An apparatus and method for testing the pressure resistance of a stapler

Abstract

The present application relates to a kind of for anastomat pressure resistance performance test instrument, cantilever frame is fixed on host computer, first height adjusting component is installed on host computer, water tank and first height adjusting component slip connection, horizontal adjusting component and cantilever frame are connected, second height adjusting component and horizontal adjusting component are connected, sample connector and second height adjusting component are connected;Cantilever frame slip connection has pressure sensor;Water tank and sample connector are connected by circulation pipe, water tank is connected by backwater pipe and pressure sensor, water tank is connected by test water pipe and pressure sensor;The highest water level line of water tank is connected with overflow pipe, pressure sensor and sample connector are connected by connecting pipe, connecting pipe is connected with drain pipe, overflow pipe, connecting pipe and drain pipe are all equipped with control valve.The present application also relates to a kind of for anastomat pressure resistance performance test method.The present application can accurately detect anastomat pressure resistance performance in real time, belongs to the technical field of anastomat performance test.

Description

An instrument and method for testing the pressure resistance of staplers. Technical Field

[0001] This invention relates to the field of anastomosis device performance testing technology, and specifically to an instrument and method for testing the pressure resistance performance of anastomosis devices. Background Technology

[0002] Anastomosing devices are medical consumables used to replace manual suturing. They are mainly used in digestive tract reconstruction and organ resection surgeries to suture the stumps or incisions of tissues and organs. Their working principle is similar to that of a stapler, using titanium or stainless steel staples to separate or anastomose tissues.

[0003] Depending on their application, staplers are mainly classified into skin staplers, digestive tract circular staplers, rectal staplers, circular hemorrhoid staplers, circumcision staplers, vascular staplers, hernia staplers, etc. Compared with traditional manual suturing, stapler suturing has the following advantages: (1) It is simple and convenient to operate, saving surgical time; (2) It is disposable, avoiding cross-infection; (3) It uses titanium or stainless steel staples to suture tightly and with moderate tightness; (4) It has few side effects and can effectively reduce surgical complications.

[0004] Anastomosis refers to the complete and unobstructed connection of incisions in tissues or organs. The pressure resistance of the anastomosis refers to the pressure that the anastomosis can withstand after the anastomosis device has completed the connection of the tissues or organs. The pressure resistance is a very important evaluation indicator for whether an anastomosis device can meet the requirements for use.

[0005] YY / T0245-2008 is a general industry standard for anastomotic devices, applicable to disposable and reusable anastomotic devices for circular incisions, hemorrhoidectomy, and stump closure. This standard specifies the following pressure resistance requirements for the anastomosis site: the anastomosis site after anastomosis should be able to withstand a pressure of not less than 3.6 kPa, and there should be no leakage or tearing.

[0006] Standard YY0875-2013 applies to disposable and reusable straight staplers used only for suturing, and is applied to suturing stumps in digestive tract reconstruction and organ resection surgeries. Standard YY0876-2013 applies to straight-type cutting staplers used for anastomosis, transection, and resection of tissues in digestive tract reconstruction and organ resection surgeries. Both standards specify the following requirements for the pressure resistance of the anastomosis: the anastomosis should be able to withstand a pressure of not less than 3.6 kPa, and leakage should not exceed 10 drops within 15 seconds.

[0007] As required, the test material is fresh pig intestine. According to the specific application requirements of the anastomosis device, the end of the fresh pig intestine or the joint of two sections of pig intestine is anastomosed (see Figure 1). The pressure resistance performance of the anastomosis site of the pig intestine is then tested.

[0008] Currently, there is no instrument capable of simultaneously testing the pressure resistance of both the distal anastomosis and the mating anastomosis. Therefore, it is essential to conduct research in the field of pressure resistance testing for the stapler industry and design a device that can simultaneously meet the requirements of both the distal and mating anastomosis.

