CN208785412U - heart simulator - Google Patents

Abstract

The utility model discloses a heart simulation device. The cardiac simulation device includes a chamber configured to be variable in volume, the chamber having an inlet and an outlet, the inlet being configured to allow fluid to flow into the chamber from the outside, the outlet a pulsatile member configured to expand or contract the volume of the chamber, when the pulsatile member expands the volume of the chamber, the chamber a chamber draws liquid from said inlet, said chamber pumps liquid from said outlet as a pulsatile member reduces the volume of the chamber; a pressure monitoring device for monitoring pressure outside said outlet, said pulsatile member configured to : if the pressure monitoring device detects that the pressure reaches a predetermined value, stop, slow down or postpone the operation of reducing the volume of the 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；

For monitoring the pressure monitoring device of the outlet outside pressure, the beating component is configured as: if the pressure Power monitoring device monitors that pressure reaches predetermined value, then stops or slow down the operation for reducing the volume of the chamber.

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

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.

One of the utility model has the technical effect that heart analog machine can monitor the pressure in outlet outside.

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 heart analog machine is also configured with pressure monitoring device.The pressure monitoring device is configured to use Blood pressure, fluid pressure in monitoring exit or outlet outside.The pressure information monitored can be sent to heart analog machine Electronic control module or external equipment, for monitoring, studying.Further, be configured as can for the pressure monitoring device To be electrically connected with beating component formation, or the transmitting of control signal is realized by electronic control module.The pressure monitoring dress It sets and plays the role of pressure feedback in heart analog machine, if monitoring hypertonia, have exceeded safe range, then heart Analog machine can stop or slow down the beating component to the reduction operation of chamber.

The utility model is not intended to limit how the signal of pressure monitoring device fed back to detection device.Such as optionally, The pressure monitoring device can directly send a signal to beating component.Alternatively, heart analog machine has electronic control mould Monitoring signals are sent to electronic control module by block, pressure monitoring device, and electronic control module is further according to the specific of monitoring signals Information sends control signal to beating component.Control beating component stops or slows down the compression chamber.

Correspondingly, the beating component is configured to, when receiving the signal from pressure monitoring device or electronic control module Afterwards, it can stop or slow down and movement is put out to blood in chamber；Alternatively, the execution for putting out movement can also be postponed.In this way, institute Alleviation can must be played by stating pressure or blood pressure at chamber outlet, avoided blood pressure beyond safe range, caused damages.

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 invention can also be adjusted reduction volume to the 0%- for accounting for chamber maximum capacity 100%.0%, heart analog machine described in the reduction volume of 1% and 99%, the 100% this limit also may be implemented, Ke Yiying For simulating the special circumstances of heart, the present invention limits 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 people discovery of the utility model, the heart There are relevances for ejection fraction and human body the triggering respiratory movement of room.Under normal conditions, people carries out primary complete respiratory movement, Period has 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 people of the utility model appreciates this problem, and then in heart assistance provided by the utility model Beating feature has been embodied in equipment.Also, in a preferred embodiment, heart analog machine limits the reduction volume of chamber 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.

The heart analog machine of the utility model adjusts the function of unit time transport blood volume (cardiac output) in addition to realizing Can be outer, it can also realize to diastole end volume, the last volume of contraction, often the physiologic functions such as the amount of fighting, ejection fraction, heart rate refer to Regulation and control under the high simulated conditions of target.

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 is not intended to limit support and is 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.In the embodiment shown in Fig. 1,2, two connecting rods in the link assembly 41 are End is connected, in this way, the difference between the extreme lower position and extreme higher position of component 2 of beating is larger, generation when rotating machine rotates Reduction volume is bigger, and the maximum capacity of chamber is also bigger.In other embodiments, two connecting rods can also pass through difference The connecting hole 42 of position is pivotally connected.It, can be to the chamber of heart analog machine by adjusting the link position of two connecting rods The parameters such as capacity, reduction volume are adjusted, to be adapted to the ventricle of simulation 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 it is possible to the amount for being filled with or being sucked out pressure chamber by controlling pressure fluid as the advantages of beating component, to the chamber Capacity, output and reduction volume are accurately controlled.In the case where heart analog machine is used to substitute the application environment of normal heart, The accuracy of guarantee chamber capacity that can be more reliable as beating component using hydraulic device, reduces due to capacity, output The caused dysfunction phenomenon of exception.

