CN219354043U - Hemostatic valve and delivery sheath - Google Patents

Abstract

The utility model provides a hemostatic valve and a delivery sheath. Wherein, hemostasis valve includes: the valve body is provided with a containing cavity, and the containing cavity is provided with a first communication port and a second communication port which are used for external communication; a first seal disposed within the receiving cavity, the first seal having a first slit; a second seal disposed within the receiving cavity, the second seal having a second slit, the first slit and the second slit being disposed crosswise, an external instrument being capable of passing through the first slit and the second slit to pass through the first communication port and the second communication port. The utility model solves the problem that the delivery sheath tube in the prior art cannot achieve both resistance and sealing performance.

Description

Hemostatic valve and delivery sheath

Technical Field

The utility model relates to the technical field of medical instruments, in particular to a hemostatic valve and a delivery sheath.

Background

Transcatheter interventions are widely used in a variety of cardiovascular diseases. For example, left auricle occlusion is an important treatment for preventing atrial fibrillation and stroke, and the general procedure of the operation is as follows: firstly, performing atrial septum puncture by using a puncture sheath through femoral vein, then using a delivery sheath tube containing a dilator to pass through the atrial septum along a guide wire to reach the left auricle part to establish an intravascular channel, then withdrawing the guide wire and the dilator, performing left auricle radiography by using a radiography catheter such as a pigtail tube through the delivery sheath tube under X-ray perspective, after the radiography catheter is withdrawn, conveying a delivery steel cable with an occluder to the left auricle part through a loader and the delivery sheath tube for release installation, and finally withdrawing all instruments, thereby completing the left auricle occlusion operation.

In the above operations, especially during the insertion and extraction of other instruments such as a guide wire and a dilator, venous blood easily overflows through the delivery sheath, so in order to reduce the risk of surgery, the delivery sheath should have an anti-leakage function, and it is common practice to provide an anti-leakage device such as a hemostatic valve at the proximal end of the delivery sheath to prevent the outflow of blood. Obviously, the hemostatic valve should enable the matched instrument to be inserted and pulled out more smoothly, the smaller the resistance is, the better the sealing effect is kept in the inserting and pulling-out process of the matched instrument, in addition, in general, the hemostatic valve is of a rigid structure relative to the sheath, and improper connection of the sheath and the hemostatic valve easily causes bending of the sheath and loosening of the hemostatic valve, so that the hemostatic valve also has good connection performance.

The common problems of the existing delivery sheath are: or the resistance of the matched instrument to be inserted and pulled out is large, the resistance of the matched instrument to be inserted and pulled out is inconsistent, the hand feeling of doctors is influenced, or the tightness is poor, namely the problems of the resistance, the tightness and the poor comprehensive performance cannot be achieved. This increases the risk of surgery to some extent, affecting the performance of the surgery.

Disclosure of Invention

The utility model mainly aims to provide a hemostatic valve and a delivery sheath tube, which are used for solving the problem that the delivery sheath tube in the prior art cannot achieve both resistance and sealing performance.

In order to achieve the above object, according to one aspect of the present utility model, there is provided a hemostatic valve comprising: the valve body is provided with a containing cavity, and the containing cavity is provided with a first communication port and a second communication port which are used for external communication; a first seal disposed within the receiving cavity, the first seal having a first slit; a second seal disposed within the receiving cavity, the second seal having a second slit, the first slit and the second slit being disposed crosswise, an external instrument being capable of passing through the first slit and the second slit to pass through the first communication port and the second communication port.

Further, the first seal member and the second seal member are stacked in the axial direction of the housing chamber, at least a portion of the surfaces of the first seal member and the second seal member facing each other are in contact engagement, and the first slit and the second slit are located at positions where the first seal member and the second seal member contact each other.

Further, the surfaces between the first seal and the second seal facing each other are planar; or at least one of the surfaces between the first seal and the second seal facing each other is a cambered surface, and a choke chamber for collecting exuded blood is formed between the first seal and the second seal.

Further, when at least one of the surfaces facing each other between the first seal member and the second seal member is an arc surface, the surfaces facing each other between the first seal member and the second seal member are each an arc surface.

Further, the intersection between the first slit and the second slit is located at the center of the first seal and the second seal.

