CN101112628A - Miniature Implantable Axial Heart Assist Blood Pump - Google Patents

Abstract

Translated fromChinese

本发明公开了一种微型可植入轴流式心脏辅助血泵，它由机匣、固定在机匣上的线圈、固定在机匣内的轴、安装在轴外面的永磁体、安装在永磁体外面的转子叶轮和安装在轴上的定子叶轮构成。当固定在机匣外壁上的线圈通电后，线圈产生磁场；在该磁场与永磁体的相互作用下，永磁体带动转子叶轮一起旋转，血液从进口端流入从出口端流出，产生需要的流量和压力，从而部分或者全部代替自然心脏的功能。本发明的特点是：体积小，结构简单，加工成本低；控制系统简单，运转稳定，血液有形成分破坏小，各种并发症少；可植入人体内；耗能小，无需连接较长的管道。

The invention discloses a miniature implantable axial-flow heart assist blood pump, which consists of a casing, a coil fixed on the casing, a shaft fixed in the casing, a permanent magnet installed outside the shaft, a permanent magnet installed on the The rotor impeller outside the magnet and the stator impeller mounted on the shaft. When the coil fixed on the outer wall of the casing is energized, the coil generates a magnetic field; under the interaction between the magnetic field and the permanent magnet, the permanent magnet drives the rotor impeller to rotate together, blood flows in from the inlet end and flows out from the outlet end, generating the required flow and Pressure, thereby partially or completely replacing the natural heart function. The characteristics of the present invention are: small size, simple structure, low processing cost; simple control system, stable operation, less damage to formed components of blood, less various complications; can be implanted in the human body; low energy consumption, no need for long connection pipeline.

Description

Miniature implantable axial flow type assistant blood pump for heart

Technical field

The present invention relates to a kind of assistant blood pump for heart that can partly or completely replace the nature cardiac function, specifically, the present invention relates to a kind of minisize axial-flow formula assistant blood pump for heart in can implant into body.

Background technology

Clinically, the patient for heart failure need treat by artificial mechanical's auxiliary device usually.Main heart assistance therapy equipment at present has centrifugal pump and pulsate pump.Existing heart assistance therapy equipment in home and abroad such as pulsate pump and centrifugal pump mainly are non-implantation auxiliary blood pumps, and its inherent disadvantage is: volume is big, and pipeline is long, the control system complexity, and energy consumption is big, and corresponding complication is many.For example: the patient can not voluntary activity, easily forms thrombosis, and the mechanical system fault is many, has seriously influenced the clinical therapeutic efficacy of heart pump.

Summary of the invention

In order to overcome big, the drawback such as can not implant of existing heart-assist device volume, the purpose of this invention is to provide the axial flow type assistant blood pump for heart in a kind of miniature human implantable.

For achieving the above object, the present invention is by the following technical solutions: a kind of Miniature implantable axial flow type assistant blood pump for heart, it by casing, be fixed on coil on the casing, be fixed on the axle in the casing, a permanent magnet that is installed in the axle outside, the impeller of rotor that is installed in the permanent magnet outside and the stator impeller that is installed on the axle and constitute.

Described permanent magnet is positioned at the inside of impeller of rotor, with the impeller of rotor interference fit, and moves with impeller of rotor.

Described stator impeller by bearing fixing on axle, interference fit between bearing and the stator impeller.

Described coil stationary and does not have relative motion with casing on the outer wall of casing, and interference fit between the casing.

Two ends at described axle are separately installed with the stator impeller, and described impeller of rotor is installed between two stator impellers.

Advantage of the present invention: volume is little, and is simple in structure, and processing cost is low; Control system is simple, and running is stable, and blood formed element destroys little, and various complication are few; Human implantable; It is little to consume energy, and need not to connect the longer pipe road.

Description of drawings

Fig. 1 is a perspective view of the present invention;

Fig. 2 is a cross-sectional view of the present invention;

Fig. 3 is an axial side view of the present invention.

The specific embodiment

As Fig. 1～shown in Figure 3, Miniature implantable axial flow type assistant blood pump for heart disclosed by the invention mainly bycasing 1, be fixed oncoil 2 on the casing, be fixed onaxle 3 in the casing, be installed in thepermanent magnet 4 ofaxle 3 outsides, thestator impeller 6 that is installed in the impeller ofrotor 5 ofpermanent magnet 4 outsides and is installed inaxle 3 two ends constitutes.

