JPH06343694A - Blood storing tub - Google Patents

Abstract

PURPOSE:To provide a blood storing tub which can prevent the blood flowing in from a blood influx port of the blood tub from producing bubbles in tone space to the surface of the blood stored in the blood storing part in the tub when blood is going top flow in. CONSTITUTION:A blood storing tub is composed of a blood inlet 3, a blood influx part 11 in communication with the blood inlet, 3, a blood storing part 4 which is installed below the blood influx part 11 and to which blood flows in from the influx part 11 to be stored, a blood inducing part 9 which induces the blood from the influx part 11 to the storing part 4, and a blood exhaust port 5 which is in communication to the lower part of the storing part 4, wherein the blood inducing part 9 has a plurality of guide paths 6 which divide the blood stream flowing in the inducing part 9 and falling down toward the storing part 4 into a plurality of blood stream sections.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blood reservoir for temporarily storing blood in an extracorporeal blood circulation circuit used for artificial lungs and the like.

[0002]

2. Description of the Related Art In recent years, an extracorporeal circulation circuit incorporating an artificial lung has been used in order to remove carbon dioxide in blood and add oxygen to blood in place of a living lung during open heart surgery. In this extracorporeal circulation circuit, the blood pump is operated to remove blood from the patient's vein, and after performing gas exchange with the artificial lung,
Extracorporeal blood circulation is performed to return this blood to the patient's artery. Furthermore, the extracorporeal circulation circuit is provided with a cardiotomy line that draws blood from the operative field, removes foreign substances, and then returns blood. Then, in such an artificial lung extracorporeal blood circulation circuit, a blood reservoir for temporarily storing the removed blood or blood sucked from the operative field is filtered and temporarily stored. A cardiotomy reservoir is installed for the purpose of adjusting the blood volume in the circuit and providing a buffering function for keeping the blood return volume constant. By the way, in such a blood storage tank, when the blood storage amount becomes too small, troubles such as air bubbles are likely to occur, so when the blood storage is low,
In particular, it is necessary to constantly monitor the blood surface, and it is desirable that the blood storage amount or changes in the blood storage amount can be grasped accurately and easily. As such a blood storage tank, a protruding portion is provided by protruding a part of the bottom surface (the portion where the blood discharge port is provided) downward to form a portion having a small cross-sectional area inside the blood storage tank. There has been proposed a blood storage tank capable of accurately grasping a blood storage amount or a change in the blood storage amount during blood storage.

[0003]

However, in the blood reservoir having such a protruding portion, the blood stored in the protruding portion when the blood from the operative field or the blood that has been removed flows down into the protruding portion. There is a risk that air bubbles may be generated between the blood storage surface and the blood storage surface, and the air bubbles mixed in the blood may be returned to the human body via the extracorporeal circulation circuit. Therefore, an object of the present invention is that, when the blood flowing from the blood inlet of the blood reservoir flows into the blood reservoir inside the blood reservoir, bubbles are generated between the blood and the blood storage surface of the blood stored inside the blood reservoir. To provide a blood reservoir capable of preventing the generation of blood.

[0004]

To achieve the above object, a blood inlet, a blood inflow portion communicating with the blood inlet, and a blood inflow portion provided below the blood inflow portion are provided. Has a blood storage portion that flows down and is stored, a blood guide portion that guides blood from the blood inflow portion to the blood storage portion, and a blood outlet that communicates with a lower portion of the blood storage portion, and the blood guide portion, A blood reservoir having a plurality of blood guiding paths that divide the blood flow flowing through the blood guiding portion toward the blood storing portion into a plurality of blood streams.

