hemostatic valve

Abstract

This invention relates to a hemostatic valve, comprising: a first tube having opposing first and second ports; a second tube disposed within the first tube, with a radial gap between the first and second tubes; a first connector, fitted at the first port and used to control the opening or closing of the second tube; in use, the gap is connected to the bloodstream through the first connector; a second connector, fitted at the second port and used to control the opening or closing of the second tube, and the gap is isolated from the outside through the second connector. This hemostatic valve achieves triple sealing through blood filling, providing excellent sealing performance. Furthermore, the radial gap between the first and second tubes is automatically filled with the patient's own blood from within the blood vessel, eliminating the need for additional filling with other liquids. This makes operation simple and convenient, ensures high safety, guarantees pressure balance within the hemostatic valve, and allows for adaptation to interventional devices of different sizes and shapes, providing a sufficient and reliable seal. It exhibits high adaptability and strong compatibility.

Description

Technical Field

[0001] This invention relates to the field of medical devices, and more particularly to a hemostatic valve. Background Technology

[0002] In interventional procedures, hemostatic valves are commonly used to prevent blood loss and injury. Currently, most commercially available hemostatic valves utilize an elastomer with an incision for sealing. However, due to the expansion of the instrument, the incision of the elastomer cannot completely adhere to the outer surface of the instrument, leading to leakage under continuous blood pressure. To address this, improved hemostatic valves fill the sealed space with an external medium such as saline solution. This medium then encapsulates the instrument, achieving a sealing and hemostatic function. However, using this type of hemostatic valve typically requires pre-filling with an external fluid medium, making the operation complex and time-consuming. Summary of the Invention

[0003] This invention provides a hemostatic valve to solve the problems of blood leakage and inconvenient operation associated with hemostatic valves.

[0004] This invention provides a hemostatic valve, comprising:

[0005] The first pipe has a first and a second opening;

[0006] A second tube is disposed inside the first tube, and there is a radial gap between the first tube and the second tube;

[0007] A first connector, fitted at the first tube opening and used to control the opening or closing of the second tube; in use, the gap communicates with blood within the human body through the first connector; and

[0008] The second connector is installed at the second pipe opening and is used to control the opening or closing of the second pipe. The gap is isolated from the outside through the second connector.

[0009] For example, the first connector includes a first elastic body, on which a first slit and at least one through hole are provided; in use, the gap communicates with blood in the human body through the through hole; the first slit elastically engages with the second tube to control the opening or closing of the second tube.

[0010] For example, the first elastic body is also provided with a slot; the second tube includes a tube body and at least one mounting part connected to one end of the tube body, the first cut elastically engages with the tube body, and the mounting part passes through the slot on one side of the first cut and is fixedly connected to the first connector.

[0011] For example, the mounting section is formed by cutting the port of the tube.

[0012] For example, the mounting part is inserted into the slot outside the first cut and fixedly connected to the first connector, and the mounting part covers part of the through hole.

[0013] For example, the mounting section includes two mounting portions formed by cutting the port of the tube; the first elastic body has two corresponding slots; and one mounting portion is inserted into one slot and fixedly connected to the first connector.

[0014] For example, the two slots are symmetrically distributed relative to the first cut; the first connector also includes two through holes symmetrically distributed relative to the first cut, each through hole being disposed between the first cut and a corresponding slot.

[0015] For example, the second connector includes a second elastic body having a recessed area, the bottom of which forms a second cut, the second cut elastically engaging the second tube to control the opening or closing of the second tube.

[0016] For example, the second elastic body is also provided with an annular groove surrounding the second cut, and one end of the second tube passes through the annular groove outside the second cut and is fixedly connected to the second elastic body.

[0017] For example, the first connector includes a first elastic body with a linear first slit on the first elastic body, the first slit elastically engaging with the second tube to control the opening or closing of one end of the second tube; the second connector includes a second elastic body with a linear second slit on the second elastic body, the second slit elastically engaging with the second tube to control the opening or closing of the other end of the second tube.

