CN114033658A - Heparin pump flow accuracy simulation test device and background pressure simulation method - Google Patents
Heparin pump flow accuracy simulation test device and background pressure simulation method Download PDFInfo
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- CN114033658A CN114033658A CN202111332145.8A CN202111332145A CN114033658A CN 114033658 A CN114033658 A CN 114033658A CN 202111332145 A CN202111332145 A CN 202111332145A CN 114033658 A CN114033658 A CN 114033658A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B51/00—Testing machines, pumps, or pumping installations
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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Abstract
A heparin pump flow accuracy simulation testing device and a background pressure simulation method relate to the field of medical instruments. Be equipped with experiment container, pressure device, measuring device, the experiment container is equipped with first entry, second entry, third entry, pressure device's pressurization exit linkage first entry, measuring device connects the second entry, the heparin pump is connected with the extension pipe, the other end of extension pipe is connected the third entry, the inside test tube that is equipped with of container, experiment container both sides are fixed with the support, the support is fixed connection respectively measuring device pressure device is equipped with auto-change over device. The whole device can be fixed on a support rod of external equipment through the support, the pressurizing inlet and the injection point of the heparin pump when the external equipment is used are at the same horizontal height through adjusting the support, selective collection is realized through the switching device, and accurate data of the flow rate of the heparin pump under the specified background pressure are obtained.
Description
Technical Field
The invention relates to the field of medical instruments, in particular to a heparin pump flow accuracy simulation testing device and a background pressure simulation method.
Background
Heparin is the most commonly used anticoagulant for hemodialysis in clinic, and the anticoagulant in the hemodialysis treatment process is realized by configuring a heparin pump in the hemodialysis equipment, so that risks are caused due to the insufficient accuracy of the heparin pump.
And certain pressure exists in the normal running process of the extracorporeal blood circuit. The pressure is the background pressure in the running process of the heparin pump, becomes the load of the heparin pump, and influences the accuracy of the flow of the heparin pump, and the currently common methods comprise two methods, wherein one method is to directly collect injected heparin for determination under the condition of no background pressure, or to collect injected heparin through a plurality of inlets in a closed container under the background pressure.
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 the pressure, the heparin pump needs to push the liquid slowly at the moment, air is discharged until the liquid flow is stable, part of the liquid inevitably drops into the measuring container in the process, the initial value of the measuring container is influenced, and if the measuring container is taken out to measure the initial value again at the moment, the background pressure is released again.
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 testing device and a background pressure simulation method, which are used for solving the problem of inaccurate calculation of flow simulation testing capacity.
Therefore, the technical scheme adopted by the invention is as follows: a background pressure simulation test device for the flow accuracy of a heparin pump is provided with an experimental container, a pressurizing device and a measuring device, used for measuring the injection accuracy of the heparin pump, the experimental container is a closed container, the experimental container 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, for regulating the internal pressure of the test vessel, the measuring device being connected to the second inlet, used for obtaining 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 in the container and corresponds to the third inlet, the device is used for collecting injected heparin, a bracket is fixed on the two sides of the experimental container, and the two ends of the 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 used for changing the position of the test tube so that the switched test tube cannot collect heparin. In the scheme, the heparin pump injects the test tube in the experimental container through the extension tube, the pressurizing device pressurizes the experimental container through the second inlet to provide a pressure environment for simulating the blood circulation of a human body, the measuring device measures the pressure of the container in real time through the third inlet to provide accurate pressure to the experimental container in order to overcome the pressure difference influence of the heparin test tubes with different height differences on the closed experimental container, when the height of the connecting port of the test pipeline and the heparin pump is not at the same height as the inlet of the pressurizing device, a certain pressure difference occurs in the connecting pipeline where the part with the height difference is positioned, so that the pressure parameters in the experimental container are inaccurate, the injection test of the heparin pump in the background pressure environment is influenced, therefore, the addition of the brackets on both sides of the experimental vessel allows both to be at the same level, eventually making the background pressure provided in the experimental vessel accurate; in the invention, in order to ensure the smooth operation of the injection amount, the whole extension tube is generally filled with liquid in advance before the injection test, namely no air appears in the whole extension tube, and the injection of the heparin pump can reach the test tube after the start of the injection test; therefore, the device for switching the position of the test tube by applying the heparin generated by adjusting the background pressure by the heparin pump is further added on the basis of the test tube, so that unnecessary errors caused by calculation of the liquid adjusted by the heparin pump when the bubbles are adjusted in the experimental result under the condition of simulating the background pressure are avoided.
