Subperitoneal hepatic vein blood flow blocking device

Abstract

The invention relates to the technical field of medical treatment, and discloses an intraperitoneal hepatic vein blood flow blocking device which comprises a drainage tension-brace mechanism, a hepatic vein blocking mechanism is arranged on the surface of the drainage tension-brace mechanism, a catheter recycling mechanism is arranged on the surface of the hepatic vein blocking mechanism, a hydraulic measuring mechanism is arranged at one end of the catheter recycling mechanism, and the hydraulic measuring mechanism is connected with the drainage tension-brace mechanism. And a normal saline injection mechanism is arranged at one end of the hydraulic measuring mechanism. According to the intraperitoneal hepatic vein blood flow blocking device, through the arrangement of the drainage pulling and supporting mechanism, the hepatic vein blocking mechanism, the catheter recycling mechanism, the hydraulic measuring mechanism and the normal saline pushing and injecting mechanism, the hepatic vein can be directly blocked through expansion of the hepatic vein blocking mechanism in the using process, and meanwhile it is guaranteed that the inferior vena cava blood flow can flow through a circulation cavity; therefore, smooth return blood circulation of the inferior vena cava is guaranteed.

Description

Technical Field

[0001] The present invention relates to the field of medical technology, and specifically to a sub-abdominal hepatic vein blood flow blocking device. Background Art

[0002] Laparoscopic hepatectomy is a minimally invasive surgery. By making several small incisions in the abdomen and inserting a laparoscope and other surgical tools, a part of the liver is removed. This surgical method has the advantages of less trauma, faster recovery, and fewer complications compared with traditional open surgery.

[0003] During laparoscopic liver resection surgery, bleeding is the greatest risk, which can lead to catastrophic consequences in severe cases and is also one of the most important reasons for converting laparoscopic liver resection to open surgery. Due to the application of the first porta hepatis blocking technique, bleeding from the hepatic vein system has become the most important bleeding cause in laparoscopic liver resection surgery. However, in laparoscopic hepatectomy, the hepatic artery and portal vein are usually blocked to control bleeding, and the hepatic vein is rarely blocked, which makes it difficult to keep the inferior vena cava blood flow unobstructed during the operation and greatly affects the inferior vena cava blood return to the heart. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the present invention provides a sub-abdominal hepatic vein blood flow blocking device, which solves the problems mentioned in the above background.

[0005] The present invention provides the following technical solution: A sub-abdominal hepatic vein blood flow blocking device, comprising: a liquid guiding and stretching mechanism, on the surface of which a hepatic vein blocking mechanism is arranged, on the surface of which a catheter recycling mechanism is arranged, at one end of which a hydraulic measurement mechanism is arranged, and at one end of which a normal saline injection mechanism is arranged.

[0006] Preferably, the liquid guiding and stretching mechanism includes a main liquid guiding pull tube, a liquid guiding end pull tube, liquid guiding discharge holes, a first imaging ring, a docking head, and a first sealing ring. The liquid guiding end pull tube is integrally arranged at the inner end of the main liquid guiding pull tube, the surface of the main liquid guiding pull tube is a rough surface, and the surface of the liquid guiding end pull tube is a smooth surface. The liquid guiding discharge holes are penetrated and opened on the surface of the liquid guiding end pull tube. The first imaging ring is fixedly sleeved on the surface of the liquid guiding end pull tube. The docking head is fixedly connected to the end of the main liquid guiding pull tube away from the liquid guiding end pull tube, and the first sealing ring is fixedly connected to the inner wall of the docking head.

[0007] Preferably, the hepatic vein blocking mechanism includes an outer pull tube, a reed connecting sleeve, a support reed, a reed end joint, a second developing ring, and a sliding seal ring. The outer pull tube is movably sleeved on the surface of the main liquid guiding pull tube. The reed connecting sleeve is fixedly sleeved at the inner end of the outer pull tube. The support reed is integrally arranged at one end of the reed connecting sleeve, and the number of support reeds is multiple. The multiple support reeds are centrosymmetric with the central axis of the reed connecting sleeve as the symmetry axis. The reed end joint is integrally arranged at one end of the multiple support reeds away from the reed connecting sleeve, and the elastic tendency of the multiple support reeds is towards the outside.

