Blood return prevention test device for transfusion product

Abstract

The utility model belongs to the field of medical instruments, and relates to a transfusion product blood return prevention test device which comprises a base, a support fixedly connected to the base, a top cover fixedly connected to the top end of the support, a test bed fixedly connected to the support, and a peristaltic pump, a pulse pressure maintainer and a confluence bottle arranged on the test bed. A pulse pressure indicating tube and a heparin cap are arranged on the confluence bottle, and the peristaltic pump, the pulse pressure maintainer and the confluence bottle are connected through hoses to jointly form the venous transfusion simulation experiment device. According to the utility model, the transfusion state of a human body can be simulated through an assembled instrument, whether a transfusion product cannot be emptied or a transfusion device has a blood return phenomenon at the last stage of transfusion due to package springback in the transfusion process is detected, and the dripping speed of the transfusion product is recorded as test data.

Description

Technical Field

[0001] The utility model belongs to the field of medical devices and relates to an anti-backflow test device for infusion products. Background Art

[0002] Medical infusion soft bags and plastic bottle packages have flexibility and resilience, and can adapt to different storage and transportation conditions. They are currently widely used in clinical infusion and have become one of the mainstream ways of infusion packaging. When using infusion products with such packaging for infusion, at the end of infusion, it may be impossible to completely drain due to the reduction of the pressure in the bag, or blood may flow back into the infusion set.

[0003] The existing Chinese invention patent with the patent number CN102488942A, a blood return test method and its blood return test device include an infusion bottle or infusion bag, an infusion tube, a Murphy's dropper, and a drip rate regulator, which are connected according to the infusion standard. The blood return test device is provided with a venous blood vessel simulation device, and the needle on the infusion tube is inserted into the venous blood vessel simulation device; a transducer with a diameter larger than that of the infusion tube is arranged on the infusion tube, the transducer is placed horizontally, and a transparent liquid column is arranged on the transducer and is erected and communicated with the transducer. Content of the Utility Model

[0004] The technical problem to be solved by the utility model is that the prior art cannot visually observe the blood return phenomenon, and the artificial visual observation method with large errors is adopted to detect the drip rate of the infusion product. Now, the deficiencies of the prior art are overcome, and an anti-backflow test device for infusion products is provided to simulate the state of intravenous infusion and directly judge whether blood returns by observing whether the dyed water flows back into the infusion set.

[0005] The anti-backflow test device for infusion products of the utility model includes a base, a bracket is fixedly connected to the base, a top cover is fixedly connected to the top of the bracket, a plurality of hooks are arranged on the top cover, a test bench is fixedly connected to the bracket, a peristaltic pump, a pulse pressure maintainer and a confluence bottle are arranged on the test bench, a pulse pressure indicating tube and at least one heparin cap are arranged on the confluence bottle, and the peristaltic pump, the pulse pressure maintainer and the confluence bottle are connected by hoses to jointly form a venous infusion simulation experiment device.

[0006] Working Process or Principle:

[0007] When in use, first hang the infusion product on the hook of the top cover, then insert the needle of the infusion set connected to the infusion product into the heparin cap to connect the confluence bottle, use a hose to connect the confluence bottle, the pulse pressure maintainer, and the peristaltic pump in sequence, connect the waste liquid port of the pulse pressure maintainer to the waste liquid pipeline, continue to add dyed water to the inner tube of the pulse pressure maintainer, turn on the peristaltic pump, and accelerate the unidirectional flow of dyed water. First, the dyed water in the inner tube of the pulse pressure maintainer flows unidirectionally to the confluence bottle through the hose, and the dyed water in the confluence bottle continues to increase. Using the principle of the communicating vessel, the liquid level in the pulse pressure indicator tube of the confluence bottle continues to rise until it is flush with the liquid level in the inner tube of the pulse pressure maintainer. The dyed water in the confluence bottle flows from another interface tube through the peristaltic pump until it flows back into the pulse pressure maintainer. Adjust the speed of the peristaltic pump so that the fluctuation rate of the liquid level in the pulse pressure indicator tube is approximately equal to the human pulse rate, and turn on the infusion switch to perform the anti-blood return test.

[0008] The pulse pressure maintainer is an embedded double-tube structure, the inner tube of the pulse pressure maintainer is connected to the two sides of the confluence bottle through interfaces on both sides, the inner tube of the pulse pressure maintainer passes through the outer tube of the pulse pressure maintainer, the inner tube mouth is higher than the outer tube of the pulse pressure maintainer, the excess liquid in the inner tube of the pulse pressure maintainer overflows to the outer tube of the pulse pressure maintainer through the mouth, the outer tube of the pulse pressure maintainer is used to store waste liquid, and the excess waste liquid is discharged by connecting the waste liquid pipe through the interface pipe; the inner tube of the embedded double-tube pulse pressure maintainer and the liquid level of the pulse pressure indicator tube of the confluence bottle are kept at the same height through the principle of a communicating vessel; the pulse pressure maintainer is a combination of a straight condenser and a T-tube, the T-tube is connected to the condenser, and the confluence bottle and the T-tube are connected by a hose.

