Hepatic cyst drainage internal circulation device under ultrasonic guidance and use method of hepatic cyst drainage internal circulation device

Abstract

The invention discloses an ultrasonic-guided hepatic cyst drainage internal circulation device which comprises a drainage device made of a material capable of being absorbed by a human body. The drainage device comprises a drainage part and a pair of limiting parts fixedly connected to the two ends of the drainage part, and the drainage part is communicated with the interiors of the limiting parts; the drainage part is limited in the cyst through the limiting parts, and liquid in the cyst is drained into the drainage part through one limiting part, so that the liquid flows out of the other limiting part to the abdominal cavity, and in-vivo drainage is achieved; a catheter and a drainage device do not need to be inserted in the abdominal cavity all the time in the drainage process, so that continuous drainage can be conducted, the drainage mode is optimized, pertinence is better achieved, and discomfort of a patient during drainage is relieved.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and in particular to an ultrasound-guided liver cyst drainage internal circulation device and a use method thereof. Background Art

[0002] Liver cyst is a common benign liver disease. Cysts are generally round or oval in shape, with thin cyst walls, and can be found in imaging examinations. The clinical symptoms of liver cysts vary depending on the type. Some cysts have no symptoms. When the size increases or compresses important tissues, abdominal distension and discomfort may occur, and the skin and mucous membranes may turn yellow. The existing treatment method for liver cysts is extracorporeal drainage, that is, draining the fluid in the liver cyst to the outside of the body through a catheter. Although this method can drain the fluid in the cyst, when the catheter is removed, cystic fluid may still be produced in the cyst. Extracorporeal drainage consumables are relatively large, and the economic burden on patients is heavy. At the same time, during the drainage process, the presence of the catheter also greatly limits the patient's activity space. However, the liquid composition in some cysts is simple and can be absorbed by the greater omentum in the abdominal cavity. A more targeted drainage method is urgently needed. In order to optimize the treatment method, the present invention provides an ultrasound-guided liver cyst drainage internal circulation device and a method for using the same. Summary of the invention

[0003] The object of the present invention is to provide an ultrasound-guided liver cyst drainage internal circulation device and a method of using the same, so as to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above object, the present invention provides the following technical solutions: A device for drainage of hepatic cysts under ultrasound guidance and internal circulation comprises a drainage device, which is made of a material that can be absorbed by the human body; the drainage device comprises a drainage part and a pair of limiting parts fixedly connected to the two ends of the drainage part, and the drainage part and the limiting parts are internally communicated; the drainage part is confined inside the cyst by the limiting parts, and the liquid in the cyst is drained into the drainage part through one of the limiting parts, so that the liquid flows out from the other limiting part to the abdominal cavity, thereby realizing internal drainage.

[0005] Preferably, the drainage portion and the limiting portion are respectively a flexible guide tube and a limiting bag, the diameter of the limiting bag is larger than the diameter of the guide tube, and the limiting bag is confined in the cyst by a transition connection surface between the guide tube and the limiting bag; a plurality of through holes for drainage are provided along the side of the limiting bag away from the guide tube.

[0006] Preferably, a plurality of one-way valves are fixedly connected to the inner wall of either end of the guide tube, and the plurality of one-way valves form a container to receive the liquid from the limiting bag. As the liquid pressure increases, the bottom of the one-way valve moves toward the inner wall of the guide tube, the container is opened, the liquid flows out, the pressure is reduced, and the plurality of one-way valves reform into a container.

[0007] Preferably, the drainage portion and the limiting portion are a tube body and a tube head respectively; the cross-section of the tube head is triangular, and a pair of tube heads are symmetrical along the axis of the guide tube; a part of the tube head is smoothly connected to the tube body, and the other part protrudes from the outer wall of the tube body, so that the tube head can be confined in the cyst.

[0008] Preferably, the drainage portion and the limiting portion are a flexible belt surface and a belt head respectively, the end of the belt head away from the belt surface is conical, the belt surface is fixedly connected to the outer wall of the belt head, and is fan-shaped at the connection, so that the belt head can be confined in the cyst, and the liquid in the cyst can be drained to the outside of the cyst through the fan-shaped belt surface.

