基于相关分析的多维脉搏信号获取

传统的脉搏传感器无法实现真正的多点脉搏信号检测。为获取全面客观的脉搏触觉信息，本研究应用新型的脉搏图像化检测装置采集桡动脉脉搏搏动的图像，提出利用相关分析检测脉搏信号的方法，并通过实验证明了该方法的可行性。研究结果表明，在应用脉搏图像化检测装置的基础上，采用相关分析和滑动图像窗口可获取切脉皮肤表面空间多维脉搏信号，为脉搏触觉信息获取和脉诊客观化研究提供了新的思路和方法。     

脑外伤血肿膨胀与颅内压增高的有限元模拟分析

利用具有高度解剖学细节的GHBMC有限元头部模型,建立符合患者头部在受到创伤后出现脑血肿的占位效应,并提出一种采用气体分子动力学颗粒法模拟颅脑血肿导致颅内压变化的新思路。通过医学图像软件Mimics得到患者头部血肿几何模型与病变位置,调整已验证的GHBMC成人头部有限元模型,使其符合实际患者头部病变的几何特征,之后采用气体分子动力学颗粒法模拟脑血肿引起的颅内压变化。两组仿真中颅脑侧脑室偏移量分别为46 和56 mm,脑中线偏移量分别为43和41 mm,颅内压数值分别稳定在（2 680±20）和（2 618±18）Pa。实际患者颅脑侧脑室偏移量分别为48和49 mm,脑中线偏移量分别为37和3 9 mm,颅内压数值分别为2 800和2 666 Pa。仿真数据与实际数据基本吻合,表明采用气体分子动力学颗粒法来模拟分析血肿膨胀与颅内压增高的方法在理论上可行,为进一步临床应用提供理论依据。     

肥胖儿童血压及其与X线心脏大小的关系

目的：探讨不同判定标准下3～7岁单纯肥胖儿童高血压发生率,以及血压与心脏大小的相关性。方法：体质测量、血压测量、X线测量心脏大小,对有关数据的相关性进行统计学分析。结果：肥胖儿童血压及不同标准下高血压检出率显著地高于正常儿童。高血压肥胖儿童心脏大小10个指标均大于非高血压肥胖者。血压与心脏面积、心脏体积呈低～中度相关。结论：高血压肥胖儿童心脏向各个方向增大,与非高血压者有显著差异。血压与心脏体积指数关系不密切,血压升高,会引起心脏增大和受累。     

小学教师自我概念与心理健康的相关分析

国内外的研究都表明 ,自我概念是心理健康的重要指标 ,客观的自我评价、自我悦纳和积极的自我形象是心理健康的重要标志[3 - 7] 。本文采用美国田纳西心理学家H Fitts编制的田纳西自我概念量表 (TSCS) [1 ] 及症状自评量表(SCL -90 ) [2 ] 对来自浙江省 11个地区 71所学校的 2 5 1名小学教师进行测量 ,其中男 96人 ,女 15 5人。所用TSCS由台湾林邦杰于 1978年修订 ,有比较好的信度和效度。量表共 70个题目 ,包含自我概念的两个维度和综合状况共十个因子 ,即结构维度 :自我认同、自我满意、自我行动 ;内容维度 :生理自我、道德自我、心…     

人脑海马结构与杏仁体的典型相关分析

1 材料和方法1.1 标本制作 随机采用34例(男16例,女18例)经防腐固定之成人头颅标本,标出冠状线(经左、右外耳门)、正中矢状线和眦耳线后,-30℃低温冰冻一周。沿眦耳线切开头颅,并分别向上、向下作连续断片,片厚5 mm,片间耗损1 mm。选取海马结构、杏仁体外观最大的断面测量它们的最大横径和最大矢径,以及相应断面颞叶前端至枕叶后端(简称颞枕叶)的最大横径、矢径(分别与颅外标记之冠状线和正中矢状线平行)。     

修订成人智力量表与智残评定量表的相关分析

龚氏修订的韦氏成人智力量表和龚氏编制的成人智残评定量表被广泛应用于临床，前者主要测查智力商数，如果低于正常水平，智力商数水平越高，而智力障碍的程度越轻；后者主要是社会适应能力的评定，得分越高其智力障碍的程度越重。本文对320例智力残疾患者同时用两个量表测查，Kappa检验表明，两个量表之间存在一致性，在40岁以上年龄层和女性患者的一致性有偶然性误差。Spearman相关分析表明，两个量表呈负相关有显著性意义，在男女性别之间均存在负相关。     

