Fluid dynamic study on nutating centrifugal blood pump

章动离心血泵流体动力学研究

• 批准号: 62850034
• 负责人: AKAMATSU Teruaki
• 金额: $ 3.52万
• 依托单位: Kyoto University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Developmental Scientific Research
• 财政年份: 1987
• 资助国家: 日本
• 起止时间: 1987 至 1988
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-62850034/
• 关键词: Nutating centrifugal blood pump; Tea spoon pump; Rotary blood pump; 溶血試験; 代用赤血球; ポンプ特性; ポンプ効率

Conventional centrifugal blood pumps have drawbacks: blood degeneration at hot spots in the bearing of closed magnetic coupling drive, and infection and contamination through the shaft seal in direct motor drive. To overcome these problems, there is a centrifugal pump with nutating impeller, the so-called tea spoon pump. We have improved pump efficiency and characteristics by the following devices: (a) annular flow passage surrounded with an inner wall and outer housing wall, (b) contoured spira6 inlet and diffuser outlet, (c) codgel impeller rod.Careful and refined design of profile and size of the above three components results in the higher pump efficiency up to 53 % and in the lower recessary rotational impeller speed from 3000 rpm to 2500 rpm. So we can expect the lower hemolysis. For red blood cell, we substitute micro dye capsules which are particles of sensing sheet for industrial use. The released dye concentration is related to shear stress in the flow field and these capsules proved to be useful for hemolysis test. Observing f6ows inside the pump by Laser Doppler Velovimeter and pressure transducers, we will search for the higher pump performance and will develop an implantable centrifugal blood pump.

传统的离心式血泵具有缺点：在封闭式磁耦合驱动器的轴承中的热点处的血液退化，以及在直接电机驱动器中通过轴密封件的感染和污染。为了克服这些问题，有一种带有章动叶轮的离心泵，即所谓的茶匙泵。我们通过以下设备提高了泵的效率和特性：（a）由内壁和外壳壁围绕的环形流动通道，（B）成型螺旋入口和扩散器出口，（c）混凝土叶轮杆。对上述三个部件的轮廓和尺寸进行了仔细和精细的设计，使泵的效率提高到53%并且在较低的凹槽中旋转叶轮的速度从3000 rpm到2500 rpm。所以我们可以期待较低的溶血。对于红细胞，我们用微染料胶囊代替工业用的传感片颗粒。释放的染料浓度与流场中的剪切应力有关，并且这些胶囊被证明可用于溶血试验。利用激光多普勒测速仪和压力传感器观察泵内流场，寻求更高的泵性能，研制植入式离心血泵。

项目成果

T. Shiriyama: "Improvement of performance of nutating centrifugal blood pump and simulation of its hemolysis test" Japanese Journal of Artificial Organs. 18. 551-554 (1989)

T. Shiriyama：“章动离心血泵性能的改进及其溶血试验的模拟”日本人工器官杂志。

赤松映明: ターボ機械協会誌. 15. 15-20 (1987)

Akamatsu, H.：涡轮机械协会杂志 15. 15-20 (1987)。

山田典孝: 日本機械学会関西支部第247回講演会講演前刷集. 162-163 (1987)

Noritaka Yamada：日本机械工程师学会第 247 届关西分会预印本集 162-163 (1987)。

山田典孝: 日本機械学会関西支部第64期定時総会講演会講演. 131-132 (1989)

Noritaka Yamada：在日本机械工程师学会关西分会第 64 届年会上的演讲 131-132 (1989)。

藤田毅: 日本機械学会関西学生会卒業研究発表講演会前刷集. 54 (1989)

藤田刚：日本机械工程学会关西学生会毕业研究演讲预印本集 54（1989）。