The solution may further be that the switching device is provided with a buffer tube arranged on a rotating base at one side of the test tube to collect heparin liquid under non-test conditions. Although the switching device in the scheme avoids experimental errors caused by injecting redundant heparin into the test tube by switching the position of the test tube, the risk that heparin liquid is further splashed 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 the redundant heparin liquid; in particular, the switching mode can be a rotary base type and a movable type.
The scheme further may be that the switching device 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 rotatably connected with the bottom of the experimental container. The scheme further provides the specific arrangement of the switching device, and in order to realize the switching function, the rotary base is further added, the positions of the test tube and the buffer tube are changed in a rotary switching mode, the rotary switching mode is more gentle compared with sliding switching, the required space is smaller, and the gentle switching mode further reduces the risk of splashing of liquid in the test tube.
In a preferred embodiment, the magnetic control part and the magnetic part structure are designed symmetrically with respect to the center of the rotating base. In order to realize the stable rotation of the rotating base, the invention further designs a symmetrical structure of the magnetic control piece and the magnetic piece, the symmetrical structure ensures that when the rotating base is controlled to rotate, the stress center is the center of the rotating base, if the stress center and the magnetic piece are obviously deviated, the rotating base can deflect, so that the liquid in the measuring device obviously shakes, the liquid is in risk of splashing, and the liquid is easily adhered to the inner wall of the measuring device, thereby being not beneficial to the measurement of the volume of the measuring device.
The scheme can be further that a supporting ball body is arranged, a supporting conical groove corresponding to the supporting ball body is arranged below the rotating base, the experiment container is provided with a conical groove corresponding to the supporting ball body, and the rotating base is supported at the bottom of the experiment container through the supporting ball body. In order to realize a more gentle switching mode, the invention further adds a sphere supporting structure on the premise that the rotary switching device can save space, 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 part and the magnetic control part can be arranged in the same size and with opposite magnetic poles, the magnetic part is arranged outside the experiment container or nested outside the experiment container, the magnetic control part is nested on the rotating base, and the rotating base rotates by operating the magnetic control part outside the experiment container.
The scheme can be further that the support is an infusion support which is in standard configuration with hemodialysis equipment.
The scheme further can be that the measuring device is provided with an alarm system for alarming and prompting abnormal pressure in the experimental container.
The scheme further can be, the experiment container includes upper cover, sealing washer, experiment cavity, the experiment cavity is equipped with the correspondence the opening of upper cover, the opening is equipped with the sealing washer groove, the sealing washer groove is used for holding puts the sealing washer, the lid the sealing washer with the opening is used for realizing the closed environment of experiment cavity, the upper cover is equipped with first entry the second entry the third entry.
Further, the experimental container is a transparent container.
Furthermore, luer connectors connected with the outside are arranged on the first inlet, the second inlet and the third inlet.
Furthermore, the cover body and the opening are provided with corresponding threads, and the experiment cavity is opened or closed through the thread matching relationship.
The scheme can be further that, the heparin pump with be equipped with the observation tube between the extension tube, the vertical setting of observation tube and connecting the heparin pump exit end, the lower extreme of observation tube is less than the lowest of upper cover just is higher than the top of test tube, buffer tube. In order to further observe the pushing situation of the heparin pump, the straight pipe is further arranged on the extension pipe, the height of the lower end of the straight pipe relative to the bottom end of the upper cover and the top ends of the test pipe and the buffer pipe is limited, and the pushing situation of the heparin pump on the experimental container can be observed conveniently through the structure and the communication principle of the structure.
