Porta hepatis occlusion device for precise occlusion during operation

Abstract

The invention relates to the technical field of medical instruments, in particular to an intraoperative accurate blocking hepatic portal blocking device which comprises an external shell, two positioning openings are formed in the lower end of the external shell, a binding ring is rotatably installed in the two positioning openings, a notch is formed in the binding ring, an internal cavity is formed in the binding ring, and the internal cavity is communicated with the external shell. An air bag ring is arranged in the built-in cavity, a driving device used for rotating the binding ring is arranged in the external shell, arc-shaped grooves are formed in the front end and the rear end of the external shell respectively, positioning rods located in the corresponding arc-shaped grooves are fixedly installed at the front end and the rear end of the binding ring respectively, and a pneumatic assembly is arranged at the upper end of the external shell. The hepatic portal tissue is completely extruded and blocked through the air bag ring, bleeding in an operation can be effectively reduced, the liver function can be protected, due to the fact that the air bag ring is adopted to extrude the hepatic portal tissue, the extrusion force can be effectively controlled, damage to the hepatic portal tissue is reduced, and operation is more convenient.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a hepatic hilum occlusion device for precise intraoperative occlusion. Background Technology

[0002] The liver is a primary metabolic organ in the body. Due to its rich blood supply, in hepatobiliary surgery, the hepatic hilum is often blocked (hepatic hilum occlusion) to reduce intraoperative bleeding and prevent oozing from the surgical wound and massive hemorrhage, which could endanger the patient's life. Hepatic hilum occlusion includes first, second, and third hepatic hilum occlusion. Clinically, first hepatic hilum occlusion is most commonly used. The first hepatic hilum mainly includes the hepatic artery, portal vein, and bile duct. The occlusion primarily blocks the hepatic artery and portal vein, significantly reducing blood flow into the liver. At this point, the blood within the liver mainly returns through the hepatic veins via the second hepatic hilum.

[0003] Currently, during surgery, the patient's hepatic hilum is usually bound with a band and clamped with surgical forceps. During the operation, it is usually necessary to loosen the band for a period of time every fifteen minutes or so to allow blood supply to the liver, and then continue to bind and block the band and perform the surgery. This method requires medical staff to pay close attention to the blocking time at all times, and the whole process requires frequent binding. It is difficult to control the binding force well, making the operation relatively troublesome and the blocking effect unsatisfactory.

[0004] Therefore, the present invention provides a hepatic hilum occlusion device for precise intraoperative occlusion to solve the above-mentioned problems. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art, the present invention provides a hepatic hilum occlusion device for precise intraoperative occlusion, which effectively solves the problems of difficulty in controlling the tying force when using bandages for frequent tying, which makes the operation more troublesome and the occlusion effect less than ideal.

[0006] Existing hepatic hilum occlusion devices are inconvenient to operate and have poor occlusion effects.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0008] A precise intraoperative hepatic hilum occlusion device includes an outer shell. Two positioning ports are provided at the lower end of the outer shell. A binding ring is rotatably mounted inside each of the two positioning ports. The binding ring has a notch and an internal cavity. An airbag ring is disposed inside the internal cavity. A driving device for rotating the binding ring is provided inside the outer shell. Arc-shaped grooves are provided at the front and rear ends of the outer shell. Positioning rods located inside the corresponding arc-shaped grooves are fixedly mounted at the front and rear ends of the binding ring. A pneumatic assembly is provided at the upper end of the outer shell.

[0009] Preferably, the driving device comprises a first gear and a second gear, the first gear is rotatably arranged inside the outer shell, the second gear is rotatably arranged on the side of the first gear inside the outer shell, the first gear and the second gear are arranged above the binding ring, the outer end of the binding ring is provided with a gear ring, and the first pulley set is arranged on the rear side of the outer shell between the first gear and the second gear.

