Blood perfusion device

Abstract

The hemoperfusion device comprises a cylinder body, end covers arranged at the two ends of the cylinder body, and filter screens arranged between the end covers and the cylinder body, and the inner side surface of the end cover is provided with a filter screen supporting convex part which protrudes towards the interior of the cylinder body. According to the utility model, the convex part is arranged on the inner side surface of the end cover and extends towards the inner direction of the cylinder body, and the convex part can prop against the filter screen and prevent the filter screen from being attached to the inner side surface of the end cover, so that a certain interval space can be kept between the filter screen and the inner side surface of the end cover, the smoothness of the filter screen is ensured, the flatness of the filter screen can be kept, and the exhaust efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of medical apparatus and instruments, and particularly relates to a blood perfusion device. BACKGROUND

[0002] Blood perfusion (HP) is to lead the blood of a patient out of the body, contact the blood with an adsorbent in a blood purification device (blood perfusion device), remove exogenous or endogenous toxins in the blood through the adsorption of the adsorbent, and then return the purified blood to the patient, so as to achieve the treatment purpose of purifying blood. The blood perfusion device generally comprises a cylinder, the cylinder is filled with an adsorbent, an end cover is arranged at the end of the cylinder, and a blood nozzle connected with an external blood pipeline is arranged on the end cover. In order to avoid that the granular adsorbent filled in the blood perfusion device enters the blood return circuit during treatment and causes a safety risk, a filter screen for blocking the adsorbent is arranged at the two ends of the cylinder. The blood perfusion device needs to be pre-flushed before perfusion treatment, and the internal air needs to be exhausted after pre-flushing, so as to prevent air from entering the patient's body during treatment and endanger the safety of life. Since the filter screen is generally thin, the filter screen is prone to being attached to the end cover when the blood perfusion device is exhausted, or the filter screen fluctuates with the bubbles, which is not conducive to the smooth exhaust of gas through the filter screen and the end cover. SUMMARY

[0003] The utility model aims at providing a blood perfusion device which can improve exhaust efficiency and solve the problem of difficult exhaust of the existing structure.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0005] The blood perfusion device comprises a cylinder, end covers arranged at the two ends of the cylinder, and a filter screen arranged between the end covers and the cylinder; the inner side surface of the end cover is provided with a filter screen support protruding part protruding into the cylinder.

[0006] In some embodiments, the extension direction of the filter screen support protruding part is parallel to the axis of the end cover.

[0007] In some embodiments, at least two filter screen support protruding parts are circumferentially arranged at the periphery of the center of the end cover.

[0008] In some embodiments, at least two circles of filter screen support protruding parts are arranged on the end cover, and the filter screen support protruding parts of adjacent circles are arranged in a staggered manner or in an aligned manner.

[0009] In some embodiments, the end parts of the filter screen support protruding parts are flush with each other.

[0010] In some embodiments, the end parts of the filter screen support protruding parts have rounded parts.

[0011] In some embodiments, the outer diameter of the filter screen support protrusion is 1mm-5mm.

[0012] In some embodiments, the filter screen support protrusion is a circular cylinder or an elliptical cylinder.

[0013] In some embodiments, the filter screen support protrusion is an arc-shaped sheet.

[0014] In some embodiments, the inner concave surface of the sheet faces the center of the end cover.

[0015] From the above technical solutions, the utility model discloses the protrusion that protrudes and extends to the direction of the cylinder in the end cover inner side surface, and the protrusion can resist the filter screen, prevents the filter screen from sticking on the end cover inner side surface when exhausting and keeps the flatness of filter screen, so that the interval space between filter screen and the end cover inner side surface can be kept, keeps the unobstructed of filter screen and improves the exhaust efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model, the following will be to the drawings needed to be used in the embodiment or prior art description do a simple introduction, obviously, the following description in the drawings only some embodiments of the utility model, for those skilled in the art, under the premise of not paying creative labor, still can obtain other drawings according to these drawings.

