摘要
分析了心脏功能的“泵说”和“波说”。研究表明,心脏扮演的角色实际上不是泵,而是脉搏波发生器,产生一系列携带能量的脉搏波。每个脉搏波由升支和降支组成。前者对应于加载过程:压力、粒子速度、能量和血氧饱和度均随时间升高。而后者则对应于卸载过程:压力、粒子速度、能量以及血氧饱和度都下降,直至为零。因此,“泵说”中诸如Windkessel效应、一机二泵和舒张泵等概念都难以成立。所谓约1.5 W的心脏功率实质上表征了每个脉搏波的功率。针对脉搏波是流-固耦合和纵波-横波耦合的复杂波之特征,研究表明,能量的主要部分(99.99%)由横波携带,它沿固体血管传播,损耗低,效率高。研究还表明,血管分支处广义波阻抗的增大有助于抵消脉搏波传播中的衰减耗散,升高传入血管分支的脉搏波脉压,可视为人体的一种自我调节机制。
The“pump theory”and“wave theory”of cardiac function are analyzed.It is shown that the heart plays a role actually not as a pump but as a pulse generator,producing a series of pulse waves that carry energy.Each pulse wave consists of an ascending branch and a descending branch.The former corresponds to a loading process,in which the pressure,particle velocity,energy as well as oxygen saturation all increase with time.While the latter corresponds to an unloading process,in which the pressure,particle velocity,energy as well as oxygen saturation all decrease,up to zero.So the concepts proposed in the“pump theory”,such as the Windkessel effect,one engine-two pump and diastolic pump,all do not hold up.The cardiac power of about 1.5 W essentially represents the power of each pulse wave.Aimed at the characteristic that the pulse wave is a complex wave with fluid-solid coupling and longitudinal wave-transverse wave coupling,it is shown that the main part of energy(99.99%)is carried by the transverse waves,which propagate along the solid blood-vessel so that the dissipation is low and the efficiency is high.Moreover,it is shown that the increase of generalized wave impedance at the vascular branches may help to counteract the attenuation and dissipation of pulse waves and increase the pulse pressure propagating into the branches,which may be regarded as a kind of self-regulation mechanism of human body.
作者
王晖
王礼立
缪馥星
龚文波
浣石
徐冲
WANG Hui;WANG Lili;MIAO Fuxing;GONG Wenbo;HUAN Shi;XU Chong(WANG Hui Workroom,Ningbo Hospital of Traditional Chinese Medicine,Ningbo 315000,Zhejiang,China;Key Laboratory of Impact and Safety Engineering,Ministry of Education,Ningbo University,Ningbo 315211,Zhejiang,China;Jihua Laboratory,Foshan 528200,Guangdong,China)
出处
《爆炸与冲击》
EI
CAS
CSCD
北大核心
2020年第11期2-11,共10页
Explosion and Shock Waves
基金
国家自然科学基金(11872218,11572161)
浙江省医药卫生科研项目(2018KY712)
宁波市首批医疗卫生品牌学科基金(PPXK2018-07)。
关键词
心脏功能
泵说
波说
中医
脉搏波
cardiac function
pump theory
wave theory
traditional Chinese medicine(TCM)
pulse wave
作者简介
第一作者:王晖(1941-),男,主任中医师,教授,zhengyedoc@163.com;通信作者:王礼立(1934-),男,教授,博士生导师,wanglili@nbu.edu.cn。
