Hemostatic stent for heart great vessel surgery

Abstract

The invention belongs to the technical field of medical instruments, and particularly relates to a hemostatic stent for a heart great vessel operation. Comprising a second cylinder body, a contact bag body and a third cylinder body which are sequentially connected from top to bottom, a top opening of the contact bag body is fixedly clamped to a first connecting cylinder, the first connecting cylinder is connected with a bottom opening of the second cylinder body through a thread structure, and a bottom opening of the contact bag body is fixedly clamped to the second connecting cylinder; the second connecting cylinder is connected with the top opening of the third cylinder through a thread structure; a static cylinder body is fixedly mounted at the top of the third barrel body; a movable cylinder body is arranged at an opening of the static cylinder body in a sealing and sliding manner; the contact capsule body comprises an outer capsule layer and an inner capsule layer, the outer capsule layer is used for making contact with the inner wall of a blood vessel, and a capsule cavity is formed between the outer capsule layer and the inner capsule layer. The hemostasis stent is used for stretching into a blood vessel from a blood vessel fracture, the outer wall of the hemostasis stent is in good sealing contact with the inner wall of the blood vessel, the hemostasis stent is not prone to slipping off from the blood vessel, and the amount of bleeding is effectively reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of medical devices, and in particular relates to a hemostatic stent for cardiac and large blood vessel surgery. Background Art

[0002] The function of the heart is to promote blood flow, provide sufficient blood flow to organs and tissues to supply oxygen and various nutrients, and carry away the end products of metabolism so that cells maintain normal metabolism and function.

[0003] During cardiac and vascular surgery, it is often necessary to block a certain section of the blood vessel so that the blood vessels adjacent to the blocked part can be opened for surgical operation; the existing blocking method mainly uses an aortic clamp for blocking. However, cardiac and vascular surgery often requires a long operation time. If the aortic clamp is used for a long time to clamp the aorta for a long time to block blood flow, it will cause certain damage to the outer wall of the aorta.

[0004] After searching, Chinese patent number CN111067584A discloses a hemostatic stent for cardiac and large vessel surgery. By touching the blood vessel to find the slightly protruding part and pressing it, the sliding column slides and the No. 1 valve hole is connected to the air inlet pipe. The high-pressure air in the gas tank can be filled into the elastic bag, so that the elastic bag expands to complete the hemostatic action. After that, the hemostatic forceps are released, and the pipeline of the hemostatic stent is reduced through the built-in gas tank, thereby increasing the interference of the hemostatic stent on the surgical field of view. At the same time, the hemostatic operation can be completed through a smaller incision, reducing surgical trauma.

[0005] However, the inventors have found in clinical practice that the hemostatic stent of the above scheme further increases the contact between the elastic hose and the inner wall of the blood vessel by expanding the elastic hose. Since some operations are difficult and will take a long time, and the blood is under pressure, plasma will gradually penetrate into the gap between the blood vessel and the outer wall of the tube. Since the blood vessel is elastic, after long-term use, the blood vessel will further expand after the plasma penetrates into the gap, which may easily cause the tube to fall off, increasing the risk of the operation. Summary of the invention

[0006] The purpose of the embodiments of the present invention is to provide a hemostatic stent for cardiac and great vessel surgery, aiming to solve the technical problems raised in the above-mentioned background technology.

[0007] To achieve the above object, the present invention provides the following technical solutions.

[0008] A hemostatic stent for cardiac and vascular surgery;

[0009] It comprises a second cylinder, a contact capsule and a third cylinder connected in sequence from top to bottom, wherein the top opening of the contact capsule is fixedly clamped on the first connecting cylinder, the first connecting cylinder is connected to the bottom opening of the second cylinder through a threaded structure, the bottom opening of the contact capsule is fixedly clamped on the second connecting cylinder, and the second connecting cylinder is connected to the top opening of the third cylinder through a threaded structure;

[0010] A static cylinder body is fixedly mounted on the top of the third cylinder body, and a movable cylinder body is sealingly and slidably mounted on the open end of the static cylinder body;

[0011] The contact capsule body comprises an outer capsule layer and an inner capsule layer, wherein the outer capsule layer is used for contacting the inner wall of the blood vessel, and a capsule cavity is formed between the outer capsule layer and the inner capsule layer; the bottom of the static cylinder body implemented by the present invention is connected with a connecting air pipe, and the other end of the connecting air pipe is connected with the capsule cavity;

[0012] A top block is fixedly arranged on the inner wall of the inner capsule layer, and a first support rod and a second support rod are respectively hingedly arranged on the top block, the other end of the first support rod is hinged to the movable cylinder body, and the other end of the second support rod is hinged to the static cylinder body, when the movable cylinder body moves relative to the static cylinder body, the angle between the first support rod and the second support rod changes;

[0013] It also includes an air pipe, a sealing ring sleeve is fixedly arranged on the static cylinder body, the air pipe is fixedly and sealedly penetrated on the sealing ring sleeve, and the air pipe also seals and slides through the dynamic cylinder body.