[0010] Preferably, the first gear and the second gear are rotatably arranged inside the outer shell, the gas storage cabin is fixedly arranged on the front side of the first gear and the second gear inside the outer shell, and the elastic pipe is fixedly arranged on one side of the outer end of the binding ring and connected with the gas storage cabin.

[0011] Preferably, the top end of the outer shell is fixedly provided with a positioning disc, the top end of the positioning disc is fixedly provided with a rectangular box, the third gear is rotatably arranged inside the rectangular box, the second pulley set is connected between the first gear and the third gear, the rear end of the rectangular box is provided with a sliding hole, the driving rack meshing with the third gear is slidably arranged inside the rectangular box, and the driving block is fixedly arranged on the driving rack and located in the sliding hole.

[0012] Preferably, the sliding hole is provided with two fixed blocks fixedly arranged on the upper end and the lower end respectively, the precision screw rod is rotatably arranged between the two fixed blocks, the precision screw rod is threadedly arranged on the driving block, and the sliding hole is provided with a scale on one side.

[0013] Preferably, the pneumatic assembly comprises a lower end rod and an upper end rod, the lower end rod is fixedly arranged on the top end of the rectangular box, the upper end rod is threadedly arranged on the top end of the lower end rod, the upper end rod is fixedly provided with a gas storage cylinder inside, and the gas storage cylinder is fixedly provided with a gas conveying pipe at the lower end.

[0014] Preferably, the front end of the outer shell is provided with an observation port, the observation port is provided with a protective shell, the front end of the outer shell is provided with an inner port located below the observation port, two blocking rods are slidably arranged in the inner port, a pressing plate is fixedly arranged between the bottom ends of the two blocking rods, and a contraction spring is fixedly connected to the pressing plate.

[0015] Preferably, the upper end rod is provided with a bottom end plate and a top end plate located above the bottom end plate, the two ends of the bottom end plate are respectively fixedly provided with sliding shafts, a reset spring is sleeved on each sliding shaft, a compression air bag is sleeved on the upper end rod between the bottom end plate and the top end plate, a blocking block is arranged at the top end of the gas conveying pipe, an auxiliary block is fixedly arranged at the top end of the upper end rod, and an air pipe is connected between the blocking block and the compression air bag.

[0016] Preferably, a plurality of positioning holes are uniformly arranged on the upper end rod, a limiting ring is sleeved on the upper end rod, the limiting ring is fixedly connected with the bottom end plate, an inner hole is arranged in the limiting ring, a pressing spring is installed in the inner hole, and a positioning ball is fixedly installed on the pressing spring.

[0017] Preferably, the rectangular box is provided with a display screen and a prompt lamp.

[0018] Compared with the prior art, the present application has the following beneficial effects:

[0019] 1. The liver portal tissue is completely squeezed and blocked by the air bag ring, which can effectively reduce bleeding during surgery, make the surgical field clearer, reduce damage to liver tissue, and help protect liver function. Since the air bag ring is used to squeeze the liver portal tissue, frequent binding is not required, the squeezing force can be effectively controlled, the damage to the liver portal tissue is reduced, and the operation is more convenient.

[0020] 2. The liver portal tissue is sleeved by the cooperation between the driving rack, the third gear, the second pulley set, the first gear, the first pulley set and the second gear. Compared with the existing binding tape around the liver portal tissue, the device is more convenient to operate and improves the convenience.

[0021] 3. The cooperation between the pressing plate, the built-in port, the contraction spring and the blocking rod realizes the limiting locking of the protection shell, and the components in the external shell can be conveniently replaced and maintained.

[0022] 4. The cooperation between the bottom end plate, the sliding shaft, the compression air bag and the return spring can quickly inflate the air bag ring. Since the positioning ball and the positioning hole are arranged, the amount of gas inside the air bag ring is always maintained, the pressure of the air bag ring is accurately controlled, the damage to the liver portal tissue is reduced, flexible control is realized, and the convenience is improved.