Further, the hemostatic valve further comprises a positioning structure, the positioning structure comprises a positioning column and a positioning groove, the positioning column is arranged on the periphery of the first sealing piece and/or the second sealing piece, the positioning groove is arranged on the periphery of the second sealing piece and/or the first sealing piece, at least one of the first sealing piece and the second sealing piece is provided with the positioning column, at least the other one of the first sealing piece and the second sealing piece is provided with the positioning groove, and the positioning column is located in the positioning groove when the first sealing piece and the second sealing piece are overlapped.

Further, the first sealing member is close to the proximal end compared with the second sealing member, the side, away from the second sealing member, of the first sealing member is provided with a guide cavity, the guide cavity is provided with a conical structure, the inner diameter of the guide cavity gradually decreases along the direction of approaching the second sealing member, and the first slit is positioned at the tip of the conical structure; and/or the side of the second sealing piece far away from the first sealing piece is provided with a stress dispersing groove, the inner diameter of the stress dispersing groove gradually decreases along the direction approaching to the first sealing piece, and the second kerf is positioned at the tip of the stress dispersing groove.

Further, a surface of the first sealing element far away from the second sealing element and/or a surface of the second sealing element far away from the first sealing element is provided with a sealing part, and the sealing part is positioned between the first sealing element or the second sealing element and the valve body so as to seal a gap between the first sealing element or the second sealing element and the valve body; and/or one surface of the first sealing element far away from the second sealing element and/or one surface of the second sealing element far away from the first sealing element is provided with a blood containing groove which is circumferentially opened.

Further, the side wall of holding the chamber is provided with the mounting groove, and the mounting groove is close to the distal end in comparison with first sealing member and second sealing member, and the hemostasis valve still includes the mounting that is used for being connected with outside sheath pipe, and the mounting inlays to be established in the mounting groove, and the hemostasis valve still includes stress relief pipe, holds the chamber and has the linkage segment that supplies the sheath pipe to stretch into, and at least a portion of stress relief pipe sets up in linkage segment department to be located between valve body and the sheath pipe.

Further, the valve body is also provided with a third communication port, the accommodating cavity is provided with a middle section, the middle section is positioned at one side of the first sealing element and the second sealing element, which is close to the far end, and the third communication port is positioned at the side surface of the middle section and is communicated with the middle section; and/or the valve body comprises a valve seat and a valve cover, the valve seat is provided with a containing cavity, the valve cover is arranged at the proximal end of the containing cavity, the first sealing element and the second sealing element are limited in the containing cavity, and the valve cover is provided with a first communication port or a second communication port.

According to another aspect of the present utility model there is provided a delivery sheath comprising a sheath and a hemostatic valve as described above, the sheath being connected to a distal end of the hemostatic valve.

By adopting the technical scheme of the utility model, the first sealing element and the second sealing element are arranged, and the first cutting seam and the second cutting seam are respectively arranged on the first sealing element and the second sealing element, so that external instruments such as a guide wire can pass through the first cutting seam and the second cutting seam in the accommodating cavity, and pass through the accommodating cavity, thereby realizing the passing between the first communication port and the second communication port, namely the passing through the hemostatic valve. The first kerf and the second kerf are crossed, so that the influence on the size of the kerf openings when the guide wire passes through the first kerf and the second kerf can be reduced, the opening change of the first kerf and the opening change of the second kerf are smaller, the first kerf and the second kerf are close to the guide wire as much as possible, the sealing effect is guaranteed when the guide wire passes through the guide wire, and the thickness of the first sealing element and the second sealing element at the kerf can be thinner and is easy to deform, so that the friction force on the guide wire is smaller, the guide wire can be inserted and pulled out more smoothly, meanwhile, the structures of the first sealing element and the second sealing element can be identical, the friction force on the guide wire in the inserting and pulling processes is basically the same, and the hand feeling of an operator can be improved. The setting mode gives attention to the operation resistance and the tightness of the hemostatic valve, can ensure reliable sealing effect, can increase the hand feeling of operators, improves the comprehensive performance of the hemostatic valve and the conveying sheath tube, and ensures the smooth operation.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

fig. 1 is a schematic view showing the structure of a hemostatic valve according to a first embodiment of the present utility model;

FIG. 2 shows a schematic structural view of the first seal and the second seal of FIG. 1 mated;

fig. 3 shows a schematic structural view of a hemostatic valve according to a second embodiment of the present utility model.

