Small blood oxygenator

Abstract

The utility model provides a small blood oxygenator which comprises a shell, an upper end cover and a lower end cover, the upper end cover and the lower end cover are arranged at the two ends of the shell, an oxygenator core is arranged in the shell, an air inlet is formed in the upper end cover, an air outlet is formed in the lower end cover, the air inlet and the air outlet are located on the two sides of the oxygenator core respectively, and a liquid outlet and a liquid inlet are formed in the shell respectively. The liquid outlet and the liquid inlet are located in the two sides of the oxygenator core respectively, a gap is formed between the periphery of the oxygenator core and the inner ring of the shell, a liquid medium can flow into the gap from the liquid outlet and flow out of the gap from the liquid inlet, and the liquid outlet is located above the liquid inlet. According to the small blood oxygenator, all functional components of the oxygenator are independent parts, shaping production is facilitated, an integrated mold does not need to be arranged, the development cost and the production cost are reduced, assembling is convenient, the production efficiency is not affected, the liquid outlet, the liquid inlet, the air inlet and the air outlet are formed in different parts, adjustment is convenient, and use is convenient. Therefore, different use conditions can be adapted.

Description

Technical Field

[0001] The utility model belongs to the field of oxygenators, in particular to a small blood oxygenator. Background Art

[0002] Currently, the blood oxygenator used in clinical practice is typically a hollow fiber membrane oxygenator, which is usually composed of hollow fiber filaments that are cross-overlapped to form a hollow fiber bundle. During operation, oxygen flows inside the fiber membrane, while blood flows outside the fiber membrane. Oxygen molecules diffuse from the fiber membrane into the blood for blood oxygenation, and carbon dioxide molecules in the blood diffuse through the fiber membrane into the fiber membrane and are carried away. Currently, commercial oxygenators are usually configured with uniform specifications, while experimental equipment requires different specifications to meet different practical working conditions. Different product specifications require different production molds, and cannot be shared with commercial products, resulting in high development costs. Utility Model Content

[0003] In view of this, the present invention aims to provide a small blood oxygenator to solve the problems of the prior art liquid oxygenator, which is an integrated shape, has high development costs, is difficult to change specifications, and cannot be adapted to different working conditions.

[0004] In order to achieve the above-mentioned purpose, the technical solution of the utility model is achieved as follows:

[0005] A small blood oxygenator comprises an outer shell and upper and lower end covers provided at both ends thereof, an oxygenator core being provided within the outer shell, an air inlet being provided on the upper end cover, and an air outlet being provided on the lower end cover, wherein the air inlet and the air outlet are respectively located on either side of the oxygenator core, a liquid outlet and a liquid inlet being respectively provided on the outer shell, wherein the liquid outlet and the liquid inlet are respectively located on either side of the oxygenator core, and a gap being provided between the outer periphery of the oxygenator core and the inner ring of the outer shell, wherein a liquid medium can flow into the gap through the liquid inlet and flow out of the gap through the liquid outlet, and wherein the liquid outlet is located above the liquid inlet.

[0006] Furthermore, the gaps between the outer peripheries of both ends of the oxygenator core and the inner ring of the shell are filled with epoxy resin.

[0007] Furthermore, the oxygenator core includes an upper support plate, a lower support plate and a plurality of hollow fiber membranes. The upper support plate and the lower support plate are respectively evenly distributed with multiple mounting holes. The outer peripheries of both ends of each hollow fiber membrane are respectively installed in a mounting hole of the upper support plate and a mounting hole of the lower support plate. The outer periphery of the upper support plate, the outer peripheries of both ends of the hollow fiber membrane and the outer periphery of the lower support plate are respectively filled with epoxy resin to fill the gaps between them and the inner ring of the outer shell.

[0008] Furthermore, the upper support plate and the lower support plate are connected by a support rod.

[0009] Furthermore, a first blind groove is provided at the lower end of the upper end cover, the upper outer edge of the shell is installed in the first blind groove, and a first flattening space is provided between the upper end of each hollow fiber membrane and the top of the first blind groove, and the air inlet is connected to the first flattening space.

[0010] Furthermore, a second blind groove is provided at the upper end of the lower end cover, the lower outer edge of the shell is installed in the second blind groove, and a second flat pressure space is provided between the lower end of each hollow fiber membrane and the bottom of the second blind groove, and the air outlet is connected to the second flat pressure space.

[0011] Furthermore, the pore distance between two adjacent hollow fiber membranes is 0.2-1.2 mm.

