CN100536801C - artificial heart valve pump - Google Patents

Abstract

An artificial cardiac valve pump for helping the failing heart by installing it in the heart is coposed of the rotor consisting of magnetic steel and blade wheel made of ferromagnetic material and the stator consisting of coil, iron core and guide blade at output position. Its shape and volume are same as those of natural valve.

Description

artificial heart valve pump

technical field

The invention relates to the field of medical devices, in particular to an artificial heart valve pump, which is mainly used to assist a failing heart to maintain normal blood circulation.

Background technique

The artificial heart valves and artificial heart pumps currently used clinically have their own shortcomings and advantages. Artificial valves can replace failed natural heart valves, prevent blood from flowing backwards, keep blood flowing in one direction and unobstructed, and have a long survival period (decades); , causing stagnation points and vortices in the blood, which can easily cause thrombosis: Artificial heart pumps can assist the failing myocardium to complete the pumping function, but generally occupy additional anatomical space and interfere with the natural blood circulation system.

Contents of the invention

The purpose of the present invention is to provide an artificial heart valve pump, which is a new concept that combines the existing artificial heart valve and artificial heart pump into one; it has dual functions, which can not only keep the blood flowing in one direction, but also To complete the pumping function, it adopts the same shape and size as a heart valve and does not require additional anatomical space.

The purpose of the present invention is achieved like this:

The artificial heart valve pump adopts the same shape and size as the heart valve. It includes a stator and a rotor. The rotor is in the stator. The rotor is composed of magnetic steel and impellers around the impeller; Consisting of coils, iron core and guide vanes at the outlet, the impeller is made of ferromagnetic material with surface coating, which also acts as a magnetic circuit. When the coil is energized, the rotor rotates, driving the blood to rotate and flow axially. The function of the guide vane is to eliminate the rotational component of the blood flow and reduce the damage of the blood.

The advantages of this artificial heart valve pump are:

(1) Combining the existing artificial heart valve and artificial heart pump into one, it has dual functions, which can not only maintain the one-way flow of blood, prevent the blood from flowing backward, but also increase the pressure of blood, assist the failing ventricle, and maintain normal circulation. blood pressure;

(2) It has the same shape and size as the heart valve, and is placed at the same position as the heart valve, without requiring additional anatomical space.

(3) There is no bearing in the pump, and the rotor relies on the liquid film to reduce the friction with the stator; the outer surface of the rotor is made of wear-resistant materials to prolong the use time.

Description of drawings

Fig. 1 is the structural representation of artificial heart valve pump of the present invention

Among them: 1. Stator coil and iron core; 2. Rotor magnetic steel; 3. Impeller; 4. Exit guide vane.

Detailed ways

As shown in Figure 1, the artificial heart valve pump of the present invention has the same shape and size as the heart valve, and it is made up of a stator 1 and a rotor 2, and the rotor 2 is in the stator 1, and the rotor 2 is composed of The magnetic steel around the impeller 3 and the impeller 3 are composed; the stator 1 is composed of coils, iron cores and guide vanes at the outlet, and the impeller 3 is made of ferromagnetic materials with surface coating, which also acts as a magnetic circuit role. When the coil is energized, the rotor rotates, driving the blood to rotate and flow axially, as shown by the arrow in Figure 1. The function of guide vane 4 is to eliminate the rotational component of blood flow and reduce the damage of blood.

In the embodiment of the present invention, the entire device weighs 40 grams, including 11 grams of rotor; the maximum outer diameter is 24.7 mm, and the length is 12.7 mm. In the diastolic period of the natural ventricle, the rotational speed needs to be 1500 rpm to maintain the aortic pressure of 80 mmHg; During natural ventricular systole, the rotor can produce a flow rate of 10 liters per minute at the same speed, and the blood pressure can reach 120 mmHg, in which the valve pump increases the blood pressure by 40 mmHg, that is, the ventricle unloads by 40 mmHg. The present invention is tested on animals in the First People's Hospital of Zhenjiang City, and it is proved that it is feasible to use it to replace heart valves and assist failed ventricles.

Claims (1)

1, artificial heart valve pump, it is characterized in that it has the shape and size identical with cardiac valve, it is made up of stator (1) and rotor (2), described rotor (2) is among the described stator (1), and this rotor (2) is by forming at impeller (3) magnet steel and impeller (3) on every side; Stator (1) is formed by coil, iron core with at the stator in exit, and impeller (3) is with there being the ferrimagnet of overlay coating to make.

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