[0018] For example, the other end of the second tube is twisted relative to one end of the second tube.

[0019] For example, on the same projection plane perpendicular to the axis of the second tube, the projection of the first cut intersects with the projection of the second cut.

[0020] For example, the hemostatic valve also includes a first fitting and a second fitting; the first connector is embedded between the first tube and the second tube at the first port, and the first fitting is detachably fitted onto the first tube at the first port; the second connector is embedded between the first tube and the second tube at the second port, and the second fitting is detachably fitted onto the first tube at the second port.

[0021] For example, the first pipe also includes at least one interface on its pipe wall, with the gap communicating with the interface.

[0022] The technical solutions provided in the embodiments of the present invention have the following advantages compared with the prior art:

[0023] The hemostatic valve of this embodiment achieves triple sealing through blood filling, resulting in excellent sealing performance. Furthermore, the radial gap between the first and second tubes is automatically filled with autologous blood from within the blood vessel, eliminating the need for additional fluids. This simplifies operation, enhances safety, and avoids additional costs. Moreover, compared to other filling fluids, blood filling from within the blood vessel is dynamic, allowing the filling volume to be adjusted based on device placement, ensuring pressure balance within the hemostatic valve. Additionally, the radial gap is filled with autologous blood, the filling volume of which can be varied depending on the inserted device. Therefore, it can accommodate interventional devices of different sizes and shapes inserted into the hemostatic valve, providing a thorough and reliable seal with high adaptability and compatibility. Attached Figure Description

[0024] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0025] 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, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is an exploded three-dimensional structural diagram of a hemostatic valve provided in the first embodiment of the present invention;

[0027] Figure 2 yes Figure 1 A cross-sectional view of the hemostatic valve after assembly.

[0028] Figure 3 yes Figure 2 An enlarged schematic diagram of the proximal end of the hemostatic valve in the image;

[0029] Figure 4 yes Figure 2 An enlarged schematic diagram of the distal end of the hemostatic valve in the diagram;

[0030] Figure 5 yes Figure 2 A diagram showing the hemostatic valve filled with blood.

[0031] Figure 6 yes Figure 5 A schematic diagram showing the hemostatic valve inserted into the interventional device.

[0032] Figure 7 and Figure 8 yes Figure 1 A schematic diagram of the preparation process of the second tube in the middle;

[0033] Figure 9 yes Figure 1 Schematic diagram of the structure of the first joint;

[0034] Figure 10 yes Figure 9 A schematic diagram of the back of the first connector;

[0035] Figure 11 yes Figure 1 Schematic diagram of the structure of the second connector;

[0036] Figure 12 yes Figure 11 A cross-sectional view of the second joint in the middle;

[0037] Figure 13 This is a schematic diagram of the structure after the second pipe is assembled with the first and second connectors;

[0038] Figure 14 This is a schematic diagram of the structure of the second tube of the hemostatic valve according to the second embodiment of the present invention after the first connector and the second connector are assembled. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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, 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.

[0040] In the description of this invention, it should be noted that, in the field of interventional medical devices, the proximal end refers to the end closer to the operator, while the distal end refers to the end farther from the operator; the axial direction refers to the direction parallel to the line connecting the center of the distal end and the center of the proximal end of the medical device, and the radial direction refers to the direction perpendicular to the axial direction. The above definitions are for ease of expression only and should not be construed as limiting the invention.

[0041] Please see Figures 1-6 According to a first embodiment of the present invention, a hemostatic valve 1 includes: a first tube 11 having a first port 111 located at its distal end and a second port 112 located at its proximal end; a second tube 12 disposed within the first tube 11, with a radial gap 10 between the first tube 11 and the second tube 12; a first connector 13, fitted at the first port 111 and used to control the opening or closing of the distal end of the second tube 12; in use, the gap 10 is connected to blood in the human body through the first connector 13; and a second connector 14, fitted at the second port 112 and used to control the opening or closing of the proximal end of the second tube 12, the gap 10 being isolated from the outside through the second connector 14.