[0008] Preferably, the hepatic vein blocking mechanism further includes a fixed locking cylinder, a threaded seat, a guiding hole, a threaded cylinder, a movable locking cylinder, a rubber locking bladder, and a guiding post. The fixed locking cylinder is fixedly connected to one end of the outer pull tube. The threaded seat is integrally arranged on the surface of one end of the fixed locking cylinder. The guiding hole is penetrated and opened on the surface of the threaded seat. The threaded cylinder is threadedly connected to the surface of the threaded seat. The movable locking cylinder is rotatably connected to the inner wall of the threaded cylinder through a bearing. The rubber locking bladder is fixedly connected between the fixed locking cylinder and the movable locking cylinder. The guiding post is fixedly inserted into one end of the movable locking cylinder, and the surface of the guiding post is slidably connected to the inner wall of the guiding hole. The surface of the rubber locking bladder is movably connected to the surface of the main liquid guiding pull tube.

[0009] Preferably, the hepatic vein blocking mechanism further includes a blocking liquid bladder, a liquid guiding bladder channel, and a connecting bladder sleeve. The blocking liquid bladder is fixedly sleeved on the surface of the liquid guiding end pull tube. The liquid guiding bladder channel is integrally arranged inside the blocking liquid bladder and is communicated with the liquid guiding discharge hole. The connecting bladder sleeve is integrally arranged on the inner wall of the blocking liquid bladder. The blocking liquid bladder is fixedly connected to the support reed through the connecting bladder sleeve, and a circulation cavity is arranged inside the blocking liquid bladder.

[0010] Preferably, the catheter recycling mechanism includes an outer pull storage tube, a bladder storage tube, and a supporting guiding ring. The outer pull storage tube is movably sleeved on the surface of the outer pull tube. The bladder storage tube is integrally arranged at the inner end of the outer pull storage tube. The supporting guiding rings are respectively fixedly connected to one end of the bladder storage tube and one end of the outer pull storage tube.

[0011] Preferably, the hydraulic measurement mechanism includes a three-way joint, a switch valve, a threaded sleeve, a hydraulic catheter, and a hydraulic gauge. The three-way joint is threadedly connected to one end of the docking joint. The switch valve is fixedly installed at one end of the three-way joint. The threaded sleeve is fixedly connected to the input end of the switch valve. The hydraulic gauge is fixedly connected to one end of the three-way joint through the hydraulic catheter.

[0012] Preferably, the physiological saline injection mechanism includes an injection head, a second sealing ring, a transparent injection cylinder, a connecting cylinder, a threaded twisting cylinder, and a twisting sleeve. The injection head is threadedly connected inside the threaded sleeve. The second sealing ring is fixedly connected to one end of the injection head. The transparent injection cylinder is integrally provided at the input end of the injection head. The connecting cylinder is fixedly connected to one end of the transparent injection cylinder, and scale lines are provided on the surface of the transparent injection cylinder. The threaded twisting cylinder is rotatably connected to the inner wall of one end of the connecting cylinder through a bearing. The twisting sleeve is fixedly sleeved on the surface of the threaded twisting cylinder, and an injection internal thread is provided on the inner wall of the threaded twisting cylinder.

[0013] Preferably, the physiological saline injection mechanism further includes an injection piston, a piston joint, elastic threaded sheets, and a gripping block. The injection piston is slidably connected to the inner wall of the transparent injection cylinder. The piston joint is fixedly connected to one end of the piston. The number of elastic threaded sheets is two, and both elastic threaded sheets are integrally provided on one side of the piston joint. The gripping block is integrally provided on the surface of one end of the elastic threaded sheet, and intermittent external threads are provided on the surface of the elastic threaded sheet. The elastic threaded sheet is threadedly connected to the threaded twisting cylinder through the intermittent external threads and the injection internal thread.

[0014] Preferably, the physiological saline injection mechanism further includes a support ring, an anti-deviation guiding port, a shaft column, a limit stop block, and an unlocking handle. The support ring is fixedly connected to the inner wall of the connecting cylinder. The anti-deviation guiding port is penetrated and opened on the inner wall of the support ring, and the inner wall of the anti-deviation guiding port is slidably connected to the surface of the elastic threaded sheet. The shaft column is rotatably connected between the support ring and the connecting cylinder. The limit stop block and the unlocking handle are both fixedly connected to the surface of the shaft column, and the surface of the limit stop block is slidably connected to the inner wall of the elastic threaded sheet.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The hepatic vein blood flow blocking device under the peritoneum can directly block the hepatic vein by the expansion of the hepatic vein blocking mechanism during use through the provided liquid guiding and tensioning mechanism, hepatic vein blocking mechanism, catheter recovery mechanism, hydraulic measurement mechanism, and physiological saline injection mechanism, while ensuring that the blood flow in the inferior vena cava can flow through the circulation cavity, thereby ensuring the smooth return blood flow of the inferior vena cava.

[0016] The hepatic vein blood flow blocking device under the peritoneum can guide the labor-saving physiological saline for injection and extraction through the liquid guiding main tube, liquid guiding end tube, liquid guiding discharge holes, first imaging ring, docking head, and first sealing ring during use, and at the same time, it is convenient to control the opening and closing of the support spring piece by pulling the liquid guiding main tube.