[0014] Furthermore, the movable cylinder body is provided with an annular cavity matched with the static cylinder body, and the upper opening of the static cylinder body is sealed and slidably pressed against the annular cavity, so that the movable cylinder body can move relative to the static cylinder body while ensuring the sealing between the static cylinder body and the movable cylinder body.

[0015] Furthermore, an elastic connecting cavity is opened on the second cylinder body, and an upper piston block and a lower piston block are supported and slidably arranged in the elastic connecting cavity. The upper piston block and the lower piston block are connected by a connecting spring. A piston rod is fixedly installed on the lower piston block, and the bottom end of the piston rod is fixedly connected to the movable cylinder body.

[0016] Furthermore, the top of the second cylinder is also rotatably connected to the first cylinder, and the first cylinder is provided with a propulsion assembly for pushing the upper piston block toward the lower piston block.

[0017] Furthermore, the propulsion assembly includes an adjusting pressure column, which is slidably arranged on the first cylinder, and the bottom end of the adjusting pressure column slides through and extends into the elastic connecting cavity, and the bottom end of the adjusting pressure column is connected to the upper piston block. When the adjusting pressure column is pushed downward, the upper piston block is pushed toward the lower piston block. Due to the setting of the connecting spring, the lower piston block will have a tendency to move downward, that is, the movable cylinder body will have a tendency to move downward. When there is a loose contact between the inner wall of the blood vessel and the contact sac, the movable cylinder body with a downward movement tendency will also inject air into the sac cavity at any time, and further push the top block to expand outward, so as to maintain good contact between the contact sac and the inner wall of the blood vessel.

[0018] Furthermore, the regulating pressure column has a flat surface and an arc-shaped surface, and a plurality of positioning grooves are provided at equal intervals along the arc-shaped surface; a positioning assembly matching the positioning groove is provided on the first cylinder, and the positioning assembly includes a positioning edge block matching the positioning groove, the positioning edge block is fixedly connected to the positioning slider, and the positioning slider is supported on the supporting slide cavity by a positioning spring, the inclined surface of the positioning edge block is opposite to the inclined surface of the positioning groove, and the inclined surface of the positioning groove faces the piston block upward.

[0019] Furthermore, the top of the adjusting pressure column is coaxially fixedly connected with the handle. When in use, the staff pushes the adjusting pressure column downward by pressing the handle. The interior of the adjusting pressure column has a channel, and the air pipe slides through the channel. The air pipe does not affect the downward pressing of the adjusting pressure column.

[0020] A hose is connected to the handle at the top of the pressure regulating device;

[0021] The outer ring of the first cylinder is coaxially fixed with a ring sleeve, and the inner wall of the ring sleeve is fixed with a plurality of limit blocks in a circular array at equal intervals. The top open portion of the second cylinder is provided with a plurality of limit grooves in a circular array at equal intervals, and the limit grooves cooperate with the limit blocks.

[0022] Compared with the prior art, the beneficial effects of the hemostatic stent for cardiac and large vessel surgery of the present invention are:

[0023] First, when the movable cylinder moves downward relative to the static cylinder, the air in the static cylinder will be compressed; when the air in the static cylinder is compressed, the air in the static cylinder can be injected into the sac cavity, so that the sac cavity is filled with more gas, and then the contact sac is bulged, so that the outer wall of the outer sac layer is in full contact with the inner wall of the blood vessel, thereby improving the sealing performance when in contact; the movable cylinder moves downward relative to the static cylinder, and the gas in the static cylinder is injected into the sac cavity through the connecting trachea, while the angle between the first support rod and the second support rod becomes smaller, pushing the top block to move, that is, pushing the contact sac to be in closer contact with the inner wall of the blood vessel; the hemostatic stent is used to extend into the blood vessel from the fracture of the blood vessel, so that the outer wall of the stent maintains a good sealing contact with the inner wall of the blood vessel, and is not easy to slip off the blood vessel, thereby effectively reducing the amount of bleeding;