Wherein the above figures include the following reference numerals:

10. a valve body; 11. a first communication port; 12. a second communication port; 13. a third communication port; 14. a valve seat; 15. a valve cover; 20. a first seal; 21. a first slit; 22. a choke cavity; 23. a guide chamber; 24. a sealing part; 25. a blood vessel; 30. a second seal; 31. a second slit; 32. a stress dispersion groove; 40. a positioning structure; 41. positioning columns; 42. a positioning groove; 50. a fixing member; 60. a stress dissipating tube; 70. a sheath.

Detailed Description

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The utility model will be described in detail below with reference to the drawings in connection with embodiments.

It is noted that all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs unless otherwise indicated.

In the present utility model, unless otherwise indicated, terms of orientation such as "upper, lower, top, bottom" are used generally with respect to the orientation shown in the drawings or with respect to the component itself in the vertical, upright or gravitational direction; also, for ease of understanding and description, "inner and outer" refers to inner and outer relative to the profile of each component itself, but the above-mentioned orientation terms are not intended to limit the present utility model.

The utility model provides a hemostatic valve and a delivery sheath tube, which aim to solve the problem that the delivery sheath tube in the prior art cannot achieve both resistance and sealing performance.

Example 1

A hemostatic valve as shown in fig. 1 and 2, comprising a valve body 10, a first seal member 20 and a second seal member 30, the valve body 10 having a housing chamber having a first communication port 11 and a second communication port 12 for communicating with the outside; a first seal 20 is arranged in the receiving chamber, the first seal 20 having a first slit 21; a second seal 30 is provided in the receiving chamber, the second seal 30 having a second slit 31, the first slit 21 and the second slit 31 being disposed crosswise, an external instrument being able to pass through the first slit 21 and the second slit 31 to pass through the first communication port 11 and the second communication port 12.

In this embodiment, the first sealing member 20 and the second sealing member 30 are provided, and the first lancing 21 and the second lancing 31 are respectively provided on the first sealing member and the second sealing member, so that an external instrument such as a guide wire can pass through the first lancing 21 and the second lancing 31 in the accommodating cavity, thereby passing through the accommodating cavity, and passing through the hemostatic valve between the first communication port 11 and the second communication port 12. Since the first slit 21 and the second slit 31 are formed in a crossing manner, on one hand, the influence on the size of the slit opening when the guide wire passes through the first slit 21 and the second slit 31 can be reduced, the opening of the first slit 21 and the opening of the second slit 31 are changed slightly and are close to the guide wire as much as possible, so that the sealing effect is ensured while the guide wire passes through, on the other hand, the thickness of the first sealing element 20 and the second sealing element 30 at the slit can be thinner and is easy to deform, the friction force on the guide wire is smaller, the guide wire can be inserted and pulled out more smoothly, meanwhile, the structures of the first sealing element 20 and the second sealing element 30 can be the same, the friction force born by the guide wire in the inserting and pulling processes is basically the same, and the hand feeling of an operator can be increased. The setting mode gives attention to the operation resistance and the tightness of the hemostatic valve, can ensure reliable sealing effect, can increase the hand feeling of operators, improves the comprehensive performance of the hemostatic valve and the conveying sheath tube, and ensures the smooth operation.

The above-mentioned intersecting arrangement between the first slit 21 and the second slit 31 means that the first slit 21 and the second slit 31 intersect each other in a projection parallel to the axial direction of the hemostatic valve, so that an X-like form is formed, and the guide wire generally passes through the intersection when passing through the slit. This embodiment will be described using an external device as an example of a guide wire. Meanwhile, since the hemostatic valve has a proximal end and a distal end, the present embodiment is described by taking the example that the first communication port 11 is located at the proximal end of the hemostatic valve and the second communication port 12 is located at the distal end of the hemostatic valve, and the first sealing member 20 is located closer to the proximal end than the second sealing member 30.

In order to ensure the sealing effect, the first seal member 20 and the second seal member 30 of the present embodiment are each made of an elastic member, more specifically, a member having a certain elasticity such as silicone rubber, TPU, natural rubber, or the like, and preferably a silicone rubber member. In this way, the first slit 21 and the second slit 31 may have a tendency to close automatically by the nature of the material itself, thereby enabling the edges of the first slit 21 and the second slit 31 to mate with the guidewire as it passes therethrough.