It is preferable that the blood guiding portion has an inclined portion whose bottom surface is inclined. Further, it is preferable that the blood guiding path is formed in the inclined portion. The blood guiding path is preferably formed by a plurality of ribs arranged in parallel. Further, it is preferable that the ribs are arranged in parallel. Further, it is preferable that the ribs are arranged in parallel at substantially equal intervals. Further, the blood guiding path may be formed by a plurality of recesses arranged in parallel. Further, it is preferable that the recesses be arranged in parallel. Further, it is preferable that the ribs are arranged in parallel at substantially equal intervals. It is preferable that the blood guiding path does not reach the bottom of the blood storing section. Further, it is preferable that the blood storage tank has a defoaming portion in order to remove air bubbles of the blood flowing into the blood inflow portion. Further, it is preferable that the blood reservoir is provided with a filter member between the blood inflow portion and the blood guiding portion, through which blood flowing out from the blood inflow portion passes. Further, it is preferable that the filter member is formed in a cylindrical shape, and the filter-side end portions of the plurality of blood guiding paths formed on the bottom surface inside the housing face the center direction of the filter.

Therefore, the blood reservoir of the present invention will be described in detail with reference to the embodiment shown in the drawings. The blood reservoir 1 of the present invention comprises a blood inlet 3 and a blood inlet 11 communicating with the blood inlet 3.
And is provided below the blood inflow part 11, and the blood inflow part 1
1 has a blood storage part 4 in which blood flows down and is stored, a blood guiding part 9 which guides blood from the blood inflow part 11 to the blood storage part 4, and a blood discharge port 5 which communicates with a lower part of the blood storage part 4, The blood guiding unit 9 has a plurality of blood guiding paths 6 that divide the blood flow flowing through the blood guiding unit 9 toward the blood storage unit 4 into a plurality of blood flows.

The blood reservoir of the present invention will be described in detail below with reference to the embodiments shown in FIGS. 1 is a perspective view of an embodiment of the blood reservoir of the present invention, FIG. 2 is a front view of an embodiment of the blood reservoir of the present invention, and FIG. 3 is an embodiment of the blood reservoir of the present invention. FIG. 4 is a left side view of the example, and FIG.
5 is a sectional view taken along the line BB in FIG. 2, and FIG. 6 is a sectional view taken along the line CC in FIG. The blood reservoir 1 of this embodiment has a housing 2 composed of a housing body 2a and a lid body 2b, and the lid body 2b covers the upper opening of the housing body 2a as shown in FIG. It is fitted to the upper end of the housing body 2a. A filter member 10 is provided inside the housing 2a. The housing body 2a has a protruding portion 12 protruding downward and a blood discharge port 5 provided in a lower portion of the protruding portion 12, and the lid body 2b has a blood introducing port 3a, as shown in FIG. 3b, air outlets 7a and 7b, and blood introduction tube 8
have. Then, in the housing body 2a, a blood inflow portion 11 defined by the filter member 10 and formed inside thereof, a blood reservoir 4 formed by the inner surface of the protruding portion 12, and an inner surface of the housing 2a are formed, Blood guiding section 9 for guiding blood from blood inflow section 11 to blood storing section 4.
Is provided.

The protruding portion 12 is provided to enable accurate and easy understanding of the blood storage amount or changes in the blood storage amount during low blood storage. For example, in the embodiment shown in FIG. It is formed so as to project downward. In addition,
As in this embodiment, the projecting portion 12 has the housing main body 2
It is not limited to that formed on one end portion of the bottom surface 2c of a,
For example, it may be formed at the center of the bottom surface 2c of the housing body 2a. The blood guiding section 9 includes a blood inflow section 11,
Specifically, it has a function of guiding the blood that has passed through the filter member 10 to the blood storage unit 4. The blood guiding portion 9 includes a very short horizontal portion 9b through which blood flowing out from the blood inflow portion 11 (filter member 10) flows horizontally, an inclined portion 9a continuous with the horizontal portion 9b, and a vertical portion continuous with the inclined portion 9a. It has a portion 9c. As shown in FIG. 1, blood guiding portion 9 is formed by a part of the inner bottom surface of housing 2a. Further, by forming the inclined portion 9a, it is possible to further reduce the generation of bubbles when the blood flows down into the protruding portion 12, in other words, into the blood storage portion 4. The angle of the inclined portion 9a with respect to the horizontal direction is preferably 1 ° to 89 °, more preferably 30 ° to 60 °.