[0017] The sub-abdominal hepatic vein blood flow blocking device, through the externally pulled tube, reed connection sleeve, support reed, reed end joint, second imaging ring, fixed locking cylinder, threaded seat, guide hole, threaded cylinder, movable locking cylinder, rubber locking bladder, guide post, blocking liquid bladder, liquid guide bladder channel, connecting bladder sleeve and sliding seal ring provided, can, when in use, realize the opening and closing control of the support reed through the dislocation cooperation between the externally pulled tube and the main liquid guide tube, and at the same time, can form a locking position between the externally pulled tube and the main liquid guide tube through the inflation of the rubber locking bladder, ensuring that the blocking liquid bladder and the support reed extend to the specified length.

[0018] The sub-abdominal hepatic vein blood flow blocking device, through the externally pulled storage tube, bladder storage tube and support guide ring provided, can, when in use, store the contracted blocking liquid bladder and support reed, ensuring that the device can be smoothly installed and recovered.

[0019] The sub-abdominal hepatic vein blood flow blocking device, through the three-way joint, switch valve, threaded sleeve, hydraulic catheter and hydraulic gauge provided, can, after the surface of the blocking liquid bladder is closely attached to the inferior vena cava, obtain the pressure change on the surface of the blocking liquid bladder through the hydraulic transmission of normal saline outside the body, thus avoiding damage to blood vessels due to excessive pressure.

[0020] The sub-abdominal hepatic vein blood flow blocking device, through the injection head, second sealing ring, transparent injection cylinder, connecting cylinder, threaded torsion cylinder, torsion sleeve, injection piston, piston joint, elastic threaded sheet, holding block, support ring, anti-deviation guide port, shaft column, limit stop block and unlocking handle provided, can, when in use, quickly draw liquid by pressing the elastic threaded sheet to ensure the liquid drawing efficiency, and slowly inject liquid by twisting the torsion sleeve during injection to ensure the liquid injection accuracy. Description of the Drawings

[0021] Figure 1 It is a schematic structural diagram of the present invention; Figure 2 It is a schematic structural diagram of the catheter recovery mechanism of the present invention; Figure 3 It is a schematic structural diagram of the liquid guide and support mechanism of the present invention; Figure 4 It is a schematic structural diagram at the position of the threaded cylinder of the present invention; Figure 5 It is a cross-sectional view at the position of the threaded cylinder of the present invention; Figure 6 It is an exploded structural diagram at the position of the threaded cylinder of the present invention; Figure 7 It is a schematic structural diagram at the position of the blocking liquid bladder of the present invention; Figure 8 It is a schematic structural diagram when the hepatic vein is blocked by the present invention; Figure 9 It is a cross-sectional view at the position of the blocking liquid bladder of the present invention; Figure 10Schematic diagram of the connection structure between the hydraulic measurement mechanism and the physiological saline injection mechanism of the present invention; Figure 11 Exploded structure schematic diagram of the hydraulic measurement mechanism of the present invention; Figure 12 Cross-sectional view of the physiological saline injection mechanism of the present invention; Figure 13 Schematic diagram of the structure at the position of the elastic threaded piece of the present invention; Figure 14 Schematic diagram of the structure at the position of the limit stop block of the present invention.

[0022] In the figure: 101, main liquid guiding pull tube; 102, liquid guiding end pull tube; 103, liquid guiding discharge hole; 104, first imaging ring; 105, docking head; 106, first sealing ring; 201, outer pull tube; 202, reed connecting sleeve; 203, supporting reed; 204, reed end joint; 205, second imaging ring; 206, fixed locking cylinder; 207, threaded seat; 208, guiding hole; 209, threaded cylinder; 210, moving locking cylinder; 211, rubber locking bladder; 212, guiding column; 213, blocking liquid bladder; 214, liquid guiding bladder channel; 215, connecting bladder sleeve; 216, sliding sealing ring; 301, outer pull storage tube; 302, bladder storage tube; 303, supporting guiding ring; 401, three-way joint; 402, switch valve; 403, threaded sleeve; 404, hydraulic conduit; 405, hydraulic pressure gauge; 501, injection head; 502, second sealing ring; 503, transparent injection cylinder; 504, connecting cylinder; 505, threaded twisting cylinder; 506, twisting sleeve; 507, injection piston; 508, piston joint; 509, elastic threaded piece; 510, holding block; 511, supporting ring; 512, anti-deviation guiding port; 513, shaft column; 514, limit stop block; 515, unlocking handle. Detailed implementation manners

