CN208785413U - Heart analog machine - Google Patents

Abstract

The utility model discloses a kind of heart analog machines.The heart analog machine includes: chamber, the chamber is configured as variable volume, the chamber has entrance and exit, and the entrance is configured to flow into liquid in the chamber from outside, and the outlet is configured to that liquid is made to flow out to outside from the chamber；Beating component, the beating component is configured to expand or shrink the volume of the chamber, and when component of beating expands the volume of chamber, the chamber sucks liquid from the entrance, when component of beating reduces the volume of chamber, the chamber pumps out liquid from the outlet；The beating component is configured as: to the reduction volume of the volume of the chamber, accounting for the 10%-90% for the maximum volume that beating component is expanded to chamber.

Description

Heart analog machine

Technical field

The utility model belongs to field of medical device, and specifically, the utility model relates to a kind of heart analog machines.

Background technique

Heart disease be always be difficult to cure, the higher disease of the death rate.In recent years, the patient populations for suffering from heart disease increase Add, heart disease has become one of the important diseases for influencing human health.In heart disease, heart failure is to patient The maximum illness of life threat.All kinds of heart diseases are finally likely to cause heart failure.

Although heart failure can be controlled to a certain extent, can not eradicate.If it is desired to obtain permanent Treatment, can only by heart transplant or use cardiac assist devices.Heart transplant needs to find suitable heart, difficulty compared with Greatly.In recent years, it is increasingly becoming the optinal plan for the treatment of heart failure by mechanical-assisted recycle unit, is expected to gradually develop to control Treat the non-permanent treatment means of heart failure.

Existing ventricle auxiliary blood pump is mainly flat flow blood pump according to blood supply mode.Common flat flow blood pump packet Include centrifugal and axial-flow type ventricle auxiliary blood pump.These flat flow blood pumps are all made of blade rotation and mention as dynamic mode for blood For the power of flowing.But since the shear stress that blade high speed rotation generates has very strong break to haemocytes such as red blood cells Bad power, it is easy to form thrombus, cause apoplexy, the serious consequences such as multiple organ failure.

On the other hand, the patient of heart failure is often accompanied by the illness of cheyne-stokes respiration.Even if being used in patient mechanical auxiliary After helping recycle unit, it is possible to there is cheyne-stokes respiration illness.

As it can be seen that there is also more defects for existing cardiac assist devices, it is necessary to be improved to cardiac assist devices.

Utility model content

One purpose of the utility model is to provide a kind of new solution of heart analog machine.

It is according to the present utility model in a first aspect, providing a kind of heart analog machine, comprising:

Chamber, the chamber are configured as variable volume, and the chamber has entrance and exit, and the entrance is configured as Liquid can be made to flow into the chamber from outside, the outlet is configured to that liquid is made to flow out to outside from the chamber；

Beating component, the beating component are configured to expand or shrink the volume of the chamber, when beating component expands When the volume of big chamber, the chamber sucks liquid from the entrance, when component of beating reduces the volume of chamber, the chamber Liquid is pumped out from the outlet；

The beating component is configured as: to the reduction volume of the volume of the chamber, accounting for beating component is expanded to chamber Maximum volume 10%-90%.

Optionally, the heart analog machine includes containment member, and the chamber is located inside the containment member, described Entrance and exit is arranged on the containment member, and the chamber is connected to by the entrance and exit with exterior space respectively.

Optionally, the containment member includes cylinder body, and one end of the cylinder body is closed end, and the beating component protrudes into cylinder It is slidingly sealed in vivo and with the inner wall of cylinder body, the chamber is located at from the beating component to the region sealed end, described Beating component is configured to slide in cylinder body.

Optionally, flexible glue film, the edge seal connection of the flexible glue film are provided between beating component and the sealed end On the containment member, the region encapsulated between the flexible glue film and sealed end is as the chamber.

Optionally, the containment member includes cover board, and the cover board is enclosed in one end of the cylinder body, forms the closing End.

Optionally, the entrance and exit is arranged on the cover board；

Alternatively, the entrance and exit is arranged on the cylinder body.

Optionally, the containment member includes cover board, and the cover board is enclosed in one end of the cylinder body, forms the closing End,

The edge of the flexible glue film is connected on the inner wall of the cylinder body；

Alternatively, the edge of the flexible glue film is connected on the cover board.