A background compression simulation method comprises the heparin pump flow accuracy simulation test device, and the method comprises the following steps:
connecting the third inlet with the heparin pump through an extension pipeline, and simultaneously enabling the first inlet to be communicated with the pressurizing device and the second inlet to be communicated with the measuring device;
fixing the heparin pump and the experimental container pressure test device which are communicated with each other;
applying a simulated pressure to the test container by a pressurizing device; at the moment, the air pressure in the heparin pump is increased, and the liquid level at the bottom of the extension pipe is compressed to the upper part of the interior 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 outlet;
the heparin pump is pushed to push a small part of liquid, and the liquid level of the heparin is flushed with the outlet of the extension tube again.
Starting the injection of the heparin pump, readjusting the switching device after the injection is stable to enable the test tube to be aligned below the outlet of the extension tube again, and starting timing;
stopping the bolus injection of the heparin pump when the timing is finished; moving the measuring device away from the third inlet by the switching device;
and calculating the bolus speed of the heparin pump according to the bolus time and the acquired liquid weight and volume of the measuring device to judge whether the bolus speed conforms to the range value specified by the manufacturer.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention further adds a horizontal alignment device on the experimental container, further reduces the pressure error when the experimental container 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 and a buffer tube, under the condition of providing the adjustment of the background pressure, so as to prevent non-measuring heparin from entering the test tube when the liquid level of the extension tube is adjusted by the heparin pump.
3. The rotating base is of a ball type supporting structure, so that the friction force is smaller during rotation, and the stability of liquid in the test tube or the buffer tube is favorably maintained;
4. the rotating base is realized through the matching between the magnetic part and the magnetic control part, the stable pressure built inside the experiment container is not needed to be damaged, the mutual attraction of the magnetic materials controls the switching between the internal test tube and the buffer tube outside the experiment container, and meanwhile, the mutual attraction of the internal and external magnetic materials is also favorable for keeping the level and the stability of the internal supporting surface.
Drawings
FIG. 1 is a block diagram of the present invention.
Fig. 2 is a sectional view of the use state of fig. 1 taken along line a-a.
Fig. 3 is a sectional view of the use state of fig. 1 taken along line B-B.
Fig. 4 is a partially enlarged view of fig. 3.
Fig. 5 is a structural view of the present invention.
Fig. 6 is a structural view of two views of the rotating base.
Fig. 7 is a bottom view of fig. 6.
Fig. 8 is a cutaway view of fig. 7.
In the figure, the experiment container 100, the first inlet 110, the second inlet 120, the third inlet 130, the support sphere 140, the magnetron 150, the support frame 200, the test tube 310, the buffer tube 320, the rotating base 330, the support cone 331, the magnetic rolling groove 332, the first test groove 333, the second switching groove 334, the pressurizing device 400, and the measuring device 500 are shown.
Detailed Description
The drawings are only for purposes of illustration and are not to be construed as limiting the invention. For a better understanding of the following embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood 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 to 5, a background pressure simulation testing device for heparin pump flow accuracy is provided with an experimental container 100, a pressurizing device, and a measuring device, for measuring the bolus accuracy of a heparin pump, wherein the experimental container 100 is a closed container, the experimental 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 to the first inlet 110 for adjusting the internal pressure of the experimental container 100, the measuring device is connected to the second inlet 120 for obtaining the pressure of the experimental container 100, the heparin pump is connected to an extension tube, the other end of the extension tube is connected to the third inlet 130, a testing tube 310 is provided inside the container, the testing tube 310 is provided corresponding to the third inlet 130 for collecting heparin, and a bracket 200 is fixed to both sides of the experimental container 100, the support 200 is respectively fixedly connected with the pressurizing device and the heparin pump, the input port of the pressurizing device and the input port of the heparin pump are on the same horizontal plane or horizontal line, a switching device is arranged corresponding to the test tube 310, and the switching device is used for changing the position of the test tube 310 so that the switched test tube 310 cannot collect heparin. In the scheme, a heparin pump injects a liquid into a test tube 310 in an experiment container 100 through an extension tube, a pressurizing device pressurizes the experiment container 100 through a second inlet 120 to provide a pressure environment for simulating human blood circulation, and a measuring device measures the pressure of the container in real time through a third inlet 130, wherein, in order to ensure smooth injection amount, the whole section of the extension tube is generally filled with liquid in advance before injection test, namely no air appears in the whole section of the extension tube, after