[0009] The anastomosis is not absolutely sealed, and the number of water droplets needs to be observed over a certain period of time. Therefore, the pressure at the pressure-resistant port must be achieved through water pressure. In addition, the testing device must be able to meet the testing requirements of the end anastomosis and the butt anastomosis, and acquire and stabilize the anastomosis pressure data in real time. Summary of the Invention

[0010] In view of the technical problems existing in the prior art, the purpose of this invention is to provide an instrument and method for testing the pressure resistance performance of anastomotic devices, thereby solving the problem that existing anastomotic device pressure resistance performance tests cannot be used simultaneously to test the pressure resistance performance of the distal anastomosis and the butt anastomosis.

[0011] To achieve the above objectives, the present invention adopts the following technical solution:

[0012] An instrument for testing the pressure resistance of anastomotic devices includes a main unit, a cantilever frame, a water tank, a first height adjustment component, a second height adjustment component, a horizontal adjustment component, and a sample connector. The cantilever frame is fixed to the top of the main unit. The first height adjustment component is vertically mounted on the top of the main unit. The water tank and the first height adjustment component are slidably connected. The horizontal adjustment component and the cantilever frame are fixedly connected. The second height adjustment component and the slider of the horizontal adjustment component are fixedly connected. The sample connector and the slider of the second height adjustment component are fixedly connected. A pressure sensor is slidably connected to the cantilever frame, and the pressure sensor slides along the height direction of the cantilever frame. The water tank and the sample connector are connected through a circulation pipe. The top of the water tank is connected to the pressure sensor through a return water pipe, and the bottom of the water tank is connected to the pressure sensor through a test water pipe. The water tank has a maximum water level line, and an overflow pipe is connected to the maximum water level line. The pressure sensor and the sample connector are connected through a connecting pipe, which is connected to a drain pipe. The overflow pipe, the connecting pipe, and the drain pipe are all equipped with control valves.

[0013] As a preferred embodiment, the main unit is equipped with a detachable drainage trough located directly below the sample connector, with the outer ends of both the overflow pipe and the drain pipe extending above the drainage trough.

[0014] As a preferred embodiment, the first height adjustment component includes a water tank height adjustment track and a fixing component. The water tank is provided with a chute, and the chute and the water tank height adjustment track are slidably connected. The water tank is fixed to the water tank height adjustment track by the fixing component.

[0015] As a preferred embodiment, the leveling component includes a leveling rail, a leveling slider, and a leveling knob. The leveling rail is horizontally mounted on the cantilever frame, the leveling slider is slidably connected to the leveling rail, the leveling knob is rotatably connected to the leveling slider, and the leveling slider is fixed against the leveling rail by the leveling knob. The second height adjustment component is fixedly connected to the leveling slider.

[0016] As a preferred embodiment, the second height adjustment component includes a movable support rod, a height slider, and a height adjustment knob. One end of the movable support rod is fixed to the horizontal slider, and the other end of the movable support rod extends toward the drainage groove. The height slider and the movable support rod are slidably connected, and the height adjustment knob and the height slider are rotatably connected. The height slider is fixed by the height adjustment knob pressing against the height slider. The sample connector is fixedly connected to the height slider.

[0017] As a preferred embodiment, the number of sample connectors, circulation tubes, horizontal sliders, horizontal adjustment knobs, movable support rods, height adjustment knobs, and height sliders are all two. Both horizontal sliders are slidably connected to the horizontal guide rail. The two horizontal adjustment knobs are rotatably connected to the two horizontal sliders respectively. The two movable support rods are fixedly connected to the two horizontal sliders respectively. The two height sliders are slidably connected to the two movable support rods respectively. The two height adjustment knobs are rotatably connected to the two height sliders respectively. The two sample connectors are fixedly connected to the two height sliders respectively. Both circulation tubes are connected to the water tank. The two circulation tubes are connected to the two sample connectors respectively.

[0018] As a preferred embodiment, the pressure sensor is connected to the cantilever frame via a sensor fixing rod. One end of the fixing rod is fixedly connected to the top of the main unit, and the other end of the fixing rod is fixedly connected to the cantilever frame. The fixing rod is vertically positioned, and the pressure sensor is slidably connected to the fixing rod.