Optionally, the inlet is provided with access flap valve mechanism, and access flap valve mechanism is configured to only allow liquid Body is externally entering the chamber, and the exit is provided with Zhun Chu flap valve mechanism, and Zhun Chu flap valve mechanism is configured as only Liquid is allowed to flow out to outside from chamber.

Optionally, the reduction volume accounts for the 40%-50% for the maximum volume that beating component is expanded to chamber；

Alternatively, the reduction volume accounts for the 55%-70% for the maximum volume that beating component is expanded to chamber.

Optionally, the beating component is piston, and the heart analog machine further includes rotating machine and link assembly, described Link assembly and the piston constitute crank link mechanism, and the rotating machine is connect with the link assembly, when the rotating machine When rotation, the piston is configured to move reciprocatingly in the cylinder body.

Optionally, connecting hole is distributed on the link assembly, the connecting hole is pivotally connected for the connecting rod of link assembly.

The utility model inventors have found that in the prior art, those skilled in the art are while it is recognized that heart point This concept of clock output quantity, but be not found the diastole end volume of heart, shrink last volume, often the amount of fighting, penetrate blood system Number, heart rate functional parameter have important interrelated effect for blood circulation and breathing.If cardiac assist devices cannot At least provide ejection fraction similar with heart, it is also possible to cause the intracorporal dizzy of people, in turn result in cheyne-stokes respiration etc. Illness.And the inventors found that relevance therein, and provide a kind of heart analog machine.Heart simulation is set For other than realizing traditional equipment and adjusting unit time transport blood volume (cardiac output), can also at least realize to ejection fraction High simulated conditions under regulation and control.In the high bionical form of height, the ejection fraction of normal or abnormal heart is simulated Etc. indexs.Therefore, the technical assignment to be realized of the present invention or the technical problem to be solved is that those skilled in the art from It is not expecting or it is not expected that, therefore the utility model is a kind of new technical solution.

By the detailed description referring to the drawings to the exemplary embodiment of the utility model, the utility model it is other Feature and its advantage will become apparent.

Detailed description of the invention

It is combined in the description and the attached drawing for constituting part of specification shows the embodiments of the present invention, and And together with its explanation for explaining the principles of the present invention.

Fig. 1 is the structural schematic diagram for the heart analog machine that a kind of embodiment of the utility model provides；

Fig. 2 is the structural schematic diagram for the heart analog machine that the utility model another embodiment provides；

Fig. 3 is the structural schematic diagram for the heart analog machine that the utility model another embodiment provides.

Specific embodiment

The various exemplary embodiments of the utility model are described in detail now with reference to attached drawing.It should also be noted that unless another It illustrates outside, the component and the positioned opposite of step, numerical expression and numerical value otherwise illustrated in these embodiments is unlimited The scope of the utility model processed.

Be to the description only actually of at least one exemplary embodiment below it is illustrative, never as to this is practical Novel and its application or any restrictions used.

Technology, method and apparatus known to person of ordinary skill in the relevant may be not discussed in detail, but suitable In the case of, the technology, method and apparatus should be considered as part of specification.

It is shown here and discuss all examples in, any occurrence should be construed as merely illustratively, without It is as limitation.Therefore, other examples of exemplary embodiment can have different values.

It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi It is defined in a attached drawing, then in subsequent attached drawing does not need that it is further discussed.

The utility model provides a kind of heart analog machine, which is functionally high bionical heart function It can analog machine.Which includes chambers and beating component.The volume of the chamber be it is transformable, can be used for simulating ventricle Contraction and diastolic action.The chamber has entrance and exit, and the entrance is for making liquid be flowed into the chamber from outside In room.The outlet is for making liquid flow out to outside from chamber.

The beating component is used to expand or shrink the volume of the chamber.For example, the beating component can be by turning Motivation structure, swing mechanism or contracting mechanism driving, so that the chamber be made to carry out out reciprocal contraction and expansion movement.In reality Application in, when it is described beating component controls described in chamber volume enlargement when, the chamber can be inhaled from inlet by blood Enter in chamber.And when stirring the smaller volume of chamber described in component controls, the blood in the chamber can be from the outlet Place is pumped out to outside.In this way, the heart analog machine can at least simulate contraction and the diastolic action of ventricle, the heart can be replaced Dirty ventricular structure.

