A heart valve prosthesis has an annular valve body with a central circular passageway and a pair of valve leaflets supported for pivotal movement between closed and open positions. Guides formed with spheroidal surfaces project in opposite directions along the pivotal axis of each leaflet and are ...
Arteries carry blood away from the heart, while veins carry blood back to the heart. Both arteries and veins have muscular walls, but arteries have an additional elastic layer to allow for stretch and veins have one-way valves to prevent for backflow. The point at which veins and arteries ...
The annular prosthesis includes an annular ring for dilating tissue within a biological annulus and a conformable sewing cuff extending radially from the annul... E Lane,MJ Drews,DW Gurskis - CA 被引量: 48发表: 2012年 SYSTEMS AND METHODS FOR MANUFACTURING PROSTHETIC HEART VALVES USING A SINGLE...
adesigned in compact modules of two valves individually combined in their functions。for an odd number ofvalves,it is necessary to use the single valve module position before the rear and plate。 设计在他们的作用单独地结合的二个阀门紧凑模块。为一个奇数ofvalves,在后方和板材之前使用唯一阀门模块位置...
Flow driven by pumping without valves is examined, motivated by biomedical applications: cardiopulmonary resuscitation (CPR) and the human fetus before the development of the heart valves. The direction of flow inside a loop of tubing which consists of (almost) rigid and flexible parts is investigat...
Successful surgical correction was performed in both cases. Two morphogenetic hypotheses are proposed: abnormal development of the septum primum or primitive malposition of the common atrioventricular canal. 展开 关键词: Vena Cava, Superior Heart Atria Heart Valves Humans Heart Defects, Congenital Heart ...
Heart Valve Culture and Sequencing to Identify the Infective Endocarditis Pathogen in Surgically Treated Patients Background Testing excised valves in surgically treated infective endocarditis (IE) patients provides an opportunity to identify the microbial etiology of ... NK Shrestha,CS Ledtke,H Wang,....
For the hydraulically driven joint of a large manipulator, a new control scheme is applied using the flatness of the hydraulic actuator with two valves. Po... R Bindel,R Nitsche,R Rothfuss,... - Automatisierungstechnik: Methoden und Anwendungen der Steuerungs-, Regelungs- und Informationstec...
甲乙两人制作茶叶，甲每天制作的量保持不变，乙每天制作的量都是前一天的一倍。已知两人从2号开始一起制茶，2日当天，两人一共制作茶叶10公斤，3日当天，两人一共制作茶叶12公斤，那么，哪一天时，乙单独制作的茶叶量超过甲的？（ ）
It is evident that several cell populations act in concert during the formation of the semilunar valves. These include the endocardial cushions, neural crest cells and second heart field. Less is known about the development of the arterial valves in reptiles where bicuspidy is the rule [13,14...