[0024] When the first cylinder is pressed and the second cylinder is brought closer together, the limit block will be disengaged downward from the limit groove. Since the first cylinder can rotate relative to the second cylinder, when the limit block is disengaged downward from the limit groove, the staff can manually rotate the first cylinder relative to the second cylinder by a certain angle. At this time, the positioning edge block will be disengaged from the corresponding positioning groove at the same time. That is to say, since the adjusting pressure column has a flat surface, when the positioning edge block is disengaged from the positioning groove, the positioning edge block is transferred to the position of the flat surface. At this time, the adjusting pressure column can be smoothly pulled upward. At this time, the adjusting pressure column is not restricted by the positioning edge block, so it is convenient to pull the adjusting pressure column upward. The upwardly pulled adjusting pressure column synchronously drives the upper piston block to move upward, and then under the connection action of the connecting spring, the movable cylinder body continues to be pulled upward, so that the outer wall of the contact capsule is disengaged from the inner wall of the blood vessel, which is convenient for the cardiac and vascular surgery hemostatic stent of the present invention to be quickly removed after surgery. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A three-dimensional structural diagram of a hemostatic stent for cardiac and large blood vessel surgery according to the present invention;

[0026] Figure 2 for Figure 1 Front view of the hemostatic stent for mid-cardiac and great vessel surgery;

[0027] Figure 3 It is a cross-sectional view of the hemostatic stent for cardiac and great vessel surgery of the present invention;

[0028] Figure 4 It is a schematic diagram of the coordination between the limiting groove and the limiting block in the hemostatic stent for cardiac and large vessel surgery of the present invention;

[0029] Figure 5 It is a schematic diagram of the cooperation between the dynamic cylinder and the static cylinder in the hemostatic stent for cardiac and large vessel surgery of the present invention;

[0030] Figure 6 It is a schematic diagram of the internal structure of the first cylinder in the hemostatic stent for cardiac and large vessel surgery of the present invention;

[0031] Figure 7 for Figure 6 A magnified schematic diagram of part A;

[0032] Figure 8 It is a schematic diagram of the structure of the adjustable pressure column in the hemostatic stent for cardiac and great vessel surgery of the present invention.

[0033] The reference numerals are as follows:

[0034] 100, first cylinder; 101, ring sleeve; 102, limit block; 103, positioning edge block; 104, positioning slider; 105, positioning spring; 106, supporting slide cavity;

[0035] 200, second cylinder; 201, limiting groove; 202, elastic connection cavity;

[0036] 300, contact capsule; 301, first connecting tube; 302, second connecting tube; 303, capsule cavity; 304, outer capsule layer; 305, inner capsule layer; 306, top block; 307, first support rod; 308, second support rod; 309, connecting airway;

[0037] 400, third cylinder;

[0038] 500, handle; 501, channel; 502, adjusting pressure column; 5021, flat surface; 5022, arc surface; 5023, positioning groove; 503, upper piston block;

[0039] 600, static cylinder body; 601, dynamic cylinder body; 602, piston rod; 603, lower piston block; 604, connecting spring; 605, annular cavity; 606, sealing ring sleeve;

[0040] 700, pull rope;

[0041] 800. Trachea. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0043] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0044] In one embodiment of the present invention, a hemostatic stent for cardiac and large vessel surgery is provided. The hemostatic stent is used to extend from the fracture of the blood vessel into the blood vessel, so that the outer wall of the stent maintains good sealing contact with the inner wall of the blood vessel, is not prone to slipping off the blood vessel, and effectively reduces the amount of bleeding.

[0045] Specifically, Figure 1-Figure 3As shown, the hemostatic stent for cardiac and large vessel surgery of the present invention includes a second cylinder 200, a contact capsule 300 and a third cylinder 400 connected in sequence from top to bottom, wherein the top opening of the contact capsule 300 is fixedly clamped on the first connecting cylinder 301, the first connecting cylinder 301 is connected to the bottom opening of the second cylinder 200 through a threaded structure, the bottom opening of the contact capsule 300 is fixedly clamped on the second connecting cylinder 302, and the second connecting cylinder 302 is connected to the top opening of the third cylinder 400 through a threaded structure, thereby realizing the connection between the second cylinder 200, the contact capsule 300 and the third cylinder 400.