Particularly, the utility model can change the diminution that beating component can be generated by the adjustment to beating component Amount.When component of beating carries out reduction operation to chamber, the reduction volume of cavity volume, which accounts for beating component, enables chamber to be expanded to Maximum volume 10%-90%.For example, if beating component can make the volume enlargement of chamber to 145ml, cavity volume The adjustable extent of reduction volume is 14.5ml-130.5ml.Different, the Yi Jisuo according to the corresponding ventricle of the heart analog machine The accounting of the abnormal heart of corresponding different situations, the reduction volume can be adjusted in the range of 10%-90%.

For example, for heart analog machine for the case where simulating normal ventricle, the reduction volume to be adjustable at accounting for The 40%-80% for the maximum capacity that chamber can be expanded to；It is used to simulate abnormal ventricle or only for heart analog machine The case where function of a part of ventricle is provided, the adjustable maximum capacity that can be expanded at chamber is accounted for of the reduction volume 10%-40% or 80%-90%.The utility model is limited not to this.

In addition, heart analog machine provided by the utility model can also be adjusted reduction volume to accounting for chamber maximum capacity 0%-100%.0%, heart analog machine described in the reduction volume of 1% and 99%, the 100% this limit also may be implemented, can To be applied to the special circumstances of simulation heart, the utility model is limited not to this.

Heart analog machine provided by the utility model can be used for simulating the feelings that ventricle has various different ejection fraction Condition.Either good ejection fraction regulating effect can be provided still in terms of clinical use in medical research.

Prior to be, the reduction volume can be adjusted to real heart and penetrate blood system by the heart analog machine The corresponding numerical value of number, to simulate the beating movement and ejection fraction of real heart.The utility model inventors have found that ventricle There are relevances for ejection fraction and human body triggering respiratory movement.Under normal conditions, people carries out primary complete respiratory movement, during which Have about 6 heartbeats movement.

The utility model inventors have found that when human body carries out primary " air-breathing " movement, pushed in cardiac pumping function Under, it is gradually increasing from oxygen of lung's followed by heart to from main artery in blood.It is crucial, in the preserved ejection fraction of left ventricle In the case of, left ventricle is pumped out to sensor-based system (arch of aorta, carotid body of human body from left ventricle after about beating three times Peripheral chemoreceptor) it can detect the rising (result of pulmonary aspiration) of oxygen in blood, to terminate current " air-breathing " movement, open Beginning " expiration " movement；In progress " expiration " movement, due to there is no oxygen sucking, contain from the oxygen in the blood pumped out in left ventricle Amount can be reduced gradually.The blood that left ventricle pumps out, which carries oxygen decline (lung expiration) signal, can reach main artery.At this point, human body is big The sensor-based system of artery can detect oxygen decline (lung expiration result) in blood that left ventricle pumps out, to terminate current " expiration " Movement starts " air-breathing " movement.Thus-exhale, exhale-switching at runtime inhaled is inhaled, in cycles, to realize human body continuous-stable Breathing.Crucial, in the case where the preserved ejection fraction of left ventricle, left ventricle after about beating three times, the blood that pumps out Oxygen content can reach high level.It recycles repeatedly.

The utility model inventors have found that the breathing and heartbeat of human body there are above-mentioned association operational relationship, and then are completed Breathing and the heartbeat movement of rule.Control the ejection fraction for being mainly characterized by ventricle of this incidence relation.If ejection fraction It is excessively high, it will cause the less number of ventricular beats, the oxygen content in blood has just reached high level or low value, has been likely to result in breathing Frequency rises.And if ejection fraction is too low, it will cause the more numbers of ventricular beats, the oxygen content in blood can be only achieved height Value or low value will cause respiratory rate decline.When more serious the case where ejection fraction reduces, it is possible to left ventricle can not be made to pump The oxygen content in blood out reduces to low value, so that " air-breathing " movement next time can not be triggered.As it can be seen that the ejection fraction of ventricle It is highly important condition in entire cardio-pulmonary function.

