Modeling and Simulation of an Invasive Mild Hypothermic Blood Cooling System

Na Wang, Qinghua Liu, Yan Shi, Shijun Wang, Xianzhi Zhang, Chengwei Han, Yixuan Wang, Maolin Cai, Xunming Ji

Research output: Contribution to journalArticlepeer-review

Abstract

Nowadays, mild hypothermia is widely used in the fields of post-cardiac arrest resuscitation, stroke, cerebral hemorrhage, large-scale cerebral infarction, and craniocerebral injury. In this paper, a locally mixed sub-low temperature device is designed, and the cold and hot water mixing experiment is used to simulate the human blood transfer process. To set a foundation for the optimization of the heat transfer system, the static characteristics are analyzed by building the mathematic model and setting up the experimental station. In addition, the affection of several key structure parameters is researched. Through experimental and simulation studies, it can be concluded that, firstly, the mathematical model proved to be effective. Secondly, the results of simulation experiments show that 14.52 °C refrigeration can reduce the original temperature of 33.42 °C to 32.02 °C, and the temperature of refrigerated blood rises to 18.64 °C, and the average error is about 0.3 °C. Thirdly, as the thermal conductivity of the vascular sheath increases, the efficiency of the heat exchange system also increases significantly. Finally, as the input cold blood flow rate increases, the mass increases and the temperature of the mixed blood temperature decreases. It provides a research basis for subsequent research on local fixed-point sub-low temperature control technology.

Original languageEnglish
Article number23
Number of pages9
JournalChinese Journal of Mechanical Engineering (English Edition)
Volume34
Issue number1
DOIs
Publication statusPublished - 17 Feb 2021
Externally publishedYes

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