[0017] Figure 1 It is the sectional view of blood perfusion device embodiment 1 of the utility model;

[0018] Figure 2 It is the structural schematic diagram of end cover of the utility model embodiment 1;

[0019] Figure 3 It is the bottom view of end cover of the utility model embodiment 1;

[0020] Figure 4 It is the structural schematic diagram of end cover of the utility model embodiment 2;

[0021] Figure 5 It is the structural schematic diagram of end cover of the utility model embodiment 3;

[0022] Figure 6 It is the structural schematic diagram of end cover of the utility model embodiment 4;

[0023] Figure 7 It is the structural schematic diagram of end cover of the utility model embodiment 5.

[0024] The specific implementation of the utility model will be further described in detail in the following in combination with the drawings. SPECIFIC EMBODIMENTS

[0025] The utility model is described in detail below with reference to the drawings. In the detailed description of the utility model embodiments, for the convenience of description, the drawings showing the device structure will be partially enlarged without the general proportion, and the schematic diagram is only an example, which should not limit the scope of the utility model protection herein. It should be noted that all the drawings are drawn in a simplified form and non-precise proportion, only for the purpose of convenient and clear auxiliary description of the utility model embodiments. Meanwhile, in the description of the present application, the terms "first", "second" and the like are only used for distinguishing description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features; the directions or position relations indicated by the terms "positive", "negative", "bottom", "upper", "lower" and the like are based on the directions or position relations shown in the drawings, only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular direction, be constructed and operated in a particular direction, so it cannot be understood as a limitation on the utility model.

[0026] Embodiment 1

[0027] As shown in Figure 1 , Figure 2 and Figure 3 , the blood perfusion device of the embodiment comprises a barrel 1, an end cover 2, a locking nut 3 and a filter screen 4. The barrel 1 is a hollow barrel, both ends of which are open, and the end cover 2 is arranged at both ends of the barrel 1 through the locking nut 3 to seal the barrel 1. The end cover 2 is provided with a blood nozzle 2a. The locking nut 3 of the embodiment is connected with the barrel 1 through threads, and external threads are machined on the outer walls of both ends of the barrel 1, and the external threads on the locking nut 3 and the outer walls of the barrel 1 are matched, so that the end cover 2 and the barrel 1 are assembled together.

[0028] The barrel 1 is filled with adsorbent, and the filter screen 4 is arranged at both ends in the barrel 1 and located inside the end cover 2. The filter screen 4 is assembled between the end cover 2 and the end of the barrel 1 through a screen frame 4a. A sealing ring 6 is arranged between the screen frame 4a and the end cover 2, and after the end cover 2 is assembled on the barrel 1 through the locking nut 3, the sealing ring 6 is compressed, so that the end cover 2 and the barrel 1 have good sealing effect.

[0029] The embodiment is provided with a filter screen supporting protrusion 5 on the inner wall of the end cover 2, which extends from the inner wall of the end cover 2 into the barrel 1, and the extending direction of the filter screen supporting protrusion 5 is parallel to the axis of the end cover 2. The filter screen supporting protrusion 5 is used to support the filter screen 4, prevent the filter screen 4 from adhering to the inner wall of the end cover 2 during exhaust, cause poor exhaust, and affect the exhaust efficiency.

[0030] As shown in Figure 2 and Figure 3As shown, the filter support protrusion 5 in this embodiment is a cylinder with a circular cross-section, and the filter support protrusions 5 are symmetrically distributed around the center of the end cap 2. In this embodiment, two rings of filter support protrusions 5 are provided around the center of the end cap 2, with a total of four filter support protrusions 5 in each ring. The filter support protrusions 5 are evenly spaced along the circumference. Adjacent rings of filter support protrusions 5 can be staggered or aligned. In this embodiment, adjacent rings of filter support protrusions 5 are aligned radially along the end cap 2. The diameter (outer diameter) of the filter support protrusion 5 can be 1mm to 5mm.