the injection test is started, the injection of the heparin pump can reach the test tube 310, in order to overcome the pressure difference influence of the heparin test tube 310 with different height differences on the closed experiment container 100 and provide accurate pressure into the experiment container 100, when the height of a connection port of the test tube 310 and the heparin pump is not at the same height as the inlet of the pressurizing device, a certain pressure difference can occur on the connection tube where the position with the height difference, the pressure parameters inside the experimental container 100 are inaccurate, which affects the final injection amount test of the heparin pump in the background pressure environment, therefore, the brackets 200 on both sides of the experimental container 100 are added, so that the two can be at the same level, and finally the background pressure provided in the experimental container 100 is accurate; in the scheme, the volume of heparin in the extension tube is reduced due to the increase of the pressure in the pressure environment in which the experimental container 100 starts to be injected, so that bubbles appear in the extension tube, in order to reduce the bubbles, liquid is often injected into the extension tube in a further pushing mode in the actual experimental operation, so that the liquid just can drip from the connecting pipeline until the liquid enters the testing tube 310, and errors can appear in the experiment if the liquid drips into the testing tube 310; therefore, the scheme is that a device for switching the position of the test tube 310 by applying the heparin generated by the heparin pump during background pressure adjustment is further added on the basis of the test tube 310, so that unnecessary errors caused by calculation of the liquid adjusted by the heparin pump during bubble adjustment into an experimental result under the condition of simulating the background pressure are avoided.
The solution may further be that the switching device is provided with a buffer tube 320, the buffer tube 320 being arranged on a rotating base 330 at one side of the test tube 310 for collecting heparin liquid under non-test conditions. Although the switching device in the scheme avoids experimental errors caused by injecting redundant heparin into the test tube 310 by switching the position of the test tube 310, the risk that heparin liquid is further splashed on the outer wall of the test tube 310 exists, and the buffer tube 320 is added to collect redundant heparin liquid on the basis of the switching device; specifically, the switching manner may be a rotating base 330 type, or a movable type.
The solution may further be that the switching device comprises a rotating base 330, the rotating base 330 is used for placing and switching the test tube 310 and the buffer tube 320, and the rotating base 330 is rotatably connected with the bottom of the experimental container 100. The scheme further provides a specific arrangement of a switching device, in order to realize the switching function, the invention further adds the rotating base 330, and the positions of the test tube 310 and the buffer tube 320 are changed in a rotating switching mode, compared with sliding switching, the rotating switching mode is more gradual, the required space is smaller, and the gradual switching mode further reduces the risk of splashing liquid in the test tube.
The scheme may further be that a magnetic control is arranged on the outer side of the experimental container 100, a magnetic part is fixedly connected to the rotating base 330, the magnetic part is arranged corresponding to the magnetic control, and the magnetic part is operated by the magnetic control to rotate the rotating base 330. In order to realize a more gradual switching mode, the invention further adopts a structure that the rotating base 330 is provided with a magnetic part, and adopts a mode of indirect control through a magnetic field, and the mode also well fits the sealing design of the experimental container 100.
In a preferred embodiment, the magnetic control and the magnetic element structure are designed to be symmetrical with respect to the center of the rotating base 330. In order to realize the stable rotation of the rotating base 330, the present invention further designs a symmetric structure of the magnetic control element and the magnetic element, such that when the rotating base 330 is controlled to rotate, the stress center is the center of the rotating base 330, and if the two are significantly deviated, the rotating base 330 will deflect, so that the liquid in the measuring device will significantly shake, which has the risk of splashing, and the liquid will easily stick to the inner wall of the measuring device, which is not favorable for the measurement of the volume.
The solution may further be that a supporting sphere is provided, a supporting tapered slot 332 corresponding to the supporting sphere is provided below the rotating base 330, the experiment container 100 is provided with a tapered slot corresponding to the supporting sphere 140, and the supporting of the rotating base 330 at the bottom of the experiment container 100 is realized through the supporting sphere. In order to realize a more gradual switching mode, the invention further adds a sphere supporting structure on the premise that the rotary switching device can save space, 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 member and the magnetic control member 150 may be arranged in the same size and with opposite magnetic poles, the magnetic member should be located outside the experiment container 100 or nested outside the experiment container 100, the magnetic control member 150 is nested on the rotating base 330, and the rotating base 330 is rotated by operating the magnetic control member 150 outside the experiment container 100.
