A device and method for occluding hepatic inflow during hepatic resection

Abstract

The application discloses a device and method for blocking liver blood flow during liver resection surgery, comprising a fixed frame group, a buckle assembly and a water injection bag; the fixed frame group is composed of a No. 1 frame, a No. 2 frame, a connecting sheet, a hinge nail, a No. 1 connecting block and a No. 2 connecting block; the patient's hepatoduodenal ligament is wrapped by the fixed frame group, and then water is injected into the water injection bag by using a water injection pipe, so that the blood flow of the patient's hepatoduodenal ligament can achieve a satisfactory blocking effect, and the liver portal blood flow blocking during liver resection becomes easier to operate and control, thereby greatly reducing the intraoperative bleeding amount; in addition, when the device is used for liver blood flow blocking, the force on the tissue is uniform, the damage to important structures in the hepatoduodenal ligament during blocking is reduced, and the occurrence of postoperative complications is reduced, thereby being beneficial to the recovery of the patient, and therefore, the device has the advantages of simple use, good effect, small tissue damage and the like, and is worthy of promotion and use in medical institutions.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a device and method for blocking blood flow into the liver during liver resection surgery. Background Technology

[0002] Hepatectomy is one of the important surgical treatments for benign and malignant liver tumors. The unique anatomical structure of the liver, with its dual blood supply from the portal vein and hepatic artery, determines its rich blood supply, making it prone to massive bleeding during hepatectomy. Studies have shown that massive bleeding and subsequent blood transfusions can significantly increase the incidence of postoperative complications and mortality after hepatectomy. Therefore, effectively controlling bleeding during hepatectomy is a key factor affecting the progress of the surgery and postoperative recovery.

[0003] The hepatoduodenal ligament contains the portal vein, the proper hepatic artery, and the extrahepatic bile duct system, which domestic scholars refer to as the first hepatic hilum. Due to its special anatomical structure, it is an important site for blocking blood flow into the liver during hepatectomy. The total hepatic blood flow occlusion method (Pringle method) has become the most widely used hepatic blood flow occlusion technique in hepatectomy because it does not require dissection of the first hepatic hilum, is simple to operate, and is easy to control bleeding.

[0004] Currently, in clinical practice, during open or laparoscopic liver resection, a common red catheter or a slightly elastic band (such as a vascular traction band or glove edge) is often used to completely block the blood flow into the liver by circling around the hepatoduodenal ligament. Although this procedure is simple, it often cannot precisely control the blood flow into the liver. Incomplete blood flow blocking can lead to ineffective bleeding control during liver resection, resulting in excessive intraoperative bleeding. Excessive blocking can cause severe compression damage to important vascular structures within the hepatoduodenal ligament, affecting the patient's later recovery. Therefore, this paper proposes a device and method for blocking the blood flow into the liver during liver resection to address the above problems. Summary of the Invention

[0005] To overcome the shortcomings of existing technologies and solve the problem of poor effectiveness when using urinary catheters to block blood flow to the hepatoduodenal ligament, this invention proposes a device and method for blocking blood flow into the liver during liver resection surgery.

[0006] A device for blocking blood flow into the liver during liver resection surgery includes a fixing frame assembly, a buckle assembly, and a water injection balloon; the fixing frame assembly consists of a first frame, a second frame, a connecting piece, a hinge pin, a first connecting block, and a second connecting block;

[0007] Two sets of hinge pins are provided, and the two sets of hinge pins are symmetrically fixed to one end of frame 1 and frame 2; the connecting piece is provided on the two sets of symmetrically arranged hinge pins, and the hinge pins pass through the connecting piece; the first connecting block is fixed to the end of frame 1 away from the hinge pin; the second connecting block is fixed to the end of frame 2 away from the hinge pin.

[0008] The buckle assembly is located on the first and second frames at the ends away from the hinge pins; the water injection bladder is located inside the first and second frames, and when not filled with water, the water injection bladder is tightly attached to the inner layer of the fixed frame group. After filling with water, it can expand inward and reduce the internal space of the fixed frame group, so that the hepatoduodenum located in the middle of the fixed frame group can be squeezed by the outside of the water injection bladder, thereby using the deformation of the water injection bladder to compress the internal tissue.

