Blood perfusion device

Abstract

The invention discloses a hemoperfusion device which comprises a barrel, end covers in threaded connection with the two ends of the barrel, Luer tapers in the middles of the end covers and rotary covers in threaded connection with the Luer tapers, and is characterized in that a first circular groove is formed in the end face of the barrel, a filter structure is arranged in the first circular groove, and a filter screen is arranged in the middle of the filter structure; the filter screen is in butt joint with the inner port of the Luer taper, the area of the filter screen is the same as that of the inner port, the two ends in the barrel are conical, the conical port is in butt joint with the filter screen, and the area of the conical port is the same as that of the inner port. The device has the advantages that the two ends of the inner cavity of the barrel are conical, so that vortex is prevented from being formed after blood flows in, and a good shunting / converging guiding effect is achieved; and if a small amount of bubbles appear, the bubbles can directly float to the conical port, so that medical staff can discharge the bubbles very conveniently. The cylinder is provided with a wide end face, the filter screen and the blood are far away from the outer wall of the cylinder, and a plurality of sealing rings are arranged, so that the sealing effect is reliable and guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of blood perfusion devices, in particular to a blood perfusion device. Background Art

[0002] Hemoperfusion is a treatment method that uses an extracorporeal circulation device to introduce the patient's blood into a perfusion device containing solid adsorbents, remove endogenous or exogenous pathogenic substances in the blood, and then return the purified blood to the patient's body. The hemoperfusion device containing solid adsorbents is an important component of the blood purification treatment device, which is required to have good sealing and blood compatibility and be easy to industrialize and mass produce.

[0003] However, the common blood perfusion devices, such as the blood perfusion devices disclosed in schemes CN201211354Y and CN101843932B, have a straight inner cylinder and a sharp turn structure at a vertical dead angle / near vertical angle at the blood inlet and outlet. Such blood perfusion devices have the following defects during use: 1. It is very easy to cause eddy currents to form in the blood flow process, which affects the rheological properties of the blood and causes malignant conditions such as coagulation; 2. It is not conducive to the discharge of bubbles generated in the perfusion device, and the presence of bubbles in the blood will directly threaten the patient's life safety, so that medical staff need to spend more time and energy to remove bubbles when using such perfusion devices; 3. The sealing design is concentrated near the inner and outer walls of the barrel port, and this range is very small. The distance between the filtering structure and the blood and the outer wall of the barrel is also very close, which makes the sealing effect have great uncertainty. Therefore, it is very necessary to make major structural improvements to the existing blood perfusion devices. Summary of the invention

[0004] The object of the present invention is to provide a blood perfusion device to solve the problems raised in the above background technology.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] The present invention provides a blood perfusion device, comprising a barrel, wherein both ends of the barrel are provided with end caps connected by threads, the middle of the end cap is provided with a Luer connector, and the Luer connector is provided with a screw cap connected by threads. The invention is characterized in that a circular groove one is provided on the end face of the barrel, the end cap covers the circular groove one, a filter structure is provided in the circular groove one, a filter screen is provided in the middle of the filter structure, the filter screen is connected to the inner port of the Luer connector and the filter screen has the same area as the inner port, the inner ends of the barrel are tapered and form tapered ports, the tapered port is connected to the filter screen, and the tapered port has the same area as the inner port.

[0007] As an improvement, a sinking ring groove is provided at the edge of the circular groove, the filtering structure is in the shape of a disc, and a sealing ring is provided at the bottom of the edge, and the sealing ring is nested with the sinking ring groove.

[0008] As an improvement, a sealing ring 2 is provided near the conical port of the circular groove 1, and the sealing ring 2 is nested with the filtering structure.

[0009] As an improvement, a sealing ring three is provided around the filter screen of the filtering structure, a groove is provided at the bottom of the sealing ring three, and the groove is nested with the sealing ring two.

[0010] As an improvement, a second circular groove is provided at the inner end of the Luer connector, and the second circular groove is nested with the third sealing ring.

[0011] As an improvement, the pore size of the filter is 20-100 μm or 100-300 μm.

[0012] As an improvement, the conical connection in the cylinder is an arc-shaped bend.

[0013] As an improvement, the conical top angle in the cylinder is 130-150°.

