Suction and perfusion integrated injection device for sacral canal cyst

Abstract

The invention relates to a sacral canal cyst suction and perfusion integrated injection device which integrates a plurality of injectors on a support and comprises two cyst suction injectors, a contrast agent storage injector and a biological albumen glue storage injector. The piston handles of the cyst suction injector and the contrast agent suction injector move synchronously through the synchronous driving piece, and synchronous operation of cyst fluid suction and contrast agent suction is achieved. The switch valve assembly is arranged and comprises a plurality of switch valves, connection and disconnection of the injectors and the annular guide pipe are accurately controlled, and accurate flowing of fluid in different stages is achieved. The support is provided with an injector clamping groove and a rotation stopping limiting groove, and an injector is stably installed. The device is integrated in operation, time is shortened, and efficiency is improved; the flow is accurately controlled, and the surgical risk is reduced; the injector is installed stably, and operation errors are reduced; the device is convenient to mount and easy to clean and disinfect, and a safer and more effective scheme is provided for sacral canal cyst treatment.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to an integrated injection device for aspiration and irrigation of sacral canal cysts. Background Technology

[0002] Sacral canal cysts are cystic lesions that occur in the sacral canal. During surgical treatment of sacral canal cysts, it is necessary to perform puncture and aspiration to remove the cystic fluid. Then, a contrast agent is injected into the cyst to complete precise imaging. After the imaging results meet the perfusion requirements, the contrast agent is removed, and finally, biological protein glue is injected into the cyst for filling, thus completing the treatment of sacral canal cysts.

[0003] In practice, the above treatment methods involve several steps, such as aspirating cyst fluid and infusing contrast agent. These steps require changing different syringes, which carries the risk of air entering the cyst and reduces operational efficiency. Furthermore, the intervals between these steps can easily lead to cyst collapse, causing venous plexus congestion and bleeding, thus increasing surgical risks. Summary of the Invention

[0004] The purpose of this invention is to provide an integrated aspiration and irrigation device for sacral canal cysts, thereby solving the aforementioned problems in the current treatment of sacral canal cysts.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A sacral canal cyst aspiration and irrigation integrated injection device includes a support, a cyst aspiration syringe, a contrast agent storage syringe, a contrast agent aspiration syringe, and a biological protein gel syringe. The cyst aspiration syringe, contrast agent storage syringe, contrast agent aspiration syringe, and biological protein gel syringe are circumferentially disposed on the support. The piston handles of the cyst aspiration syringe and the contrast agent aspiration syringe are connected to a synchronous drive unit, which drives the piston handles of the cyst aspiration syringe and the contrast agent aspiration syringe to move synchronously. The end of the support... The device is equipped with a switching valve assembly, which is connected to the cyst aspiration syringe, the contrast agent storage syringe, the contrast agent aspiration syringe, and the biological protein gel syringe. The switching valve assembly is provided with a needle mounting tube. The switching valve assembly is configured such that when the cyst aspiration syringe aspirates the cystic fluid of the sacral canal cyst, the contrast agent aspiration syringe can simultaneously aspirate the contrast agent in the contrast agent storage syringe, and after the cyst aspiration syringe has finished aspirating the cystic fluid of the sacral canal cyst, the contrast agent aspiration syringe can inject the contrast agent into the sacral canal cyst.

[0007] Further preferably, the stent is circumferentially provided with a first syringe locking groove, a second syringe locking groove, a third syringe locking groove, and a fourth syringe locking groove. The first syringe locking groove, the second syringe locking groove, the third syringe locking groove, and the fourth syringe locking groove are all arranged along the length direction of the stent. The first syringe locking groove is used to lock and fix the cyst aspiration syringe, the second syringe locking groove is used to lock and fix the contrast agent storage syringe, the third syringe locking groove is used to lock and fix the contrast agent aspiration syringe, and the fourth syringe locking groove is used to lock and fix the biological protein glue syringe.

[0008] In a further preferred embodiment, the bracket is provided with a syringe anti-rotation limiting groove at one end away from the switch valve assembly. The syringe anti-rotation limiting groove is circumferentially disposed on the outer wall of the bracket. The handles of the cyst aspiration syringe, contrast agent storage syringe, contrast agent aspiration syringe, and biological protein glue syringe are used to engage in the syringe anti-rotation limiting groove.

[0009] Further preferably, the bottom of the first syringe locking groove, the second syringe locking groove, the third syringe locking groove and the fourth syringe locking groove are all arc-shaped to fit the syringe, and a locking part is provided in the middle to restrict the syringe from detaching. The two sides of the top are provided with locking guide surfaces.