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0024] Please refer to Figure 1-14, a hepatic vein blood flow occlusion device under the abdomen, comprising: a liquid guiding and stretching mechanism, a hepatic vein occlusion mechanism is arranged on the surface of the liquid guiding and stretching mechanism, a catheter recovery mechanism is arranged on the surface of the hepatic vein occlusion mechanism, a hydraulic measurement mechanism is arranged at one end of the catheter recovery mechanism, and a normal saline injection mechanism is arranged at one end of the hydraulic measurement mechanism. By arranging the liquid guiding and stretching mechanism, the hepatic vein occlusion mechanism, the catheter recovery mechanism, the hydraulic measurement mechanism and the normal saline injection mechanism, it is possible to directly occlude the hepatic vein by the expansion of the hepatic vein occlusion mechanism during use, and at the same time ensure that the blood flow of the inferior vena cava can flow through the flow cavity, thus ensuring the smooth return blood flow of the inferior vena cava.

[0025] Among them; the liquid guiding and stretching mechanism includes a liquid guiding main pull tube 101, a liquid guiding end pull tube 102, a liquid guiding discharge hole 103, a first imaging ring 104, a docking head 105 and a first sealing ring 106. The liquid guiding end pull tube 102 is integrally arranged at the inner end of the liquid guiding main pull tube 101, and the surface of the liquid guiding main pull tube 101 is a rough surface, and the surface of the liquid guiding end pull tube 102 is a smooth surface. The liquid guiding discharge hole 103 is penetrated and opened on the surface of the liquid guiding end pull tube 102. The first imaging ring 104 is fixedly sleeved on the surface of the liquid guiding end pull tube 102. The docking head 105 is fixedly connected to the end of the liquid guiding main pull tube 101 away from the liquid guiding end pull tube 102, and the first sealing ring 106 is fixedly connected to the inner wall of the docking head 105. By arranging the liquid guiding main pull tube 101, the liquid guiding end pull tube 102, the liquid guiding discharge hole 103, the first imaging ring 104, the docking head 105 and the first sealing ring 106, it is possible to guide the labor-saving normal saline for injection and extraction through the liquid guiding main pull tube 101 and the liquid guiding end pull tube 102 during use, and at the same time facilitate the control of the opening and closing of the support spring piece 203 by pulling the liquid guiding main pull tube 101.

[0026] Among them; the hepatic vein occlusion mechanism includes an outer pull tube 201, a spring piece connection sleeve 202, a support spring piece 203, a spring piece end joint 204, a second imaging ring 205 and a sliding sealing ring 216. The outer pull tube 201 is movably sleeved on the surface of the liquid guiding main pull tube 101. The spring piece connection sleeve 202 is fixedly sleeved at the inner end of the outer pull tube 201. The support spring piece 203 is integrally arranged at one end of the spring piece connection sleeve 202, and the number of the support spring pieces 203 is multiple, and the multiple support spring pieces 203 are centrosymmetric with the central axis of the spring piece connection sleeve 202 as the symmetry axis. The spring piece end joint 204 is integrally arranged at the end of the multiple support spring pieces 203 away from the spring piece connection sleeve 202, and the elastic tendency of the multiple support spring pieces 203 is all towards the outside.

[0027] Wherein, the hepatic vein blocking mechanism further includes a fixed locking cylinder 206, a threaded seat 207, a guiding hole 208, a threaded cylinder 209, a movable locking cylinder 210, a rubber locking bladder 211 and a guiding post 212. The fixed locking cylinder 206 is fixedly connected to one end of the outer pulling tube 201. The threaded seat 207 is integrally arranged on the surface of one end of the fixed locking cylinder 206. The guiding hole 208 is penetrated and opened on the surface of the threaded seat 207. The threaded cylinder 209 is threadedly connected to the surface of the threaded seat 207. The movable locking cylinder 210 is rotatably connected to the inner wall of the threaded cylinder 209 through a bearing. The rubber locking bladder 211 is fixedly connected between the fixed locking cylinder 206 and the movable locking cylinder 210. The guiding post 212 is fixedly inserted into one end of the movable locking cylinder 210, and the surface of the guiding post 212 is slidably connected to the inner wall of the guiding hole 208, and the surface of the rubber locking bladder 211 is movably connected to the surface of the main liquid guiding pulling tube 101.

