三导脉搏波传感装置

本文讨论了一种脉搏波传感装置。借鉴袖带式血压计拾取压力波的方法。脉的搏动使气路中压力改变以拾取脉搏波,并通过改变腕带压力模拟中医脉诊的浮曲、中曲、沉曲等手法,为进一步仪器分析创造条件。     

干线公路与大型城市结点的系统衔接模式

在分析干线公路与大型城市结点的传统衔接模式及其存在问题的基础上,研究提出了干线公路与大型城市结点的系统衔接模式,即将城市结点"高快路"系统作为干线公路系统和内部道路系统之间的衔接转换界面,通过"高快路"系统集中完成过境交通、出入境交通的引导、转换和疏散作业,提升城市结点衔接交通的整体运行效率。     

川崎病冠状动脉病变的超声诊断分析

目的了解川崎病急性期冠状动脉病变的发展过程,探讨急性期动态超声心动图检查的价值。方法以20例健康儿童的超声监测值为参照,探讨5例川崎病儿的超声检查结果。结果健康组左主干及右冠脉显示率为100%,病变组共检出冠脉病变3例,其中二尖瓣返流2例,心包积液1例。冠脉病变最早发生在起病第5天,第10～20天为高峰,20～30d扩张冠脉回缩。结论川崎病急性期一过性冠脉扩张较普遍,超声心动图用于诊断和随访川崎病冠状动脉病变具有方便、迅速直观优点,值得临床广泛使用。     

生物型双极人工股骨头置换治疗高龄股骨颈骨折的疗效观察

目的探讨应用双极人工股骨头置换治疗老年人股骨颈骨折的疗效。方法回顾性分析1999年3月至2007年7月应用双极人工股骨头置换治疗16例老年股骨颈骨折患者的临床资料。按Garden分型:Ⅱ型1例,Ⅲ型10例,Ⅳ型5例。结果平均手术时间为75min,术中平均出血量为200mL。16例患者均获随访,随访时间l5～36个月,平均22个月;按Harris髋关节功能评分标准:优12例,良2例,可1例,差1例。结论双极人工股骨头置换术是治疗高龄老年股骨颈骨折的良好方法。     

基于病例CT图像的健康股骨头建模研究

以还原病例健康时的股骨头形状为目的,提出了一种基于病例CT扫描图像的原始股骨头仿真建模方法。方法利用自动分割法提取CT扫描序列断层图像中的髋臼轮廓,使用辐条式采样法得到髋臼凹面的空间坐标点集,在剔除坐标点集中的误差采样点后,采用闭合形式解的最小二乘法拟合健康的股骨头球面模型。将上述方法应用于具体实例证实,仿真采用健康股骨头模型效果良好,可以为医学临床手术提供精确定位的理论模型,以及为人工假体的制造提供实践方法。     

体外心脏震波产生和触发系统的设计

本文主要研究体外震波治疗冠心病系统的震波源换能器及触发电路系统的结构与设计。震波源换能器主要由圆柱型电感线圈、金属膜及反射杯组成,实现冲击波的产生与聚焦。触发电路系统主要包括高压升压模块、升压控制模块、储能电容阵列、高压开关模块、充电计数模块和混合信号处理模块。经实验测量,触发系统可输出频率、幅值稳定的高压脉冲,安全可靠;高压脉冲接入震波换能器实现电能经电磁方式转换为机械能,发射低能量、窄脉宽、高压强的冲击波。     

计算机医用图象处理与识别──冠状动脉造影图象质量的改善以及血管直径的测试──

本文从计算机医用图象处理和识别的概念出发，通过以Ｘ射线法拍摄的冠状动脉造影图象，记叙了改善图象质量，测量血管直径，提取血管方法；解析了用空间频谱来改善图象质量；评价了在各种条件下血管直径的测试方法。同时还表明了用单纯的微分方法，适宜进行平均信息量滤波器的过程。     

“C”臂引导下经皮空心加压钛合金螺钉治疗股骨颈骨折疗效分析

目的分析在"C"臂引导下经皮空心加压钛合金螺钉治疗股骨颈骨折疗效。方法回顾性分析1995年6月-2006年6月,对130例股骨颈骨折患者在"C"型臂X线机透视下,经皮空心加压钛合金螺钉治疗效果。结果130例患者术后随访6个月至2年,平均11个月。其中优76例,良42例,优良高达率90.8%。且术后均未出现感染、断钉。结论经皮空心加压钛合金螺钉内固定治疗股骨颈骨折,手术创伤小,疗效可靠,值得临床推广使用。     

Lizard Epidermal Gland Secretions I: Chemical Characterization of the Femoral Gland Secretion of the Sungazer, <Emphasis Type="Italic">Cordylus giganteus</Emphasis>

The giant girdled lizard or sungazer, Cordylus giganteus, is endemic to South Africa. It has been suggested that in this species, as in other lizard species, epidermal glands in the femoral, pre-cloacal regions, and cloacal glands are the main sources of semiochemicals and that these secretions could play an important role at different levels of the social biology of the animals. To gain a better understanding of the nature of the femoral gland secretions of the sungazer, characterization of the constituents of the secretions was carried out. By using GC-MS analysis, in conjunction with auxiliary techniques, such as solventless sample introduction and trimethylsilyl derivatization, 53 relatively involatile compounds, including carboxylic acids, alcohols, ketones, esters, and steroids, were identified in the secretions of both sexes. The study showed that the secretions of male and female sungazers contain only semi-volatile chemicals.     

Estimation of femoral neck bone mineral density by ultrasound scanning: Preliminary results and feasibility

Aim of this paper was to assess the diagnostic accuracy of a novel ultrasound (US) approach for femoral neck densitometry. A total of 173 female patients (56–75 years) were recruited and all of them underwent a dual X-ray absorptiometry (DXA) of the proximal femur and an US scan of the same anatomical district. Acquired US data were analysed through a novel algorithm that performed a series of spectral and statistical analyses in order to calculate bone mineral density employing an innovative method. Diagnostic accuracy of US investigations was quantitatively assessed through a direct comparison with DXA results. The average diagnostic agreement resulted pretty good (85.55%), with a maximum (88.00%) in correspondence of the youngest investigated patients (56–60 y). Overall, diagnostic accuracy showed only minimal variations with patient age, indicating that the proposed approach has the potential to be effectively employable for osteoporosis diagnosis in the whole considered age interval.