Infusion pump test system based on liquid volatilization recovery compensation

Abstract

The utility model relates to the technical field of infusion pump testing, in particular to an infusion pump testing system based on liquid volatilization recovery compensation. Comprising a damping platform, an electronic balance, a beaker, a sealing piece, a first sealing cover, a liquid storage tank, a first connecting pipe, a third connecting pipe and an injection needle, the electronic balance and the liquid storage tank are arranged on the damping platform, a liquid outlet is formed in the lower end of the liquid storage tank, the liquid outlet of the liquid storage tank is communicated with the first connecting pipe, the beaker is placed on the electronic balance, and the electronic balance is covered with the first sealing cover. The beaker is located in the first sealing cover, a sealing piece is clamped at an opening in the upper end of the beaker, the third connecting pipe is communicated with the injection needle, the end, away from the third connecting pipe, of the injection needle sequentially penetrates through the first sealing cover and the sealing piece and then extends into the beaker, and an infusion pump is connected between the first connecting pipe and the third connecting pipe; the inaccurate liquid weight caused by liquid evaporation is prevented, so that the measurement error of the infusion pump test by using a weighing method is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of infusion pump testing, in particular to an infusion pump testing system based on liquid volatilization recovery compensation. Background Art

[0002] An infusion pump is a medical device that controls the number of infusion drops or the infusion flow rate to ensure that the drug can enter the patient's body at a uniform speed, accurate dosage, and safely. Infusion pumps are often used to strictly control the infusion volume and drug dosage. Therefore, the detection of infusion pumps requires the measurement and monitoring of injection accuracy to ensure the high injection accuracy of infusion pumps.

[0003] At present, the injection accuracy of infusion pumps is usually measured by weighing, which requires a high-precision balance (the accuracy of the balance is about 0.01 mg) for measurement, and catheters need to be connected to both the input and output ends of the infusion pump. The input end of the infusion pump is placed at different heights, and standard liquids such as normal saline are connected through the connected catheter. The catheter connected to the output end of the infusion pump is connected to a beaker, and the beaker is placed on a high-precision balance. The beaker and the liquid injected into it are weighed using a high-precision balance, and the average injection flow rate of the infusion pump within a certain period of time is calculated and compared with the nominal flow rate.

[0004] However, the current weighing method has the following problems: Since the infusion pump has high precision requirements, the total amount of liquid pumped into the beaker is relatively small. When weighing with a high-precision balance and testing in a non-confined space, liquid volatilization will cause relatively large weighing measurement errors. Some infusion pumps have a long weighing test time and may be tested continuously for more than 10 hours. The liquid evaporates more and the measurement error is relatively large.

[0005] Therefore, there is an urgent need to provide an infusion pump testing system based on liquid volatilization recovery compensation to recover the volatilized liquid, which can reduce the measurement error of the infusion pump compared to the prior art. Utility Model Content

[0006] The utility model solves the technical problems existing in the prior art and provides an infusion pump testing system based on liquid volatilization recovery compensation.

[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0008] A liquid infusion pump testing system based on liquid volatilization recovery compensation comprises a shock absorbing platform, an electronic balance, a beaker, a seal, a first sealing cover, a liquid storage tank, a first connecting tube, a third connecting tube and an injection needle, wherein the electronic balance and the liquid storage tank are both arranged on the shock absorbing platform, a liquid outlet is arranged at the lower end of the liquid storage tank, and the liquid outlet of the liquid storage tank is connected to the first connecting tube, the beaker is placed on the electronic balance, the first sealing cover is arranged on the electronic balance, the beaker is located inside the first sealing cover, the seal is clamped at the opening of the upper end of the beaker, the third connecting tube is connected to the injection needle, the injection needle passes through the first sealing cover and the seal in sequence at one end away from the third connecting tube and then extends into the inside of the beaker, and an infusion pump is connected between the first connecting tube and the third connecting tube.

