A hemostatic stent for cardiovascular surgery

Abstract

The present invention belongs to the technical field of medical devices, and specifically relates to a hemostatic stent for cardiac great vessel surgery; it includes a second cylinder body, a contact capsule body, and a third cylinder body that are connected in sequence from top to bottom. Among them, the top opening of the contact capsule body is fixedly clamped on the first connecting cylinder, the bottom opening of the first connecting cylinder is connected to the bottom opening of the second cylinder body through a threaded structure, the bottom opening of the contact capsule body is fixedly clamped on the second connecting cylinder, and the top opening of the second connecting cylinder is connected to the top opening of the third cylinder body through a threaded structure; a static cylinder body is fixedly installed at the top of the third cylinder body, and a moving cylinder body is hermetically and slidably arranged at the opening of the static cylinder body; the contact capsule body includes an outer capsule layer and an inner capsule layer, the outer capsule layer is used to contact the inner wall of the blood vessel, and a capsule cavity is formed between the outer capsule layer and the inner capsule layer. The hemostatic stent of the present invention is used to extend into the blood vessel from the blood vessel break, so that a good sealing contact is maintained between its outer wall and the inner wall of the blood vessel, it is not easy to slip off from the blood vessel, and the amount of bleeding is effectively reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical devices, and particularly relates to a hemostatic stent for cardiac great vessel surgery. Background Technique

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

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

[0004] After retrieval, Chinese Patent No. CN111067584A discloses a hemostatic stent for cardiac great vessel surgery. By touching the blood vessel to find a slightly protruding part and pressing it, the sliding column slides and the first valve hole communicates with the air inlet pipe, and then the high-pressure air in the air tank can be filled into the elastic capsule, so that the elastic capsule expands to complete the hemostatic action. After that, the hemostatic clamp is loosened, and the pipeline of the hemostatic stent is reduced through the built-in air tank, thereby increasing the interference of the hemostatic stent to 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 inventor found in clinical practice that the hemostatic stent of the above solution further increases the contact between the elastic hose and the inner wall of the blood vessel by expanding the elastic hose. Due to the large difficulty coefficient of some surgeries, the operation time is relatively long, and the blood has pressure, and the plasma will gradually penetrate into the gap between the blood vessel and the outer wall of the tube. Due to the elasticity of the blood vessel, after long-term use, the blood vessel will further expand after the plasma penetrates into the gap, which easily leads to the tube falling off and increasing the risk of surgery. Summary of the Invention

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

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

[0008] A hemostatic stent for cardiac great vessel surgery;

[0009] It includes a second cylinder body, a contact bladder, and a third cylinder body that are connected in sequence from top to bottom. Among them, the top opening of the contact bladder is fixedly clamped on the first connecting cylinder. The first connecting cylinder is connected to the bottom opening of the second cylinder body through a threaded structure. The bottom opening of the contact bladder is fixedly clamped on the second connecting cylinder. The second connecting cylinder is connected to the top opening of the third cylinder body through a threaded connection structure;

[0010] A static cylinder body is fixedly installed at the top of the third cylinder body. A dynamic cylinder body is hermetically and slidably arranged at the opening of the static cylinder body;

[0011] The contact bladder includes an outer bladder layer and an inner bladder layer. The outer bladder layer is used to contact the inner wall of the blood vessel. A bladder cavity is formed between the outer bladder layer and the inner bladder layer. A communicating air pipe is connected to the bottom of the static cylinder body implemented in the present invention in a communicating manner. The other end of the communicating air pipe is communicated with the bladder cavity;

[0012] On the inner wall of the inner bladder layer, a top block is fixedly arranged. A first support rod and a second support rod are respectively hingedly connected to the top block. The other end of the first support rod is hinged to the dynamic cylinder body, and the other end of the second support rod is hinged to the static cylinder body. When the dynamic cylinder body moves relative to the static cylinder body, the included angle between the first support rod and the second support rod changes;

[0013] It further includes an air pipe. A sealing ring sleeve is fixedly arranged on the static cylinder body. The air pipe is fixedly and hermetically arranged through the sealing ring sleeve. The air pipe also hermetically and slidably penetrates through the dynamic cylinder body.