[0042] See Figures 2 to 4 Before use, both ends of the second tube 12 are in a closed state under the action of the first connector 13 and the second connector 14, respectively. See Figure 5 and Figure 6 In the usage state, the distal end of the hemostatic valve 1 is connected to the sheath (not shown in the figure) to deliver the sheath into the blood vessel. Blood enters the gap 10 between the first tube 11 and the second tube 12 through the sheath and the first connector 13. The direction of blood filling is shown by arrow A. The blood filling the gap 10 will generate radial pressure on the outside of the second tube 12, so that the second tube 12 is still in the closed state. Figure 6 The diagram shows that when interventional device B (such as a dilator, catheter, or other interventional diagnostic and therapeutic device) passes through the hemostasis valve 1, the second connector 14 exerts radial compression on interventional device B to achieve a first seal. At the same time, the blood filling the gap 10 compresses the second tube 12, causing the second tube 12 to adhere tightly to the outer surface of the interventional device B, thereby achieving a second seal on interventional device B. Similarly, the first connector 13 will exert radial compression on interventional device B to achieve a third seal.

[0043] The hemostatic valve 1 of this embodiment achieves triple sealing through blood filling, resulting in excellent sealing performance. Furthermore, the radial gap 10 between the first tube 11 and the second tube 12 is automatically filled with autologous blood from within the blood vessel, eliminating the need for additional filling with other fluids. This makes operation simple, convenient, and highly safe. Moreover, compared to other filling fluids, blood filling within the blood vessel is dynamic, allowing the filling volume to be adjusted simultaneously with the insertion of the interventional device B. This ensures pressure balance within the hemostatic valve 1. For example, when the interventional device B is not inserted, the gap 10 is filled with blood. After insertion, the interventional device B can squeeze the blood filling portion of the gap 10 back into the blood vessel, thus ensuring pressure balance and consistency within the hemostatic valve 1. Furthermore, since the gap 10 is filled with autologous blood, the filling volume can be adjusted according to the interventional device B. Therefore, it can accommodate interventional devices B of different sizes and shapes inserted into the hemostatic valve 1, achieving a sufficient and reliable seal with high adaptability and strong compatibility.

[0044] Specifically, such as Figure 1As shown, the first tube 11 is a straight tube, which can be a cylindrical shape along the axial direction O. The material used for its fabrication can be polycarbonate, polypropylene, polyurethane, etc. The two ends of the first tube 11 are a first port 111 and a second port 112, respectively. The first port 111 and the second port 112 are connected. External threads can be provided on the tube walls at the first port 111 and the second port 112 for installation with other components. The first tube 11 may also include at least one interface 113 on its tube wall. The radial gap 10 between the first tube 11 and the second tube 12 communicates with the interface 113, allowing the gap 10 to communicate with the outside through the interface 113. This allows for operations such as air venting and heparin infusion during surgery. Additionally, grooves 114 can be provided at both ends inside the first tube 11. These grooves 114 can be used to connect with the first connector 13 or the second connector 14, thereby positioning the first connector 13 or the second connector 14 and preventing them from rotating or moving.

[0045] Combination Figure 1 , Figure 2 and Figures 5 to 8 The second tube 12, located within the first tube 11, includes a tube body 121 coaxial with the first tube 11. For example, both can be arranged axially along O, and a radial gap 10 exists between the first tube 11 and the second tube 12. The tube body 121 of the second tube 12 is typically a thin-film tube body, which can be made of ePTFE with a low surface friction coefficient. To ensure strength, it is preferably composed of multiple layers (e.g., five layers) of ePTFE film. The thin-film tube body 121 can also be composed of one or more layers of waterproof materials such as silk, non-woven fabric, PTFE, or composite materials, bonded together with a certain amount of biocompatible adhesive. The structure of the thin-film tube body 121 makes the second tube 12 highly flexible, allowing it to fit more tightly to the device under blood pressure, thus adapting to the size and shape of the device and providing a reliable seal for devices of different shapes.

