Dialysis catheter testing device

Abstract

The utility model relates to a kind of dialysis catheter testing device, including test table, simulation blood circulation mechanism and detection mechanism, the upper portion of test table is fixedly installed with catheter fixing frame, the inside of catheter fixing frame is fixedly clamped with dialysis catheter main body, dialysis catheter main body's two inlet end is provided with shunt nozzle, simulation blood circulation mechanism includes liquid storage tank, peristaltic pump, connecting pipe one, connecting pipe two and connecting pipe three.This dialysis catheter testing device, by setting simulation blood circulation mechanism, the circulation flow of human blood in dialysis catheter can be simulated, whether the condition that blood clot, thrombus blockage exists in dialysis catheter can be accurately detected by pressure sensor, flow sensor and ultrasonic detector, the reflux interference situation of dialysis catheter can be effectively detected by pressure valve and flow switch in reflux detection device, the precision and comprehensiveness of detection are improved, reliable means is provided for the quality detection of dialysis catheter.

Description

Technical Field

[0001] This utility model relates to the field of medical device testing technology, specifically a dialysis catheter testing device. Background Technology

[0002] Hemodialysis is one of the main methods for treating end-stage renal disease. As an important access route for hemodialysis, the patency of the dialysis catheter directly affects the dialysis effect and the patient's life safety. During dialysis, problems such as coagulation, thrombosis, and backflow interference may occur in the catheter. These problems can lead to a decline in catheter function and even cause serious complications. Therefore, it is crucial to conduct relevant tests on the dialysis catheter to ensure its good performance.

[0003] Currently, existing dialysis catheter testing devices have some shortcomings. For example, the detection of coagulation and thrombosis in catheters mostly relies on manual observation or simple pressure testing, which has low detection accuracy and is prone to missed detection. Furthermore, there is a lack of effective simulation and detection methods for testing backflow interference, making it impossible to accurately assess the catheter's anti-backflow capability in actual use. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a dialysis catheter testing device with high detection accuracy, solving the problems of low detection accuracy and insufficient testing methods for backflow interference in existing testing devices.

[0005] To achieve the aforementioned high detection accuracy, this utility model provides the following technical solution: a dialysis catheter testing device, comprising a test platform, a simulated blood circulation mechanism, and a detection mechanism. A catheter fixing frame is fixedly installed above the test platform, and the dialysis catheter body is fixedly held inside the catheter fixing frame. Diverter nozzles are provided at the two inlet ends of the dialysis catheter body.

[0006] The simulated blood circulation mechanism includes a reservoir, a peristaltic pump, a first connecting tube, a second connecting tube, and a third connecting tube. The reservoir is fixedly installed above the test platform and to the left of the catheter holder. The peristaltic pump is fixedly installed above the test platform and to the right of the catheter holder. The outlet end of the reservoir is sealed to the inlet end of the peristaltic pump through the first connecting tube. The outlet end of the peristaltic pump is sealed to the confluence end of the shunt nozzle through the second connecting tube. The outlet end of the dialysis catheter body is sealed to the inlet end of the reservoir through the third connecting tube.

[0007] Furthermore, the detection mechanism includes a pressure sensor, a flow sensor, an ultrasonic detector, and a reflux detection device. A pressure sensor is installed on the second connecting pipe, a flow sensor is installed on the third connecting pipe, and an ultrasonic detector is installed on the left side wall of the conduit fixing bracket.

[0008] Furthermore, the backflow detection device includes a pressure valve and a flow switch. A pressure valve is installed on the third connecting pipe and above the flow sensor, and a flow switch is installed on the second connecting pipe and to the left of the pressure sensor.

[0009] Furthermore, the pressure valve is an electric pressure valve.

[0010] Furthermore, a base is fixedly connected to the bottom of the test bench, and a control panel is provided above the base and located on the front side of the test bench.

[0011] Furthermore, the conduit fixing frame includes two symmetrically arranged clamps. The lower clamp is fixedly connected to the test platform, and the upper clamp is movably connected to the lower clamp by bolts. Anti-slip pads are provided on the inner sides of both clamps.

[0012] Furthermore, the diversion nozzle has a three-way structure, with its confluence end connected to the connecting tube 2, and its diversion end connected to the two inlets of the dialysis catheter body respectively.

[0013] Furthermore, the high-frequency probe of the ultrasound detector is closely attached to the left side wall of the catheter fixation frame and scans the side wall of the dialysis catheter body in real time.

[0014] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0015] 1. This dialysis catheter testing device, by setting up a simulated blood circulation mechanism, can simulate the circulation and flow of human blood within the dialysis catheter. Through pressure sensors, flow sensors, and ultrasonic detectors, it can accurately detect whether there is coagulation or thrombus blockage within the dialysis catheter. Through the pressure valve and flow switch in the reflux detection device, it can effectively detect reflux interference in the dialysis catheter, improving the accuracy and comprehensiveness of the detection, and providing a reliable means for the quality inspection of dialysis catheters. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a front sectional view of the structure of this utility model;

[0018] Figure 3 This is a partial cross-sectional view of the structure of this utility model;

[0019] Figure 4 For practical purposes Figure 2 Enlarged view of point A in the middle.

