Analyses of Pulse Wave Propagation in Arteries
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摘要: 将血管简化为弹性管，并考虑组织对血管壁的约束，利用力学方法建立血液流过血管的力学模型．通过理论分析对脉搏波在血管中的传播规律进行研究，同时分析了血液粘性、血管壁弹性模量、管径对波的传播的影响．通过对考虑血液粘性和不考虑血液粘性的结果比较，发现血液的粘性对脉搏波的传播的影响不能忽略，并且当弹性模量增大时，传播速度增大，血流的压力值增高；血管直径减小时，血流压力也增高，脉搏波速度增大．理论分析得到的结果也有助于利用脉搏波的信息来分析和辅助诊断一些人体疾病的病因．Abstract: The blood vessel was regarded as the elasticity tube. And the tissue was considered to re strict the blood vessel wall. The rule of pulse wave propagation in blood vessel was studied. The vis cosity of blood, the elastic modulus of blood vessel and the radius of tube that influenced the pulse wave propagation were analyzed. The result comparison that considered the viscosity of blood with another result shows the viscosity of blood that influences the pulse wave propagation can not be ne glected. The speed of propagation augments with the accretion of the elastic modulus. When the press value of blood stream heightens and diameter of blood vessel reduces, the press of blood stream also heightens, the speed of pulse wave also augments. These results will contribute to making use of the information of pulse wave to analyse and auxiliarily diagnose some causes of human disease.
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Key words:
- pulse wave /
- viscosity of blood /
- press wave
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[1] Okada M.Possible determinants of pulse-wave velocity in vivo[J].IEEE Trans BME,1988,35(5):357—360. doi: 10.1109/10.1394 [2] Shalak R,Keller S R，Secomb T W.Mechanics of blood flow[J].ASME Trans Biomech Eng,1981,31(8):103. [3] Womersley J R.Oscillatory flow is arteries:the constrained elastic tube as a method of arterial flow and pulse transmission[J].Phys Med Biol,1957，(2):178—187. [4] 麦克唐纳 D A.动脉中的血液流[M].柳兆荣 译.北京:科学出版社,1982,134. [5] Berger D S,Li J K-J,Noodergraaf A.Arterial wave propagation phenomena,ventricular work,and power dissipation[J].Ann Biomed Eng,1955,23(6):804—811. [6] Fung Y C.Pseudoelasticity of arteries and the choice of its mathematical expression[R]. American Physiological Society,1979,H620—H631. [7] 王英晓，吴望一，温功碧.心脏和血管系统动态耦合对人体体动脉搏波传播的影响[J]. 应用数学和力学，1998，19（7）：565—576. [8] 姚大康，严育兵，柳兆荣.血液粘弹性对动脉中脉搏波传播的影响[J].应用数学和力学，2000，21（9）：954—960. [9] 谢官模，张光辉，常晓年.非线性血流脉搏波在动脉内传播的理论模型[J].武汉理工大学学报，2001，23（7）：77—79. [10] 朗道 L D，栗弗席兹 E M.连续介质力学[M].第一册.彭旭麟 译.北京：人民教育出版社，1985，20. [11] 王炳和，杨禺，相敬林.脉搏声信号检测系统实验设计及功率谱特征[J].中华物理医学杂志,1998，20(3):52—54. -
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