[0019] As a preferred embodiment, the main unit includes a machine base and a PLC control module. The PLC control module is installed inside the machine base, which is equipped with an operation screen. The operation screen and the PLC control module are electrically connected, as are the pressure sensor and the PLC control module. The top of the machine base is equipped with a placement slot, and the machine base is equipped with a drain outlet that connects to the placement slot. The drain slot and the placement slot are detachably installed.

[0020] A method for testing the pressure resistance of a stapler, employing an instrument for testing the pressure resistance of a stapler, includes the following steps:

[0021] S1: Open the control valves of the overflow pipe and the drain pipe, connect the water inlet pipe to the external water source to fill the water tank, the water in the water tank flows to each pipe, the air in each pipe is vented and the water level reaches the required position.

[0022] S2: Test the first test sample at the end anastomosis and the second test sample at the docking point respectively;

[0023] a1: The steps for testing the first test sample at the end anastomosis are as follows: connect the A1 end of the first test sample to the sample connector, move the pressure sensor to the same height as the B1 anastomosis of the first test sample, open the control valve of the connecting tube to inject water and pressurize the first test sample until the first test sample is full of water and then stop injecting water.

[0024] a2: Start timing via the operation screen and observe the leakage at the anastomosis of the first test sample B1;

[0025] b1: The steps for testing the second test sample with the mating joint are as follows: connect the two ends A2 of the second test sample to the two sample connectors respectively, move the pressure sensor to the same height as the B2 mating joint of the second test sample, open the control valve of the connecting tube to inject water and pressurize the second test sample until the second test sample is full of water and then stop injecting water.

[0026] b2: Start timing via the operation screen and observe the leakage at the anastomosis of the second test sample B2;

[0027] S3: Drain all water from the pipes and tanks. Test complete.

[0028] Principle: Test pressure is applied to the anastomosis port of the stapler by water pressure, and the water droplet situation can be clearly observed, which makes it easy to judge the pressure resistance performance of the anastomosis port of the stapler.

[0029] In summary, the present invention has the following advantages:

[0030] (1) High precision: the water pressure at the anastomosis port of the stapler can be accurately fed back to the host through the pressure sensor and can be displayed in real time on the operation screen.

[0031] (2) It has a timing function, which facilitates test operation and test observation.

[0032] (3) Easy to clean. Since the test material is fresh pig intestines, oil stains will adhere to the instrument during the test. The drainage tank and pipeline system of this invention are detachable, which makes it convenient to clean after the test.

[0033] (4) It has high adaptability and can be used for pressure resistance testing of almost all staplers.

[0034] (5) Easy to operate and easy to observe. The cantilever beam design makes the test operation more flexible and the test results easier to observe. Attached Figure Description

[0035] Figure 1 is a schematic diagram of the first and second test samples.

[0036] Figure 2 is a perspective view of an instrument used for testing the pressure resistance of anastomotic devices.

[0037] Figure 3 is a schematic diagram of the connection of all pipelines in this invention.

[0038] Figure 4 is a schematic diagram of the present invention.

[0039] Among them, 1-main unit, 2-drain outlet, 3.1-first control valve, 3.2-second control valve, 3.3-third control valve, 4-operation panel, 5-drain tank, 6-sensor fixing rod, 7-pressure sensor, 8-cantilever frame, 9-movable support rod, 10-sample connection connector, 11-height adjustment knob, 12-level adjustment knob, 13-water tank, 14-water tank height adjustment track, 15-overflow pipe, 16-circulation pipe, 17-water injection pipe, 18-test water pipe, 19-return water pipe, 20-sensor height adjustment knob, 21-drain pipe. Detailed Implementation

[0040] The present invention will now be described in further detail with reference to specific embodiments.

[0041] Example 1

[0042] As shown in Figure 2, this embodiment provides an instrument for testing the pressure resistance of an anastomosis device, which includes a main unit 1, a cantilever frame 8, a water tank 13, a first height adjustment component, a second height adjustment component, a horizontal adjustment component, and a sample connector.

