JPH042063B2 - - Google Patents

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a blood reservoir formed of a hard member for temporarily storing blood in an extracorporeal blood circulation circuit used in an artificial lung or the like. It is.

[Prior Art] In recent years, extracorporeal circulation circuits incorporating artificial lungs have been used in place of living lungs to remove carbon dioxide from blood and add oxygen to blood during open heart surgery. In such an extracorporeal circulation circuit incorporating an oxygenator, blood that is being circulated extracorporeally is stored, and it is used to remove air bubbles if they enter the circuit, or to prepare in case the circulating blood volume decreases due to a break in the circuit tube, etc. To,
A blood reservoir is attached. Generally, there are two types of blood reservoirs: a closed type blood reservoir made of a soft member and an open type blood reservoir made of a hard member. Closed type blood storage tanks are superior in that they do not form a blood-air interface, but on the other hand, it is difficult to achieve large-capacity blood storage, and it is difficult to accurately determine the amount of blood stored. Open type blood storage tanks are often used. In addition, the open type blood storage tank is easy to remove air bubbles during priming, easy to check the amount of blood stored, and has an ultrasonic transmitter and receiver, as well as a light emitting element and a light receiving element. It is easy to detect the amount of blood stored using the
Furthermore, it is easy to integrate with an oxygenator, and by integrating it, the circuit structure becomes simple, and it has the advantage that it becomes easy to set up the circuit and remove bubbles during priming.

Therefore, an artificial lung having an integrated blood storage tank has been proposed (Japanese Patent Application Laid-open No. 57661/1983).

Some open type blood storage tanks are equipped with a drug solution inlet, but when the drug solution is injected from this drug solution inlet, it drops directly into the stored blood or incoming blood. Bubbles were sometimes generated at the dripping area. It is also possible to provide a defoaming member behind the chemical injection port, but it has been difficult to defoam the bubbles generated at the above-mentioned dripping portion using the defoaming member.

[Problems to be Solved by the Invention] The present invention solves the above-mentioned problems of the prior art, and solves the problem that the medicinal solution flowing in from the medicinal solution inlet is stored or drips into the inflowing blood, causing the generation of air bubbles. The aim is to provide a blood storage tank without

[Means for Solving the Problems] What achieves the above object is a blood storage tank formed of a hard member, which includes a blood inlet, a blood storage part communicating with the blood inlet, and a blood storage part of the blood storage part. a blood outlet provided at the bottom; a drug solution inlet provided above the blood storage tank; and a blood discharge port provided above the blood storage tank;
A liquid medicine inflow part that is interposed between the liquid medicine injection port and the blood storage part and includes a liquid medicine guide path that guides the liquid medicine injected from the liquid medicine injection port to the inner wall of the blood storage tank, and the liquid medicine in the liquid medicine inflow part. The blood reservoir has a medicinal solution flow path formed so that the medicinal solution guided by the guide path flows down the inside of the blood reservoir along the inner wall of the blood reservoir without dripping.

Moreover, it is preferable that the blood reservoir is formed by a housing and a lid attached to an upper part of the housing. Furthermore, the chemical liquid flow path is
It is preferable that the drug solution guide path of the drug solution inflow portion and the inner wall of the blood reservoir be formed. Furthermore, the chemical liquid inflow portion is formed by an inner surface of the housing, an inner surface of the lid, and a chemical liquid guiding path forming member attached to the lid, and further, the chemical liquid flow path is formed at an end of the chemical liquid guiding path forming member. Preferably, it is formed between the inner surface of the housing and the inner surface of the housing. moreover,
The chemical liquid introduction part is located below the chemical liquid inlet,
and a space partially defined by the housing and the inner wall of the lid attached to the upper part of the housing, and the chemical liquid guide path is formed by the inner wall surface of the housing that forms the inclined bottom part of the chemical liquid introduction part. Further, it is preferable that the liquid medicine flow path is formed by a hole that communicates the liquid medicine introduction part provided at the lowest part of the liquid medicine introduction part and the blood storage part. Furthermore, the chemical solution introduction section is located below the chemical solution inlet, and includes a housing, an inner wall of a lid body attached to the upper part of the housing, and a drug solution introduction section forming part that protrudes upward from the inner wall of the housing. The chemical solution guide path is formed by an inner wall surface of the housing that forms the inclined bottom part of the chemical solution introduction section, and the drug solution flow path is formed by a partitioned space, and the drug solution guide path is formed by the inner wall surface of the housing that forms the inclined bottom part of the drug solution introduction section. Preferably, it is formed by a downwardly extending slit provided in the section. Furthermore, it is preferable that the chemical liquid guiding path is inclined downward. Furthermore, the blood introduction port is
It is preferable that the opening be vertically upward. Furthermore, it is preferable that the blood inlet port is provided near a vertically lower part of the drug solution flow path. Furthermore, the blood storage tank has a blood inflow part located between the blood inlet and the blood storage part, and the blood inflow part is provided with an antifoaming member that crosses the blood flow path of the blood inflow part. is preferred.

