Anastomat suture port pressure resistance performance testing device

Abstract

This utility model relates to the field of medical device testing technology, specifically a device for testing the pressure resistance of a stapler suture joint. The device includes a test tube, one end of which is connected to an intestinal tube simulating the intestine for testing. One end of the intestinal tube has a suture joint formed by the stapler. An electric flow valve is connected to one end of the test tube. A fixing tube and an adjusting screw are fitted onto the test tube. The fixing tube is fixedly connected to the test tube. This utility model works by manually rotating the adjusting screw after the open end of the intestinal tube is fitted onto the test tube. This causes the adjusting screw to push a compression ring, using the inclined surface of the inner ring of the compression ring to press against the inclined surface of the rubber compression ring, thus tightening the rubber compression ring and compressing the intestinal tube fitted onto the test tube. The use of a threaded connection for driving pressure application allows for stronger pressure and prevents leakage or detachment at the connection between the test tube and the intestinal tube during testing.

Description

Technical Field

[0001] This utility model relates to the field of medical device testing technology, specifically a device for testing the pressure resistance of an anastomosis suture. Background Technology

[0002] For some intestinal lesions, after surgery to remove the lesion from the intestine, it is necessary to use a stapler to suture the intestinal tract and other tissues.

[0003] To ensure surgical safety, it is necessary to test the pressure resistance of the suture formed by the stapler. In the existing technology, the method for testing the pressure resistance of the suture formed by the stapler is to simulate the intestinal tube with pig intestine, suture one end of the intestinal tube with the stapler, inject water and pressurize the other end, and observe whether there is any leakage at the suture to complete the test of the pressure resistance of the stapler suture.

[0004] However, the existing device for testing the pressure resistance of the anastomosis suture involves attaching one end of the intestinal tube to the water injection pipe and then securing the intestinal tube to the water injection pipe by wrapping and knotting a rope around its outside. This method of securing the intestinal tube is not only complicated to operate and has low testing efficiency, but it is also prone to detachment or leakage at the connection between the intestinal tube and the water injection pipe due to insufficient force applied during the pressurization process. Utility Model Content

[0005] The purpose of this invention is to provide a device for testing the pressure resistance of an anastomosis suture, so as to solve the problems mentioned in the background art.

[0006] The objective of this utility model can be achieved through the following technical solutions: A device for testing the pressure resistance of a stapler suture joint includes a test pipe, one end of which is connected to an intestinal tube for testing to simulate the intestine. One end of the intestinal tube is provided with a suture joint formed by a stapler. One end of the test pipe is connected to an electric flow valve. The test pipe is fitted with a fixed pipe and an adjusting screw pipe. The fixed pipe is fixedly connected to the test pipe, and the fixed pipe and the adjusting screw pipe are threaded together. A compression ring is rotatably connected to the end of the adjusting screw pipe near the intestinal tube. The inner surface of the compression ring is an inclined surface. The test pipe is also fitted with a limiting ring and a rubber compression ring located in front of the compression ring. The outer surface of the rubber compression ring is an inclined surface that matches the inclined surface of the inner surface of the compression ring.

[0007] Preferably, the fixed pipe is fixedly connected to the test pipe via a fixed connecting rod.

[0008] Preferably, the outer surface of the fixed tube is provided with a positioning mechanism to limit the maximum movement distance of the limiting ring.

[0009] The positioning mechanism includes a protruding plate fixedly connected to the outer surface of the fixed tube. A movable connecting rod is slidably connected to the protruding plate. One end of the movable connecting rod is fixedly connected to a limiting ring, and the other end is fixedly connected to a limiting ring. The limiting ring abuts against the protruding plate.

[0010] Preferably, the anastomosis suture pressure resistance testing device further includes a compression component for closing excess openings in the intestinal tract. The compression component includes a fixed frame with a control screw threaded onto the fixed frame, and a compression plate rotatably connected to the bottom end of the control screw.

[0011] Preferably, a guide shaft is fixedly connected inside the fixed frame, and the guide shaft passes through the pressure plate and is slidably connected to the pressure plate.

[0012] Preferably, the inlet of the electric flow valve is used to connect to an external pressurized water pump.

[0013] The beneficial effects of this utility model are: This invention involves placing the open end of the intestinal tube onto the test pipe, then manually rotating the adjusting screw tube. This causes the adjusting screw tube to push the compression ring, and the inclined surface of the inner ring of the compression ring presses against the inclined surface of the rubber compression ring, causing the rubber compression ring to tighten. This compresses and tightens the intestinal tube placed on the test pipe. The use of a threaded connection for driving and pressurizing allows for the application of stronger pressure, preventing leakage or detachment at the connection between the test pipe and the intestinal tube during the test. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this utility model; Figure 2 yes Figure 1 Schematic diagram of the connection between midgut tube 1 and the test tube; Figure 3 yes Figure 2 Rear view of the test tube; Figure 4 yes Figure 2 Cross-sectional view of the test tube section; Figure 5 This is a schematic diagram of the overall structure of Embodiment 2 of this utility model; Figure 6 yes Figure 5 A schematic diagram of the structure of the fixed frame section from the side.