[0031] In some embodiments, the end of the filter support protrusion 5 can be rounded to form a rounded portion, thereby preventing the end of the filter support protrusion 5 from being too sharp and puncturing the filter 4 when supporting the filter 4. There is at least one filter support protrusion 5, which protrudes from the inner side of the end cap 2 and can lift the filter 4 to provide support, preventing the filter 4 from sticking to the inner side of the end cap 2 and affecting the smoothness of exhaust.

[0032] Preferably, the ends of the filter support protrusions 5 extending into the cylinder 1 are flush with each other, thereby preventing the filter 4 from being uneven when supporting it. Furthermore, the ends of the filter support protrusions 5 extend beyond the end face of the end cap 2, which can better support the filter 4 and prevent the filter 4 from sticking to the inner surface of the end cap 2.

[0033] Example 2

[0034] like Figure 4 As shown, the difference between this embodiment and embodiment 1 is that this embodiment only sets one ring of filter support protrusions 5, and the eight filter support protrusions 5 are evenly spaced along the circumference.

[0035] Example 3

[0036] like Figure 5 As shown, the difference between this embodiment and embodiment 2 is that this embodiment has four filter support protrusions 5 that are evenly spaced along the circumference.

[0037] Example 4

[0038] like Figure 6 As shown, the difference between this embodiment and Embodiment 3 is that the filter support protrusion 5 in this embodiment is an arc-shaped sheet. The concave surface of the arc-shaped sheet faces the center of the end cap 2.

[0039] Example 5

[0040] like Figure 7 As shown, the difference between this embodiment and embodiment 3 is that the cross-sectional shape of the filter support protrusion 5 in this embodiment is elliptical, that is, the filter support protrusion 5 is an elliptical cylinder.

[0041] During the exhaust process of the blood perfusion device, the filter screen 4 has a tendency to stick to the inner side of the end cover 2, and the filter screen support protruding part 5 is arranged on the inner side of the end cover 2 and protrudes into the cylinder body 1, the end of the filter screen support protruding part 5 can abut against the filter screen 4 to fix the shape of the filter screen 4, maintain the interval space between the filter screen 4 and the end cover 2, prevent the filter screen 4 from closely sticking to the inner surface of the end cover 2, and also avoid the filter screen 4 from being in a state of wave fluctuation with the air bubbles, which is not conducive to the air passing through the filter screen 4 and the end cover 2, under the support of the filter screen support protruding part 5, the air can smoothly pass through the filter screen 4 and the end cover 2, and smoothly pass through the blood nozzle and be discharged outward, so as to improve the exhaust efficiency of the blood perfusion device.

[0042] The above description of disclosed embodiments enables those skilled in the art to carry out or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A hemoperfusion device, including: A cylindrical body, end caps disposed at both ends of the cylindrical body, and a filter screen disposed between the end caps and the cylindrical body; characterized in that: The inner side of the end cap is provided with a filter support protrusion that protrudes into the cylinder.

2. The blood perfusion device as described in claim 1, characterized in that: The extension direction of the filter support protrusion is parallel to the axis of the end cap.

3. The blood perfusion device as described in claim 1, characterized in that: At least two of the filter support protrusions are circumferentially spaced around the center of the end cap.

4. The blood perfusion device as described in claim 3, characterized in that: The end cap is provided with at least two rings of filter support protrusions, with adjacent rings of filter support protrusions being staggered or aligned with each other.

5. The blood perfusion device as described in claim 3, characterized in that: The ends of the filter support protrusions are flush with each other.

6. The blood perfusion device as described in claim 1, characterized in that: The end of the filter support protrusion has a rounded portion.

7. The blood perfusion device as described in claim 1, characterized in that: The outer diameter of the filter support protrusion is 1mm to 5mm.

8. The blood perfusion device as described in claim 1, characterized in that: The filter support protrusion is a circular or elliptical cylinder.

9. The blood perfusion device as described in claim 1, characterized in that: The filter support protrusion is an arc-shaped sheet.

10. The blood perfusion device as described in claim 9, characterized in that: The concave surface of the sheet faces the center of the end cap.

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