Artificial heart driving system driven with liquid-gas phase transition

液气相变驱动的人工心脏驱动系统

• 批准号: 02557052
• 负责人: CHINZEI Tsuneo
• 金额: $ 10.5万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Developmental Scientific Research (B)
• 财政年份: 1990
• 资助国家: 日本
• 起止时间: 1990 至 1992
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-02557052/
• 关键词: Artificial Heart; Driving System; Liquefied Gas; Closed Circuit; 空気圧駆動; 模擬循環回路; 左心バイパス

As driving mechanism of artificial heart, pneumatic, hydraulic and mechanical drivers are employed. Pneumatic driving mechanism has the advantage that the blood pump shape can be determined freely. However, this mechanism has disadvantage that driving apparatus is larger than other mechanism. To reduce the size of pneumatic drivers, we develop a new driving method with closed circuit of liquefied gas as the driving mediator. The principle of this method was that a single compressor produced low and high pressure with liquefied gas. The high pressure was maintained in a small reservoir with liquid-gas phase equilibrium. The high and low pressure were applied to sac type artificial heart, alternately.According to this driving principle, we developed two type of liquefied gad driving circuit. In the first type, we consisted the driving apparatus as sequential circuit:compressor, condenser, evaporator, valves and blood pump. In this model, the apparatus can drive an blood pump at the flow of 3 to 4L/min. However, driving pressure was unstable, In the second type, we made two modification upon the principle:the bypass line and the isolator. In this model, the driving pressure is stabilized and the energy converting efficiency was improved.

人工心脏的驱动机构有气动驱动器、液压驱动器和机械驱动器。气动驱动机构的优点是血泵形状可以自由确定。然而，该机构的缺点是驱动装置比其他机构大。为了减小气动驱动器的尺寸，我们开发了一种以液化气闭路作为驱动介质的新驱动方法。该方法的原理是单个压缩机用液化气体产生低压和高压。高压保持在一个具有液-气相平衡的小储罐中。对囊式人工心脏交替施加高压和低压。根据这一驱动原理，我们开发了两种类型的液化气驱动电路。第一种类型的驱动装置由顺序电路组成：压缩机、冷凝器、蒸发器、阀门和血泵。在该模型中，该装置可以以3至4L/min的流量驱动血泵。但驱动压力不稳定，对于第二种，我们在原理上做了两处修改：旁通管路和隔离器。该模型稳定了驱动压力，提高了能量转换效率。

项目成果

鎮西 恒雄: "液化ガスによる人工心臓駆動装置(第2報)" 医用電子と生体工学. 30(Suppl). (1992)

Tsuneo Chinzai：“使用液化气体的人工心脏驱动装置（第二次报告）”《医疗电子和生物工程》30（增刊）。

今西 薫: "心臓移植の手術手技で装着可能な人工心臓ポンプの開発" 人工臓器. 20. 699-704 (1991)

Kaoru Imanishi：“可在心脏移植手术期间连接的人工心脏泵的开发”Artificial Organs（人工器官）。

鎮西 恒雄: "液化ガスによる人工心臓駆動装置(第2報)ー装置の小型高効率化" 医用電子と生体工学. 30(Suppl). 446- (1992)

Tsuneo Chinzei：“使用液化气体的人工心脏驱动装置（第二次报告） - 紧凑且高效的装置”医疗电子和生物工程 30（增刊）。

阿部 裕輔: "液化ガスを用いた人工心臓駆動装置の開発" 電気学会マグネティクスリニアドライブ合同研究会資料. 59-63 (1991)

Yusuke Abe：“使用液化气体开发人工心脏驱动装置”IEEJ Magnetics Linear Drive Joint Study Group Materials 59-63 (1991)。

阿部 裕輔: "液化ガスによる人工心臓の駆動" 人工臓器. 19. 3-6 (1990)

Yusuke Abe：“使用液化气体驱动人造心脏”Artificial Organs。 19. 3-6 (1990)