肢体阻抗生物反馈仪的研制

本文介绍一种新型肢体阻抗生物反馈仪。该仪器应用四电极法从人体检测出肢体阻抗血流图，应用ＭＣＳ－５１单片机对每一个心动周期实时计算出变动阻抗峰峰值ΔＺｐｐ和心动周期时间Ｔ。用ΔＺｐｐ和Ｔ控制一组视觉和听觉反馈信号。     

血压知识知多少(三)

什么是脉压差 心脏有规律地进行收缩和舒张,每收缩与舒张交替进行一次,称为一个心动周期。在每一个心动周期中产生收缩压和舒张压,收缩压与舒张压之间的差值称为脉压差。比如收缩压为21.3kpa(160毫米汞柱),舒张压为12.7kpa(95毫米汞柱),脉压差则为21.3-     

3T MRI基础与临床 第九讲 心脏及乳腺成像

49心脏形态成像搏动器官和组织的常规自旋回波系列（SE）和快速自旋回波序列（FSE）成像,例如心脏的成像,在正常的心动周期内,由于心脏组织空间位置的快速变化,在标准形式下获得的心脏成像就会表现出运动伪影。但是，由于正常的心动周期是连续性的，并且包含较短的不动期和舒张期，只有在这些时期内才能更改标准序列来获得信息，该过程称为心脏触发，在该过程中，在一个层面的k空间被填满之前，涉及在每一个心脏舒张期获取一条带有k空间线的回波（SE），     

可选择心动间期电子听诊器的研制

本文介绍一种新型电子听诊器。利用心电信号的 ＱＲＳ波控制电子模拟开关，有选择地传导或删除心动周期中某段时间的心音信号，能清晰地区分和辨认心脏听诊内容，有助于临床教学。并介绍有关线路的设计。     

扩张型心肌病自主神经功能及昼夜变化

目的 研究扩张型心肌病(DCM)自主神经功能及昼夜变化。方法 采用临床病例对照,DCM组31例与正常人31例根据性别、年龄配对,运用动态心电图和计算机数据处理技术,结合心率变异(HRV)长时程时域分析与昼夜6个时点频域分析,观察平均心动周期、24小时全部正常心动周期的标准差(SDNN)、低频(LF)与高频(HF)功率、LF/HF比值等指标的变化。结果 (1)DCM患者24小时平均心动周期较对照组短,昼夜平均心动周期差减小(P<0.01);DCM组SDNN为93.78±45.06ms,正常人149.72±31.32ms,差异有显著意义(P<0.01)。(2)DCM组患者各时点的LF、HF均较对照组降低。对照组白天LF明显高于HF,DCM组LF稍高于HF,但LF/HF值升高;对照组夜间HF高于LF,但DCM组LF高于HF,LF/HF值升高。结论 DCM患者自主神经功能受损,交感神经及迷走神经活性降低,昼夜节律异常,交感-迷走神经功能平衡失调。夜间交感神经功能相对亢进,可能是夜间恶性心律失常及猝死的原因。     

食道心房调搏基层医院应用体会

心脏的基本活动形式包括电活动和机械活动,每个心动周期中都是心脏的电活动在前,机械活动在后,任何电活动的障碍,急剧紊乱     

共用通道心阻抗／导纳图微机检测系统

共用通道心阻抗／导纳图微机检测系统泰安市医学仪器研究所李兰玉，杨继鹏，陈兆涛心阻抗图（ＩｍｐｅｄａｃｅＣａｒｄｉｏｇｒａｐｈ，ＩＣＧ）是一种利用心动周期引起的胸部阻抗的微小瞬时变化经放大记录而得到的曲线。自１９６６年Ｋｕｂｉｃｅｋ利用其测定排血量以来...     

智能化血流信号检测系统的开发研究

智能化血流信号检测系统的开发研究首都医科大学生物医学工程系郝冬梅一．前言阻抗血流图法是一种常规的无掼检测血流的方法，它可以反映在心动周期内血流容积的变化，客观地评价机体被测部位搏动性血液供应的强度，血管的紧张度及其管壁的状态等，其基本原理是向待测部位...     