[0014] Furthermore, an annular cavity that cooperates with the static cylinder body is formed on the dynamic cylinder body. The upper opening of the static cylinder body is hermetically and slidably abutted in the annular cavity, which not only realizes the movement of the dynamic cylinder body relative to the static cylinder body but also ensures the sealing performance between the static cylinder body and the dynamic cylinder body.

[0015] Furthermore, an elastic connection cavity is formed on the second cylinder body. An upper piston block and a lower piston block are supported and slidably arranged in the elastic connection 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. The bottom end of the piston rod is fixedly connected to the dynamic cylinder body.

[0016] Furthermore, a first cylinder body is rotatably connected to the top of the second cylinder body. A propulsion assembly for pushing the upper piston block toward the lower piston block is arranged on the first cylinder body.

[0017] Further, the propulsion assembly includes an adjusting pressure column which is slidably arranged through the first cylinder body. The bottom end of the adjusting pressure column extends through and slides into the elastic connection cavity, and the bottom end of the adjusting pressure column is connected to the upper piston block. When the adjusting pressure column is pushed down, the upper piston block is pushed to move towards the lower piston block. Due to the connection spring, the lower piston block has a tendency to move downwards, that is, the moving cylinder body has a tendency to move downwards. When there is a situation where the contact between the blood vessel inner wall and the contact capsule is not tight, the moving cylinder body with a downward movement tendency will also inject air into the capsule cavity at any time, and further push the top block to expand outwards, maintaining good contact between the contact capsule and the blood vessel inner wall.

[0018] Further, the adjusting pressure column has a flat surface and an arc surface, and a plurality of positioning grooves are equidistantly arranged along the arc surface; a positioning assembly is arranged on the first cylinder body and is matched with the positioning grooves. The positioning assembly includes a positioning edge block matched with the positioning grooves. The positioning edge block is fixedly connected to the positioning slider. The positioning slider is supported on the support sliding cavity through a positioning spring. The inclined surface orientation of the positioning edge block is opposite to that of the positioning groove, and the inclined surface orientation surface of the positioning groove faces the upper piston block.

[0019] Further, the top end of the adjusting pressure column is coaxially and fixedly connected to the handle. During use, the staff pushes the adjusting pressure column down by pressing the handle. The inside of the adjusting pressure column has a channel, and the air pipe slides through the channel. The arranged air pipe does not affect the downward pressing of the adjusting pressure column;

[0020] A hose is connected to the handle at the top end of the adjusting pressure column;

[0021] An annular sleeve is coaxially and fixedly arranged on the outer circle of the first cylinder body. A plurality of limiting blocks are fixedly arranged equidistantly in a circumferential array on the inner side wall of the annular sleeve. A plurality of limiting grooves are equidistantly arranged in a circumferential array at the open top end of the second cylinder body. The limiting grooves are matched with the limiting blocks.

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

[0023] First, when the moving cylinder body moves downward relative to the static cylinder body, the air in the static cylinder body will be compressed; when the air in the static cylinder body is compressed, the air in the static cylinder body can be injected into the capsule cavity so that the capsule cavity is filled with more gas, and then the contact capsule is bulged, so that the outer wall of the outer capsule layer is in full contact with the blood vessel inner wall, improving the sealing performance during contact; when the moving cylinder body moves downward relative to the static cylinder body and injects the gas in the static cylinder body into the capsule cavity through the connecting air pipe, the included angle between the first rod and the second rod becomes smaller, pushing the top block to move, that is, pushing the contact between the contact capsule and the blood vessel inner wall to be closer; this hemostatic stent is used to extend into the blood vessel from the blood vessel break, so that a good sealing contact is maintained between its outer wall and the blood vessel inner wall, and it is not easy to slip off from the blood vessel, effectively reducing the bleeding volume;