In the present embodiment, the accommodating chamber is provided in a channel structure penetrating in the axial direction of the hemostatic valve, both ends of which are respectively communicated with the outside as the first communicating port 11 and the second communicating port 12, and the first seal member 20 and the second seal member 30 are installed and accommodated in the accommodating chamber, and the first seal member 20 and the second seal member 30 are stacked in the axial direction of the accommodating chamber, and the axes of both are arranged to coincide with the axis of the accommodating chamber. Meanwhile, in order to ensure the sealing effect, the present embodiment makes the surfaces of the first sealing member 20 and the second sealing member 30 facing each other, that is, at least a portion of the contact fit between the surfaces of the first sealing member 20 facing the second sealing member 30 and the surfaces of the second sealing member 30 facing the first sealing member 20, and the first slit 21 and the second slit 31 are disposed at the positions where the first sealing member 20 and the second sealing member 30 contact each other, so that the fit of the first slit 21 and the second slit 31 is tighter, and the portions of the first slit 21 and the second slit 31 can be closely adhered to the guide wire under the self elastic force when the guide wire passes through the first slit 21 and the second slit 31, thereby ensuring the sealing effect.

In this embodiment, the surfaces of the first seal member 20 and the second seal member 30 facing each other are planar, so that the entire surfaces of the first seal member 20 and the second seal member 30 can be in contact with each other, thereby ensuring the sealing performance, simplifying the structure, and reducing the complexity of the structure.

Preferably, the intersection between the first slit 21 and the second slit 31 is located at the center of the first seal member 20 and the second seal member 30, and the present embodiment locates the first slit 21 at the center of the first seal member 20 and the second slit 31 at the center of the second seal member 30, which can facilitate both processing and threading the guide wire through the centers into the first slit 21 and the second slit 31.

Alternatively, the first slit 21 and/or the second slit 31 may be linear or curved, and the specific shapes of the first slit 21 and the second slit 31 may be configured as a straight slit, an S-shaped slit, a C-shaped slit, or any other shape, which is illustrated in this embodiment.

Preferably, the first slit 21 and the second slit 31 form one of 30 °, 45 °, 60 ° or 90 ° angles therebetween, which has better sealing performance and more approximate resistance.

In the present embodiment, the first seal member 20 and the second seal member 30 are of a sheet structure, which has a certain thickness, but are not thick due to the two-layer structure. In this embodiment, one of the side of the first sealing member 20 facing the second sealing member 30 and the side of the second sealing member 30 facing the first sealing member 20 has a protrusion, and the other has a groove, so that when the two members are butt-mounted, the protrusion is located in the groove, and the contact surface of the first sealing member 20 and the second sealing member 30 is not a plane, but has a certain bending shape with a cross section, so that the sealing effect between the two members is enhanced.

In the present embodiment, the hemostatic valve further includes a positioning structure 40, and the positioning structure 40 may be a portion provided on a projection or a groove, but in consideration of the fact that the thickness of the first seal member 20 and the second seal member 30 themselves is not so thick, the positioning structure 40 of the present embodiment includes a positioning post 41 and a positioning groove 42 in order to avoid influence on the components, wherein the positioning post 41 is provided on the circumferential side of the first seal member 20 and/or the second seal member 30 and extends a distance in the axial direction, the positioning groove 42 is provided on the circumferential side of the second seal member 30 and/or the first seal member 20, and at least one of the first seal member 20 and the second seal member 30 is provided with the positioning post 41, and at least the other is provided with the positioning groove 42. The number, specific positions, etc. of the positioning posts 41 and the positioning grooves 42 can be adjusted as required, so long as the two are ensured to cooperate to realize circumferential positioning when the first sealing element 20 and the second sealing element 30 are installed. Preferably, the positioning column 41 and the corresponding sealing element are integrally formed, so that the structural strength can be ensured, and the generation of gaps can be reduced.

The present embodiment is provided with the positioning posts 41 and the positioning grooves 42 simultaneously on the first seal member 20, and the positioning posts 41 and the positioning grooves 42 are alternately arranged in sequence in the circumferential direction of the first seal member 20, and similarly, the positioning posts 41 and the positioning grooves 42 are also provided simultaneously on the second seal member 30, and the positioning posts 41 and the positioning grooves 42 on the first seal member 20 are alternately arranged in sequence in the circumferential direction of the second seal member 30, and the positioning posts 41 and the positioning grooves 42 are respectively engaged with the positioning grooves 42 and the positioning posts 41 on the second seal member 30 in one-to-one correspondence, that is, the positioning posts 41 are positioned in the positioning grooves 42 when the first seal member 20 and the second seal member 30 are stacked and assembled together, thereby achieving the positioning effect. Further, in this embodiment, two positioning columns 41 and two positioning grooves 42 are respectively disposed on each sealing member, and the two positioning columns 41 are circumferentially symmetrically disposed, and the two positioning grooves 42 are also circumferentially symmetrically disposed, and a circumferential interval between the positioning columns 41 and the positioning grooves 42 is 90 degrees. Of course, the specific arrangement is not limited to the above arrangement.