[0009] Preferably, a launching device is installed outside the drainage device to fire the drainage device; the launching device includes a launching tube and a limiting structure that are fixedly connected, and the launching tube and the limiting structure are communicated at the end near the liver; the launching tube is equipped with one of the belt heads, and the belt surface and the other belt head are placed in the limiting structure, and a fastening structure is installed in the middle of the limiting structure for pressing the belt surface.

[0010] Preferably, the limiting structure includes a rotating tube, a tube sleeve assembly and a fixed tube. The rotating tube can rotate and move axially in the tube sleeve assembly. The fixed tube is threadedly connected to the outer wall of the tube sleeve assembly and can be threadedly connected to the end of the rotating tube away from the liver through rotation of the fixed tube.

[0011] Preferably, the length of the rotating tube is greater than that of the tube sleeve assembly; the tube sleeve assembly is slidably connected to a fastening rod, which is inserted into the rotating tube to drive the fastening rod to slide; the fastening rod is fixedly connected to a fastening ball, which is pressed on the tube sleeve assembly and the outer wall of the launch tube to limit the position of the rotating tube.

[0012] Preferably, the fastening structure includes a protective shell, a rotating assembly, a clamping block and a fixed block, one end of the rotating assembly is fixedly connected to the end of the rotating tube, and the other end is rotatably connected to the fixed block and meshingly connected to the clamping block on the lower side, and the clamping block can slide in the telescopic groove opened in the fixed block; the protective shell matches the rotating assembly and is fixedly connected to the rotating tube and the fixed block.

[0013] A method for using an ultrasound-guided hepatic cyst drainage internal circulation device comprises the following steps: S1. Positioning: Use ultrasound to locate the location of the liver cyst and determine the location of the opening in the abdomen; S2, configuring a drainage device, selecting a drainage device suitable for the volume of the liver cyst located in step S1, and placing at least one drainage device into the cavity of the launch device; S3, opening a hole, performing puncture and opening a hole at the opening position of the abdomen determined in step S1; S4, after step S3, a drainage device with a tube head or a head is loaded into the drainage device, and under ultrasound guidance, a transmitting device is passed through the abdominal cavity to the liver, and then the drainage device is fired so that the limiting part penetrates the liver and enters the liver cyst; S5. After step S3, a drainage device with a guide tube is placed into the liver cyst.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The present invention has a simple structure. For cyst fluid that can be absorbed by the body, the fluid in the cyst can be drained into the abdominal cavity through the drainage device, forming a circulation drainage mode in the body. It is not necessary to insert a catheter all the time during the drainage process. Since the drainage device is placed in the abdominal cavity, continuous drainage can be performed, the drainage method is optimized, the restrictions on the patient's activities are reduced, the drainage is more targeted, and the discomfort of the patient during drainage is reduced. The drainage device is made of a material that can be absorbed by the human body, so it does not need to be removed and will not cause secondary damage to the body; and the drainage device has a simple structure and is easy to manufacture, which can reduce the economic burden on patients; The drainage device has various structural shapes, and a suitable structural shape can be selected according to the specific size of the cyst to improve the drainage effect; the transition surface connecting the limiting part and the drainage part can prevent the limiting part from falling off from the cyst, thereby ensuring safety during drainage.

[0015] The launching device is used in conjunction with the drainage device. With the help of the impact force generated by the launching device, the drainage device is launched into the liver cyst. The belt surface is compressed by the fastening structure to prevent the belt head from penetrating the cyst and inserting into the normal liver behind the cyst to cause additional damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the drainage portion of the present invention being in the shape of a guide tube; Figure 2 It is a cross-sectional view of the one-way valve of the present invention; Figure 3 This is a schematic diagram of the structure of the drainage portion of the present invention being in a planar shape; Figure 4 This is a schematic diagram of the structure of the drainage part of the present invention being in the shape of a tube body; Figure 5 It is a schematic diagram of the structure of the launch device of the present invention; Figure 6 It is a cross-sectional view of the position limiting pipe of the present invention; Figure 7 This is a disassembled diagram of the structure of the present invention; Figure 8 This is a structural disassembly diagram of the fastening device of the present invention; Fig. 9This is a disassembled diagram of the structure of the meshing pipe of the present invention; Fig.10 It is a schematic diagram of the structure of the connection between the limiting tube and the transmitting tube of the present invention; Fig.11 This is a structural cross-sectional view of the launch device of the present invention when the belt surface and the belt head are placed.