[0024] Second, there is a certain distance between the first cylinder and the second cylinder. When the first cylinder is pressed to make the distance between the first cylinder and the second cylinder closer, the limit block will disengage downward from the limit groove. Since the first cylinder can rotate relative to the second cylinder, at this time, when the limit block disengages downward from the limit groove, the operator can manually rotate the first cylinder relative to the second cylinder by a certain angle. At this time, the positioning prism block will be synchronously disengaged from the corresponding positioning groove. That is to say, because the adjusting pressure column has a flat surface, when the positioning prism block disengages from the positioning groove, the positioning prism block moves to the position of the flat surface. At this time, the adjusting pressure column can be smoothly lifted upward. At this time, the adjusting pressure column is not restricted by the positioning prism block, which is convenient to lift the adjusting pressure column upward. The upwardly lifted adjusting pressure column synchronously drives the upper piston block to move upward. Then, under the connection action of the connecting spring, the moving cylinder body is further pulled upward, so that the outer wall of the contact capsule is separated from the inner wall of the blood vessel, which is convenient for the rapid removal of the hemostatic stent for cardiac great vessel surgery of the present invention after the operation. Description of the Drawings

[0025] Figure 1 is a three-dimensional structure diagram of a hemostatic stent for cardiac great vessel surgery of the present invention;

[0026] Figure 2 is Figure 1 the front view of the hemostatic stent for cardiac great vessel surgery;

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

[0028] Figure 4 is a schematic diagram of the cooperation between the limit groove and the limit block in the hemostatic stent for cardiac great vessel surgery of the present invention;

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

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

[0031] Figure 7 is Figure 6 the enlarged schematic diagram of part A;

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

[0033] The reference numerals are as follows:

[0034] 100, First cylinder; 101, Ring sleeve; 102, Limiting block; 103, Positioning prism block; 104, Positioning slider; 105, Positioning spring; 106, Support sliding cavity;

[0035] 200, Second cylinder; 201, Limiting groove; 202, Elastic connection cavity;

[0036] 300, Contact bladder; 301, First connecting cylinder; 302, Second connecting cylinder; 303, Bladder cavity; 304, Outer bladder layer; 305, Inner bladder layer; 306, Top block; 307, First support rod; 308, Second support rod; 309, Connecting air pipe;

[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 block; 601, Moving cylinder block; 602, Piston rod; 603, Lower piston block; 604, Connecting spring; 605, Annular cavity; 606, Sealing ring sleeve;

[0040] 700, Hose;

[0041] 800, Air pipe. Detailed implementation mode

[0042] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to 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 used to limit the present invention.

[0043] The following describes the specific implementation of the present invention in detail with reference to specific embodiments.

[0044] In an embodiment of the present invention, a hemostatic stent for cardiovascular surgery is provided. The hemostatic stent is used to extend into a blood vessel from a blood vessel break, so that a good sealing contact is maintained between its outer wall and the inner wall of the blood vessel, it is not easy to slip off the blood vessel, and the amount of bleeding is effectively reduced.

[0045] Specifically, as Figures 1-3As shown in the figure, the hemostatic stent for cardiovascular surgery of the present invention includes a second cylinder 200, a contact bladder 300, and a third cylinder 400 connected in sequence from top to bottom. Among them, the top opening of the contact bladder 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 bladder 300 is fixedly clamped on the second connecting cylinder 302. The second connecting cylinder 302 is connected to the top opening of the third cylinder 400 through a threaded structure, so as to realize the connection between the second cylinder 200, the contact bladder 300, and the third cylinder 400.

[0046] Further, as Figure 3 and Figure 5 shown, a static cylinder 600 is fixedly installed at the top of the third cylinder 400. A moving cylinder 601 is sealingly slidably arranged at the opening of the static cylinder 600. When the moving cylinder 601 moves downward relative to the static cylinder 600, the air in the static cylinder 600 will be compressed.