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.By the control to intake velocity, pneumatic shuttle is convenient for it The size and power of output pressure are controlled.The pressure size that pneumatic shuttle exports can be limited in a predetermined value, it should Predetermined value is the safe blood pressure upper limit value in the exit of chamber.If chamber and its blood pressure of outlet have reached predetermined value, gas Pressure device can not the further charged pressure gas into pressure chamber 35, avoid the blood pressure of outlet further up, improve safety.

Heart analog machine provided by the utility model is configured with pressure monitoring device, can carry out to the pressure outside outlet Monitoring, to be studied, or it is corresponding convenient for making in practical applications.Component of beating cooperates with pressure monitoring device, energy Enough play the role of blood pressure protection, prevents showing for hyperpiesia, reduce harm resulting from.Further, this reality Liquid or blood are pumped out by the way of pulsation type output with the heart analog machine of novel offer, can preferably be simulated just The blood supply rule of normal heart.It is smaller to the destruction of haemocyte.Particularly, the heart analog machine of the utility model, which introduces, penetrates blood The concept of score controls the reduction volume of chamber, so that reducing human body a possibility that adverse reaction occurs.

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 (10)

1. a cardiac simulation device, is characterized in that, comprises: a chamber, the chamber being configured to be variable in volume, the chamber having an inlet and an outlet, the inlet being configured to enable liquid to flow into the chamber from the outside, the outlet being configured to enable the liquid outflow from the chamber to the outside; a pulsatile member configured to expand or contract the volume of the chamber, the chamber draws fluid from the inlet when the pulsatile member expands the volume of the chamber, and when the pulsatile member reduces the volume of the chamber , the chamber pumps out the liquid from the outlet; A pressure monitoring device for monitoring the pressure outside the outlet, the pulsating member being configured to stop or slow down the operation of reducing the volume of the chamber if the pressure monitoring device detects that the pressure reaches a predetermined value. 2. The cardiac simulation device according to claim 1, wherein the cardiac simulation device comprises a sealing member, the chamber is located inside the sealing member, and the inlet and the outlet are provided on the sealing member, The inlet and outlet respectively communicate the chamber with the external space. 3 . The heart simulation device according to claim 2 , wherein the sealing member comprises a cylinder, one end of the cylinder is a closed end, and the pulsating component extends into the cylinder and is connected with the inner wall of the cylinder. 4 . A sliding seal, the chamber is located in a region from the pulsating member to the sealing end, the pulsating member being configured to slide within the cylinder. 4. The cardiac simulation device according to claim 3, wherein a soft glue film is provided between the pulsating part and the sealing end, and the edge of the soft glue film is sealed and connected on the sealing member, and the The encapsulated area between the soft film and the sealed end serves as the chamber. 5 . The cardiac simulation device according to claim 3 , wherein the sealing member comprises a cover plate, and the cover plate is sealed at one end of the cylinder to form the closed end. 6 . 6. The cardiac simulation device according to claim 5, wherein the inlet and the outlet are arranged on the cover plate; Alternatively, the inlet and outlet are provided on the cylinder. 7 . The cardiac simulation device according to claim 4 , wherein the sealing member comprises a cover plate, and the cover plate is sealed at one end of the cylinder to form the closed end, 8 . The edge of the soft glue film is connected to the inner wall of the cylinder; Alternatively, the edge of the soft adhesive film is connected to the cover plate. 8. The heart simulation device according to claim 1, wherein an access valve mechanism is provided at the inlet, and the access valve mechanism is configured to only allow liquid to enter the chamber from the outside, An exit flap mechanism is provided at the outlet, and the exit flap mechanism is configured to only allow liquid to flow out of the chamber to the outside. 9 . The cardiac simulation device of claim 1 , wherein the pulsating member is configured to reduce the volume of the chamber by 10% of the maximum volume to which the pulsating member expands the chamber. 10 . -90%. 10. The heart simulation device according to claim 9, wherein the reduction amount accounts for 40%-50% of the maximum volume to which the chamber is enlarged by the beating member; Alternatively, the reduction is between 55% and 70% of the maximum volume to which the pulsatile member expands the chamber.