[0009] Preferably, the buckle assembly consists of a buckle plate, a locking block, and a first spring; the buckle plate is rotatably connected to a second connecting block, and the other end of the buckle plate is locked to the outside of the first connecting block; the first connecting block has a movable groove corresponding to the inner sidewall of the buckle plate, and the locking block moves within the movable groove; the first spring is disposed within the movable groove, and one end of the first spring is fixed to the bottom surface of the locking block located within the movable groove; the end of the locking block located outside the movable groove is locked to the inner sidewall of the buckle plate. When the first spring deforms, it generates a certain elastic potential energy, which, under the elastic potential energy of the first spring, can drive the locking block to move outward, that is, to pass through the first connecting block and lock onto the inner side of the buckle plate.

[0010] Preferably, a buffer component is movably connected to the second connecting block, and the end of the buffer component close to the first connecting block is attached to the first connecting block. When the first connecting block and the second connecting block contact and engage, the buffer component on the second connecting block will contact the first connecting block and increase the buffering force between the first connecting block and the second connecting block.

[0011] Preferably, the buffer assembly consists of a straight rod, a second spring, and a buffer plate; two sets of straight rods are provided, and the two sets of straight rods are symmetrically fixed to the side wall of the buffer plate near the second connecting block; the end of the straight rod near the second connecting block passes through the second connecting block; the second spring is sleeved on the straight rod and is located between the buffer plate and the second connecting block; the end of the buffer plate near the first connecting block is attached to the first connecting block. When the straight rod passes through the second connecting block, the second spring on the straight rod will undergo a certain degree of deformation and simultaneously generate elastic potential energy. The elastic potential energy generated by the second spring can realize the buffering effect between the first and second connecting blocks.

[0012] Preferably, a limiting groove is formed inside the second connecting block, and one end of the straight rod located inside the second connecting block slides in the limiting groove. When the first connecting block and the second connecting block gradually approach each other, the straight rod will slide in the limiting groove inside the second connecting block. At the same time, under the deformation of the second spring, the buffering force provided by the buffer assembly reaches its maximum.

[0013] Preferably, the water-filled balloon is located inside the first frame and the second frame, and a connecting plate is glued to the side of the water-filled balloon closest to the inner wall of the first frame and the second frame; the connecting plate is located inside the first frame and the second frame, and the inner ring of saline can be completely released by aspirating it through the water-filled tube to completely relax the obstruction of blood flow into the liver; during the operation, the blood flow at the porta hepatis is repeatedly blocked and the pressure is adjusted by repeatedly injecting and draining water into the water-filled balloon.

[0014] Preferably, one end of the water injection bladder is provided with a water injection pipe, and the water injection pipe is connected to the water injection bladder; the water injection pipe passes through the second frame.

[0015] Preferably, the buckle plate is configured as a "U" shaped structure; the first frame and the second frame are both configured as arc-shaped ring structures; and the connecting piece is configured as an arc-shaped structure.

[0016] A method for blocking blood flow to the liver during liver resection surgery, the method comprising the following steps:

[0017] S1: Open the lesser omentum, prepare the occlusion site of the hepatoduodenal ligament, and prepare the occlusion device consisting of a fixation frame assembly, a snap-fit ​​assembly, and an injection balloon.

[0018] S2: Place the unfilled blocking device around the hepatoduodenal ligament and secure the buckles at both ends properly;

[0019] S3: Continuously inject water into the blocking device and observe the blocking effect according to the blocking requirements until a satisfactory blocking effect is achieved.

[0020] Preferably, in step S2, the blocking device consists of a fixed frame assembly, a snap-fit ​​assembly, and a water injection bladder.

[0021] The advantages of this invention are:

[0022] 1. This invention uses a fixed frame assembly to wrap around the hepatoduodenal ligament of the patient, and then uses an injection tube to inject water into the injection bladder, so that the blood flow at the hepatoduodenal ligament can be satisfactorily blocked. This makes the blockage of blood flow at the porta hepatis during hepatectomy easier to operate and control, thereby greatly reducing intraoperative bleeding. In addition, when using this device to block the blood flow into the liver, the force applied to the tissue is uniform, reducing damage to important structures within the hepatoduodenal ligament during the blockage, thereby reducing the occurrence of later complications and facilitating patient recovery. Therefore, it has the advantages of being easy to use, effective, and causing little tissue damage, and is worthy of promotion and use in medical institutions.

