JP2003265600A - Method and device for discharging remaining fluid - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and a device for discharging the remaining fluid in which the weight of a blood circuit and a hemocatharsis tool, which discharges the remaining fluid remaining within the blood circuit and it after autotransfusion recovery and is discarded, is reduced and the workability and safety in the discharging work of the remaining fluid can be improved. <P>SOLUTION: The discharging method for the remaining fluid for discharging the remaining fluid remaining in the blood circuit 1 and a dialyzer 2 after hemocatharsis and autotransfusion recovery of a patient using a dialyzing device provided with the blood circuit 1, the dialyzer 2 (the hemocatharsis tool), and a dialyzing device body 3, wherein the remaining fluid in the blood circuit 1 and the dialyzer 2 is discharged to the dialyzing device body 3 by sending to a dialyzing fluid circulating path 1 the remaining fluid in a blood circulating path via the hollow fiber membrane 2e within the dialyzer 2. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a residual liquid discharging method and a discharging device for discharging residual liquid remaining in a blood circuit and a blood purifier after a blood purifying operation.

[0002]

2. Description of the Related Art In general, a dialysis machine connects a blood circuit to a blood inlet port and a blood outlet port formed in a blood purifier, and an arterial puncture needle and a venous puncture needle connected to the tip of the blood circuit. While puncturing the patient with the needle to circulate the patient's blood in the blood circuit, connect the dialyzer body to the dialysate inlet port and dialysate outlet port of the blood purifier to connect the dialysate inside the blood purifier. This is to purify the patient's blood by causing the dialysate to flow through the passage and moving unnecessary substances in the blood into the dialysate through the dialysis membrane.

Here, the blood circuit and the blood purifier are:
Generally, a new one is used for each dialysis treatment so that it can be exchanged with the main body of the dialysis machine, and cleaning is performed by flowing physiological saline in advance to the new blood circuit and blood purifier after replacement (priming). After that, prescribed dialysis treatment is performed. Then, the blood remaining in the blood circuit and the blood purifier after the dialysis treatment was returned to the patient's body by sending physiological saline or air into the blood circuit and the blood purifier (hereinafter, this work is returned. Called blood collection).

Of these, blood recovery by sending air is performed by driving the blood pump with the tip of the arterial puncture needle removed from the patient in an open state and the vein side puncture needle puncturing the patient. Is a work performed by sucking air from the artery side puncture needle, and the sucked air sends the blood in the blood circuit or blood purifier to the vein side and the blood from the vein side puncture needle into the patient's body. It is something to return.

However, there is a risk that air will enter the patient's body if there is an error in the operation of blood recovery by air, and in recent years there has been a tendency not to do so. It is better to collect blood by
It has been widely adopted. The blood return recovery with such physiological saline is performed by connecting the extracted arterial puncture needle to a saline bag or connecting a saline bag to the suction pipe branch of the blood pump, instead of the air described above. It is a method of sending in saline.

[0006]

However, according to the above-described conventional blood return collection using physiological saline, physiological saline is filled in the blood circuit or blood purifier at the end of the blood return collection. However, if it is discarded as it is, there is a risk that the residual liquid will scatter around and an infection accident may occur to workers, and the weight of the waste will increase by the amount of the residual liquid remaining, resulting in a large treatment cost. There was a problem that it would end up.

However, the residual liquid remaining in the blood circuit and the blood purifier after the return of blood is discharged into a bucket or the like,
Although it may be possible to reduce the weight at the time of disposal and reduce the processing cost, separate manual work for discharge and disinfection work such as a bucket are required, which deteriorates workability and There was a risk that accidental infection could occur when the residual liquid was accidentally scattered around during the discharge work.

The present invention has been made in view of the above circumstances, and the weight of the blood circuit and the blood purifier to be discarded after discharging the residual liquid remaining in the blood circuit and the blood purifier after blood recovery. It is an object of the present invention to provide a method and a device for discharging a residual liquid, which can reduce the amount of the liquid and improve the workability and safety in the operation of discharging the residual liquid.

[0009]

The invention according to claim 1 is
A blood circuit consisting of an arterial blood circuit and a venous blood circuit for circulating the patient's blood outside the body and returning it to the body, a blood flow passage for passing the blood flowing through the blood circuit, and a dialysate circulation for passing the dialysate. A blood purifier in which a passage is formed and a blood purification membrane is provided between the blood flow passage and the dialysate flow passage, and the dialysate is supplied to the dialysate flow passage of the blood purifier and the dialysate flow passage After the patient's blood is purified by using a dialysis machine equipped with a dialysis machine main body for discharging the dialysis solution that has passed through the passage, the discharge of the residual solution for discharging the residual solution remaining in the blood circuit and the blood purifier. In the method, the residual liquid in the blood flow passage is sent to the dialysate flow passage through the blood purification membrane to discharge the residual liquid in the blood circuit and the blood purifier to the dialyzer body. To do.

