JPH05345019A - Blood storage vessel integrated with blood processor - Google Patents

Abstract

PURPOSE:To satisfy the securing of visual recognizability of a blood storage and simultaneously higher piping efficiency of a blood processor. CONSTITUTION:A blood processor is joined on the rear side of a jutting part 201 provided on the bottom surface of a blood storage 1 and joint parts 3 and 5 are provided on the bottom surface of the blood storage 1 and at the top of the blood processor, respectively. The joint parts 3 and 5 are put together free to turn. Thus, the blood processor can be set in an arbitrary direction regardless of the setting direction of the blood storage 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blood reservoir to which a blood processing device is integrally connected.

[0002]

2. Description of the Related Art For example, in cardiac surgery, an artificial lung is operated in which a blood pump is operated to remove blood from a patient's vein, gas is exchanged by an artificial lung, and then the blood is returned to the patient's artery. Extracorporeal blood circulation is performed. In addition, a line for returning blood after suctioning blood from the operative field, filtering and removing foreign substances is also provided. In such an artificial lung extracorporeal blood circulation circuit, a blood reservoir for temporarily storing the removed blood,
A blood storage tank (cardiotomy reservoir) for filtering blood drawn from the operative field and temporarily storing it is installed.

Such a blood reservoir has a buffering function for adjusting the blood volume in the circuit and keeping the blood return volume constant. However, as described above, in the extracorporeal blood circulation circuit, It is used together with the blood processing device.

On the other hand, in order to secure a space for arranging various devices in the operating room, it is preferable that the space for arranging each medical device is small. Further, it is desired to reduce the distance between the devices so that the priming volume in the extracorporeal blood circulation circuit does not increase especially due to the drawing of a blood tube or a circuit tube connecting the devices. In order to meet such demands, conventionally, a blood reservoir in which a processing device such as an artificial lung is integrally connected under the bottom is used.

By the way, if the blood storage volume of the blood storage tank is too small, bubbles or other troubles may occur, so it is necessary to constantly monitor the blood storage volume. However, a cylindrical blood storage tank whose cross-sectional area does not change is It is difficult to confirm changes in quantity. Therefore, there has been proposed a blood reservoir having a structure in which a portion of the bottom surface provided with a blood outlet is projected downward to provide a protrusion having a reduced cross-sectional area on the front side of the blood reservoir.

[0006] In such a blood storage tank, the artificial lung and the like provided below the bottom surface of the blood storage tank are arranged on the back side of the projecting portion to reduce the arrangement space and the priming amount.

On the other hand, a blood processing apparatus provided under the blood reservoir is connected with a tube for communicating with other circuit components such as a blood pump, but in order to reduce the total priming amount, It is required to efficiently connect this tube. In order to meet such requirements, for example, the installation direction of the blood processing apparatus is determined so that the tube connection port of the blood processing apparatus faces other devices such as a blood pump, and each element to be connected is determined. The distance between them should be close.

However, when the extracorporeal blood circulation circuit is used during surgery, it is necessary to arrange the protruding portion toward the operator so that the operator who operates the circuit can visually recognize the blood storage amount in the blood reservoir. is there.

As described above, in a blood reservoir with an integrated blood treatment device, it is not possible to install the blood treatment device in the direction in which tube piping is most efficient, and at the same time, to install the blood treatment device in a direction that is easily visible to the operator. .. For this reason, in order to ensure the safety of circuit operation, the visibility of the blood storage tank must be prioritized, so that the piping efficiency of the tube is sacrificed.

[0010]

SUMMARY OF THE INVENTION An object of the present invention is to provide a blood processing apparatus-integrated blood tank capable of setting both the direction of the blood processing apparatus and the installation direction of the blood processing apparatus in the necessary directions. is there.

[0011]

This object is achieved by the present invention (1), and it is more preferable that the objects (2) to (5) are satisfied.

(1) A blood reservoir having a projecting portion whose bottom part is eccentric and which projects downward, and a side of the blood reservoir where the projecting portion is provided is a front side, and a rear side of the projecting portion. A blood processing device integrated blood reservoir having a blood processing device joined to the bottom side of the bottom, the bottom surface of the blood reservoir and the upper part of the blood processing device are mutually joined,
A blood reservoir integrated with a blood processing device, each of which has a joint part that is joined to each other to relatively rotate the blood processing device and the blood reservoir.

