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.

本文提出了一种直接观察和测量心脏辅助离心泵叶轮内相对速度分布的流动显示方法。将由分束镜和直角棱镜组成的像旋转器应用于离心泵的双尺度模型。利用粒子图像测速技术（PIV）测量了叶轮内的瞬时流速分布，结果表明叶轮内的通道内充满了不同尺度的旋涡，这些旋涡有助于防止叶轮与血液接触表面的血栓形成。从叶轮向出口的排放被限制在通道与出口区域重叠的时期。这种不稳定性被认为是不利的泵的流体动力效率和径向推力。这是缓和的使用蜗壳。然而，应该注意的是，流场的轴向变化被放大。

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。