仿真心血管系统展示平台的设计

目的:构建仿真心血管系统平台,在对用户进行心脏病学知识普及的同时,针对脉搏波检测软件不够直观的问题,构建与脉搏波实时匹配的心动周期模型进行展示,以此丰富脉搏波检测的展示信息,给用户更为主观的体验。方法:基于Flash软件开发平台,以三维模型作为媒介,实现建立心动周期模型。同时对常见心脏病例进行模拟展示,用户通过鼠标点击操作,选择相关问题,观看相应动画,实现人机操作,为医学研究和临床诊断提供参考。结果:平台集知识教学、练习提高、动画实时互动检测等功能于一体,让用户通过点击鼠标观看动画及相关资料,达到普及知识教育效果;同时使用者可通过外部采集脉搏波或心率与平台通讯,对实时心动周期进行模拟达到科研仿真效果。结论:仿真心血管系统展示平台是目前市场上不多见的,基于虚拟现实技术的软件。该软件在训练、教学等方面具有一定应用价值。     

生理学学习辅导（五）

生理学学习辅导（五）长春医学高等专科学校（１３００３１）徐琳第五章循环系统的功能重点内容１．心肌生理特性：心脏正常起搏点、心肌特殊兴奋传导系统及各部传导速度不同的生理意义、心脏兴奋过程兴奋性的周期变化。２．心动周期的概念、心脏射血与充盈过程；心音的形...     

口腔金属材料磁共振成像伪影的实验研究

研究3种口腔常用金属材料在l3种不同头颈部扫描序列中的伪影。测量伪影大小，并进行统计学分析。得出3种金属在相同序列成像中，纯钛伪影最小，硬质钴铬合金伪影最大；相同金属材料，6种自旋回波及快速自旋回波序列产生伪影最小，3种梯度回波序列产生伪影较大，4种平面回波序列伪影最大且使图像变形。口腔金属材料产生伪影与材料类型及成像技术密切相关，通过合理选择金属材料及成像技术得到最佳MR成像。     

L’actualité des rickettsioses

Rickettsiae are strictly intracellular bacteria belonging to the Rickettsiaceae family. They are transmitted by various arthropods species, which are either vectors or reservoirs for the bacteria. The specific association between Rickettsieae and the vector are extensively studied, moreover Rickettsieae associated diseases are part of a continuously evolving field. Nevertheless, some rickettsiosis, such as epidemic typhus, have been described since the 16th century. Emerging diseases related to these bacteria are being investigated as well as new species, the implication of which is not always clear in human pathology when they are discovered. Some of these diseases are benign, others may be potentially fatal. Clinicians must therefore be aware of them. These issues are reviewed.     

新疆阿拉山口口岸2012年入境集装箱空箱卫生状况调查

目的对阿拉山口口岸2012年入境1514个需进行卫生处理集装箱空箱卫生状况和携带微生物情况进行调查分析,为加强入境集装箱空箱卫生检疫及卫生处理工作提供依据。方法对箱内携带垃圾进行分类分析,随机抽取集装箱,对其箱内表面采样,参考国家有关标准,采用显色培养基和生化培养试剂盒做微生物培养、鉴定菌种。结果处理集装箱空箱中,检查结果如下：携带动物尸体集装箱3个;携带动植物残留物集装箱101个;携带生活垃圾集装箱1373个;携带人类或动物传染病病原体集装箱48个;携带病媒生物集装箱37个。微生物检测情况如下：随机抽取处理集装箱空箱采集412份样品,检出金黄色葡萄球菌225株;沙门氏茵20株;大肠埃希氏菌61株;蜡样芽孢杆菌199株;链球菌31株等病原微生物。结论入境集装箱空箱携带垃圾、病原微生物为国际间疫病的传播提供了便利通道,给各国的卫生安全及人体健康带来威胁。应加强阿拉山口口岸入境集装箱空箱的卫生检疫及卫生处理工作。     

骨髓增生异常综合征的诊断分类和治疗

WHO将骨髓增生异常综合征分为六种类型,除保留了FAB分类中的RA、RARS、RAEB三型外,CMML、RAEB-T则不再作为MDS的类型,而分别归于MDS/MPS和AML中,增加了5q-综合征,RCMD、MDS-U.免疫抑制剂、造血干细胞移植为主要治疗方法.     

