查询词典 stenosis

The symptoms of aortic stenosis may resemble other medical conditions or heart problems.

主动脉狭窄的症状可能类似于其他的疾病或心脏问题。

Congenital aortic stenosis occurs in 3 to 6 percent of all children with congenital heart disease.

先天性主动脉狭窄的发病率占所有先天性心脏病患儿的3－6％。

In clinical and experimental studies, it has been found that cerebral ischemia and cerebral infarction were easy induced by hypotension in elder, hypertensive cerebral arteriolosclerosis, and stenosis or occlusion in carotid artery or in major cerbral arteries, butnow the effect machanisms still remain unclear.

从临床研究和动物实验也发现，在年老、高血压脑动脉硬化和颈动脉或大的脑动脉狭窄或闭塞时，低血压易诱发脑缺血和脑梗塞，但是目前其作用机制还未完全阐明。

Between 6th and 14th weeks afteconstricted bilateral renal arteries, the blood pressure in the majority of RHRSP with cerebral infarction was obviously higher than in RHRSP without cerebral infarction (28. 8±2. 24kPa～32. 3 ±2. 88kPa, 26. 2±2. 01～28. 3±2. 33kPa respectively). Severe hyalinosis, fibrosis, wall hypertrophy, lumen stenosis, and even microaneurysm formation in cerebral small arteries in RHRSP with cerebral infarction were found, while slight to mild arteriolosclerosis in RHRSP was found without cerebral infarction.

本实验发现，RHRSP在经受不同水平的低血压后，产生脑梗塞的大多数（32/38只）在肾动脉狭窄术后第六周至第十四周，血压为28.8±2.24 kPa～32.3±2.88 kPa（216±17mmHg～242±22mmHg），显著高于无脑梗塞的RHRSP，并且发现这些RHRSP的脑内小血管呈严重的透明样变、纤维素样变性，管壁增厚，管腔狭窄，部分有微动脉瘤形成；而无脑梗塞的RHRSP的血压为26.2±2.01kPa～28.3±2.33 kPa（200±15mmHg～212±17.5mmHg），其脑内小血管呈轻至中度的动脉硬化改变。

Compared with DSA, appreciate accuracy of 64-slice CTA in diagnosis of cerebral and carotid arterious stenosis.

目的 以DSA结果为对照标准，评价64层螺旋头颈血管CTA判断不同程度狭窄的准确性。

Various arterious stenosis diagnosed by CTA were 115 segment, DSA 108 segment.

CTA显示不同程度狭窄的血管段共115段； DSA显示不同程度狭窄的血管段共108段。

Various arterious stenosis diagnosed by CTA were 115 segment, DSA 108 segment.

结果 以双侧颈、椎动脉为观察对象，共观察108支血管。

As a non-invasive and quick method, 64-slice CT angiography in cerebral and carotid arteries can display clearly cerebral and carotid arterious stenosis,which has a high sensitivity and specificity.

64层螺旋CT头颈血管CTA无创，快捷，简单易行，能够清晰显示颅颈部动脉狭窄性病变，具有较高的敏感性与特异性。

Sensitivity of 64-slice CTA in diagnosis carotid and vertebral arterious stenosis is respectively 97.70%、93.75%, specialty is respectively 99.51%、99.57%.

CTA显示不同程度狭窄的血管段共115段； DSA显示不同程度狭窄的血管段共108段。64层CTA对颈、椎动脉狭窄总的诊断敏感度分别为97.70%、93.75%，特异度分别为99.51%、99.57%。

Sensitivity of ####-slice CTA in diagnosis carotid and vertebral arterious stenosis is respectively 97.70％、93.75％, specialty is respectively 99.51％、99.57％.

层CTA对颈、椎动脉狭窄总的诊断敏感度分别为97.70％、93.75％，特异度分别为99.51％、99.57％。

The work of this paper is as follows: 1. Looking back the progressing history of the linear motor, introducing the features of the elevator driven by linear induction motor, radicating the topic of this paper "the digital frequency variable control of the elevator bi-side direct driven by linear induction motor". The research of this paper covers the conventional VVVF control, space vector based VVVF control, vector control and DTC.

本文主要开展了以下几个方面的工作： 1 回顾了直线电机发展历史，电机的驱动技术演变，特别是针对直线电机的驱动，简要介绍了直线感应电机驱动电梯的优点和不同结构类型，对传统的v／f控制，基于空间矢量法的v／f控制，矢量控制，和基于电压空间矢量的直接转矩控制进行了比较，确立了本课题的研究主题：直线感应电机双边直推式驱动电梯的全数字变频控制。

The article combines with the treatment of a superficial civil air defense work to introduce how the grouting method to improve the performance of the backfill soil.

文章从治理漂浮人防工事的角度提出了注浆技术在改善回填土性质方面的应用，并详细阐述了注浆技术的施工流程。