JPH0576444U - Extracorporeal circuit filter-and drip chamber- - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To improve a filter used as a part of an extracorporeal circulation circuit and a drip chamber in which the filter is mounted. [Structure] Extracorporeal circulation circuit filter-1 in which an inclined slope 4 is formed on the ceiling 3, and an upper cap 7 and a lower cap 8 are attached to the chamber body 6 of the chamber-body 6 In, there is provided a drip chamber-5 equipped with the filter-1 described above. [Effect] Air bubbles do not remain in the filter-1,
In addition, since the body fluid introduced into the drip chamber 5 is also discharged smoothly without staying, there is no risk of blood coagulation or the like, and it can be safely used for treatment.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improvement of a filter used as a part of an extracorporeal circulation circuit and a drip chamber equipped with the filter.

[0002]

[Problems to be Solved by Prior Art and Invention]

 The filter currently mounted and used in the blood circuit chamber is, for example, a cylindrical filter 21 as shown in FIG. 5, in which the ceiling 23 is formed flat and no aperture is formed. ..

Therefore, when introducing the body fluid into the chamber and sequentially discharging the body fluid downstream of the chamber, there are the following problems. The minute air bubbles that are trapped at the same time as the introduction of body fluid adhere to the inside of the flat upper part 23 of the filter 21 and are easily ejected to the upper space of the chamber even if a light shock is given from the outside. There were cases where it could not be removed. Since the outer side of the ceiling 23 is also flat, this serves as a baffle board, which prevents bodily fluids from flowing smoothly in the downstream direction of the chamber. Because of these, there is a concern that blood coagulation or the like may occur around the ceiling 23. Therefore, the present inventor has made extensive studies in order to solve the above problems and, as a result, arrived at the next inventor.

[0004]

[Means for Solving the Problems]

 The present invention provides an extracorporeal circulation circuit filter-1 (hereinafter abbreviated as "filter-1") in which an inclined slope 4 is formed on the ceiling 3.

Further, the present invention relates to a drip chamber for an extracorporeal circulation circuit (hereinafter abbreviated as drip chamber) in which an upper cap 7 and a lower cap 8 are attached to the chamber body 6 in the chamber body 6. The present invention provides a drip chamber 5 equipped with the filter-1.

[0006]

[Action]

 Even if the minute air bubbles introduced into the drip chamber-5 along with the new body fluid enter the inside of the filter-1, they pass through the outside of the filter-1 along the inside slope 4 of the ceiling 3 and the outside of the drip chamber-5. 5 is discharged to the upper space. Moreover, the body fluid newly introduced into the drip chamber-5 flows smoothly to the downstream of the drip chamber-5 along the outer slope 4 even when it reaches the vicinity of the ceiling 3.

[0007]

【Example】

 FIG. 1 is a schematic view of the filter-1 of the present invention. The filter-1 may be, for example, a mesh-shaped one mainly made of synthetic resin such as polypropylene, polyester, nylon or the like, or a molded product made of a hard resin such as a hard vinyl chloride resin or a polycarbonate. .. In short, as long as it has the top 3 as shown in FIG. 1 and can form the inclined slope 4 on the top 3, any other shape and material may be used. The slope 4 of the top 3 is formed so that the outside is inclined downward and the inside is inclined upward. In the present invention, the slope 4 includes a curved surface, which may be linear or curved. In short, any shape may be used as long as it is difficult for bubbles to adhere and the flow of bodily fluid is smoothly guided.

At the lower end of the filter-1, there is formed a support ring 2 which is fitted into the inner diameter of the lower cap 8 of the drip chamber-5 which will be described later. The support ring 2 is appropriately formed depending on the type of the filter-1, and particularly when the filter-1 is a molded product, it is formed. On the other hand, when the entire filter-1 is a mesh-shaped fiber product, it is not necessary to form the support ring 2 because it is welded to the lower part of the chamber.

FIG. 2 is a schematic view of a drip chamber-5 equipped with the filter-1 of FIG. The drip chamber-5 is composed of a chamber body 6, an upper cap 7 and a lower cap 8 attached to the chamber body 6. The upper cap 7 is provided with a body fluid introduction port 9 to which the body fluid introduction tube 13 is connected, a connection port 11 for a liquid level adjusting line 14, and a connection port 11 for a pressure measuring line 15. On the other hand, the lower cap 8 is formed with a body fluid discharge port 16 to which a body fluid discharge tube 17 is connected. The lower end portion (support ring 2) of the filter -1 is fitted into the inner diameter portion of the lower cap 8.

The components forming the drip chamber-5 may be fixed by a fitting method or by blocking by heat sterilization. Further, as the constituent material of each component, any material having good biocompatibility other than polyvinyl chloride, polycarbonate, etc. can be used.

Next, a method of using the filter-1 of the present invention and the drip chamber-5 equipped with the filter-1 will be described. The new body fluid introduced from the body fluid inlet 9 into the chamber body 6 tilts downward outside the top 3 when reaching the vicinity of the top 3 of the filter 1 as shown in FIGS. 2 and 3. It flows in a smooth downward direction along the slope 4, passes through the inside of the filter-1, and is discharged from the body fluid discharge port 16.

Further, as shown in FIG. 4, the air bubbles that have been introduced into the filter-1 by being entrained together with new body fluid rise along the slope 4 that is inclined upward inside the ceiling 3 and the filter-1 And is discharged to the upper space of the drip chamber-5.

[0013]

[Effect of the device]

 As described above, according to the present invention, air bubbles do not remain in the filter-1, and the body fluid introduced into the drip chamber-5 is discharged to the smooths without staying. It can be used for treatment without anxiety.

[Brief description of drawings]

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

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

FIG. 3 is a diagram showing a usage state of a filter.

FIG. 4 is a diagram showing a usage state of a filter.

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

[Explanation of symbols]

 1 Filter-2 Support ring 3 Top 4 Slope 5 Drip chamber-6 Chamber-Main body 7 Upper cap 8 Lower cap

Claims (2)

[Scope of utility model registration request] 1. An extracorporeal circulation circuit filter-1 (hereinafter abbreviated as "filter-1"), wherein an inclined slope 4 is formed on the ceiling 3. 2. The filter according to claim 1, wherein a drip chamber for an extracorporeal circulation circuit, in which an upper cap 7 and a lower cap 8 are attached to the chamber body 6 on the chamber body 6 (hereinafter abbreviated as drip chamber). A drip chamber-5 equipped with -1.