CN215690385U

CN215690385U - End cover for blood purification device, blood purification device and blood purification equipment

Info

Publication number: CN215690385U
Application number: CN202121029764.5U
Authority: CN
Inventors: 王玉凤
Original assignee: Crown Medical Tech Dalian Co ltd
Current assignee: Crown Medical Tech Dalian Co ltd
Priority date: 2021-02-03
Filing date: 2021-05-14
Publication date: 2022-02-01
Anticipated expiration: 2031-05-14

Abstract

The present invention relates to an end cap for a blood purification device, and a blood purification device and a blood purification apparatus having the same, the end cap for a blood purification device including: upper segment, middle section and hypomere, wherein, the upper segment has the block and holds chamber and blood mouth, and the blood mouth is for being approximate cylindricly, and the middle section includes that blood holds the chamber, and the radius that the inner wall in blood held the chamber enlarges gradually for the radius top-down of blood mouth, and the hypomere is including being used for the lid of being connected with the barrel. The end cover for the blood purification device is used in the blood purification device, and the end cover is screwed on the cylinder body and is matched with the cap of the blood purification device, so that the blood flowing into the blood purification device is more consistent with the dynamic characteristics, the fluidity of the blood in the blood purification device such as a blood perfusion device is enhanced, the blood can pass through the blood perfusion device in a shorter time, a dead circulation area is not generated, and the risk of coagulation of a patient during blood perfusion is reduced.

Description

End cover for blood purification device, blood purification device and blood purification equipment

Technical Field

The utility model relates to the field of medical instruments, in particular to an end cover for a blood purification device, the blood purification device with the end cover and blood purification equipment with the device.

Background

The blood perfusion technology has been used more and more widely, and the technology has been successfully applied to the fields of treating drug poisoning, kidney diseases, immune system diseases and the like. In addition, blood perfusion has been widely accepted as a treatment for diseases, and the amount of use of such treatment is increasing year by year.

As a medical instrument dedicated to blood purification, a blood perfusion apparatus incorporates an adsorbent for purifying blood. In clinical use, the blood perfusion device is connected in series with the extracorporeal blood circulation pipeline, and when blood flows through the blood perfusion device, the adsorbent inside the blood adsorbs pathogenic substances in the blood, so that the aim of treating diseases is fulfilled.

Because blood flows through the hemoperfusion ware, so possess the hydrodynamics characteristic, and the inside inlet section of prior art hemoperfusion ware has perpendicular dead angle, leads to blood to produce the vortex easily, reduces blood flow velocity, leads to the blood coagulation to produce, has increased patient's use risk, and simultaneously, the result of use of adsorbent has also been reduced in the dead cycle district. Therefore, the hemoperfusion apparatus not only can be used as a container for adsorbing agent and blood, but also has an important influence on the blood purification effect due to the internal structure of the hemoperfusion apparatus.

Disclosure of Invention

The present invention has been made in view of solving the conventional problems, and an object of the present invention is to provide a portable electronic device,

providing:

[1] an end cap for a blood purification device, the end cap comprising: an upper section, a middle section and a lower section, wherein,

the upper section has a cap receiving cavity and a blood nozzle, the blood nozzle is approximately cylindrical,

the middle section comprises a blood accommodating cavity, the radius of the inner wall of the blood accommodating cavity is gradually enlarged relative to the radius of the blood nozzle from top to bottom,

the lower section comprises a cover body connected with the cylinder body.

[2] The end cap for a blood purification device according to the above [1], wherein the radius of the inner wall of the blood accommodating chamber is enlarged continuously or stepwise from the top to the bottom with respect to the radius of the blood nozzle.

[3] The end cap for a blood purification device of the above [2], wherein the blood accommodating chamber is horn-shaped.

[4] The end cap for a blood purification device according to any one of the above [1] to [3], wherein the inner wall of the blood accommodating chamber includes three arc-shaped inner walls, which are respectively the 1 st stage, the 2 nd stage and the 3 rd stage, and the radii of the arc-shaped inner walls are different.

[5] The end cap for a blood purification device according to the above [4], wherein the arc radius of the 1 st stage is in a range of 5cm to 15cm, the arc radius of the 2 nd stage is in a range of 20cm to 25cm, and the arc radius of the 3 rd stage is in a range of 4cm to 10 cm.

[6] The blood purification apparatus end cap according to any one of [1] to [3], wherein a female screw is formed on an inner surface of the cap housing chamber.

