CN114033658B - Heparin pump flow accuracy simulation test device and background simulation method - Google Patents

Abstract

A heparin pump flow accuracy simulation test device and a background simulation method relate to the field of medical equipment. The device comprises an experiment container, a pressurizing device and a measuring device, wherein the experiment container is provided with a first inlet, a second inlet and a third inlet, a pressurizing outlet of the pressurizing device is connected with the first inlet, the measuring device is connected with the second inlet, a heparin pump is connected with an extension pipe, the other end of the extension pipe is connected with the third inlet, a test tube is arranged inside the container, supports are fixed on two sides of the experiment container, and are respectively and fixedly connected with the measuring device and the pressurizing device and are provided with a switching device. According to the invention, the whole device can be fixed on the bracket rod of the external equipment through the bracket, the pressurizing inlet and the heparin pump injection point of the external equipment are at the same level height when in use through adjusting the bracket, and the switching device is used for realizing selective collection, so that the accuracy data of the heparin pump flow under the specified background is obtained.

Description

Heparin pump flow accuracy simulation test device and background simulation method

Technical Field

The invention relates to the field of medical equipment, in particular to a heparin pump flow accuracy simulation test device and a background simulation method.

Background

Heparin is the most commonly used hemodialysis anticoagulant in clinic, and hemodialysis equipment is provided with a heparin pump for anticoagulation in the hemodialysis treatment process, and risks are caused due to insufficient accuracy of the heparin pump.

And certain pressure exists in the normal operation process of the extracorporeal blood circuit. The pressure is background pressure in the operation process of the heparin pump, becomes the load of the heparin pump, influences the accuracy of the flow of the heparin pump, and two methods are commonly used at present, namely, under the condition of no background pressure, the heparin for bolus injection is directly collected for measurement, or a container for collecting and sealing under the background pressure is used for bolus injection collection through a plurality of inlets.

In the second method, after the background pressure is added in the test process, the simulation effect is improved, meanwhile, the liquid in the heparin pump pipe is compressed under the action of pressure, the heparin pump is required to slowly push and inject the liquid until the liquid flow is stable, part of the liquid inevitably drops into the measuring container to influence the initial value of the measuring container, and if the measuring container is taken out again to re-measure the initial value, the background pressure is re-released.

Disclosure of Invention

The invention aims to overcome at least one defect (deficiency) of the prior art, and provides a heparin pump flow accuracy simulation test device and a background simulation test method, which are used for solving the problem of inaccurate calculation of flow simulation test capacity.

The technical scheme adopted by the invention is as follows: the background simulation testing device for the accuracy of the heparin pump flow is provided with an experimental container, a pressurizing device and a measuring device, wherein the experimental container is a closed container, the experimental container is provided with a first inlet, a second inlet and a third inlet, a pressurizing outlet of the pressurizing device is connected with the first inlet and is used for adjusting the internal pressure of the experimental container, the measuring device is connected with the second inlet and is used for acquiring the pressure of the experimental container, the heparin pump is connected with an extension tube, the other end of the extension tube is connected with the third inlet, a test tube is arranged inside the container and corresponds to the third inlet and is used for collecting heparin injected by the heparin pump, the experimental container is fixedly provided with brackets towards two sides, and two ends of each bracket are respectively and fixedly connected with the pressurizing device and the heparin pump; and a switching device is arranged corresponding to the test tube and is used for changing the position of the test tube so that the switched test tube cannot collect heparin. In the scheme, the heparin pump carries out injection to the test tube in the test container through the extension tube, the pressurizing device pressurizes the test container through the second inlet to provide a pressure environment for simulating human blood circulation, the measuring device measures the pressure of the container in real time through the third inlet, in order to overcome the influence of the heparin test tubes with different height differences on the pressure difference of the sealed test container, accurate pressure is provided to the test container, when the heights of the connecting ports of the test pipeline and the heparin pump are not at the same height as the inlet of the pressurizing device, a certain pressure difference can appear on the connecting pipeline where the parts with the height differences are located, so that the pressure parameters in the test container are inaccurate, the injection quantity test of the final heparin pump in the background pressure environment is influenced, and therefore, the brackets on two sides of the test container are increased, so that the two can be at the same horizontal height, and finally the background pressure provided in the test container is accurate; in the invention, in order to ensure smooth implementation of the injection quantity, the whole section of the extension pipe is filled with liquid in advance before the injection test, namely, no air is generated in the whole section of the extension pipe, and after the injection of the heparin pump is ensured to be started, the test pipe can be reached, if the scheme is not limited, the heparin volume in the extension pipe is reduced due to the increase of the pressure in the environment of starting injection of the experimental container, so that bubbles appear in the extension pipe, in order to reduce the bubbles, the liquid is always further injected in a pushing way in an actual experimental operation, so that the liquid just can drop from a connecting pipeline, and if the dropped liquid enters the test pipe, the experiment is error; therefore, the device for switching the position of the test tube relative to heparin generated by the heparin pump when the background pressure is applied is further added on the basis of the test tube, so that unnecessary errors caused by the fact that liquid regulated by the heparin pump when bubbles are regulated is calculated into an experimental result when background pressure conditions are simulated are avoided.