However, existing cardiac mechanical auxiliary circulation equipment can not embody the ejection fraction of heart, it is only lasting Blood is conveyed outward.This mode for persistently exporting blood ignores the incidence relation between heartbeat and breathing, can so having Can cause the disorder of nerve system of human body, can not triggered as normal respiratory movement, to cause the diseases such as disordered breathing, cheyne-stokes respiration Shape.

The utility model inventors realized that this problem, and then in cardiac assist devices provided by the utility model In embodied beating feature.Also, in a preferred embodiment, the reduction volume of chamber is limited in by heart analog machine Within the scope of 40%-80%, normal ventricular beat effect is preferably simulated to reach.

In the above-mentioned description to heartbeat, breath cycle, the normal ejection fraction of left ventricle is right between 55%-70% The normal ejection fraction of ventricle is between 40%-50%.So in a kind of preferred embodiment of the utility model, chamber The reduction volume of volume can account for the 40%-50% for the maximum volume that beating component is expanded to chamber, which corresponds to the heart Dirty analog machine simulation replaces the physiology normal condition of right ventricular function state.It is preferably implemented in the another kind of the utility model In mode, the reduction volume of cavity volume can account for the 55%-70% for the maximum volume that beating component is expanded to chamber, the implementation Mode corresponds to the physiology normal condition that the simulation of heart analog machine replaces left ventricular function state.

The ejection fraction of patient may be decreased 20%-30%, even lower under Heart Failure condition.The simulation of this heart The reduction volume of equipment is adjustable in the range of 10%-90%, can simulate all shapes instead of going out left ventricular function substantially State, the serious pathological physiological abnormalities limiting case including the above physiological normal condition and when heart failure.It is possible thereby to grind Study carefully left ventricular function the stateful influence degree to human body respiration function.

Heart analog machine of the invention in addition to realize adjust the unit time transport blood volume (cardiac output) function other than, It can also realize to diastole end volume, shrink last volume, often the physiologic functions index such as the amount of fighting, ejection fraction, heart rate Regulation and control under high simulated conditions.

Optionally, the heart analog machine may include containment member, and the containment member has inner cavity, and inner cavity is used for Constitute the chamber.The chamber can take up entire inner cavity, be also possible to occupy the partial region of inner cavity, the utility model is not This is limited.The inner cavity of the containment member can be base closed, only be provided with necessary be used for and the external world thereon Connected pore channel and opening for assembling other components.The entrance and exit is arranged on the containment member, the entrance The chamber is connected to exterior space respectively with outlet.

Optionally, the utility model gives a kind of embodiment, as shown in Figure 1, the containment member may include cylinder Body 31 has cylindrical or other shapes of inner cavity in the cylinder body 31.One end of the cylinder body 31 is closed end, the closing Be at end it is substantially that inner cavity is closed, be provided only with necessary functional duct or fitting opening.The beating component 2 is extend into In the inner cavity of the cylinder body 31, and the side for component 2 of beating is slidably and sealingly connected with 31 inner wall of cylinder body.The beating component 2 It can be slided in cylinder body 31, and keep sealing state with 31 inner wall of cylinder body.The chamber 1 be located at from the beating component 2 to In region between sealed end, it can be and fully take up this partial region, be also possible to make chamber 1 configured with other components Occupy a part of above-mentioned zone.In this way, the volume of the chamber 1 can occur when the beating component 2 slides in cylinder body 31 Change, to simulate the beating movement of ventricle.

It is further preferred that as shown in Figure 1, be also provided with flexible glue film 32 between the beating component 2 and sealed end, The edge seal of the flexible glue film 32 is connected on the containment member.In this way, being wrapped between the flexible glue film 32 and sealed end Envelope forms a piece of region substantially sealed off, and the region is as the chamber 1.The beating component 2 can directly with flexible glue film 32 connections, in this way, being able to drive flexible glue film 32 when component 2 of beating is mobile and generating deformation, to change the volume of chamber 1.When Sealing cooperation when so, due to the inner wall of the beating component 2 and cylinder body 31, so beating component 2 can not also be with flexible glue film 32 are directly connected to.Due to the effect of air pressure, when component 2 of beating moves in cylinder body 31, flexible glue film 32 can also generate deformation, chamber The volume of room 1 is changed.The advantages of configuring flexible glue film is that the blood for flowing into chamber can not directly be contacted with beating component. The gap matching relationship beaten between component and inboard wall of cylinder block, in its movement there is a possibility that haemocyte is impaired.Configured with flexible glue After film, haemocyte only flows in the space between flexible glue film and closed end, not will receive the damage of beating component.