[0015] The attached figures are labeled as follows: 1. Intestinal tube; 101. Suture opening; 2. Test pipe; 201. Hydraulic sensor; 202. Water outlet pipe; 3. Electric flow valve; 4. Fixed pipe; 401. Fixed connecting rod; 5. Adjusting screw; 6. Compression ring; 7. Limiting ring; 8. Rubber compression ring; 9. Protruding plate; 10. Movable connecting rod; 11. Limiting ring; 12. Fixed frame; 13. Control screw; 14. Compression plate; 15. Guide shaft. Detailed Implementation

[0016] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0017] Example 1: like Figure 1-4 A device for testing the pressure resistance of a stapler suture opening includes a test pipe 2. One end of the test pipe 2 is connected to an intestinal tube 1 for simulating the intestine for testing. Before the test, a stapler is used to suture one end of the intestinal tube 1, and a suture opening 101 is formed at one end of the intestinal tube 1. Except for the suture opening, the other ends of the intestinal tube 1 are not sutured.

[0018] The procedure for treating intestinal segment 1 is as follows: Intestinal segment 1 is a fresh pig intestine, with an in vitro time of less than 24 hours. It should be stored in the range of 5-15 degrees Celsius without ice crystal formation. Before the experiment, the intestinal cavity should be cleaned, and the intestinal fat pouches and mesentery at the anastomosis (suturing) site should be removed. Keep the serosa of intestinal segment 1 facing outward. Select one intestinal segment 1, open the anastomosis device, fire the anastomosis device at one end of intestinal segment 1, and suture one end of intestinal segment 1.

[0019] One end of the test pipe 2 is fixedly connected to an electric flow valve 3. The electric flow valve 3 is existing technology, externally powered, and has an external control switch that can adjust the water flow rate. When the water pressure in the intestinal tube 1 is about to reach 3.6 kPa, the water flow rate can be reduced to better control the hydraulic pressure. When the water pressure reaches 3.6 kPa, the electric flow valve 3 is completely closed to stop the water injection. The inlet of the electric flow valve 3 is connected to an external pressurized water pump. Before the test, the open end of the intestinal tube 1 is opened and fitted onto the other end of the test pipe. Using the test pipe 2, water can be injected and pressurized into the intestinal tube 1. A hydraulic sensor 201 and a water outlet pipe 202 with a solenoid valve are installed on the test pipe 2. The hydraulic sensor 201 is used to detect the hydraulic pressure inside the test pipe 2. After the test is completed, the solenoid valve on the water outlet 202 can be opened to drain the water from the test pipe 2 and the intestinal tube 1. The test pipe 2 is fitted with a fixed pipe 4 and an adjusting screw pipe 5. The fixed pipe 4 has an internal thread, and the adjusting screw pipe 5 has an external thread. The internal thread of the fixed pipe 4 and the external thread of the adjusting screw pipe 5 are threaded together. The end of the adjusting screw pipe 5 near the intestinal tube 1 is rotatably connected to a compression ring 6. The inner surface of the compression ring 6 is inclined. The test pipe 2 is fitted with a limiting ring 7 and a rubber compression ring 8. Both the limiting ring 7 and the rubber compression ring 8 are located at the end of the compression ring 6 away from the adjusting screw tube 5. The outer surface of the rubber compression ring 8 is inclined and matches the inclined surface of the inner surface of the compression ring 6, so that when the compression ring 6 compresses the rubber compression ring 8, the rubber compression ring 8 can be contracted inward.

[0020] A fixing rod 401 is fixedly connected to one side of the fixing tube 4. One end of the fixing rod 401 is fixedly connected to the test pipe 2 to position the fixing tube 4 so that the fixing tube 4 will not move on the test pipe 2.

[0021] A positioning mechanism is provided on the outer surface of the fixed tube 4. The positioning mechanism includes a protruding plate 9 fixed to the outer surface of the fixed tube 4. A movable connecting rod 10 is slidably connected to the protruding plate 9. A limiting ring 11 is fixedly connected to one end of the movable connecting rod 10, and a limiting ring 7 is fixedly connected to the other end. When the limiting ring 7 moves away from the fixed tube 4, it will eventually cause the limiting ring 11 to abut against the protruding plate 9, thereby limiting the maximum movement distance between the movable connecting rod 10 and the limiting ring 7.