Organizational characteristics associated with hospital CEO turnover

Using a Probit regression model, this study examines organizational factors contributing to hospital chief executive officer (CEO) turnover. The study concludes that some organizational environments are more conducive to turnover. Hospitals that are smaller, are on the West Coast, are investor owned, are church related, offer many services, have high service usage, and larger hospitals with female CEOs are more likely to experience turnover.     

我国省级区域医疗卫生与经济协调发展的时空演变研究

目的:探索我国省级区域医疗卫生与经济协调发展状况及其时空演变,为医疗卫生与经济增长关系研究提供新思路。方法:借鉴物理学概念及有关成果,构建协调发展评价模型,对我国省级区域医疗卫生与经济协调发展状况进行分析,并运用探索性空间数据分析方法分析其时空演变。结果:我国省级区域医疗卫生与经济协调发展取得了一定进展,各省级区域呈现出"中间重(过渡类较多)、两头轻(协调类、失衡类较少)"的状态,和"东高西低"的阶梯特征;在空间上集聚,高值集聚和低值集聚均比较明显,热点和次热点区域主要集中在东、中部地区,而冷点和次冷点区域主要集中在西部地区。结论:协调发展评价模型适用于区域医疗卫生与经济协调发展研究,为医疗卫生与经济增长协调关系研究提供了新基础。     

HIM jobs of tomorrow

Tomorrow's HIM jobs are arriving today, as technology transforms how we capture, manage, and use information. Following are 11 jobs that represent evolving roles and emerging opportunities. Some are familiar roles with a new twist. Others are new roles, and some are possibilities. All are opportunities for HIM professionals to use their core competencies in new ways and move into positions that have not been thought of as career tracks for HIM.     

Understanding leukotrienes

The leukotrienes of white cells are powerful pharmacological mediators that are implicated in many immunological reactions. The most powerful effects (bronchoconstriction and mucus secretion) are seen in asthma. The circulatory effects are local, except perhaps in endotoxin shock. Apart from corticosteroids, there are as yet no inhibitors in use in therapeutics.     

新生儿低血糖症91例临床分析

目的：探讨新生儿低血糖的高危因素及临床特点,为临床诊治及预防提供依据。方法：对收治的1254例新生儿进行血糖监测,对91例低血糖症患儿的临床资料进行回顾性分析。结果：①91例低血糖症中足月儿38例,早产儿53例,小于胎龄儿17例,窒息或宫内窘迫37例,感染26例,母患糖尿病或妊高症8例,喂养不当6例。②有症状22例（24.2%）,无症状69例（75.8%）,血糖越低,越容易出现临床症状。结论：对各种低血糖高危因素的新生儿均应常规监测血糖,早期诊断,及时治疗,可降低新生儿低血糖症及其脑损伤的发生。     

Tuberculosis in Peru: identification,treatment

The incidence of tuberculosis in Peru is estimated at 171.3 per 100,000, but regional differentials are significant. The government has administered a decentralized tuberculosis control program for the past several years. Diagnosis, follow-up, and treatment are free. Vaccinations are provided for newborns and at the age of six. Health promoters at the health posts are responsible for screening individuals with coughs lasting longer than two weeks. Sputum samples are analyzed, with the test repeated as necessary. Chest X-rays and tuberculin tests are sometimes useful for diagnosis of tuberculosis, but are difficult to use in many areas of Peru. Cases are treated with a combination of four drugs for the first two months, after which two of the drugs are continued for another four months. The protocol is for most patients regardless of whether the tuberculosis is pulmonary or extrapulmonary. A second and more difficult protocol is used for patients with positive sputum tests after six months of treatment. Hospitalization is reserved for very serious forms of tuberculosis or for complications. Patients receive their medications daily at the health post in the first treatment phase and twice weekly in the second. Tolerance has been good and no routine laboratory tests are performed. Possible side effects are diagnosed clinically. Chemoprophylaxis with isoniazide is provided for children under five years of age who are in contact with tuberculosis carriers. Educational talks are given to patients and their families to impress upon them the importance of proper treatment and follow-up.