[0014] The advantages of the present invention compared with the prior art are:

[0015] 1. Both ends of the inner cavity of the cylinder are tapered to prevent the formation of vortex after blood flows in, and also have a good diversion / convergence guiding effect;

[0016] Second, if a small amount of bubbles appear, they will float directly to the conical port, making it very convenient for medical staff to expel the bubbles.

[0017] 3. The cylinder has a wide end surface, which allows for flexible and sufficient sealing design. Most of the filtration structure is sandwiched between the cylinder and the end cover. The filter screen and blood are far away from the outer wall of the cylinder. The filtration structure is also equipped with multiple sealing rings, and the sealing effect is very reliable and guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings listed below are only some structural schematic diagrams of the present invention, not all of them.

[0019] Figure 1 It is a cross-sectional view of a blood perfusion device of the present invention.

[0020] Figure 2 It is a structural schematic diagram of a barrel of a blood perfusion device of the present invention.

[0021] Figure 3 The structure diagram of the filtering structure of a blood perfusion device of the present invention is shown in FIG. Figure 1 .

[0022] Figure 4The structure diagram of the filtering structure of a blood perfusion device of the present invention is shown in FIG. Figure 2 .

[0023] Figure 5 It is a structural schematic diagram of an end cover of a hemoperfusion device of the present invention.

[0024] Reference numerals:

[0025] Cylinder body 1; end cover 2; Luer connector 3; screw cap 4; circular groove 1 5; filter structure 6; filter screen 7; conical port 8; sink ring groove 9; sealing ring 1 10; sealing ring 2 11; sealing ring 3 12; groove 13; circular groove 2 14; arc bend 15. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] In the description of the embodiments of the present invention, it should be noted that if the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. appear, the indicated orientation or position relationship is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the product of the invention is usually placed when used. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0028] In addition, if the terms "first", "second", "third", etc. appear, they are only used to distinguish the description and cannot be understood as indicating or implying relative importance. If the terms "horizontal", "vertical", "overhanging", etc. appear, it does not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and it does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0029] In the description of the embodiments of the present invention, if the terms "multiple" or "several" appear, they represent at least two.

[0030] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] This embodiment combines the attached Figures 1 to 5 , a blood perfusion device is described in detail.

[0032] The present embodiment is a blood perfusion device, including a barrel 1, end caps 2 with threaded connection are provided at both ends of the barrel 1, a Luer connector 3 is provided in the middle of the end cap 2, the barrel 1 and the end caps 2 and the Luer connector 3 are symmetrically designed, the Luer connector 3 is provided with a screw cap 4 with threaded connection, the connection between the barrel 1, the end cap 2 and the Luer connector 3 is designed by the existing technology, and it is not repeated, the end face of the barrel 1 is provided with a circular groove 5, the end cap 2 covers the circular groove 5, the circular groove 5 is used to place a filter structure 6, and the filter structure is provided in the circular groove 5 6. The filter structure 6 is used to filter blood while preventing the adsorbent from overflowing. A filter screen 7 is provided in the middle of the filter structure 6, which is fixedly connected as a whole. The filter screen 7 is suitable for whole blood perfusion, which can ensure the smooth passage of formed elements such as blood cells and prevent solid adsorbent particles from flowing out of the perfusion device. The filter screen 7 is docked with the inner port of the Luer connector 3 and the area of ​​the filter screen 7 is the same as that of the inner port. The two ends of the cylinder 1 are conical and form a conical port 8. The conical port 8 is docked with the filter screen 7, and the area of ​​the conical port 8 is the same as that of the inner port. The conical design of the inner cavity end of the cylinder 1 leaves a very wide end face at the outer end of the cylinder 1. The diameter of the circular groove 15 is set to be at least four times the diameter of the conical port 8, so that at least three quarters of the filter structure 6 is sandwiched between the cylinder 1 and the end cover 2. The filter screen 7 is far away from the outer wall of the cylinder 1, and the sealing effect is very reliable. The conical design of the inner cavity end of the cylinder 1 conforms to the characteristics of fluid dynamics, which is conducive to the discharge of a small amount of bubbles generated by medical staff, ensuring a uniform blood flow rate, avoiding eddies caused by excessive local blood flow, and effectively reducing bubbles. At the input end, it is conducive to the gradual and uniform diversion and guidance of blood, and at the output end, it is conducive to the gradual and uniform convergence of blood, and the blood in the cavity of the cylinder 1 is not easy to form eddies.