[0010] Further preferably, the switching valve assembly includes an annular conduit, a first switching valve, a second switching valve, a third switching valve, and a fourth switching valve. The cyst aspiration syringe is connected to the annular conduit via the first switching valve. The contrast agent storage syringe is connected to the annular conduit via the second switching valve. The contrast agent aspiration syringe is connected to the annular conduit via the third switching valve. The bio-protein gel syringe is connected to the annular conduit via the fourth switching valve. A needle mounting tube is provided on the annular conduit at a position corresponding to the first switching valve. A fifth switching valve is provided on the annular conduit between the first and second switching valves. A sixth switching valve is provided on the annular conduit between the second and third switching valves. A seventh switching valve is provided on the annular conduit between the third and fourth switching valves. An eighth switching valve is provided on the annular conduit between the fourth switching valve and the first switching valve.

[0011] Preferably, a support frame is provided on the bracket at one end where the annular conduit is located, and the annular conduit is mounted on the support frame.

[0012] Preferably, the edge of the support frame is provided with a fixing groove, and the annular conduit is engaged in the fixing groove.

[0013] Further preferably, the synchronization drive includes a snap-fit ​​plate for connecting the piston rods of the cyst aspiration syringe and the contrast agent storage syringe, the snap-fit ​​plate being detachably connected to the piston rods of the cyst aspiration syringe and the contrast agent storage syringe.

[0014] In a further preferred embodiment, the bottom surface of the snap-fit ​​plate is provided with a snap-fit ​​groove in the circumferential direction. The snap-fit ​​groove is used to snap into the piston rod of the cyst aspiration syringe and the contrast agent storage syringe. One end of the snap-fit ​​groove is closed and the other end is open.

[0015] Further preferably, a pull part is provided on the top surface of the snap-fit ​​plate, which can drive the piston rods of the cyst aspiration syringe and the contrast agent storage syringe to move synchronously by pulling the pull part.

[0016] The beneficial effects of this invention are:

[0017] The sacral canal cyst aspiration and irrigation integrated injection device of the present invention integrates multiple syringes on a single support and achieves precise communication control between each syringe and the annular catheter through a switching valve assembly. A synchronous drive component enables the piston handles of the cyst aspiration syringe and the contrast agent aspiration syringe to move synchronously. While aspirating cystic fluid from the sacral canal cyst, contrast agent can be simultaneously aspirated from the contrast agent storage syringe. This overcomes the limitations of traditional treatment methods where each operation is independent and requires repeated insertion into the cyst, achieving precise injection of contrast agent and biological protein gel. Therefore, repeated needle insertion and removal are unnecessary, significantly shortening the overall operation time, reducing the intervals between operations, and significantly improving treatment efficiency.

[0018] Furthermore, the switching valve assembly incorporates multiple switching valves, including first to fourth and fifth to eighth switching valves. These valves enable precise control over the on / off relationship between each syringe and the annular catheter. During different operational stages, such as aspirating balloon fluid, injecting contrast agent, and perfusing biological protein gel, accurately opening and closing the corresponding switching valves ensures that the fluid flows along the predetermined path, preventing fluid misflow and thus achieving precise control over the treatment process, guaranteeing the safety and effectiveness of the treatment.

[0019] Furthermore, the support is equipped with multiple syringe locking slots, each with a bottom arc-shaped structure, a middle locking portion, and a top locking guide surface, providing stable and reliable fixation and positioning for each syringe. In addition, a syringe anti-rotation limiting groove is provided at the end of the support away from the switching valve assembly, matching the syringe handle to further prevent syringe rotation during use. These designs ensure the stability of the syringe during operation, reducing operational errors and safety risks caused by syringe shaking or displacement, providing strong assurance for successful treatment. Simultaneously, this design allows for the modification of existing syringes; syringes can be quickly assembled using the support, switching valve assembly, and synchronous drive component of this invention, enabling rapid treatment of sacral canal cysts using existing syringes. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the integrated injection device for aspiration and irrigation of sacral canal cysts according to the present invention;

[0021] Figure 2 yes Figure 1 A structural diagram from another angle;

[0022] Figure 3 This is a schematic diagram of the structure of the stent in the integrated injection device for aspiration and perfusion of sacral canal cysts of the present invention;

[0023] Figure 4 yes Figure 3 A structural diagram from another angle;

[0024] Figure 5 This is a schematic diagram of the synchronous drive component in the integrated injection device for aspiration and perfusion of sacral canal cysts of the present invention;

[0025] Figure 6 This is a schematic diagram of the switching valve assembly in the integrated injection device for aspiration and perfusion of sacral cysts of the present invention.