The blood reservoir of the present invention will be explained in detail using embodiments shown in the drawings.

The blood storage tank 1 of the present invention is formed of a hard member, and includes a blood inlet 2, a blood storage part 10 communicating with the blood inlet 2, a blood outlet 3 provided at the lower part of the blood storage part 10, and a blood storage part 10 that communicates with the blood inlet 2. A drug solution inlet 5 provided above the tank 1 and a drug solution injected through the drug solution inlet 5 provided above the blood storage tank 1 and interposed between the drug solution inlet 5 and the blood storage part 10 are transferred to the blood storage tank. A liquid medicine inflow section 4 is provided with a liquid medicine guide path that guides the liquid medicine to the inner wall of the blood storage tank 1. Chemical liquid channel 7 formed to flow downward
It has

EMBODIMENT OF THE INVENTION Hereinafter, the blood storage tank of this invention will be explained in detail using the Example shown in FIG. 1 and FIG.

FIG. 1 is a longitudinal cross-sectional view showing an embodiment of the blood storage tank of the present invention, and FIG. 2 is an enlarged cross-sectional view of the portion taken along the line - - showing the blood inlet portion of the embodiment shown in FIG.

The blood storage tank 1 of this embodiment includes a housing 9 that forms a blood inlet 2, a blood storage section 10, and a blood outlet 3.
, a lid body 8 attached above the housing 9 and provided with a chemical liquid inlet 5 above, and a chemical liquid guide attached to the inner surface of the lid body 8 to form a chemical liquid inflow section 4 having a chemical liquid guide path. and a path forming member 6.

Examples of the hard member constituting this blood reservoir 1 include hard vinyl chloride resin, styrene resin, and carbonate resin. Further, it is preferable that the housing 9 portion be transparent so that the stored blood can be easily confirmed.

The lid body 8 is provided with a drug solution inlet 5 that communicates with the inside of the blood reservoir 1, and a plurality of drug solution inlets may be provided.

The blood inlet 2 of the blood reservoir 1 communicates with the blood outlet of the oxygenator, as will be described later, and is preferably opened vertically upward. Further, it is preferable that the blood storage tank 1 is provided with a blood inflow part 12 that communicates with the blood introduction port 2. It forms a blood flow path, and is located at a higher position than the blood storage section 10 and has a bottom surface with almost no height difference from the blood introduction port 2. The shape of the bottom surface may be flat, semi-cylindrical, etc., but a flat shape is preferable because it facilitates the installation of the defoaming member 11, which will be described later.

It is preferable that the defoaming member 11 is provided in the blood inflow section 12 so as to cross the blood flow path. The defoaming member 11 defoams when blood containing air bubbles flows and transfers the blood without air bubbles to the blood storage section 1.
This is for sending to 0. Foam is generally used as the defoaming member 11, and its hydrophobicity is used to grow and remove air bubbles.
A foam is a three-dimensional cubic body with a mesh shape.
The defoaming member 11 is placed in close contact with the bottom and side surfaces of the blood inflow portion 12 of the blood storage tank 1 so that all of the flowing blood comes into contact with it (so that no blood flow path that does not come in contact with the defoaming member is formed). It is preferable to arrange. Although the upper end of the defoaming member 11 does not necessarily need to be in close contact with the lid 8 of the blood storage tank 1, it is necessary to prevent the defoaming member 11 from moving and to prevent blood from flowing out from the upper end of the defoaming member 11. are preferably in close contact. Further, in order to prevent the defoaming member 11 from moving, it is preferable to provide a locking portion 13 on the inner surface of the housing. The locking portions 13 are ribs formed on the inner surface of the housing 9, and a total of four locking portions 13 are provided, and the ends of the defoaming member 11 are held between the locking portions 13. The shape of the rib forming the locking portion 13 is preferably a continuous linear shape.