[0043] The cantilever 8 is fixed to the top of the main unit 1. The first height adjustment component is vertically installed on the top of the main unit 1. The water tank 13 is slidably connected to the first height adjustment component. The horizontal adjustment component is fixedly connected to the cantilever 8. The second height adjustment component is fixedly connected to the slider of the horizontal adjustment component. The sample connector is fixedly connected to the slider of the second height adjustment component. The cantilever 8 is slidably connected to a pressure sensor 7, which slides along the height direction of the cantilever 8. The water tank 13 and the sample connector are connected through a circulation pipe 16. The top of the water tank 13 is connected to the pressure sensor 7 through a return water pipe 19. The bottom of the water tank 13 is connected to the pressure sensor 7 through a test water pipe 18. The water tank 13 has a maximum water level line. An overflow pipe 15 is connected to the maximum water level line of the water tank 13. The pressure sensor 7 and the sample connector are connected through a connecting pipe. The connecting pipe is connected to a drain pipe. The overflow pipe 15, the connecting pipe, and the drain pipe are all equipped with control valves. The control valve installed on the overflow pipe 15 is the first control valve 3.1, the control valve installed on the connecting pipe is the third control valve 3.3, and the control valve installed on the drain pipe is the second control valve 3.2.

[0044] The main unit 1 is equipped with a detachable drainage trough 5, which is located directly below the sample connector. The overflow pipe 15 and the outer end of the drain pipe both extend above the drainage trough 5.

[0045] The main unit 1 includes a machine base and a PLC control module. The PLC control module is installed inside the machine base. The machine base has an operation panel 4, which is electrically connected to the PLC control module. A pressure sensor 7 is also electrically connected to the PLC control module. A placement slot is located on the top of the machine base, and a drain outlet 2 is located on the machine base, connected to the placement slot. A drain trough 5 and the placement slot are detachably installed. The drain trough 5 is placed directly inside the placement slot, and handles are provided at both ends of the drain trough 5 for easy removal and placement. In this embodiment, in addition to using a timer, timing software started by the PLC control module can also be used for timing.

[0046] The pressure sensor 7 is connected to the cantilever frame 8 via a sensor fixing rod 6. The fixing rod and the cantilever frame 8 are fixedly connected, and the fixing rod is vertically set. The pressure sensor 7 and the fixing rod are slidably connected. The fixing rod 6 of the pressure sensor is fixed to the cantilever beam. The height of the pressure sensor can be controlled by moving the fixing rod 6 up and down. This height control is achieved through a knob on the pressure sensor, as shown in Figure 2, for adjusting the height of the pressure sensor.

[0047] The PLC control module can control the height of the water tank 13 to provide a specific pressure; the PLC control module can read the data from the pressure sensor 7 and display the pressure data in real time for easy testing and observation.

[0048] Water tank 13 delivers water pressure to the test sample and pressure sensor 7 through a water supply pipeline.

[0049] The pressure sensor 7 can be adjusted to different heights, allowing the height of the pressure sensor 7 to be adjusted at any time according to the size of the test sample, ensuring the accuracy of the pressure.

[0050] The first height adjustment component includes a water tank height adjustment track 14 and a fixing component. The water tank 13 is provided with a sliding groove, which is slidably connected to the water tank height adjustment track 14. The water tank 13 is fixed to the water tank height adjustment track 14 by the fixing component.

[0051] The horizontal adjustment component includes a horizontal guide rail, a horizontal slider, and a horizontal adjustment knob 12. The horizontal guide rail is horizontally mounted on the cantilever frame 8. The horizontal slider is slidably connected to the horizontal guide rail. The horizontal adjustment knob 12 is rotatably connected to the horizontal slider. The horizontal slider is fixed against the horizontal guide rail by the horizontal adjustment knob 12. The second height adjustment component is fixedly connected to the horizontal slider.

[0052] The second height adjustment component includes a movable support rod 9, a height slider, and a height adjustment knob 11. One end of the movable support rod 9 is fixed to the horizontal slider, and the other end of the movable support rod 9 extends toward the drainage groove 5. The height slider and the movable support rod 9 are slidably connected, and the height adjustment knob 11 and the height slider are rotatably connected. The height slider is fixed by the height adjustment knob 11 pressing against the height slider. The sample connector is fixedly connected to the height slider.