[0023] 5. Since the display screen and the prompt lamp are arranged, personnel can be quickly reminded of the set time, and personnel do not need to pay attention to the blocking time at all times, thereby reducing the risk. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is a perspective view of the present application Figure 1 ;

[0025] Figure 2 is a perspective view of the present application Figure 2 ;

[0026] Figure 3 is a sectional structure diagram of the present application Figure 3 ;

[0027] Figure 4This is a schematic diagram of the cross-sectional structure of the rectangular box of the present invention;

[0028] Figure 5 This is a schematic diagram showing the installation position of the first pulley assembly of the present invention;

[0029] Figure 6 This is a schematic diagram of the compression airbag of the present invention;

[0030] Figure 7 This is a schematic diagram showing the installation position of the binding ring according to the present invention;

[0031] Figure 8 This is a schematic diagram of the binding ring structure of the present invention;

[0032] Figure 9 This is a schematic diagram of the external shell structure of the present invention;

[0033] Figure 10 This is a schematic diagram showing the positions of the first and second gears of the present invention.

[0034] Figure 11 This is a cross-sectional view of the limiting ring of the present invention;

[0035] Figure 12 For the present invention Figure 4 Enlarged diagram of point A in the diagram;

[0036] Figure 13 For the present invention Figure 5 Enlarged diagram of point B in the image;

[0037] Figure 14 For the present invention Figure 7 Enlarged diagram of point C in the image.

[0038] Markings in the diagram: 1. Outer shell; 2. Positioning port; 3. Binding ring; 4. Notch; 5. Internal cavity; 6. Airbag ring; 7. Arc groove; 8. Positioning rod; 9. First gear; 10. Second gear; 11. Gear ring; 12. First pulley assembly; 13. Air storage chamber; 14. Elastic tube; 15. Positioning plate; 16. Rectangular box; 17. Third gear; 18. Second pulley; 19. Sliding hole; 20. Drive rack; 21. Drive block; 22. Fixing block; 23. Precision screw; 24. Scale; 25. Lower end 26. Upper rod; 27. Air tank; 28. Air supply pipe; 29. ​​Observation port; 30. Protective shell; 31. Internal port; 32. Blocking rod; 33. Pressing plate; 34. Retraction spring; 35. Bottom plate; 36. Top plate; 37. Sliding shaft; 38. Return spring; 39. Compressed air bag; 40. Sealing block; 41. Auxiliary block; 42. Ventilation pipe; 43. Positioning hole; 44. Limiting ring; 45. Internal hole; 46. Top pressure spring; 47. Positioning ball; 48. Display screen; 49. Indicator light. Detailed Implementation

[0039] Reference will now be made to Figures 1 to 14 Detailed description of the embodiments of the present application will be given, and those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present application, and are not intended to limit the protection scope of the present application.

[0040] A liver portal blocking device for precise blocking in operation, as shown in Figure 1 、 Figure 4 、 Figure 7 、 Figure 8 , comprises an external shell 1, two positioning openings 2 are formed in the lower end of the external shell 1, the two positioning openings 2 form a hollow structure with the inside of the external shell 1, a binding ring 3 is rotatably installed in the inside of the two positioning openings 2, the binding ring 3 can freely rotate along the two positioning openings 2, a notch 4 is formed in the binding ring 3, which facilitates the passage of the liver portal tissue, an internal cavity 5 is formed in the inside of the binding ring 3, the internal cavity 5 is a "T" structure and is provided through the inner wall of the binding ring 3, a gasbag ring 6 is fixedly arranged in the inside of the internal cavity 5, the gasbag ring 6 is a ring-shaped gasbag that will quickly expand after being inflated and will quickly contract after being deflated, in normal state, the gasbag ring 6 is hidden in the inside of the internal cavity 5, a driving device for the rotation of the binding ring 3 is arranged in the inside of the external shell 1, arc-shaped grooves 7 are formed in the front and rear ends of the external shell 1, positioning rods 8 are fixedly installed in the inside of the corresponding arc-shaped grooves 7 at the front and rear ends of the binding ring 3, the positioning rods 8 can reciprocally slide along the corresponding arc-shaped grooves 7, a pneumatic assembly is arranged at the upper end of the external shell 1 (the position and direction of the components in the present application are taken as reference); Figure 1

