Catheter negative pressure tester

Abstract

According to the catheter negative pressure tester, a platform plate is provided with a placement seat and a partition plate which are used for vertically and fixedly placing a catheter, a pipeline used for water injection is arranged in the placement seat, the partition plate is used for being in lap joint with the top of the catheter, and when water is injected into the catheter, overflowed water cannot fall back to the catheter after the end of the catheter is filled with the water; the influence on the subsequent observation of the appearance of the conduit is avoided. The open end of the glass bottle for the negative pressure test is matched with the placing seat, so that the internal environment can be relatively closed, and the accuracy of the experimental environment is ensured. According to the catheter negative pressure tester, a plurality of testing steps of catheter water injection sealing, negative pressure applying, observation and the like are integrated on one device, the testing process is remarkably simplified, tool switching and time consumption of operators are reduced, and therefore the testing efficiency of hemodialysis catheters is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to dialysis catheter testing device technical field, specifically a catheter negative pressure tester. BACKGROUND

[0002] Hemodialysis catheter is the central venous catheter for hemodialysis treatment, as the vascular access of hemodialysis patient, its main role is to guide blood into dialysis machine to carry out purification treatment, then the purified blood is back to the patient's body. To ensure the normal function of hemodialysis catheter, various performance detection tests need to be carried out before use, for example, negative pressure test in medical industry standard, which needs the operator to manually use the syringe to inject water into the catheter, then put the catheter with water into the sealed container, draw the specified negative pressure on the container, and observe whether it leaks after a period of time. The overall operation needs to use a variety of devices, there is no special equipment for hemodialysis catheter negative pressure test, which reduces the test efficiency and test quality to some extent. SUMMARY

[0003] The utility model discloses a kind of catheter negative pressure testers, can complete the water injection sealing inside catheter and draw negative pressure observation operation on a device, improve test efficiency and test quality, solve the problems in the prior art.

[0004] The utility model discloses a technical scheme that solves its technical problem is: the catheter negative pressure tester, including the platform board, is installed with the vertical arrangement baffle on the platform board, is seted up with the recess that cooperates with the catheter on the top of baffle, installs the placing seat on the platform board of baffle front side, and the detachable conical base is installed with cooperation in placing seat, and one side of the big end surface of conical base is equipped with two groups of water pipes, and all the water pipes are provided with switch valves, and one side of the small end surface of conical base is equipped with two groups of water delivery pipes that are communicated with water pipe, the double -end one end of water delivery pipe and catheter cooperation, install the water supply pipe that is communicated with water pipe in placing seat, and the water treatment box body of top opening is installed on the platform board of baffle rear side, and the water treatment box body is equipped with recovery water tank and water supply tank, wherein recovery water tank is located at the downside position of recess, and water pump is arranged in water supply tank, and the water outlet of water pump is communicated with water supply pipe, and the position corresponding to recess, still be equipped with the water stop clamp of baffle rear side, and the single -end one end of catheter can be held in water stop clamp, after the catheter is installed to conical base, water pump starts and can fill the inside of catheter with bubble -free water, and still install negative pressure vacuum pump, pressure gauge, timer and one end opening glass bottle on the platform board, and the opening one end of conical base and glass bottle cooperation, install pressure detection probe in glass bottle, and pressure detection probe is connected with pressure gauge through control circuit, and the air inlet of negative pressure vacuum pump is communicated with the inner chamber of glass bottle through pipeline, after filling bubble -free water and closing both ends of catheter, conical base can drive catheter and put into glass bottle and close together, and negative pressure vacuum pump starts and can exert negative pressure to the catheter in glass bottle. The outer periphery of conical base is equipped with annular sealing ring, and the ring is arranged on one side of the big end surface of conical base, and the water pipe is located in the ring, and the outer periphery of ring is equipped with circumferentially arranged friction protrusions. The front side of baffle is installed with several catheter fixing devices, and each catheter fixing device includes a long strip and a locking strip, wherein the end surface of the long strip is provided with a magic tape hook surface, and the locking strip is provided with a magic tape fluff surface adhered to the magic tape hook surface, and each pipeline of the catheter is wrapped and fixed by the long strip. The rear side of the baffle is provided with a catheter pressing device, which includes a rotatable circular plate, an extending connecting rod provided on the circular plate, a cover installed at the end of the connecting rod, a torsion spring installed between the circular plate and the baffle, and the torsion spring always has a tendency to rotate the circular plate to close the recess with the cover. The rear side of the baffle is provided with a sliding groove frame matched with the water stop clamp, the sliding groove frame is inclinedly arranged towards the recess position, the bottom of the sliding groove frame is closed, the upper part of the sliding groove frame is open, and a long slot is formed on the outer side of the sliding groove frame.