[0017] In the figure: 1 drainage device, 11 drainage part, 111 guide tube, 112 tube body, 113 belt surface, 12 limiting part, 121 limiting bag, 1211 one-way valve, 1212 drainage ring, 122 tube head, 123 belt head, 21 launching tube, 22 limiting structure, 221 rotating tube, 222 supporting tube one, 223 tube sleeve, 224 fixed tube, 225 tube handle, supporting tube two 333, 31 fastening structure, 311 protective shell, 312 meshing tube, 313 meshing shaft, 314 pressing block, 315 fixed block, 41 fastening rod, 411 rotating assembly, 42 fastening ball, 51 tube sleeve assembly, 511 sliding rod, 512 threaded tube, 9 launching device. DETAILED DESCRIPTION

[0018] Embodiment 1:

[0019] See also Figure 1-4 The present invention provides a technical solution: an ultrasound-guided liver cyst drainage internal circulation device; comprising a drainage device 1, the drainage device 1 is made of a material that can be absorbed by the human body; the drainage device 1 comprises a drainage portion 11 and a pair of limiting portions 12 fixedly connected to both ends of the drainage portion 11, and the drainage portion 11 and the limiting portions 12 are internally communicated; the drainage portion 11 is limited inside the cyst by the limiting portions 12, and the liquid in the cyst is drained into the drainage portion 11 through one of the limiting portions 12, so that the liquid flows out from the other limiting portion 12 to the abdominal cavity, thereby realizing in vivo drainage (the liquid in this article refers to the liquid in the liver cyst); The drainage portion 11 and the limiting portion 12 have various specific shapes; Figure 1-2 As shown, the drainage portion 11 and the limiting portion 12 can be a flexible guide tube 111 and a limiting capsule 121, respectively. The diameter of the limiting capsule 121 is larger than the diameter of the guide tube 111. The limiting capsule 121 is limited in the cyst through the transition connection surface between the guide tube 111 and the limiting capsule 121. A plurality of through holes for drainage are provided along the side of the limiting capsule 121 away from the guide tube 111. A plurality of one-way valves 1211 are fixedly connected to the inner wall of either end of the guide tube 111, and the limiting capsule 121 near the one-way valve 1211 is used to be inserted into the liver cyst; the one-way valve 1211 is bent into a U-shape with the opening facing downward near the connection of the guide tube 111, and the thickness of the turning point of the U-shape is smaller than that of the two sides, so as to reduce the pressure that the one-way valve 1211 can withstand. When the pressure is too large, the bottom of the one-way valve will be pressed to move toward the inner wall of the guide tube 111. The plurality of one-way valves 1211 form a container to receive the liquid from the limiting capsule 121. The liquid in the cyst flows to the bottom of the container through the through hole and the limiting capsule 121. As the liquid pressure increases, the bottom of the one-way valve 1211 moves toward the inner wall of the guide tube 111, the container is opened, and the liquid flows out to the abdominal cavity and is absorbed by the greater omentum in the abdominal cavity. Then the pressure is reduced, and the plurality of one-way valves 1211 re-form a container; excessive accumulation of liquid in the cyst and compression of other organs by the enlarged cyst can be avoided; A drainage ring 1212 is provided in the limiting bag 121 near the one-way valve 1211. One end of the drainage ring 1212 is fixedly connected to the inner wall of the limiting bag 121, and the other end faces the container composed of multiple one-way valves 1211. The diameter of the other end is smaller than the maximum diameter of the container, so as to prevent liquid from accumulating in the groove formed at the connection between the one-way valve 1211 and the guide tube 111.