[0041] In use, the medical staff holds the external shell 1, makes the liver portal tissue pass through the notch 4 into the inside of the binding ring 3, drives the binding ring 3 to rotate along the two positioning openings 2, moves the two positioning rods 8 to the other side of the arc-shaped grooves 7, one end of the binding ring 3 enters the left positioning opening 2, the other end of the binding ring 3 does not leave the right positioning opening 2 (forms a state as shown in Figure 2 ), the binding ring 3 is sleeved on the liver portal tissue, the pneumatic assembly continuously inputs gas into the inside of the gasbag ring 6, the gasbag ring 6 quickly expands from the "T" opening of the internal cavity 5 and gradually approaches the binding ring 3, the expanded gasbag ring 6 continuously extrudes the liver portal tissue, until the liver portal tissue is extruded to the top surface of the lower end of the external shell 1, until the gasbag ring 6 completely extrudes the liver portal tissue, and then subsequent operation is performed, which can effectively reduce bleeding during operation, make the operation field more clear, be beneficial to operation, also can reduce the damage of liver tissue, be helpful to protect liver function, since the gasbag ring 6 is used to extrude the liver portal tissue, the extrusion degree can be effectively controlled, and the damage of the liver portal tissue is reduced;

[0042] ​When the blockage is reached for about fifteen minutes, the pneumatic assembly inhales the gas inside the balloon ring 6 by itself, the balloon ring 6 is shrunk in the built-in cavity 5, and the hepatic portal tissue is not blocked, and the hepatic portal is loosened for a period of time (about 5 minutes), which provides blood supply to the liver, and then the pneumatic assembly and the balloon ring 6 are driven to block the hepatic portal and perform surgery. The hepatic portal blockage can more clearly observe the intrahepatic anatomical structure, which is beneficial to the treatment of intrahepatic bile duct and blood vessels; the positioning rod 8 slides along the arc-shaped groove 7, which improves the stability of the binding ring 3 and can drive the binding ring 3 to form a circular ring, which is more convenient for the sleeve of the hepatic portal tissue. Due to the extrusion of the balloon ring 6 on the hepatic portal tissue, the hepatic portal tissue will not be damaged, and the safety is improved.

[0043] As shown in Figure 2 , Figure 8 , Figure 10 , the driving device includes a first gear 9 and a second gear 10. The first gear 9 is rotatably installed in the rear end of the outer shell 1. The second gear 10 is rotatably installed on the side of the first gear 9 in the rear end of the outer shell 1. The first gear 9 and the second gear 10 are arranged in the circumferential direction of the binding ring 3. The first gear 9 and the second gear 10 are arranged above the binding ring 3. The outer end of the binding ring 3 is fixedly provided with a gear ring 11. The first gear 9 and the second gear 10 are respectively connected with the gear ring 11. The first pulley set 12 includes two first pulleys and a first belt. The rear end shafts of the first gear 9 and the second gear 10 are respectively coaxially fixedly installed with the first pulleys. The first belt is connected between the two first pulleys. The two first pulleys are rotatably installed on the rear end face of the outer shell 1. That is, the first pulley and the first belt are arranged on the outer side of the outer shell 1.

[0044] As shown in Figure 8 , Figure 10 , the inner side of the outer shell 1 is fixedly installed with a gas storage warehouse 13 in front of the first gear 9 and the second gear 10. The inner side of the gas storage warehouse 13 is a hollow structure. The outer end of the left side of the binding ring 3 is fixedly installed with an elastic tube 14. The elastic tube 14 has the characteristics of stretching and shrinking. The elastic tube 14 is arranged close to the positioning rod 8. The other end of the elastic tube 14 is fixedly communicated with the gas storage warehouse 13. The other end penetrates the binding ring 3 and is fixedly communicated with the balloon ring 6. A certain distance is provided between the bottom end of the gas storage warehouse 13 and the binding ring 3. The elastic tube 14 is arranged between the bottom end of the gas storage warehouse 13 and the binding ring 3.