Optionally, in a kind of embodiment of the utility model, as shown in Fig. 2, the cylinder body 31 will form closed end One end itself be opening.Correspondingly, the containment member can also include cover board 33.The cover board 33 is enclosed in the cylinder body On 31 end face, to form the closed end.The assembly and processing of heart analog machine itself are convenient in this structure design.? In other embodiments, as shown in Figure 1, the cylinder body 31, which itself is used to form one end of closed end itself, can be closing , then typically without additional setting cover board 33.Can according to actual production, use the case where, to the structure feature of cylinder body 31 into Row adjustment.

Further, in the embodiment that containment member includes cover board 33, the entrance and exit 12 can be opened up On the cover board 33, as shown in Figure 2.Alternatively, entrance and exit 12 also can be set on the cylinder body 31.It can be according to tool Requirement when body is implemented to product structure and performance selects.Fig. 1 then shows entrance in the case where no cover board 33 and goes out Mouth 12 is set up directly on the mode on cylinder body 31.

On the other hand optional, as shown in Fig. 2, in the embodiment that containment member includes cover board 33, the flexible glue film 32 edge can be directly sealedly connected on the cover board 33.Space between cover board 33 and flexible glue film 32 is as the chamber 1.Alternatively, the edge of the flexible glue film 32 can also be sealedly connected on the cylinder body 31.Can according to specific implementation when to production The requirement of product structure and performance is selected.The edge that Fig. 1 then shows flexible glue film 32 in the case where no cover board 33 directly connects Connect the mode on cylinder body 31.

The utility model, which is not intended to limit, to be set using cylinder body as this embodiment composition heart simulation of containment member It is standby.In other embodiments, the chamber can also be formed using other structures.For example, in one embodiment, it is described Chamber can be directly made of the inner space of elastomeric spherical container, and the beating component is then the outside for being clipped in spheroid, Beating movement is realized by clamping and loosening.Alternatively, in another embodiment, the chamber can be by box-like deformable machine Tool mechanism is constituted, and sealant is provided in box-like mechanism, for encapsulating blood.Box-like mechanism can do reciprocal deformed movement, It realizes the control to cavity volume, realizes beating movement.

Optionally, as shown in Figure 1, 2, the entrance is used to that blood to be made to enter in chamber 1, so, the inlet can To be provided with access flap valve mechanism.Access flap valve mechanism is configured to only allow liquid to be externally entering the chamber 1.This Kind flap valve mechanism can be bionical valve, be also possible to other devices, such as can limit the solenoid valve etc. of one-way flow, this reality It is limited with novel not to this.Correspondingly, Zhun Chu flap valve mechanism 121, the quasi- flap valve out are also equipped at the outlet 12 Mechanism 121 is configured to only allow liquid to flow out to outside from chamber 1.

In a kind of embodiment of the utility model, access flap valve mechanism and Zhun Chu flap valve mechanism be can be unidirectionally Flap valve.As shown in Figure 1, 2, at entrance 11, one end of unidirectional valve is connect with entrance inner wall, and the other end of unidirectional valve is certainly By holding.Be provided with gear edge on the inner wall of entrance 11, gear along can prevent the free end of unidirectional valve to moving on the outside of entrance.This Sample, the unidirectional valve of the inlet are configured as only allowing liquid, blood to chamber indoor moveable.Correspondingly, in the outlet Gear edge is also equipped on 12 inner wall, the gear is used along that can prevent medial movement of the free end of unidirectional valve to outlet Unidirectional valve at mouthful is configured as that liquid, blood can only be allowed to flow to outside chamber.

In the embodiment for forming chamber 1 using cylinder body 31, as shown in Figure 1, 2, the beating component 2 is preferably lived Plug.Correspondingly, the heart analog machine can also include rotating machine and link assembly 41, the link assembly 41 and the work Plug constitutes crank link mechanism.The rotating machine is connect with the link assembly 41.When rotating machine rotation, the connecting rod Spinning movement can be converted into moving along a straight line by component 41, and the piston is driven to move reciprocatingly in cylinder body 31.Make chamber 1 Volume can shrink repeatedly, expand.The rotational frequency of the rotating machine is the Beating Rate of heart analog machine.In Fig. 1 institute In the case of showing, during the piston is in the expansion chamber 1；In situation shown in Fig. 2, the piston is in chamber 1 narrows down to the smallest state.

