Adding air pressure within the annular space between the housing and sleeve can throttle, or close the valve. 在阀体外壳和套管之间的环形空间内施加气压,即可实现阀门的节流和关闭功能。
Objective To summarize the experience in treating mitral insufficiency ( MI), due to secondary annular dilation in the posterior portion of the annulus with mitral valve reconstruction. 目的总结二尖瓣后环缝缩治疗二尖瓣关闭不全(MI)的临床经验。
Design of Annular Valve of Vacuum Pump of Reciprocating Type 往复式真空泵环状阀的设计
As the key element of water hydraulic servo system, water hydraulic servo valve includes a series of throttles, such as flapper-nozzle valve, annular gap damper, spool valve. 作为水压伺服控制系统的核心部件,水压伺服阀包含喷嘴挡板、环形圆缝、滑阀等一系列的典型阀口型式。
External Annular Venoconstriction on the First Valve of Superficial Femoral Vein for Primary Deep Venous Valve Insufficiency in Lower Limb ( Report of 40 Cases) 股浅静脉第一对瓣膜环缩术治疗原发性下肢深静脉瓣膜功能不全(附40例报告)
Feasibility of aortic annular diameter measurement by echocardiography for aortic valve replacement 超声心动图在主动脉瓣测量和置换术中的作用
The principles and structures of both the MR valve with annular damping gaps and the MR valve possessing simultaneously annular and radial damping gaps are proposed and realized. 提出并实现了两种不同阻尼间隙的磁流变阀的原理与结构:具有圆环阻尼间隙的磁流变阀和同时具有圆环和圆盘阻尼间隙的磁流变阀的原理与结构。
Conclusion Tricuspid annular dilatation, right heart impairment and severe pulmonary hypertension are responsible for the development of late tricuspid regurgitation after mitral valve replacement. 结论二尖瓣置换术后远期三尖瓣功能性关闭不全与三尖瓣环扩大、右心功能损害和严重肺动脉高压有关,三尖瓣环扩大是其重要的原因。