[0028] Wherein, the hepatic vein blocking mechanism further includes a blocking liquid bladder 213, a liquid guiding bladder channel 214 and a connecting bladder sleeve 215. The blocking liquid bladder 213 is fixedly sleeved on the surface of the liquid guiding end pulling tube 102. The liquid guiding bladder channel 214 is integrally arranged inside the blocking liquid bladder 213, and the liquid guiding bladder channel 214 is communicated with the liquid guiding discharge hole 103. The connecting bladder sleeve 215 is integrally arranged on the inner wall of the blocking liquid bladder 213, and the blocking liquid bladder 213 is fixedly connected to the support spring piece 203 through the connecting bladder sleeve 215. And a circulation cavity is arranged inside the blocking liquid bladder 213. By providing the outer pulling tube 201, the spring piece connecting sleeve 202, the support spring piece 203, the spring piece end joint 204, the second developing ring 205, the fixed locking cylinder 206, the threaded seat 207, the guiding hole 208, the threaded cylinder 209, the movable locking cylinder 210, the rubber locking bladder 211, the guiding post 212, the blocking liquid bladder 213, the liquid guiding bladder channel 214, the connecting bladder sleeve 215 and the sliding sealing ring 216, when in use, the opening and closing control of the support spring piece 203 can be realized through the dislocation cooperation between the outer pulling tube 201 and the main liquid guiding pulling tube 101, and at the same time, the locking position between the outer pulling tube 201 and the main liquid guiding pulling tube 101 can be formed through the expansion of the rubber locking bladder 211, ensuring that the blocking liquid bladder 213 and the support spring piece 203 extend to the specified length.

[0029] Wherein, the catheter recycling mechanism includes an outer pulling storage tube 301, a bladder storage tube 302 and a supporting guiding ring 303. The outer pulling storage tube 301 is movably sleeved on the surface of the outer pulling tube 201. The bladder storage tube 302 is integrally arranged at the inner end of the outer pulling storage tube 301. The supporting guiding rings 303 are respectively fixedly connected to one end of the bladder storage tube 302 and one end of the outer pulling storage tube 301. By providing the outer pulling storage tube 301, the bladder storage tube 302 and the supporting guiding ring 303, the contracted blocking liquid bladder 213 and the support spring piece 203 can be stored during use, ensuring that the device can be installed and recycled smoothly.

[0030] Among them; the hydraulic measurement mechanism includes a three-way joint 401, a switching valve 402, a threaded sleeve 403, a hydraulic conduit 404, and a hydraulic pressure gauge 405. The three-way joint 401 is threadedly connected to one end of the docking joint 105. The switching valve 402 is fixedly installed at one end of the three-way joint 401. The threaded sleeve 403 is fixedly connected to the input end of the switching valve 402. The hydraulic pressure gauge 405 is fixedly connected to one end of the three-way joint 401 through the hydraulic conduit 404. By providing the three-way joint 401, the switching valve 402, the threaded sleeve 403, the hydraulic conduit 404, and the hydraulic pressure gauge 405, after blocking the close contact between the surface of the liquid sac 213 and the inferior vena cava, the pressure change on the surface of the blocked liquid sac 213 can be obtained outside the body through the hydraulic transmission of physiological saline, thereby avoiding damage to blood vessels due to excessive pressure.

[0031] Among them; the physiological saline injection mechanism includes an injection head 501, a second sealing ring 502, a transparent injection cylinder 503, a connecting cylinder 504, a threaded twisting cylinder 505, and a twisting sleeve 506. The injection head 501 is threadedly connected to the inside of the threaded sleeve 403. The second sealing ring 502 is fixedly connected to one end of the injection head 501. The transparent injection cylinder 503 is integrally provided at the input end of the injection head 501. The connecting cylinder 504 is fixedly connected to one end of the transparent injection cylinder 503, and scale lines are provided on the surface of the transparent injection cylinder 503. The threaded twisting cylinder 505 is rotatably connected to the inner wall of one end of the connecting cylinder 504 through a bearing. The twisting sleeve 506 is fixedly sleeved on the surface of the threaded twisting cylinder 505, and internal injection threads are provided on the inner wall of the threaded twisting cylinder 505.

[0032] Among them; the physiological saline injection mechanism further includes an injection piston 507, a piston joint 508, elastic threaded sheets 509, and a holding block 510. The injection piston 507 is slidably connected to the inner wall of the transparent injection cylinder 503. The piston joint 508 is fixedly connected to one end of the piston joint 508. The number of elastic threaded sheets 509 is two, and both of the two elastic threaded sheets 509 are integrally provided on one side of the piston joint 508. The holding block 510 is integrally provided on the surface of one end of the elastic threaded sheet 509, and intermittent external threads are provided on the surface of the elastic threaded sheet 509. The elastic threaded sheet 509 is threadedly connected to the threaded twisting cylinder 505 through the intermittent external threads and the internal injection threads.

