Extraperitoneal cavity dilator

Abstract

The utility model is suitable for the technical field of abdominal surgery, and provides an extraperitoneal cavity dilator which comprises an operation end, the bottom of the operation end is in threaded connection with an inflation pipeline, a check valve is installed on the inner wall of the inflation pipeline, and a balloon dilator is arranged at the bottom of the inflation pipeline. The inflation pipeline is of a hollow cylinder structure and comprises a bent section used for bending, a reinforcing layer is arranged at the bottom of the bent section, and the check valve is arranged at the tail end of the reinforcing layer in the same direction. The check valve comprises an air cavity, the air cavity is formed in the middle section of the check valve, an air inlet is formed in one end of the air cavity, an air outlet is formed in the other end of the air cavity, the air inlet is formed in the end close to the bent section, and a check module is installed in the air cavity. According to the device, one-way flowing of gas is ensured through the non-return module, backflow and leakage are avoided, deflation can be achieved through the deflation rod, and operation stability and high adaptability are achieved.

Description

Technical Field

[0001] This utility model relates to the field of abdominal surgery technology, and more specifically, to an extraperitoneal dilator. Background Technology

[0002] An extraperitoneal dilator is a medical device used in laparoscopic or minimally invasive surgery to create and maintain an extraperitoneal surgical operating space during the procedure. The device typically consists of a balloon, catheter, and inflation / deflation system. Inflating the balloon by injecting gas or liquid pushes apart the tissue between the peritoneum and abdominal wall, creating sufficient operating space. This technique effectively reduces surgical trauma, lowers postoperative complications, and improves surgical precision and safety, thus finding widespread application in minimally invasive surgery.

[0003] Existing extraperitoneal dilators are relatively convenient for inflation, but deflation and removal after surgery often present challenges. This is mainly because the dilator typically contains a check valve to prevent accidental gas leakage during surgery. However, the one-way nature of this check valve makes it difficult for gas to escape naturally, causing the balloon to fail to collapse quickly during deflation. Currently, most extraperitoneal dilators rely on puncturing the balloon or catheter with a needle to release gas, which not only adds extra steps but may also damage the instrument, affecting its effectiveness. Therefore, optimizing the deflation structure of extraperitoneal dilators to maintain inflation stability while enabling more convenient deflation is a pressing issue in the field.

[0004] Therefore, this application proposes an extraperitoneal cavity dilator. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide an extraperitoneal cavity dilator.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] An extraperitoneal cavity dilator includes an operating end, the bottom of which is threadedly connected to an inflation line, a check valve is installed on the inner wall of the inflation line, and a balloon dilator is provided at the bottom of the inflation line.

[0008] The inflation pipeline is configured as a hollow cylindrical structure, and the inflation pipeline includes a bending section for bending. A reinforcing layer is provided at the bottom of the bending section, and the check valve is arranged in the same direction at the end of the reinforcing layer.

[0009] The check valve includes an air chamber located in the middle section of the check valve. One end of the air chamber has an air inlet, and the other end has an air outlet. The air inlet is located near the bend. A check valve module is installed inside the air chamber to prevent gas leakage from the balloon dilator.

[0010] The present invention is further configured such that: the diameter of the air inlet and the air outlet are the same, and the diameter of the air cavity is larger than the diameter of the air inlet.

[0011] The present invention is further configured such that: the operating end includes an installation port, a fastening ring is provided at the bottom of the installation port, a stud is installed at the bottom of the fastening ring, the stud is adapted to the shape of the inflation pipe, and a gripping end is provided on one side of the fastening ring.

[0012] The present invention is further configured such that: the inflation pipeline also includes a pipe body, and the inner wall of the pipe body near the operating end is provided with a threaded groove, the threaded groove is adapted to the shape of the stud, and the threaded groove can be threadedly connected to the reinforcing layer.

[0013] The present invention is further configured such that the bent section is configured as a corrugated pipe structure.

[0014] The present invention is further configured such that: the anti-reverse module includes an installation arm rotatably connected to the inner wall of the air chamber, and a rotating arm is fixedly provided on the installation arm, and the installation arm and the rotating arm are arranged perpendicularly.

[0015] The present invention is further configured such that: a blocking block is installed at the end of the rotating arm away from the mounting arm, and a rubber pad is provided on the top of the blocking block.

[0016] The present invention is further configured such that: the balloon dilator includes an inner layer, and an outer layer is sleeved on the outer wall of the inner layer.