[0009] Furthermore, the sealing member comprises a clamping portion and a recessed portion which are integrally connected, the clamping portion is clamped with the beaker, and the recessed portion extends into the interior of the beaker.

[0010] Furthermore, the lower wall of the recessed portion is configured to be in an arc shape.

[0011] Furthermore, the first connecting tube is connected to a dripping funnel at one end away from the liquid storage tank, the dripping funnel is connected to a second connecting tube at one end away from the first connecting tube, and the second connecting tube and the third connecting tube are connected to an infusion pump.

[0012] Furthermore, a second sealing cover is arranged on the shock absorbing platform, and the electronic balance, the beaker, the sealing member, the first sealing cover, the liquid storage tank, the first connecting pipe, the second connecting pipe, the injection needle and the liquid storage tank are all arranged inside the second sealing cover.

[0013] Furthermore, a humidity controller is disposed on the inner wall of the second sealing cover.

[0014] Furthermore, a temperature controller is provided on the inner wall of the second sealing cover.

[0015] Furthermore, the shock-absorbing platform includes a platform body, a first shock-absorbing component, a second shock-absorbing component and a third shock-absorbing component, the platform body includes a platform plate and four legs, the four legs are fixedly connected at the four corners of the lower wall of the platform plate; the first shock-absorbing component is arranged on the upper wall of the platform plate, and each of the legs is provided with a second shock-absorbing component at the lower end, and the third shock-absorbing component is arranged on the lower wall of the platform plate.

[0016] The first shock absorbing component is a shock absorbing pad, which is arranged to cover the upper wall of the platform plate and is made of silicone.

[0017] Furthermore, the second shock absorbing assembly includes a first screw and a base, the lower end of the first screw is fixedly connected to the base, the upper end of the first screw is threadedly connected to the leg, and the base is made of silicone.

[0018] Furthermore, the third shock absorbing assembly includes a bracket, a second screw, a spring, a connecting plate and a nut. The interior of the bracket is hollow, the connecting plate is arranged inside the bracket, the second screw passes through the connecting plate and the upper wall of the bracket, the spring is sleeved outside the second screw, and the spring is arranged between the connecting plate and the upper wall of the bracket. The second screw passes through one end of the bracket and is threadedly connected to the nut, and the second screw passes through one end of the nut and is threadedly connected to the platform plate.

[0019] Compared with the prior art, the beneficial effects of the utility model are:

[0020] (1) The utility model clamps a seal at the upper end of the beaker, and the lower wall of the recessed portion of the seal is arc-shaped, so that evaporated liquid can condense and flow into the beaker along the lower wall of the recessed portion, thereby preventing inaccurate electronic balance readings caused by liquid evaporation and reducing measurement errors of the infusion pump.

[0021] (2) The utility model uses a shock-absorbing platform to achieve a shock-absorbing effect, controls the temperature and humidity in the second sealing cover to remain constant, and considers various factors to further reduce the measurement error of the infusion pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0023] Figure 2 yes Figure 1 Enlarged view of point A in the middle.

[0024] Figure 3 yes Figure 1 Enlarged view of point B in the middle.

[0025] Description of reference numerals:

[0026] 1. Electronic balance; 2. Beaker; 3. Sealing member; 31. Clamping part; 32. Recessed part; 4. Infusion pump; 5. Injection needle; 6. First connecting tube; 7. Second connecting tube; 8. Third connecting tube; 9. Mounting seat; 10. First sealing cover; 11. Second sealing cover; 12. Humidity controller; 13. Temperature controller; 14. Drip bucket; 15. Shock-absorbing platform; 151. Platform body; 152. Shock-absorbing pad; 153. First screw; 154. Base; 155. Bracket; 156. Second screw; 157. Spring; 158. Connecting plate; 159. Nut; 16. Liquid storage tank. DETAILED DESCRIPTION