[0005] The positive effects of this invention are as follows: The catheter negative pressure tester of this invention has a platform plate with a placement seat and partition for vertically fixing the catheter. The placement seat contains a water injection pipe, and the partition overlaps the top of the catheter. When water is injected into the catheter, the water overflowing from the end of the catheter will not fall back onto the catheter, avoiding any impact on subsequent observation of the catheter's appearance. The glass bottle used for negative pressure testing has its open end fitted with the placement seat, achieving a relatively sealed internal environment to ensure the accuracy of the experimental environment. This catheter negative pressure tester of this invention integrates multiple testing steps, such as catheter water injection and sealing, negative pressure application, and observation, into a single device, significantly simplifying the testing process, reducing tool switching and time consumption for operators, and thus greatly improving the testing efficiency of hemodialysis catheters. By utilizing a precise negative pressure vacuum pump, pressure gauge, and quantifiable timer, the standardization and consistency of negative pressure testing are ensured. Compared with traditional manual operation, it can more accurately reflect the performance status of the catheter, improving the accuracy and reliability of test results. The implementation of this testing instrument helps to promote the standardization of hemodialysis catheter testing procedures, providing a unified and efficient testing platform for medical institutions and manufacturers, and is conducive to improving the quality control level of the entire industry. Attached Figure Description

[0006] Figure 1 This is a schematic diagram of the structure of this utility model;

[0007] Figure 2 yes Figure 1 The left view;

[0008] Figure 3 yes Figure 1 Top view;

[0009] Figure 4 yes Figure 1 A partial view of the rear view;

[0010] Figure 5 This is a schematic diagram of the conical base.

[0011] Figure 6 yes Figure 1 An enlarged view of the sectional view along the AA direction;

[0012] Figure 7 This is a schematic diagram showing the state of the tube after it has been filled with deaerated water and placed into a glass bottle. Detailed Implementation

[0013] The catheter negative pressure tester described in this utility model, such as Figures 1-4As shown, including the platform plate 1, the vertical arrangement of the partition plate 2 is installed on the platform plate 1, the top of the partition plate 2 is provided with a groove 3 matched with the catheter, the partition plate 2 is used to support the catheter to be tested and maintain the vertical state, and at the same time provide support for the upper end of the catheter, so that the single head of the catheter overlaps on the groove 3, and the pipe body and the catheter outlet are located on both sides of the partition plate 2, avoiding the overflow of the subsequent full water to the pipe body, affecting the observation during the subsequent negative pressure test.

[0014] In order to realize the vertical installation of the catheter, the placing seat 4 is installed on the platform plate 1 in front of the partition plate 2, the detachable conical base 5 is matched and installed in the placing seat 4, the large end face of the conical base 5 is arranged downward, and the small end face of the conical base 5 is arranged upward. One side of the large end face of the conical base 5 is provided with two groups of water inlet pipes 6, and each water inlet pipe 6 is provided with a switch valve 7, so that the water inlet pipe 6 can be realized by controlling the switch valve 7. The on-off of the water inlet pipe 6, one side of the small end face of the conical base 5 is provided with two groups of water delivery pipes 8 which are communicated with the water inlet pipes 6, and the water delivery pipes 8 are matched with the double-end of the catheter.

[0015] The double-end of the hemodialysis catheter can be positioned and installed on the water delivery pipe 8, and the single-end of the hemodialysis catheter can be overlapped on the groove 3 on the top of the partition plate 2, so as to realize the vertical arrangement of the catheter and the water injection, so that the liquid level in the catheter can gradually rise from the bottom of the catheter to the water outlet end of the single head, the air with lighter quality is squeezed from bottom to top, so as to completely exhaust the air in the catheter.