[0020] In the diagram: 1. Test stand; 2. Catheter holder; 3. Dialysis catheter body; 4. Storage tank; 5. Peristaltic pump; 6. Connecting tube one; 7. Connecting tube two; 8. Connecting tube three; 9. Pressure sensor; 10. Flow sensor; 11. Ultrasonic detector; 12. Pressure valve; 13. Flow switch; 14. Diverter nozzle; 15. Base; 16. Control panel. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-4 This embodiment of a dialysis catheter testing device includes a test platform 1, a simulated blood circulation mechanism, and a detection mechanism. A catheter fixing frame 2 is fixedly installed on the top of the test platform 1. The catheter fixing frame 2 internally holds the dialysis catheter body 3. Two diversion nozzles 14 are provided at the two inlet ends of the dialysis catheter body 3. The diversion nozzles 14 are three-way structures. The confluence end is connected to the connecting pipe 7, while the diversion end is connected to the two inlets of the dialysis catheter body 3 respectively, which is used to divide the fluid output by the peristaltic pump 5 into two paths to enter the inlet end of the dialysis catheter.

[0023] The simulated blood circulation mechanism includes a reservoir 4, a peristaltic pump 5, a connecting pipe 6, a connecting pipe 7, and a connecting pipe 8. The reservoir 4 is fixedly installed above the test platform 1 and to the left of the catheter holder 2. The reservoir 4 contains simulated blood, which is physiological saline containing an anticoagulant, to better simulate the characteristics of human blood. The peristaltic pump 5 is fixedly installed above the test platform 1 and to the right of the catheter holder 2. The outlet end of the reservoir 4 is sealed to the inlet end of the peristaltic pump 5 via the connecting pipe 6. The outlet end of the peristaltic pump 5 merges with the flow divider 14. The ends are sealed together by connecting pipe 2 7, where the confluence end is the fluid confluence point of the diverter 14. The outlet end of the dialysis catheter body 3 and the inlet end of the reservoir 4 are sealed together by connecting pipe 3 8. Then, the simulated blood in the reservoir 3 can flow into the peristaltic pump 5 through connecting pipe 1 6. Then, the simulated blood in the peristaltic pump 5 can enter the dialysis catheter body 3 through connecting pipe 2 7. Finally, the simulated blood in the dialysis catheter body 3 can flow back into the reservoir 4 through connecting pipe 3 8, forming a closed loop. This design can simulate the circulation of human blood in the dialysis catheter.

[0024] In the case implementation, the detection mechanism includes a pressure sensor 9, a flow sensor 10, an ultrasonic detector 11, and a reflux detection device. The pressure sensor 9 is installed on the second connecting pipe 7 to detect the pressure at the inlet of the dialysis catheter. The flow sensor 10 is installed on the third connecting pipe 8 to detect the flow at the outlet of the dialysis catheter. The ultrasonic detector 11 is installed on the left side wall of the catheter holder 2. The ultrasonic detector 10 uses a high-frequency ultrasonic probe, which can clearly display the coagulation and thrombus conditions in the dialysis catheter. The high-frequency probe of the ultrasonic detector 11 is close to the left side wall of the catheter holder 2 and scans in real time toward the side wall of the dialysis catheter body 3 to detect the presence of coagulation clots or thrombi through ultrasonic images.

[0025] In the case implementation, the reflux detection device includes a pressure valve 12 and a flow switch 13. The pressure valve 12 is installed on the connecting tube 3 7 above the flow sensor 10. The pressure valve 12 is an electric pressure valve. This design can accurately adjust the pressure in the connecting tube 3 7 through program calculation on the control panel 16 to simulate different physiological pressure environments. The flow switch 13 is installed on the connecting tube 2 7 to the left of the pressure sensor 9. During reflux detection, the pressure valve 12 is adjusted through the control panel 16 to increase the resistance of the connecting tube 3 8, simulating the scenario of increased venous pressure in the human body. If there is reflux in the dialysis catheter, the flow rate of the connecting tube 2 7 will fluctuate abnormally. The flow switch 13 can monitor and feed back to the control panel 16 in real time to determine the degree of reflux interference.

[0026] In the implementation of the case, a base 15 is fixedly connected to the bottom of the test bench 1. A control panel 16 is set above the base 15 and located in front of the test bench 1. The control panel 16 is electrically connected to all components in the case through wires. The control panel 16 integrates a microprocessor to receive real-time data from the pressure sensor 9 and the flow sensor 10, control the flow rate of the peristaltic pump 5 and the opening degree of the pressure valve 12, analyze the image of the ultrasonic detector 11, and determine whether there are abnormalities such as coagulation or reflux in the catheter through a preset algorithm, and display the test results in digital or image form.