The solution may further be that the stand 200 is a stand for a standard configuration of a hemodialysis machine.
The scheme may further be that the measuring device is provided with an alarm system for alarming and prompting abnormal pressure in the experimental container 100.
The scheme further can be that the experiment container 100 includes an upper cover, a sealing ring and an experiment cavity, the experiment 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 experiment cavity, and the upper cover is provided with the first inlet 110, the second inlet 120 and the 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 male luer connectors for external connection.
Furthermore, the cover body and the opening are provided with corresponding threads, and the experiment cavity is opened or closed through the thread matching relationship.
The scheme further can be that, the heparin pump with be equipped with the observation tube between the extension tube, the vertical setting of observation tube and connecting the heparin pump exit end, the lower extreme of observation tube is less than the lowest of upper cover and is higher than the top of test tube 310, buffer tube 320. In order to further observe the bolus injection condition of the heparin pump, the straight pipe is further arranged on the extension pipe, the height of the lower end of the straight pipe relative to the bottom end of the upper cover and the top ends of the test pipe 310 and the buffer pipe 320 is limited, and the bolus injection condition of the heparin pump on the experimental container 100 can be observed conveniently through the structure and the communication principle of the structure.
The solution may further be that, as shown in fig. 6 to 8, the rotating base 330 includes a supporting tapered slot 331, a magnetic rolling slot 332, a first test slot 333, and a second switching slot 334, where the supporting tapered slot 331 and the magnetic rolling slot 332 are located on a bottom surface of the rotating base 330, the other side of the rotating base is provided with the first test slot 333 for placing the test tube 310, and the second switching slot 334 for placing the buffer tube 320, the supporting tapered slot 331 is tapered, and the supporting tapered slot 331 is adapted to the support sphere.
Further, the outer side of the bottom of the experimental container 100 is further provided with a connecting seat, the connecting seat is provided with threads, and the magnetic control part 150 is provided with a threaded hole corresponding to the threads.
Further, a corresponding conical seat 140 is arranged corresponding to the supporting conical groove 331, the conical seat 140 is provided with a supporting ball head, and the supporting ball body is used for supporting the rotating base 330.
Further, the magnetic member is a magnetic ball placed in the magnetic rolling groove 332.
A background compression 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 tube while communicating the first inlet 110 with the pressurizing means 400 and the second inlet 130 with the measuring means;
fixing the heparin pump and the experimental container pressure test device which are communicated with each other;
applying a simulated pressure to the test vessel 100 by the pressurizing device 400; at this time, the pressure inside the heparin pump 500 is increased, and the liquid level at the bottom of the extension tube is compressed to the upper part inside the outlet of the extension tube;
adjusting the switching by the switching means such that the test tube 310 is not aligned with said third outlet 130;
the bolus heparin pump 500 causes it to bolus a small portion of the fluid, with the heparin level again flush with the extension tube outlet.
Starting the bolus injection of the heparin pump 500, readjusting the switching device after the bolus 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 injection of the heparin pump 500 when the timing is finished; moving the measuring device away from the third inlet by the switching device;
and calculating the bolus speed of the heparin pump according to the bolus time and the acquired liquid weight and volume of the measuring device to judge whether the bolus speed conforms to the range value specified by the manufacturer.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention further adds a 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 present invention further provides for the adjustment of the background pressure by adding a switching device, namely the rotating base 330 and the buffer tube 320, to prevent the non-measured heparin from entering the test tube 310 when the heparin pump adjusts the level of the extension tube.
3. The rotating base 330 is a ball-type supporting structure, and has smaller friction force during rotation, thereby being 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 of the magnetic part and the magnetic control part, the steady-state pressure built inside the experimental container 100 does not need to be damaged, the mutual attraction of the magnetic materials controls the switching between the internal test tube 310 and the buffer tube 320 outside the experimental container 100, and meanwhile, the mutual attraction of the internal and external magnetic materials is also favorable for keeping the level and stability of the internal supporting surface.