As shown in FIG. 1, the blood reservoir 1 of the present invention has a blood guiding portion 9 formed inside a housing 2.
Further, it has a plurality of blood guiding paths 6 that divide the blood flow flowing through the blood guiding portion 9 and flowing down toward the blood storing portion 4 into a plurality of blood streams. By dividing the blood flow flowing through the blood guiding portion 9 into a plurality of blood flows by the plurality of blood guiding paths 6, one blood flow becomes small and a partially concentrated blood flow is prevented from being formed. To do. Therefore, it is possible to prevent bubbles from being generated between the blood flowing from the blood guiding portion 9 to the blood storing portion 4 and the blood storing surface of the blood stored inside the blood storing portion 4. Since the blood reservoir of the present invention has such a blood guiding path 6, the blood that has flowed into the housing is dispersed without being concentrated in a part, so that the blood flow spreads and the blood guiding portion 9 is discharged. It easily flows down the inner surface (which is also the inner surface of the blood reservoir 4 in part). Therefore, it is possible to prevent bubbles from being generated between the blood storing surface of the blood storing portion 4 and the blood storing surface.

In the embodiment shown in FIGS. 1 to 6, the blood guiding portion 9 has a very short horizontal portion 9b through which the blood flowing out from the blood inflow portion 11 (filter member 10) flows horizontally, and this horizontal portion 9b is continuous. Inclined portion 9a and this inclined portion 9a
It has a vertical portion 9c continuous with. The blood guiding path 6 has one end in the horizontal portion 9b of the blood guiding portion 9, passes through the inclined portion 9a of the blood guiding portion 9, and reaches the vertical portion 9c of the blood guiding portion 9. Since the horizontal portion 9b has the starting end of the blood guiding path 6, the blood flow can be divided in a state where gravity is not so much, and the blood flow can be surely divided. Although the blood guiding path 6 is preferably provided as described above, the blood guiding path 6 may not be provided in the vertical portion 9c or may be provided only in the inclined portion 9a.

In the blood reservoir of this embodiment, the blood guide path 6 is formed by a plurality of ribs 19 arranged side by side. That is, a plurality of ribs 19 are arranged horizontally on the bottom surface (horizontal portion 9 b) inside the housing 2 and downward on the inner side surface of the protruding portion 12. A blood guiding path 6 is formed in the gap. Specifically, the width of the rib 19 is 0.1 m.
m-10 mm, height 0.1 mm-50 mm, length
10 mm to 300 mm, the number is 1 to 100, and preferably the width is 0.5 mm to 5 mm and the height is
The length is 1 mm to 10 mm, the length is 20 mm to 250 mm, and the number is 3 to 30.

Further, the ribs 19 are preferably arranged in parallel, and are preferably arranged at substantially equal intervals. By arranging the plurality of ribs 19 in such a manner, the blood that has flowed into the blood reservoir 1 can be almost evenly transmitted to the inner surface and flow down, and the generation of bubbles can be further prevented. Further, in consideration of the state of the blood flow flowing out from the filter member 10, the rib 19 has a large center portion and a small number of side surface sides of the housing 2a. The central portion may be narrower and the width may be wider toward the side surface side. In particular, as in this embodiment, the filter member 1
When 0 has a columnar shape, it is often preferable to do this.

The blood discharge port 5 communicates with the lower portion of the blood storage unit 4 and discharges the blood in the blood storage tank 1 to the outside. An artificial lung (not shown) is attached to the blood outlet 5.
Alternatively, a tube (not shown) for allowing blood to flow into the oxygenator via a heat exchanger (not shown) is connected. A blood pump is provided in this tube, and blood is sent to an artificial lung or the like by this blood pump. In this embodiment, the blood outlet 5 is provided at the bottom of the protrusion 12.

The blood inlet 3 is connected to a cardiotomy line for sending blood from the operative field or a blood removal line for sending blood from a blood removal cannula inserted into the patient's ascending and descending veins. . In this embodiment, the blood inlet 3
a is connected to the blood removal line, and blood inlet 3b is connected to the cardiotomy line.