[0012] Compared with the prior art, the small blood oxygenator described in the present invention has the following beneficial effects:

[0013] (1) The utility model discloses a small-sized blood oxygenator, wherein each functional component of the oxygenator is a separate part, which is convenient for standardized production and does not require an integrated mold, thereby reducing development and production costs. The oxygenator is easy to assemble without affecting production efficiency. The liquid outlet, liquid inlet, air inlet, and air outlet are arranged on different parts, which is convenient for adjustment so as to adapt to different working conditions.

[0014] (2) The utility model discloses a small blood oxygenator. The gaps between the outer peripheries of both ends of the oxygenator core and the inner ring of the shell are filled with epoxy resin to ensure that these parts do not leak. In this embodiment, the test liquid medium is blood. The epoxy resin filling prevents the blood from leaking from these parts while not contaminating the blood. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings, which constitute part of the present invention, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0016] Figure 1 This is a schematic structural diagram of a small blood oxygenator according to an embodiment of the present utility model;

[0017] Figure 2 This is a cross-sectional schematic diagram of a small blood oxygenator according to an embodiment of the present utility model;

[0018] Figure 3 This is a schematic diagram of the explosion structure of a small blood oxygenator according to an embodiment of the present utility model;

[0019] Figure 4 This is a schematic structural diagram of the assembly of the upper support plate, lower support plate and support rod according to an embodiment of the present utility model.

[0020] Description of reference numerals:

[0021] 1-upper end cover; 11-air inlet; 12-first equalizing space; 2-lower end cover; 21-air outlet; 22-second equalizing space; 3-housing; 31-liquid outlet; 32-liquid inlet; 4-oxygenator core; 41-upper support plate; 42-lower support plate; 43-hollow fiber membrane; 44-support rod. DETAILED DESCRIPTION

[0022] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other.

[0023] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do 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 limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0024] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0025] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0026] like Figure 1-Figure 4As shown, a small blood oxygenator includes a shell 3 and an upper end cover 1 and a lower end cover 2 provided at both ends thereof, and an oxygenator core 4 is provided inside the shell 3, an air inlet 11 is provided on the upper end cover 1, and an air outlet 21 is provided on the lower end cover, and the air inlet 11 and the air outlet 21 are respectively located on both sides of the oxygenator core 4, and a liquid outlet 31 and a liquid inlet 32 ​​are respectively provided on the shell 3, and the liquid outlet 31 and the liquid inlet 32 ​​are respectively located on both sides of the oxygenator core 4, and the outer periphery of the oxygenator core 4 is adjacent to the shell 3. Gaps are provided between the inner rings, and liquid medium can flow into the gaps from the liquid inlet 32 ​​and out of the gaps from the liquid outlet 31. The liquid outlet 31 is located above the liquid inlet 32. The functional components of the oxygenator are all separate parts, which facilitates standardized production and eliminates the need for an integrated mold, reducing development and production costs. It is also easy to assemble without affecting production efficiency. The liquid outlet 31 and liquid inlet 32 ​​are located on different parts from the air inlet 11 and air outlet 21, making them easy to adjust to suit different operating conditions.

[0027] The cross section of the housing 3 is a rectangular structure.

[0028] The periphery of both ends of the oxygenator core 4 is filled with epoxy resin to ensure that this part does not leak. In this embodiment, the test liquid medium is blood, and the epoxy resin filling prevents the blood from leaking from this part while not contaminating the blood. The oxygenator core 4 includes an upper support plate 41, a lower support plate 42, and a plurality of hollow fiber membranes 43. A plurality of mounting holes are evenly distributed on the upper support plate 41 and the lower support plate 42. The periphery of both ends of each hollow fiber membrane 43 is respectively installed in a mounting hole of the upper support plate 41 and a mounting hole of the lower support plate 42. The periphery of the upper support plate 41, the periphery of both ends of the hollow fiber membrane 43, and the periphery of the lower support plate 42 are respectively filled with epoxy resin to ensure that this part does not leak. The material of the hollow fiber membrane 43 is any one of PP, PVDF, PAN, PS or PES. The material used in this embodiment is PP, and the hole spacing between two adjacent hollow fiber membranes 43 is 0.2-1.2mm. The hole spacing in this embodiment is 0.45. The three nearest holes can be an isosceles right triangle or an equilateral triangle. The staff can adjust it according to the working conditions. The distribution of the three nearest holes in an isosceles right triangle can enable the blood to obtain the maximum shear force when flowing, and the ability to disperse the blood is weak; while the distribution of the three nearest holes in an equilateral triangle can enable the blood to obtain the maximum shear force when flowing, and at the same time have good blood flow dispersion ability.

[0029] The presence of the upper support plate 41 and the lower support plate 42 enables the hollow fiber membrane filaments 43 to be evenly distributed inside the shell 3 according to the spacing rules, and in space, the hollow fiber membrane filaments 43 maintain a parallel relationship. When the blood flows outside the membrane wall of the hollow fiber membrane filaments 43, the resistance is reduced, and at the same time, the contact with the oxygen-containing membrane wall can be maximized.