Optionally, as shown in Figure 1, 2, can also have connecting hole 42,42 edge of connecting hole on the link assembly 41 The link assembly 41 extend distribution.The connecting hole is pivotally connected for two connecting rods of link assembly.Shown in Fig. 1,2 In embodiment, two connecting rods in the link assembly 41 are that end is connected, in this way, when rotating machine rotates, beating component 2 Difference between extreme lower position and extreme higher position is larger, and the reduction volume of generation is bigger, and the maximum capacity of chamber is also bigger.? In other embodiments, two connecting rods can also be pivotally connected by the connecting hole 42 of different location.By adjusting two companies The link position of bar, can the parameters such as capacity, reduction volume to the chamber of heart analog machine be adjusted, to be adapted to simulate The ventricle of different function state, different capabilities.

In addition, in the embodiment shown in Fig. 1,2, can also by adjusting link assembly center of rotation in cylinder body Rigging position, adjust the maximum capacity of the chamber.For example, Fig. 1, the lower end of link assembly 41 is connected to rotating machine in 2 On, if the lower end and rotating machine are integrally moved up, the maximum capacity of the chamber can be reduced.Opposite, if The lower end of the link assembly and rotating machine are integrally moved down, then will increase the maximum capacity of the chamber.The cylinder The regulating mechanisms such as track or center of rotation pilot hole can be set on body 31, for link assembly and its center of rotation and The position of rotating machine is adjusted.For example, the center of rotation and rotating machine of link assembly can slide along the track, to adjust The position of center of rotation；Alternatively, the output shaft of rotating machine can be inserted in center of rotation pilot hole at different locations, to adjust Save the position of center of rotation.

Certainly, the utility model is not intended to limit can only be used as beating component using piston.In other embodiments, such as It can also be using components such as pneumatic shuttle, hydraulic device, clamping devices as power source, to drive heart analog machine to carry out Beating movement.

In a kind of embodiment of the utility model, the beating component 2 can be hydraulic device.As shown in figure 3, In the embodiment, flexible glue film 32 is provided in the cylinder body 31, the flexible glue film 32 is for the upper area shape with cylinder body 31 At chamber.The lower end of the cylinder body 31 is closed, such as can fasten closing or the lower end of cylinder body itself by closed plate It is exactly enclosed construction, the utility model is limited not to this.Particularly, the region of the flexible glue film 32 to 31 lower end of cylinder body is Pressure chamber 35.The beating entrance 34 for entering and flowing out for pressure liquid stream is offered on pressure chamber 35.The hydraulic device is preferred It can be set except the cylinder body 31, pressure fluid can be pumped into the pressure chamber 35 by hydraulic pump by the hydraulic device In；Also, the pressure pump can extract pressure fluid out from pressure chamber 35.

Since flexible glue film 32 has deformability, so after pressure fluid is persistently filled with pressure chamber 35, flexible glue film 32 Can be upwardly-deformed by hydraulic action, to reduce the space of the chamber 1.Flow the liquid in chamber 1, blood from outlet 12 Out.On the contrary, the flexible glue film 32 will receive hydraulic action and deform downwards when hydraulic device extracts pressure fluid out outward, thus Increase the space of the chamber.The liquid outside the entrance 11, blood is set to be drawn into the chamber 1.Using hydraulic dress It sets and is that liquid is difficult to be compressed as the advantages of beating component, so pressure can be filled with or is sucked out by controlling pressure fluid The amount of chamber is accurately controlled the capacity of the chamber, output and reduction volume.The amount of liquid in charged pressure chamber with The amount of liquid put out from chamber is almost the same.In the case where heart analog machine is used to substitute the application environment of normal heart, using liquid Pressure device as beating component can be more reliable guarantees chamber capacity accuracy, reduction due to capacity, the exception of output Caused dysfunction phenomenon.