[0033] Wherein, the physiological saline injection mechanism further includes a support ring 511, an anti-deviation guiding port 512, a shaft column 513, a limit stop 514 and an unlocking handle 515. The support ring 511 is fixedly connected to the inner wall of the connecting cylinder 504. The anti-deviation guiding port 512 is formed through the inner wall of the support ring 511, and the inner wall of the anti-deviation guiding port 512 is slidably connected to the surface of the elastic threaded piece 509. The shaft column 513 is rotatably connected between the support ring 511 and the connecting cylinder 504. The limit stop 514 and the unlocking handle 515 are both fixedly connected to the surface of the shaft column 513, and the surface of the limit stop 514 is slidably connected to the inner wall of the elastic threaded piece 509. By providing the injection head 501, the second sealing ring 502, the transparent injection cylinder 503, the connecting cylinder 504, the threaded twisting cylinder 505, the twisting sleeve 506, the injection piston 507, the piston joint 508, the elastic threaded piece 509, the holding block 510, the support ring 511, the anti-deviation guiding port 512, the shaft column 513, the limit stop 514 and the unlocking handle 515, it is possible to quickly draw liquid by pressing the elastic threaded piece 509 during use, ensuring the liquid drawing efficiency, and slowly inject the liquid by twisting the twisting sleeve 506 during injection, ensuring the liquid injection accuracy.

[0034] Working principle: Before use, the support spring piece 203 and the blocking liquid sac 213 are in a contracted state and are stored inside the sac storage tube 302. The main liquid guiding pull tube 101, the liquid guiding end pull tube 102 and the inside of the blocking liquid sac 213 are evacuated. The switch valve 402 is closed. The fixed locking cylinder 206 is away from the movable locking cylinder 210. The rubber locking sac 211 is stretched and its inner wall is separated from the surface of the main liquid guiding pull tube 101. During use, first draw the physiological saline into the transparent injection cylinder 503. When drawing, unfold the unlocking handle 515. When the unlocking handle 515 is unfolded, it drives the limit stop 514 to rotate through the shaft column 513, so that the limit stop 514 releases the limit block on the elastic threaded piece 509. Then pinch the holding block 510 to make the two elastic threaded pieces 509 approach each other, thus releasing the engagement with the threaded twisting cylinder 505. Then pull the holding block 510 to draw in the physiological saline. After drawing in a certain volume, release the holding block 510. The elasticity of the elastic threaded piece 509 forces it to rebound and reset to maintain its engagement with the threaded twisting cylinder 505. Then reset the unlocking handle 515, and the limit stop 514 rotates and resets, so that the limit stop 514 forms a limit block on the elastic threaded piece 509. After inserting the interventional outer tube into the patient's body, insert the outer pulling and receiving tube 301 along the interventional outer tube near the confluence of the inferior vena cava and the hepatic vein. Then push the outer pulling tube 201 to push out the supporting spring piece 203 and the blocking liquid sac 213, ensuring that the blocking liquid sac 213 is located at the confluence of the inferior vena cava and the hepatic vein. Then pull the main liquid guiding pulling tube 101 to make the supporting spring piece 203 push open the flow cavity of the blocking liquid sac 213 to ensure the blood flow of the inferior vena cava. Then twist the threaded cylinder 209 to make the fixed locking cylinder 206 approach the moving locking cylinder 210. The rubber locking sac 211 is pressed and folded inward to form a tight pressure on the main liquid guiding pulling tube 101, thus forming the positioning between the main liquid guiding pulling tube 101 and the outer pulling tube 201; Then connect the transparent syringe 503 containing normal saline to the syringe head 501 through the threaded sleeve 403. Then open the switch valve 402 and twist the twisting sleeve 506 to inject normal saline. When twisting, the twisting sleeve 506 drives the threaded twisting cylinder 505 to rotate. When the threaded twisting cylinder 505 rotates, it pushes the engaged elastic threaded piece 509 to move forward slowly, so that the injection piston 507 slowly injects the normal saline through the syringe head 501, the threaded sleeve 403, the three-way joint 401, the main liquid guiding pulling tube 101 and the liquid guiding end pulling tube 102 into the blocking liquid sac 213, so that the inside of the blocking liquid sac 213 is filled with normal saline and expands. Observe the numerical change of the hydraulic pressure gauge 405 during injection. After the blocking liquid sac 213 expands to closely adhere to the inferior vena cava, the blood flow of the hepatic vein is blocked, and the blood vessel forms a compression on the blocking liquid sac 213. The hydraulic pressure required for the blocking liquid sac 213 to expand also increases. At this time, observing the pressure change shown by the hydraulic pressure gauge 405, it can be known whether the blocking liquid sac 213 is closely adhered to the blood vessel wall. After the blocking liquid sac 213 is closely adhered, close the switch valve 402, remove the transparent syringe 503 and drain the remaining normal saline inside it; Then perform the surgical treatment. During the operation, the change of the hydraulic pressure gauge 405 should be monitored at any time to ensure that the leakage of the blocking liquid sac 213 can be detected in time; When removing the device, first open the switch valve 402, unfold the unlocking handle 515 to unlock the limit stop block 514 from limiting the elastic threaded piece 509. Then pinch the grasping block 510 to withdraw the normal saline. After withdrawing the normal saline, the blocking liquid sac 213 shrinks. Then close the switch valve 402 and disassemble the transparent syringe 503. Then twist the threaded cylinder 209 in the reverse direction to make the fixed locking cylinder 206 away from the moving locking cylinder 210. The rubber locking sac 211 is pulled and unfolded to release the tight pressure on the main liquid guiding pulling tube 101. Then push the main liquid guiding pulling tube 101 to fold and receive the supporting spring piece 203. Pull the outer pulling tube 201 and the main liquid guiding pulling tube 101 to retract the blocking liquid sac 213 into the inside of the sac receiving tube 302. Then withdraw the sac receiving tube 302 to recover the device.