[0023] 2. This invention, by setting up a snap-fit ​​assembly, utilizes a fixed frame to wrap around the hepatoduodenal ligament of the patient during liver resection surgery. Then, the first frame and the second frame are brought closer together, and the snap plate on the second frame is used to snap onto the first frame, realizing the ring operation of the fixed frame assembly. This facilitates the positioning of the patient's hepatoduodenal ligament. At this time, physiological saline is injected into the water injection balloon through the water injection tube. The deformation of the water injection balloon achieves the effect of blocking blood flow to the patient's hepatoduodenal ligament. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a perspective view of one embodiment of the present invention;

[0026] Figure 2 This is a top view of one embodiment of the present invention;

[0027] Figure 3 This is a first cross-sectional view of an embodiment of the present invention;

[0028] Figure 4 This is a second cross-sectional view of one embodiment of the present invention.

[0029] In the diagram: 11. Frame No. 1; 12. Frame No. 2; 13. Connecting Block No. 2; 131. Buckle Plate; 132. Buffer Plate; 133. Spring No. 2; 134. Straight Rod; 135. Limiting Groove; 14. Connecting Block No. 1; 141. Movable Groove; 142. Locking Block; 143. Spring No. 1; 15. Connecting Plate; 16. Hinge Pin; 17. Connecting Plate; 2. Water Injection Bag; 21. Water Injection Pipe. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Please see Figure 1-4 As shown, a device for blocking blood flow into the liver during liver resection surgery includes a fixing frame assembly, a buckle assembly, and a water injection bladder 2; the fixing frame assembly consists of a first frame 11, a second frame 12, a connecting piece 15, a hinge pin 16, a first connecting block 14, and a second connecting block 13.

[0032] Two sets of hinge pins 16 are provided, and the two sets of hinge pins 16 are symmetrically fixed to one end of the first frame 11 and the second frame 12; the connecting piece 15 is provided on the two sets of symmetrically arranged hinge pins 16, and the hinge pins 16 pass through the connecting piece 15; the first connecting block 14 is fixed to the end of the first frame 11 away from the hinge pins 16; the second connecting block 13 is fixed to the end of the second frame 12 away from the hinge pins 16;

[0033] The buckle assembly is located on one end of the first frame 11 and the second frame 12 away from the hinge pin 16; the water injection bladder 2 is located inside the first frame 11 and the second frame 12.

[0034] Specifically, both frame 11 and frame 12 are arc-shaped ring structures with grooves inside for placing the inflatable balloon 2. Both frames 11 and 12 have a certain degree of plasticity, naturally forming circular ring structures made of elastic material. Under external force, they can be stretched and deformed. Specifically, the dimensions of the fixed frame group in this invention are set as follows: width 10mm, thickness 3mm, and circumference 15cm. The inflatable balloon 2 is a transparent membrane structure, similar to the inflatable balloon 2 of a common urinary catheter in the prior art. Its width and circumference are similar to the outer ring. When not inflated, the inflatable balloon 2 is tightly attached to the inner layer of the fixed frame group. After inflating, it can expand inward and reduce the internal space of the fixed frame group, so that the hepatoduodenal ligament located in the middle of the fixed frame group can be compressed by the outside of the inflatable balloon 2. Thus, the deformation of the inflatable balloon 2 can compress the internal tissues.

[0035] In one embodiment of the present invention, the buckle assembly comprises a buckle plate 131, a locking block 142, and a first spring 143; the buckle plate 131 is rotatably connected to a second connecting block 13, and the other end of the buckle plate 131 is engaged with the outside of the first connecting block 14; the first connecting block 14 has a movable groove 141 corresponding to the inner sidewall of the buckle plate 131, and the locking block 142 is movable within the movable groove 141; the first spring 143 is disposed within the movable groove 141, and one end of the first spring 143 is fixedly connected to the bottom surface of the locking block 142 located within the movable groove 141; the end of the locking block 142 located outside the movable groove 141 is engaged with the inner sidewall of the buckle plate 131.