The blood introducing tube 8 is for introducing the blood introduced into the blood reservoir 1 from the blood introducing port 3 into the blood inflow portion 11 formed in the filter member 10 described later. In this embodiment, the blood introducing tube 8 has a lower half portion 8a formed in a cylindrical shape as shown in FIG.
The upper half portion 8b is formed in a funnel shape whose diameter decreases downward.

As shown in FIG. 4, the air discharge port 7 is for discharging the bubbles that have flowed into the defoaming portion 13 described later to the outside. In this embodiment, as shown in FIG. In the vicinity of the upper end of the defoaming section 13, two horizontally, 7a, 7
b is formed.

Further, in the blood reservoir 1 of this embodiment, as shown in FIG.
As shown in, a defoaming portion 13 filled with a defoaming member 14 is provided near the upper portion of the outer peripheral portion of the blood introducing tube 8.
Below the defoaming unit 13, a bubble inflow port 15 for inflowing bubbles or air is formed in an annular shape, and the defoaming unit 13 and the blood inflow unit 11 are connected via this bubble inflow port 15. It is configured to communicate. Further, the blood inflow portion 11 and the outside of the housing 2 are configured to communicate with each other via the air outlets 7a and 7b and the bubble inflow port 15 described above.

As the member constituting the housing 2, for example, polycarbonate, acrylic resin, polyethylene terephthalate, polyethylene, polypropylene, polystyrene, polyvinyl chloride, acryl-styrene copolymer, acryl-butadiene-styrene copolymer and the like are preferable. Can be used for Particularly, polycarbonate, acrylic resin, polystyrene, and polyvinyl chloride are preferable.

Inside the housing 2, as shown in FIG. 4, a blood reservoir 4 for temporarily storing blood.
Are formed. The volume of the blood storage unit 4 is not particularly limited, but for adults, it is usually 3000 to 5000 ml.
It is about 1000 ml to 2500 ml for children. Further, the housing 2 is preferably substantially transparent or translucent so that the amount of stored blood and the state of blood stored inside can be easily confirmed. Further, as shown in FIG. 2, on the front surface or the side surface of the housing body 2a,
It is preferable that a scale indicating the blood storage amount is provided.

As described above, the inside of the defoaming section 13 is filled with the defoaming member 14 for defoaming when blood containing bubbles flows in. Examples of the defoaming member 14 include foam such as foamed polyurethane, foamed polyethylene, foamed polypropylene, and foamed polystyrene, mesh, woven cloth, non-woven cloth, or various porous bodies such as sintered bodies such as porous ceramics and resin. It can be preferably used. In particular, a material having a relatively low air passage resistance (pressure loss) is suitable. When a foam such as polyurethane foam or other porous material is used as the material having a low air flow resistance, the pore diameter is 20 μm to 10 mm, particularly 50 μm.
It is preferably about m to 5 mm.

Further, it is preferable that such a defoaming member 14 carries an antifoaming agent having a function of breaking the bubbles when the bubbles come into contact with each other. As the antifoaming agent, silicone (compound type containing silica, oil type, etc.) is suitable. As a method of supporting the defoaming agent on the defoaming member, a method of impregnating the defoaming member in a liquid containing the defoaming agent, applying or spraying a liquid containing the defoaming agent, and drying (for example, 30 ° C., 180 minutes).

A filter member 10 is arranged below the defoaming section 13. This filter member 10
Is for removing foreign matters and bubbles in blood,
In this embodiment, as shown in FIG. 6, it is formed and arranged in a cylindrical shape on the outer circumference of the blood introducing tube 8. Specifically, as shown in FIG. 4, the filter member 10 has its upper end fixed to the lower side of the defoaming portion 13 with the filler 16 and its lower end to the inner peripheral portion of the bottom member 17 with the filler 16. It is fixed. The inside of the housing 2 is divided into the blood inflow portion 11 and the inner space 18 by the filter member 10. Further, the blood reservoir 1 of this embodiment is configured such that the lower end of the blood introducing tube 8 is located inside the blood inflow portion 11.