It should be understood that the examples are merely for clearly illustrating the technical solutions of the present invention, and are not intended to limit the specific embodiments of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention claims should be included in the protection scope of the present invention claims.
Claims (8)
1. The background pressing die simulation test device for the accuracy of the flow of the heparin pump is provided with an experiment container, a pressurizing device and a measuring device and is used for measuring the injection accuracy of the heparin pump The measuring device is provided with a switching device corresponding to the test tube, and the switching device is used for changing the position of the test tube.
2. The heparin pump flow accuracy background pressure simulation test device according to claim 1, wherein the switching device is provided with a buffer tube, and the buffer tube is arranged on one side of the test tube.
3. The heparin pump flow accuracy background pressure simulation test device according to claim 2, wherein the switching device comprises a rotating base for placing and switching the test tube and the buffer tube, and the rotating base is rotatably connected with the bottom of the experimental container.
4. The heparin pump flow accuracy background pressure simulation test device according to claim 3, wherein a support ball is provided, a support cylindrical groove corresponding to the support ball is provided below the rotating base, the experimental container is provided with a tapered groove corresponding to the support ball, and the support and rotation of the rotating base at the bottom of the experimental container are realized through the support ball.
5. The heparin pump flow accuracy background pressure simulation test device according to claim 2, wherein the stand is used for connecting with a transfusion stand of a standard configuration of blood purification equipment.
6. The heparin pump flow accuracy background pressure simulation test device according to any one of claims 1-5, wherein the experimental container is a transparent container.
7. The heparin pump flow accuracy background pressure simulation test device according to any one of claims 1-5,
the first inlet, the second inlet and the third inlet are provided with luer connectors which are externally connected.
8. Background compression simulation method comprising a heparin pump flow accuracy simulation test device according to any of claims 2-5, wherein the method comprises:
connecting the third inlet with the heparin pump through an extension pipeline, and simultaneously enabling the first inlet to be communicated with the pressurizing device and the second inlet to be communicated with the measuring device;
fixing the heparin pump and the experimental container pressure test device which are communicated with each other;
applying a simulated pressure to the test container by a pressurizing device; at the moment, the air pressure in the heparin pump is increased, and the liquid level at the bottom of the extension pipe is compressed to the upper part of the interior 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 outlet;
pushing a heparin pump to push a small part of liquid, wherein the liquid level of the heparin is flushed with the outlet of the extension tube again;
starting the injection of the heparin pump, readjusting the switching device after the injection is stable to enable the test tube to be aligned below the outlet of the extension tube again, and starting timing;
stopping the bolus injection of the heparin pump when the timing is finished; moving the measuring device away from the third inlet by the switching device;
and calculating the bolus speed of the heparin pump according to the bolus time and the acquired liquid weight and volume of the measuring device to judge whether the bolus speed conforms to the range value specified by the manufacturer.
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| CN114563205A (en) * | 2022-04-28 | 2022-05-31 | 苏州恒瑞迦俐生生物医药科技有限公司 | Injection pump performance detection tool |
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| CN103175579A (en) * | 2013-03-14 | 2013-06-26 | 广东省医疗器械质量监督检验所 | Multi-channel pressurization flow test device and test method used for same |
| JP2017070605A (en) * | 2015-10-08 | 2017-04-13 | 学校法人早稲田大学 | Visualization test device and visualization test method of flow of blood purifier and holder used in the same |
| CN109847132A (en) * | 2019-03-13 | 2019-06-07 | 中国测试技术研究院辐射研究所 | Fluid flow caliberating device and method for hemodialysis machine detector |
| CN212674388U (en) * | 2020-08-13 | 2021-03-09 | 上海微创医疗器械（集团）有限公司 | Test equipment |
| CN216524276U (en) * | 2021-11-11 | 2022-05-13 | 广东省医疗器械质量监督检验所 | Heparin pump flow accuracy background mould simulation testing arrangement |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114563205A (en) * | 2022-04-28 | 2022-05-31 | 苏州恒瑞迦俐生生物医药科技有限公司 | Injection pump performance detection tool |
| CN114563205B (en) * | 2022-04-28 | 2022-07-29 | 苏州恒瑞迦俐生生物医药科技有限公司 | Medical injection pump performance detection tool |
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