[0027] The technical solution of the utility model will be clearly described below in conjunction with the accompanying drawings. Obviously, the described embodiments are not all embodiments of the utility model. All other embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the utility model. It should be noted that the orientation or position relationship indicated by the terms "center", "up", "down", "left", "right", "vertical", "horizontal", etc. is based on the orientation or position relationship shown in the accompanying drawings. It is only for the convenience of describing the utility model and simplifying the description. It does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0028] like Figure 1 As shown, the utility model provides an infusion pump test system based on liquid volatilization recovery compensation, including a shock absorbing platform 15, an electronic balance 1, a beaker 2, a seal 3, a first sealing cover 10, a liquid storage tank 16, a drip bucket 14, a first connecting pipe 6, a second connecting pipe 7, a third connecting pipe 8 and an injection needle 5, the electronic balance 1 is placed on the shock absorbing platform 15, the beaker 2 is placed on the electronic balance 1, the electronic balance 1 is covered with a first sealing cover 10, the beaker 2 is located inside the first sealing cover 10, the seal 3 is clamped at the opening of the upper end of the beaker 2, the liquid storage tank 16 is connected to the shock absorbing platform 15 through a fixing frame, the lower end of the liquid storage tank 16 is provided with a liquid outlet, the upper end of the liquid storage tank 16 is provided with a liquid inlet, the liquid storage tank 16 is connected to the first connecting pipe 6 through the liquid outlet, and the first connecting pipe 6 is connected to the liquid storage tank 16 at one end away from the liquid storage tank 16 The drip bucket 14, the lower end of the drip bucket 14 is connected to the second connecting tube 7, the second connecting tube 7 is connected to the liquid inlet of the infusion pump 4 at one end away from the drip bucket 14, the liquid outlet of the infusion pump 4 is connected to the third connecting tube 8, the third connecting tube 8 is connected to the injection needle 5 at one end away from the infusion pump 4, and the injection needle 5 passes through the first sealing cover 10 and the sealing member 3 in sequence and then extends into the beaker 2; the infusion pump 4 is placed on the shock-absorbing platform 15 through a fixed frame, and the height settings of the liquid storage tank 16 and the infusion pump 4 are adjusted according to the test requirements. The fixed frame connected to the liquid storage tank 16 and the fixed frame connected to the infusion pump 4 are not shown in the figure. The two fixed frames can realize the height settings of the liquid storage tank 16 and the infusion pump 4 and realize the placement of the liquid storage tank 16 and the infusion pump 4 on the shock-absorbing platform 15 through the two fixed frames. The structure of the fixed frame is not specifically limited.

[0029] The sealing member 3 comprises a snap-fitting portion 31 and a recessed portion 32, wherein the snap-fitting portion 31 is integrally connected to the recessed portion 32, wherein the lower wall of the recessed portion 32 is arc-shaped, and the recessed portion 32 is recessed toward the bottom of the beaker 2, so that the volatilized liquid in the beaker 2 can be condensed on the lower wall of the recessed portion 32, and the condensed liquid can flow into the beaker 2 along the lower wall of the recessed portion 32, thereby avoiding volatilization of the liquid in the beaker 2 and reducing the liquid in the beaker 2, and thus effectively reducing the measurement error of the infusion pump 4.

[0030] A mounting seat 9 is provided at the upper end of the electronic balance 1 , and a groove is provided at the upper end of the mounting seat 9 . The beaker 2 is placed inside the groove. The groove is provided to facilitate the beaker 2 to be stably placed on the electronic balance 1 .

[0031] like Figure 1 , Figure 2 , Figure 3 As shown, the shock absorbing platform 15 includes a platform body 151, a first shock absorbing assembly, a second shock absorbing assembly and a third shock absorbing assembly. The platform body 151 includes a platform plate and four legs. The four legs are fixedly connected to the four corners of the lower wall of the platform plate. The first shock absorbing assembly is arranged on the upper wall of the platform plate. The lower end of each leg of the platform body 151 is connected to a second shock absorbing assembly. The third shock absorbing assembly is arranged on the lower wall of the platform plate. Four third shock absorbing assemblies are arranged. The four third shock absorbing assemblies are arranged close to the four legs. The first shock absorbing assembly and the third shock absorbing assembly are used to disperse the vibration of the platform plate, and the second shock absorbing assembly is used to disperse the vibration of the legs.