[0026] The names corresponding to each mark in the diagram:

[0027] 1. Support; 101. First syringe locking groove; 1011. Locking part; 1012. Locking guide surface; 102. Second syringe locking groove; 103. Third syringe locking groove; 104. Fourth syringe locking groove; 105. Syringe anti-rotation limiting groove.

[0028] 2. Cyst aspiration syringe,

[0029] 3. Contrast agent storage syringe,

[0030] 4. Contrast agent aspiration syringe,

[0031] 5. Biological protein gel syringe,

[0032] 6. Switch valve assembly; 601. Annular conduit; 602. First switch valve; 603. Second switch valve; 604. Third switch valve; 605. Fourth switch valve; 606. Needle mounting tube; 608. Fifth switch valve; 609. Sixth switch valve; 610. Seventh switch valve; 611. Eighth switch valve.

[0033] 7. Support frame, 701. Fixing groove,

[0034] 801. Snap-fit ​​plate; 802. Snap-fit ​​slide; 803. Hand pull part. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention are within the scope of protection of the present invention.

[0036] Figure 1 - Figure 6 As shown, this integrated aspiration and irrigation device for sacral canal cysts aims to solve problems such as air entering the cyst due to syringe changes, low operational efficiency, and increased surgical risks due to venous engorgement and bleeding caused by cyst collapse during traditional surgical treatment of sacral canal cysts. Through ingenious structural design, the device integrates the cyst aspiration syringe, contrast agent storage syringe, contrast agent aspiration syringe, and biological protein gel syringe onto a support. Synchronous drive components and switching valve assemblies achieve tight connection and precise control of each operational step, providing an efficient and safe integrated solution for the treatment of sacral canal cysts.

[0037] like Figure 3 and Figure 4 As shown, the bracket 1 serves as the main support for the entire device, fixing and positioning the syringes. The main body of the bracket 1 is cylindrical, and it is provided with a first syringe locking groove 101, a second syringe locking groove 102, a third syringe locking groove 103, and a fourth syringe locking groove 104 spaced apart on its circumference. These four locking grooves extend along the length of the bracket and are evenly distributed on the circumference of the bracket.

[0038] The first syringe locking groove 101 is used to lock and fix the cyst aspiration syringe 2. Its bottom has an arc-shaped structure adapted to the outer diameter of the cyst aspiration syringe 2. This arc-shaped design allows for a better fit to the syringe and provides stable support. A locking part 1011 is provided in the middle. The locking part 1011 has a certain degree of elasticity. When the cyst aspiration syringe 2 is placed into the locking groove, the locking part 1011 will slightly deform due to the pressure of the syringe. After the syringe is in place, the locking part 1011 returns to its original shape, thus preventing the syringe from detaching from the locking groove. Locking guide surfaces 1012 are provided on both sides of the top. The locking guide surfaces 1012 are sloped, facilitating the smooth entry of the syringe into the locking groove during installation and reducing difficulties and errors during the installation process.

[0039] The second syringe locking groove 102 is used to lock and fix the contrast agent storage syringe 3, and its structure is the same as that of the first syringe locking groove 101. It also has a bottom arc-shaped structure, a middle locking part and a top locking guide surface to ensure that the contrast agent storage syringe 3 can be stably installed on the bracket.

[0040] The third syringe locking groove 103 is used to lock and fix the contrast agent aspiration syringe 4. It has a bottom arc-shaped structure, a middle locking part and a top locking guide surface, providing a stable installation position for the contrast agent aspiration syringe 4.

[0041] The fourth syringe locking groove 104 is used to lock and fix the biological protein glue syringe 5. Its bottom arc structure, middle locking part and top locking guide surface design ensure the stable installation of the biological protein glue syringe 5 on the bracket.

[0042] At the end of the support furthest from the valve assembly, a syringe anti-rotation limiting groove 105 is provided. The syringe anti-rotation limiting groove 105 is circumferentially located on the outer wall of the support, and its shape matches the handle of the syringe. The handles of the cyst aspiration syringe 2, contrast agent storage syringe 3, contrast agent aspiration syringe 4, and biological protein gel syringe 5 can be engaged in the syringe anti-rotation limiting groove 105, further preventing the syringes from rotating during use and ensuring operational stability and accuracy.

