瓣膜

Results The main structure of the left ventricle in canine was composed of the mitral complex、aortic valve、falsetendons and so on,among them the mitral complex was included in the mitral ring and valve,chordae tendinease and papillary muscles;the circle of mitral ring was 49.16±10.00mm,the average heights of inside and outside valves were 14.28±3.14mm,9.27±1.99mm,respectively,the breadth were 25.74±5.21mm、21.50±6.33mm;the average number of chordae tendineass was 16.72±2.76;the average number of left ventricular false tendon was 4.69±3.38:the circle of aortic valve ring was 34.55±8.00mm,the average heights of left、right and back aortic valves were 6.85±1.76mm、7.19±1.75mm and 7.52±1.79mm.

结果：犬心左心室主要结构有二尖瓣复合体、主动脉瓣、假腱索等，其中二尖瓣复合体由瓣环、瓣膜、腱索、乳头肌构成；二尖瓣瓣环周径为49.16±10.00mm，内侧瓣、外侧瓣的高度分别为14.28±3.24mm、9.27±1.99mm，其宽度分别为25.74±5.21mm、21.50±6.33mm；腱索总数平均为16.72±2.76条；假腱索总数平均为4.69±3.38条；主动脉瓣瓣环周径为34.55±8.00mm，左瓣高度、右瓣高度和后瓣高度分别为6.85±1.76mm、7.19±1.75mm和7.52±1.79mm。

The aortic valve shows three thin and delicate cusps.

主动脉瓣是三个薄而灵活的瓣膜。

Mechanical stress is distributed abnormally across the two cusps of these bicuspid valves causes them to "wear out" earlier than expected.

机械应力在这种二叶主动脉瓣的分布异常，导致了瓣膜的&磨损&早于预期。

Each valve has a set of flaps called leaflets or cusps. These seal or open the valves.

每一个瓣膜都有一套瓣片来进行打开和关闭动作。

Cement can be successfully bullheaded down the tubing without causing gas lift valve replacement problems.

水泥能成功牛下来油管气举不致造成瓣膜置换的问题。

A variety of techniques have been suggested to facilitate myocardial protection, aortic cross-clamping and ensure good valve visualization including the Port-Access platform, direct aortic cross-clamping, long-shafted instruments and thoracoscopy or robotics.

多种手术技术被建议进行心肌保护，主动脉交叉钳夹和确保好的瓣膜显影包括搭桥平台，直接主动脉交叉钳夹，长柄器械和胸腔镜检查术或机器人技术应用。

The aortic wall thickness and lumenal diameter had no significant change but obvious stiffness and calcification were found.

术后6个月切取带瓣管道见：带瓣管道无扩张、血栓形成、瓣膜粘连、增厚、狭窄及关闭不全等改变，带瓣管道管壁厚度和管腔大小与术前无明显变化，但管壁明显僵硬，有局限性钙化现象。

A transport and delivery system for nanogram quantities of molecular species that does not use microfluidic channels, pumps, or valves is described.

本文介绍了一种不需要微流体通道、泵或瓣膜的纳克量分子运输和递药系统。

Objective To study variation of plasma warfarin concentration and its clinical significance in patients with heart valve replacement.

目的 探讨心瓣膜置换术后血浆华法林浓度的动态变化及其临床意义。

To investigate the use of warfarin sodium after mechanical heart valve replacement.

目的 研究心脏机械瓣膜置换术后华法林钠的应用。

In this paper, the requirement analysis, design and implementation of the system are introduced in detail.

此论文详细介绍了系统的需求分析，系统设计和具体实现。

In the context of economic globalization is increasingly deepening, China's economy can not be spared.

在经济全球化日益加深的背景下，中国经济不可能做到独善其身。