并发症的发生率。结果：13个病灶穿刺成功率100%,病变定性诊断确诊率85%（11/13）,无明显并发症发生。结论：CT引导下同轴穿刺活检术是一种简单、安全、准确的诊断方法,有条件的基层医院应该积极开展应用。     

高纯锗γ谱仪对碘采集装置中131I的探测效率研究

校准气载放射性碘监测设备参考响应的测量标准,是以放射性碘采集装置为源载体的¹³¹I参考源,其量值采用γ能谱法测定。γ谱仪对采集装置中¹³¹I的探测效率是¹³¹I参考源准确定值的关键参数。本研究针对测量用的相对效率为53%的N型同轴高纯锗γ谱仪,刻度了其对采集装置中¹³¹I的探测效率。结果表明,该γ谱仪对玻璃纤维滤纸与活性炭滤纸表面¹³¹I的探测效率为7.68%,对浸渍活性炭滤盒不同深度处探测效率变化范围为(3.14~7.68)%,当分布参数在(0.09~0.34) mm^-1之间变化时,采用该高纯锗γ谱仪测量,浸渍活性炭滤盒的η_count·η_collection值在(4.90~6.82)%间变化。     

Embolic control of lumbar artery hemorrhage complicating percutaneous renal biopsy with a 3-F coaxial catheter system: Case report

A case is presented in which massive retroperitoneal hemorrhage from the left first lumbar artery complicating a percutaneous renal biopsy was successfully controlled by superselective embolization with microcoils. An anterior radiculomedullary artery (artery of Adamkiewicz) orginated from the lumbar artery. To minimize the risk of ischemic damage to the spinal cord from embolization, the extravasating branch of the lumbar artery had to be superselectively catheterized using a 3-F coaxial catheter system. Computed tomography (CT) scan localized the hematoma within the left posterior pararenal space in the retroperitoneal space.