[0047] Further, since arterial blood vessels all need to exhaust air to prevent air embolism, the hemostatic stent for cardiovascular surgery of the present invention further includes a trachea 800. A sealing ring sleeve 606 is fixedly arranged on the static cylinder 600. The trachea 800 is fixedly and sealingly arranged through the sealing ring sleeve 606.

[0048] Correspondingly, the contact bladder 300 includes an outer bladder layer 304 and an inner bladder layer 305. The outer bladder layer 304 is used to contact the inner wall of the blood vessel. A bladder cavity 303 is formed between the outer bladder layer 304 and the inner bladder layer 305. A communicating trachea 309 is communicated at the bottom of the static cylinder 600 implemented in the present invention. The other end of the communicating trachea 309 is communicated with the bladder cavity 303. When the air in the static cylinder 600 is compressed, the air in the static cylinder 600 can be injected into the bladder cavity 303, so that more gas is filled in the bladder cavity 303, and then the contact bladder 300 is bulged, so that the outer wall of the outer bladder layer 304 is in full contact with the inner wall of the blood vessel, improving the sealing performance during contact.

[0049] Please continue to refer to Figure 3 and Figure 5 , an annular cavity 605 matching the static cylinder 600 is opened on the moving cylinder 601. The upper opening of the static cylinder 600 is sealingly slidably abutted in the annular cavity 605, which not only realizes the movement of the moving cylinder 601 relative to the static cylinder 600, but also ensures the sealing performance between the static cylinder 600 and the moving cylinder 601.

[0050] Furthermore, in the embodiment of the present invention, a top block 306 is fixedly arranged on the inner wall of the inner capsule layer 305. A first support rod 307 and a second support rod 308 are respectively hinged to the top block 306. The other end of the first support rod 307 is hinged to the moving cylinder body 601, and the other end of the second support rod 308 is hinged to the static cylinder body 600. When the moving cylinder body 601 moves relative to the static cylinder body 600, the included angle between the first support rod 307 and the second support rod 308 changes. Specifically, when the moving cylinder body 601 moves downward relative to the static cylinder body 600, while injecting the gas in the static cylinder body 600 into the capsule cavity 303 through the connecting air pipe 309, the included angle between the first support rod 307 and the second support rod 308 becomes smaller, pushing the top block 306 to move, that is, pushing the contact capsule 300 to contact the blood vessel inner wall more closely.

[0051] Please continue to refer to Figure 3 , an elastic connection cavity 202 is formed on the second cylinder body 200 of the embodiment of the present invention. An upper piston block 503 and a lower piston block 603 are supported and slidably arranged in the elastic connection cavity 202. The upper piston block 503 and the lower piston block 603 are connected by a connection 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 moving cylinder body 601.

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

[0053] Specifically, as shown in Figure 3 , Figure 6 , Figure 7 and Figure 8 , the propulsion assembly includes an adjusting pressure column 502. The adjusting pressure column 502 is slidably arranged through the first cylinder body 100. The bottom end of the adjusting pressure column 502 extends through and slides into the elastic connection 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 downward, that is, pushing the upper piston block 503 to move toward the lower piston block 603. Due to the arrangement of the connection spring 604, the lower piston block 603 has a tendency to move downward, that is, the moving cylinder body 601 has a tendency to move downward. When there is a situation where the contact between the blood vessel inner wall and the contact capsule 300 is not tight, the moving cylinder body 601 with a downward movement tendency will also inject air into the capsule cavity 303 at any time, and further push the top block 306 to expand outward, maintaining a good contact between the contact capsule 300 and the blood vessel inner wall.