The solution may further be that the switching device is provided with a buffer tube, and the buffer tube is arranged on a rotating base at one side of the test tube, so as to collect heparin liquid under non-test conditions. In the scheme, although the position of the test tube is switched by the switching device, experimental errors caused by injection of redundant heparin into the test tube are avoided, the risk that heparin liquid can further splash on the outer wall of the test tube exists, and a buffer tube is further added on the basis of the switching device to collect redundant heparin liquid; in particular, the switching mode can be a rotary base type or a mobile type.

The scheme may be that the switching device further includes a rotating base, the rotating base is used for placing and switching the test tube and the buffer tube, and the rotating base is rotationally connected with the bottom of the experimental container. The invention further increases the rotating base, changes the positions of the test tube and the buffer tube in a rotating switching mode, and compared with sliding switching, the rotating switching mode is smoother, the required space is smaller, and the risk of liquid splashing in the test tube is further reduced in a gentle switching mode.

As a preferred embodiment, the magnetic control and the magnetic element structure are designed symmetrically with respect to the center of the rotating base. In order to realize stable rotation of the rotating base, the invention further designs a symmetrical structure of the magnetic control piece and the magnetic piece, and the symmetrical structure enables the stress center of the magnetic control piece to be the center of the rotating base when the rotating base is controlled to rotate, and if the magnetic control piece and the rotating base deviate obviously, the rotating base deflects, so that liquid in the measuring device shakes obviously, the risk of liquid splashing exists, the liquid is easy to adhere to the inner wall of the measuring device, and the volume measurement of the liquid is not facilitated.

The scheme can be further that a supporting sphere is arranged, a supporting conical groove corresponding to the supporting sphere is arranged below the rotating base, the experimental container is provided with a conical groove corresponding to the supporting sphere, and the supporting of the rotating base at the bottom of the experimental container is realized through the supporting sphere. In order to realize a more gentle switching mode, the invention further increases the sphere supporting structure on the premise of saving space of the rotary switching device, and the sphere supporting structure has smaller friction force, so that the magnetic field control mode can be effectively adapted, and meanwhile, the switched rotary base and the test tubes or buffer tubes distributed on the rotary base can have a more accurate control mode on the basis of small friction force; specifically, the magnetic pieces and the magnetic control pieces can be arranged in the same size and opposite magnetic poles, the magnetic pieces are arranged outside the experimental container or are nested outside the experimental container, the magnetic control pieces are nested on the rotating base, and the rotating of the rotating base is realized by operating the magnetic control pieces outside the experimental container.

The solution may further be that the stand is an infusion stand of a standard configuration of hemodialysis equipment.

The scheme may further be that the measuring device is provided with an alarm system for alarming to prompt abnormal pressure in the experimental container.

