阅读说明：本技术 一种止血阀 (Hemostatic valve ) 是由 李世文 韩建超 胡文忠 丁双喜 于 2020-12-15 设计创作，主要内容包括：本发明公开了一种止血阀,属于介入医疗技术领域。它包括第一密封阀片、第二密封阀片、压环、阀盖和阀座组成；所述第一密封阀片是由上圆台、方片和下圆台连接而成,第一密封阀片设有贯穿上圆台、方片和下圆台的第一切缝,第一切缝中部设有上大下小的锥型通孔；所述第二密封阀片至少设有一道贯穿的第二切缝；所述阀座上端从上到下依次设有第一密封阀片、第二密封阀片,压环下端与阀座连接,将下圆台、第二密封阀片与阀座上端面压紧密封,阀盖与压环上部连接,将上圆台与压环上端压紧密封。在分别插入大尺寸器械和小尺寸器械时,都具有良好的密封效果,减少手术中患者溢血的风险；第二切缝倾斜开设,在内部正压条件下也能保持密封效果。(The invention discloses a hemostatic valve, and belongs to the technical field of interventional medical treatment. The valve comprises a first sealing valve plate, a second sealing valve plate, a pressure ring, a valve cover and a valve seat; the first sealing valve plate is formed by connecting an upper round table, a square sheet and a lower round table, a first cutting seam penetrating through the upper round table, the square sheet and the lower round table is arranged on the first sealing valve plate, and a conical through hole with a large upper part and a small lower part is arranged in the middle of the first cutting seam; the second sealing valve plate is at least provided with a second penetrating kerf; the upper end of the valve seat is sequentially provided with a first sealing valve plate and a second sealing valve plate from top to bottom, the lower end of the compression ring is connected with the valve seat, the lower round platform and the second sealing valve plate are tightly pressed and sealed with the upper end face of the valve seat, the valve cover is connected with the upper portion of the compression ring, and the upper round platform and the upper end of the compression ring are tightly pressed and sealed. When a large-size instrument and a small-size instrument are respectively inserted, the sealing device has good sealing effect, and the risk of bleeding of a patient in an operation is reduced; the second cutting seam is obliquely arranged, and the sealing effect can be kept under the condition of internal positive pressure.)

1. A hemostatic valve is characterized by comprising a first sealing valve plate, a second sealing valve plate, a pressure ring, a valve cover and a valve seat;

the first sealing valve plate is of an elastic I-shaped structure and is formed by connecting an upper round table at the top, a square sheet at the middle part and a lower round table at the bottom, a first cutting seam penetrating through the upper round table, the square sheet and the lower round table is arranged on the first sealing valve plate, and a conical through hole with a large upper part and a small lower part is arranged in the middle of the first cutting seam;

the second sealing valve plate is of an elastic round table structure, and at least one penetrating second cutting seam is arranged on the second sealing valve plate;

the compression ring is of a hollow annular structure;

the valve cover is a hollow cover body;

the upper end of the valve seat is sequentially provided with a first sealing valve plate and a second sealing valve plate from top to bottom, the lower end of the compression ring is connected with the valve seat, the lower round platform and the second sealing valve plate are tightly pressed and sealed with the upper end face of the valve seat, the valve cover is connected with the upper portion of the compression ring, and the upper round platform and the upper end of the compression ring are tightly pressed and sealed.

2. The hemostasis valve of claim 1, wherein a plurality of vertical ribs are arranged on the inner wall of the lower portion of the compression ring, and the lower round platform of the first sealing valve plate, the second sealing valve plate and the upper end of the valve seat are pressed tightly through the vertical ribs.

3. The hemostatic valve according to claim 1, wherein a ring of retaining ring is disposed on the inner wall of the upper portion of the pressure ring, a ring of ribs is disposed on the upper surface of the retaining ring, and the valve cover presses the upper round platform of the first sealing valve plate against the retaining ring.

4. The hemostatic valve according to claim 1, wherein the first sealing plate and the second sealing plate are connected in an integral structure.

5. The hemostatic valve according to claim 1, wherein the cut surface of the second slit is non-perpendicular to the upper and lower end surfaces of the second sealing plate.

Technical Field

The invention relates to a hemostatic valve, and belongs to the technical field of interventional medical treatment.

Background

When an interventional therapy is clinically carried out, a sheath is usually used for establishing an intravascular channel so as to facilitate the insertion and extraction of other medical instruments. During these insertion and extraction processes, blood easily overflows from the body, and external air and bacteria easily enter the body, thereby increasing the risk of surgery. Thus, a hemostatic valve is typically fitted at the end of the sheath to prevent the egress of blood, as well as the ingress of air and bacteria.