[0053] This allows the sample connection connector 10 to be adjusted vertically and horizontally according to testing requirements, enabling the delivery of water from the water tank 13 to the test sample, and accommodating sample connections at both the end anastomosis and the butt anastomosis ports. The specific testing process is as follows:

[0054] Basic principle: Under the same conditions, water columns of the same height will produce the same pressure.

[0055] In short, adjust the height of the water tank 13 so that the pressure value of the pressure sensor 7 is maintained at no less than 3.6 kPa. Adjust the height of the anastomosis port to match the height of the pressure sensor 7. At this time, the pressure on the anastomosis port should match the pressure displayed by the pressure sensor 7. Observe the condition of the anastomosis port. Under a pressure of no less than 3.6 kPa, there should be no leakage or tearing, or the leakage should not exceed 10 drops for 15 seconds.

[0056] See Figure 2 for details. The PLC control module implements control functions through the operation screen 4, and the height of the water tank 13 is adjusted through the operation screen 4. The cantilever frame 8 supports the pressure sensor 7 and the sample connection connector 10. The pressure sensor 7 has its height adjusted by the sensor mounting bracket on the cantilever frame 8. The sample connection connector 10 can be moved up and down on the movable support rod 9 by the height adjustment knob 11, and its left and right position on the cantilever frame 8 can be adjusted by the horizontal adjustment knob 12. The water tank is driven by a motor that drives a lead screw, which in turn drives the water tank to move up and down. The control screen controls the motor movement through the PLC control module, thereby driving the water tank to move up and down. Different water column heights will generate different water pressures, which in turn feeds the pressure data from the pressure sensor back to the PLC control module, thereby adjusting the water tank height based on the pressure data.

[0057] All pipeline connections in this application are detailed in Figure 3. The pipeline system consists of three control valves, an overflow pipe 15, a circulation pipe 16, an injection pipe 17, a test water pipe 18, and a return water pipe 19. By adjusting the corresponding control valves, the direction of water flow can be adjusted, and the air in the pipeline can be purged to avoid the influence of air on the pipeline pressure.

[0058] The other end of the water injection pipe 17 is connected to an external water source. Before the test begins, water is injected into the water tank 13 through the water injection pipe 17. The test water pipe 18 is connected to the pressure sensor 7. Part of the water exiting the pressure sensor 7 enters the return water pipe 19, and part of it enters the test sample through the sample connection connector 10. Excess water entering the sample connection connector 10 enters the circulation pipe 16. The overflow pipe 15 is used to stabilize the water level in the tank, thereby ensuring stable water pressure. The piping system forms two stable water paths: one is the test water pipe 18, pressure sensor 7, and return water pipe 19; the other is the test water pipe 18, pressure sensor 7, sample connection connector 10, test sample, and circulation pipe 16. The highest water level of all pipes in both water paths is the same, and the height of the test sample connector is kept at the same height as the pressure sensor 7, thus ensuring that the pressure of the pressure sensor 7 and the connector is consistent.

[0059] The three control valves have different functions. The first control valve 3.1 is connected to the overflow pipe 15 and its purpose is to ensure that the water in the tank reaches the required water level and stabilizes the water level. The second control valve 3.2 is located between the pressure sensor 7 and the sample and ensures that air is discharged from the drain pipe. The third control valve 3.3 is located at the sample connector and controls the water to enter the test sample and ensures that the air in the pipeline is purged before the sample is injected with water.

[0060] Specific operations to be carried out:

[0061] See Figures 2 and 3 for details. First, open the first control valve 3.1 and the third control valve 3.3, and close the second control valve 3.2 to purge the gas in the water pipe and bring the water level to the required position to prevent the gas from interfering with the pressure in the pipeline.

[0062] Water is injected into the water tank 13 through the water injection pipe 17. At the same time, the water in the water tank 13 enters the test water pipe 18, and then enters the return water pipe 19 and the sample connection connector 10 through the pressure sensor 7.