Optionally, a beating entrance 34 can be only offered on the pressure chamber 35, pressure fluid passes in and out the pressure Chamber 35 all passes through this beating entrance 34.Alternatively, beating entrance and beating outlet can also be opened up respectively, it is respectively used to press Power liquid charged pressure chamber and extraction pressure chamber.

In another embodiment, the hydraulic device can be without draw out operation.Correspondingly, on the pressure chamber Venthole can individually be offered.When needing to reduce the pressure in the pressure chamber, the venthole is opened, by pressed gas Release, to reduce the pressure of pressure chamber.

Further, the speed when hydraulic device can also be to pressure fluid pump-in pressure chamber controls, feed liquor speed Degree influences whether the pressure size in pressure chamber.

In the another embodiment of the utility model, the pulsating device 2 is pneumatic shuttle.Using pneumatic shuttle In embodiment as beating component, the overall structure of the heart analog machine is close with structure shown in Fig. 3, so this Embodiment is still with the structure of Fig. 3 signal heart analog machine.In this embodiment, it is also required to be provided in the cylinder body 31 Flexible glue film 32.The lower end of cylinder body 31 be it is closed, the region of the flexible glue film 32 to 31 lower end of cylinder body is pressure chamber 35.It is similar , the beating entrance 34 for being filled with and releasing for pressed gas is offered on the pressure chamber 35.The pneumatic shuttle can be set It sets except the cylinder body 31, pneumatic shuttle can be by devices such as air pumps by pressed gas charged pressure chamber 35；Or it will pressure Strength body is extracted out from pressure chamber 35.

It is similar with using the embodiment of hydraulic device, cause pressure when continuing charged pressure gas into pressure chamber 35 When rising, flexible glue film 32 can be upwardly-deformed by gas pressure, compresses the space of the chamber, make liquid in chamber 1, blood from 12 outflow of outlet.Opposite, when pneumatic shuttle extracts pressed gas out outward, flexible glue film 32 is deformed downwards by suction function, from And the space of chamber is increased, so that liquid, blood is pumped into chamber 1 from the entrance 11.

In another embodiment, the pneumatic shuttle can be without air suction process.Correspondingly, on the pressure chamber Venthole can individually be offered.When needing to reduce the pressure in the pressure chamber, the venthole is opened, by pressed gas Release, to reduce the pressure of pressure chamber.

It is that pneumatic shuttle belongs to pressure control as the advantages of beating component using pneumatic shuttle.Due to the chamber In have certain pressure, when pneumatic shuttle is by pressed gas pump-in pressure chamber 35, flexible glue film 32 will not generate immediately deformation and press Contract the chamber.Compressed phenomenon can first occur in pressed gas.When the air pressure of pressed gas in pressure chamber 35 is greater than in chamber Pressure after, pressed gas just can make flexible glue film 32 upwardly-deformed, compress the space of the chamber.When pneumatic shuttle is by pressure gas When body is sucked out, first there is the case where volume expansion, pressure reduction in the meeting of pressed gas.Then, then in pressure chamber 35 it generates negative Pressure deforms flexible glue film 32 downwards.The compression of pressed gas and expansion process can to chamber 1 put out and suction action is formed Pressure buffer, the blood pressure of the outlet and inlet that make chamber are able to maintain in pressure appropriate, are not in that pressure increases suddenly Or the phenomenon that reducing suddenly.Further, the speed when pneumatic shuttle can also be to pressed gas pump-in pressure chamber carries out Control, intake velocity influence whether the pressure size in pressure chamber.It, can be defeated by pneumatic shuttle by the control to intake velocity Pressure size out is limited in a predetermined value, which is the safe blood pressure upper limit value in the exit of chamber.If chamber And its blood pressure of outlet has reached predetermined value, then pneumatic shuttle can not the further charged pressure gas into pressure chamber 35, avoid The blood pressure of outlet is further up, improves safety.

In addition, the exit or outlet outside can also be set in a kind of optional embodiment of the utility model It is equipped with pressure monitoring device.The pressure monitoring device is configured as forming circuit connection with beating component, or passes through control The transmitting of module realization signal control signal.The pressure monitoring device is configured for the blood in detection exit or outlet outside Pressure.If monitoring hyperpiesia, safe range is had exceeded, then the alarm signal of hyperpiesia can be sent to beating portion Part；Alternatively, alarm signal can be sent to control module, the control module sends signal to beating component again.It is described to fight Dynamic component is then configured to, and after receiving from the alarm signal of pressure monitoring device or control unit, can be stopped or be slowed down pair Blood puts out movement in chamber；Alternatively, the execution for putting out movement can also be postponed.In this way, the pressure at the chamber outlet Or blood pressure can be eased, and avoid blood pressure beyond safe range, cause damages.