[0046] To ensure the flexibility of the membrane tube 121, the surface of the membrane tube 121 may have a microporous structure, with the pore size preferably below 1 micrometer. The micropores do not penetrate the tube wall and are blind pores. Therefore, other substances can be coated or filled on the surface of the membrane or in the micropores to form a functional layer, such as forming a smooth coating to reduce resistance, or filling with anticoagulant drugs to reduce the coagulation effect, etc. These will not be listed here.

[0047] In an example preparation process of the second tube 12, multiple layers (e.g., five layers) of ePTFE film can first be rolled onto a stainless steel mandrel, and then calcined in an oven at 330 degrees Celsius for 5 minutes to obtain the desired result. Figure 7The membrane tube 121 is shown; a first ring 122 and a second ring 123 are respectively fitted onto the two ends of the membrane tube 121. The first ring 122 and the second ring 123 are rigid components, used for assembly with the first connector 13 and the second connector 14, respectively. The first ring 122 and the second ring 123 can be made of fluorinated ethylene propylene (FEP) and bonded to the opening of the membrane tube 121 by a biocompatible cyanoacrylate adhesive, or the first ring 122 and the second ring 123 can be formed on the membrane tube 121 by a welding process.

[0048] To ensure a tighter fit between the second tube 12 and the interventional device, and also to facilitate a proper seal between the first connector 13 and the second connector 14 and the second tube 12, such as... Figure 8 As shown, the middle section of the membrane tube 121 can be compressed to form a flat shape, and the flat middle section 120 extends straight along the axial direction O. The port of the second tube 12 on the proximal side can still maintain a complete tubular structure, while the port of the second tube 12 on the distal side, in order to achieve communication between the gap 10 and blood in the human body, may also include at least one mounting part 124. This mounting part 124 is no longer a complete tubular structure; it can be a tubular structure with a notch, or it can be an independently installed part. For example, see... Figure 8 In one specific embodiment of this invention, the mounting portion 124 is formed by cutting the distal end of the tube 121. After the distal end of the membrane tube 121 is flattened, the material on both sides is cut off, leaving a trapezoidal or rectangular shape. The first ring 122 at the distal end is correspondingly cut into two mounting portions 124, which are used for assembly with the first connector 13. In the above example, there are two mounting portions 124. It should be understood that the above two quantities are only used as examples and are not a limitation of the present invention. There can also be one, three, or other quantities. In addition, the mounting portion 124 can also be other shapes, as long as it has a notch relative to the complete tubular structure.

[0049] See Figure 9 and Figure 10 , combined Figure 2 , Figures 4 to 6The first connector 13 includes a first elastic body 131, on which a first incision 132 and at least one through hole 133 are provided. In use, the gap 10 communicates with the blood in the human body through the through hole 133. The first incision 132 elastically engages with the distal end of the second tube 12 to control the opening or closing of the distal end of the second tube 12. The first elastic body 131 can be made of medical silicone, or any material with good elasticity such as rubber or polyurethane elastomer with certain biocompatibility. The first incision 132 can be I-shaped, linear, or X-shaped. After the dilator, catheter, or other interventional diagnostic and therapeutic instruments pass through the incision, the first elastic body 131 tightly engages with the instrument by its own elastic force, achieving a seal on the instrument. The through-hole 133 is located on one side adjacent to the first incision 132. When the instrument passes through the first incision 132, the instrument compresses the first elastic body 131, causing the through-hole 133 on one side to be compressed as well. To ensure that the through-hole 133 is not excessively reduced or even compressed and closed by the instrument in the first incision 132, thus causing obstruction of blood flow in the relative gap 10, the through-hole 133 can be configured to retain suitable flow space even when the first incision 132 is in its maximum expansion state. For example, the opening area of ​​the through-hole 133 can be set to be larger than the maximum cross-sectional area of ​​the interventional instrument to be used. Specifically, the opening area of ​​the through-hole 133 is at least 10 mm larger than the cross-sectional area of ​​the interventional instrument. 2 Better ones are at least 30mm larger. 2 .