[0035] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art will appreciate that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A subperitoneal hepatic vein blood flow blocking device, characterized in that: include: A fluid guiding and supporting mechanism, wherein a hepatic vein blocking mechanism is arranged on the surface of the fluid guiding and supporting mechanism, a catheter retrieval mechanism is arranged on the surface of the hepatic vein blocking mechanism, a hydraulic measuring mechanism is arranged at one end of the catheter retrieval mechanism, and a physiological saline pushing mechanism is arranged at one end of the hydraulic measuring mechanism.

2. The device for blocking blood flow of the inferior abdominal hepatic vein according to claim 1, characterized in that: The liquid guiding stretching mechanism comprises a liquid guiding main pull tube (101), a liquid guiding end pull tube (102), a liquid guiding discharge hole (103), a first developing ring (104), a butt joint (105) and a first sealing ring (106); the liquid guiding end pull tube (102) is integrally arranged at the inner end of the liquid guiding main pull tube (101); the surface of the liquid guiding main pull tube (101) is a rough surface, and the surface of the liquid guiding end pull tube (102) is a smooth surface; the liquid guiding discharge hole (103) is penetrated and opened on the surface of the liquid guiding end pull tube (102); the first developing ring (104) is fixedly sleeved on the surface of the liquid guiding end pull tube (102); the butt joint (105) is fixedly connected to an end of the liquid guiding main pull tube (101) away from the liquid guiding end pull tube (102); and the first sealing ring (106) is fixedly connected to the inner wall of the butt joint (105).

3. The device for blocking blood flow of the inferior abdominal hepatic vein according to claim 2, characterized in that: The hepatic vein blocking mechanism comprises an external pull tube (201), a reed connecting sleeve (202), a supporting reed (203), a reed end joint (204), a second developing ring (205) and a sliding sealing ring (216); the external pull tube (201) is movably sleeved on the surface of the main liquid guiding pull tube (101); the reed connecting sleeve (202) is fixedly sleeved on the inner end of the external pull tube (201); the supporting reed (203) is integrally arranged at one end of the reed connecting sleeve (202); the number of the supporting reeds (203) is multiple, and the multiple supporting reeds (203) are symmetrical with the central axis of the reed connecting sleeve (202) as the symmetry axis; the reed end joint (204) is integrally arranged at one end of the multiple supporting reeds (203) away from the reed connecting sleeve (202); and the elastic tendency of the multiple supporting reeds (203) is all toward the outside.

4. The device for blocking blood flow of the inferior abdominal hepatic vein according to claim 3, characterized in that: The hepatic vein blocking mechanism further comprises a fixed locking cylinder (206), a threaded seat (207), a guide hole (208), a threaded cylinder (209), a dynamic locking cylinder (210), a rubber locking bag (211) and a guide column (212); the fixed locking cylinder (206) is fixedly connected to one end of the external pull tube (201); the threaded seat (207) is integrally provided on the surface of one end of the fixed locking cylinder (206); the guide hole (208) penetrates through the surface of the threaded seat (207); the threaded cylinder (209) is threaded The thread is connected to the surface of the threaded seat (207), the dynamic locking cylinder (210) is rotatably connected to the inner wall of the threaded cylinder (209) through a bearing, the rubber locking bag (211) is fixedly connected between the fixed locking cylinder (206) and the dynamic locking cylinder (210), the guide column (212) is fixedly inserted at one end of the dynamic locking cylinder (210), and the surface of the guide column (212) is slidably connected to the inner wall of the guide hole (208), and the surface of the rubber locking bag (211) is movably connected to the surface of the liquid guide main pull tube (101).