Heart analog machine provided by the utility model pumps out liquid or blood by the way of pulsation type output, can The preferably blood supply rule of simulation normal heart.It is smaller to the destruction of haemocyte.Important, the heart simulation of the utility model is set The standby concept for introducing ejection fraction, controls the reduction volume of chamber, so that reduce that adverse reaction occurs in human body can It can property.

Although being described in detail by some specific embodiments of the example to the utility model, this field It is to be understood by the skilled artisans that example above merely to be illustrated, rather than in order to limit the scope of the utility model.This Field it is to be understood by the skilled artisans that can not depart from the scope of the utility model and spirit in the case where, to above embodiments It modifies.The scope of the utility model is defined by the following claims.

Claims (11)

1. a kind of heart analog machine characterized by comprising

Chamber, the chamber are configured as variable volume, and the chamber has entrance and exit, and the entrance is configured to make Liquid flows into the chamber from outside, and the outlet is configured to that liquid is made to flow out to outside from the chamber；

Beating component, the beating component are configured to expand or shrink the volume of the chamber, when beating component enlarged cavity When the volume of room, the chamber sucks liquid from the entrance, and when component of beating reduces the volume of chamber, the chamber is from institute It states outlet and pumps out liquid；

The beating component is configured as: to the reduction volume of the volume of the chamber, accounting for beating component is expanded to chamber most The 10%-90% of big volume.

2. heart analog machine according to claim 1, which is characterized in that the heart analog machine includes sealing structure Part, the chamber are located inside the containment member, and the entrance and exit is arranged on the containment member, the entrance and The chamber is connected to by outlet with exterior space respectively.

3. heart analog machine according to claim 2, which is characterized in that the containment member includes cylinder body, the cylinder One end of body is closed end, and the beating component is protruded into cylinder body and is slidingly sealed with the inner wall of cylinder body, the chamber positioned at from To the region between sealed end, the beating component is configured to slide in cylinder body the beating component.

4. heart analog machine according to claim 3, which is characterized in that be arranged between beating component and the sealed end There is flexible glue film, the edge seal of the flexible glue film is connected on the containment member, is encapsulated between the flexible glue film and sealed end Region as the chamber.

5. heart analog machine according to claim 3, which is characterized in that the containment member includes cover board, the lid Plate is enclosed in one end of the cylinder body, forms the closed end.

6. heart analog machine according to claim 5, which is characterized in that the entrance and exit is arranged in the cover board On；

Alternatively, the entrance and exit is arranged on the cylinder body.

7. heart analog machine according to claim 4, which is characterized in that the containment member includes cover board, the lid Plate is enclosed in one end of the cylinder body, forms the closed end,

The edge of the flexible glue film is connected on the inner wall of the cylinder body；

Alternatively, the edge of the flexible glue film is connected on the cover board.

8. heart analog machine according to claim 1, which is characterized in that the inlet is provided with access flap valve machine Structure, access flap valve mechanism are configured to only allow liquid to be externally entering the chamber, and the exit is provided with standard and goes out Flap valve mechanism, Zhun Chu flap valve mechanism are configured to only allow liquid to flow out to outside from chamber.

9. heart analog machine according to claim 1, which is characterized in that the reduction volume, which accounts for beating component, expands chamber The 40%-50% of the maximum volume arrived greatly；

Alternatively, the reduction volume accounts for the 55%-70% for the maximum volume that beating component is expanded to chamber.

10. heart analog machine according to claim 3, which is characterized in that the beating component is piston, the heart Analog machine further includes rotating machine and link assembly, and the link assembly and the piston constitute crank link mechanism, and described turn Motivation is connect with the link assembly, and when rotating machine rotation, the piston is configured to do in the cylinder body past Multiple movement.

11. heart analog machine according to claim 10, which is characterized in that connection is distributed on the link assembly Hole, the connecting hole are pivotally connected for the connecting rod of link assembly.