Further, it is preferable that the defoaming member 11 is made of two foams, a foam 11a having a large mesh number and a foam 11b having a small mesh number, which are brought into close contact with each other. It is preferable to arrange the foams 11a with a large number of meshes on the blood introduction port 2 side and the foams 11b with a small number of meshes on the blood storage part 10 side. By using two foams with different numbers of meshes and arranging them side by side in such a way that the number of meshes is small in the blood flow direction, it has sufficient defoaming ability without increasing pressure loss. It is.

Alternatively, a three-layer structure may be used in which two types of foam are used and a foam having a mesh number intermediate between the two is inserted between them.

As the foam used for the defoaming member 11, urethane foam, cellulose foam, nylon foam, etc. can be used. Preferably,
It is urethane foam. Furthermore, the defoaming member 11
It is preferable to coat the foam with an antifoaming agent. As the antifoaming agent, oils can generally be used, and silicone oil can be particularly preferably used.

As shown in FIG. 1, a drug solution inlet 5 is provided above the blood inlet 2 of the blood reservoir 1. The chemical liquid inlet 5 is formed in the lid body 8 . Furthermore, a chemical liquid introduction part forming member 6 is provided at the lower part of the chemical liquid inlet 5, and this forming member 6 is fixed to the inner surface of the lid body 8.
It is suspended from the inner surface of the. A medical solution introduction section 4, which is a space surrounded by the medical solution introduction section forming member 6, the inner surface of the lid body 8, and the inner surface of the housing 9, is formed inside and above the blood reservoir 1. This medical solution introduction section 4 and the inside of the blood storage tank 1 below it communicate with each other through a medical solution flow path 7 formed between the tip of the medical solution introduction section forming member 6 and the inner surface of the housing 9 .

Further, as shown in FIG. 2, the side portions of the chemical solution introduction portion forming member 6 are in contact with the inner side wall of the housing 9, and the tip of the forming member 6 is not flat but has a convex portion and a concave portion. The tip of the convex portion is in contact with the inner surface of the housing 9. and,
A chemical liquid flow path 7 is formed by the portions that are not in contact with each other. The distance of this chemical fluid channel 7 (distance between the inner surface of the housing 9 and the forming member 6) is 0.2 to 20 mm, preferably 0.2 to 1 mm.

By providing such a chemical solution introduction part 4,
The medicinal solution such as a vasodilator that has flowed in from the medicinal solution inlet 5 comes into contact with the medicinal solution introduction part forming member 6 without directly dripping below the blood reservoir 1, and a part of it is stored in the medicinal solution introduction part 4, and the medicinal solution flows out sequentially from the chemical liquid channel 7, which is a narrow channel. The medicinal solution flowing out from the medicinal solution channel 7 is configured to flow along the inner surface of the housing 9 into the space below the blood storage tank 1.

The amount of drug solution injected at one time varies depending on the patient's condition, physique, etc., but is approximately 2 to 30 c.c., and the drug solution introduction part 4 is large enough to accommodate the amount of drug solution injected at one time. It is preferable to have the following. Furthermore, if the volume of the drug solution introduction part is smaller than the injection volume, the injection may be performed in multiple doses or the injection time may be increased to adjust the volume.

As shown in FIG. 1, in the chemical liquid introduction part forming member 6, the chemical liquid guide path (bottom part of the chemical liquid introduction part) formed by the flat part with which the chemical liquid flowing out from the chemical liquid inlet 5 comes into contact forms an inclined surface. It is preferable that it is formed. This is because such an inclination prevents the medicinal solution that has flowed into the medicinal solution introducing portion 4 from being stored in this space and not flowing out, and also makes it possible to form a gentle flow of the medicinal solution.
The angle of inclination of this inclined surface is 1° to 60°, preferably
The angle is between 10° and 30°.