[0017] In summary, this application includes at least one of the following beneficial technical effects:

[0018] 1. This application uses a check valve module design to ensure unidirectional gas flow, prevent gas backflow, improve the stability of the expansion process, and avoid affecting the surgical outcome due to gas leakage. The top of the plug is equipped with a rubber pad that can fit tightly with the air inlet to ensure good airtightness, prevent gas leakage during expansion, and enhance the reliability of the equipment. When it is necessary to release gas, the doctor can push the check valve plug with the gas release rod to achieve precise gas release, ensuring the controllability and safety of the surgical operation.

[0019] 2. The locking ring secures the air injection tube, and the ergonomically designed grip allows doctors to easily hold and operate the device, preventing it from slipping and improving ease of use.

[0020] 3. The bending section of the inflation tubing adopts a corrugated structure, which enables it to expand and bend. Doctors can adjust the direction and depth of expansion as needed to avoid excessive or inaccurate expansion and improve adaptability. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of an extraperitoneal cavity dilator according to the present invention.

[0022] Figure 2 This is a top view of the stop valve of this utility model.

[0023] Figure 3 for Figure 3 A sectional view taken along line AA.

[0024] Explanation of reference numerals in the attached diagram: 1. Operating end; 11. Mounting port; 12. Fastening ring; 13. Stud; 14. Holding end;

[0025] 2. Inflation piping; 21. Pipe body; 22. Bend section; 23. Reinforcing layer; 24. Threaded groove;

[0026] 3. Check valve; 31. Air chamber; 32. Air inlet; 33. Air outlet; 34. Check valve module; 341. Mounting arm; 342. Rotating arm; 343. Plug; 344. Rubber pad;

[0027] 4. Balloon dilator; 41. Inner layer; 42. Outer layer. Detailed Implementation

[0028] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0029] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0030] Example 1, please refer to Figures 1-3 The present invention provides the following technical solution:

[0031] Specifically, it refers to an extraperitoneal cavity dilator, see [link to relevant documentation]. Figure 1The operating end 1 includes an installation port 11, located at the top for easy connection of the inflation tubing during use. When gas needs to be injected into the extraperitoneal dilator, the inflation tubing can be installed through the installation port 11 to ensure smooth gas input. A locking ring 12 is located at the bottom of the installation port 11, which locks the installed inflation tubing in place, preventing accidental dislodgement during operation and ensuring effective expansion. A stud 13 is installed at the bottom of the locking ring 12, its shape conforming to the inflation tubing 2, allowing for a secure threaded connection between the operating end 1 and the inflation tubing 2, ensuring airtightness and stability. A grip end 14 is located on one side of the locking ring 12, ergonomically designed for easy gripping by the surgeon, providing better control and effectively preventing the extraperitoneal dilator from slipping and affecting the surgical procedure.

[0032] The inflation line 2 adopts a hollow cylindrical structure to ensure smooth gas delivery. The inflation line 2 includes a tube body 21, and the inner wall of the tube body 21 near the operating end 1 is provided with a threaded groove 24. The threaded groove 24 is adapted to the shape of the stud 13 to achieve a reliable threaded connection, ensuring a stable connection between the operating end 1 and the inflation line 2, preventing gas leakage, and improving the safety and durability of the extraperitoneal dilator.

[0033] The bottom of the tube body 21 is provided with a bending section 22 for bending, which adopts a corrugated tube structure design. The corrugated tube structure not only enhances the flexibility of the inflation tube 2, allowing it to freely expand and contract within a certain range and bend at small angles, but also helps doctors adjust the direction and depth of expansion according to specific surgical needs, improving the precision of the surgery and avoiding the problem of difficulty in operation due to excessive expansion. The bottom of the bending section 22 is further provided with a reinforcing layer 23 to enhance its structural strength, improve durability, prevent tube damage or leakage due to frequent bending, and ensure the smooth progress of the surgery. The check valve 3 is installed in the same direction at the tail end of the reinforcing layer 23, which can effectively prevent gas backflow, maintain the stable inflation state of the balloon dilator 4, thereby ensuring effective expansion of the extraperitoneal cavity and improving the safety and reliability of clinical use.

[0034] Please see Figure 3 The check valve 3 includes an air chamber 31, which is located in the middle section of the check valve 3. One end of the air chamber 31 has an air inlet 32, and the other end has an air outlet 33. The air inlet 32 ​​is located near the bend section 22. When external gas is injected, it enters through the air inlet 32. The diameters of the air inlet 32 ​​and the air outlet 33 are the same, while the diameter of the air chamber 31 is larger than the diameter of the air inlet 32. A check valve module 34 is installed inside the air chamber 31 to prevent gas leakage from the balloon dilator 4.