[0045] As shown in Figure 4 , Figure 5 , Figure 12 , Figure 13As shown, the top end of the external shell 1 is fixedly installed with a positioning disc 15, the top end of the positioning disc 15 is fixedly installed with a rectangular box 16, a central cavity is vertically through among the rectangular box 16, the positioning disc 15 and the external shell 1, the third gear 17 is rotatably installed in the interior of the rectangular box 16, the second pulley set 18 is connected between the first gear 9 and the third gear 17, the second pulley set 18 comprises two second pulleys and a second belt, the second pulleys are coaxially and fixedly installed on the first gear 9 and the third gear 17 respectively, the second belt is connected between the two second pulleys, the second belt is arranged in the central cavity, the rear end of the rectangular box 16 is provided with a sliding hole 19, the interior wall of the rectangular box 16 is installed with a driving rack 20 which slides up and down, the driving rack 20 is slidingly connected to the interior wall of the rectangular box 16, the driving rack 20 is in meshing connection with the third gear 17, the driving block 21 which is located in the sliding hole 19 is fixedly installed on the driving rack 20, the driving block 21 can slide up and down along the sliding hole 19;

[0046] In use, the driving block 21 is driven to slide downward along the sliding hole 19, the driving rack 20 meshes with the third gear 17 to rotate in meshing, the second pulley set 18, the first gear 9, the first pulley set 12 and the second gear 10 rotate synchronously, the first gear 9 and the second gear 10 mesh with the gear ring 11 to rotate, the binding ring 3 rotates along the two positioning ports 2, after the two positioning rods 8 move to the other side of the arc-shaped groove 7, the driving block 21 stops moving, at the same time, the elastic tube 14 is elongated, the binding ring 3 forms a circular ring and is sleeved on the hepatic portal tissue, reducing the operation of personnel, only the medical staff needs to push the driving block 21, the sleeving of the hepatic portal tissue can be realized, and the convenience is improved;

[0047] When it is needed to remove the binding ring 3, the driving block 21 is reversely driven to slide upward along the sliding hole 19, the driving rack 20 meshes with the third gear 17 to rotate in meshing, the second pulley set 18, the first gear 9, the first pulley set 12 and the second gear 10 reversely rotate synchronously, the first gear 9 and the second gear 10 mesh with the gear ring 11 to rotate, the binding ring 3 reversely rotates along the two positioning ports 2, so that the binding ring 3 is reset, and the hepatic portal tissue can be separated from the gap 4, that is, it can be quickly taken out from the patient's body.

[0048] As shown in Figure 5 , Figure 13 the upper and lower ends of the sliding hole 19 are fixedly installed with fixed blocks 22 respectively, the fixed blocks 22 are fixedly connected with the rectangular box 16, the precision lead screw 23 is rotatably installed between the two fixed blocks 22, the precision lead screw 23 is threadedly installed on the driving block 21, and the sliding hole 19 is provided with a scale 24 on one side;

[0049] The medical staff rotates the precision screw rod 23 with the driving block 21 up and down reciprocating movement, thereby realizing the control of the binding ring 3, because the scale 24 is arranged, through the scale 24 pointed by the driving block 21, the accurate control of the binding ring 3 is realized, and the thread cooperation between the precision screw rod 23 and the driving block 21 improves the firmness of the binding ring 3.