[0022] The working principle of the anastomosis suture joint pressure resistance testing device provided by this utility model is as follows: In Example 1, the intestinal segment 1 being tested is an intestinal segment 1 with only two openings. When it is necessary to perform a pressure resistance test on the suture opening 101 of the intestinal segment 1: First, select a qualified fresh pig intestine as the intestinal tube 1 sample, clean it, and use a stapler to suture one end of the intestinal tube 1 to form the suture 101 to be tested. Next, open the open end of the intestinal tube 1 and place it on the end of the test tube 2. Then, move the limiting ring 7 and the compression ring 6 to the surface of the connection between the intestinal tube 1 and the test tube 2. Rotate the adjusting screw tube 5, and the adjusting screw tube 5 will be pushed forward through the threaded transmission. The adjusting screw tube 5 will push the compression ring 6 forward. Since the inner surface of the compression ring 6 is inclined, it will cooperate with the inclined outer surface of the rubber compression ring 8, so that the rubber compression ring 8 will be radially compressed and contracted inward, thereby tightly pressing the opening end of the intestinal tube 1 to achieve reliable sealing and fixation. Then connect the inlet of the electric flow valve 3 to an external pressurized water pump, turn on the water pump to inject water and pressurize the test pipe 2 and the intestinal tube 1. The water pressure gradually increases and acts on the suture 101. The water is pressurized to 3.6 kPa and held for 15 seconds. The pressure resistance is evaluated by observing the leakage at the suture 101 or measuring the rupture pressure. After the test is completed, open the solenoid valve of the water outlet pipe 202 to drain the water in the system, rotate the adjusting screw tube 5 in the opposite direction to make the compression ring 6 retract and the rubber compression ring 8 return to its original state, and then the intestinal tube 1 sample that has been tested can be removed.

[0023] Compared with related technologies, the pressure resistance testing device for stapler sutures provided by this utility model has the following advantages: This invention involves placing the open end of the intestinal tube 1 onto the test pipe 2, then manually rotating the adjusting screw tube 5. This causes the adjusting screw tube 5 to push the compression ring 6, which in turn presses the inclined surface of the rubber compression ring 8 by utilizing the inclined surface of the inner ring of the compression ring 6. This causes the rubber compression ring 8 to tighten, thereby compressing and tightening the intestinal tube 1 placed on the test pipe 2. The use of a threaded connection for driving and pressurizing allows for the application of stronger pressure, preventing leakage or detachment at the connection between the test pipe 2 and the intestinal tube 1 during the test.

[0024] Example 2: In Example 2, the intestinal tube 1 tested is an intestinal tube 1 with three openings, which can simulate the suturing of intestinal tubes 1 in different locations in the human body. One of the opening ends is still sutured using a stapler, another opening end is connected to the test tube 2 in Example 1, and the last opening end is closed using a compression component. The compression assembly includes a fixed frame 12, on which a control screw 13 is threadedly connected. The bottom of the control screw 13 is rotatably connected to a compression plate 14. The last open end of the intestinal tube 1 can pass through the inside of the fixed frame 12 and under the compression plate 14. By manually rotating the control screw 13, the compression plate 14 can squeeze the open end of the intestinal tube 1 and close the open end of the intestinal tube 1, so that the device can perform a suture pressure resistance test on an intestinal tube with three openings. A guide shaft 15 is fixedly connected inside the fixed frame 12. The guide shaft 15 passes through the pressure plate 14 and guides the pressure plate 14 so that the pressure plate 14 can only move up and down.

[0025] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. An anastomat suture port pressure resistance testing device, comprising a test pipeline (2), one end of the test pipeline (2) is connected with an intestinal canal (1) for simulating an intestinal canal for testing, characterized in that: One end of the intestinal tube (1) is provided with a suture opening (101) formed by suturing with a stapler, and one end of the test tube (2) is connected to an electric flow valve (3). The test pipe (2) is fitted with a fixed pipe (4) and an adjusting screw pipe (5). The fixed pipe (4) is fixedly connected to the test pipe (2). The fixed pipe (4) and the adjusting screw pipe (5) are threaded together. The end of the adjusting screw pipe (5) near the intestinal tube 1 (1) is rotatably connected to a compression ring (6). The inner surface of the compression ring (6) is an inclined surface. The test pipe (2) is also fitted with a limiting ring (7) and a rubber compression ring (8) located in front of the compression ring (6). The outer surface of the rubber compression ring (8) is an inclined surface that matches the inclined surface of the inner surface of the compression ring (6).

2. The device of claim 1, wherein the device is configured to measure the pressure of the anastomosis stapling port. The fixed pipe (4) is fixedly connected to the test pipe (2) via a fixed connecting rod (401).

3. The device of claim 2, wherein the device comprises a pressure source. The outer surface of the fixed tube (4) is provided with a positioning mechanism that limits the maximum movement distance of the limiting ring (7); The positioning mechanism includes a protruding plate (9) fixedly connected to the outer surface of the fixed tube (4), a movable connecting rod (10) is slidably connected to the protruding plate (9), one end of the movable connecting rod (10) is fixedly connected to the limiting ring (7), and the other end is fixedly connected to the limiting ring (11), which abuts against the protruding plate (9).

4. The device of claim 1, wherein, The anastomosis suture pressure resistance test device also includes a compression component for closing the extra opening of the intestinal tube (1). The compression component includes a fixed frame (12), on which a control screw (13) is threadedly connected, and a compression plate (14) is rotatably connected to the bottom end of the control screw (13).

5. The device of claim 4, wherein the device further comprises a pressure source. A guide shaft (15) is fixedly connected inside the fixed frame (12). The guide shaft (15) passes through the pressure plate (14) and is slidably connected to the pressure plate (14).

6. The device of claim 1, wherein the device is configured to measure the pressure of the anastomosis stapling port. The inlet of the electric flow valve (3) is used to connect to an external pressurized water pump.

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