冠心病患者血胰岛素水平与血脂的相关分析

近年来 ,胰岛素抵抗 ,高胰岛素血症与原发性高血压冠心病和血脂的关系颇受临床和科研工作者的兴趣[1 ,2 ] 。笔者探讨了冠心病患者血胰岛素水平与血脂的关系 ,现报告如下。对象和方法一、对象 :(一 )正常人 :35人。均为我院保健科体检合格的健康人 ,无心、肝、肺、肾等重要脏器疾患 ,肝肾功能试验正常 ,无高血压等病史。(二 )病人组 :32人。均为我院临床上明确诊断的住院病人 ,诊断按 1 987年ＷＨＯ制定的标准 ,包括体征、心电图、心超、实验室检查等。二、方法 :(一 )胰岛素测定 :放射免疫分析法。试剂盒由中国同位素公司北方免疫试剂研究…     

颞下颌关节与颅面指标的计算机相关及回归分析

本文用计算机分析统计了118例(236侧)颞下颌关节的12项骨性指标及10项颅面指标的正常值及相关关系。结果表明颞下颌关节各项指标之间、颞下颌关节与颅面各主要指标之间,均存在良好的相关关系。说明颞下颌关节,特别是关节窝和髁突的形态大小具有明显的规律性。由于颅面诸指标与颞下颌关节主要指标之间高度相关,因而本文用逐步回归方法,建立了由颅面特征指标推算髁突形态的回归方程。本文的结果可为该关节的形态研究及人工关节的设计和应用提供有益的依据。     

新消防员人格特质与心理健康的典型相关分析

目的:为了解新消防员的心理健康状况,探讨其人格特质与心理健康的关系,为新训期间开展心理健康教育和新消防员招录选拔工作提供参考依据.方法:抽取上海市567名新消防员,入职培训一周后使用症状自评量表(SCL-90)和中国大五人格问卷简版(CBF-PI-B)进行测量.结果:①共筛查出阳性人员73例,阳性率为13.22％;②新...     

医学生应对方式与人格特征的相关分析

目的探讨医学生应对方式的特点及与其人格特征的关系。方法采用应对方式评定问卷和艾森克人格问卷(EPQ)对石河子大学医学院学生采取分层整群抽样的方法进行测试、分析。结果应对方式测试结果,女生求助因子得分高于男生,男生合理化因子得分高于女生。EPQ问卷评定,男生的P因子得分高于女生,女生的L因子得分高于男生。应对方式因子分与EPQ各维度存在不同程度的相关。结论建议高校管理者应了解学生的这些心理特点,有针对性地进行心理健康教育。     

The Relationship between Arterial Blood Pressure and Pulse Transit Time During Dynamic and Static Exercise

The relationships between arterial systolic and diastolic blood pressure (SBP and DBP), interbeat interval (IBI), and various pulse transit times were investigated in 5 young, healthy males during physical exercise and at rest. Transit times monitored were radial, brachial and dorsalis pedis RPIs (ECG R-wave to pulse intervals), and brachial-radial and radial-dorsalis pedis PPIs (pulse to pulse intervals). Experimental sessions consisted of three periods: two involving mild dynamic exercise plus rests, and one involving static exercise (handgrips) plus rests. Correlation and regression analyses within period and subject were performed on individual beat data. Radial RPI was highly correlated with SBP (during dynamic periods, range ?.57 to ?.89, median r?.81; during static periods, range ?.80 to ?.88, median r=?.87) and moderately correlated with DBP (during dynamic periods, range ?.10 to ?.63, median r?.52; during static periods, range ?.17 to ?.77, median r?.66). Median correlations of radial RPI with SBP and DBP during exercise and rest separately were ?.75 and ?.40 (dynamic), ?.79 and ?.57 (static), and ?.74 and ?.26 (rest). The IBI X radial RPI product was very highly correlated with the rate-pressure product (heart rate X SBP), an index of myocardial oxygen consumption (median r=?.96). The only PPI which reliably indexed SBP or DBP change was brachial-radial PPI during the static exercise period (median r=?.86 and ?.83).     

