Blood pumping impeller and ventricle assisting device

An impeller and blood pumping technology, applied in the field of medical devices, can solve the problems that the impeller structure cannot meet the requirements of pumping blood flow and hemolytic performance, etc., and achieve the effects of stable pump blood flow field, high blood pumping efficiency, and excellent pumping blood flow.

Active Publication Date: 2021-07-23
FENGKAI MEDICAL INSTR (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is that the existing impeller structure cannot meet the requirements for pump blood flow and hemolysis performance in the case of small size and interventional medical treatment

Method used

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  • Blood pumping impeller and ventricle assisting device
  • Blood pumping impeller and ventricle assisting device
  • Blood pumping impeller and ventricle assisting device

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Experimental program
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Effect test

Embodiment

[0061] In this embodiment, the radius of the blood-pumping impeller is 2.5 mm, and the hub body 1-2 is a circular platform hub 1 with two continuous blades 2. The maximum radius of the hub 1 is 1.25 mm, the minimum radius is 0.25 mm, and the average radius is 0.75 mm. , the axial length is 7.5mm. The thickness of the continuous blade 2 is 0.2mm-0.5mm, and there is a linear transition in the middle.

[0062] The blade setting angle β of the hub profile line 2-8 at the inlet side 2-6 11 is 60°, the blade setting angle β of the outer edge profile line 2-7 at the inlet edge 2-6 12 is 25°, the blade setting angle β of the hub profile line 2-8 at the outlet edge 2-9 21 is 75°, the blade setting angle β of the outer edge profile line 2-7 at the outlet edge 2-9 22 is 45°, and the wrapping angle of the hub profile 2-8 and the outer edge profile 2-7 is 120°.

[0063] The axial length of the continuous blade 2 is 7 mm, and the length L of the outer edge profile line 2-7 is 9.92 mm, w...

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Abstract

The invention discloses a blood pumping impeller. The blood pumping impeller comprises a hub and a blade, and the hub comprises a hub front end and a hub body which are sequentially connected from the far end to the near end; the front end of the hub is a spherical dome or a tip which is obtained by performing rounding treatment on the outer edge of a cylinder and is similar to a spherical dome; the hub body is of a conical structure with the radius gradually increased from the far end to the near end, the blade comprises at least two continuous blade bodies, and the continuous blade bodies are axial flow blades; and each continuous blade body comprises a working face, and each working face adopts a three-dimensional space curved surface. According to the blood pumping impeller, the hub with the generatrix being a parabola or a straight line is matched with the continuous blade bodies, blood is sucked in and flows out in the axial direction, and the blood stably flows through in the axial flow direction, si that collision impact is not generated, the blood compatibility of the miniature blood pump is guaranteed, the higher blood pumping efficiency and the more stable blood pumping field are guaranteed, and the blood pumping flow and the hemolytic property are excellent in the field of small-size interventional medical treatment.

Description

technical field [0001] The invention relates to the field of medical equipment, in particular to a blood-pumping impeller and a ventricular assisting device. Background technique [0002] Percutaneous coronary intervention (PCI) is a common and effective method for the treatment of coronary heart disease. Compared with heart bypass surgery, PCI surgery has lower risk, less trauma, less difficult operation and faster postoperative recovery. In addition, PCI surgery is also applicable to the rescue of acute myocardial infarction, and restores the patient's myocardial state by quickly restoring the blood perfusion of blocked blood vessels. [0003] Artificial left ventricular assist device (LVAD) is a device that actively pumps the blood in the left ventricle into the aorta through the work of the blood pump. The blood pumping performance is completely determined by the operation mode of the blood pump and does not depend on the patient's physical state. It is an active type. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/18A61M60/178A61M60/216A61M60/804
CPCF04D29/181
Inventor 薛志宽唐智荣刘智勇
Owner FENGKAI MEDICAL INSTR (SHANGHAI) CO LTD
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