[0050] As shown in Figure 1 , Figure 3 , the pneumatic assembly includes a lower end rod 25 and an upper end rod 26, the lower end rod 25 is fixedly installed on the top end of the rectangular box 16, the top end of the lower end rod 25 is screw mounted with the upper end rod 26, the lower end rod 25, the upper end rod 26 and the rectangular box 16 are mutually penetrated, the inside of the upper end rod 26 is fixedly installed with the gas storage cylinder 27, the lower end of the gas storage cylinder 27 is fixedly communicated with the gas conveying pipe 28, the bottom end of the gas conveying pipe 28 is fixedly communicated on the gas storage bin 13.

[0051] As shown in Figure 4 , Figure 7 , Figure 14 , the front end of the outer shell 1 is provided with an observation port 29, the observation port 29 is installed with a protective shell 30, the front end of the outer shell 1 is provided with an inner mouth 31 below the observation port 29, two blocking rods 32 are slidingly installed in the inner mouth 31, the two blocking rods 32 are slidingly connected on the outer shell 1, a pressing plate 33 is fixedly installed between the bottom ends of the two blocking rods 32, a contraction spring 34 is fixedly connected on the pressing plate 33, the other end of the contraction spring 34 is fixedly connected on the outer shell 1, the lower end of the protective shell 30 is provided with an inner slot, two insertion holes are provided at the top end of the inner slot;

[0052] The medical staff drives the pressing plate 33 to slide downward along the inner mouth 31, the contraction spring 34 is stretched, the protective shell 30 is manually held on the observation port 29, the pressing plate 33 is loosened, due to the elastic force of the contraction spring 34, the two blocking rods 32 penetrate the upper end of the outer shell 1, and finally inserted into the corresponding insertion hole, thereby realizing the limiting locking of the protective shell 30, the setting of the observation port 29 facilitates the replacement and maintenance of the components in the outer shell 1.

[0053] As shown in Figure 6As shown, the outer side of the upper end rod 26 is sleeved with a bottom end plate 35, which can freely reciprocate up and down along the upper end rod 26. The outer side of the upper end rod 26 is fixedly installed with a top end plate 36 above the bottom end plate 35. The left and right ends of the bottom end plate 35 are respectively fixedly installed with sliding shafts 37. Each sliding shaft 37 is slidably penetrated through the corresponding top end plate 36. Each sliding shaft 37 is sleeved with a return spring 38. The lower end of the return spring 38 is fixedly connected to the bottom end plate 35, and the upper end is fixedly connected to the top end plate 36. The upper end rod 26 is sleeved with a compression air bag 39, which is arranged between the bottom end plate 35 and the top end plate 36. The top end of the upper end rod 26 is fixedly installed with an auxiliary block 41. The top end plate 36 is fixedly installed on the auxiliary block 41. The top end port of the gas delivery pipe 28 is arranged in a flush manner with the top end port of the upper end rod 26. The top end of the gas delivery pipe 28 is threadedly installed with a blocking block 40. One end of a breather pipe 42 is fixedly communicated to the blocking block 40, and the other end is fixedly communicated to the compression air bag 39 through the top end plate 36.

[0054] As shown in Figure 6 , Figure 11 The outer side of the upper end rod 26 is uniformly provided with a plurality of positioning holes 43. The upper end rod 26 is sleeved with a limiting ring 44, which can only reciprocate up and down along the upper end rod 26 and cannot freely rotate. The top end of the limiting ring 44 is fixedly connected between the bottom end plate 35. The inside of the limiting ring 44 is provided with an embedded hole 45. The inside of the embedded hole 45 is fixedly installed with a top pressing spring 46. The other end of the top pressing spring 46 is fixedly installed with a positioning ball 47. Under normal circumstances, due to the elastic force of the top pressing spring 46, the positioning ball 47 is arranged in the embedded hole 45, realizing the positioning of the limiting ring 44 and the bottom end plate 35. The positioning ball 47 is fixedly installed with a pull rod which is slidably penetrated through the outer end of the limiting ring 44. The top pressing spring 46 is sleeved on the pull rod.