[0043] like Figure 6 As shown, the switching valve assembly 6 is a key component for achieving precise control of each operational stage of this device. It includes an annular conduit 601, a first switching valve 602, a second switching valve 603, a third switching valve 604, and a fourth switching valve 605.

[0044] The cyst aspiration syringe 2 is connected to the annular catheter 601 via the first switch valve 602. When the first switch valve 602 is opened, the cyst aspiration syringe 2 and the annular catheter 601 form a passage, and the cyst fluid in the sacral canal cyst can be aspirated by operating the cyst aspiration syringe 2.

[0045] The contrast agent storage syringe 3 is connected to the annular catheter 601 via a second switching valve 603. The second switching valve 603 controls the connection between the contrast agent storage syringe 3 and the annular catheter 601. When it is necessary to inject contrast agent into the cyst, the second switching valve 603 is opened, allowing the contrast agent to enter the annular catheter 601 from the contrast agent storage syringe 3.

[0046] The contrast agent aspiration syringe 4 is connected to the annular catheter 601 via a third switching valve 604. The third switching valve 604 controls the connection between the contrast agent aspiration syringe 4 and the annular catheter 601. When aspirating contrast agent from the contrast agent storage syringe 3, the third switching valve 604 is opened, and simultaneously, in conjunction with the action of the synchronous drive, the contrast agent is aspirated. When injecting contrast agent into the cyst, the operation is also accomplished by controlling the opening and closing of the third switching valve 604.

[0047] The biological protein glue injector 5 is connected to the circular catheter 601 via the fourth switch valve 605. After the angiography operation is completed and the angiography results meet the perfusion requirements, the fourth switch valve 605 is opened, and the biological protein glue in the biological protein glue injector 5 is injected into the sacral canal cyst for tamponade treatment.

[0048] A needle mounting tube 606 is provided on the annular catheter 601 at a position corresponding to the first switch valve 602. In actual use, a bone aspiration needle or a fine puncture needle for vertebral body shaping is first used to tap into the sacral canal. The end of the needle mounting tube is equipped with a syringe connector. Then, the needle mounting tube 606 is inserted into the syringe connector to perform operations such as aspiration of cyst fluid, injection of contrast agent and perfusion of biological protein glue.

[0049] Furthermore, a fifth switching valve 608 is provided on the annular conduit 601 between the first switching valve 602 and the second switching valve 603; a sixth switching valve 609 is provided between the second switching valve 603 and the third switching valve 604; a seventh switching valve 610 is provided between the third switching valve 604 and the fourth switching valve 605; and an eighth switching valve 611 is provided between the fourth switching valve 605 and the first switching valve 602. The arrangement of these switching valves further refines the fluid control between each operational stage, ensuring accurate on / off relationships between each syringe and the annular conduit 601 at different operational phases, and preventing fluid misflow.

[0050] To ensure stable installation of the annular conduit 601, a support frame 7 is provided on the bracket at one end where the annular conduit 601 is located. A fixing groove 701 is provided on the edge of the support frame 7, and the annular conduit 601 is snapped into the fixing groove 701. The shape of the fixing groove 701 is adapted to the outer diameter of the annular conduit 601, which can tightly fix the annular conduit 601, preventing it from shaking or shifting during operation, and ensuring the stability and reliability of the entire switching valve assembly.

[0051] like Figure 2 and Figure 5 As shown, the synchronous drive is used to achieve synchronous movement of the piston rods of the cyst aspiration syringe 2 and the contrast agent aspiration syringe 4. It includes a snap-fit ​​plate 801, which is detachably connected to the piston rods of the cyst aspiration syringe 2 and the contrast agent aspiration syringe 4.

[0052] The bottom surface of the snap-fit ​​plate 801 is provided with a snap-fit ​​groove 802, which is used to snap into the piston rod of the cyst aspiration syringe 2 and the contrast agent aspiration syringe 4. One end of the snap-fit ​​groove 802 is closed, and the other end is open. This design facilitates the sliding of the piston rod into the snap-fit ​​groove 802 from the open end during installation, enabling quick assembly and disassembly.