[0046] Further, such as Figure 3 and Figure 5 As shown, a static cylinder body 600 is fixedly installed on the top of the third cylinder body 400, and a movable cylinder body 601 is sealed and slidably arranged at the open end of the static cylinder body 600. When the movable cylinder body 601 moves downward relative to the static cylinder body 600, the air in the static cylinder body 600 is compressed.

[0047] Furthermore, since arterial vessels all need to be vented to prevent air embolism, the hemostatic stent for cardiac and large vessel surgery of the present invention also includes an trachea 800 , and a sealing ring sleeve 606 is fixedly provided on the static cylinder body 600 , and the trachea 800 is fixedly sealed and penetrated through the sealing ring sleeve 606 .

[0048] Correspondingly, the contact sac body 300 includes an outer sac layer 304 and an inner sac layer 305. The outer sac layer 304 is used to contact the inner wall of the blood vessel, and a sac cavity 303 is formed between the outer sac layer 304 and the inner sac layer 305. The static cylinder body 600 implemented in the present invention is connected to the bottom with a connecting air pipe 309, and the other end of the connecting air pipe 309 is connected to the sac cavity 303. When the air in the static cylinder body 600 is compressed, the air in the static cylinder body 600 can be injected into the sac cavity 303 to fill the sac cavity 303 with more gas, thereby inflating the contact sac body 300, so that the outer wall of the outer sac layer 304 is in full contact with the inner wall of the blood vessel, thereby improving the sealing performance during contact.

[0049] Please continue reading Figure 3 and Figure 5 The movable cylinder body 601 is provided with an annular cavity 605 which matches with the static cylinder body 600. The upper opening of the static cylinder body 600 is sealed and slidably pressed against the annular cavity 605. While the movable cylinder body 601 can move relative to the static cylinder body 600, the sealing between the static cylinder body 600 and the movable cylinder body 601 is also ensured.

[0050] Furthermore, in an embodiment of the present invention, a top block 306 is fixedly provided on the inner wall of the inner sac layer 305, and a first support rod 307 and a second support rod 308 are hingedly connected to the top block 306, respectively. The other end of the first support rod 307 is hinged to the movable cylinder body 601, and the other end of the second support rod 308 is hinged to the static cylinder body 600. When the movable cylinder body 601 moves relative to the static cylinder body 600, the angle between the first support rod 307 and the second support rod 308 changes. Specifically, the movable cylinder body 601 moves downward relative to the static cylinder body 600, and the gas in the static cylinder body 600 is injected into the sac cavity 303 through the connecting air pipe 309. At the same time, the angle between the first support rod 307 and the second support rod 308 becomes smaller, which pushes the top block 306 to move, that is, pushes the contact between the contact sac body 300 and the inner wall of the blood vessel to be closer.

[0051] Please continue reading Figure 3 The second cylinder 200 of the embodiment of the present invention is provided with an elastic connecting chamber 202, in which an upper piston block 503 and a lower piston block 603 are supported and slidably arranged, and the upper piston block 503 and the lower piston block 603 are connected by a connecting spring 604. Furthermore, a piston rod 602 is fixedly installed on the lower piston block 603, and the bottom end of the piston rod 602 is fixedly connected to the cylinder body 601.

[0052] Preferably, the top of the second cylinder 200 is also rotatably connected to the first cylinder 100 , and the first cylinder 100 is provided with a propulsion assembly for pushing the upper piston block 503 to move toward the lower piston block 603 .

[0053] Specifically, Figure 3 , Figure 6 , Figure 7 and Figure 8 As shown, the propulsion assembly includes an adjusting pressure column 502, which is slidably arranged on the first cylinder 100, and the bottom end of the adjusting pressure column 502 slides through and extends into the elastic connecting cavity 202, and the bottom end of the adjusting pressure column 502 is connected to the upper piston block 503. When the adjusting pressure column 502 is pushed to move downward, the upper piston block 503 is pushed to move toward the lower piston block 603. Since a connecting spring 604 is provided, the lower piston block 603 has a tendency to move downward, that is, the movable cylinder body 601 has a tendency to move downward. When there is a loose contact between the inner wall of the blood vessel and the contact sac 300, the movable cylinder body 601 with a downward movement tendency will also inject air into the sac cavity 303 at any time, and further push the top block 306 to expand outward, so as to maintain good contact between the contact sac 300 and the inner wall of the blood vessel.