(2) The blood processing apparatus integrated blood reservoir according to (1), wherein the blood processing apparatus has a heat exchanger and an artificial lung.

(3) Of the joints, one of the joints is a fitting portion having a circular cross-sectional contour, and the other joint has a circular cross-sectional contour. The above-mentioned (1) in which the fitting portion is a fitting portion into which the fitting portion is rotatably fitted.
Alternatively, the blood storage device integrated blood reservoir according to (2).

(4) The joint portion is provided with a lock means for preventing the blood treatment device and the blood reservoir from rotating while at the same time preventing the joint portion from separating. The blood storage device integrated blood reservoir according to any one of (3).

(5) The relative rotation angle between the blood reservoir and the blood processing apparatus is 90 ° or more (1) to (1)
The blood storage device integrated blood reservoir according to any one of (4).

[0017]

In the lower side of the blood storage tank, the blood processing device is joined to the lower side of the bottom surface on the back side of the protruding portion. The protruding portion of the blood reservoir is directed toward the operator because it is necessary for the operator to visually confirm the blood surface.

It is necessary to connect a tube or the like for connecting to the circulation circuit of another device to the blood processing apparatus, and the installation direction of the blood processing apparatus is determined in consideration of the piping efficiency of the tube or the like.

Here, since the blood processing apparatus is rotatably joined to the blood reservoir, the blood processing apparatus is oriented in the determined desired direction with the protruding portion of the blood reservoir facing the operator. It becomes possible to install it.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The blood reservoir of the present invention will be described below in detail with reference to the preferred embodiments shown in the accompanying drawings.

FIG. 1 is a side view showing a constitutional example of a blood reservoir of the present invention, FIG. 2 is an overall front view of the blood reservoir, and FIG. 3 is an overall rear view of the blood reservoir. As shown in these figures, the blood reservoir 1 of the present invention has a housing 2 that is composed of a housing body 20 and a lid 22. A blood storage space 21 for storing blood is formed inside the housing 2.

The housing main body 20 has a box shape having a protruding portion 201 protruding downward on the left side in FIG. 1, and a tubular blood outlet 23 communicating with the blood storage space 21 is provided at a lower portion of the protruding portion 201. Are formed. A connection tube (not shown) is connected to the blood outlet 23 and communicates with a blood inlet 421 of the heat exchanger 4 described later. A blood sending pump is installed in the connecting tube, and blood is sent from the blood reservoir 1 to the heat exchanger 4 by the blood sending pump.

The lid 22 is fitted to the upper end of the housing body 20 so as to cover the upper opening of the housing body 20. Further, two tubular blood inlets 221 a and 221 b, which communicate with the blood storage space 21, are formed at predetermined positions of the lid body 22. Of these, the blood inlet 221a is connected to, for example, a blood removal line tube of the extracorporeal blood circulation circuit, and the blood inlet 221b is connected to, for example, a blood suction line tube from the surgical field.

A priming liquid injection port 221c used when injecting a priming liquid into the defoaming device 24a, which will be described later, is formed on the side of the blood inflow port 221a.

A degassing port 221d is formed on the side of the blood inlet 221a opposite to the priming liquid inlet 221c. A part of the bubbles broken by the defoaming device 24a is discharged to the outside as air from the degassing port 221d.

The air is taken in and out with the increase and decrease of blood in the blood storage tank 1 through the deaeration port 221d.

Also, on both sides of the blood inlet 221b,
A plurality of intracardiac blood flow inlets 221e for suctioning intracardiac blood are formed.

The volume of the blood storage space 21 is not particularly limited, but for example, it is preferably about 3000 to 5000 ml for adults and about 1000 to 2500 ml for children.

The constituent materials of the housing body 20 and the lid 22 are, for example, polycarbonate, acrylic resin, polyethylene terephthalate, polyethylene, polypropylene, polystyrene, polyvinyl chloride, acrylic-styrene copolymer, acrylic-butadiene-styrene copolymer. Examples thereof include coalescing, and among these, polycarbonate, acrylic resin, polystyrene, and polyvinyl chloride are particularly preferable.

