CAJ | 학술논문

为了更好地解决旋转式叶片血泵的密封问题，本文中采用磁耦合驱动方式，设计、加工一小型轴流血泵。血泵由泵体、直流无刷电机、叶轮、一对磁片、隔膜、导流槽和支撑架等部件构成，总长度125mm，容积147ml，材料是TC4钛合金，总重量380g。体外和在体试验中分别测试血泵的动力学输出、密封、产热和血液破坏等性能。结果显示：①体外试验中，血泵旋转速度8000rpm时输出为6.8L/min、120mmHg。②在120小时的连续运转过程中，血泵的表面温度变化较小；密封性能也较好。③24小时的在体试验中，血浆中游离血红蛋白含量逐渐增大，纤维蛋白原未发生明显变化；除血泵的进出接口处和动物肾脏发现微小血栓外，脑部和其它腹部脏器未发现血栓。
위료경호지해결선전식협편혈빙적밀봉문제，본문중채용자우합구동방식，설계、가공일소형축류혈빙。혈빙유빙체、직류무쇄전궤、협륜、일대자편、격막、도류조화지탱가등부건구성，총장도125mm，용적147ml，재료시TC4태합금，총중량380g。체외화재체시험중분별측시혈빙적동역학수출、밀봉、산열화혈액파배등성능。결과현시：①체외시험중，혈빙선전속도8000rpm시수출위6.8L/min、120mmHg。②재120소시적련속운전과정중，혈빙적표면온도변화교소；밀봉성능야교호。③24소시적재체시험중，혈장중유리혈홍단백함량축점증대，섬유단백원미발생명현변화；제혈빙적진출접구처화동물신장발현미소혈전외，뇌부화기타복부장기미발현혈전。
For rotating blood pump, the sealing problem is a very important one to solve. In this paper, it is introduced that we designed and made a small axial flow pump, applying the magnetic coupling method. The pump consist of a pump body,a brushless DC motor, an impeller, a pair of magnetic discs, a spacer, a blood trough , a support frame, etc. The pump is made of titanium and is 125mm length, 147ml volume, total 380g of weight. Performances of outputting ,sealing, heat creating and damage to blood by the pump were investigated. Results showed for external experiment that: ①The flow rate of the pump was 6. 8L/min against 120mmHg pressure when the rotation speed was 8000rpm. ②The surface t6mperature of the pump didn't change obviously in 120 hours of rotation, and the sealing function was very well. ③For vivo experiment, free hemoglobin in blood plasma increased but fibrinogen didn't change obviously, and, at the end there was some micro thrombi at kidney of sheep and at inlet and outlet of the pump after 24 hours. There was no thrombus at the brain and other abdominal organs.