[0036] Specifically, when frame 11 and frame 12 are manually engaged at the patient's hepatoduodenal ligament, connecting block 14 on frame 11 contacts connecting block 13 on frame 12. Under manual operation, the buckle 131 on connecting block 13 can be rotated and engaged on the outside of connecting block 14. When buckle 131 moves to contact the two side walls of connecting block 14, it can squeeze the locking block 142 on connecting block 14, causing the locking block 142 to move inward. When the locking block 142 moves inward, it will squeeze the internal spring 143, causing the spring 143 to deform. When the spring 143 deforms, it will generate a certain elastic potential energy. At this time, under the elastic potential energy of spring 143, it can drive the locking block 142 to move outward, that is, it can penetrate connecting block 14 and engage on the inside of buckle 131.

[0037] In one embodiment of the present invention, a buffer component is movably connected to the second connecting block 13, and the end of the buffer component near the first connecting block 14 is attached to the first connecting block 14.

[0038] Specifically, when the first connecting block 14 and the second connecting block 13 come into contact and engage, the buffer component on the second connecting block 13 will come into contact with the first connecting block 14 and increase the buffering force between the first connecting block 14 and the second connecting block 13.

[0039] In one embodiment of the present invention, the buffer assembly comprises a straight rod 134, a second spring 133, and a buffer plate 132; two sets of straight rods 134 are provided, and the two sets of straight rods 134 are symmetrically fixed to one end sidewall of the buffer plate 132 near the second connecting block 13; the end of the straight rod 134 near the second connecting block 13 passes through the second connecting block 13; the second spring 133 is sleeved on the straight rod 134, and the second spring 133 is disposed between the buffer plate 132 and the second connecting block 13; the end of the buffer plate 132 near the first connecting block 14 is attached to the first connecting block 14.

[0040] Specifically, when the first connecting block 14 and the second connecting block 13 come into contact, the buffer plate 132 first contacts the first connecting block 14. At the same time, as human intervention continues, the gap between the first connecting block 14 and the second connecting block 13 gradually decreases. At this time, the buffer plate 132 will continue to adhere to the side wall of the first connecting block 14. Meanwhile, the straight rod 134 on the back of the buffer plate 132 will move inside the second connecting block 13. When the straight rod 134 penetrates inside the second connecting block 13, the second spring 133 on the straight rod 134 will undergo a certain degree of deformation and simultaneously generate elastic potential energy. By utilizing the elastic potential energy generated by the second spring 133, the buffering effect between the first connecting block 14 and the second connecting block 13 can be achieved.

[0041] In one embodiment of the present invention, a limiting groove 135 is provided inside the second connecting block 13, and one end of the straight rod 134 located inside the second connecting block 13 slides in the limiting groove 135.

[0042] Specifically, as the first connecting block 14 and the second connecting block 13 gradually approach each other, the straight rod 134 will slide in the limiting groove 135 inside the second connecting block 13, and at the same time, under the deformation of the second spring 133, the buffering force provided by the buffer assembly reaches its maximum.

[0043] In one embodiment of the present invention, the water injection bladder 2 is disposed inside the first frame 11 and the second frame 12, and a connecting plate 17 is glued to the side of the water injection bladder 2 near the inner wall of the first frame 11 and the second frame 12; the connecting plate 17 is disposed inside the first frame 11 and the second frame 12.

[0044] Specifically, when the fixed frame is wrapped around the patient's hepatoduodenal ligament in an arc-shaped ring, the doctor injects different doses of saline into the infusion balloon 2 through the infusion tube 21. During the injection process, the saline solution must be continuously injected through the hepatoduodenal ligament tissue to maintain the blockage. Once a satisfactory blockage effect is achieved, the injection of saline solution is stopped. If the blockage is too loose, more saline solution can be added to increase the blockage pressure; if the blockage is too tight, excess saline solution can be aspirated. The amount of water injected into the infusion balloon 2 can be adjusted at any time through the infusion tube 21. Simultaneously, aspirating the inner ring of saline solution through the infusion tube 21 completely relaxes the blockage of blood flow into the liver. During the procedure, repeated injection and drainage of the infusion balloon 2 repeatedly blocks and adjusts the pressure of blood flow at the porta hepatis.

[0045] In one embodiment of the present invention, a water injection pipe 21 is provided at one end of the water injection bladder 2, and the water injection pipe 21 is connected to the water injection bladder 2; the water injection pipe 21 passes through the second frame 12.

