EVALUATION OF BLOOD COMPATIBILITY OF A CENTRIFUGAL BLOOD PUMP BASED ON THE TRANSIENT FLOW VELOCITY MEASUREMENT FROM THE ROTATING FRAME.

基于旋转框架瞬态流速测量的离心血泵的血液相容性评估。

• 批准号: 13650203
• 负责人: TSUKIYA Tomonori
• 金额: $ 2.24万
• 依托单位: RESEARCH INSTITUTE OF NATIONAL CARDIOVAS CULAR CENTER
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13650203/
• 关键词: artificial heart; centrifugal pump; PIV; impeller; visualization; biocompatibility; 補助人工心臓; 相対速度分布; 回転像静止装置

Flow visualization method has been developed which enables the direct observation and measurement of the relative velocity distribution in the impeller of a centrifugal pump used for cardiac assist. The image rotator containing a beam splitter and a right-angle prism was applied to the double-scale model of a centrifugal pump. The transient flow velocity distribution was measured by the particle image velocimetry (PIV) technique.The results also demonstrated that the passages of the impeller were filled with vortices of various scales, which seemed to contribute to prevention of thrombus formation on the blood-contacting surface of the impeller. The emission from the impeller toward the outlet port was limited to the period when the passage overlapped the area of the outlet port. This unsteadiness was found to be adverse in terms of the pump's hydrodynamic efficiency and the radial thrust. It was moderated by the use of the volute casing. It should be noted, however, that the axial variation of the flow field was enlarged.

已经开发了流动可视化方法，该方法可以直接观察和测量用于心脏辅助的离心泵的叶轮中的相对速度分布。将包含光束分离器和右角棱镜的图像旋转器应用于离心泵的双尺度模型。瞬态流速度分布是通过粒子图像速度计（PIV）技术测量的。结果还表明，叶轮的通道充满了各种尺度的涡流，这似乎有助于预防叶轮的血液接触表面上的血栓形成。从叶轮向出口端口的发射仅限于通道重叠出口端口区域的时期。由于泵的流体动力效率和径向推力，发现这种不稳定是不利的。它通过使用玻璃外壳来调节。但是，应该指出的是，流场的轴向变化扩大。

项目成果

Tsukiya T, Taenaka Y, Tatsumi E, Takano H: "Visualization Study of the Transient Flow in the Centrifugal Pump Impeller"ASAIO Journal. (2002)

Tsukiya T、Taenaka Y、Tatsumi E、Takano H：“离心泵叶轮中瞬态流动的可视化研究”ASAIO 杂志。

Tsukiya T, Taenaka Y, Tatsumi E, Takano H: "Visualization Study of the Transient Flow in the Centrifugal Blood Pump Impeller"ASAIO Jounal. Vol.48, No.4. 431-436 (2002)

Tsukiya T、Taenaka Y、Tatsumi E、Takano H：“离心式血泵叶轮中瞬态流动的可视化研究”ASAIO 杂志。

Tsukiya T, Taenaka Y, Tatsumi E, Takano H: "Visualization of Flow Structure in the Centrifugal Blood Pump Impeller"Journal of Artificial Organs. (2002)

Tsukiya T、Taenaka Y、Tatsumi E、Takano H：“离心式血泵叶轮中流动结构的可视化”人工器官杂志。

Tsukiya T, Taenaka Y, Tatsumi E, Takano H: "Improvement of washout flow in a centrifugal blood pump by a semi-open impeller"ASAIO Journal. Vol.48, No.1. 76-82 (2002)

Tsukiya T、Taenaka Y、Tatsumi E、Takano H：“通过半开式叶轮改善离心式血泵的冲洗流量”ASAIO 杂志。

Tsukiya T, Taenaka Y, Tatsumi E, Takano H: "Improvement of washout flow in a centrifugal blood pump by a semi-open impeller"ASAIO Journal. Vol.48,No.1. 76-82 (2002)

Tsukiya T、Taenaka Y、Tatsumi E、Takano H：“通过半开式叶轮改善离心式血泵的冲洗流量”ASAIO 杂志。