[0053] A pull part 803 is provided on the top surface of the snap-fit ​​plate 801. By pulling the pull part 803, the piston rods of the cyst aspiration syringe 2 and the contrast agent aspiration syringe 4 can be moved synchronously. In actual operation, when it is necessary to aspirate the cyst fluid in the sacral canal cyst, the first switch valve 602, the second switch valve 603, the third switch valve 604, and the sixth switch valve 609 are opened, and other relevant switch valves are closed. Then, the pull part 803 is pulled, and the snap-fit ​​plate 801 drives the piston rods of the cyst aspiration syringe 2 and the contrast agent aspiration syringe 4 to move backward synchronously. At this time, the cyst aspiration syringe 2 generates negative pressure, drawing the cyst fluid into the syringe; at the same time, the contrast agent aspiration syringe 4 also generates negative pressure, drawing contrast agent from the contrast agent storage syringe 3. After the cyst aspiration syringe 2 aspirates the cyst fluid, the first switch valve 602 and the second switch valve 603 are closed, the fifth switch valve 608 is opened, and the retaining plate 801 is removed. This allows the contrast agent aspiration syringe 4 to inject the aspirated contrast agent into the sacral canal cyst through the needle mounting tube 606, completing the contrast procedure. This synchronous drive design enables rapid aspiration of cyst fluid and injection of contrast agent, significantly shortening the operation time, reducing the intervals between each step, effectively avoiding problems such as venous plexus engorgement, congestion, and bleeding caused by cyst collapse, and reducing surgical risks.

[0054] Overall workflow of the device:

[0055] When using this integrated sacral canal cyst aspiration and irrigation device for sacral canal cyst treatment, first, install each syringe onto the support. Insert the cyst aspiration syringe 2 into the first syringe locking slot 101, and lock its handle into the syringe anti-rotation limiting slot 105. Similarly, install the contrast agent storage syringe 3, contrast agent aspiration syringe 4, and biological protein gel syringe 5 into the second syringe locking slot 102, third syringe locking slot 103, and fourth syringe locking slot 104, respectively, ensuring that the handles of each syringe are locked into the syringe anti-rotation limiting slot 105. Then, connect the locking plate 801 to the piston rods of the cyst aspiration syringe 2 and the contrast agent aspiration syringe 4 via the locking slide 802.

[0056] Next, using a bone aspiration needle or a fine puncture needle specifically designed for vertebral body shaping, the cyst in the sacral canal is punctured to establish a channel to the inside of the cyst. The bone aspiration needle or fine puncture needle is then connected to the needle mounting tube 606. After successful puncture, the states of the various valves are adjusted according to the operational requirements. When aspirating the cyst fluid, the first valve 602, the second valve 603, the third valve 604, and the sixth valve 609 are opened, while other relevant valves are closed. Pulling the lever 803 causes the piston rods of the cyst aspiration syringe 2 and the contrast agent aspiration syringe 4 to move backward synchronously, achieving simultaneous aspiration of the cyst fluid and the contrast agent.

[0057] After the cyst aspiration syringe 2 aspirates the cyst fluid, the first switch valve 602 and the second switch valve are closed, the fifth switch valve 608 is opened, and the retaining plate 801 is removed. This allows the contrast agent aspiration syringe 4 to inject the aspirated contrast agent into the sacral canal cyst through the needle mounting tube 606, completing the contrast procedure. After the contrast procedure, the results are observed. If the perfusion requirements are met, the contrast agent is again aspirated from the sacral canal cyst using the contrast agent aspiration syringe 4. Then, the fourth switch valve 605 and the eighth switch valve 611 are opened, the other switch valves are closed, and the piston of the biological protein glue syringe 5 is pushed to inject the biological protein glue into the sacral canal cyst for tamponade treatment. After treatment, the device is cleaned and disinfected for future use.

[0058] This integrated aspiration and irrigation injection device for sacral canal cysts achieves integrated and precise control of each operational step in the treatment of sacral canal cysts through the aforementioned structural design and workflow. It can also be assembled on-site using existing syringes, allowing for rapid modification of existing syringes. This effectively solves the problems existing in traditional treatment methods and provides a more efficient and safer method and tool for the treatment of sacral canal cysts.