[0055] The medical staff drives the pull rod to slide outward. The positioning ball 47 completely separates from the embedded hole 45. The top pressing spring 46 is compressed. The bottom end plate 35 and the two sliding shafts 37 are driven to slide upward. At the same time, the compression air bag 39 and the two return springs 38 are continuously compressed. The gas in the compression air bag 39 enters the air cylinder 27 and the gas delivery pipe 28 through the breather pipe 42, realizing the expansion of the air bag ring 6. When the air bag ring 6 completely blocks the hepatic portal tissue, the pull rod is loosened. Due to the elastic force of the top pressing spring 46, the positioning ball 47 is quickly inserted into the positioning hole 43, realizing the positioning of the limiting ring 44. In this way, the amount of gas inside the air bag ring 6 can be always maintained, the pressure of the air bag ring 6 is accurately controlled, and the damage to the hepatic portal tissue is reduced.

[0056] When the blocking is reached for about fifteen minutes, the pull rod is pulled out, the positioning ball 47 is completely separated from the built-in hole 45, and the bottom end plate 35 slides downward due to the elastic force of the two reset springs 38. The gas in the gasbag ring 6 enters the compression gasbag 39 again through the gas storage warehouse 13, the elastic pipe 14, the gas conveying pipe 28, the gas storage cylinder 27 and the air pipe 42. The gasbag ring 6 no longer squeezes and blocks the hepatic portal tissue. After the hepatic portal is loosened for a period of time, the liver is supplied with blood for about five minutes, so as to avoid damage to the hepatic portal tissue and improve safety. Since the internal gas of the gasbag ring 6 is manually controlled, flexible control is realized and convenience is improved.

[0057] As shown in Figure 9 The lower end rod 25 is internally fixedly installed with a controller and a storage battery. The rectangular box 16 is provided with a display screen 48 and a prompt lamp 49. The display screen 48 and the prompt lamp 49 are respectively connected to the controller through wires. The controller is connected to the storage battery through wires. Personnel set the blocking time through the controller. The display screen 48 displays the set time. When the set time is up, the prompt lamp 49 flashes, prompting the personnel that the time is up, preventing the personnel from forgetting the blocking time, reducing the risk and further improving the practicality of the device.

[0058] It should be noted that in the description of the present application, the terms indicating the direction or positional relationship such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like are based on the direction or positional relationship shown in the drawings, which is only for the convenience of description, and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" are only for the purpose of description and cannot be understood as indicating or implying relative importance.

[0059] In addition, it should also be noted that in the description of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly mounted, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0060] So far, the technical scheme of the present application has been described in combination with the preferred embodiments shown in the drawings, but those skilled in the art can easily understand that the protection scope of the present application is obviously not limited to these specific embodiments. Those skilled in the art can make equivalent changes or replacements to the related technical features without departing from the principles of the present application, and the technical schemes after the changes or replacements will fall within the protection scope of the present application.

Claims

1. A hepatic portal blocking device for precise intraoperative blocking, characterized in that, The utility model provides an external shell (1), the lower end of external shell (1) is equipped with two positioning mouth (2), the inside rotation of two positioning mouth (2) is installed with binding ring (3), is equipped with notch (4) on binding ring (3), the inside of binding ring (3) is equipped with built -in chamber (5), the inside of built -in chamber (5) is provided with air bag ring (6), the inside of external shell (1) is equipped with drive arrangement for the rotation of binding ring (3), the front and rear ends of external shell (1) are equipped with arc slot (7) respectively, the front and rear ends of binding ring (3) are fixedly installed with the positioning rod (8) in the inside of corresponding arc slot (7) respectively, the upper end of external shell (1) is provided with pneumatic assembly.

2. The hepatic portal blocking device for precise blocking during surgery according to claim 1, characterized in that The drive arrangement comprises a first gear (9) and a second gear (10), the first gear (9) is rotatably installed in the inside of the external shell (1), the second gear (10) is rotatably installed on the side of the first gear (9) in the inside of the external shell (1), the first gear (9) and the second gear (10) are arranged above the binding ring (3), the outer end of the binding ring (3) is provided with a gear ring (11), and the first gear (9) and the second gear (10) are provided with a first pulley set (12) on the rear side of the external shell (1).