5. The device for blocking blood flow of the inferior abdominal hepatic vein according to claim 4, characterized in that: The hepatic vein blocking mechanism further comprises a blocking liquid sac (213), a liquid-conducting sac channel (214) and a connecting sac sleeve (215); the blocking liquid sac (213) is fixedly sleeved on the surface of the liquid-conducting end pull tube (102); the liquid-conducting sac channel (214) is integrally arranged inside the blocking liquid sac (213), and the liquid-conducting sac channel (214) is connected to the liquid-conducting discharge hole (103); the connecting sac sleeve (215) is integrally arranged on the inner wall of the blocking liquid sac (213), and the blocking liquid sac (213) is fixedly connected to the supporting spring (203) via the connecting sac sleeve (215); and a flow cavity is arranged inside the blocking liquid sac (213).

6. The device for blocking blood flow of the inferior abdominal hepatic vein according to claim 5, characterized in that: The catheter recovery mechanism comprises an external pull-out storage tube (301), a sac storage tube (302) and a support guide ring (303); the external pull-out storage tube (301) is movably sleeved on the surface of the external pull-out tube (201); the sac storage tube (302) is integrally arranged at the inner end of the external pull-out storage tube (301); and the support guide ring (303) is respectively fixedly connected to one end of the sac storage tube (302) and one end of the external pull-out storage tube (301).

7. The device for blocking blood flow of the inferior abdominal hepatic vein according to claim 2, characterized in that: The hydraulic measuring mechanism comprises a three-way joint (401), a switch valve (402), a threaded sleeve (403), a hydraulic conduit (404) and a hydraulic gauge (405); the three-way joint (401) is threadedly connected to one end of the butt joint (105); the switch valve (402) is fixedly mounted on one end of the three-way joint (401); the threaded sleeve (403) is fixedly connected to the input end of the switch valve (402); and the hydraulic gauge (405) is fixedly connected to one end of the three-way joint (401) via the hydraulic conduit (404).

8. The device for blocking blood flow of the inferior abdominal hepatic vein according to claim 7, characterized in that: The physiological saline push injection mechanism comprises a push injection head (501), a second sealing ring (502), a transparent push injection cylinder (503), a connecting cylinder (504), a threaded twist cylinder (505) and a twist sleeve (506); the push injection head (501) is threadedly connected to the interior of the threaded sleeve (403); the second sealing ring (502) is fixedly connected to one end of the push injection head (501); the transparent push injection cylinder (503) is integrally arranged at the input end of the push injection head (501); the connecting cylinder (504) is fixedly connected to one end of the transparent push injection cylinder (503); and scale lines are provided on the surface of the transparent push injection cylinder (503); the threaded twist cylinder (505) is rotatably connected to the inner wall of one end of the connecting cylinder (504) via a bearing; the twist sleeve (506) is fixedly sleeved on the surface of the threaded twist cylinder (505); and the inner wall of the threaded twist cylinder (505) is provided with push internal threads.

9. The device for blocking blood flow of the inferior abdominal hepatic vein according to claim 8, characterized in that: The physiological saline push injection mechanism further comprises a push injection piston (507), a piston joint (508), an elastic threaded sheet (509) and a gripping block (510); the push injection piston (507) is slidably connected to the inner wall of the transparent push injection cylinder (503); the piston joint (508) is fixedly connected to one end of the piston joint (508); there are two elastic threaded sheets (509), and the two elastic threaded sheets (509) are integrally arranged on one side of the piston joint (508); the gripping block (510) is integrally arranged on the surface of one end of the elastic threaded sheet (509); the surface of the elastic threaded sheet (509) is provided with an intermittent external thread, and the elastic threaded sheet (509) is threadedly connected to the threaded twist cylinder (505) via the intermittent external thread and the push injection internal thread.

10. The device for blocking blood flow of the inferior abdominal hepatic vein according to claim 9, characterized in that: The physiological saline injection mechanism further comprises a support ring (511), an anti-deflection guide opening (512), a shaft column (513), a limit stopper (514) and an unlocking handle (515); the support ring (511) is fixedly connected to the inner wall of the connecting tube (504); the anti-deflection guide opening (512) is penetrated and opened in the inner wall of the support ring (511); the inner wall of the anti-deflection guide opening (512) is slidably connected to the surface of the elastic threaded sheet (509); the shaft column (513) is rotatably connected between the support ring (511) and the connecting tube (504); the limit stopper (514) and the unlocking handle (515) are both fixedly connected to the surface of the shaft column (513); and the surface of the limit stopper (514) is slidably connected to the inner wall of the elastic threaded sheet (509).

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