The scheme can be that the experimental container further comprises an upper cover, a sealing ring and an experimental cavity, wherein the experimental cavity is provided with an opening corresponding to the upper cover, the opening is provided with a sealing ring groove, the sealing ring groove is used for bearing the sealing ring, the cover body, the sealing ring and the opening are used for realizing the closed environment of the experimental cavity, and the upper cover is provided with a first inlet, a second inlet and a third inlet.

Further, the experimental container is a transparent container.

Further, the first inlet, the second inlet and the third inlet are provided with luer connectors connected with the outside.

Furthermore, the cover body and the opening are provided with corresponding threads, and the experimental cavity is opened or closed through a threaded matching relationship.

The scheme further can be that an observation tube is arranged between the heparin pump and the extension tube, the observation tube is vertically arranged and connected with the outlet end of the heparin pump, and the lower end of the observation tube is lower than the lowest part of the upper cover and higher than the top ends of the test tube and the buffer tube. In order to further observe the bolus situation of the heparin pump, the invention further increases the arrangement of the straight pipe on the extension pipe, limits the height of the lower end of the straight pipe relative to the bottom end of the upper cover, the top ends of the test pipe and the buffer pipe, and is favorable for observing the bolus situation of the heparin pump on the experimental container through the structure and the communication principle thereof.

The background simulation method comprises the heparin pump flow accuracy simulation test device, and the method comprises the following steps:

the third inlet is connected with the heparin pump through an extension pipeline, the first inlet is communicated with the pressurizing device, and the second inlet is communicated with the measuring device;

fixing a heparin pump and an experimental container pressure test device which are communicated with each other;

applying a simulated pressure to the experimental vessel by the pressurizing means; at this time, the internal air pressure of the heparin pump is increased, and the liquid level at the bottom of the extension pipe is compressed above the inside of the outlet of the extension pipe;

adjusting the switching by the switching device so that the test tube is not aligned with the third inlet;

the heparin pump was pushed to push a small portion of the liquid out and the heparin level was again flush with the extension tube outlet.

Starting the self-injection of the heparin pump, and readjusting the switching device to enable the test tube to be aligned below the outlet of the extension tube again after the injection is stable, and starting timing;

stopping the injection of the heparin pump when the timing is finished; removing the test tube by the switching device so that it is not under the third inlet;

based on the time of bolus and the weight and volume of liquid in the test tube obtained, the bolus rate of the heparin pump was calculated to see if it met the manufacturer's specified range values.

Compared with the prior art, the invention has the beneficial effects that:

1. the invention further increases the horizontal alignment device on the experimental container, further reduces the pressure error when the background pressure is injected into the experimental container, and improves the accuracy of the experiment;

2. according to the invention, a switching device, namely a rotating base and a buffer tube, are additionally arranged under the condition of providing background pressure regulation, so that non-measuring heparin of a heparin pump is prevented from entering a test tube when the liquid level of an extension tube is regulated;

3. the rotating base is of a ball type supporting structure, has smaller friction force during rotation, and is beneficial to maintaining the stability of liquid in a test tube or a buffer tube;

4. the rotating base is realized through the cooperation between the magnetic part and the magnetic control part, the steady-state pressure built in the experimental container is not required to be destroyed, the switching between the internal test tube and the buffer tube is controlled by the attraction force of the magnetic materials outside the experimental container, and meanwhile, the level and the stability of the internal supporting surface are also favorable for keeping due to the attraction of the internal magnetic material and the external magnetic material.

Drawings

Fig. 1 is a structural diagram of the present invention.

Fig. 2 is a sectional view of the use state at line A-A in fig. 1.

Fig. 3 is a sectional view of the use state at line B-B in fig. 1.

Fig. 4 is a partial enlarged view of fig. 3.

Fig. 5 is a structural diagram of the present invention.

Fig. 6 is a block diagram of two views of a swivel base.

