CN1288757A - Permanent magnetic heart assisting pump - Google Patents

Abstract

The permanent magnet auxiliary pump for heart includes rotor member and stator member, said rotor member is embedded into the internal diameter of aorta, and the stator member is placed outside of ribs of human body. The described rotor member comprises rectification head, reinforcing ring, supporting web, permanent-magnet blade wheel, spindle and flap group, and the stator comprises toothed and grooved silicon-steel sheets which are superimposed and equipped with embedded multi-phase windings. By utilizing reasonable arragement of stator member and rotor member it has no need of leading wire from interior of human body to reduce abiotic introduction, convenience patient and further reduce production of complicating disease.

Description

Permanent magnetic heart assisting pump

The present invention relates to a kind of pump installation of supporting heart, particularly relate to a kind of permanent magnetic heart assisting pump.

As everyone knows, the major physiological function of heart is as blood pump, constantly the blood that flows back to heart is pushed Arterial system, to keep blood circulation, heart is one of the easiest impaired organ in whole body, and along with the prolongation of human longevity, the probability of heart damage also suddenly increases.As the most important sick heart disease of planting that threatens human health, pumping function depletion and forfeiture are the most serious stages of its development, directly threaten people's life.At this situation, people have carried out positive exploration to this type of disease, are shaped from myocardium dynamic property, and the cardiac muscle excision has been attempted every method up to heart transplantation.In recent years, heart transplantation is than successful technology, but the effect of dirty transplanting has been subjected to the permanent immunity inhibition, the serious restriction of factors such as opportunistic infection, the patient of some foreign body coronary artery pathological changes needs to carry out once more heart transplantation in several years, in addition, the famine of donor has also limited this broad application, and people also carry on a shoulder pole and disturb the infection problems that some reverses sick plain leap species barrier simultaneously.In recent years, developed again and the similar blood pump of natural heart working principle, be all natural imitation hearts and designing of its structure and operation principle, their core texture is all the blister cavities that is surrounded by a flexible material, blister cavities is the same with the chambers of the heart of natural heart, be used for containment blood, the two ends, chamber connect into, delivery channel, and place one-way cock (i.e. " lobe ") respectively to guarantee the blood one-way flow at two seams, the intracavity volume was forced to change when the blister cavities wall was imposed external force, blood flowed out from outlet when volume reduced, then admit the blood of inflow during increase, so go round and begin again, finish blood-pumping function, very similar to the work of natural heart, this class formation is called " barrier film " formula blood pump.Initial membrane pump adopts gas-powered, promptly utilizes alternation air pressure in the air chamber to change wherein blister cavities volume, but because driving gas must be introduced through different pipe by external, thereby can't realize the target implanted fully.Subsequently, people have developed the electrodynamic type membrane pump again, promptly periodically oppress haematodocha and realize power conversion by electric magnet or micromotor, yet along with the continuous prolongation of the time of implantation and the accumulation of clinical observation material, this class formation progressively exposes some shortcomings that are difficult to overcome, for example: volume is big, complex structure, energy consumption height, to the material performance requirement harshness, physiological compatibility is poor, efficient is low, working life is short, control system complexity etc.Therefore people have developed the wheeled blood pump of pivoting leaf again on this basis, the defeated pump of leaf can be divided into centrifugal pump, three kinds of forms of axial-flow pump and mixed-flow pump, quovis modo all are the impeller-driven liquid one-way flow of placing at a high speed with in the pump case, do not need one-way cock control liquid stream method.From the operation principle of this sickle pump as can be seen, impeller speed can design very highly, make the power of output in the unit volume very big, therefore pump volume can be reduced to very little, moreover blood continuous-flow, do not need to be arranged on the haemocoele of relaxing period containment blood, so the pump housing can further dwindle even can accomplish microminiaturization, these characteristics are very beneficial for improving the dissection compatibility of device, in addition, owing to there is not folding flexible material, the continuous operation life-span of pump also will be improved largely, also has high efficiency in addition, low energy consumption, reliable operation, advantages such as good stability are so adopt when being suitable for forever implanting.CN1168263 has disclosed a kind of technology of power aortic valve, it is that artificial mechanical's arteries and veins valve is combined with left heart assist circulation, make it have the function of aortic valve, has the auxiliary function of left scheming tool again, its whole mechanical part is mainly by rotor, advance wheel and stator etc. partly to form, its technical scheme is to adopt the medical material that has embedded permanent magnet to make the rotor of " water droplet " shape, this rotor is inserted in the aorta together with bearing and supporting member, stator adopts high permeability material to make, embedded winding, be " semi-cylindrical shaped ", place outside the aorta endwall, its winding links to each other with power supply outside the lead lead body and through external portable controller, regulate the rotating speed of rotor by the size of control stator current, it is basic identical that this power lobe method for posting and general " aortic valve " are changed the lobe art, although this kind blood pump has saved " pump case ", directly utilize arterial wall to be pump case, avoided the introducing of many non-biological material and the blood of inanimate to contact, but being stator, the shortcoming of this blood pump needs with lead by drawing in the human body, in addition owing to used member such as bearing, make the hemocyte meeting in the member of these high speed rotating in the blood broken, cause blood destroyed, lead to complications.

Purpose of the present invention overcomes the deficiencies in the prior art exactly, a kind of follow-on permanent magnetic heart assisting pump is provided, by reasonably disposing stator and rotor, need not in human body, to draw lead again, thereby reduced the introducing of non-biological material more, simultaneously also make things convenient for patient, further reduced complication.