In the present embodiment, the side of the first sealing member 20 away from the second sealing member 30 has a guide cavity 23, the guide cavity 23 has a tapered structure, and the inner diameter of the guide cavity 23 gradually decreases in size in the direction approaching the second sealing member 30, that is, the inner diameter of the tapered structure gradually decreases in size in the direction from the proximal end toward the distal end, that is, the opening gradually decreases in size, forming a flare shape, and the first slit 21 is located at the tip of the tapered structure, that is, at the end of the guide cavity 23 approaching the distal end. In this way, the guide lumen 23 can guide the guide wire, ensuring that the guide wire can pass smoothly through the first slit 21.

In the present embodiment, the second seal member 30 has a stress relief groove 32 on a side thereof remote from the first seal member 20, and the inner diameter of the stress relief groove 32 gradually decreases in size in a direction approaching the first seal member 20. The stress dispersion groove 32 is substantially identical to the guide cavity 23 in shape, and is different in arrangement direction, the opening of the guide cavity 23 faces the proximal end, and the opening of the stress dispersion groove 32 faces the distal end, that is, the tips of the two faces are opposite to each other, and at the same time, the functions of the guide cavity 23 are also different, the function of the guide cavity 23 is to guide the guide wire, and the function of the stress dispersion groove 32 is to act in the stress dispersion groove 32 when blood enters the accommodating cavity from the second communication port 12 to impinge on the second sealing member 30, and the impact force is dispersed under the action of the inner wall inclined surface of the stress dispersion groove 32, so that the effect of reducing the impact force is achieved. But the structure of both the guide chamber 23 and the stress relief groove 32 is substantially identical in structure.

In the present embodiment, the side of the first seal member 20 away from the second seal member 30 and/or the side of the second seal member 30 away from the first seal member 20 has the seal portion 24, and the seal portion 24 is located between the first seal member 20 or the second seal member 30 and the valve body 10 to seal the gap between the first seal member 20 or the second seal member 30 and the valve body 10; and/or the side of the first sealing member 20 away from the second sealing member 30 and/or the side of the second sealing member 30 away from the first sealing member 20 is provided with a blood containing groove 25 which is circumferentially opened. In this embodiment, the sealing portion 24 and the blood vessel 25 are provided on both the proximal-facing surface of the first sealing member 20 and the distal-facing surface of the second sealing member 30, and the sealing portion 24 and the blood vessel 25 form a concave-convex structure. The sealing part 24 is a bulge, the sealing effect is realized by tightly matching with the valve body 10, the blood containing groove 25 is a concave part, the blood containing groove is matched with the valve body 10 to form a part of blood supply liquid exudation of the cavity part, the blood containing groove and the valve body can play a role in preventing blood flow from exuding along the cavity wall, and the matching of the blood containing groove and the valve body can enhance the seepage prevention effect and ensure the sealing performance. In order to ensure the sealing performance of the whole circumference, the sealing part 24 and the blood containing groove 25 of the embodiment are arranged along the circumference of the corresponding sealing piece to form a ring shape, the number of the ring-shaped sealing parts can be selected according to the requirement, and one or more rings can be arranged, so that the whole circumference is sealed in a seepage-proof way, and the sealing effect is ensured.

The above-mentioned positioning structure 40, the guiding cavity 23, the stress dispersing groove 32, the sealing portion 24, and the blood vessel 25 are arranged in the same manner, so that the first sealing member 20 and the second sealing clip are basically identical in structure, on one hand, the friction force applied to the guide wire during insertion and extraction is ensured to be almost identical, so that an operator has good operation hand feeling, and on the other hand, the guide wire and the guide wire can be used as the same part and can be processed through a die during processing, thereby reducing the die cost. Of course, the structures of the first seal member 20 and the second seal member 30 may not be identical, and may have partial structural differences.