Fig. 7 is a bottom view of fig. 6.

Fig. 8 is a cut-away view of fig. 7.

In the figure, the experimental vessel 100, the first inlet 110, the second inlet 120, the third inlet 130, the supporting sphere 140, the magnetic control 150, the bracket 200, the test tube 310, the buffer tube 320, the rotating base 330, the supporting conical groove 331, the magnetic rolling groove 332, the first test groove 333, the measuring device 400, and the heparin pump 500 are shown.

Detailed Description

The drawings are for illustrative purposes only and are not to be construed as limiting the invention. For better illustration of the following embodiments, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the actual product dimensions; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

Example 1

As shown in fig. 1-5, a background simulation test device for accuracy of heparin pump flow is provided with an experiment container 100, a pressurizing device and a measuring device 400, wherein the experiment container 100 is a closed container, the experiment container 100 is provided with a first inlet 110, a second inlet 120 and a third inlet 130, a pressurizing outlet of the pressurizing device is connected with the first inlet 110 and is used for adjusting internal pressure of the experiment container 100, the measuring device 400 is connected with the second inlet 120 and is used for acquiring pressure of the experiment container 100, the heparin pump is connected with an extension tube, the other end of the extension tube is connected with the third inlet 130, a test tube 310 is arranged in the container, the test tube 310 is arranged corresponding to the third inlet 130 and is used for collecting heparin injected by pushing, the experiment container 100 is fixedly provided with a bracket 200 to two sides, the bracket 200 is respectively and fixedly connected with the pressurizing device and the heparin pump, an input port of the pressurizing device and an input port of the heparin pump are on the same horizontal plane or horizontal line, and a switching device is correspondingly arranged in the test tube 310.

The switching device is used to change the position of the test tube 310 so that the switched test tube 310 cannot collect heparin. In this scheme, the heparin pump carries out the injection through the extension tube to the test tube 310 in the experimental container 100, the pressure device is through the second entry 120 to pressurize experimental container 100, the pressure environment when providing the simulation human blood circulation, measuring device 400 measures the pressure of container in real time through third entry 130, wherein, in order to guarantee the smooth going on of injection volume, generally can make the whole section of extension tube full of liquid in advance before the injection test, the whole section of extension tube does not have the air to appear promptly, guarantee to realize the back that the injection of heparin pump can reach test tube 310, in order to overcome the pressure differential influence of heparin test tube 310 to the experimental container 100 of closure with different altitude differences, provide accurate pressure in experimental container 100.

When the height of the connection port of the test tube 310 and the heparin pump is not the same as the height of the inlet of the pressurizing device, a certain pressure difference occurs in the connection pipeline of the part with the height difference, so that the pressure parameter in the experimental container 100 is inaccurate, and the bolus quantity test of the heparin pump in the background pressure environment is affected, therefore, the brackets 200 on two sides of the experimental container 100 are added, so that the two parts can be at the same level, and the background pressure provided in the experimental container 100 is accurate; in the present solution, it is further considered that in the environment where the experimental container 100 starts to be injected with pressure, the increase of pressure will reduce the volume of heparin in the extension tube, so that bubbles appear in the extension tube, in order to reduce the bubbles, in actual experimental operation, liquid is often selected to be further injected by pushing, so that the liquid just can drop from the connecting pipeline, and if the dropped liquid enters the test tube 310, an error occurs in the experiment; therefore, the device for switching the position of the test tube 310 with respect to heparin generated by the heparin pump when the background pressure is applied is further added on the basis of the test tube 310, so that unnecessary errors caused by calculation of liquid regulated by the heparin pump when the heparin pump regulates bubbles in experimental results when background pressure conditions are simulated are avoided.