[0009] The bracket is provided with a telescopic structure, and a scale is provided on the telescopic structure. The bracket may also be provided with a scale compatible with the telescopic structure. The telescopic structure can be adjusted in height so that the infusion port of the infusion product and the injection site of the heparin cap of the confluence bottle are kept at a distance of 90 cm, which is used to simulate the height difference between the injection site of the human body and the infusion product.

[0010] The telescopic structure includes an adjusting rod slidably connected to the bracket, a locking piece corresponding to the adjusting rod is provided on the bracket, and a top cover is arranged on the top of the adjusting rod. The distance between the infusion product and the test bench can be adjusted by the adjusting rod, so as to better.

[0011] The locking piece can be a marble through hole, a tightening bolt, a threaded locking structure, etc., which belongs to the prior art.

[0012] The bracket is provided with a drop count tester, and the infusion device drop bucket is placed in the drop count tester. For some special liquid medicines, the number of drops and the speed of the liquid medicine need to be strictly controlled and recorded. The existing method of manually recording and visually observing the number of drops and the speed of the liquid medicine is often used. However, on the one hand, this method has a large error. By using the drop count tester, the number of drops of the drip can be automatically counted. The drop count tester is a prior art.

[0013] The test bench is provided with a wire bundler, and when there are many infusion products to be tested, the wire bundler can be used to organize and bundle each wire tube.

[0014] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0015] The utility model can simulate the human body infusion state by assembling instruments, detect whether the infusion product has the phenomenon of incomplete drainage at the end of infusion or blood backflow in the infusion set due to the packaging rebound during the infusion process, and record the drip rate of the infusion product as test data. Description of the Drawings

[0016] Figure 1 is a schematic structural diagram of an embodiment of the utility model,

[0017] Figure 2 is Figure 1 the enlarged view of part A in

[0018] Figure 3 is Figure 1 the enlarged view of part B in

[0019] In the figure: 1, top cover; 2, infusion product; 3, drip number tester; 4, drip chamber of the infusion set; 5, peristaltic pump; 6, test bench; 7, bracket; 8, base; 9, hose; 10, pulse pressure maintainer; 11, wire bundler; 12, heparin cap; 13, confluence bottle; 14, pulse pressure indicating tube; 15, adjusting rod; 16, locking part. Detailed Embodiment

[0020] Embodiment 1

[0021] As Figures 1 to 3 shown, the anti-blood backflow test device for the infusion product 2 of the utility model includes a base 8, a bracket 7 is fixedly connected to the base 8, a top cover 1 is fixedly connected to the top of the bracket 7, a plurality of hooks are arranged on the top cover 1, a test bench 6 is fixedly connected to the bracket 7, a peristaltic pump 5, a pulse pressure maintainer 10 and a confluence bottle 13 are arranged on the test bench 6, a pulse pressure indicating tube 14 and at least one heparin cap 12 are arranged on the confluence bottle 13, and the peristaltic pump 5, the pulse pressure maintainer 10 and the confluence bottle 13 are connected by a hose 9 to jointly form a venous infusion simulation experiment device;

[0022] The described pulse pressure maintainer 10 has an embedded double-tube structure. The inner tube of the pulse pressure maintainer 10 is connected to both sides of the confluence bottle 13 through the interfaces on both sides. The inner tube of the pulse pressure maintainer 10 penetrates through the outer tube of the pulse pressure maintainer 10, and the orifice of the inner tube is higher than the outer tube of the pulse pressure maintainer 10. The excess liquid in the inner tube of the pulse pressure maintainer 10 overflows to the outer tube of the pulse pressure maintainer 10 through the orifice. The outer tube of the pulse pressure maintainer 10 is used to store waste liquid, and the excess waste liquid is discharged through the interface tube connected to the waste liquid tube. The liquid level of the inner tube of the embedded double-tube pulse pressure maintainer 10 and the pulse pressure indicating tube 14 of the confluence bottle 13 remains at the same height through the principle of the communicating vessel. The outer tube stores waste liquid and is externally connected to the waste liquid tube to discharge the excess waste liquid; A telescopic structure is provided on the described bracket 7, a scale is provided on the telescopic structure, and the telescopic structure can be adjusted in height so that the infusion port of the infusion product 2 is kept at a distance of 90 cm from the injection site of the heparin cap 12 of the confluence bottle 13, for simulating the height difference between the human injection site and the infusion product 2; The telescopic structure includes an adjusting rod 15 slidably connected inside the bracket 7, a locking member 16 corresponding to the adjusting rod 15 is provided on the bracket 7, and the top cover 1 is arranged at the top of the adjusting rod 15. The distance between the infusion product 2 and the test bench can be adjusted through the adjusting rod 15, so as to better simulate the height during human injection; The locking member 16 can be structures such as a ball through hole, a tightening bolt, a threaded locking, etc., which belong to the prior art; A drip rate tester 3 is provided on the described bracket 7, and the drip chamber 4 of the infusion set is placed inside the drip rate tester 3. For some special medicinal liquids, the drip rate of the dripping medicine and the speed of the medicinal liquid need to be strictly controlled and recorded. Currently, the drip rate of the dripping medicine and the speed of the medicinal liquid often adopt the method of manual recording and visual observation. However, on the one hand, this method has a large error. By using the drip rate tester 3, the drip rate of the drip can be automatically counted; A wire bundler 11 is provided on the test bench 6. When there are more infusion products 2 to be tested, the wire bundler 11 can be used to organize and bundle each wire tube.