[0063] Once water is discharged from the first control valve 3.1, close the first control valve 3.1 and open the second control valve 3.2. Once water is discharged from the second control valve 3.2, immediately close the second control valve 3.2. Next, water will drain from the sample connection joint 10. At this point, close the third control valve 3.3. All air in the pipeline will be expelled, and the water level will stabilize at the required position.

[0064] At this point, fix part A1 of the test sample at the end of the anastomosis in Figure 1 to the 10-sample connection joint 10, and then move the pressure sensor 7 to the same height as the anastomosis of the sample B1 to be tested. Open the third control valve 3.3 to inject water and pressurize the sample through the sample connection joint 10. After the sample is full of water, stop the water injection. At this time, the pressure on the B1 anastomosis is the pressure displayed by the pressure sensor 7. Click the start test button on the screen to start the timing function and observe the leakage at the anastomosis port to determine the pressure resistance performance of the anastomosis.

[0065] After the test is completed, remove the sample, open the first control valve 3.1 and the second control valve 3.2, drain the water from the pipeline and water tank 13, and the test is over.

[0066] Example 2

[0067] In this embodiment, there are two sample connectors, two circulation tubes 16, two horizontal sliders, two horizontal adjustment knobs 12, two movable support rods 9, two height adjustment knobs 11, and two height sliders. Both horizontal sliders are slidably connected to the horizontal guide rail. The two horizontal adjustment knobs 12 are rotatably connected to the two horizontal sliders respectively. The two movable support rods 9 are fixedly connected to the two horizontal sliders respectively. The two height sliders are slidably connected to the two movable support rods 9 respectively. The two height adjustment knobs 11 are rotatably connected to the two height sliders respectively. The two sample connectors are fixedly connected to the two height sliders respectively. Both circulation tubes 16 are connected to the water tank 13. The two circulation tubes 16 are connected to the two sample connectors respectively.

[0068] Test steps:

[0069] Open the control valves of the overflow pipe 15 and the drain pipe, connect the water inlet pipe 17 to the external water source and fill the water tank 13 with water. The water in the water tank 13 flows to each pipe, venting the air in each pipe and making the water level reach the required position.

[0070] For the anastomotic sample, fix the two A2 points to the two sample connection joints 10 respectively, and then move the pressure sensor 7 to the same height as the anastomosis port of the sample B2 to be tested. Open the third control valve 3.3 to inject water and pressurize the sample through the sample connection joint 10. After the sample is full of water, stop the water injection. At this time, the pressure on the B1 anastomosis port is the pressure displayed by the pressure sensor 7. Click the start test button on the screen to start the timing function and observe the leakage at the anastomosis port to determine the pressure resistance performance of the anastomosis device.

[0071] The parts not mentioned in this embodiment are the same as in Embodiment 1.

[0072] The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present invention shall be considered equivalent substitutions and shall be included within the protection scope of the present invention.