Further, the housing body 20 and the lid 22
Is preferably substantially transparent so that the amount of stored blood and the state of blood inside can be visually confirmed.

It is preferable that a scale indicating the amount of stored blood is provided on the front surface (the end surface on the left side in FIG. 1) or side surface of the housing body 20 (the illustrated blood reservoir is for 4000 ml).

In such a blood storage tank 1, two defoaming devices 24a and 24b for removing air bubbles contained in blood flowing into the blood storage space 21 are installed. Hereinafter, these defoaming devices have, for example, a filter member that constitutes a bag body, and a defoaming member that is arranged in the upper portion of the bag body. The filter member has a function of removing foreign matters and bubbles in blood, and can also carry an antifoaming agent as needed. The material of the filter member is composed of a porous material having sufficient blood permeability, such as a mesh (net) woven cloth or a nonwoven cloth. The blood that has flowed into the defoaming device 24 has its bubbles removed by passing through the filter member and flows into the blood storage space 21. The defoaming member has a function of erasing the bubbles by breaking the bubbles by contacting the bubbles in the defoaming device. For example, by supporting the defoaming agent on a foam such as polyurethane foam. It is configured.

The defoaming agent has a function of breaking bubbles when air bubbles come into contact therewith, and typical examples thereof include silicone (compound type containing silica, oil type, etc.) and the like. The defoaming device 24a has a blood inlet 2
21a communicates with each other, and the defoaming device 24b has a blood inlet 221.
b communicates.

On the bottom surface 25 of the housing body 20 of the blood reservoir 1 constructed as described above, as shown in FIG. 4, the joint portion 3 is provided downward. The joint portion 3 has two concentrically formed cylindrical bodies 30a and 30b having different diameters.
An annular fitting portion 31 is formed. Three holes 314 are formed in the outer cylindrical body 30a. The hole 314 is formed by boring toward the center of the cylindrical body 30a, and the distance between the three holes 314 is set such that the angle formed by the center lines of the holes extending toward the center is 90 °. ing. A restricting body 81 of the lock member 8 described later is inserted into the hole 314.

When the blood reservoir 1 is viewed from the front, the joint 3 is located on the back side of the protrusion 201. And
By joining the joining portion 5 of the blood treating apparatus, which will be described later, to the joining portion 3, the blood treating apparatus can be arranged in the space on the back side of the protruding portion 201, and the effective use of the treatment space such as the operating room can be achieved. it can.

In this embodiment, the blood processing apparatus is composed of the heat exchanger 4 and the artificial lung 6. The heat exchanger 4 and the artificial lung 6 are both substantially cylindrical in shape, and the heat exchanger 4 is placed on the artificial lung 6, and the blood reservoir 1 is mounted on the heat exchanger 4. It is joined.

The heat exchanger 4 is a cylindrical housing 4
0 has a heat exchange section 41, and a blood inflow section 42 and a blood outflow section 43 are provided on both sides of the heat exchange section 41. A metal tube is arranged in the heat exchange section 41. In addition, the blood inflow portion 42 and the blood outflow portion 43,
A blood inlet 421 and a blood outlet 431 are provided respectively. The connection tube is connected to the blood inlet 431 as described above.

A heat medium supply pipe 44 and a heat medium discharge pipe 45 for supplying and discharging a heat medium such as water adjusted to a predetermined temperature are connected to the heat exchange section 41. The pipes 44 and 45 are arranged on the opposite sides of the heat exchange section 41 in order to improve heat exchange efficiency.
The ends of the heat medium supply pipe 44 and the heat medium discharge pipe 45 serve as a heat medium supply port 441 and a heat medium discharge port 451, respectively. Further, the heat medium supply pipe 44 and the heat medium discharge pipe 45 are configured to rotate clockwise or counterclockwise around the connection base end portion with the heat exchange portion 41 in FIG. 1. Further, the blood inflow section 42
Is provided with a blood inlet 421, and the blood outlet 43 is provided with a blood outlet 431. The heat carrier is
It flows from the supply port 441 through the heat medium supply pipe 44 into the heat exchange section 41, exchanges heat with blood by the metal tube, and is discharged through the heat medium discharge pipe 45 and the discharge port 451.
On the other hand, blood flows into the blood inflow part 42 from the blood inflow port 421, passes through the heat exchange part 41, flows into the blood outflow part 43, and flows out from the blood outflow port 431. At this time, the blood exchanges heat with the heat medium when passing through the heat exchange section 41. In this way, the temperature of blood is adjusted.