[0046] In one embodiment of the present invention, the buckle plate 131 is configured as a "U" shaped structure; the first frame 11 and the second frame 12 are both configured as arc-shaped ring structures; and the connecting piece 15 is configured as an arc structure.

[0047] A method for blocking blood flow to the liver during liver resection surgery, the method comprising the following steps:

[0048] S1: Open the lesser omentum, prepare the occlusion site of the hepatoduodenal ligament, and prepare the occlusion device consisting of a fixation frame assembly, a snap-fit ​​assembly, and an injection balloon.

[0049] S2: Place the unfilled blocking device around the hepatoduodenal ligament and secure the buckles at both ends properly;

[0050] S3: Continuously inject water into the blocking device and observe the blocking effect according to the blocking requirements until a satisfactory blocking effect is achieved.

[0051] Working principle: In current clinical practice, during open or laparoscopic liver resection, a common red catheter or a slightly elastic band (such as a vascular traction band or glove edge) is often used to completely block the blood flow into the liver by circling around the hepatoduodenal ligament. Although this procedure is simple, it often cannot precisely control the blood flow into the liver. Incomplete blood flow blockage can lead to ineffective control of bleeding during liver resection, resulting in excessive intraoperative bleeding. Excessive blockage can cause severe compression damage to important tubular structures within the hepatoduodenal ligament, affecting the patient's later recovery.

[0052] During open or laparoscopic liver resection, the device of the present invention first opens the lesser omentum to prepare the site for blocking the hepatoduodenal ligament; then, the uninjected fixation frame assembly is placed around the hepatoduodenal ligament, and the first frame 11 and the second frame 12 are secured with the buckle components at both ends facing upwards; if portosystemic occlusion is required during liver resection, different doses of physiological saline can be injected into the water injection balloon 2 through the water injection tube 21, and the blocking status of the hepatoduodenal ligament tissue in the device can be observed while injecting water until a satisfactory blocking effect is achieved;

[0053] The device allows for several adjustments to the blood flow control mechanism. If the blockage is too loose, saline solution can be added to increase the pressure; if it is too tight, excess saline solution can be aspirated. The amount of water injected into the inner ring can be adjusted via the injection tube 21. Aspirating the saline solution from the inner ring through the injection tube 21 completely relaxes the blockage on blood flow into the liver. During the procedure, repeated injection and drainage of the inner ring injection balloon 2 repeatedly blocks and adjusts the pressure of blood flow into the hepatic portal vein. A fixed frame is used to wrap around the patient's hepatoduodenal ligament, and then water is injected into the injection balloon 2 via the injection tube 21, ensuring satisfactory blood flow blockage at the hepatoduodenal ligament. This makes the blockage of blood flow into the hepatic portal vein easier to perform and control during liver resection, significantly reducing intraoperative bleeding. Furthermore, this device applies even pressure to the tissues during hepatic blood flow control, reducing damage to important structures within the hepatoduodenal ligament and thus minimizing later complications and promoting patient recovery. Therefore, it is convenient to use, effective, and causes minimal tissue damage, making it worthy of widespread adoption in medical institutions.