As the material of the filter member 10, a porous material having sufficient blood permeability is suitable. As the porous material, a mesh (net) -like material, woven cloth,
Nonwoven fabrics and the like can be used, and these can be used alone or in any combination (in particular, laminated). Specifically, polyester such as PET and PBT, nylon (polyamide), tetron, rayon, polyolefin such as polypropylene and polyethylene, polymer material such as polyvinyl chloride, or a combination of two or more of them. Is preferable, but metal materials such as aluminum and stainless steel can also be used. Particularly, polyester, polypropylene, polyethylene, and stainless steel are suitable.

The opening of the mesh of the mesh used for the filter member 10 is preferably about 15 to 300 μm, particularly 20 to 200 μm. If it is more than 300 μm, fine bubbles may permeate the mesh network together with blood, and if it is less than 15 μm,
This is because the passage resistance of blood increases and the blood tends to stay in the blood inflow portion 11. The filter member 1
In order to improve blood permeability, it is preferable that 0 is subjected to a hydrophilic treatment such as plasma treatment or coating of a hydrophilic polymer material, if necessary. The filter member 10 as described above can effectively remove bubbles having a diameter of about 20 μm or more.

Next, another embodiment of the blood reservoir of the present invention shown in FIGS. 7 and 8 will be described. 7 is a sectional view of another embodiment of the present invention cut at the same position as FIG. 5, and FIG. 8 is a sectional view of another embodiment of the present invention cut at the same position as FIG. FIG. The difference between the blood reservoir 50 of this embodiment and the blood reservoir 1 shown in FIGS. 1 to 6 is that
The blood guiding path 6 provided in the blood guiding portion 9 of the blood reservoir 1
The blood guiding path 6 of the blood guiding portion 9 of the blood storage tank 50 is formed by a plurality of recesses 51 arranged in parallel, while the ribs 19 are formed by a plurality of ribs 19, and the other points are the same. . That is, in the blood storage tank 50, the plurality of concave portions 51 are
On the bottom surface 2c inside the housing 2, in the horizontal direction,
Further, the inner surface of the protruding portion 12 is arranged downward, and these concave portions 51 form the blood guiding path 6. Specifically, the width of the recess 51 is 0.1 mm to
200 mm, depth 0.1 mm to 50 mm, length
10 mm to 300 mm, the number is 2 to 100, and preferably the width is 1 mm to 50 mm and the depth is 1.
mm to 10 mm, length is 20 mm to 250 mm, and the number is 4 to 30.

The recesses 51 are preferably arranged in parallel, and the recesses 51 are preferably arranged at substantially equal intervals. By arranging the plurality of recesses 51 in such a manner, the blood that has flowed into the blood storage tank 50 can be almost evenly transmitted to the inner surface and flow down, and the generation of bubbles can be further prevented. In consideration of the state of blood flow flowing out from the filter member 10, the recess 51 has a width of the recess 51 (width of the blood guiding path 6) when the central portion is large and the side surface side of the housing 2a is small.
However, it may be formed so that the central portion is narrow and widens toward the side surface. In particular, when the filter member has a columnar shape as in this embodiment, it is considered preferable to do so in many cases.

It is preferable that the blood guide path 6 does not reach the bottom of the protrusion 12 as shown in FIG. As a result, it is possible to prevent the blood from directly hitting the bottom of the protruding portion, and it is possible to further prevent the generation of bubbles. In addition, as shown in FIG. 7 or FIG.
It is preferable that the bottom surface 2c of the housing 2 or the lower portion of the inner surface of the protrusion 12 is provided so as not to form a step. As a result, blood can smoothly flow into the recess 51, and it is possible to prevent bubbles from being generated due to the drop.