The accommodating cavity of the embodiment comprises a plurality of axial segments, and specifically comprises a large-diameter segment, a middle-diameter segment and a small-diameter segment which are sequentially connected from a proximal end to a distal end, wherein the first sealing element 20 and the second sealing element 30 are arranged in the large-diameter segment and are tightly matched with the inner wall surface of the large-diameter segment so as to ensure the sealing effect. The sealing part 24 and the blood containing groove 25 are matched with two end surfaces of the large-diameter section, so that the anti-seepage sealing effect is realized. The shape of the large diameter section, the middle diameter section and the small diameter section can be set according to the needs, and the embodiment adopts a cylindrical structure, and also can adopt structures such as T shapes, I shapes and the like.

In this embodiment, the side wall of the receiving cavity is provided with a mounting groove, which is located closer to the distal end than the first seal member 20 and the second seal member 30, i.e. on the side of the second seal member 30 closer to the distal end, i.e. on the minor diameter section. Meanwhile, the hemostatic valve further includes a fixing member 50 for connection with the external sheath 70, the fixing member 50 being embedded in the installation groove, so that the hemostatic valve and the sheath 70 can be connected together through the fixing member 50. The fixing member 50 and the valve body 10 may be connected by injection molding or ultrasonic welding. Since the fixing member 50 is only required to reliably connect the sheath 70, the shape thereof is not particularly required as long as it is adapted to the sheath 70. The fixing member 50 of this embodiment adopts a circular ring structure, and has a ring groove formed on its outer peripheral side so as to be tightly fitted with the annular protrusion in the mounting groove, and of course, the shape is not limited to the arrangement of this embodiment, and only needs to be consistent with the shape of the mounting groove, and may be regular cylindrical, T-shaped, i-shaped, etc., and the material may be made of PP, PE, PA, etc.

In this embodiment, the mounting groove is spaced from the second communication port 12 by a certain distance, so that a certain distance is left between the fixing member 50 and the second communication port 12, and the distance is a connection section for the sheath tube 70 to extend into, the connection section and the section where the mounting groove is located are used together as a small-diameter section, and the proximal end of the sheath tube 70 can extend into the connection section and be connected with the fixing member 50. Meanwhile, the hemostatic valve of the present embodiment further includes a stress dissipating tube 60, at least a portion of the stress dissipating tube 60 is disposed at the connecting section and located between the valve body 10 and the sheath 70, so as to prevent bending of the proximal end of the sheath 70 during use. The shape of the stress dispersing tube 60 may be set according to the shape of the sheath tube 70, and the present embodiment is configured as a cylindrical structure, and one end of the stress dispersing tube 60 extends out of the second communication port 12 by a distance, so as to ensure the bending preventing effect. The material of the stress-dissipating tube 60 may be PU, PE, or other materials.

When the sheath 70 is mounted, the fixing member 50 can be mounted on the proximal end of the sheath 70 by at least one of bonding, interference fit, plastic coating/secondary injection molding and ultrasonic welding, the stress dispersing tube 60 is sleeved on the proximal end of the sheath 70 and is abutted with the end part of the stress dispersing tube 60 and the fixing member 50, and then the valve body 10 of the hemostatic valve is molded/secondary injection molded on the sheath 70, so that the mounting processing of the part is realized.

In this embodiment, the valve body 10 further has a third communication port 13, the accommodating cavity has an intermediate section, which is the intermediate section described above, and the intermediate section is located on a side of the first seal member 20 and the second seal member 30 near the distal end, that is, on a side of the second seal member 30 near the distal end, to perform an intermediate transition function, and a smooth transition section can be further provided between the intermediate section and the large-diameter section and the small-diameter section as required. The present embodiment provides a transition section between the intermediate and minor diameter sections for guiding the auxiliary instrument and securing a portion of the instrument, such as the loader. The third communication port 13 in this embodiment is located at the side of the middle section and is communicated with the middle section to perform the bypass function, and the third communication port 13 can be connected with a three-way valve for emptying, pressure measurement, liquid injection and the like.