In FIG. 2, the portion where the chemical liquid inlet 5 is located is shown by a broken line, and in this embodiment, three chemical liquid inlets are provided. The drug solution inlet 5 can be used not only for injecting a drug solution but also as a communication port for communicating the inside and outside of the blood reservoir 1.

Further, the locations where the blood introduction ports 2 are located are shown by dotted broken lines, and in this embodiment, two blood introduction ports 2 are provided.

Further, although the embodiment has been described in which a part of the tip of the chemical liquid introduction part forming member 6 contacts the inner surface of the housing 9, the present invention is not limited to this. A liquid drug flow path may be formed throughout the tip. In this case, the distance of the chemical fluid flow path 7 (the distance between the inner surface of the housing 9 and the forming member 6) is 0.2 to 20 mm, preferably 0.2 to 1 mm.

Further, the number of blood introduction ports 2 may be one, or may be two or more. The drug solution inlet, the drug solution introduction part, and the drug solution flow path may be provided at any position above the housing 1, for example, above the blood storage section 10, but preferably as shown in FIG. , above the blood inlet 2. Since blood sequentially flows into the housing 9 from the blood inlet 2, by allowing the medical fluid to flow into that portion, the medical fluid is stirred by the blood, and it is possible to prevent the formation of a portion where the concentration of the medical fluid is high. In particular, when the antifoaming member 11 is provided in the blood introduction part 12 following the blood introduction port 2 as in this embodiment, the inflow resistance of the antifoaming member 11 causes the antifoaming member and the blood introduction port to Blood often exists in the area between the two, and the blood exists in a flowing state in that area, so by flowing the medicinal liquid into that area, it is possible to disperse the medicinal liquid into the blood fairly uniformly. This is preferable.

Further, the shapes of the chemical solution introduction part 4 and the chemical solution introduction part forming member 6 may be such that they surround the lower part of the drug solution inlet 5 as shown in FIG.
Moreover, as shown in FIG.
The partitioned space forms a liquid medicine introduction part 4, and the bottom surface of the liquid medicine introduction part 4 forms a medicine liquid guiding path. As shown in FIG. 4, the bottom surface (chemical guide path) of the chemical solution introduction part 4 is formed to be inclined downward, and the chemical solution introduction part 4 and the inside of the housing 9 are shown in FIG. As shown in FIG. 2, communication is established through the drug solution flow path 7 formed by the hole provided at the lowest part of the drug solution introduction part 4, and the drug solution flowing out from the drug solution flow path 7 travels along the inner surface of the housing 9 to the blood storage tank 1. It may be configured to flow into the downward space.

Next, an embodiment of the blood reservoir of the present invention shown in FIGS. 5 and 6 will be described.

FIG. 5 is a cross-sectional view of the drug solution inlet portion of the embodiment of the blood reservoir of the present invention, and FIG. 6 is a cross-sectional view taken along the line AA of the blood reservoir of FIG. 5.

In the blood reservoir 1 of this embodiment, the drug solution introduction section 4 is formed by a space partially partitioned by the inner wall of the housing 9 without using a drug solution introduction section forming member, and the inner wall of the housing forming the drug solution introduction section 4 It is the same as that shown in FIG. 4 in that the bottom surface forms a chemical liquid guiding path.