[0032] The first shock-absorbing component is a shock-absorbing pad 152 . The shock-absorbing pad 152 is fixedly connected to the upper wall of the platform body 151 . The shock-absorbing pad 152 is made of silicone. The shock-absorbing pad 152 covers the upper wall of the platform body 151 .

[0033] The second shock absorbing assembly includes a first screw rod 153 and a base 154 . The lower end of the first screw rod 153 is fixedly connected to the base 154 . The upper end of the first screw rod 153 extends into the interior of the leg. The first screw rod 153 is threadedly connected to the leg. The base 154 is made of silicone.

[0034] The third shock absorbing assembly includes a bracket 155, a second screw rod 156, a spring 157, a connecting plate 158 and a nut 159. The bracket 155 is a structure with a hollow interior and a group of opposite side walls as openings. The connecting plate 158 is arranged inside the bracket 155. The second screw rod 156 passes through the connecting plate 158 and the upper wall of the bracket 155 in sequence. The spring 157 is fixedly connected between the upper wall of the connecting plate 158 and the upper wall of the bracket 155. The spring 157 is sleeved on the outside of the second screw rod 156. The second screw rod 156 passes through the external thread connection nut 159 of the bracket 155. The second screw rod 156 passes through one end of the bracket 155 and extends into the interior of the platform plate. The second screw rod 156 is threadedly connected to the platform plate.

[0035] The second sealing cover 11 is provided on the wall of the shock-absorbing platform 15, and the electronic balance 1, beaker 2, seal 3, first sealing cover 10, liquid storage tank 16, drip bucket 14, first connecting tube 6, second connecting tube 7, third connecting tube 8 and injection needle 5 are all located inside the second sealing cover 11. The inner wall of the second sealing cover 11 is provided with a humidity controller 12 and a temperature controller 13. The humidity controller 12 is used to control the humidity inside the second sealing cover 11 to be constant at the humidity setting value, and the temperature controller 13 is used to control the temperature inside the second sealing cover 11 to be constant at the temperature setting value. The humidity controller 12 and the temperature controller 13 are both existing, and the specific humidity adjustment and temperature adjustment methods are all existing technologies, which will not be repeated here. The first sealing cover 10 is provided with a breathable film to prevent the evaporation of the liquid, and can also adjust the air pressure inside and outside the first sealing cover to maintain normal atmospheric pressure to avoid affecting the dripping of the liquid of the infusion pump 4.

[0036] The utility model provides an infusion pump testing system based on liquid volatilization recovery compensation and its working principle: the humidity in the second sealing cover 11 is adjusted to a humidity setting value through a humidity controller 12, the temperature in the second sealing cover 11 is adjusted to a temperature setting value through a temperature controller 13, the infusion pump 4 is started, the infusion pump 4 pumps the liquid in the liquid storage tank 16 into the beaker 2, and after the infusion pump 4 starts for a set time, the infusion pump 4 is stopped, the reading of the electronic balance 1 is read, and the flow rate of the infusion pump 4 is measured by weighing method.

[0037] The utility model clamps the sealing member 3 at the upper end of the beaker 2, and the lower wall of the recessed portion 32 of the sealing member 3 is arc-shaped, so that the evaporated liquid can condense and flow into the beaker 2 along the lower wall of the recessed portion 32, thereby preventing the inaccurate reading of the electronic balance 1 caused by the evaporation of the liquid. The shock-absorbing platform 15 is used to achieve a shock-absorbing effect, and the temperature and humidity in the second sealing cover 11 are controlled to remain constant, which can effectively reduce the measurement error of the infusion pump 4.

[0038] Finally, it should be noted that the above content is only used to illustrate the technical solution of the utility model, rather than to limit the protection scope of the utility model. Simple modifications or equivalent substitutions of the technical solution of the utility model by ordinary technicians in this field do not deviate from the essence and scope of the technical solution of the utility model.