[0016] In order to realize the water injection operation to the inside of the catheter to be tested, the water delivery pipe 9 which is communicated with the water inlet pipe 6 is installed in the placing seat 4, and after the conical base 5 is matched and installed in the placing seat 4, the water delivery pipe 9 can be connected with the water inlet pipe 6. The platform plate 1 behind the partition plate 2 is provided with a water treatment box 31 with an open top, the water treatment box 31 is provided with a water recovery tank 32 and a water supply tank 10, wherein the water recovery tank 32 is located on the lower side of the groove 3 and can receive the water overflowed from the catheter to realize effective recovery. The water pump 11 is arranged in the water supply tank 10, and the water outlet of the water pump 11 is communicated with the water delivery pipe 9. The water supply tank 10 is filled with bubble-free water, which can be injected into the catheter to be tested from bottom to top by the water pump 11.

[0017] Corresponding to the position of the groove 3, a water stop clamp 12 is also arranged on the rear side of the partition plate 2, which can clamp the single-end of the catheter to realize the closure of the water outlet end of the catheter. The double-end of the catheter to be tested is provided with a flow stop clamp which can open and close the pipeline, after the catheter is filled with water, the two ends of the catheter can be clamped and closed respectively to form a closed state of full water, so as to facilitate the subsequent negative pressure test. The water stop clamp 12 can be a clinical water stop clamp disclosed in Chinese patent No. CN201822103357.9, which can realize the closure of the catheter.

[0018] In order to realize the negative pressure test on the catheter to be tested, a negative pressure vacuum pump 14, a pressure gauge 15, a timer 16 and an open-ended glass bottle 13 are also installed on the platform plate 1, the conical base 5 is matched with the open end of the glass bottle 13, the catheter is filled with bubble-free water and the two ends are closed, the conical base 5 can drive the catheter to be put into the glass bottle 13 and closed together, the negative pressure vacuum pump 14 can apply negative pressure to the catheter in the glass bottle 13, the conical base 5 can be used as a mounting base when the catheter is filled with water, and also can be used as a plugging device for the open end of the glass bottle 13 during the negative pressure test, after the catheter is filled with water, it does not need to be removed from the conical base 5, and can be put into the glass bottle 13 together with the conical base 5 and matched and installed by the conical base 5 to ensure that a relatively closed environment is formed in the glass bottle 13.

[0019] A pressure detection probe 17 is installed in the glass bottle 13, the pressure detection probe 17 is connected with the pressure gauge 15 through a control line, the suction port of the negative pressure vacuum pump 14 is connected with the inner cavity of the glass bottle 13 through a pipeline, different negative pressure environments can be set according to different test requirements, and feedback can be obtained from the pressure gauge 15, whether the catheter to be tested leaks water within a certain time can be observed by the timer 16, so as to judge whether the catheter is qualified.

[0020] When the catheter negative pressure tester is used for negative pressure test on the dialysis catheter, first, the double-end one end of the catheter to be tested is installed on the water delivery pipe 8, the single-end one end of the catheter is placed in the groove 3 on the top of the partition plate 2, the water outlet one end of the catheter is located on the upper side of the recovered water tank 32, and the catheter body and the water outlet one end are located on the two sides of the partition plate 2 respectively, then the switch valve 7 is opened and the water pump 11 is started, bubble-free water is injected into the catheter to be tested, when the single-end one end of the catheter overflows, it indicates that the catheter is filled with water, the water pump 11 is stopped, then the single-end one end of the catheter is clamped and closed by the water clamp 12, the double-end one end of the catheter is also closed by the self-provided water clamp, the conical base 5 is taken off from the placing seat 4, the catheter filled with water is put into the glass bottle 13 together, and the open end of the glass bottle 13 is closed by the conical base 5, the switch valve 7 is closed, then the negative pressure vacuum pump 14 is started, the negative pressure environment in the glass bottle 13 is adjusted to a specified pressure according to the display value of the pressure gauge 15, the negative pressure duration is set by the timer 16, after the negative pressure environment is maintained for a set time period, the surface of the catheter to be tested is observed by the worker to see whether there is water leakage, if there is water leakage, the catheter is unqualified, if there is no water leakage, it indicates that the catheter meets the negative pressure test.