The solution may further be that the switching device is provided with a buffer tube 320, and the buffer tube 320 is disposed on a rotating base 330 at one side of the test tube 310, so as to collect heparin liquid under non-test conditions. In the switching device in the solution, although the position of the test tube 310 is switched to avoid experimental errors caused by injection of redundant heparin into the test tube 310, there is a risk that heparin liquid will further splash on the outer wall of the test tube 310, and the buffer tube 320 is further added to collect redundant heparin liquid on the basis of the switching device; specifically, the switching manner may be a rotary base 330 type or a mobile type.

The solution may further include a rotating base 330, where the rotating base 330 is used to place and switch the test tube 310 and the buffer tube 320, and the rotating base 330 is rotatably connected to the bottom of the experimental container 100. The present solution further proposes a specific setting of the switching device, in order to realize the switching function, the present invention further increases the rotating base 330, and changes the positions of the test tube 310 and the buffer tube 320 in a rotating switching manner, and compared with a sliding switching manner, the rotating switching manner is smoother, the required space is smaller, and the gentle switching manner further reduces the risk of liquid splashing in the test tube.

The solution may further be that a magnetic control 150 is disposed outside the experimental container 100, the rotating base 330 is fixedly connected with a magnetic member, the magnetic member is disposed corresponding to the magnetic control 150, and the magnetic member is operated by the magnetic control 150 to rotate the rotating base 330. In order to realize a more gentle switching mode, the invention further adopts a structure that a magnetic piece is arranged on the rotating base 330, and adopts a magnetic field indirect control mode, and meanwhile, the invention is well matched with the sealing design of the experimental container 100.

As a preferred embodiment, the magnetic control and the magnetic member 150 are configured to be symmetrically designed about the center of the rotating base 330. In order to realize stable rotation of the rotating base 330, the present invention further designs a symmetrical structure of the magnetic control element 150 and the magnetic element, wherein the stress center of the symmetrical structure is the center of the rotating base 330 when the rotating base 330 is controlled to rotate, and if the rotating base 330 and the stress center deviate obviously, the rotating base 330 deflects, so that the liquid in the measuring device 400 shakes obviously, the risk of liquid splashing exists, and the liquid is easy to adhere to the inner wall of the measuring device 400, which is unfavorable for volume measurement.

The solution may further be that a supporting sphere 140 is provided, a supporting conical groove 331 corresponding to the supporting sphere 140 is provided below the rotating base 330, the experimental container 100 is provided with a conical groove corresponding to the supporting sphere 140, and the supporting of the rotating base 330 at the bottom of the experimental container 100 is realized through the supporting sphere 140. In order to realize a more gentle switching mode, the invention further increases the sphere supporting structure on the premise of saving space of the rotary switching device, and the sphere supporting structure has smaller friction force, so that the magnetic field control mode can be effectively adapted, and meanwhile, the switched rotary base 330 and the test tubes 310 or buffer tubes 320 distributed on the rotary base 330 can have a more accurate control mode on the basis of small friction force; specifically, the magnetic pieces and the magnetic control pieces 150 may be arranged with the same size and opposite magnetic poles, the magnetic pieces should be located outside the experimental container 100 or nested outside the experimental container 100, the magnetic control pieces 150 are nested on the rotating base 330, and the rotating base 330 is realized by operating the magnetic control pieces 150 outside the experimental container 100.

The solution may further be that the stand 200 is an infusion stand configured in standard manner for hemodialysis equipment.

The solution may further be that the measuring device 400 is provided with an alarm system for alarming to indicate an abnormal pressure in the experimental vessel 100.

The solution may further be that the experimental container 100 includes an upper cover, a sealing ring, and an experimental cavity, where the experimental cavity is provided with an opening corresponding to the upper cover, the opening is provided with a sealing ring groove, the sealing ring groove is used for bearing the sealing ring, the cover, the sealing ring, and the opening are used for realizing a closed environment of the experimental cavity, and the upper cover is provided with a first inlet 110, a second inlet 120, and a third inlet 130.

Further, the experimental container 100 is a transparent container.

Further, the first inlet 110, the second inlet 120, and the third inlet 130 are provided with luer connectors connected to the outside.