Devices for accessing the sheath typically have small size devices (e.g., guide wires, microcatheters, ranging in diameter from 0.46 to 0.97mm) and large size devices (e.g., aspiration catheters, stent delivery lines, ranging in diameter from 2 to 8 mm). The maximum diameter difference of the instruments used in the same operation can reach more than 5 mm. The current clinical hemostatic valves mainly adopt a flexible sealing sheet structure for dynamic sealing of instrument insertion. The hemostatic sealing device has a good hemostatic sealing effect on hemostasis when a large-size device is inserted, and has certain challenges on hemostasis sealing of a small-size device.

Therefore, the invention designs a hemostatic valve device which can adapt to instruments with different sizes to enter a sheath tube, keeps good sealing performance and can also keep sealing effect under the condition of internal positive pressure.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the hemostatic valve solves the problem that the sheath hemostatic valve can keep good sealing effect on instruments with large size difference, namely the problem that the compatibility of the sheath hemostatic valve needs to be improved.

The technical problem to be solved by the invention is realized by adopting the following technical scheme:

a hemostatic valve comprises a first sealing valve plate, a second sealing valve plate, a pressure ring, a valve cover and a valve seat;

the first sealing valve plate is of an elastic I-shaped structure (the first sealing valve plate is made of flexible materials) and is formed by connecting an upper circular table at the top, a square sheet in the middle and a lower circular table at the bottom, the first sealing valve plate is provided with a first cutting seam penetrating through the upper circular table, the square sheet and the lower circular table, and the middle part of the first cutting seam is provided with a conical through hole with a large upper part and a small lower part;

the second sealing valve plate is of an elastic round table structure, and at least one penetrating second cutting seam is arranged on the second sealing valve plate;

the compression ring is of a hollow annular structure;

the valve cover is a hollow cover body;

the upper end of the valve seat is sequentially provided with a first sealing valve plate and a second sealing valve plate from top to bottom, the lower end of the compression ring is connected with the valve seat, the lower round platform and the second sealing valve plate are tightly pressed and sealed with the upper end face of the valve seat, the valve cover is connected with the upper portion of the compression ring, and the upper round platform and the upper end of the compression ring are tightly pressed and sealed.

As a preferable example, the inner wall of the lower portion of the pressing ring is provided with a plurality of vertical ribs, and the lower round platform of the first sealing valve plate, the second sealing valve plate and the upper end of the valve seat are pressed tightly through the vertical ribs.

As a preferable example, the inner wall of the upper portion of the pressing ring is provided with a circle of blocking rings, the upper surface of each blocking ring is provided with a circle of convex ribs, and the valve cover tightly presses the upper round table of the first sealing valve plate and the blocking rings.

As a preferable example, the first sealing valve plate and the second sealing valve plate are of an integrated structure which is connected up and down.

In a preferred embodiment, the section of the second slit is in a non-perpendicular relationship with the upper and lower end faces of the second seal valve plate.

The invention has the beneficial effects that: when a large-size instrument and a small-size instrument are respectively inserted, the sealing device has good sealing effect, and the risk of bleeding of a patient in an operation is reduced; the second cutting seam is obliquely arranged, and the sealing effect can be kept under the condition of internal positive pressure.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic perspective view of a first sealing valve plate;

FIG. 3 is a schematic cross-sectional view of the first sealing valve plate;

FIG. 4 is a schematic structural diagram of a second sealing valve plate;

FIG. 5 is a schematic cross-sectional view of the pressure ring;

FIG. 6 is a schematic perspective view of the pressure ring;

fig. 7 is a schematic structural diagram of a large-sized instrument insertion hemostasis valve.

In the figure: the sealing valve comprises a first sealing valve plate 1, an upper round table 101, a square plate 102, a lower round table 103, a first slit 104, a conical through hole 105, a second sealing valve plate 2, a second slit 201, a pressing ring 3, a vertical rib 301, a blocking ring 302, a convex rib 303, a valve cover 4, a valve seat 5, a small-size instrument 6 and a large-size instrument 7.

Detailed Description

In order to make the technical means, the original characteristics, the achieved purpose and the efficacy of the invention easy to understand, the invention is further described with reference to the specific drawings.