[0050] The first elastic body 131 may also have a slot 134. The mounting part 124 of the second tube 12 passes through the slot 134 on one side of the first cut 132 and is fixedly connected to the first connector 13. For example, the mounting part 124 passes through the slot 134 on the outside of the first cut 132 and is fixedly connected to the first connector 13. The mounting part 124 covers a part of the through hole 133. For example, to ensure that the through hole 133 is not blocked, the width of the mounting part 124 may be slightly narrower than the width of the through hole 133 to facilitate blood flow into the through hole 133. Since the mounting part 124 cannot completely close the through hole 133, but can only partially block the through hole 133, the radial gap 10 between the first tube 11 and the second tube 12 can still communicate with human blood through the through hole 133, so that blood can flow into the gap 10 through the through hole 133 or flow back to the blood vessel from the gap 10.

[0051] In one example embodiment of this invention, the mounting portion 124 includes two mounting sections formed by cutting the end of the tube body; the first elastic body 131 has two corresponding slots 134; one mounting section is inserted into one slot 134 and fixedly connected to the first connector 13, and the other mounting section is inserted into the other slot 134 and fixedly connected to the first connector 13. Preferably, the two slots 134 are symmetrically distributed relative to the first cut 132; the first connector 13 also includes two through holes 133 symmetrically distributed relative to the first cut 132, each through hole 133 being respectively disposed between the first cut 132 and a corresponding slot 134.

[0052] Specifically, the aforementioned slot 134 can be square, and the two mounting components are respectively assembled in the two slots 134 by interference fit, or respectively fixed in the two slots 134 by an adhesive with a certain biocompatibility. In order to ensure that blood can more easily enter the radial gap 10 through the through hole 133 and generate sufficient pressure to squeeze the membrane tube body, thereby achieving a seal for the dilator, catheter or other interventional diagnostic and therapeutic instruments entering the membrane tube body, the length of the long side L1 of the square slot 134 can be set to be less than the length of the short side L2 of the closest square slot 134 to the through hole 133, that is, L2>L1, and the difference between L2 and L1 is at least 1mm, preferably more than 3mm, for example, L1 is 5mm and L2 is 8mm.

[0053] The first elastic body is also provided with two protrusions 135. During the assembly process, the protrusions 135 will cooperate with the grooves 114 provided at the far end of the first tube 11 to position the first connector 13 and prevent it from rotating or moving.

[0054] See Figure 11 and Figure 10 , combined Figure 2 , Figure 3 , Figure 5 and Figure 6The second connector 14 includes a second elastic body 141 with a recessed area 142. A second incision 143 is formed at the bottom of the recessed area 142. The second incision 143 elastically engages with the proximal end of the second tube 12 to control the opening or closing of the proximal end of the second tube 12. The second incision 143 can be straight, linear, or X-shaped. After an dilator, catheter, or other interventional diagnostic or therapeutic instrument passes through this incision, the second elastic body 141 tightly engages the instrument through its own elastic force, achieving a sealed enclosure. The recessed area 142 is shaped like a duckbill, gradually approaching the second incision 143 from its proximal end to its distal end to facilitate guiding the instrument to the second incision 143. Additionally, the second elastic body 141 is provided with an annular groove 144 that is axially spaced from and surrounds the second cut 143. The proximal end of the second tube 12 passes through the second cut 143 and is fitted into the annular groove 144 to achieve a sealed and fixed connection between the second tube 12 and the second elastic body 141.

