微机接口技术实验装置的设计

从微机原理实验室建设实际出发,设计了一款微机接口技术实验装置,该装置采用基于PCI总线的外置实验箱形式。讨论了应用背景和设计思想,给出了相关硬件设计方案,针对实验内容,提出了不同层次的实验要求。     

Elevated high sensitive C-reactive protein and apelin levels after percutaneous coronary intervention and drug-eluting stent implantation

Objective:Percutaneous coronary intervention(PCI) triggers an acute inflammatory response,while sirolimus is known to have anti-inflammatory properties;the inflammatory system response to PCI after sirolimus-eluting stent placement remains unclear.The purpose of this study is to determine the changes in high sensitive C-reactive protein(hs-CRP) and apelin after PCI procedure and drug-eluting stent implantation in patients with and without reduced left ventricular systolic function.Methods:Forty-eight consecutive patients undergoing PCI at the Beijing Anzhen Hospital between July and September 2006 were recruited.Sirolimus-eluting stents were employed in all patients.Blood samples were drawn immediately before and 24 h after the procedure.Plasma hs-CRP and apelin levels were determined by enzyme immunoassay.Results:Paired t-test revealed a significant increase in both hs-CRP and apelin post-procedure(P=0.006 and P0.0001,respectively).Patients with reduced left ventricular ejection fraction(LVEF) had significantly lower baseline apelin levels compared to those with normal ventricular function [(46.8±10.8) vs.(72.0±8.4) pg/ml,P0.001].However,apelin increased to a level similar to the level of those with normal left ventricular systolic function 24 h after the PCI procedure [(86.7±11.6) vs.(85.1±6.1) pg/ml,P=0.72].Conclusions:hs-CRP and apelin levels increased after PCI and sirolimus-eluting stent implantation.Patients with impaired left ventricular systolic function had significantly lower baseline apelin levels,which increased significantly after PCI.     

VxWorks下PCI视频采集设备的驱动设计

视频采集系统在数据传输的实时性、高速性和中断响应上有着较高的要求.为此,设计了一种在x86平台下利用实时操作系统VxWorks,采用PCI总线的视频数据采集系统.示范了采用BT878A芯片的PCI采集卡地址映射和中断资源分配过程,及其RISC指令执行流程.     

基于CompactPCI的系统管理板热插拔设计

本文主要介绍了基于CompactPCI总线的热插拔系统管理板的硬件结构，并对CompactPCI总线接口的硬件和热插拔设计进行了讨论，提出了电气措施和设计要点。     

基于CompactPCI的视频接口卡热插拔设计

本文主要介绍了基于CompactPCI总线的热插拔视频卡的硬件结构，并对CompactPCI总线接口的硬件和热插拔设计进行了讨论，提出了电气措施和设计要点。     

一种收发可定义的PCI串并接口板设计

本系统在传统的串并接口通讯板卡的基础上进行改进,使得串并接口的收发可定义,并将其应用到PCI串并接口板的开发中.结果表明,由于从硬件、软件上实现了串并口的收发可定义,从而使该种PCI板卡的使用非常便捷,大大提高了检测效率.     

浅谈PCI与PCI Express技术

PCI、PCI Express都是一种总线技术标准.其中,PCI替代了ISA,PCI Express替代了PCI,每一次的替代,每一次的推陈出新,既有技术的进步,更有利益的驱动和竞争.今天,笔者就时下流行的PCI Express和与之相关的PCI技术标准向大家作一介绍,目的在于普及更新的、流行的、前沿的技术知识.     

Renal insufficiency is an independent predictor of in-hospital mortality for patients with acute myocardial infarction receiving primary percutaneous coronary intervention

Objective:To investigate the relationship between renal function and clinical outcomes among patients with acute ST-segment elevation myocardial infarction (ASTEMI), who were treated with emergency percutaneous coronary intervention (PCI). Methods: 420 patients hospitalized in Peking University First Hospital, diagnosed with ASTEMI treated with emergency (PCI) from January 2001 to June 2011 were enrolled in this study. Estimated glomerular filtration rate (eGFR) was used as a measure of renal function. We compared the clinical parameters and outcomes between ASTEMI patients combined renal insufficiency and the patients with normal renal function. Results:There was a significant increase in the concentrations of fibrinogen and D-Dimer (P<0.05) and a much higher morbidity of diabetes mellitus in the group of patients with chronic kidney disease (CKD; eGFR<60 ml/(min·1.73 m2)) (P<0.01). CKD (eGFR<60 ml/(min·1.73 m2)) was an independent predictor of in-hospital mortality for patients hospitalized with ASTEMI receiving PCI therapy rapidly (P=0.032, odds ratio (OR) 4.159, 95% confidence interval (CI) 1.127-15.346). Conclusions:Renal insufficiency is an independent predictor of in-hospital mortality for patients hospitalized with ASTEMI treated with primary PCI.     

基于虚拟仪器的实验教学平台设计

实验教学对于提高学生的实践动手能力非常重要,基于虚拟仪器的实验教学平台能够降低实验成本并提高学生学习的积极性。采用灵活性较好的 PCI 插卡式数据采集卡构成实验教学平台的硬件系统,能够实现数据信号发生等功能,同时能够实现网上远程教学,实现资源优化。     

经桡动脉途径行冠脉介入300例临床分析

目的:探讨经桡动脉途径进行冠脉介入的可行性和安全性.方法:采用回顾性调查的方法对本院2002.9～2005.3月300例经桡动脉途径完成冠脉介入临床资料进行统计分析.结果:行冠状动脉造影术182例,行冠脉介入治疗118例,桡动脉穿刺成功率为99.3%.结论:经桡动脉途径进行冠脉介入是可行的和安全的,并发症少,痛苦少.