In this embodiment, the valve body 10 includes the valve seat 14 and the valve cover 15, the valve seat 14 is the main part of the valve body 10, the valve seat 14 has the accommodation cavity, the first sealing member 20, the second sealing member 30, the fixing member 50, etc. are all installed in the valve body 10, and the valve cover 15 covers and establishes in the proximal end of the accommodation cavity, the valve cover 15 has the first communicating opening 11 as the one end opening of the accommodation cavity, the size of the first communicating opening 11 is basically the same as the opening size of the guiding cavity 23, the end surface of the first sealing member 20 far away from the second sealing member 30 is abutted on the inner end surface of the valve cover 15, in order to guarantee the cooperation with the sealing portion 24 and the blood accommodating groove 25 on the first sealing member 20, this embodiment is provided with the protruding portion on the inner end surface of the valve cover 15, the protruding portion cooperates with the sealing portion 24 and the blood accommodating groove 25, thus realizing the anti-seepage effect, thus realizing the installation of the first sealing member 20 and the second sealing member 30 limited in the accommodation cavity by the abutment of the valve cover 15 against the first sealing member 20.

The present embodiment further provides a delivery sheath, which includes the sheath 70 and the hemostasis valve, wherein the sheath 70 is connected to the distal end of the hemostasis valve, and the specific matching manner between the sheath 70 and the hemostasis valve is as described above, which is not described herein.

Example two

The difference from the first embodiment is that the surfaces of the first seal 20 and the second seal 30 facing each other are mated differently.

As shown in fig. 3, in the present embodiment, at least one of the surfaces facing each other between the first seal member 20 and the second seal member 30 is an arc surface, and preferably the surfaces facing each other between the first seal member 20 and the second seal member 30 are each an arc surface, more specifically, a spherical arc surface, and the protruding ends of the spherical arc surfaces are brought into close contact with each other relatively to form point contact, the first slit 21 and the second slit 31 are provided at the contact points of both, thereby securing the sealing effect of both. And a choke chamber 22 is formed at a portion of the first seal member 20 which is not closely contacted with the second seal member 30, i.e., a region other than the point contact, the choke chamber 22 is used for collecting exuded blood, when the blood is exuded from the second slit 31, the choke chamber 22 is capable of collecting exuded blood and reducing blood pressure to reduce impact to the first seal member 20, in addition, friction force generated between the auxiliary instrument and the second seal member 30 at the time of entry causes the degree of protrusion of the spherical surface to be reduced, so that the degree of protrusion of the spherical surface to be reduced at the time of withdrawal of the auxiliary instrument and the first seal member 20 is increased, so that the extrusion of the first slit 21 is increased to increase the tightness, thus ensuring sealing effect of the auxiliary instrument at the time of insertion and withdrawal, and the spherical structure prevents the valve plate from being everted. Of course, it is also possible to provide only one of the surfaces of the first seal member 20 and the second seal member 30 facing each other with an arc surface and the other surface with a flat surface, so that the above-described technical effects can be basically achieved.

It should be noted that, in the above embodiments, a plurality refers to at least two.

From the above description, it can be seen that the above embodiments of the present utility model achieve the following technical effects:

1. the problem that the resistance and the tightness of the conveying sheath tube in the prior art cannot be considered is solved;

2. the operation resistance and the tightness of the hemostatic valve are both considered, so that the reliable sealing effect can be ensured, the hand feeling of an operator can be increased, the comprehensive performance of the hemostatic valve and the conveying sheath tube is improved, and the smooth operation is ensured;

3. the inner wall inclined surface of the stress dispersing groove disperses the impact force of the blood on the second sealing element, so that the effect of reducing the impact force is realized;

4. the sealing part and the blood containing groove can realize the whole circumferential seepage-proof sealing, and the sealing effect is ensured;

5. the structures of the first sealing element and the second sealing clamp are basically identical, so that the friction forces born by the guide wire during insertion and extraction are almost identical, an operator has good operation handfeel, the processing is convenient, and the die cost is reduced;

6. the fixing piece and the stress dispersing tube can realize the fixing and bending preventing effects of the sheath tube;

7. the cambered surface cooperation of first sealing member and second sealing member can enough reduce blood pressure in order to reduce the impact to first sealing member, can guarantee the sealed effect of auxiliary instrument when inserting and withdrawing again.

It will be apparent that the embodiments described above are merely some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the present application described herein may be implemented in sequences other than those illustrated or described herein.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (11)

1. A hemostatic valve, comprising:

a valve body (10), the valve body (10) having a housing chamber having a first communication port (11) and a second communication port (12) for communicating with the outside;

-a first seal (20), the first seal (20) being arranged within the receiving cavity, the first seal (20) having a first slit (21);

-a second seal (30), the second seal (30) being arranged in the receiving cavity, the second seal (30) having a second slit (31), the first slit (21) and the second slit (31) being arranged crosswise, an external instrument being able to pass through the first slit (21) and the second slit (31) to pass through the first communication port (11) and the second communication port (12).

