JP2572363Y2 - Extracorporeal circuit filter and drip chamber - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter used as a component of an extracorporeal circuit and an improvement of a drip chamber equipped with the filter.

[0002]

2. Description of the Related Art At present, a filter mounted and used in a blood circuit chamber is, for example, a cylindrical filter 21 as shown in FIG.
Thus, the top portion 23 is formed flat, and the opening is not formed.

[0003] Therefore, a body fluid is introduced into the chamber,
When sequentially discharging body fluids downstream of the chamber, there are the following problems. The minute air bubbles that are rolled up at the same time as the introduction of the body fluid are formed on the flat top 23 of the filter 21.
There was a case where it could not be easily removed even if a slight shock was applied from the outside to adhere to the inside of the chamber and expel it to the upper space of the chamber. Since the outside of the top portion 23 is also flat, this serves as a baffle board, and prevents the bodily fluid from flowing smoothly in the downstream direction of the chamber.
For these reasons, there is a concern that blood coagulation or the like may occur around the upper part 23. Therefore, the present inventors have made intensive studies to solve the above-mentioned problems, and as a result, have arrived at the following invention.

[0004]

Means for Solving the Problems [1] The present invention relates to a main body 5
Block-shaped top part 3 with no opening formed on it
With the top P1 outside the top 3
A slope 4a inclined downward is formed on at least both sides thereof.
Then, the lower top P2 is centered inside the
At least a body with a slope 4b inclined upwards on both sides
An external circulation circuit filter 1 is provided. [2] The present invention has the top 3 described in [1],
Extracorporeal circuit whose mesh is mainly made of synthetic resin
Provide filters for [3] The present invention has the top 3 described in [1], and
Molded product made of hard resin, supported on the lower part of the main body 5
Provide a filter 1 for extracorporeal circulation circuit formed with a ring 2
I do.

[4] In the present invention, the upper part of the chamber body 6 is provided.
With the cap 7 and the lower cap 8 attached, the chamber body
6. The drip with the filter according to [2] welded to the lower part of
Provide a chamber. [5] In the present invention, an upper cap 7 is
Attach the lower cap 8 and describe [3] on the lower cap 8
With the support ring 2 of the filter 1
A member 10 is provided.

[0006]

[Action] microbubbles introduced into drip chamber 10 with a new body fluid, through the outer filter 1 also enters the inside of the filter 1 along the inclined surface 4b of the inner top upper 3, the drip chamber 10 It is discharged to the upper space. Further, even when the body fluid newly introduced into the drip chamber 10 reaches the vicinity of the top 3, it flows smoothly to the downstream of the drip chamber 10 along the outer slope 4 a .

[0007]

1 is a schematic view of a filter 1 according to the present invention.
You.The filter 1 has an opening formed on the body 5.
Attach a block-shaped top 3 without
With the top P1 as the center, at least on both sides in a downward direction
A slope 4a is formed, and a lower top is formed inside the top 3
Slant upward at least on both sides around P2
The inclined surface 4b is formed.Filter 1Body 5
Is, for example, polypropylene, polyester, nylon
A mesh-like material mainly composed of synthetic resin such as
Alternatively, hard vinyl chloride resin, polycarbonate, etc.
A molded article made of a high quality resin may be used. In short, it's shown in Figure 1.
Sea urchinA block in which no opening is formed in the upper part of the main body 5
ShapeA slope having a top section 3 and inclined to the top section 34a,
4bFormdidIf any, other shapes, constituent materials
Can be anything. In the present invention, the slope4a, 4bIs also a curved surface
It may be linear or curved. in short
Shape that air bubbles are hard to adhere to and guide body fluid flow smoothly
Anything is fine.

At the lower end of the filter 1, there is formed a support ring 2 which is fitted into the inner diameter of a lower cap 8 of a drip chamber 10 to be described later. The support ring 2
The filter 1 is appropriately formed depending on the type of the filter 1, particularly when the filter 1 is a molded product. On the other hand, when the whole body 5 is a mesh-like fiber product, the support ring 2 does not need to be formed because it is welded to the lower part of the chamber body 6 .

FIG. 2 is a schematic view of a drip chamber 10 equipped with the filter 1 of FIG. The drip chamber 10 includes a chamber main body 6 and an upper cap 7 and a lower cap 8 attached thereto. The upper cap 7 has a body fluid inlet 9 to which a body fluid inlet tube 13 is connected, a connection port 12 for a liquid level adjustment line 14, and a connection port 11 for a pressure measurement line 15. On the other hand, a bodily fluid discharge port 16 to which a bodily fluid discharge tube 17 is connected is formed in the lower cap 8. The lower end (the support ring 2) of the filter 1 is fitted into the inner diameter of the lower cap 8.

[0010] In order to fix each component constituting the drip chamber 10 , a fitting method may be used, or the drip chamber 10 may be fixed by using blocking by heat sterilization.
Further, as a constituent material of each part, any material having good biocompatibility can be used other than, for example, polyvinyl chloride, polycarbonate and the like.

Next, a method of using the filter 1 of the present invention and the drip chamber 10 equipped with the filter 1 will be described. New fluid introduced from the fluid inlet 9 into the chamber body 6, when reaching near the top upper portion 3 of the filter 1 as shown in FIGS. 2 and 3, slopes 4a which is inclined top upper 3 outside of the lower The fluid flows smoothly downward along the line and is discharged from the body fluid discharge port 16 through the filter 1.

Further, bubbles that are introduced are caught up with new fluid within the filter 1 is raised along the slope 4b inclined upwardly Tenjobu 3 inner 4,
It is discharged to the upper space of the drip chamber 10 through the upper part of the main body 5 .

[0013]

As described above, according to the present invention, since the air bubbles do not remain in the filter 1 and the bodily fluid introduced into the drip chamber 10 is smoothly discharged without stagnation, the blood is removed. There is no risk of coagulation or the like, and it can be used for treatment with a sense of security.

[Brief description of the drawings]

FIG. 1 is a schematic view of the filter of the present invention.

FIG. 2 is a schematic view of a drip chamber equipped with the filter of FIG. 1;

FIG. 3 is a diagram showing a use state of the filter.

FIG. 4 is a diagram showing a use state of the filter.

FIG. 5 is a schematic diagram of a conventional filter.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Filter 2 Support ring 3 Top part 4a Slope 4b Slope 5 Main body 6 Chamber main body 7 Upper cap 8 Lower cap 10 Drip chamber P1 Upper top part P2 Lower top part

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) A61M 1/14 530 A61M 5/165 A61M 5/36

Claims (5)

(57) [Scope of request for utility model registration] An opening is not formed on a main body.
Attach the block-shaped top 3 and summit it outside the top 3
The portion P1 is centered at least on both sides in a downward direction.
A slanted slope 4a is formed, and the lower part P2 is formed inside
That both sides have slopes 4b that are inclined upward.
A filter 1 for an extracorporeal circuit. 2. A main body 5 having a top portion 3 according to claim 1.
Extracorporeal circuit whose mesh is mainly made of synthetic resin
Filter. 3. A top part 3 according to claim 1, which is entirely
Molded product made of hard resin, supported on the lower part of the main body 5
An extracorporeal circuit filter 1 in which a ring 2 is formed. 4. An upper cap 7 and a lower cap 7
Attach the part cap 8 and request at the lower part of the chamber body 6
A drill characterized in that the filter according to (2) is welded.
Chamber. 5. An upper cap 7 and a lower cap 7
The lower cap 8 is attached to the lower cap 8.
The support ring 2 of the filter 1 is fixed.
Drip chamber 10.