The objective of the invention is to realize by following technical proposals, permanent magnetic heart assisting pump of the present invention comprises rotor component and stator component two parts, wherein rotor component is by the rectification head, stiffening ring, supporting rib, permanent magnetism vane type runner and axle and lobe skirt are formed, one end of supporting rib is fixed on the rectification head, the other end is fixed on the stiffening ring, one end of axle inserts in the rectification head, equipped with permanent magnetism vane type runner on the axle, described its blade of permanent magnetism vane type runner is made by the permanent magnet material of covering medical material outward, shape in the shape of a spiral, be configured on the cylinder of a foraminous nonmagnetic substance in center, circular flap skirt by the macromolecular material braiding wraps on the stiffening ring, and this rotor component embeds Ad; Above-mentioned stator component is by the silicon steel plate packing that dashes tooth and groove of molding and is embedded with polyphase windings, this stator is " U " shape and is placed on the rotor component of being placed in the outer and heart of (riding over) human body rib and is in equal height, the winding of stator is connected in controller and power supply, by control stator current frequency and the size with control rotor speed.Operation principle of the present invention be permanent magnetic heart assisting pump rotor component the rotating excitation field that produces of the inherent magnetic field that externally shows and stator component interact and produce torque, make permanent magnetism vane type runner high speed rotating, the permanent magnetism blade just pumps blood, plays the effect of cardiac pumping.Need not current excitation during p-m rotor work.

It is by material manufacture such as titanium alloy or rustless steels that above-mentioned blade can be leafy spiral, above-mentioned rectification head, supporting rib, stiffening ring and axle.Described permanent magnetism blade is magnetized along the thickness direction of blade, one positive one instead changes in turn along the direction of magnetization of circumferencial direction blade

Advantage of the present invention is thoroughly to have solved to need to pass through the problem that body cavity draws power supply with lead after blood pump is inserted human body, has eliminated because lead-in conductor is given a series of disadvantages that heart, blood brought, and patient's life span is prolonged, and life quality improves; The permanent magnetism blade had both played the effect of magnet rotor, and again as the blade of pump blood, a thing and dual-purpose have been simplified the structure of rotor component greatly, have reduced the volume of whole device again.

Below in conjunction with accompanying drawing structure of the present invention is described in further detail, only makes an explanation among the figure, be not restricted to invention as embodiment, wherein:

Fig. 1 is the application sketch map of permanent magnetic heart assisting pump of the present invention;

Fig. 2 is the sketch map of the rotor component of permanent magnetic heart assisting pump of the present invention;

Fig. 3 is the vertical view of Fig. 2.

Now referring to accompanying drawing 1-3, permanent magnetic heart assisting pump of the present invention can be inserted human heart, and it can support heart, perhaps fully replaces the pumping function of heart.Permanent magnetic heart assisting pump of the present invention comprises rotor component A and stator component B, rotor component A is embedded in the intravital aorta of people, and stator component B is placed on outside the human body rib, as shown in Figure 1, wherein rotor element is by rectification 1, stiffening ring 5, supporting rib 2, permanent magnetism vane type runner 4, form with axle 6 and lobe skirt 7, as shown in Figure 2, one end of supporting rib 2 is fixed in the rectification 1, the other end is fixed on the stiffening ring 5, one end of axle 6 inserts in the rectification 1, equipped with permanent magnetism vane type runner 4 on the axle 7, magneto runner 4 its blades 3 are made by the permanent magnet material of covering medical material outward, shape is configured on the cylinder of a foraminous nonmagnetic substance in center in the shape of a spiral.Described stiffening ring 5 is by circular flap skirt 7 parcels by the macromolecular material weaving; Above-mentioned stator component B is by the silicon steel plate packing parcel that dashes tooth and groove of molding and is embedded with polyphase windings, this stator component B is " U " shape and is placed on outside (riding over) human body rib and the rotor component A co-altitude of being placed in the heart, the winding of stator component B is connected in controller and power supply, by controlling the frequency and the rotating speed of size of having decided member B electric current with the runner 4 of control rotor component A, can change the rotating speed of runner 4 like this according to patient's situation needs, required blood liquid flux is provided.

The permanent magnetism vane type runner that the outstanding feature of the present invention is arranged on the power lobe in the body is to be controlled by body Outer stator rotating excitation field and being driven in rotation need not to draw lead, conduit etc. various zero like this in human body Part has further improved the function of blood pump. Reduce fault, improve patient's life quality. The permanent magnetism blade is held concurrently The rotor field of generation and pump blood function are arranged, thereby make rotor component simple in structure, volume-diminished.

Claims (2)

1, a kind of permanent magnetic heart assisting pump, it comprises rotor component and stator component, it is characterized in that described rotor component is made up of rectification head, stiffening ring, supporting rib, permanent magnetism vane type runner, axle and lobe skirt, one end of described supporting rib is fixed on the rectification head, the other end is fixed on the stiffening ring, one end of axle is inserted in the rectification head, its blade of equipped with permanent magnetism vane type runner is made by the permanent magnet material of covering medical material outward on the axle, and shape is configured on the cylinder of a foraminous nonmagnetic substance in center in the shape of a spiral.Above-mentioned stiffening ring is by the circular flap skirt parcel by the macromolecular material weaving, and this rotor component embeds Ad; The said stator member is by the silicon steel plate packing that dashes tooth and groove of molding and is embedded with polyphase windings, this stator component be " U " and place (riding over) human body rib outer and with heart in the rotor component co-altitude placed, the winding of stator is connected in controller and power supply and the frequency by the control stator current and size revolution and then the control blood-pumping function with the control rotor.

2, permanent magnetic heart assisting pump according to claim 1 is characterized in that described permanent magnetism blade is one positive one instead to change in turn along the magnetized direction of magnetization along the circumferencial direction blade of the thickness direction of blade.

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