Further, another embodiment of the blood reservoir of the present invention shown in FIG. 9 will be described. FIG. 9 is a sectional view when another embodiment of the present invention is cut at the same position as in FIG.
The difference between the blood reservoir 60 of this embodiment and the blood reservoir 1 shown in FIGS. 1 to 6 is that the blood guiding portion 6 of the horizontal portion 9b of the blood guiding portion 9 extends along the radiation of the filter member 10. It is the point that is formed. In other words, the starting ends of the plurality of blood guiding portions 6 face the center of the filter member 10. Specifically, the ribs 19 forming the blood guiding path 6 on the bottom surface 2c of the housing 2 are located on the radiation of the filter member 10, in other words, the starting ends of the ribs 19 are located at substantially the same position in the center direction of the filter member 10. It is facing.
That is, the rib 19a on the center side is provided in parallel to the blood guiding portion 9, but the starting end of the rib 19b on the side surface side of the housing with respect to 19a is on the starting end side of the rib 19a (center side of the filter member 10). It is diagonally facing. Further, a rib 19c on the side of the housing from 19b is provided.
The starting end of the rib 19a is more inclined than the rib 19b toward the starting end side of the rib 19a (center side of the filter member 10). Thus, the blood reservoir 60 of this embodiment
The blood guiding path 6 provided in the horizontal portion 9b of the blood guiding portion 9 is formed along the radiation of the cylindrical filter member 10, so that the blood flowing out from the filter member 10 flows out Are dispersed along and flow down to the blood reservoir 4, and the blood having different directions existing on the bottom surface 2c inside the housing 2 does not hinder the flow, and thus the blood concentrates and flows down the blood guiding portion 9. It is possible to further prevent the generation of bubbles.

(Example) Using a polycarbonate, a blood reservoir having a shape as shown in FIG. 3 was prepared. In addition, a housing having an angle (R) of the inclined portion of 20 ° is formed.
On the inner surface of the housing, ribs (width 3 m
m, height 5 mm, length 150 mm, number of pieces 8 and arrangement interval 10 mm).

Comparative Example A blood reservoir having a shape as shown in FIG. 3 was prepared using polycarbonate. The angle of the inclined portion (R) The angle of the inclined portion (angle between the inclined portion and the vertical line)
Had a 20 ° protrusion and no ribs were provided on the inner surface of the housing.

(Experiment) Using the blood reservoirs of the above-mentioned Examples and Comparative Examples, blood (cow blood) was flown from the bottom of the housing to the lower part of the protrusion at a flow rate of 1 l / min to 5 l / min for 5 times each.
It was made to flow once (the flow rate was gradually increased by 1 l / min), and the generation state of bubbles was observed on the blood storage surface below the protrusion. (Experimental Results) In the blood reservoir of the comparative example, generation of bubbles was confirmed at a flow rate of 3 l / min, whereas in the blood reservoir of the example, generation of bubbles was not confirmed even at 5 l / min.

[0032]

Next, the operation of the blood reservoir of the present invention will be described with reference to FIG. Blood from the operative field or blood removed from the patient's vein is supplied from the blood inlets 3a and 3b to the housing 2.
When flowing in, the blood smoothly flows down along the inner surface of the upper half portion 8b of the blood introducing tube 8 and drops into the blood inflow portion 11 of the filter member 10 through the lower end opening of the lower half portion 8a. At this time, the air mixed in the blood rises and flows into the defoaming section 13 from the bubble inflow port 15. Then, the blood containing a large amount of air flowing into the defoaming unit 13 is defoamed by flowing into contact with the defoaming member 14 arranged in the defoaming unit 13, and flows down below the blood inflow unit 11. In addition, the defoaming member 14
The air captured by is discharged to the outside through the air discharge ports 7a and 7b.

On the other hand, the blood flowing into the blood inflow section 11 is
It passes through the filter member 10 and flows out to the inner space 18. At this time, foreign matter and bubbles in the blood are filtered out from the blood and remain in the blood inflow portion 11. Then, the bubbles remaining in the blood inflow portion 11 rise to the liquid surface of the blood, further rise and pass through the defoaming portion 13, and are broken by the defoaming agent carried by the defoaming member 14, The air is discharged to the outside through the air discharge ports 7a and 7b.