[0020] like Figure 4 As shown, the drainage portion 11 and the limiting portion 12 can also be a tube body 112 and a tube head 122 respectively; the cross section of the tube head 122 is triangular, and a pair of tube heads 122 are symmetrical along the axis of the drainage tube 112; a part of the tube head 122 is smoothly connected to the tube body 112, and the other part protrudes from the outer wall of the tube body 112, so that the tube head 122 can be confined in the cyst, and the liquid in the cyst can flow into the abdominal cavity through the tube head 122 and the tube body 112, and be absorbed by the greater omentum; like Figure 3 As shown, the drainage portion 11 and the limiting portion 12 can also be a flexible belt surface 113 and a belt head 123 respectively, the end of the belt head 123 away from the belt surface 113 is conical, the belt surface 113 is fixedly connected to the outer wall of the belt head 123, and is fan-shaped at the connection, so that the belt head 123 can be confined in the cyst, and the liquid in the cyst is drained to the outside of the cyst through the fan-shaped belt surface 113; the end of the belt head 123 can also be conical, and the sharp end helps to penetrate the liver and enter the liver cyst; the structure of the belt surface 113 can be a woven structure or other structure, which is conducive to the drainage of the liquid, and finally the liquid in the liver cyst is drained to the abdominal cavity through the belt surface 113 and absorbed by the greater omentum.

[0021] A method for using an ultrasound-guided hepatic cyst drainage internal circulation device comprises the following steps: S1. Positioning: Use ultrasound to locate the location of the liver cyst and determine the location of the opening in the abdomen; S2, configuring the drainage device 1, selecting a drainage device 1 suitable for the volume of the liver cyst located in step S1, and placing at least one drainage device 1 into the cavity of the launch device 9; S3, opening a hole, performing puncture and opening a hole at the opening position of the abdomen determined in step S1; S4, after step S3, the drainage device 1 with the tube head 122 or the head 123 is loaded into the drainage device 1, and under ultrasound guidance, the transmitting device 9 is passed through the abdominal cavity to the liver, and then the drainage device 1 is fired, so that the limiting part 12 penetrates the liver and enters the liver cyst; S5. After step S3, the drainage device 1 with the guide tube 111 is placed into the liver cyst.

[0022] Embodiment 2:

[0023] Please refer to Figure 3 and Figures 5 to 11 , based on Example 1, Figure 3 , Figure 5 and Fig.11 As shown, in order to cooperate with the use of the drainage device 1, a launching device 9 is also provided for firing the drainage device 1. The launching device 9 includes a launching tube 21 and a limiting structure 22 that are fixedly connected. One end of the launching tube 21 is used to be fixedly connected to a launching handle (not shown in the figure, it is an existing device), and the drainage device 1 in the launching tube 21 is fired out through the launching handle; the other end of the launching tube 21 is flush with the limiting structure 22, serving as a launching port, and the two are connected at the launching port, and the connecting portion is correspondingly convex in an arc shape; the launching tube 21 is used One of the belt heads 123 is installed, and the belt surface 113 and the other belt head 123 are placed in the limiting structure 22. A fastening structure 31 is installed in the middle of the limiting structure 22 to press the belt surface 113 tightly to prevent the belt head in the launch tube 21 from driving the entire belt surface 113 out during launch, causing the belt head 123 to pass through the liver cyst from the front and then pass out from the back of the liver cyst and insert into the normal liver behind the liver cyst, causing additional damage to the liver, and the fluid in the liver overflows to irritate and pollute the liver behind the liver cyst; Specifically, Figure 6-7 As shown, the limiting structure 22 includes a rotating tube 221, a tube sleeve assembly 51, a fixed tube 224 and a tube handle 225, and the tube sleeve assembly 51 includes a supporting tube 222 and a tube sleeve 223; One end of the rotating tube 221 is used to connect to the fastening structure 31, and the other end is slidably connected to the tube handle 225. The outer wall of the rotating tube 221 near 31 is fixedly connected to the support tube 1 222, and the outer wall of the support tube 1 222 fits with the tube sleeve 223, so that the rotating tube 221 can drive the support tube 1 222 to rotate in the tube sleeve 223 and move along the axial direction of the rotating tube 221; the limiting structure 22 also includes a support tube 233, which is far away from 31 and fixedly connected to the tube sleeve 223, and supports the rotating tube 221 together with the support tube 1 222; the length of the rotating tube 221 is greater than the tube sleeve 223, and extends to the left beyond the tube sleeve 223 (see Figure 6 ), the left end of the pipe sleeve 223 is threadedly connected to the fixed pipe 224, and the left end of the rotating pipe 221 is fixedly connected to the pipe handle 225. By rotating the pipe handle 225, the rotating pipe 221 can be driven to rotate, and by rotating the fixed pipe 224, the fixed pipe 224 can be moved to the left and meshed with the pipe handle 5, thereby fixing the pipe handle 225 to prevent the pipe handle 225 from rotating by itself; similarly, reverse rotation cancels the fixation; The fixed tube 224 includes multiple sliding rods 511 and two threaded tubes 512 of different lengths. One end of the sliding rod 511 is fixedly connected to the end of one of the threaded tubes 512, and the other end passes through the other threaded tube 512 and further extends, so that one of the threaded tubes 512 is not threadedly connected to the pipe sleeve 223 and can move axially along the sliding rod 512, leaving one threaded tube 512 threadedly connected to the pipe sleeve 223.

