彩色多普勒超声诊断先天性膈疝的产前分析

目的：探讨先天性膈疝的产前超声表现。材料和方法：回顾性分析6例先天性膈疝胎儿声像图表现特征,并与病理结果相对照。结果：左侧膈疝5例,右侧膈疝1例,其中2例伴有其它复杂畸形。超声显示胎心、纵隔受压移位,心轴偏移明显。疝入器官见有胃泡、肠管、肝脏,胎儿呼吸样运动可致疝入器官运动幅度增加。结论：先天性膈疝的特征性声像图表现,可作为诊断的重要依据。     

近视性屈光参差的功能性磁共振成像研究

目的利用血氧水平依赖性功能性磁共振成像(BOLD-fMR I)技术,探索人类近视性屈光参差是否对大脑皮层功能和结构造成影响。方法采用无磁MR I专用眼镜纠正屈光不正,以1.5T磁共振成像系统采集8例近视性屈光参差者枕叶视皮层兴趣区BOLD-fMR I数据,比较双眼皮层激活部位及范围的不同,及视力较差眼屈光纠正前后皮层激活情况的变化,分析其改变特点及机制。结果矫正屈光基础上,近视性屈光参差者双眼激活范围没有明显差异(P>0.05);视力较差眼屈光矫正前后皮层激活范围有明显差异(P<0.05)。结论人类近视性屈光参差可能没有发生明显的皮层功能损害及优势眼的转移;配镜可明显提高视力较差眼的皮层激活,应尽早配镜或手术矫正。     

CT导向下经皮射频消融术治疗肾上腺恶性肿瘤

目的对29例肾上腺肿瘤患者行射频消融（RFA）治疗，研究其近期局部治疗效果、不良反应和副作用。方法肾上腺肿瘤患者共29例，病灶总数31个，其中直径≤2．0cm的病灶共5个，2．1-4．0cm者18个，4．1-6．0cm者5个，≥6．1cm者3个，经RFA治疗1个月后行螺旋CT双期增强扫描评价肿瘤治疗效果。结果上述病灶经消融治疗后达到完全坏死者分别为5个、18个、3个、2个。患者无严重并发症出现。结论RFA治疗安全可靠，副作用小，是治疗肾上腺恶性肿瘤的有效方法之一。     

Effect of the free radical scavenger MCI-186 on spinal cord reperfusion after transient ischemia in the rabbit

Objective: Paraplegia remains a serious complication of aortic operations. The production of free radicals during reperfusion after transient ischemia is believed to induce secondary spinal neuronal injury, resulting in paraplegia. The aim of the present study was to clarify the protective effect and method of administration of antioxidants on the neurological and histological outcome in the animal model for reperfusion injury after transient spinal cord ischemia. Methods: New Zealand white rabbits underwent surgical exposure of the abdominal aorta that was clamped for 15 minutes to achieve spinal cord ischemia. Group A animals received two 10 mg/kg doses of 3-methyl-l-phenyl-2-pyrazolin-5-one (MCI-186) at the time of release of the aortic clamp and 30 minutes later. In group B, MCI-186, 5 mg/kg, was given three times, at the time of aorta clamp release, 30 minutes and 12 hours later. In group C (control group), one dose of vehicle was administered. Neurological status was assessed using modified Tarlov’s score until 168 hours after operation. Spinal cord sections were examined microscopically to determine the extent of ischemic neuronal damage. Results: Groups A and B animals had better neurological function than group C (p(0.001). In contrast, group C animals exhibited paraplegia or paraparesis with marked neuronal necrosis. The number of surviving neurons within examined sections of the spinal cord was significantly greater in group B than in group C (p(0.001). Conclusion: In a 15-minute ischemia-reperfusion model using rabbits, systemic repetitious administration of MCI-186, a free radical scavenger, was found to have a protective effect on the spinal cord neurons both neurologically and histologically. We postulate that the drug minimizes the delayed neuronal cell death for reperfusion injury after transient ischemia by reducing the free radical molecules. Moreover, it was thought that we could protect delayed neuronal cell death more effectively by administering MCI-18612 hours later.     

乳腺癌前哨淋巴结活检放射安全性研究

目的 探讨乳腺癌前哨淋巴结活检术（sentinel lymph node biopsy,SLNB）的放射安全性.方法 采用热释光剂量计（thermoluminescent dosimeters,TLD）检测在SLNB过程中患者乳房注射部位、胸腺、盆腔性腺及医务人员优势手食指、胸腺、盆腔性腺、眼晶体接受的放射线剂量.2006年10月至2007年7月连续检测行乳腺单纯切除/保留乳房＋SLNB的乳腺癌患者40例.结果 患者乳房注射部位的吸收剂量最大（5.946&#177;5.023）mSv,显著高于胸腺及盆腔的吸收剂量（均P=0.000）.主刀医师、第一助手、器械护士各部位核素吸收剂量差异无统计学意义（均P＞0.05）,远远低于我国卫生部确定的放射卫生防护基本标准.依据该标准,术者每年完成约1000台SLNB手术在放射安全性方面是安全的.结论 核素法SLNB对患者和医务人员是安全的,不需要进行防护.     

柯里拉京对人胰腺癌Bxpc-3细胞抑制作用的初步研究

目的 观察柯里拉京(Corilagin)对人胰腺癌Bxpc-3细胞的抑制作用。方法 采用MTT法和流式细胞仪技术。结果 Corilagin显著抑制了Bxpc-3细胞的增殖，且呈时间-剂量依赖性；流式细胞仪分析结果显示，Corilagin主要作用于细胞周期的S期，同时也作用于G2-M期。并且有凋亡峰出现。结论 Corilagin可有效抑制Bxpc-3细胞增殖，阻滞细胞于S期和诱导凋亡可能是其作用机制之一。