2. The hemostatic valve according to claim 1, wherein the first seal (20) and the second seal (30) are stacked in an axial direction of the accommodating chamber, at least a portion of surfaces facing each other between the first seal (20) and the second seal (30) are in contact engagement, and the first slit (21) and the second slit (31) are located at a position where the first seal (20) and the second seal (30) are in contact with each other.

3. A haemostatic valve according to claim 2, wherein,

the surfaces facing each other between the first seal (20) and the second seal (30) are planar; or alternatively

At least one of the surfaces of the first seal (20) and the second seal (30) facing each other is cambered, and a choke chamber (22) for collecting exuded blood is formed between the first seal (20) and the second seal (30).

4. A haemostatic valve according to claim 3, wherein when at least one of the surfaces facing each other between the first seal (20) and the second seal (30) is a cambered surface, the surfaces facing each other between the first seal (20) and the second seal (30) are cambered surfaces.

5. The hemostatic valve according to claim 2, wherein the intersection between the first slit (21) and the second slit (31) is located at the center of the first seal (20) and the second seal (30).

6. The hemostatic valve according to claim 1, further comprising a positioning structure (40), the positioning structure (40) comprising a positioning post (41) and a positioning groove (42), the positioning post (41) being provided on a circumferential side of the first seal (20) and/or the second seal (30), the positioning groove (42) being provided on a circumferential side of the second seal (30) and/or the first seal (20), and at least one of the first seal (20) and the second seal (30) being provided with the positioning post (41), at least the other one being provided with the positioning groove (42), the positioning post (41) being located within the positioning groove (42) when the first seal (20) and the second seal (30) are stacked.

7. The hemostatic valve according to claim 1, wherein the first seal (20) is proximal to the second seal (30),

-the side of the first seal (20) facing away from the second seal (30) has a guiding cavity (23), the guiding cavity (23) having a conical configuration and the guiding cavity (23) having an inner diameter that decreases gradually in a direction towards the second seal (30), the first slit (21) being located at the tip of the conical configuration; and/or

The second sealing member (30) is provided with a stress relief groove (32) on the surface far away from the first sealing member (20), the inner diameter of the stress relief groove (32) gradually decreases along the direction approaching the first sealing member (20), and the second cutting seam (31) is positioned at the tip of the stress relief groove (32).

8. The hemostatic valve according to claim 1, wherein the hemostatic valve is configured to,

a face of the first seal (20) remote from the second seal (30) and/or a face of the second seal (30) remote from the first seal (20) has a sealing portion (24), the sealing portion (24) being located between the first seal (20) or the second seal (30) and the valve body (10) to seal a gap between the first seal (20) or the second seal (30) and the valve body (10); and/or

One side of the first sealing element (20) far away from the second sealing element (30) and/or one side of the second sealing element (30) far away from the first sealing element (20) is provided with a blood containing groove (25) which is circumferentially opened.

9. The hemostatic valve according to any one of claims 1 to 8, wherein a side wall of the receiving cavity is provided with a mounting groove closer to a distal end than the first seal (20) and the second seal (30), the hemostatic valve further comprising a fixture (50) for connection with an external sheath (70), the fixture (50) being embedded in the mounting groove, the hemostatic valve further comprising a stress relief tube (60), the receiving cavity having a connection section into which the sheath (70) extends, at least a portion of the stress relief tube (60) being provided at the connection section and being located between the valve body (10) and the sheath (70).

10. The hemostatic valve according to any one of claims 1-8,

the valve body (10) is also provided with a third communication port (13), the accommodating cavity is provided with a middle section, the middle section is positioned at one side of the first sealing element (20) and the second sealing element (30) close to the far end, and the third communication port (13) is positioned at the side surface of the middle section and is communicated with the middle section; and/or

The valve body (10) comprises a valve seat (14) and a valve cover (15), the valve seat (14) is provided with the accommodating cavity, the valve cover (15) is arranged at the proximal end of the accommodating cavity in a covering mode, the first sealing piece (20) and the second sealing piece (30) are limited in the accommodating cavity, and the valve cover (15) is provided with the first communication port (11) or the second communication port (12).

11. A delivery sheath comprising a sheath (70) and the hemostatic valve of any one of claims 1-10, the sheath (70) being connected to a distal end of the hemostatic valve.