Claims

1. An infusion pump testing system based on liquid volatilization recovery compensation, characterized in that: The electronic balance comprises a shock absorbing platform, an electronic balance, a beaker, a sealing member, a first sealing cover, a liquid storage tank, a first connecting tube, a third connecting tube and an injection needle. The electronic balance and the liquid storage tank are both arranged on the shock absorbing platform. A liquid outlet is arranged at the lower end of the liquid storage tank, and the liquid outlet of the liquid storage tank is connected to the first connecting tube. The beaker is placed on the electronic balance, and the first sealing cover is arranged on the electronic balance. The beaker is located inside the first sealing cover, and the sealing member is clamped at the opening of the upper end of the beaker. The third connecting tube is connected to the injection needle, and one end of the injection needle away from the third connecting tube passes through the first sealing cover and the sealing member in sequence and then extends into the inside of the beaker. An infusion pump is connected between the first connecting tube and the third connecting tube.

2. The infusion pump test system based on liquid volatilization recovery compensation according to claim 1 is characterized in that: The sealing member comprises a clamping portion and a recessed portion which are integrally connected, the clamping portion is clamped with the beaker, and the recessed portion extends into the interior of the beaker.

3. The infusion pump testing system based on liquid volatilization recovery compensation according to claim 2 is characterized in that: The lower wall of the recessed portion is configured in an arc shape.

4. The infusion pump testing system based on liquid volatilization recovery compensation according to claim 1 is characterized in that: The first connecting tube is connected to a dripping funnel at one end away from the liquid storage tank, the dripping funnel is connected to a second connecting tube at one end away from the first connecting tube, and the second connecting tube and the third connecting tube are connected to an infusion pump.

5. The infusion pump testing system based on liquid volatilization recovery compensation according to claim 1, characterized in that: A second sealing cover is arranged on the shock absorbing platform, and the electronic balance, the beaker, the sealing member, the first sealing cover, the liquid storage tank, the first connecting pipe, the third connecting pipe, the injection needle and the liquid storage tank are all arranged inside the second sealing cover.

6. The infusion pump testing system based on liquid volatilization recovery compensation according to claim 5, characterized in that: The inner wall of the second sealing cover is provided with a humidity controller.

7. The infusion pump testing system based on liquid volatilization recovery compensation according to claim 5, characterized in that: A temperature controller is arranged on the inner wall of the second sealing cover.

8. The infusion pump testing system based on liquid volatilization recovery compensation according to claim 1, characterized in that: The shock absorbing platform comprises a platform body, a first shock absorbing assembly, a second shock absorbing assembly and a third shock absorbing assembly. The platform body comprises a platform plate and four legs. The four legs are fixedly connected at the four corners of the lower wall of the platform plate. The first shock absorbing assembly is arranged on the upper wall of the platform plate, and the lower end of each leg is provided with a second shock absorbing assembly. The third shock absorbing assembly is arranged on the lower wall of the platform plate. The first shock absorbing component is a shock absorbing pad, which is arranged to cover the upper wall of the platform plate and is made of silicone.

9. The infusion pump test system based on liquid volatilization recovery compensation according to claim 8, characterized in that: The second shock-absorbing assembly includes a first screw and a base, the lower end of the first screw is fixedly connected to the base, the upper end of the first screw is threadedly connected to the leg, and the base is made of silicone.

10. The infusion pump testing system based on liquid volatilization recovery compensation according to claim 8, characterized in that: The third shock absorbing assembly includes a bracket, a second screw, a spring, a connecting plate and a nut. The interior of the bracket is hollow, the connecting plate is arranged inside the bracket, the second screw passes through the connecting plate and the upper wall of the bracket, the spring is sleeved outside the second screw, and the spring is arranged between the connecting plate and the upper wall of the bracket. The second screw passes through one end of the bracket and is threadedly connected to the nut, and the second screw passes through one end of the nut and is threadedly connected to the platform plate.

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