[7] The end cap for a blood purification device according to any one of the above [1] to [3], wherein the middle section further comprises a stopper groove.

[8] The blood purification apparatus end cap according to any one of the above [1] to [3], wherein an internal thread is formed on an inner surface of the cap body to be screwed to the cylinder.

[9] A blood purification device comprising the blood purification device end cap, and cylinder of [1] to [3].

[10] A blood purification apparatus comprising the blood purification device of the above [9].

Effects of the utility model

The end cap for the blood purification device is used in the blood purification device, the end cap is screwed on the cylinder body and is matched with the cap of the blood purification device, so that the blood flowing into the blood purification device is enabled to be more consistent with the dynamic characteristics, the fluidity of the blood in the blood purification device such as a blood perfusion device is enhanced, the blood can pass through the blood purification device in a shorter time, a dead circulation area is not generated, and the risk of coagulation of a patient during blood perfusion is reduced.

Drawings

Fig. 1 is a sectional front view showing an end cap of embodiment 1 of the utility model;

FIG. 2 is a front view showing an end cap of embodiment 1 of the utility model;

FIG. 3 is a sectional front view showing the connection relationship of the cap, the cap and the cylinder of the hemoperfusion cartridge in accordance with embodiment 3 of the present invention;

fig. 4 is an exploded perspective view showing the end cap of the hemoperfusion cartridge of embodiment 3 of the present invention.

Description of reference numerals:

1. capping; 2. a waterproof ring; 3. an end cap; 4. a seal ring; 5. filtering with a screen; 6. a barrel; 31. an upper section; 32. a lower section; 33. a middle section; 34. a blood nozzle; 35. a cap receiving cavity; 36. a blood receiving chamber; 37. a cover body; 321. a limiting groove; 331. stage 1; 332: stage 2; 333: stage 3

Detailed Description

The utility model provides an end cover for a blood purification device, which is divided into an upper section, a middle section and a lower section.

The upper section has a cap receiving cavity for receiving a portion of a cap for securing the cap to the end cap and a blood spout.

The fixing method of the cap and the end cap is not particularly limited, and may be any connecting method such as a screw connection, a clip connection, and the like, and preferably, a screw connection, and when the connecting method is a screw connection, a female screw is formed on an inner surface of the cap receiving chamber.

The blood spout is an inlet channel for blood, is substantially cylindrical, and is located in the central axis portion of the entire end cap, and the length of the blood spout is not particularly limited, and may be the same as or different from the height of the cap. The inner diameter of the blood spout is not particularly limited, and may be a generally limited size as long as blood can easily flow in and out, and it is preferable to maintain the same inner diameter throughout the entire blood spout.

The aforementioned middle section is next to the aforementioned upper section, the diameter of the inlet of this middle section is the same with the internal diameter of blood mouth lower extreme, this middle section includes the blood and holds the chamber, this blood holds the chamber and can hold more blood for the blood mouth.

The radius of the inner wall of the blood accommodating chamber gradually increases from the top to the bottom with respect to the radius of the blood spout, and the term "gradually increases" means that the radius of the inner wall of the blood accommodating chamber gradually increases with respect to the radius of the blood spout, rather than suddenly increasing.

The specific "gradual expansion" method may be, for example, a continuous expansion method or a stepwise expansion method.

By "continuously expanding" is meant that the inner wall of the entire blood containment chamber is smooth and without transitional connections. As a continuous expansion method, the entire blood accommodating chamber may be a truncated cone shape or a trumpet shape. The truncated cone shape is, for example, such that the included angle θ (hereinafter referred to as "inclination angle") between the generatrix of the truncated cone and the axis is in the range of 0 ° < θ ≦ 45 °, more preferably 5 ° < θ ≦ 25 °, and still more preferably 10 ° < θ ≦ 15 °.

As a way of expanding in stages, the inner wall of the entire blood-receiving chamber may be divided into several stages, centered on the axis, each of which is inclined at a different angle with respect to the axis but is larger and larger as a whole. The number of stages into which the entire inner wall is divided is not particularly limited, and may be 2 stages, 3 stages, or 3 or more stages. The stages can be the combination of circular truncated cones, the combination of circular arc inner wall surfaces and the combination of the circular truncated cones and the circular arc surfaces. As a specific example of the combination between the circular truncated cones, for example, as an example of the 3 stages, the inclination angle of the 1 st stage is 2 ° to 10 °, the inclination angle of the 2 nd stage is 15 ° to 25 °, and the inclination angle of the 3 rd stage is 30 ° to 45 °; as a specific example of the combination between the arc-shaped inner wall surfaces, for example, as an example of the 3 stages, the arc radius of the 1 st stage is in the range of 5cm to 15cm, the arc radius of the 2 nd stage is in the range of 20cm to 25cm, and the arc radius of the 3 rd stage is in the range of 4c to 10cm from the top.