高血压病患者血脂、血糖与血压关系的研究

目的:探讨高血压病患者血脂、血糖与血压的相关性。方法:测定482例高血压病患者和100例健康人Cho-C、TG、LDL-C、HDL-C、apoA、apoB、血糖(BS)以及血压(SBP、DBP),并进行统计学分析。结果:高血压组Cho-C、TG、LDL-C、BS明显升高(P<0.05~0.01);Cho-C与BS呈明显正相关(P<0.05);TG与BS、SBP、DBP呈明显正相关(P<0.05~0.01);BS与SBP呈明显正相关(P<0.05)。结论:高血压病患者存在脂代谢及糖代谢异常。TG与血糖水平及血压均呈正相关。     

Pulse Transit Time as an Indicator of Arterial Blood Pressure

The relationship between pulse-arrival times and diastolic blood pressure was measured in 10 anesthetized dogs. The pulse-arrival time was measured using the R-wave of the electrocardiogram (ECG) as a time reference. Pulse-transit time was also measured between the carotid and femoral pulses. Blood pressure was raised with epinephrine injected intravenously and lowered with vagal stimulation. In all cases, pulse arrival and transit times decreased with an increase in diastolic pressure for diastolic pressures ranging from 15 to 250 mmHg. The correlation between pulse-arrival time and pressure was poorest when the ECG was used as a timing reference. The best correlation was found with true pulse-transit time and diastolic pressure. When pulse-transit time was used to compute pulse-wave velocity, it was found to increase nearly linearly with blood pressure. From 90–100 mmHg, the pulse-wave velocity increased typically by slightly less than six percent.     

利用视觉诱发电位实现无创颅内高压监测

颅内压(Intracranial pressure,ICP)检测是颅脑疾病诊断的重要前提。但目前临床上常用的是有创颅内压检测方法。如何找到一种方法,既可以有效监测到病人颅内压力的变化趋势,为医生用药提供依据,又能减轻病人痛苦,实现无创监测,是本文研究的目的。我们在分析比较了目前几种无创ICP监测技术的基础上,利用闪光视觉诱发电位(Flash visual evoked potential,FVEP)与颅内中、高压的线性关系,通过独立分量分析方法有效提取VEP,提取的VEP波形的III波对应的波峰潜伏期与颅内压成某种线性关系,因而可以从FVEP的III波得到颅内压力。     

老年高血压患者脉压和心电图变化

目的:分析老年高血压患者脉压(PP)与心电图变化。方法:对291名老年高血压患者进行基本信息调查,并进行血压与心电图的测量,分析不同PP患者血压现状和心电图异常的差异。结果:在老年高血压患者中,1期高血压所占比例最大,为68.73%,86.95%的高血压患者PP值偏高,1期和2期高血压患者中,PP在41～60mmHg者所占比例最高,3期高血压患者中,PP>61mmHg者所占比例最高,且明显高于1期和2期高血压患者,差异均有统计学意义(P<0.05或P<0.01)。PP≥61mmHg组患者各种心电图异常率均高于PP≤40mmHg组(心律失常除外)和PP在40～60mmHg组(左室高电压除外),差异有统计学意义(P<0.05或P<0.01)。结论:高血压患者PP值普遍偏高,PP增加可加重心电图异常发生率,监测PP并行有效干预有助于预防心血管事件的发生。     

无创伤测量手指动脉血压初探

本文提出用手指套光电传感器无创伤测量人体手手指动脉收缩压和平均压的方法，设计了仪器的线路，指出了误差产生的原因，在修正了动脉收缩压，平均压和舒张压三者之间关系后，可得到与水银血计比较接近的测量值。这是一种安全，简单，易行，能自动间歇测量的血压计。     

Effect of Arterial Blood Pressure Reduction on Renal Hemodynamics in the Developing Lamb

Aperia , A. and P. Herin . Effect of arterial blood pressure reduction on renal hernodynamics in the developing lamb. Acta physiol. scand. 1976. 98. 387–394. The relationship between pressure and flow in the kidney has been examined in 2–9 and 31–48 day old lambs. Renal blood flow (RBF), determined by the microsphere technique, and glomerular filtration rate (GFR) were first studied under control conditions. The abdominal aorta was then constricted above the renal arteries until the pressure ranged between 60 and 70 mmHg, i.e. just below the normal auto-regulatory range, and the hemodynamic recordings were repeated. During control conditions the arterial pressure was lower in the younger (93 mmHg) than in the older lambs (107 mmHg). During aortic constriction total RBF and GFR were reduced. In both age groups GFR was reduced out of proportion to RBF. The sodium excretion fell around 60% in both age groups. The fall in perfusion pressure resulted in a more pronounced blood flow reduction to the outer than to the inner cortical glomerular capillaries. This pressure-induced blood flow redistribution was found in both age groups. The consequences of the pronounced effect of reducing the perfusion pressure to 60–65 mmHg for the young lambs with their basally low arterial blood pressure are discussed.