Claims

1. A sacral canal cyst aspiration and irrigation integrated injection device, characterized in that: The device includes a stent, a cyst aspiration syringe, a contrast agent storage syringe, a contrast agent aspiration syringe, and a biological protein gel syringe. These syringes are circumferentially mounted on the stent. The piston handles of the cyst aspiration syringe and the contrast agent aspiration syringe are connected to a synchronous drive unit, which drives the piston handles of the two syringes to move synchronously. A switching valve assembly is located at the end of the stent. The switching valve assembly is connected to the cyst aspiration syringe, the contrast agent storage syringe, the contrast agent aspiration syringe, and the biological protein gel syringe. The switching valve assembly is provided with a needle mounting tube. The switching valve assembly is configured such that when the cyst aspiration syringe aspirates the cystic fluid of the sacral canal cyst, the contrast agent aspiration syringe can simultaneously aspirate the contrast agent in the contrast agent storage syringe, and after the cyst aspiration syringe has aspirated the cystic fluid of the sacral canal cyst, the contrast agent aspiration syringe can inject the contrast agent into the sacral canal cyst.

2. The integrated injection device for aspiration and irrigation of sacral canal cysts according to claim 1, characterized in that: The stent is circumferentially spaced with a first syringe locking groove, a second syringe locking groove, a third syringe locking groove, and a fourth syringe locking groove. The first syringe locking groove, the second syringe locking groove, the third syringe locking groove, and the fourth syringe locking groove are all arranged along the length direction of the stent. The first syringe locking groove is used to lock and fix the cyst aspiration syringe, the second syringe locking groove is used to lock and fix the contrast agent storage syringe, the third syringe locking groove is used to lock and fix the contrast agent aspiration syringe, and the fourth syringe locking groove is used to lock and fix the biological protein glue syringe.

3. The integrated injection device for aspiration and irrigation of sacral canal cysts according to claim 2, characterized in that: The bracket has a syringe anti-rotation limiting groove at one end away from the switch valve assembly. The syringe anti-rotation limiting groove is circumferentially disposed on the outer wall of the bracket. The handle of the cyst aspiration syringe, contrast agent storage syringe, contrast agent aspiration syringe and biological protein glue syringe is used to engage in the syringe anti-rotation limiting groove.

4. The integrated injection device for aspiration and irrigation of sacral canal cysts according to claim 3, characterized in that: The bottom of the first syringe locking groove, the second syringe locking groove, the third syringe locking groove and the fourth syringe locking groove are all arc-shaped to fit the syringe, and a locking part is provided in the middle to restrict the syringe from detaching. The two sides of the top are provided with locking guide surfaces.

5. The integrated injection device for aspiration and irrigation of sacral canal cysts according to claim 1, characterized in that: The switching valve assembly includes an annular conduit, a first switching valve, a second switching valve, a third switching valve, and a fourth switching valve. The cyst aspiration syringe is connected to the annular conduit via the first switching valve. The contrast agent storage syringe is connected to the annular conduit via the second switching valve. The contrast agent aspiration syringe is connected to the annular conduit via the third switching valve. The biological protein gel syringe is connected to the annular conduit via the fourth switching valve. A needle mounting tube is provided on the annular conduit at a position corresponding to the first switching valve. A fifth switching valve is provided on the annular conduit between the first and second switching valves. A sixth switching valve is provided on the annular conduit between the second and third switching valves. A seventh switching valve is provided on the annular conduit between the third and fourth switching valves. An eighth switching valve is provided on the annular conduit between the fourth switching valve and the first switching valve.

6. The integrated injection device for aspiration and irrigation of sacral canal cysts according to claim 5, characterized in that: A support frame is provided on the bracket at one end where the annular conduit is located, and the annular conduit is mounted on the support frame.

7. The integrated injection device for aspiration and irrigation of sacral canal cysts according to claim 6, characterized in that: The edge of the support frame is provided with a fixing groove, and the annular conduit is engaged in the fixing groove.

8. The integrated injection device for aspiration and irrigation of sacral canal cysts according to claim 1, characterized in that: The synchronization drive includes a snap-fit ​​plate for connecting the piston rods of the cyst aspiration syringe and the contrast agent storage syringe, the snap-fit ​​plate being detachably connected to the piston rods of the cyst aspiration syringe and the contrast agent storage syringe.

9. The integrated injection device for aspiration and irrigation of sacral canal cysts according to claim 8, characterized in that: The bottom surface of the snap-fit ​​plate is provided with a snap-fit ​​groove in the circumferential direction. The snap-fit ​​groove is used to snap into the piston rod of the cyst aspiration syringe and the contrast agent storage syringe. One end of the snap-fit ​​groove is closed and the other end is open.

10. The sacral canal cyst aspiration and irrigation integrated injection device according to claim 9, characterized in that: The top surface of the snap-fit ​​plate is provided with a pull part, which can drive the piston rods of the cyst aspiration syringe and the contrast agent storage syringe to move synchronously by pulling the pull part.

Images