3. A hepatic portal blocking device for precise blocking during surgery according to claim 2, characterized in that The first gear (9) and the second gear (10) are fixedly installed with a gas storage cabin (13) on the front side of the external shell (1), the outer end of the binding ring (3) is fixedly installed with an elastic tube (14) on one side, and the other end of the elastic tube (14) is fixedly connected with the gas storage cabin (13).

4. The hepatic portal blocking device for precise blocking during surgery according to claim 2, characterized in that The top end of the external shell (1) is fixedly installed with a positioning disc (15), the top end of the positioning disc (15) is fixedly installed with a rectangular box (16), the third gear (17) is rotatably installed in the inside of the rectangular box (16), the first gear (9) and the third gear (17) are connected with a second pulley set (18), the rear end of the rectangular box (16) is provided with a sliding hole (19), the driving rack (20) engaged with the third gear (17) is slidably installed in the inside of the rectangular box (16) up and down, and the driving block (21) in the sliding hole (19) is fixedly installed on the driving rack (20).

5. The Pringle's device according to claim 4, wherein the clamp is provided with a plurality of holes (5) for the passage of the hepatic ducts. The upper and lower ends of the sliding hole (19) are fixedly installed with fixed blocks (22) respectively, the precision lead screw (23) is rotatably installed between the two fixed blocks (22), the precision lead screw (23) is threadedly installed on the driving block (21), and the sliding hole (19) is provided with a scale (24) on one side.

6. The hepatic portal blocking device for precise blocking during surgery according to claim 4, characterized in that The pneumatic assembly comprises a lower end rod (25) and an upper end rod (26), the top end of the rectangular box (16) is fixedly installed with the lower end rod (25), the top end of the lower end rod (25) is threadedly installed with the upper end rod (26), the inside of the upper end rod (26) is fixedly installed with a gas storage cylinder (27), and the lower end of the gas storage cylinder (27) is fixedly installed with a gas delivery pipe (28).

7. The hepatic portal blocking device for precise blocking during surgery according to claim 1, characterized in that The front end of the external shell (1) is provided with an observation port (29), a protective shell (30) is installed in the observation port (29), the front end of the external shell (1) is provided with an internal port (31) below the observation port (29), two blocking rods (32) are slidingly installed in the internal port (31), a pressing plate (33) is fixedly installed between the bottom ends of the two blocking rods (32), and a contraction spring (34) is fixedly connected to the pressing plate (33).

8. The hepatic portal blocking device for precise blocking during surgery according to claim 6, characterized in that A bottom end plate (35) is installed on the upper end rod (26), a top end plate (36) is installed above the bottom end plate (35) on the upper end rod (26), sliding shafts (37) are fixedly installed at both ends of the bottom end plate (35), a reset spring (38) is sleeved on each sliding shaft (37), a compression air bag (39) is sleeved on the upper end rod (26) between the bottom end plate (35) and the top end plate (36), a blocking block (40) is installed at the top end of the gas conveying pipe (28), an auxiliary block (41) is fixedly installed at the top end of the upper end rod (26), and an air pipe (42) is connected between the blocking block (40) and the compression air bag (39).

9. The device for precise intraoperative hepatic portal block according to claim 8, characterized in that A plurality of positioning holes (43) are uniformly formed in the upper end rod (26), a limiting ring (44) is sleeved on the upper end rod (26), the limiting ring (44) is fixedly connected with the bottom end plate (35), an internal hole (45) is formed in the limiting ring (44), a top pressing spring (46) is installed in the internal hole (45), and a positioning ball (47) is fixedly installed on the top pressing spring (46).

10. The hepatic portal blocking device for precise blocking during surgery according to claim 4, characterized in that The rectangular box (16) is provided with a display screen (48) and a prompt lamp (49).

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