[0024] like Figure 7-10 As shown, the fastening structure 31 is located inside the support tube 222, and the fastening structure 31 includes a protective shell 311, a rotating assembly 411, a pressing block 314 and a fixed block 315. The rotating assembly 411 includes a meshing tube 312 and a meshing shaft 313; one end of the meshing tube 312 is fixedly connected to the end of the rotating rod 221, and the inner wall of the other end is meshed with the meshing shaft 313. The meshing shaft 313 is meshed with the pressing block 314 on the lower side and is rotatably connected to the left side of the fixed block 315 (see Figure 8 ), a telescopic groove matching the pressing block 314 is opened in the middle of the fixed block 315, and the pressing block 314 can slide in the telescopic groove. The end of the pressing block 314 away from the fixed block 315 is arc-shaped, which is adapted to the curvature of the inner wall of the support tube 222 and is used to compress the belt surface 113; the protective shell 311 is used to fill the gap between the meshing tube 312 and the fixed block 315 to prevent the belt surface 113 from being entangled therein, and is fixedly connected to the rotating rod 221 and the fixed block 315. The diameter of the fixed block 315 and the protective shell 311 is the same as that of the rotating rod 221 (see Figure 7 ); When the belt surface 113 is placed, the rotating tube 221 rotates to drive the meshing tube 312 to rotate, and drives the meshing shaft 313 to rotate, so that the pressing block 314 rotates toward the belt surface 113 until it is pressed tightly, and then as described in the above-mentioned use of the limiting structure 22, the rotating fixing tube 224 fixes the tube handle 225 to ensure that the belt surface 113 is always in a pressed state; like Figure 5 and Figure 7 As shown, the sleeve 223 is provided with a strip groove, and a fastening rod 41 is provided in the strip groove. The fastening rod 41 is inserted into the rotating rod 221, and the fastening rod 41 is slid to the left, which can drive the rotating rod 221 and the fastening structure 41 to slide to the left, and the excess belt surface 113 is slid into the sleeve 223; then the fastening rod 41 is rotated so that the fastening ball 42 on the fastening rod 41 is pressed on the sleeve 223 and the outer wall of the launch tube 21 (see Figure 5 ), to avoid movement; when in use, the fastening rod 41 is located outside the body and will not enter the body.