In specific embodiments of the invention,permanent magnet 4 is positioned at the inside of impeller ofrotor 5, with impeller ofrotor 5 are interference fit, and move with impeller ofrotor.Stator impeller 6 is fixed on theaxle 3 bybearing 7, also is interference fit between bearing and thestator impeller.Coil 2 is fixed on the outer wall ofcasing 1, and withcasing 1 no relative motion, with casing also be interference fit.

Aftercoil 2 energisings that are fixed oncasing 1 outer wall (coil is by the external direct current power supply power supply),coil 2 produces magnetic field; Under the interaction of this magnetic field andpermanent magnet 4, permanent magnet drives impeller of rotor and rotates together, and shown in the direction of arrow among Fig. 1, Fig. 2, blood flows into from entrance point and flows out from the port of export, produce the flow and the pressure that need, thus the function of some or all of replacement nature heart.

Advantage of the present invention:

1, volume is little, and is simple in structure, and processing cost is low; Control system is simple, and running is stable, and blood formed element destroys little, and various complication are few.

Because permanent magnet of the present invention is positioned at the inside of impeller of rotor, reduced the volume of blood pump; And, because the present invention is by the interaction between magnetic field, make the impeller of rotor rotation in the blood pump, thereby make blood flow, so control system of the present invention is simple, running is stable, has avoided because volume is big, the generation of the complicated various complication of bringing of control system.

2, human implantable.

Because volume of the present invention is little, control system is simple, and it is reliable and stable to turn round, so can be easily by in the operation implant into body.

3, power consumption is little, need not to connect the longer pipe road.

The above is specific embodiments of the invention and the know-why used, and is any based on the equivalent transformation on the technical solution of the present invention basis, all belongs within the protection domain of the present invention.

Claims (5)

Translated fromChinese

1.一种微型可植入轴流式心脏辅助血泵，其特征在于：1. A miniature implantable axial-flow cardiac assist blood pump, characterized in that:它由机匣、固定在机匣上的线圈、固定在机匣内的轴、安装在轴外面的永磁体、安装在永磁体外面的转子叶轮和安装在轴上的定子叶轮构成。It consists of a casing, a coil fixed on the casing, a shaft fixed in the casing, a permanent magnet mounted outside the shaft, a rotor impeller mounted outside the permanent magnet, and a stator impeller mounted on the shaft.2.根据权利要求1所述的微型可植入轴流式心脏辅助血泵，其特征在于：所述永磁体位于转子叶轮的内部，与转子叶轮过盈配合，并与转子叶轮一起运动。2 . The miniature implantable axial-flow cardiac assist blood pump according to claim 1 , wherein the permanent magnet is located inside the rotor impeller, has an interference fit with the rotor impeller, and moves together with the rotor impeller.3.根据权利要求1或2所述的微型可植入轴流式心脏辅助血泵，其特征在于：所述定子叶轮通过轴承固定在轴上，轴承与定子叶轮之间过盈配合。3. The miniature implantable axial-flow cardiac assist blood pump according to claim 1 or 2, characterized in that: the stator impeller is fixed on the shaft through a bearing, and the bearing and the stator impeller are in interference fit.4.根据权利要求3所述的微型可植入轴流式心脏辅助血泵，其特征在于：所述线圈固定在机匣的外壁上，且与机匣无相对运动，与机匣之间过盈配合。4. The miniature implantable axial-flow cardiac assist blood pump according to claim 3, characterized in that: the coil is fixed on the outer wall of the casing, and has no relative movement with the casing, and passes between the casing and the casing. surplus cooperation.5.根据权利要求4所述的微型可植入轴流式心脏辅助血泵，其特征在于：在所述轴的两端分别安装有定子叶轮，所述转子叶轮安装在两个定子叶轮之间。5. The miniature implantable axial-flow cardiac assist blood pump according to claim 4, characterized in that: stator impellers are respectively installed at both ends of the shaft, and the rotor impeller is installed between the two stator impellers .

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