[0021] In order to further realize the sealing and matching connection between the conical base 5 and the glass bottle 13, as shown in Figure 5As shown, the outer periphery of the conical base 5 is provided with an annular sealing ring 18. In order to facilitate the operator to rotate the conical base 5 into the glass bottle 13 to realize the sealing installation, a ring 19 is arranged on one side of the large end surface of the conical base 5, and the water inlet pipe 6 is located in the ring 19. The outer periphery of the ring 19 is provided with circumferentially arranged friction protrusions 20.

[0022] Further, in order to enable the tested conduit to be kept in a vertical state on the partition plate 2 and ensure that the bubble water can discharge all the gas in the conduit from bottom to top, a plurality of conduit fixing devices are installed on the front side of the partition plate 2. Each conduit fixing device includes a long strip 21 and a locking strip 22. As shown in the figure, the end surface of the long strip 21 is provided with a magic tape hook surface 23, and the locking strip 22 is provided with a magic tape fluff surface 24 adhered to the magic tape hook surface 23. Each pipeline of the conduit is wrapped and fixed by the long strip 21, and the fixed connection of the long strip 21 is realized by the locking strip 22. The wrapping and fixing of the long strip 21 to the conduit pipeline ensures that the conduit is in a vertical state without causing deformation of the conduit itself. Figure 6

[0023] Further, in order to enable the single head of the conduit to be always located in the groove 3 at the top of the partition plate 2 during water injection, so that the water outlet end of the conduit and the pipe body of the conduit are respectively located on both sides of the partition plate 2, and to avoid the spilled water from falling on the pipe body to affect the subsequent observation of negative pressure, a conduit pressing device is installed on the rear side of the partition plate 2.

[0024] The conduit pressing device includes a rotatable circular plate 25, an extension link 26 is arranged on the circular plate 25, and a baffle cover 27 is installed at the end of the extension link 26. A torsion spring 28 is installed between the circular plate 25 and the partition plate 2. The torsion spring 28 always has a tendency to rotate the circular plate 25 to close the top of the groove 3 by the baffle cover 27, that is, always enables the single head of the conduit to be located in the groove 3 to avoid disengagement. If it is to be removed, the elastic force of the torsion spring 28 can be overcome to manually move the extension link 26, so that the baffle cover 27 moves out of the top of the groove 3, and the conduit can be removed in the groove 3. The pressing of the baffle cover 27 to the conduit in the groove 3 will not cause deformation of the conduit itself, so as to realize normal water injection and emptying of the internal air.

[0025] ​Further, in order to facilitate the installation of the water stop clamp 12 on the partition plate 2, a sliding groove frame 29 is arranged on the rear side of the partition plate 2 and matched with the water stop clamp 12, the sliding groove frame 29 is arranged obliquely towards the position of the groove 3, the bottom of the sliding groove frame 29 is closed, the upper part of the sliding groove frame 29 is open, a long slot 30 is arranged on the outer side of the sliding groove frame 29, and several water stop clamps 12 can be placed in the sliding groove frame 29, the water stop clamp 12 is in an open state when placed in the sliding groove frame 29, when needed, the operator can put fingers into the long slot 30 to push the water stop clamp 12 out of the sliding groove frame 29, and after being separated from the sliding groove frame 29, the water stop clamp 12 can be clamped and fixed on the single-end of the catheter.

[0026] The tester can further comprise a smart control system integrated with a processor, a memory and a user interface, which can automatically record and analyze test data, including but not limited to the pressure change curve inside the catheter, the negative pressure holding time, etc., and the user can check the test results through the user interface or preset test parameters to realize the automatic test process.