[0025] Working principle: Taking the example of launching two belt heads 123 into a liver cyst, first, the fastening device 31 is moved to the end of the launch port, the operator determines the length of the launched belt surface 113, and then places the remaining belt surface 113 and the belt head 123 in the tube sleeve 223 for fixing. At this time, the determined length of the belt surface 113 is leaked outside the tube sleeve 223, and then the tube handle is rotated to drive the rotating tube 221 to rotate, the rotating tube 221 drives the meshing tube 312 to rotate, the meshing tube 312 drives the meshing shaft 313 to rotate, and the meshing shaft 313 drives the pressing block 314 to move toward the belt surface 112 until the belt surface 113 is pressed tightly, and then one of the threaded tubes 512 is slid close to the tube handle 225 and threadedly connected with the tube handle 225 to prevent the rotating rod 221 from rotating, resulting in loosening of the pressing of the belt surface 113; Then, the other belt heads 123 are placed in the cavity of the launch tube 21 in sequence, and then the rotating tube 221 is moved away from the launch port by the tube handle 225 or the fastening rod 41. At this time, the tube handle 225 drives the sliding rod 511 to move accordingly, so that the belt surface 113 leaking outside the tube sleeve 223 is placed inside the tube sleeve 223, and then the fastening rod 41 is rotated to make the fastening ball 42 press the outer wall surface of the tube sleeve 223 and the launch tube 21 to prevent the rotating tube 221 from moving; When placing the remaining belt surface 113 and belt head 123 in the tube sleeve 223, the belt surface 113 is placed against the inner wall of the tube sleeve 223, and the length of the launched belt surface 113 is gradually reduced from the length of the belt surface 113 that is in contact with the tube sleeve 223 to the outside, and the belt head that is in contact with the inner wall of the tube sleeve 223 is first placed in the launch tube 21, and the rest are placed in sequence; after placing the belt surface 113 that is leaking outside the tube sleeve 223 in the tube sleeve 223, the belt surface 113 is first straightened, and then the rotating tube 221 is moved in the opposite direction toward the launch port, and a certain active length is reserved for the belt surface 113, so that the reserved length of the belt surface 113 is gradually reduced from the length of the belt surface 113 that is in contact with the inner wall of the tube sleeve 223 to the outside, so that the belt head 123 can be placed in the launch tube 21 in sequence; The connecting part between the launch tube 21 and the launch port of the sleeve 223 is correspondingly convex in an arc shape, which can have a certain limiting effect on the belt surface 113 to prevent the outermost belt head 123 from slipping out of the launch tube 21; Finally, the device is inserted into a predetermined position in the body, and the outermost lead 123 is launched through the launcher, and then another lead 123 is launched immediately. Since the lead 123 has a certain movable length, the launch tube 21 can have a certain moving distance, and the compression of the belt surface 113 can be cancelled without pulling the lead 123 inside the liver cyst, which is safer.

[0026] Embodiment 3:

[0027] On the basis of Example 2, Figure 4 The drainage device 1 can be directly placed in the cavity of the launch tube 21 and launched into the liver cyst.

Claims

1. An ultrasound-guided hepatic cyst drainage internal circulation device, Features: The drainage device (1) comprises a drainage portion (1), wherein the drainage device (1) is made of a material that can be absorbed by the human body; the drainage device (1) comprises a drainage portion (11) and a pair of limiting portions (12) fixedly connected to both ends of the drainage portion (11), wherein the drainage portion (11) and the limiting portions (12) are internally communicated with each other; the drainage portion (11) is limited inside the cyst by the limiting portions (12), and liquid in the cyst is drained into the drainage portion (11) by one of the limiting portions (12), so that the liquid flows out from the other limiting portion (12) to the abdominal cavity, thereby achieving internal drainage.

2. The ultrasound-guided hepatic cyst drainage internal circulation device according to claim 1, Features: The drainage portion (11) and the limiting portion (12) are respectively a flexible guide tube (111) and a limiting capsule (121); the diameter of the limiting capsule (121) is larger than the diameter of the guide tube (111); the limiting capsule (121) is limited within the cyst via a transition connection surface between the guide tube (111) and the limiting capsule (121); and a plurality of through holes for drainage are provided along a side of the limiting capsule (121) away from the guide tube (111).

3. The ultrasound-guided hepatic cyst drainage internal circulation device according to claim 2, Features: A plurality of one-way flaps (1211) are fixedly connected to the inner wall of either end of the guide tube (111), and the plurality of one-way flaps (1211) form a container to receive liquid from the limiting bag (121). As the liquid pressure increases, the bottom of the one-way flap (1211) moves toward the inner wall of the guide tube (111), the container is opened, the liquid flows out, the pressure decreases, and the plurality of one-way flaps (1211) re-form a container.

