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A left ventricular assist device

An auxiliary device and blood pump technology, applied in the direction of suction devices, etc., can solve problems such as poor hemodynamics, easy damage to the integrity of blood cells, blood flow disorder at valves, etc., and achieve the effect of improving the situation of heart-assisted blood pumping

Inactive Publication Date: 2011-12-21
BEIHANG UNIV
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AI Technical Summary

Problems solved by technology

Although the impact of weakened blood pulsation characteristics on organs and tissues that have long been accustomed to normal physiological pulsating blood supply is still a clinically debated issue, a large number of experimental results have proved that the weakened blood pulsation characteristics will affect the physiological characteristics of vascular cells and blood vessels. Negative effects on blood supply to organs and tissues
In addition, the local high shear force generated by the rotation of impeller or pump shaft parts can easily destroy the integrity of blood cells and cause platelet activation and thrombus formation
[0005] For volume-displacement pumps left ventricular assist devices, although periodic fluctuations in blood flow can be generated, blood flow disturbances will still occur at the valve, accompanied by adverse events such as vortex, high shear force, and low shear force. hemodynamic event
The consequences are similar to the second aspect of the axial-flow left ventricular assist device

Method used

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Embodiment Construction

[0013] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0014] Such as figure 1 As shown, the patent of the present invention is made up of four parts: blood pump 2, artificial blood vessel 1, power supply and control part 3 and power supply and control wire 4. Wherein, the blood pump is a valveless impedance blood pump. Artificial blood vessels are used to connect the blood pump to the left ventricle and the aorta respectively. When the compressed part of the elastic tube 6 in the blood pump is close to the end connected to the ventricle, periodic pulsating blood flow from the ventricle side to the aorta side will be generated under the action of periodic compression. The principle of this blood pumping method is that two sections of rigid tubes are connected by a section of elastic tube in the middle, and the diameters of these three sections of tubes are the same. When the middle part deviated ...

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Abstract

The invention discloses a novel left ventricular assist device, which aims to provide periodic pulsation that is closer to the physiological state to assist in pumping blood for patients with heart failure. It includes four parts: blood pump, artificial blood vessel, power supply and control unit, and power supply and control wire. Wherein, the blood pump is a valveless impedance blood pump. There is no valve in the blood pump, the middle section of the blood pump pipeline is an elastic tube, and the two ends of the elastic tube are respectively connected with rigid tubes of the same diameter. The blood pumping function is realized by periodically compressing the elastic tube through the periodic compression component arranged in the blood pump at a position deviated from the axial center of the elastic tube to generate blood flow driving force.

Description

technical field [0001] The invention relates to a left heart assist device. Background technique [0002] Heart disease is a disease that seriously threatens the health of human beings (especially the elderly), and heart failure is the main reason. At present, heart transplantation is a better surgical treatment option, with a one-year survival rate of 93% and a five-year survival rate of 88%. However, there is a serious shortage of heart transplant donors, so people place their hopes on artificial hearts and various implanted artificial assisting devices. [0003] Left ventricular assist device is a typical heart assist blood supply device. One end of this device is connected to the left ventricle and the other end is connected to the aorta. When working, the arterial blood in the left ventricle is directly pumped into the aorta. There are mainly two types of existing left ventricular assist devices: one is the axial flow (Rotary blood pumps), which uses external force to...

Claims

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Application Information

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IPC IPC(8): A61M1/12
Inventor 孙安强邓小燕樊瑜波
Owner BEIHANG UNIV
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