This blood storage tank 1 is provided with a drug solution introduction portion forming portion 9a facing the inner wall of the housing 9 above the inner wall of the housing 9. A chemical solution introduction section 4 is formed by the inner surface. In other words, as shown in FIGS. 5 and 6, the chemical solution introduction part 4 is provided with a flat chemical solution introduction part forming part 9a that is provided in the housing 9 and projects upward from the inner wall of the housing 9. , is defined by the inner wall of the housing on the side of the chemical liquid inlet 5 from the chemical liquid introduction part forming part 9a. Then, the chemical solution inlet 5
is in communication with the chemical solution introduction section 4. A plurality of slits extending in the vertical direction are provided in the chemical liquid introduction part forming part 9a, and the chemical liquid introduction part 4 and the inside of the housing 1 communicate with each other through the slits. is forming. The width of the slit is 0.2 to 20 mm, preferably 0.2 to 1
mm. It is preferable that a groove 45 is provided below the position where the chemical liquid flow path 7 is provided so as to be continuous with the chemical liquid flow path, and the chemical liquid flowing out from the chemical liquid flow path 7 flows through this groove. , it is possible to ensure that the information is transmitted along the inner wall of the housing 9. Further, the groove 45 may extend to the lower end of the housing 9. Moreover, it is preferable that the chemical liquid guiding path 4a formed by the bottom surface of the chemical liquid introduction part 4 formed by the housing 9 is an inclined surface. The angle of inclination of this slope is 1°~
60°, preferably 10° to 30°.

The blood reservoir of the present invention having such a configuration is provided in the extracorporeal circulation circuit of an artificial lung, and for example,
As shown in FIG. 7, the oxygenator is preferably used as an oxygenator which is integrated with an oxygenator and a heat exchanger.

In the embodiment shown in FIG. 7, the oxygenator 30 is
Consisting of a cylindrical housing body 31 and mounting covers 32a and 32b that close both open ends of the housing body 31, an assembly of hollow fiber membranes 14 is housed in the housing body 31 in the axial direction. Both ends of the membrane 14 are fluid-tightly fixed to both ends of the housing body 31 by partition walls 15a, 15b so that the respective openings are not blocked. Further, one mounting cover 32a has a gas inflow port 17 that communicates with a gas inflow space 16 that communicates with the internal space of the hollow fiber membrane 14 formed by the mounting cover 32a, the housing body 31, and the partition wall 15a.
is provided, and the other mounting cover 32b
The hollow fiber membrane 14 formed by the mounting cover 32b, the housing body 31, and the partition wall 15b is shown in FIG.
A gas outflow port 19 is provided that communicates with a gas outflow space 18 that communicates with the interior space of the gas outflow space 18 . Further, the housing body 31 is provided with a blood inlet 21 and a blood outlet 22 that communicate with the blood chamber 20 formed by the inner wall, the partition walls 15a and 15b, and the outer wall of the hollow fiber membrane 14.

It is not necessary to provide the mounting cover 32b on the gas outflow port side, and the lower partition wall may be left open. Furthermore, the artificial lung is not limited to the above-mentioned type that allows blood to flow outside the hollow fiber membrane, but may also be of a type that allows blood to flow inside a normal hollow fiber membrane, or may be of a flat membrane type. Preferably, the oxygenator is of the type that allows blood to flow outside the hollow fiber membrane described above, and if this oxygenator is used, there is no need to provide a blood pump in front of the oxygenator in the circulation circuit because the pressure loss is small. Blood can be sent to the oxygenator and further to the blood reservoir by removing blood only by the drop from the human body.

The blood inlet 2 of the blood reservoir 1 having the above-described configuration is fluid-tightly connected to the blood outlet 22 of the artificial lung 30. The liquid-tight connection between the blood outflow port 22 of the oxygenator 30 and the blood inlet port 2 of the blood storage tank 1 can be achieved by, for example, screw fitting, tapered fitting,
This is accomplished by liquid-tight fitting such as fitting through an O-ring, by ultrasonic or high-frequency bonding, by bonding using an adhesive, or the like.

