心瓣流体动力学研究进展

心瓣流体动力学是近年来才形成的一门新兴边缘学科分支。本文比较全面地介绍了该学科的主要研究内容、研究特点、发生发展的历史和现状,以及笔者及其同事在这方面的工作,提出并论述了对学科发展有重大影响的几个富有挑战性的问题,从而预示了学科的发展方向      

Study of the closing mechanism of natural heart valves

At present, there are still some controversial considerations on the closing mechanismof natural heart valves. In this area. a lot of phenomena still remain mysterious.particularlyfor the mechanism of earlier partial closure of the valve white the blood ejection is still in itsacceleration phase. It is the purpose of this study to focus on the problem of earlier closuremechanism of heart valves by using both theoretical analysis and experimentalverifications. A certain two-dimensional mathematical model of closure with allcontributing factors and the whole operating process being considered is investigated with anew analytical method Several new conclusions were found. The main points are asfollows:I. During the opening phase, the main factor of motion of the valve is the acceleratingflow, and the decelerating flow plays a main role during most the of time of the decelerationphase. But during the quasi-steady phase of blood ejection. it is the vortex in the sinus thatcontrols the valve closure.2. For Ih     

生物力学研究的进展与预测

本文略述当今生物力学的主要研究领域及正在形成的研究体系;评介我国生物力学研究的进展和国际上有关生物力学的研究动态;对今后生物力学研究可能出现的突破性进展,作了初步预测.     

天然心瓣关闭机理研究

本文在二维模型假定的基础上,从一个新的角度,通过理论分析和实验研究,解决了心脏瓣膜在射血加速相的部分关闭机理以及旋涡在瓣关闭中的作用这两个心瓣关闭机理研究中长期以来一直悬而未决的问题,并指出了窦(或瓣叶后空腔)对有效瓣膜关闭的决定性作用.此外,本文还研究了瓣长、频率等对瓣运动的影响.估计本文的研究对人工心瓣的研制有一定参考作用.