Claims

1. An instrument for testing the pressure resistance performance of anastomotic devices, characterized in that: The system includes a main unit, a cantilever frame, a water tank, a first height adjustment component, a second height adjustment component, a horizontal adjustment component, and a sample connector. The cantilever frame is fixed to the top of the main unit. The first height adjustment component is vertically mounted on the top of the main unit. The water tank and the first height adjustment component are slidably connected. The horizontal adjustment component and the cantilever frame are fixedly connected. The second height adjustment component and the slider of the horizontal adjustment component are fixedly connected. The sample connector and the slider of the second height adjustment component are fixedly connected. A pressure sensor is slidably connected to the cantilever frame, and the pressure sensor slides along the height direction of the cantilever frame. The water tank and the sample connector are connected via a circulation pipe. The top of the water tank is open to... The water tank is connected to the pressure sensor via a return water pipe, and the bottom of the water tank is connected to the pressure sensor via a test water pipe. The water tank has a maximum water level line, and an overflow pipe is connected to the maximum water level line. The pressure sensor and sample connector are connected via a connecting pipe, which is connected to a drain pipe. All three pipes—the overflow pipe, the connecting pipe, and the drain pipe—are equipped with control valves. The main unit is equipped with a detachable drain tank located directly below the sample connector. The outer ends of both the overflow pipe and the drain pipe extend above the drain tank. The leveling components include a level guide rail, a level slider, and a leveling knob. The level guide rail is horizontally mounted on the cantilever frame, and the level slider and water... A horizontal guide rail is slidably connected, and a horizontal adjustment knob and a horizontal slider are rotatably connected. The horizontal slider is fixed to the horizontal guide rail by the horizontal adjustment knob. A second height adjustment component is fixedly connected to the horizontal slider. The second height adjustment component includes a movable support rod, a height slider, and a height adjustment knob. One end of the movable support rod is fixed to the horizontal slider, and the other end extends towards the drainage groove. The height slider and the movable support rod are slidably connected, and the height adjustment knob and the height slider are rotatably connected. The height slider is fixed to the height slider by the height adjustment knob. A sample connector is fixedly connected to the height slider. The device consists of two heads, two circulation tubes, two horizontal sliders, two horizontal adjustment knobs, two movable support rods, two height adjustment knobs, and two height sliders. Both horizontal sliders are slidably connected to the horizontal guide rail. The two horizontal adjustment knobs are rotatably connected to the two horizontal sliders respectively. The two movable support rods are fixedly connected to the two horizontal sliders respectively. The two height sliders are slidably connected to the two movable support rods respectively. The two height adjustment knobs are rotatably connected to the two height sliders respectively. The two sample connectors are fixedly connected to the two height sliders respectively. Both circulation tubes are connected to the water tank. The two circulation tubes are connected to the two sample connectors respectively.

2. An instrument for testing the pressure resistance of an anastomosis device according to claim 1, characterized in that: The first height adjustment component includes a water tank height adjustment track and a fixing component. The water tank is provided with a slide groove, which is slidably connected to the water tank height adjustment track. The water tank is fixed by the fixing component and the water tank height adjustment track.

3. An instrument for testing the pressure resistance of an anastomosis device according to claim 1, characterized in that: The pressure sensor is connected to the cantilever frame via a sensor fixing rod. One end of the fixing rod is fixedly connected to the top of the main unit, and the other end of the fixing rod is fixedly connected to the cantilever frame. The fixing rod is set vertically, and the pressure sensor and the fixing rod are slidably connected.

4. An instrument for testing the pressure resistance of an anastomosis device according to claim 1, characterized in that: The main unit includes a machine base and a PLC control module. The PLC control module is installed inside the machine base. The machine base has an operation panel, which is electrically connected to the PLC control module. The pressure sensor is also electrically connected to the PLC control module. The top of the machine base has a placement slot, and the machine base has a drain outlet connected to the placement slot. The drain slot and the placement slot are detachable.

5. A method for testing the pressure resistance performance of a stapler, characterized in that, The instrument and method for testing the pressure resistance of anastomotic devices according to any one of claims 1-4 are used. Includes the following steps: S1: Open the control valves of the overflow pipe and the drain pipe, connect the water inlet pipe to the external water source to fill the water tank, the water in the tank flows to each pipe, the air in each pipe is emptied and the water level reaches the required position; S2: Test the first test sample at the end joint and the second test sample at the joint joint respectively. a1: The steps for testing the first test sample at the end anastomosis are as follows: connect the A1 end of the first test sample to the sample connector, move the pressure sensor to the same height as the B1 anastomosis of the first test sample, open the control valve of the connecting tube to inject water and pressurize the first test sample until the first test sample is full of water and then stop injecting water. a2: Start timing via the operation screen and observe the leakage at the anastomosis of the first test sample B1; b1: The steps for testing the second test sample with the mating joint are as follows: connect the two ends A2 of the second test sample to the two sample connectors respectively, move the pressure sensor to the same height as the B2 mating joint of the second test sample, open the control valve of the connecting tube to inject water and pressurize the second test sample until the second test sample is full of water and then stop injecting water. b2: Start timing via the operation screen and observe the leakage at the anastomosis of the second test sample B2; S3: Drain all water from the pipes and water tanks, and the test is complete.

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