Furthermore, the cover body and the opening are provided with corresponding threads, and the experimental cavity is opened or closed through a threaded matching relationship.

The solution may further be that an observation tube is disposed between the heparin pump and the extension tube, the observation tube is vertically disposed and connected with the outlet end of the heparin pump, and the lower end of the observation tube is lower than the lowest part of the upper cover and higher than the top ends of the test tube 310 and the buffer tube 320. In order to further observe the bolus condition of the heparin pump, the invention further increases the arrangement of the straight tube on the extension tube, limits the height of the lower end of the straight tube relative to the bottom end of the upper cover and the top ends of the test tube 310 and the buffer tube 320, and is beneficial to observing the bolus condition of the heparin pump on the experimental container 100 through the structure and the communication principle thereof.

The solution may further be that, as shown in fig. 6-8, the rotating base 330 includes a supporting conical groove 331, a magnetic rolling groove 332, a first test groove 333, and a second switching groove, where the supporting conical groove 331 and the magnetic rolling groove 332 are located on the bottom surface of the rotating base 330, the other side of the rotating base 330 is provided with the first test groove 333 for placing the test tube 310 and the second switching groove for placing the buffer tube 320, the supporting conical groove 331 is conical, and the supporting conical groove 331 is adapted to the supporting sphere 140.

Further, a connecting seat is further provided at the outer side of the bottom of the experimental container 100, the connecting seat is provided with threads, and the magnetic control 150 is provided with a threaded hole corresponding to the threads.

Further, a corresponding conical seat is provided corresponding to the supporting conical groove 331, the conical seat is provided with a supporting ball, and the supporting ball 140 is used for supporting the rotating base 330.

Further, the magnetic member is a magnetic ball placed in the magnetic rolling groove 332.

The background simulation method comprises the heparin pump flow accuracy simulation test device, and the method comprises the following steps:

connecting the third inlet 130 with the heparin pump 500 through an extension line while the first inlet 110 communicates with the pressurizing means and the second inlet 120 communicates with the measuring means 400;

fixing a heparin pump and a pressure test device of the experimental container 100 which are communicated with each other;

applying a simulated pressure to the experimental vessel 100 by a pressurizing means; at this time, the air pressure in the heparin pump 500 is increased, and the liquid surface at the bottom of the extension pipe is compressed above the inside of the outlet of the extension pipe;

adjusting the switching by the switching means such that the test tube 310 is not aligned with said third inlet 130;

the bolus heparin pump 500 causes it to bolus a small portion of the liquid and the heparin level is again flush with the extension tube outlet.

Starting the self-injection of the heparin pump 500, readjusting the switching device after the injection is stable to enable the test tube 310 to be aligned below the outlet of the extension tube again, and starting timing;

stopping the bolus of heparin pump 500 while the timing is over; the test tube 310 is moved out of position by the switching means so as not to be under the third inlet 130;

based on the time of bolus and the weight and volume of fluid in test tube 310 obtained, the bolus rate of the heparin pump is calculated to see if it meets the manufacturer's specified range values.

Compared with the prior art, the invention has the beneficial effects that:

1. the invention further increases the horizontal alignment device on the experimental container 100, further reduces the pressure error when the experimental container 100 is injected with the background pressure, and improves the accuracy of the experiment;

2. the invention further adds a switching device, namely a rotating base 330 and a buffer tube 320, under the condition of providing background pressure adjustment, so as to prevent non-measuring heparin from entering the test tube 310 when the liquid level of the extension tube is adjusted by the heparin pump;

3. the rotating base 330 is a ball-type supporting structure, and has smaller friction force during rotation, which is beneficial to maintaining the stability of the liquid in the test tube 310 or the buffer tube 320;

4. the rotating base 330 is realized by the cooperation between the magnetic element and the magnetic control element 150, the steady-state pressure built inside the experimental container 100 is not required to be destroyed, the switching between the inner test tube 310 and the buffer tube 320 is controlled by the attraction force of the magnetic materials outside the experimental container 100, and meanwhile, the inner support surface is also beneficial to be kept horizontal and stable due to the attraction of the inner magnetic material and the outer magnetic material.