As shown in fig. 1-7, a hemostatic valve comprises a first sealing valve plate 1, a second sealing valve plate 2, a press ring 3, a valve cover 4 and a valve seat 5; the valve seat 5 is a three-way connecting pipe;

the first sealing valve plate 1 is of an elastic I-shaped structure (the first sealing valve plate 1 is made of flexible materials such as silica gel) and is formed by connecting an upper circular truncated cone 101 at the top, a square plate 102 at the middle part and a lower circular truncated cone 103 at the bottom, the first sealing valve plate 1 is provided with a first slit 104 penetrating through the upper circular truncated cone 101, the square plate 102 and the lower circular truncated cone 103, and the middle part of the first slit 104 is provided with a conical through hole 105 with a large upper part and a small lower part;

the second sealing valve plate 2 is of an elastic circular truncated cone structure, and the second sealing valve plate 2 is at least provided with a second cutting seam 201 penetrating through the second sealing valve plate;

the compression ring 3 is of a hollow annular structure;

the valve cover 4 is a hollow cover body;

the upper end of the valve seat 5 is sequentially provided with a first sealing valve plate 1 and a second sealing valve plate 2 from top to bottom, the lower end of the pressing ring 3 is connected with the valve seat 5, the lower round platform 103, the second sealing valve plate 2 and the upper end face of the valve seat 5 are tightly pressed and sealed, the valve cover 4 is connected with the upper portion of the pressing ring 3, and the upper round platform 101 and the upper end of the pressing ring 3 are tightly pressed and sealed.

Examples

The valve cover 4, the first sealing valve plate 1, the pressing ring 3, the second sealing valve plate 2 and the valve seat 5 are manufactured through processing methods such as injection molding, vulcanization and punching. The connection between the valve cover 4 and the pressing ring 3, and the connection between the pressing ring 3 and the valve seat 5 can be realized by ultrasonic welding, chemical bonding, threads, clamping grooves and other methods. Fig. 1 shows a card slot connection mode.

The inner wall of the lower part of the pressing ring 3 is provided with a plurality of vertical ribs 301, and the lower round platform 103 of the first sealing valve plate 1, the second sealing valve plate 2 and the upper end of the valve seat 5 are pressed tightly through the vertical ribs 301.

The inner wall of the upper part of the pressing ring 3 is provided with a circle of retaining rings 302, the upper surface of each retaining ring 302 is provided with a circle of convex ribs 303, and the valve cover 4 tightly presses the upper round platform 101 of the first sealing valve plate 1 and the retaining rings 302. The ribs 303 facilitate sealing and compression and are not prone to dropping when the instrument is inserted.

The first sealing valve plate 1 and the second sealing valve plate 2 can adopt an integrated structure which is connected up and down, and can also adopt a split structure.

The section of the second slit 201 is not perpendicular to the upper and lower end faces of the second sealing valve plate 2.

The working principle is as follows:

as shown in fig. 1, when the small-sized instrument 6 is inserted into the hemostatic valve, it passes through the tapered through hole 105 of the first sealing valve plate 1. The diameter of the small end of the conical through hole 105 is smaller than that of the small-sized instrument 6, the small end can extrude the small-sized instrument 6, and the lower round table 103 is extruded by the lower end (the vertical rib 301) of the pressing ring 3, so that a new gap is prevented from being generated at the intersection of the small end and the first slit 104. Thus, the small end of the tapered through-hole 105 achieves a sealing effect when the small-sized instrument 6 is inserted.

As shown in FIG. 7, when the large-sized instrument 7 is inserted into the hemostatic valve, it enters the large opening end of the tapered through hole 105. The diameter of the large opening end of the conical through hole 105 is smaller than that of the large-size apparatus 7, the length of the first cut seam 104 is smaller than half of the circumference of the large-size apparatus 7, and when the large-size apparatus 7 passes through the square plate 102, a large friction force is generated, so that the upper circular table 101 of the first sealing valve plate 1 can deform along with the stretching of the large-size apparatus 7, and the originally horizontal surface of the upper circular table 101 can incline to fit the large-size apparatus 7 to form sealing.

When no instrument is inserted into the hemostatic valve, the second slit 201 of the second sealing valve plate 2 is automatically in the fitting state and forms a seal. And second lance 201 and 2 terminal surfaces of second sealing valve block are the non-vertical relation, so when receiving the power of the 2 terminal surfaces of perpendicular to second sealing valve block that come from inside, second lance 201 can the laminating tighter, and is sealed also better, also can keep sealed effect under the inside malleation condition promptly. The plurality of second slits 201 also reduce the deflection of the instrument as it passes through.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.