Blood pump

A blood pump and blood flow technology, applied in the field of blood pumps, can solve the problems of limited size and shape design, increase the difficulty of impeller processing, reduce the pumping efficiency of the impeller, etc., achieve flexible design, increase load torque and power, and improve The effect of pumping efficiency
CN112587792APending Publication Date: 2021-04-02SHENZHEN CORE MEDICAL TECH CO LTD
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
SHENZHEN CORE MEDICAL TECH CO LTD
Publication Date
2021-04-02

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Abstract

The invention provides a blood pump. The blood pump comprises a cannula having a blood flow inlet and a blood flow outlet, an impeller disposed within the cannula, and a driving unit for rotating theimpeller; the driving unit comprises a shell, a rotor and a stator, wherein the rotor and the stator are arranged in the shell; the rotor comprises a rotating shaft; and the driving unit is characterized in that the rotor also comprises at least two magnets arranged on the rotating shaft; the stator comprises a first stator body and a second stator body which are arranged around the rotating shaft; the first stator body and the second stator body are arranged in the axial direction in a spaced mode; a rotating magnetic field generated by the first stator body interacts with one of the two magnets so that the rotating shaft can rotate; and a rotating magnetic field generated by the second stator interacts with the other one of the two magnets so as to enable the rotating shaft to rotate. According to the blood pump, on the basis that the overall radial size of the blood pump is reduced, the output power and the load torque of the driving unit of the blood pump can be increased.
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Description

technical field

[0001] The invention relates to the field of medical devices, in particular to a blood pump percutaneously inserted into blood vessels of patients. Background technique

[0002] An intravascular blood pump, designed to be inserted percutaneously into a patient's blood vessel, such as an artery or vein in the thigh or armpit, can be advanced into the patient's heart to function as a left ventricular assist device or a right ventricular assist device . Therefore, an intravascular blood pump may also be referred to as an intracardiac blood pump.

[0003] The intravascular blood pump mainly includes an impeller and a motor driving the impeller to rotate. When the impeller rotates, blood is delivered from the blood inflow port of the blood pump to the blood outflow port. Specifically, when the motor works, a rotating magnetic field is generated, and the impeller is provided with a magnet interacting with the rotating magnetic field to make the impeller rotate ar...

Claims

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