[0023] Working process or working principle:

[0024] First, assemble the instrument. Hang the infusion product 2 on the hook of the top cover 1, adjust the height of the bracket 7 and the adjusting rod 15 so that the bottle mouth of the infusion product 2 and the heparin cap 12 of the confluence bottle 13 maintain a certain vertical height. Insert the needle of the infusion set connecting the infusion product 2 into the heparin cap 12 to connect the confluence bottle 13. Connect the pulse pressure maintainer 10, the confluence bottle 13, and the peristaltic pump 5 with a flexible tube 9. Connect the waste liquid port of the outer tube of the pulse pressure maintainer 10 to the waste liquid pipeline.

[0025] During use, continuously add dyed water into the inner tube of the pulse pressure maintainer 10, turn on the peristaltic pump 5 to accelerate the one-way flow of the dyed water. The dyed water in the inner tube of the pulse pressure maintainer 10 flows through the hose to the confluence bottle 13. The dyed water in the confluence bottle 13 continuously increases. Using the principle of communicating vessels, the liquid level in the pulse pressure indicating tube 14 of the confluence bottle 13 continuously rises until the liquid levels in the pulse pressure maintainer 10 and the pulse pressure indicating tube 14 of the confluence bottle 13 are flush. The dyed water in the confluence bottle 13 flows through the hose from another interface tube through the peristaltic pump 5 until it flows back into the pulse pressure maintainer 10. Adjust the rotation speed of the peristaltic pump 5 so that the undulation rate of the liquid level in the pulse pressure indicating tube 14 is approximately equal to the human pulse rate, and then turn on the infusion switch to conduct the anti-backflow test. During the experiment, the drip counter 3 can automatically count the number of drops of the drip.

[0026] The utility model can simulate the human body infusion state by assembling the instrument, detect whether the infusion product has the phenomenon of incomplete drainage or backflow of the infusion set at the end of infusion due to packaging rebound during the infusion process, and record the drip rate of the infusion product as test data.

[0027] In the utility model, the description of the direction and relative position relationship of the structure, such as the description of front, back, left, right, up and down, does not constitute a limitation to the utility model, but is only for the convenience of description.

Claims

1. An anti-backflow test device for an infusion product, comprising a base (8), a bracket (7) fixedly connected to the base (8), a top cover (1) fixedly connected to the top of the bracket (7), and a plurality of hooks provided on the top cover (1), characterized in that: A test bench (6) is fixedly connected to the described bracket (7). A peristaltic pump (5), a pulse pressure maintainer (10) and a collection bottle (13) are arranged on the test bench (6). A pulse pressure indicating tube (14) and at least one heparin cap (12) are arranged on the collection bottle (13). The peristaltic pump (5), the pulse pressure maintainer (10) and the collection bottle (13) are connected by a hose (9).

2. The infusion product anti-backflow test device according to claim 1, characterized in that: The described pulse pressure maintainer (10) is an embedded double-tube structure. The inner tube of the pulse pressure maintainer (10) is connected to the hose (9) through two interfaces at the bottom and is respectively communicated with the two interfaces on both sides of the collection bottle (13).

3. The infusion product anti-backflow test device according to claim 2, characterized in that: The described bracket (7) is provided with a telescopic structure, and a scale is arranged on the telescopic structure.

4. The infusion product anti-backflow test device according to claim 3, characterized in that: The telescopic structure includes an adjusting rod (15) slidably connected in the bracket (7). A locking member (16) corresponding to the adjusting rod (15) is arranged on the bracket (7). The top cover (1) is arranged at the top of the adjusting rod (15).

5. The infusion product anti-backflow test device according to any one of claims 1-4, characterized in that: A drip rate tester (3) is arranged on the described bracket (7).

6. The infusion product anti-backflow test device according to claim 5, wherein: A wire bundler (11) is arranged on the described test bench (6).

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