It is apparent that the examples of the present invention are merely examples for clearly illustrating the technical aspects of the present invention, and are not limited to the specific embodiments of the present invention. Any modification, equivalent replacement, improvement, etc. that comes within the spirit and principle of the claims of the present invention should be included in the protection scope of the claims of the present invention.

Claims (8)

1. A background analog testing device for heparin pump flow accuracy is provided with an experimental container, a pressurizing device and a measuring device, wherein the measuring device is used for measuring heparin pump injection accuracy,

the experimental container is a closed container and is provided with a first inlet, a second inlet and a third inlet;

the pressurizing outlet of the pressurizing device is connected with the first inlet and is used for adjusting the internal pressure of the experimental container;

the measuring device is connected with the second inlet and is used for acquiring the pressure of the experimental container;

the heparin pump is connected with an extension pipe, and the other end of the extension pipe is connected with the third inlet;

a test tube connected with the heparin pump is arranged in the container, and the test tube is arranged corresponding to the third inlet and is used for collecting the injected heparin;

brackets are fixed on two sides of the experimental container and are respectively and fixedly connected with the pressurizing device and the heparin pump, so that the height of a connecting port of the test tube and the heparin pump is the same as the inlet of the pressurizing device;

an observation tube is arranged between the heparin pump and the extension tube;

and a switching device is arranged corresponding to the test tube and used for changing the position of the test tube so as to collect heparin liquid under non-test conditions.

2. The heparin pump flow accuracy background analog testing device of claim 1, wherein said switching device is provided with a buffer tube, said buffer tube being disposed on one side of said test tube.

3. The heparin pump flow accuracy background analog testing device of claim 2, wherein said switching device comprises a swivel base for placing and switching said test tube, said buffer tube, said swivel base being rotatably connected to said bottom of said test vessel.

4. A heparin pump flow accuracy background analog testing device according to claim 3, wherein a supporting sphere is provided, a supporting column groove corresponding to the supporting sphere is provided below the rotating base, the experimental container is provided with a conical groove corresponding to the supporting sphere, and the supporting and rotating of the rotating base at the bottom of the experimental container are realized through the supporting sphere.

5. The heparin pump flow accuracy background analog testing device of claim 2, wherein said stand is adapted to connect an infusion support that mates with blood purification type equipment.

6. The heparin pump flow accuracy background analog testing device of any one of claims 1-5, wherein said laboratory vessel is a transparent vessel.

7. The heparin pump flow accuracy background analog testing apparatus of any one of claims 1-5, wherein said first, second and third inlets are provided with externally connected luer connectors.

8. Background analog simulation method comprising the heparin pump flow accuracy analog test device according to any one of claims 2-5, characterized in that the method comprises: the third inlet is connected with the heparin pump through an extension pipeline, the first inlet is communicated with the pressurizing device, and the second inlet is communicated with the measuring device;

fixing a heparin pump and an experimental container pressure test device which are communicated with each other;

applying a simulated pressure to the experimental vessel by the pressurizing means; at this time, the internal air pressure of the heparin pump is increased, and the liquid level at the bottom of the extension pipe is compressed above the inside of the outlet of the extension pipe;

adjusting the switching by the switching device so that the test tube is not aligned with the third inlet;

the heparin pump is pushed to push out a small part of liquid, and the heparin liquid level is flushed with the outlet of the extension tube again;

starting the self-injection of the heparin pump, and readjusting the switching device to enable the test tube to be aligned below the outlet of the extension tube again after the injection is stable, and starting timing;

stopping the injection of the heparin pump when the timing is finished; removing the test tube by the switching device so that it is not under the third inlet;

based on the time of bolus and the weight and volume of liquid in the test tube obtained, the bolus rate of the heparin pump was calculated to see if it met the manufacturer's specified range values.

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