[0027] In the case implementation, the catheter holder 2 includes two symmetrically arranged clamps. The lower clamp is fixedly connected to the test table 1, and the upper clamp is movably connected to the lower clamp by bolts. The inner sides of both clamps are provided with anti-slip pads, which can accommodate dialysis catheters of different specifications and are used to fix the dialysis catheters to be tested.

[0028] When implementing this procedure, please follow these steps:

[0029] 1) Firstly, by setting up a liquid storage tank 4, a peristaltic pump 5, a connecting pipe 1 6, a connecting pipe 2 7, and a connecting pipe 3 8, the circulation of human blood in the dialysis catheter can be simulated.

[0030] 2) Then, the pressure sensor 9, flow sensor 10 and ultrasonic detector 11 can accurately detect whether there is coagulation or thrombus blockage in the dialysis catheter;

[0031] 3) Finally, the pressure valve 12 and flow switch 13 in the reflux detection device can effectively detect the reflux interference of the dialysis catheter, improving the accuracy and comprehensiveness of the detection and providing a reliable means for the quality inspection of the dialysis catheter.

[0032] In summary, this dialysis catheter testing device, by incorporating a reservoir 4, a peristaltic pump 5, connecting pipe one 6, connecting pipe two 7, and connecting pipe three 8, can simulate the circulation of human blood within a dialysis catheter. The pressure sensor 9, flow sensor 10, and ultrasonic detector 11 can accurately detect the presence of coagulation or thrombus blockage within the dialysis catheter. The pressure valve 12 and flow switch 13 in the reflux detection device can effectively detect reflux interference in the dialysis catheter, improving the accuracy and comprehensiveness of the detection. This provides a reliable means for the quality inspection of dialysis catheters and solves the problems of existing testing devices, which mostly rely on manual observation or simple pressure testing, resulting in low detection accuracy and a tendency to miss detections. Furthermore, the lack of effective simulation and detection methods for reflux interference testing makes it impossible to accurately assess the catheter's resistance to reflux in actual use.

[0033] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dialysis catheter testing device, comprising a testing platform (1), a simulated blood circulation mechanism, and a detection mechanism, characterized in that: A catheter holder (2) is fixedly installed above the test stand (1). The catheter holder (2) holds the dialysis catheter body (3) inside. A shunt nozzle (14) is provided at the two inlet ends of the dialysis catheter body (3). The simulated blood circulation mechanism includes a reservoir (4), a peristaltic pump (5), a first connecting pipe (6), a second connecting pipe (7), and a third connecting pipe (8). The reservoir (4) is fixedly installed above the test platform (1) and to the left of the catheter holder (2). The peristaltic pump (5) is fixedly installed above the test platform (1) and to the right of the catheter holder (2). The outlet end of the reservoir (4) is sealed to the inlet end of the peristaltic pump (5) through the first connecting pipe (6). The outlet end of the peristaltic pump (5) is sealed to the confluence end of the diverter (14) through the second connecting pipe (7). The outlet end of the dialysis catheter body (3) is sealed to the inlet end of the reservoir (4) through the third connecting pipe (8).

2. The dialysis catheter testing device according to claim 1, characterized in that: The detection mechanism includes a pressure sensor (9), a flow sensor (10), an ultrasonic detector (11), and a backflow detection device. The pressure sensor (9) is installed on the second connecting pipe (7), the flow sensor (10) is installed on the third connecting pipe (8), and the ultrasonic detector (11) is installed on the left side wall of the conduit fixing bracket (2).

3. The dialysis catheter testing device according to claim 2, characterized in that: The backflow detection device includes a pressure valve (12) and a flow switch (13). The pressure valve (12) is provided on the third connecting pipe (8) above the flow sensor (10), and the flow switch (13) is provided on the second connecting pipe (7) to the left of the pressure sensor (9).

4. The dialysis catheter testing device according to claim 3, characterized in that: The pressure valve (12) is an electric pressure valve.

5. The dialysis catheter testing device according to claim 1, characterized in that: The bottom of the test bench (1) is fixedly connected to a base platform (15), and a control panel (16) is provided above the base platform (15) and located on the front side of the test bench (1).

6. The dialysis catheter testing device according to claim 1, characterized in that: The conduit fixing frame (2) includes two symmetrically arranged clamps. The lower clamp is fixedly connected to the test table (1), and the upper clamp is movably connected to the lower clamp by bolts. Anti-slip pads are provided on the inner side of both clamps.

7. A dialysis catheter testing device according to claim 2, characterized in that: The diversion nozzle (14) has a three-way structure, with its confluence end connected to the connecting pipe two (7), and its diversion end connected to the two inlets of the dialysis catheter body (3).

8. A dialysis catheter testing device according to claim 2, characterized in that: The high-frequency probe of the ultrasound detector (11) is close to the left side wall of the catheter fixation frame (2) and scans the side wall of the dialysis catheter body (3) in real time.

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