[0054] Furthermore, as shown in Figures 6-8As shown, the adjusting pressure column 502 has a flat surface 5021 and an arc surface 5022, and a plurality of positioning grooves 5023 are equidistantly arranged along the arc surface 5022; a positioning component is arranged on the first cylinder body 100 and is matched with the positioning grooves 5023. The positioning component includes a positioning edge block 103 matched with the positioning grooves 5023. The positioning edge block 103 is fixedly connected with a positioning slider 104. The positioning slider 104 is supported on a support sliding cavity 106 through a positioning spring 105. The inclined surface of the positioning edge block 103 faces the opposite direction to the inclined surface of the positioning groove 5023, and the inclined surface of the positioning groove 5023 faces the upper piston block 503.

[0055] During specific implementation, since the inclined surface of the positioning edge block 103 faces upward, it will not affect the downward movement of the adjusting pressure column 502. After the adjusting pressure column 502 moves down to a specified height, the positioning edge block 103 abuts in the corresponding positioning groove 5023, playing a role in limiting and fixing the adjusting pressure column 502.

[0056] Please continue to refer to Figure 3 and Figure 8 In the embodiment of the present invention, the top end of the adjusting pressure column 502 is coaxially and fixedly connected with the handle 500. During use, the staff pushes the adjusting pressure column 502 to move down by pressing the handle 500. A channel 501 is arranged inside the adjusting pressure column 502, and the air pipe 800 slides through the channel 501. The arranged 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 body 400; the air pipe 800 also hermetically slides through the moving cylinder body 601, and the top end of the air pipe 800 sequentially slides through the lower piston block 603, the upper piston block 503 and the adjusting pressure column 502.

[0058] Furthermore, as shown in Figure 3 、 Figure 4 and Figure 6 In the embodiment of the present invention, an annular sleeve 101 is coaxially and fixedly arranged on the outer ring of the first cylinder body 100. A plurality of limiting blocks 102 are fixedly arranged on the inner side wall of the annular sleeve 101 at equal intervals in a circumferential array. A plurality of limiting grooves 201 are arranged at equal intervals in a circumferential array at the open top end of the second cylinder body 200. The limiting grooves 201 are matched with the limiting blocks 102, and there is a certain distance between the first cylinder body 100 and the second cylinder body 200.

[0059] In the embodiment of the present invention, when the first cylinder 100 is pressed so that the first cylinder 100 approaches the second cylinder 200, the limiting block 102 will disengage downward from the limiting groove 201. Since the first cylinder 100 can rotate relative to the second cylinder 200, at this time, when the limiting block 102 disengages downward from the limiting groove 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 rib 103 will synchronously disengage from the corresponding positioning groove 5023. That is to say, since the adjusting pressure column 502 has a flat surface 5021, when the positioning rib 103 disengages from the positioning groove 5023, the positioning rib 103 moves to the position of the flat surface 5021. At this time, the adjusting pressure column 502 can be smoothly lifted upward. At this time, the adjusting pressure column 502 is not restricted by the positioning rib 103, which is convenient for lifting the adjusting pressure column 502 upward. The upwardly lifted adjusting pressure column 502 synchronously drives the upper piston block 503 to move upward. Then, under the connection action of the connecting spring 604, the moving cylinder 601 is further pulled upward, so that the outer wall of the contact capsule 300 is separated from the inner wall of the blood vessel, which is convenient for the quick removal of the hemostatic stent for cardiac great vessel surgery of the present invention after the operation.

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

[0061] The above-mentioned solutions are only illustrative of a preferred example, but are not limited thereto. When implementing the present invention, appropriate substitutions and / or modifications can be made according to the needs of users.