At the bottom of the housing 40 of the heat exchanger 4,
A recess is formed and a fitting portion 401 is provided. A gas supply unit 61 located above the artificial lung 6 to be described later is fitted into the fitting unit 401, and the heat exchanger 4 and the artificial lung 6 are fitted.
Becomes an integral part. Here, the heat exchanger 4 and the artificial lung 6 may be fixed to each other or may be joined so as to be relatively rotatable. When it is rotatable, the orientation of each connection port such as the blood outlet port 64 can be arbitrarily set regardless of the installation positions of the blood reservoir 1 and the heat exchanger 4.

The artificial lung 6 will be described below. As the artificial lung 6, a hollow fiber membrane type artificial lung is used. The hollow fiber membrane type artificial lung in the illustrated configuration example is an external perfusion type artificial lung, and a blood inlet port 63 and a blood outlet port 64 are provided at the upper and lower ends of the main body 60 for accommodating a bundle of hollow fibers. There is. Further, a gas supply part 61 and a gas discharge part 62 communicating with the inside of the hollow fiber are provided at the upper and lower ends of the main body 60, and the gas supply part 61 and the gas discharge part 62 are provided with a gas supply part. A port 611 and the gas discharge port 621 are provided respectively. A blood processing unit is formed in the space from the blood inlet 63 to the blood outlet 64 via the hollow fiber space. The oxygen-containing gas flowing in from the gas supply port 611 passes through the hollow fiber, while oxygen is added to the blood flowing outside the hollow fiber through a large number of pores in the hollow fiber to decarbonate it. And is discharged from the gas discharge port 621. The artificial lung 6 may be of an internal perfusion type in which blood is allowed to flow inside the hollow fiber and oxygen-containing gas is allowed to flow outside.

The blood inlet 63 of the artificial lung 6 and
The blood outlet 431 of the heat exchanger 4 is connected by the connecting tube 7, and the inside of the heat exchanger 4 and the blood processing unit of the artificial lung 6 are in communication with each other.

At the upper part of the blood processing apparatus constructed as described above, that is, the upper part of the heat exchanger 4 in the apparatus of the present embodiment, the joint portion 5 for connecting to the blood reservoir 1 is directed upward. It is provided. As shown in FIG. 4, the joint portion 5 includes two concentric cylinders 5 having different diameters.
0a, 50b, and an annular fitting portion 51 is formed by the inner cylindrical body 50b. The fitting portion 51 is
Fitted portion 3 of joint portion 3 provided on the bottom surface of blood reservoir 1
1 is inserted. The cylindrical body 50a slides inside the cylindrical body 30a, and the cylindrical body 50b slides outside the cylindrical body 30b. Here, the inner cylindrical body 50b is the outer cylindrical body 50b.
It is formed higher than a and the cylindrical body 30b on the blood reservoir side, which facilitates the joining of the joining portion 3 and the joining portion 5.

When the joint portion 3 and the joint portion 5 are joined to each other, the upper edge of the cylindrical body 50b contacts the bottom surface 25 of the blood reservoir 1. In other words, only the upper edge of the cylindrical body 50b receives the weight of the blood reservoir 1.

The relationship between the inner cylindrical body 50b and the cylindrical body 30b may be reversed, and the lower end edge of the cylindrical body 30b is
The structure may be such that it abuts on the upper surface 46 of the heat exchanger 4. Alternatively, the heights of the cylindrical body 50b and the cylindrical body 30b may be made equal to each other, and the upper end edge and the lower end edge may respectively contact the bottom surface 25 of the blood reservoir 1 and the upper surface 46 of the heat exchanger 4. Good. With such a structure, the weights of the respective cylindrical bodies 30b and 50b are shared, the resistance at the time of rotation is reduced, and the stability at the joint portion during the rotating operation is improved. In addition, the outer cylindrical body 30a and the cylindrical body 50
By fitting with a, the stability at the joint portion during the rotating operation is further improved.