On the other hand, a heat exchanger 40 is attached to the blood inlet 21 of the artificial lung 30. The heat exchanger 40 includes a large number of heat exchange tube bodies 25 inside the casing 24.
are arranged in parallel and spaced apart from each other along the longitudinal direction of the casing 24, and both ends of the heat exchange tubes 25 are connected to the casing 24 by partition walls (not shown) with their respective openings not being closed. is fixed liquid-tight to the side wall of the A blood inlet port 27 is provided on the side wall of the casing 24 and communicates with a space 26 formed by the partition wall, the inner wall of the casing 24, and the outer wall of the heat exchange tube 25. The blood inlet 21 of the artificial lung 30 is in communication. On the other hand, in the internal space of the heat exchange tube 25 that is liquid-tightly partitioned from this space 26, there is a heat exchange medium inflow port 28 provided on the outside of one partition wall of the casing 24, and a heat exchange medium inflow port 28 provided on the outside of one partition wall of the casing 24, and A heat exchange medium outflow port 29 provided in is in communication. Therefore, this heat exchanger 40
Then, blood flows into the heat exchanger 40 from the blood inlet port 27 and flows outside the heat exchange tube 25, and at this time, a heat exchange medium (for example, hot water or cold water) is introduced into the heat exchange tube 25. flows through the bloodstream, warming and cooling the blood. In addition, as a heat exchanger, blood is passed inside the heat exchange tube,
A type of heat exchanger in which a heat exchange medium flows outside the heat exchange tube may also be used.

In this artificial lung device, the heat exchanger 40
The blood reservoir 1 is provided with temperature measurement probe insertion ports 29 and 41, respectively.

[Function] The function of the blood storage tank of the present invention will be explained using the oxygenator and the oxygenator integrated with the heat exchanger shown in FIG. 7.

The artificial lung device is installed in an extracorporeal circulation circuit, and blood flowing in from the blood inlet port 27 of the heat exchanger 40 is heated or cooled while reaching the blood inlet 21 of the artificial lung 30. The blood flowing in from the blood inlet 21 of the artificial lung 30 enters the blood chamber 20 formed between the housing body 31 and the hollow fiber membrane 14.
While passing through the hollow fiber membrane 14, which is a gas exchange membrane, the blood comes into contact with the oxygen-containing gas flowing in the internal space of the hollow fiber membrane 14, and carbon dioxide in the blood is removed and oxygen is added thereto. Then, the oxygenated blood flows out from the blood outlet 22 of the artificial lung 30 and passes through the blood inlet 2 of the blood storage tank 1 to the blood inlet 1.
It flows to 2. Then, if necessary, a medicinal solution such as a vasodilator is injected from a medicinal solution inlet 5 provided in the blood reservoir 1. The injected drug solution is transferred to the drug solution introduction section 4
, comes into contact with the chemical liquid guide path forming member 6, and flows out through the chemical liquid flow path 7, which is a narrow flow path. and,
The medical fluid flowing out from the medical fluid channel 7 flows along the inner surface of the housing 9 into the space below the blood reservoir 1 . Therefore, the injected medical solution does not drip directly below the blood reservoir 1, so it is possible to prevent the generation of air bubbles due to the injection of the medical solution. Then, the blood passes through the defoaming member 11 provided in the blood introduction part 12, and at this time, the air bubbles contained in the blood contact the cells of the foam of the defoaming member 11 and grow into a blood storage tank. moves upwards and is removed. Then, the defoamed blood flows into the blood storage section 10 of the blood storage tank 1 and is stored therein, after which it is discharged from the blood outlet 3 and sent.

[Effects of the Invention] The blood storage tank of the present invention is a blood storage tank formed of a hard member, and includes a blood inlet, a blood storage part communicating with the blood inlet, and a blood storage part provided at a lower part of the blood storage part. a discharge port, a liquid medicine inlet provided above the blood storage tank, and a liquid medicine inlet provided above the blood storage tank, interposed between the liquid medicine injection port and the blood storage section, and injected from the liquid medicine injection port. A medical solution inflow section including a medical solution guide path for guiding the medical solution to the inner wall of the blood reservoir, and a medical solution guided by the drug solution guide path of the drug solution inflow section to flow along the inner wall of the blood reservoir without dripping. Since the drug solution flow path is formed to flow downward into the interior of the drug solution inlet, the drug solution such as a vasodilator injected from the drug solution inlet flows into the drug solution introduction part and flows out from the drug solution flow path. Since it flows along the inner surface of the blood storage tank into the space below the blood storage tank, the injected drug solution does not drip directly onto the blood that is stored or flowing into the blood storage tank, and air bubbles do not form at the dripping area. This can be prevented from occurring.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view showing an embodiment of the blood storage tank of the present invention, FIG. 2 is an enlarged cross-sectional view of a portion taken along the line --, showing the drug solution inlet portion of the embodiment shown in FIG. 1, and FIG. , FIG. 4 is a sectional view showing the drug solution inlet portion of another embodiment of the blood reservoir of the present invention, and FIG. 5 is a sectional view showing the drug solution inlet portion of another embodiment of the blood reservoir of the present invention. , FIG. 6 is a sectional view showing the drug solution inlet portion of another embodiment of the blood storage tank of the present invention, FIG. 6 is a sectional view taken along the line A-A showing the drug solution inlet portion of the embodiment shown in FIG. 1 is a partial cross-sectional view showing an artificial lung device incorporating an embodiment of the blood reservoir of the present invention. DESCRIPTION OF SYMBOLS 1...Blood storage tank, 2...Blood inlet, 3...Blood outlet, 4...Medical solution inlet, 4a...Medical solution guiding path, 5...Medical solution inlet, 7...Medical solution flow path, 6... …
Chemical liquid guide path forming member, 8... Lid, 9... Housing, 10... Blood storage part, 11... Defoaming member, 13
...locking part, 30 ... oxygenator, 40 ... heat exchanger.