4. The ultrasound-guided hepatic cyst drainage internal circulation device according to claim 1, Features: The drainage portion (11) and the limiting portion (12) are respectively a tube body (112) and a tube head (122); the tube head (122) has a triangular cross section, and a pair of tube heads (122) are symmetrical along the axis of the drainage tube (112); a portion of the tube head (122) is smoothly connected to the tube body (112), and another portion protrudes from the outer wall of the tube body (112), so that the tube head (122) can be confined within the cyst.

5. The ultrasound-guided hepatic cyst drainage internal circulation device according to claim 1, Features: The drainage portion (11) and the limiting portion (12) are respectively a flexible belt surface (113) and a belt head (123); the end of the belt head (123) away from the belt surface (113) is conical; the belt surface (113) is fixedly connected to the outer wall of the belt head (123) and is fan-shaped at the connection, so that the belt head (123) can be confined in the cyst, and the liquid in the cyst is drained to the outside of the cyst through the fan-shaped belt surface (113).

6. The ultrasound-guided hepatic cyst drainage internal circulation device according to claim 1 or 5, Features: A launching device (9) is installed outside the drainage device (1) to fire the drainage device (1); the launching device (9) comprises a launching tube (21) and a limiting structure (22) which are fixedly connected, and the launching tube (21) and the limiting structure (22) are connected at the ends close to the liver; the launching tube (21) is equipped with one of the belt heads (123), the belt surface (113) and the other belt head (123) are placed in the limiting structure (22), and a fastening structure (31) is installed in the middle of the limiting structure (22) for pressing the belt surface (113).

7. The ultrasound-guided hepatic cyst drainage internal circulation device according to claim 6, Features: The limiting structure (22) comprises a rotating tube (221), a tube sleeve assembly (51) and a fixed tube (224); the rotating tube (221) is capable of rotating and axially moving within the tube sleeve assembly (51); the fixed tube (224) is threadedly connected to the outer wall of the tube sleeve assembly (51); and through the rotation of the fixed tube (224), the fixed tube (224) can be threadedly connected to the end of the rotating tube (221) away from the liver.

8. The ultrasound-guided hepatic cyst drainage internal circulation device according to claim 7, Features: The length of the rotating tube (221) is greater than that of the tube sleeve assembly (51); the tube sleeve assembly (51) is slidably connected to a fastening rod (41), which is inserted into the rotating tube (221) to drive the fastening rod (41) to slide; the fastening rod (41) is fixedly connected to a fastening ball (42), which is pressed against the tube sleeve assembly (51) and the outer wall of the launch tube (21) to limit the position of the rotating tube (221).

9. The ultrasound-guided hepatic cyst drainage internal circulation device according to claim 7, Features: The fastening structure (31) comprises a protective shell (311), a rotating assembly (411), a pressing block (314) and a fixed block (315); one end of the rotating assembly (411) is fixedly connected to the end of the rotating tube (221), and the other end is rotatably connected to the fixed block (315) and meshedly connected to the pressing block (314) at the lower side; the pressing block (314) is capable of sliding in a telescopic groove provided in the fixed block (315); the protective shell (311) matches the rotating assembly (411) and is fixedly connected to the rotating tube (221) and the fixed block (315).

10. A method for using an ultrasound-guided hepatic cyst drainage internal circulation device. Features: The method is based on the hepatic cyst drainage internal circulation device according to any one of claims 1 to 9, and comprises the following steps: S1. Positioning: Use ultrasound to locate the location of the liver cyst and determine the location of the opening in the abdomen; S2, configuring a drainage device (1), selecting a drainage device (1) suitable for the volume of the liver cyst located in step S1, and placing at least one drainage device (1) into the cavity of the launch device (9); S3, opening a hole, performing puncture and opening a hole at the opening position of the abdomen determined in step S1; S4. After step S3, the drainage device (1) having the tube head (122) or the head (123) is loaded into the drainage device (1), and under ultrasound guidance, the transmitting device (9) is passed through the abdominal cavity to the liver, and then the drainage device (1) is fired so that the limiting portion (12) penetrates the liver and enters the liver cyst; S5. After step S3, a drainage device (1) with a guide tube (111) is placed into the liver cyst.

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