Then, the inner space 1 of the filter member 10
The blood that has flowed out to the inside of the housing 2 flows into the blood inflow portion 9
By the plurality of blood guiding paths 6 formed in the horizontal portion 9b of the
After being divided into a plurality of blood streams, it flows down into the blood storage unit 4 and joins with the blood stored in the blood storage unit 4. Since the blood reservoir of the present invention has such a blood guiding path 6, when the blood flows down into the blood storing portion 4, it is dispersed without being concentrated in a part, and the blood guiding portion 9 is almost evenly distributed. Since it is transmitted to and flows down, the bubbles are less likely to be generated between the blood stored in the blood storage unit 4 and the blood storage surface.

Further, the blood that has flowed into the blood reservoir 4 passes from the blood outlet 5 through the connecting tube to the artificial lung (not shown) or the heat exchanger (not shown), and then to the artificial It flows into the lungs. Then, the artificial lung returns blood to the patient. As described above, in the blood storage tank of the present invention, after the bubbles are removed by the defoaming unit 13 and the filter member 10, the blood storage unit 4
The purpose is to prevent the generation of air bubbles that occur when blood flows down inside, and by preventing the air bubbles from being generated at this stage, it is possible to prevent air bubbles from flowing into the blood vessel of the patient through the extracorporeal circulation circuit. It has a preventive action.

[0036]

The blood reservoir of the present invention is provided with a blood introducing port, a blood inflow portion communicating with the blood introducing port, and a portion below the blood inflowing portion, and blood flows down from the blood inflowing portion and is stored therein. A blood storing portion, a blood guiding portion that guides blood from the blood inflow portion to the blood storing portion, and a blood outlet that communicates with a lower portion of the blood storing portion, and the blood guiding portion includes the blood guiding portion. Since it has a plurality of blood guiding paths that divide the blood flow flowing down toward the blood storage portion into a plurality of blood flows, when the blood flowing out from the blood inflow portion flows down into the blood storage portion, Since they are dispersed without being concentrated in the blood storage portion and are dispersed and flow into the blood storage portion, it is possible to prevent bubbles from being generated between the blood stored in the blood storage portion and the blood storage surface.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment of a blood reservoir of the present invention.

FIG. 2 is a front view of an embodiment of the blood reservoir of the present invention.

FIG. 3 is a left side view of an embodiment of the blood reservoir of the present invention.

FIG. 4 is a cross-sectional view taken along the line AA of FIG.

5 is a cross-sectional view taken along the line BB of FIG.

6 is a cross-sectional view taken along the line CC of FIG.

FIG. 7 is a cross-sectional view of another embodiment of the present invention.

FIG. 8 is a sectional view of another embodiment of the present invention.

FIG. 9 is a sectional view of another embodiment of the present invention.

[Explanation of symbols]

 1 Blood Reservoir 2 Blood Inlet 2 Housing 2a Housing Main Body 2b Lid 2c Bottom 3 Blood Inlet 3a Blood Inlet 3b Blood Inlet 4 Blood Reservoir 5 Blood Outlet 6 Blood Guide 7 Air Outlet 7a Air Outlet 7b Air Outlet port 8 Blood introduction tube 8a Lower half part 8b Upper half part 9 Blood guiding part 9a Sloping part 9b Horizontal part 9c Vertical part 10 Filter member 11 Blood inflow part 12 Projection part 13 Defoaming part 14 Defoaming member 15 Bubble inflow port 16 Filling material 17 Bottom member 18 Inner space 19 Rib 50 Blood storage tank 51 Recessed portion 60 Blood storage tank

Claims (1)

[Claims] 1. A blood inlet, a blood inflow portion communicating with the blood inlet, a blood reservoir provided below the blood inflow portion, for storing blood by flowing down from the blood inflow portion, and the blood. A blood guiding part for guiding blood from the inflow part to the blood storing part; and a blood outlet communicating with the lower part of the blood storing part,
A blood reservoir, wherein the blood guiding section has a plurality of blood guiding paths that divide the blood flow flowing through the blood guiding section toward the blood storing section into a plurality of blood streams.