[0054] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0055] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A device for blocking blood flow into the liver during liver resection surgery, characterized in that: It includes a fixed frame assembly, a buckle assembly, and a water injection bladder (2); the fixed frame assembly consists of a first frame (11), a second frame (12), a connecting piece (15), a hinge pin (16), a first connecting block (14), and a second connecting block (13); Two sets of hinge pins (16) are provided, and the two sets of hinge pins (16) are symmetrically fixed to one end of the first frame (11) and the second frame (12); the connecting piece (15) is provided on the two sets of symmetrically arranged hinge pins (16), and the hinge pins (16) pass through the connecting piece (15); the first connecting block (14) is fixed to the first frame (11) at the end away from the hinge pins (16); the second connecting block (13) is fixed to the second frame (12) at the end away from the hinge pins (16); The buckle assembly is located on one end of the first frame (11) and the second frame (12) away from the hinge pin (16); the water injection bladder (2) is located inside the first frame (11) and the second frame (12); The water injection bladder (2) is disposed inside the first frame (11) and the second frame (12), and a connecting plate (17) is glued to the side of the water injection bladder (2) close to the inner wall of the first frame (11) and the second frame (12); the connecting plate (17) is disposed inside the first frame (11) and the second frame (12); a water injection pipe (21) is disposed at one end of the water injection bladder (2), and the water injection pipe (21) is connected to the water injection bladder (2); the water injection pipe (21) penetrates the second frame (12); The buckle assembly consists of a buckle plate (131), a locking block (142), and a first spring (143). The buckle plate (131) is rotatably connected to a second connecting block (13), and the other end of the buckle plate (131) is locked to the outside of the first connecting block (14). The first connecting block (14) has a movable groove (141) corresponding to the inner wall of the buckle plate (131), and the locking block (142) moves within the movable groove (141). The first spring (143) is located within the movable groove (141), and one end of the first spring (143) is fixed to the bottom surface of the locking block (142) located within the movable groove (141). The end of the locking block (142) located outside the movable groove (141) is locked to the locking block. It is attached to the inner wall of the buckle plate (131); when the first frame and the second frame are attached to the patient's hepatoduodenal ligament under human intervention, the first connecting block on the first frame and the second connecting block on the second frame will contact each other. Under human intervention, the buckle plate on the second connecting block can be rotated and attached to the outside of the first connecting block. When the buckle plate moves to contact the two side walls of the first connecting block, it can squeeze the locking block on the first connecting block and make the locking block move inward. When the locking block moves inward, it will squeeze the first spring inside and make the first spring deform. When the first spring deforms, it will generate a certain elastic potential energy. At this time, under the elastic potential energy of the first spring, it can drive the locking block to move outward, that is, it can penetrate the first connecting block and be attached to the inner side of the buckle plate. During open or laparoscopic liver resection, the lesser omentum is first opened to prepare the site for occlusion of the hepatoduodenal ligament. Then, the fixation frame assembly without water injection is placed around the hepatoduodenal ligament, and the first frame and the second frame are secured with the buckle components at both ends, with the buckle components facing upwards. If portosystemic occlusion is required during liver resection, different doses of physiological saline can be injected into the water injection balloon through the water injection tube. While injecting water, the occlusion status of the hepatoduodenal ligament tissue in the device can be observed until occlusion is achieved. During the procedure, the blood flow at the porta hepatis is repeatedly blocked and the pressure is adjusted by repeatedly injecting and draining water from the inner water-filled balloon. When not filled with water, the water-filled bladder is tightly attached to the inner layer of the fixed frame assembly; The patient's hepatoduodenal ligament was wrapped with a fixed frame, and then water was injected into the injection bladder through an injection tube to block the blood flow to the patient's hepatoduodenal ligament. After being injected with water, it expands inward and reduces the internal space of the fixed frame group, so that the hepatoduodenum located in the middle of the fixed frame group can be squeezed by the outside of the water-filled bladder, and thus the deformation of the water-filled bladder can compress the internal tissue.

2. The device for blocking blood flow into the liver during liver resection surgery according to claim 1, characterized in that: A buffer component is movably connected to the second connecting block (13), and the end of the buffer component close to the first connecting block (14) is attached to the first connecting block (14).

3. The device for blocking blood flow into the liver during liver resection surgery according to claim 2, characterized in that: The buffer assembly consists of a straight rod (134), a second spring (133), and a buffer plate (132). Two sets of straight rods (134) are provided, and the two sets of straight rods (134) are symmetrically fixed to the side wall of the buffer plate (132) near the second connecting block (13). The end of the straight rod (134) near the second connecting block (13) passes through the second connecting block (13). The second spring (133) is sleeved on the straight rod (134) and is located between the buffer plate (132) and the second connecting block (13). The end of the buffer plate (132) near the first connecting block (14) is attached to the first connecting block (14).

4. The device for blocking blood flow into the liver during liver resection surgery according to claim 3, characterized in that: The second connecting block (13) has a limiting groove (135) inside, and the straight rod (134) slides in the limiting groove (135) at one end inside the second connecting block (13).

5. The device for blocking blood flow into the liver during liver resection surgery according to claim 1, characterized in that: The buckle plate (131) is configured as a "U" shaped structure; the first frame (11) and the second frame (12) are both configured as arc-shaped ring structures; the connecting piece (15) is configured as an arc-shaped structure.

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