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目的:建立可仿真推拉效应引起人体心血管变化的、非线性分布式人体心血管系统模型,并通过与真实实验数据对比,验证模型的有效性。方法:在分析推拉效应对心血管系统影响的基础上,对模型进行设计,并利用Pascal语言,建立一个将心脏、血管系统和反馈机制相结合的闭环心血管系统模型。结果:建立的分布式模型包括左、右心室和心房4腔室,大中动、静脉血管各22段,中小动、静脉等外周血管12段,并包含颈动脉压力调节和静脉塌陷模型。仿真结果与报道的人体旋转床和离心机实验数据相近。结论:该模型可以有效地模拟飞行员做推拉动作时心血管系统的响应,为推拉效应的研究提出了一个经济、实用的方法。
Objective: To establish a non-linear distributed human cardiovascular system model that can simulate the cardiovascular effect of human body caused by the push-pull effect and verify the validity of the model by comparing with the real experimental data. Methods: Based on the analysis of the effect of the push-pull effect on the cardiovascular system, the model was designed and a closed-loop cardiovascular system model combining the heart, vascular system and feedback mechanism was established by using Pascal language. Results: The established distribution model includes four compartments of left and right ventricles and atria, 22 segments of middle and small artery and vein, 22 segments of peripheral vessels such as middle and small artery and vein, and includes carotid artery pressure regulation and venous collapse model. The simulation results are similar to those reported in the human bed and centrifuge. Conclusion: This model can effectively simulate the response of the cardiovascular system when the pilot makes push and pull actions, and provides an economical and practical method for the study of the push-pull effect.