[0055] See Figure 13 This illustration shows a schematic diagram of the structure after the first elastic body 131 and the second elastic body 141 are assembled with the second tube 12 in an example embodiment of this invention. The first cut 132 on the first elastic body 131 and the second cut 143 on the second elastic body 141 are both linearly arranged. The middle section of the second tube 12 is initially flat, and the first cut 132 and the second cut 143 respectively engage the distal and proximal ends of this flat middle section 120, achieving a seal on the second tube 12. The mounting portion 124 of the second tube 12 forms a notch relative to the complete circular tube. Therefore, when the mounting portion 124 is fixedly connected to the first connector 13, it will not completely cover the through hole 133 on the first connector 13, ensuring the communication between the radial gap 10 and human blood. The other end of the second tube 12 relative to the mounting portion 124 is a complete circular tube structure, which is sealed and fixedly connected to the second connector 14.

[0056] See Figure 1 The hemostatic valve 1 also includes a first fitting 15 and a second fitting 16; a first connector 13 is embedded between the first tube 11 and the second tube 12 at the first opening 111, and the first fitting 15 is detachably fitted onto the first tube 11 at the first opening 111; a second connector 14 is embedded between the first tube 11 and the second tube 12 at the second opening 112, and the second fitting 16 is detachably fitted onto the first tube 11 at the second opening 112. For example, the first fitting 15 and the second fitting 16 can be made of polycarbonate, or polypropylene, polyurethane, etc.; and can be detachably connected to the first tube 11 by external threads provided on the tube walls at the first opening 111 and the second opening 112, respectively, or can be connected to the first tube 11 by adhesive.

[0057] By providing the first fitting 15 and the second fitting 16, the hemostatic valve 1 can be used in conjunction with a sheath or other components. For example, the first fitting 15 can be connected to the sheath, for example, by heat bonding or adhesive bonding. Furthermore, the first fitting 15 and the second fitting 16 can also, together with the first tube 11, compress the first connector 13 and the second connector 14 inside the first tube 11. This achieves a seal between the first tube 11, the first connector 13, and the first fitting 15, and between the first tube 11, the second connector 14, and the second fitting 16, reliably isolating the radial gap 10 from the outside. It also enhances the compression of the inserted instrument by the first elastic body 131 and the second elastic body 141, improving the sealing effect on the instrument.

[0058] In use, the hemostatic valve 1 of this embodiment, firstly, refers to... Figure 2 The two ends of the membrane tube 121 of the second tube 12 are closed under the compression of the first cut 132 of the first connector 13 and the second cut 143 of the second connector 14, respectively. Then, refer to... Figure 5 The sheath connected to the first fitting 15 of the hemostatic valve 1 is inserted into the blood vessel. Blood enters the radial gap 10 between the first tube 11 and the second tube 12 through the through hole 133 on the first connector 13, generating radial pressure on the outside of the membrane tube 121, keeping the membrane tube 121 in a closed state. Next, refer to... Figure 6 The interventional device passes through the hemostatic valve 1 through the second incision 143 and the first incision 132 respectively. The first elastic body 131 and the second elastic body 141 will exert radial compression on the interventional device to achieve double sealing. At the same time, the autologous blood in the radial gap 10 will compress the membrane tube 121, causing the membrane tube 121 to wrap around and tightly adhere to the outer surface of the interventional device, thereby achieving a third seal of the interventional device by the membrane tube 121.

[0059] See Figure 14Compared to the first embodiment, the difference in the hemostatic valve 1 according to the second embodiment of the present invention is that the other end of the second tube 12 is twisted relative to one end of the second tube 12, that is, the flat section 120 of the second tube 12 no longer extends straight along the axial direction O, but is twisted around the axial direction O. Specifically, through the above-mentioned twisting, the middle flat section 120 of the membrane tube body 121 of the second tube 12 is in a twisted state, which can further increase the adhesion of the membrane tube body 121 to the instrument in conjunction with the blood, thereby further improving the sealing performance. For example, the relative rotation angle between the linear first incision 132 and the linear second incision 143 can be set to characterize the twisted state. The relative rotation angle can be 60°, 90°, or 180°, preferably greater than 180°, and more preferably greater than 360°. When the above-mentioned rotation angle is 180°, it indicates that the two incisions have rotated half a turn relative to each other, and when the rotation angle is 360°, it indicates that the two incisions have rotated one turn relative to each other. It should be understood that the above-mentioned rotation angle is only used as an example and is not a limitation of the present invention. Those skilled in the art can choose any other suitable rotation angle based on the concept of the present invention. As long as the rotation angle is greater than 0°, it indicates that there is twisting in the middle section of the second tube 12.