Claims (1)

[Scope of Claims] 1. A blood reservoir formed of a hard member,
a blood inlet, a blood storage part communicating with the blood inlet, and a blood outlet provided at a lower part of the blood storage part;
A drug solution inlet provided above the blood storage tank; and a drug solution injected from the drug solution inlet provided above the blood reservoir and interposed between the drug solution inlet and the blood storage portion to the blood storage tank. A liquid medicine inflow part equipped with a liquid medicine guide path guided to the inner wall of the blood storage tank, and a liquid medicine guided by the liquid medicine guide path of the liquid medicine inflow part passes along the inner wall of the blood storage tank without dripping and flows downward inside the blood storage tank. A blood storage tank characterized by having a liquid medicine flow path formed so as to flow therein. 2. The blood reservoir according to claim 1, wherein the blood reservoir is formed by a housing and a lid attached to an upper part of the housing. 3. The blood reservoir according to claim 1 or 2, wherein the medical fluid flow path is formed between the medical fluid guiding path of the medical fluid inflow portion and the inner wall of the blood reservoir. 4. The chemical liquid inflow portion is formed by the inner surface of the housing, the inner surface of the lid, and a chemical liquid guide path forming member attached to the lid, and the chemical liquid flow path is formed by the chemical liquid guide path forming member. The blood reservoir according to claim 2, which is formed between the end of the housing and the inner surface of the housing. 5. The chemical liquid inlet is located below the chemical liquid inlet and is formed by a space partially partitioned by the housing and an inner wall of a lid attached to the upper part of the housing, and the chemical liquid guide path. is formed by an inner wall surface of the housing that forms the inclined bottom part of the chemical solution introduction section, and further, the chemical solution flow path is formed by the chemical solution introduction section provided at the lowest part of the chemical solution introduction section. The blood reservoir according to claim 2, which is formed by a hole that communicates with the blood reservoir. 6. The chemical solution introduction part is located below the chemical solution inlet, and forms a chemical solution introduction part that protrudes upward from the housing, the inner wall of the lid attached to the upper part of the housing, and the inner wall of the housing. The chemical liquid guide path is formed by an inner wall surface of the housing that forms the inclined bottom part of the chemical liquid introduction part, and the chemical liquid flow path is formed by a space partitioned by the chemical liquid introduction part. The blood reservoir according to claim 2, wherein the blood reservoir is formed of a downwardly extending slit provided in the drug solution introduction part forming part. 7. The blood reservoir according to any one of claims 1 to 6, wherein the medical fluid guide path is inclined downward. 8. The blood reservoir according to any one of claims 1 to 7, wherein the blood introduction port opens vertically upward. 9. The blood reservoir according to any one of claims 1 to 8, wherein the blood introduction port is provided near a vertically lower portion of the drug solution flow path. 10 The blood storage tank has a blood inflow part located between the blood introduction port and the blood storage part, and the blood inflow part is provided with an antifoaming member that crosses the blood flow path of the blood inflow part. A blood reservoir according to any one of claims 1 to 9.