[0054] Further, such as Figure 6-Figure 8As shown, the regulating pressure column 502 has a flat surface 5021 and an arc surface 5022, and a plurality of positioning grooves 5023 are provided at equal intervals along the arc surface 5022; the first cylinder 100 is provided with a positioning assembly matched with the positioning groove 5023, the positioning assembly includes a positioning edge block 103 matched with the positioning groove 5023, the positioning edge block 103 is fixedly connected with the positioning slide block 104, the positioning slide block 104 is supported and arranged on the supporting slide cavity 106 by a positioning spring 105, the inclined surface of the positioning edge block 103 is opposite to the inclined surface of the positioning groove 5023, and the inclined surface of the positioning groove 5023 faces the piston block 503 upward;

[0055] In specific implementation, since the inclined surface of the positioning edge block 103 faces upward, it will not affect the downward movement of the adjustment pressure column 502, and after the adjustment pressure column 502 moves down to a specified height, the positioning edge block 103 abuts against the corresponding positioning groove 5023, thereby limiting and fixing the adjustment pressure column 502.

[0056] Please continue reading Figure 3 and Figure 8 In an embodiment of the present invention, the top end of the adjusting pressure column 502 is coaxially fixedly connected to the handle 500. When in use, the staff pushes the handle 500 to push the adjusting pressure column 502 downward. The interior of the adjusting pressure column 502 has a channel 501, and the air pipe 800 slides through the channel 501. The set air pipe 800 does not affect the downward pressing of the adjusting pressure column 502.

[0057] In the embodiment of the present invention, the bottom end of the air pipe 800 extends into the bottom of the third cylinder 400; the air pipe 800 also slides through the cylinder body 601 in a sealed manner, and the top end of the air pipe 800 slides through the lower piston block 603, the upper piston block 503 and the adjusting pressure column 502 in turn.

[0058] Further, such as Figure 3 , Figure 4 and Figure 6 As shown, in the embodiment of the present invention, a ring sleeve 101 is coaxially fixedly provided on the outer ring of the first cylinder 100, and a plurality of limit blocks 102 are fixedly provided on the inner wall of the ring sleeve 101 in a circular array at equal intervals. A plurality of limit grooves 201 are formed in a circular array at equal intervals at the open top of the second cylinder 200, and the limit grooves 201 cooperate with the limit blocks 102, so that there is a certain distance between the first cylinder 100 and the second cylinder 200.

[0059] In the implementation of the present invention, when the first cylinder 100 is pressed to make the first cylinder 100 and the second cylinder 200 close to each other, the limit block 102 will be disengaged downward from the limit slot 201. Since the first cylinder 100 can be rotated relative to the second cylinder 200, at this time, when the limit block 102 is disengaged downward from the limit slot 201, the staff can manually rotate the first cylinder 100 relative to the second cylinder 200 by a certain angle. At this time, the positioning edge block 103 will be disengaged from the corresponding positioning slot 5023 synchronously. That is to say, since the adjustment pressure column 502 has a flat surface 5021, When the positioning edge block 103 is disengaged from the positioning groove 5023, the positioning edge block 103 is transferred to the position of the flat surface 5021. At this time, the adjusting pressure column 502 can be smoothly pulled upward. At this time, the adjusting pressure column 502 is not restricted by the positioning edge block 103, so it is convenient to pull the adjusting pressure column 502 upward. The upwardly pulled adjusting pressure column 502 simultaneously drives the upper piston block 503 to move upward, and then under the connection action of the connecting spring 604, the movable cylinder body 601 continues to be pulled up, thereby separating the outer wall of the contact capsule 300 from the inner wall of the blood vessel, so as to facilitate the rapid removal of the cardiac and vascular surgery hemostatic stent of the present invention after surgery.

[0060] Furthermore, a hose 700 is connected to the handle 500 at the top of the regulating pressure 502 to ensure that the hemostatic stent for cardiac and great vessel surgery of the present invention does not fall off when being dragged. The handle 500 is a circular structure and can pass through the interior of the first cylinder 100 .

[0061] The above solutions are only an illustration of a preferred example, but are not limited thereto. When implementing the present invention, appropriate replacement and / or modification can be performed according to user needs.

[0062] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and the embodiments. It can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily realized. Therefore, without departing from the general concept defined by the claims and equivalent scope, the present invention is not limited to the specific details and the illustrations shown and described here.