[0060] In another example embodiment, on the same projection plane perpendicular to the axial direction O of the second tube 12, the projection of the first incision 132 intersects with the projection of the second incision 143. That is, the first incision 132 and the second incision 143 are no longer parallel, but intersect at an angle. This intersection angle is sufficient to prevent the first incision 132 and the second incision 143 from being parallel. By setting the two incisions to have an intersection angle, the inserted interventional device can be sealed from different directions at the two incisions, further improving the sealing effect.

[0061] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0062] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features of the invention herein.

Claims

1. A hemostatic valve, characterized in that, include: The first pipe has a first and a second opening; A second tube is disposed inside the first tube, and there is a radial gap between the first tube and the second tube; A first connector is fitted at the first tube opening and is used to control the opening or closing of the second tube; the first connector includes a first elastic body, on which a first slit and at least one through hole are provided; in use, the gap communicates with blood in the human body through the through hole of the first connector; the first slit elastically engages with the second tube to control the opening or closing of the second tube. as well as The second connector is fitted at the second pipe opening and is used to control the opening or closing of the second pipe. The gap is isolated from the outside through the second connector. The second connector includes a second elastic body with a recessed area. A second cut is formed at the bottom of the recessed area. The second cut elastically engages with the second pipe to control the opening or closing of the second pipe.

2. The hemostatic valve according to claim 1, characterized in that, The first elastic body is also provided with a slot; the second tube includes a tube body and at least one mounting part connected to one end of the tube body, the first cut elastically engages with the tube body, and the mounting part passes through the slot on one side of the first cut and is fixedly connected to the first connector.

3. The hemostatic valve according to claim 2, characterized in that, The mounting section is formed by cutting the port of the tube body.

4. The hemostatic valve according to claim 3, characterized in that, The mounting part is inserted into the slot outside the first cut and fixedly connected to the first connector, and the mounting part covers a portion of the through hole.

5. The hemostatic valve according to claim 3 or 4, characterized in that, The mounting section includes two mounting portions formed by cutting the port of the tube body; the first elastic body has two corresponding slots; one of the mounting portions passes through one of the slots and is fixedly connected to the first connector.

6. The hemostatic valve according to claim 5, characterized in that, The two slots are symmetrically distributed relative to the first cut; the first connector also includes two through holes symmetrically distributed relative to the first cut, each through hole being disposed between the first cut and a corresponding slot.

7. The hemostatic valve according to claim 1, characterized in that, The second elastic body is also provided with an annular groove surrounding the second cut, and one end of the second tube passes through the annular groove outside the second cut and is sealed and fixedly connected to the second elastic body.

8. The hemostatic valve according to claim 1, characterized in that, The first elastic body has a linear first slit, which elastically engages with the second tube to control the opening or closing of one end of the second tube; the second elastic body has a linear second slit, which elastically engages with the second tube to control the opening or closing of the other end of the second tube.

9. The hemostatic valve according to claim 8, characterized in that, The other end of the second tube is twisted relative to one end of the second tube.

10. The hemostatic valve according to claim 9, characterized in that, On the same projection plane perpendicular to the axis of the second tube, the projection of the first cut intersects with the projection of the second cut.

11. The hemostatic valve according to claim 1, characterized in that, The hemostatic valve also includes a first fitting and a second fitting; the first connector is embedded between the first tube and the second tube at the first tube opening, and the first fitting is detachably fitted onto the first tube at the first tube opening; The second connector is embedded between the first pipe and the second pipe at the second pipe opening, and the second fitting is detachably fitted onto the first pipe at the second pipe opening.

12. The hemostatic valve according to claim 1, characterized in that, The first pipe also includes at least one interface disposed on its pipe wall, and the gap communicates with the interface.

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