Preferably, the radius of the inner wall of the blood accommodating chamber is continuously enlarged from the top to the bottom along the inner surface of the blood nozzle. For example, when the inner wall of the entire blood holding chamber has circular arcs in several stages, the circular arcs are preferably smooth and continuous, and the blood holding chamber is preferably flared in terms of matching the fluid flow rate.

The middle section may further be provided with a limiting groove for fixing a filter screen for filtering liquid, but not limited thereto.

The end cap of the utility model is screwed on the cylinder body and is matched with the cap of the blood purification device for use.

In a further embodiment, the blood purification apparatus of the present invention includes the above-described cap, and cylinder for a blood purification apparatus, and the cap, and cylinder are used in combination to obtain the blood purification apparatus. As a specific example of the blood purification apparatus, for example, a blood perfusion apparatus may further include a cap that is engaged with the end cap, and the cap may further include a cap body that includes a peripheral wall, an end wall, and a hollow connection column, and a sealing cushion, wherein one axial end of the peripheral wall is formed as a cap opening, and the other axial end is closed by the end wall.

In a further embodiment, the blood purification apparatus of the present invention is provided with the above blood purification device.

The following detailed description of the utility model refers to the accompanying drawings, which illustrate specific embodiments in which the utility model can be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the utility model. It is to be understood that the various embodiments of the utility model are different, but not necessarily mutually exclusive. For example, the particular shapes, structures and characteristics described herein may be achieved in one embodiment and in other embodiments without departing from the spirit and scope of the present invention. In addition, it is to be understood that the location or arrangement of individual elements within each disclosed embodiment may be modified without departing from the spirit and scope of the utility model. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the present invention is defined only by the appended claims, along with the full scope of equivalents to which such claims are entitled. In the drawings, like reference numerals denote the same or similar functions in various embodiments, and the length, area, thickness, and the like, and the shape thereof may be enlarged for convenience.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like, indicate orientations and positional relationships based on the orientations and positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be considered as limiting the present invention.

Furthermore, the terms "1 st," "2 nd," "3 rd," etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

Example 1

Fig. 1 shows a cross-sectional front view of the end cap of the present invention, the end cap (3) in this embodiment is an integrated end cap, which is divided into 3 sections, namely an upper section (31), a middle section (33) and a lower section (32), wherein the upper section (31) of the end cap is in threaded connection with the end cap (1), the end cap (3) of the lower section (32) of the end cap is in threaded connection with the cylinder, and the middle section (33) of the end cap is located between the upper section (31) and the lower section (32). A blood nozzle (34) and a cap accommodating cavity (35) are arranged in the upper section (31) of the end cap, the cap accommodating cavity (35) surrounds the blood nozzle (34), and internal threads are formed on the inner surface of the cap accommodating cavity (35). The middle section (33) of the end cover comprises a blood containing cavity (36), the blood containing cavity (36) is formed by three sections of arc-shaped inner walls which are respectively a 1 st stage (331), a 2 nd stage (332) and a 3 rd stage (333), the arc radius of the 1 st stage (331) is 10.0cm, the arc radius of the 2 nd stage (332) is 23.8cm, the arc radius of the 3 rd stage (333) is 5.0cm, the arcs of the 1 st stage (331), the 2 nd stage (332) and the 3 rd stage (333) are connected smoothly, so that the inner part of the end cover is provided with a smooth transition structure, and the whole blood containing cavity (36) is horn-shaped. A limiting groove (321) is arranged in the lower section (32) of the end cover, a sealing ring (4) is contained in the limiting groove (321), and the limiting groove is matched with the cylinder body (6) to form a filter screen containing cavity which can contain the sealing ring (4) and the filter screen (5).

Fig. 2 is a front view showing the end cap of embodiment 1 of the present invention, there are several protrusions outside the lower section (32) of the end cap, and the cross-sectional area of the upper section (31) of the end cap is smaller than that of the lower section (32) of the end cap.