Claims

1. A hemostatic stent for cardiac and vascular surgery, comprising a second cylinder (200), a contact capsule (300) and a third cylinder (400) connected in sequence from top to bottom, wherein: The top opening of the contact capsule (300) is fixedly clamped on the first connecting tube (301), the first connecting tube (301) is connected to the bottom opening of the second tube (200) through a threaded structure, the bottom opening of the contact capsule (300) is fixedly clamped on the second connecting tube (302), and the second connecting tube (302) is connected to the top opening of the third tube (400) through a threaded structure; Features: A static cylinder body (600) is fixedly mounted on the top of the third cylinder body (400), and a dynamic cylinder body (601) is sealingly and slidably mounted on the open end of the static cylinder body (600); The contact sac body (300) comprises an outer sac layer (304) and an inner sac layer (305), wherein the outer sac layer (304) is used to contact the inner wall of the blood vessel, and a sac cavity (303) is formed between the outer sac layer (304) and the inner sac layer (305); A communicating air pipe (309) is provided at the bottom of the static cylinder body (600), and the other end of the communicating air pipe (309) is communicated with the capsule cavity (303); A top block (306) is fixedly provided on the inner wall of the inner capsule layer (305), and a first support rod (307) and a second support rod (308) are respectively hingedly provided on the top block (306), the other end of the first support rod (307) is hingedly connected to the moving cylinder body (601), and the other end of the second support rod (308) is hingedly connected to the static cylinder body (600); It also includes an air pipe (800), a sealing ring sleeve (606) is fixedly arranged on the static cylinder body (600), the air pipe (800) is fixedly and sealingly penetrated on the sealing ring sleeve (606), and the air pipe (800) also seals and slides through the dynamic cylinder body (601).

2. The hemostatic stent for cardiac and great vascular surgery according to claim 1, characterized in that: The movable cylinder body (601) is provided with an annular cavity (605) matching with the static cylinder body (600), and the upper opening of the static cylinder body (600) is sealed and slidably pressed against the annular cavity (605).

3. The hemostatic stent for cardiac and great vessel surgery according to claim 2, characterized in that: The second cylinder (200) is provided with an elastic connecting chamber (202), and an upper piston block (503) and a lower piston block (603) are supported and slidably arranged in the elastic connecting chamber (202). The upper piston block (503) and the lower piston block (603) are connected via a connecting spring (604), and a piston rod (602) is fixedly installed on the lower piston block (603), and the bottom end of the piston rod (602) is fixedly connected to the movable cylinder body (601).

4. The hemostatic stent for cardiac and great vessel surgery according to claim 3, characterized in that: The top of the second cylinder (200) is also rotatably connected to the first cylinder (100), and the first cylinder (100) is provided with a propulsion assembly for pushing the upper piston block (503) to move toward the lower piston block (603).

5. The hemostatic stent for cardiac and great vessel surgery according to claim 4, characterized in that: The propulsion assembly comprises an adjusting pressure column (502), which is slidably disposed on the first cylinder (100), the bottom end of the adjusting pressure column (502) slidably extending into the elastic connection cavity (202), and the bottom end of the adjusting pressure column (502) is connected to the upper piston block (503).

6. The hemostatic stent for cardiac and great vessel surgery according to claim 5, characterized in that: The regulating pressure column (502) has a straight surface (5021) and an arc surface (5022), and a plurality of positioning grooves (5023) are provided at equal intervals along the arc surface (5022); a positioning component matched with the positioning groove (5023) is provided on the first cylinder (100), and the positioning component includes a positioning edge block (103) matched with the positioning groove (5023); The positioning edge block (103) is fixedly connected to the positioning slide block (104), and the positioning slide block (104) is supported on the supporting slide cavity (106) through a positioning spring (105); The inclined surface of the positioning edge block (103) is oriented in the opposite direction to the inclined surface of the positioning groove (5023); The inclined surface of the positioning groove (5023) faces the piston block (503) upward.

7. The hemostatic stent for cardiac and great vessel surgery according to claim 6, characterized in that: The top end of the adjusting pressure column (502) is coaxially fixedly connected to the handle (500), the interior of the adjusting pressure column (502) is provided with a channel (501), and the air pipe (800) is slidably penetrated through the channel (501); A hose (700) is connected to the handle (500) at the top of the regulating pressure (502); The outer ring of the first cylinder (100) is coaxially fixedly provided with a ring sleeve (101), and a plurality of limit blocks (102) are fixedly provided on the inner wall of the ring sleeve (101) in a circular array at equal intervals. The top open portion of the second cylinder (200) is provided with a plurality of limit grooves (201) in a circular array at equal intervals, and the limit grooves (201) cooperate with the limit blocks (102).

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