[0027] The universal design of the conical base 5 and the flexibility of the catheter fixing device make the tester applicable to test various specifications and types of hemodialysis catheters, thereby enhancing the universality and market competitiveness of the equipment, the catheter negative pressure tester provided by the utility model not only greatly improves the test efficiency and accuracy, but also enhances the operation convenience and safety, and has important significance for promoting the quality control and industry standardization of hemodialysis catheter products.

[0028] The technical scheme of the utility model is not limited to the scope of the embodiments described in the utility model. The technical content not described in the utility model is known technology.

Claims

1. A catheter negative pressure tester, characterized by: The utility model provides a kind of water bubble removal device, including platform plate (1), vertically arranged partition (2) is installed on platform plate (1), recess (3) is opened in the top of partition (2), and placing seat (4) is installed on the front side of platform plate (1) of partition (2), and removable conical base (5) is installed in placing seat (4), two groups of water inlet pipe (6) are equipped on the side of large end surface of conical base (5), and each water inlet pipe (6) is provided with switch valve (7), the side of small end surface of conical base (5) is equipped with two groups of water delivery pipe (8) being communicated with water inlet pipe (6), water delivery pipe (8) is communicated with the double-end one end of pipe, water delivery pipe (9) being communicated with water inlet pipe (6) is installed in placing seat (4), water treatment box (31) with top opening is installed on the rear side of platform plate (1) of partition (2), and water treatment box (31) is equipped with recovery water tank (32) and water supply tank (10), wherein recovery water tank (32) is located in the lower side position of recess (3), water pump (11) is arranged in water supply tank (10), the water outlet of water pump (11) is communicated with water delivery pipe (9), the position corresponding to recess (3) is also provided with water stop clamp (12) on the rear side of partition (2), water stop clamp (12) can be clamped in the single-end one end of pipe, after pipe is installed to conical base (5), water pump (11) starts to be able to fill the inside of pipe with bubble-removing water, negative pressure vacuum pump (14), pressure gauge (15), timer (16) and one end opening glass bottle (13) are also installed on platform plate (1), conical base (5) is communicated with the opening one end of glass bottle (13), pressure detection probe (17) is installed in glass bottle (13), pressure detection probe (17) is connected with pressure gauge (15) by control circuit, the air inlet of negative pressure vacuum pump (14) is communicated with the inner chamber of glass bottle (13) by pipeline, after pipe is filled with bubble-removing water and is closed at both ends, conical base (5) can drive pipe to be placed into glass bottle (13) and is closed, and negative pressure vacuum pump (14) starts to be able to exert negative pressure to pipe in glass bottle (13).

2. The conduit negative pressure tester of claim 1, wherein: The outer periphery of the conical base (5) is provided with an annular sealing ring (18), and the large end surface of the conical base (5) is provided with a ring (19). The water inlet pipe (6) is located in the ring (19). The outer periphery of the ring (19) is provided with circumferentially arranged friction protrusions (20).

3. The conduit negative pressure tester of claim 1, wherein: The front side of the partition (2) is provided with a plurality of pipe fixing devices. Each pipe fixing device comprises a long strip (21) and a locking strip (22). The end surface of the long strip (21) is provided with a magic tape hook surface (23). The locking strip (22) is provided with a magic tape velvet surface (24) adhered to the magic tape hook surface (23). Each pipeline of the pipe is wrapped and fixed by the long strip (21).

4. The conduit negative pressure tester of claim 1, wherein: The rear side of the partition plate (2) is provided with a catheter pressing device, which comprises a rotatable round plate (25), an extended connecting rod (26) provided on the round plate (25), a baffle cover (27) mounted on the end of the connecting rod (26), and a torsion spring (28) mounted between the round plate (25) and the partition plate (2), which always has a tendency to rotate the round plate (25) to close the top of the recess (3) by the baffle cover (27).

5. The conduit negative pressure tester of claim 1, wherein: The rear side of the partition plate (2) is provided with a sliding groove frame (29) matched with the water stop clamp (12), which is arranged obliquely towards the position of the recess (3), and the bottom of the sliding groove frame (29) is closed, the upper part of the sliding groove frame (29) is open, and a long slot (30) is formed on the outer side of the sliding groove frame (29).

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