Example 2

The end cap of example 2 has the same basic structure as example 1 except that the interior of the middle section (33) of the end cap is formed by three arcs, the arc radius of the 1 st stage is 11.5cm, the arc radius of the 2 nd stage is 22.0cm, and the arc radius of the 3 rd stage is 5.0cm, and the arcs of the 1 st stage, the 2 nd stage and the 3 rd stage are smoothly connected to form a smooth transition structure in the end cap.

Example 3

Example 3 is a hemoperfusion cartridge of the present invention. FIG. 3 is a front sectional view showing the connection relationship between the cap (3) and the cap (1) and the cylinder (6) of the hemoperfusion apparatus according to embodiment 3 of the present invention; fig. 4 is an exploded perspective view showing the end cap (3) of the hemoperfusion cartridge of embodiment 3 of the present invention. The hemoperfusion device comprises the end cover of embodiment 1 or embodiment 2, and the hemoperfusion device of the embodiment comprises a cylinder body (6), wherein different types of adsorbents such as activated carbon adsorbent, resin adsorbent, affinity immunoadsorbent and the like can be accommodated in the cylinder body (6) according to different treatment purposes. The two end sides of the cylinder body (6) are of symmetrical structures and are used for accommodating the filter screen (5) and the sealing ring (4), the cylinder body (6) is sealed by the end cover (3), and the cylinder body (6) and the lower section (32) of the end cover are provided with matched thread devices for locking. The upper end (31) of the end cover is connected with the end cap (1), and a waterproof ring (2) is arranged between the end cover (3) and the end cap (1).

When in use, the cap (1) is unscrewed, blood enters from the blood nozzle (34) of the upper section (31) and smoothly flows to the cylinder body (6) through the middle section (33) and the lower section (32) which have smooth inner parts.

The end cover structure of the blood perfusion device disclosed by the embodiment of the utility model better accords with the characteristic of blood flow, blood can pass through the blood perfusion device in a short time, a dead circulation area is prevented from being formed, and the risk of coagulation of a patient during blood perfusion is reduced.

Industrial applicability

The end cover for the blood purification device can be widely used in the blood purification device, the end cover is screwed on the cylinder body and is matched with the cap of the blood purification device, so that the blood flowing into the blood purification device is more consistent with the dynamic characteristics, the liquidity of the blood in the blood purification device such as a blood perfusion device is enhanced, the blood can pass through the blood perfusion device in a short time, a dead circulation area is not generated, and the risk of coagulation of a patient during blood perfusion is reduced.

Claims

1. An end cap for a blood purification device, characterized in that the end cap comprises: an upper section, a middle section and a lower section, wherein,

the upper section is provided with a cap containing cavity and a blood nozzle which is approximately cylindrical,

the lower section comprises a cover body used for being connected with the cylinder body.

2. The end cap for a blood purification apparatus according to claim 1, wherein the radius of the inner wall of the blood-receiving chamber is enlarged continuously or stepwise from the top to the bottom with respect to the radius of the blood nozzle.

3. The end cap for a blood purification apparatus according to claim 2, wherein the blood accommodating chamber is formed in a trumpet shape.

4. The end cap for the blood purification device according to any one of claims 1 to 3, wherein the inner wall of the blood accommodating chamber comprises three sections of arc-shaped inner walls, which are respectively the 1 st section, the 2 nd section and the 3 rd section from top to bottom, and the radius of each section of arc-shaped inner wall is different.

5. The blood purification apparatus end cap according to claim 4, wherein the arc radius of the 1 st stage is in a range of 5cm to 15cm, the arc radius of the 2 nd stage is in a range of 20cm to 25cm, and the arc radius of the 3 rd stage is in a range of 4cm to 10 cm.

6. The end cap for a blood purification apparatus according to any one of claims 1 to 3, wherein an internal thread is formed on an inner surface of the cap housing chamber.

7. The end cap for a blood purification device according to any one of claims 1 to 3, wherein the middle section further comprises a limiting groove.

8. The end cap for a blood purification apparatus according to any one of claims 1 to 3, wherein an internal thread is formed on an inner surface of the cap body for screwing with the cylinder body.

9. A blood purification device comprising the end cap, and cylinder for blood purification device according to claims 1 to 8.

10. A blood purification apparatus characterized by comprising the blood purification device of claim 9.