On the other hand, on the outer peripheral surface of the outer cylindrical body 50a,
A groove 513 is provided as a restriction portion. The groove 51
3 is in the circumferential direction on the outer peripheral surface of the outer cylindrical body 50a,
It is provided all around. The tip of a claw 81 of the lock member 8 described later is inserted into the groove 513. The groove 513 is formed at a position corresponding to the hole 314 formed in the cylindrical body 30a at the time of joining. And
At the time of joining, a lock member 8 as a locking means is fitted onto the joining portions 3 and 5. As shown in FIG. 5, the lock member 8 has a structure having three pin-shaped pawls 81 inside a C-ring-shaped main body 80.

The main body 80 has a certain elasticity, expands the C ring shape, and is fitted onto the outer cylindrical body 30a. Nail 81
Is provided at a position corresponding to each of the holes 314,
At the time of mounting, it is inserted into each layer 314. At this time, the nail 8
The tip of No. 1 reaches the inside of the groove 513. With the claw 81 of the lock member 8, the joint portion 3 and the joint portion 5 are
It does not come off in the axial direction, and the joined state is reliably maintained.

When the blood reservoir 1 and the blood processing apparatus are rotated relative to each other in this state, the claw 81 moves in the groove 513, so that the degree of freedom of rotation is maintained. Further, when it is necessary to set the rotation angle, the groove 513 may have a predetermined length. As another configuration example of the locking means, for example, there is a structure in which a pin constituting the claw 81 is prepared separately and is inserted into each hole 314 separately.

In the above structure, the fitting portion 51 and the fitting portion 31 rotatably join the blood reservoir 1 and the blood processing apparatus. Therefore, the blood processing apparatus can be installed in any direction with respect to the blood storage tank 1. In particular, the centers of the cylindrical bodies 50a and 50b coincide with the center of the cylindrical housing 40 of the heat exchanger 4.
Thereby, even if the blood processing apparatus is rotated with respect to the blood storage tank 1, the direction of the tube connection port can be selected without changing the position of the blood processing apparatus with respect to the blood storage tank 1.
That is, the main body of the blood processing apparatus is set to the protruding portion 20 of the blood storage tank 1.
It can be installed in any direction without being interfered by 1.

Here, the blood inlet 421 of the heat exchanger 4
The connection ports such as the heat medium supply pipe 44, the supply port 441 and the discharge port 451 of the heat medium discharge pipe 45 are obliquely downward along the rotation axis direction of the blood processing apparatus, or parallel to the rotation axis. It is located in. Therefore, as shown in FIG. 6, even if the blood processing apparatus is rotated, there is no problem that these connection ports interfere with the protrusion 201 of the blood reservoir 1. Further, for example, when packing and storing, FIG.
By setting the angle as shown in (1) and rotating it by 90 ° during use, it becomes possible to improve the transportation efficiency by keeping the storage space small (the state shown in FIG. 6) during packaging.

The joint portion 3 is composed of the fitting portion 31 and the outer cylindrical body 30a, and the joint portion 5 is composed of the fitting portion 51 and the outer cylindrical body 50a, but the joint portion 3 is fitted. The joint portion 5 may be configured by only the fitting portion 51 by using only the portion 31. Further, the fitted portion 31 and the fitted portion 51 may be constituted by outer cylindrical bodies 30a and 50a, and further, outer and inner cylindrical bodies 30a and 50a,
It may be configured with 30b and 50b.

The above cylindrical bodies 30a and 30b and the cylindrical body 5
0a and 50b may be provided on the opposite side of the above embodiment. That is, the cylinders 30a and 30b are on the upper surface 46 of the heat exchanger 4, and the cylinders 50a and 50b are on the bottom surface 2 of the blood reservoir 1.
5 can also be provided.

Further, a structure may be adopted in which a positioning mechanism is provided at the joint portion so that the joint is positioned at a desired rotation position. As the positioning mechanism, for example, as shown in FIG. 7, the convex portion 9 is provided on one of the surfaces of the outer cylindrical bodies 30a and 50a or the inner cylindrical bodies 30b and 50b that are in sliding contact with each other.
a, and a structure in which a plurality of recesses 9b are formed on the other side can be adopted. In this configuration, the convex portion 9a is replaced by any of the concave portions 9b.
Is positioned at a position engaged with. By providing such a positioning mechanism, the installation direction of the blood reservoir 1 can be reliably ensured even if the tension of the connected tube is applied during the operation.