[0030] The cross-sections of the upper support plate 41, the lower support plate 42 and the outer shell 3 are all rectangular structures. The purpose of designing the cross-section into a rectangle is to increase the number of hollow fiber membrane filaments 43 as much as possible. At the same time, through the spacing arrangement of the hollow fiber membrane filaments 43, it is ensured that the blood can fully contact each other when flowing on the outer wall of the hollow fiber membrane filaments 43.

[0031] The upper support plate 41 is connected to the lower support plate 42 by a support rod 44, and the support rod 44 connects the upper support plate 41 and the lower support plate 42, and improves the structural strength of the hollow fiber filaments. The lower end of the upper end cover 1 is provided with a first blind groove, and the upper end outer edge of the shell 3 is installed in the first blind groove, and a first flat pressure space 12 is provided between the upper end of each hollow fiber membrane filament 43 and the top of the first blind groove. The air inlet 11 is connected to the first flat pressure space 12, and oxygen enters the first flat pressure space 12 from the air inlet 11, and then is isobarically transported by the first flat pressure space 12. It is delivered to each hollow fiber membrane filament 43, a second blind groove is provided at the upper end of the lower end cover 2, the outer edge of the lower end of the outer shell 3 is installed in the second blind groove, and a second equalization space 22 is provided between the lower end and the bottom of the second blind groove of each hollow fiber membrane filament 43, and the air outlet 21 is connected to the second equalization space 22. The gas in the hollow fiber membrane filament 43 is discharged into the second equalization space 22, and then discharged from the air outlet 21 at equal pressure to prevent the deformation of the hollow fiber membrane filament 43 caused by excessive pressure difference between the inlet and outlet ends of the hollow fiber membrane filament 43.

[0032] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A small blood oxygenator, characterized in that: The invention comprises a shell (3) and an upper end cover (1) and a lower end cover (2) arranged at both ends thereof, and an oxygenator core (4) is arranged inside the shell (3), an air inlet (11) is arranged on the upper end cover (1), and an air outlet (21) is arranged on the lower end cover, and the air inlet (11) and the air outlet (21) are respectively located on both sides of the oxygenator core (4), and a liquid outlet (31) and a liquid inlet (32) are respectively provided on the shell (3), and the liquid outlet (31) and the liquid inlet (32) are respectively located on both sides of the oxygenator core (4), and a gap is provided between the outer periphery of the oxygenator core (4) and the inner circle of the shell (3), and a liquid medium can flow into the gap from the liquid inlet (32) and flow out of the gap from the liquid outlet (31), and the liquid outlet (31) is located above the liquid inlet (32).

2. The small blood oxygenator according to claim 1, characterized in that: The gaps between the outer peripheries of both ends of the oxygenator core (4) and the inner ring of the outer shell (3) are filled with epoxy resin.

3. The small blood oxygenator according to claim 2, characterized in that: The oxygenator core (4) includes an upper support plate (41), a lower support plate (42) and a plurality of hollow fiber membranes (43). A plurality of mounting holes are evenly distributed on the upper support plate (41) and the lower support plate (42). The outer periphery at both ends of each hollow fiber membrane (43) is respectively mounted in a mounting hole of the upper support plate (41) and a mounting hole of the lower support plate (42). The outer periphery of the upper support plate (41), the outer periphery at both ends of the hollow fiber membrane (43) and the outer periphery of the lower support plate (42) are respectively filled with epoxy resin to form a gap with the inner ring of the shell (3).

4. The small blood oxygenator according to claim 3, characterized in that: The upper support plate (41) and the lower support plate (42) are connected via a support rod (44).

5. The small blood oxygenator according to claim 3, characterized in that: A first blind groove is provided at the lower end of the upper end cover (1), the outer edge of the upper end of the shell (3) is installed in the first blind groove, and a first flattening space (12) is provided between the upper end of each hollow fiber membrane (43) and the top of the first blind groove, and the air inlet (11) is connected to the first flattening space (12).

6. The small blood oxygenator according to claim 3, characterized in that: A second blind groove is provided at the upper end of the lower end cover (2), the outer edge of the lower end of the shell (3) is installed in the second blind groove, and a second flattening space (22) is provided between the lower end of each hollow fiber membrane (43) and the bottom of the second blind groove, and the air outlet (21) is connected to the second flattening space (22).

7. The small blood oxygenator according to claim 3, characterized in that: The pore distance between two adjacent hollow fiber membranes (43) is 0.2-1.2 mm.

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