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

Claims

1. A hemostatic stent for cardiovascular surgery, comprising a second cylinder (200), a contact bladder (300) and a third cylinder (400) connected in sequence from top to bottom, wherein, The top open end of the contact capsule (300) is fixedly clamped onto the first connecting cylinder (301). The first connecting cylinder (301) is connected to the bottom open end of the second cylinder body (200) through a threaded structure. The bottom open end of the contact capsule (300) is fixedly clamped onto the second connecting cylinder (302). The second connecting cylinder (302) is connected to the top open end of the third cylinder body (400) through a threaded structure; It is characterized in that: A static cylinder body (600) is fixedly installed at the top of the third cylinder body (400). A moving cylinder body (601) is hermetically and slidably arranged at the open end of the static cylinder body (600); The contact capsule (300) includes an outer capsule layer (304) and an inner capsule layer (305). The outer capsule layer (304) is for contacting the inner wall of the blood vessel. A capsule cavity (303) is formed between the outer capsule layer (304) and the inner capsule layer (305); A communicating air pipe (309) is communicated and arranged at the bottom of the static cylinder body (600). The other end of the communicating air pipe (309) is communicated with the capsule cavity (303); A top block (306) is fixedly arranged on the inner wall of the inner capsule layer (305). A first support rod (307) and a second support rod (308) are respectively hingedly connected to the top block (306). The other end of the first support rod (307) is hinged to the moving cylinder body (601), and the other end of the second support rod (308) is hinged to the static cylinder body (600); It further 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 hermetically penetrated through the sealing ring sleeve (606). The air pipe (800) also hermetically and slidably penetrates through the moving cylinder body (601).

2. The hemostatic stent for cardiovascular surgery according to claim 1, wherein, An annular cavity (605) that cooperates with the static cylinder body (600) is formed on the moving cylinder body (601). The upper open end of the static cylinder body (600) is hermetically and slidably abutted in the annular cavity (605).

3. The hemostatic stent for cardiovascular surgery according to claim 2, characterized in that, An elastic connection cavity (202) is formed on the second cylinder body (200). An upper piston block (503) and a lower piston block (603) are supported and slidably arranged in the elastic connection cavity (202). The upper piston block (503) and the lower piston block (603) are connected by a connecting spring (604). A piston rod (602) is fixedly installed on the lower piston block (603). The bottom end of the piston rod (602) is fixedly connected to the moving cylinder body (601).

4. The hemostatic stent for cardiovascular surgery according to claim 3, wherein, A first cylinder body (100) is also rotatably connected to the top of the second cylinder body (200). A propulsion assembly for pushing the upper piston block (503) towards the lower piston block (603) is arranged on the first cylinder body (100).

5. The hemostatic stent for cardiovascular surgery according to claim 4, characterized in that, The propulsion assembly includes an adjusting pressure column (502). The adjusting pressure column (502) is slidably penetrated through the first cylinder body (100). The bottom end of the adjusting pressure column (502) slidably extends through 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 cardiovascular surgery according to claim 5, wherein The adjusting pressure column (502) has a flat surface (5021) and an arc surface (5022), and a plurality of positioning grooves (5023) are equidistantly arranged along the arc surface (5022); a positioning component is arranged on the first cylinder body (100) and is matched with the positioning grooves (5023), and the positioning component includes a positioning prism block (103) matched with the positioning grooves (5023). The positioning prism block (103) is fixedly connected with a positioning slider (104), and the positioning slider (104) is supported on a support sliding cavity (106) through a positioning spring (105). The inclined surface orientation of the positioning prism block (103) is opposite to that of the positioning groove (5023). The inclined surface of the positioning groove (5023) faces the upper piston block (503).

7. The hemostatic stent for cardiovascular surgery according to claim 6, wherein, The top end of the adjusting pressure column (502) is coaxially and fixedly connected with a handle (500), and a channel (501) is arranged inside the adjusting pressure column (502), and an air pipe (800) is slidably arranged through the channel (501). A hose (700) is connected to the handle (500) at the top end of the adjusting pressure column (502). An annular sleeve (101) is coaxially and fixedly arranged on the outer ring of the first cylinder body (100), and a plurality of limiting blocks (102) are fixedly arranged at equal intervals in a circumferential array on the inner side wall of the annular sleeve (101). A plurality of limiting grooves (201) are arranged at equal intervals in a circumferential array at the open top end of the second cylinder body (200), and the limiting grooves (201) are matched with the limiting blocks (102).

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