[0035] The backflow prevention module 34 includes a mounting arm 341 rotatably connected to the inner wall of the gas chamber 31. A rotating arm 342 is fixedly mounted on the mounting arm 341. The mounting arm 341 and the rotating arm 342 are perpendicular to each other to ensure that the rotating arm 342 can rotate flexibly and achieve unidirectional gas flow control. A plug 343 is mounted on the end of the rotating arm 342 away from the mounting arm 341. The plug 343 adopts a cylindrical structure with different diameters at both ends to optimize the sealing effect. A rubber gasket 344 is provided on the top of the plug 343. The rubber gasket 344 can enhance the sealing between the plug 343 and the air inlet 32 ​​and ensure the reliability of the backflow prevention function.

[0036] Specifically, when gas enters, it enters the air chamber 31 through the inflation line 2. Subsequently, the gas pressure acts on the check valve module 34, causing the mounting arm 341 to rotate, which in turn drives the rotating arm 342 to rotate synchronously, pushing the plug 343 and the rubber pad 344 on its top to deflect. At this time, the plug 343 moves away from the air inlet 32, forming a gap between it and the air inlet 32 ​​for gas injection, allowing gas to smoothly enter the balloon dilator 4.

[0037] After the gas injection is completed, the balloon dilator 4 is filled with gas. The internal pressure acts on the air outlet 33, causing the plug 343 to be subjected to reverse pressure. This causes the plug 343 to return to its initial position and fit tightly against the air inlet 32, completely sealing the gas channel, preventing gas backflow, and ensuring the stability of the dilator.

[0038] When venting is required, the doctor can insert a venting rod through the mounting port 11 and push it into the check valve 3. This causes the plug 343 to rotate under external force, creating a venting channel between the plug 343 and the air inlet 32. At this time, gas can slowly overflow from the air inlet 32, achieving a controllable venting process. This allows the doctor to adjust the expansion state according to the surgical needs, improving the flexibility and safety of the equipment.

[0039] The balloon dilator 4 includes an inner layer 41, and an outer layer 42 is fitted over the outer wall of the inner layer 41. The inner layer 41 is made of thermoplastic polyurethane, which has high strength, while the outer layer 42 is made of high-density polyethylene, which enhances the support of the balloon dilator 4 and can prevent foreign objects or surgical procedures from puncturing the balloon dilator 4.

[0040] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

Claims

1. An extraperitoneal cavity dilator, characterized in that: Includes an operating end (1), the bottom of which is threadedly connected to an inflation line (2), a check valve (3) is installed on the inner wall of the inflation line (2), and a balloon dilator (4) is provided at the bottom of the inflation line (2). The inflation pipeline (2) is configured as a hollow cylindrical structure. The inflation pipeline (2) includes a bending section (22) for bending. A reinforcing layer (23) is provided at the bottom of the bending section (22). The check valve (3) is arranged in the same direction at the end of the reinforcing layer (23). The check valve (3) includes an air chamber (31), which is located in the middle section of the check valve (3). One end of the air chamber (31) is provided with an air inlet (32), and the other end of the air chamber (31) is provided with an air outlet (33). The air inlet (32) is located near the bend section (22). A check valve module (34) is installed in the air chamber (31). The check valve module (34) is used to prevent gas leakage from the balloon dilator (4).

2. The extraperitoneal dilator according to claim 1, characterized in that: The air inlet (32) and the air outlet (33) have the same diameter, and the air chamber (31) has a larger diameter than the air inlet (32).

3. The extraperitoneal dilator according to claim 1, characterized in that: The operating end (1) includes an installation port (11), a fastening ring (12) is provided at the bottom of the installation port (11), a stud (13) is installed at the bottom of the fastening ring (12), the stud (13) is adapted to the shape of the inflation pipe (2), and a gripping end (14) is provided on one side of the fastening ring (12).

4. The extraperitoneal dilator according to claim 1, characterized in that: The inflation pipeline (2) also includes a pipe body (21). The inner wall of the pipe body (21) near the operating end (1) is provided with a threaded groove (24). The threaded groove (24) is adapted to the shape of the stud (13). The threaded groove (24) can be threadedly connected to the reinforcing layer (23).

5. The extraperitoneal dilator according to claim 1, characterized in that: The bent section (22) is configured as a corrugated pipe structure.

6. The extraperitoneal dilator according to claim 1, characterized in that: The anti-reverse module (34) includes an installation arm (341) rotatably connected to the inner wall of the air chamber (31), and a rotating arm (342) is fixedly provided on the installation arm (341). The installation arm (341) and the rotating arm (342) are arranged perpendicularly.

7. The extraperitoneal dilator according to claim 6, characterized in that: A block (343) is installed at the end of the rotating arm (342) away from the mounting arm (341), and a rubber pad (344) is provided on the top of the block (343).

8. The extraperitoneal dilator according to claim 1, characterized in that: The balloon dilator (4) includes an inner layer (41) and an outer layer (42) is fitted over the outer wall of the inner layer (41).

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