[0033] The edge of the circular groove 5 is provided with a sinking ring groove 9, the filtering structure 6 is in the shape of a disc, and a sealing ring 10 is provided at the bottom of the edge, and the sealing ring 10 is nested with the sinking ring groove 9. The sealing ring 10 increases the sealing effect.

[0034] The circular groove 1 5 is provided with a sealing ring 2 11 near the conical port 8 , and the sealing ring 2 11 is nested with the filtering structure 6 .

[0035] A sealing ring 3 12 is arranged around the filter screen 7 of the filter structure 6, and a groove 13 is arranged at the bottom of the sealing ring 3 12, and the groove 13 is nested with the sealing ring 2 11. The sealing ring 2 11 increases the sealing effect.

[0036] The inner end of the Luer connector 3 is provided with a second circular groove 14, and the second circular groove 14 is nested with a sealing ring 3 12. The sealing ring 3 12 increases the sealing effect.

[0037] The pore size of the filter screen 7 is 20-100 μm or 100-300 μm.

[0038] The conical connection in the barrel 1 is an arc bend 15, which can slowly change the blood flow direction and avoid eddy currents.

[0039] The conical top included angle in the cylinder 1 is 130-150°.

[0040] In specific implementation, the Luer connectors 3 at both ends of the perfusion device are connected to the standard blood purification pipeline connectors respectively, and the blood enters the barrel 1 through the Luer connector 3 at one end, and the solid adsorbent in the barrel 1 purifies the blood, and the purified blood is output from the Luer connector 3 at the other end. The purpose of adsorbing pathogenic substances and purifying blood can be achieved by perfusing according to the conventional blood perfusion speed and treatment time in clinical practice.

[0041] The present invention and its embodiments are described above, and such description is not restrictive, and the actual protection scope is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A blood perfusion device, comprising a barrel (1), wherein both ends of the barrel (1) are provided with end caps (2) connected by threads, a Luer connector (3) is provided in the middle of the end cap (2), and the Luer connector (3) is provided with a screw cap (4) connected by threads, characterized in that: The end surface of the cylinder (1) is provided with a circular groove (5), the end cover (2) covers the circular groove (5), a filter structure (6) is provided in the circular groove (5), a filter screen (7) is provided in the middle of the filter structure (6), the filter screen (7) is connected to the inner port of the Luer connector (3), and the area of ​​the filter screen (7) is the same as that of the inner port, the two ends of the cylinder (1) are conical and form a conical port (8), the conical port (8) is connected to the filter screen (7), and the area of ​​the conical port (8) is the same as that of the inner port.

2. A blood perfusion device according to claim 1, characterized in that: A sinking ring groove (9) is provided at the edge of the circular groove (5); the filtering structure (6) is in the shape of a disc; a sealing ring (10) is provided at the bottom of the edge; the sealing ring (10) is nested and matched with the sinking ring groove (9).

3. A blood perfusion device according to claim 1, characterized in that: The circular groove one (5) is provided with a sealing ring two (11) near the conical port (8), and the sealing ring two (11) is nested with the filtering structure (6).

4. A blood perfusion device according to claim 3, characterized in that: A sealing ring three (12) is arranged around the filter screen (7) of the filtering structure (6), a groove (13) is arranged at the bottom of the sealing ring three (12), and the groove (13) is nested with the sealing ring two (11).

5. A blood perfusion device according to claim 4, characterized in that: The inner end of the Luer connector (3) is provided with a second circular groove (14), and the second circular groove (14) is nested with the third sealing ring (12).

6. A blood perfusion device according to claim 1, characterized in that: The pore size of the filter screen (7) is 20 to 100 μm or 100 to 300 μm.

7. A blood perfusion device according to claim 1, characterized in that: The tapered connection in the cylinder (1) is an arc-shaped bend (15).

8. The blood perfusion device according to claim 1, characterized in that: The conical top included angle in the cylinder (1) is 130-150°.

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