In addition to the above, the shapes of the fitting portion 51 and the fitting portion 31 may be, for example, a cylindrical fitting portion and a fitting portion that is hollowed into the same cylindrical shape. Any shape of the rotating body may be used. Such a fitting portion 51,
As for the shape of the fitting part 31, the contour of the cross section is circular,
This allows them to rotate relative to each other.

In the embodiment of the present invention described above, the blood processing apparatus is composed of the heat exchanger 4 and the artificial lung 6, but the other blood processing apparatus is only the artificial lung. In addition, the protruding portion 201 of the blood reservoir 1
It may have a structure having a heat exchanger therein. In this case, the joint part 5 is provided on the upper surface of the artificial lung.

The blood reservoir according to the present invention has been described above with reference to the illustrated constitutional example, but the present invention is not limited to this.

[0056]

As described above, according to the blood reservoir integrated with the blood processing apparatus of the present invention, both the orientation of the blood reservoir and the installation orientation of the blood processing apparatus can be set as required.

When the blood processing apparatus is composed of the heat exchanger and the artificial lung, the number of other apparatus to be arranged can be reduced and the installation space can be further reduced. If the joint part is fitted in the axial direction and joined, assembly becomes easy,
Set time is shortened.

Further, when the lock means is provided at the joint portion, troubles such as disassembly of the blood reservoir and the blood processing device are prevented during use or at the time of setting, and safety is improved.

[Brief description of drawings]

FIG. 1 is an overall side view showing a configuration example of a blood reservoir integrated with a blood processing apparatus of the present invention.

FIG. 2 is an overall front view showing a configuration example of a blood reservoir integrated with a blood processing device of the present invention.

FIG. 3 is an overall rear view showing a configuration example of a blood storage device integrated blood reservoir according to the present invention.

FIG. 4 is a rear cross-sectional view showing the structure of the joint portion of the blood storage device integrated blood reservoir according to the present invention.

FIG. 5 is an overall plan view of a lock member attached to a joint portion.

FIG. 6 is an overall side view showing a state in which the blood processing device is rotated by 90 ° in the configuration example of the blood storage device integrated blood reservoir according to the present invention.

FIG. 7 is a partial cross-sectional view of the joint, showing a configuration of a positioning mechanism provided at the joint.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Blood reservoir 2 Housing 21 Blood storage space 20 Housing main body 201 Projection part 22 Lid body 221a Blood inflow port 221b Blood inflow port 221c Priming fluid injection port 221d Degassing port 221e Intracardiac blood inflow port 23 Blood outflow port 24a, 24b Defoaming Device 25 Bottom surface 3 Joint parts 30a, 30b Cylindrical body 31 Fitting part 314 Hole 4 Heat exchanger 40 Housing 401 Fitting part 41 Heat exchange part 411 Straight pipe 42 Blood inflow part 421 Blood inflow part 43 Blood outflow part 431 Blood flow Outlet 44 Heat medium supply pipe 441 Supply port 45 Heat medium discharge pipe 451 Discharge port 46 Upper surface 5 Joined portion 51 Fitted portion 50a, 50b Cylindrical body 513 Groove 6 Artificial lung 60 Main body 61 Gas supply portion 611 Gas supply port 62 Gas discharge portion 621 Gas outlet 63 Blood inlet 64 Blood outlet 7 Continued tube 8 locking member 80 body 81 claw 9a protrusion 9b recess

Claims (1)

[Claims] 1. A blood reservoir having a projecting portion that is eccentric to a part of the bottom surface and projects downward, and a side of the blood reservoir on which the projecting portion is provided is a front side, and a back side of the projecting portion. A blood processing apparatus integrated blood reservoir having a blood processing apparatus joined to a lower side of the bottom surface, wherein a bottom surface of the blood tank and an upper portion of the blood processing apparatus that are joined to each other are joined to each other. A blood storage device-integrated blood storage tank, comprising: a joint that allows the blood processing device and the blood storage tank to rotate relative to each other.