According to a second aspect of the present invention, a differential pressure is generated between the blood flow passage and the dialysate flow passage in the blood purifier, and the residual pressure in the blood circuit and the blood purifier is generated by the differential pressure. It is characterized in that it is discharged to the main body of the dialysis machine.

According to a third aspect of the present invention, the dialyzer is provided with a circulation pump for discharging or assisting the discharge of the dialysate in the dialysate flow passage in the dialysate discharge path of the dialyzer body. After purifying the blood of the patient by using, the pressure of the dialysate flow passage is made lower than that of the blood flow passage by driving the circulation pump, and the residual liquid in the blood flow passage is dialyzed by the generated differential pressure. It is characterized in that it is sent to the flow passage.

According to a fourth aspect of the present invention, the blood pump is driven after the blood of the patient is purified by using the blood circuit having the blood pump in the arterial blood circuit.

According to a fifth aspect of the present invention, the residual liquid of the blood circuit and the blood purifier is discharged to the dialyzer main body in a state where the arterial blood circuit tip and the venous blood circuit tip in the blood circuit are connected. It is characterized by doing.

According to a sixth aspect of the present invention, a blood circuit composed of an arterial blood circuit and a venous blood circuit for circulating the blood of the patient outside the body and returning the blood to the body, and a blood circulation for passing the blood flowing through the blood circuit. And a dialysate flow passage through which a dialysate is passed, a blood purifier having a blood purification membrane between the blood flow passage and the dialysate flow passage, and a dialysate flow passage of the blood purifier. While supplying dialysate,
For discharging the residual liquid remaining in the blood circuit and the blood purifier after purifying the blood of the patient using the dialyzer equipped with the dialyzer main body for discharging the dialysate passing through the dialysate flow passage. In the residual liquid discharge device, the residual liquid in the blood flow passage is sent to the dialysate flow passage through the blood purification membrane to discharge the residual liquid in the blood circuit and the blood purifier to the dialyzer body. It is characterized by

According to a seventh aspect of the present invention, a differential pressure is generated between the blood flow passage and the dialysate flow passage in the blood purifier, and the residual pressure in the blood circuit and the blood purifier is caused by the differential pressure. It is characterized in that it is discharged to the main body of the dialysis machine.

The invention according to claim 8 is characterized in that the dialyzer in which the dialysate in the dialysate flow passage is discharged or a circulation pump for assisting the discharge is arranged in the dialysate discharge path of the dialyzer body. After purifying the blood of the patient by using, the pressure of the dialysate flow passage is made lower than that of the blood flow passage by driving the circulation pump, and the residual liquid in the blood flow passage is dialyzed by the generated differential pressure. It is characterized in that it is sent to the flow passage.

The invention according to claim 9 is characterized in that the blood circuit having a blood pump in the arterial blood circuit is used to drive the blood pump after purifying the blood of the patient.

According to a tenth aspect of the present invention, there is provided a connecting means for connecting the tip of the arterial blood circuit and the tip of the venous blood circuit in the blood circuit, and the blood circuit in the connection state by the connecting means. And the residual liquid of the blood purifier is discharged to the main body of the dialysis device.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be specifically described below with reference to the drawings. First, a dialysis device to which the method for discharging the residual liquid according to this embodiment is applied will be described. Such a dialysis device is for collecting blood of a patient and purifying it by moving unnecessary substances in the blood into a dialysate through a dialysis membrane, and returning the purified blood to the body of the patient again, Blood circuit 1 and dialyzer 2
(Blood purifier) and the dialyzer main body 3 are mainly configured.

The blood circuit 1 is connected to an upstream blood circuit 1a to which a drip chamber 4 for defoaming is connected and an ironing type blood pump 6 is arranged, and a drip chamber 5 for defoaming. And a downstream blood circuit 1b, of which the upstream blood circuit 1a is a dialyzer 2
The downstream blood circuit 1b is connected to the blood introduction port 2a of FIG. The blood circuit 1 is mainly composed of a flexible tube, and particularly in a portion where the blood pump 6 is disposed, it is composed of a flexible tube having a larger diameter and a higher flexibility than the others.

A connector 1aa is attached to the tip of the upstream blood circuit 1a.
The artery side puncture needle a is attached to a, and the same connector 1ba is attached to the tip of the downstream blood circuit 1b, and the vein side puncture needle b is attached to this connector 1ba. . The patient is punctured with these puncture needles a and b to introduce blood into the blood circuit 1,
It circulates outside the body via the dialyzer 2 and returns.

As shown in FIG. 3, the dialyzer 2 has a blood introduction port 2a and a blood outlet port 2b formed on both side surfaces of a substantially cylindrical housing, and a dialysate inlet port 2c and a dialysate outlet port on the upper surface. The port 2d is formed. A plurality of hollow fiber membranes 2e (blood purification membranes) are arranged in the housing, and the inside of the hollow fiber membranes 2e communicates the blood introduction port 2a and the blood discharge port 2b with each other to collect blood flowing in the blood circuit 1. While forming a blood flow passage that can pass through, the space between the outer peripheral surface of the hollow fiber membrane 2e and the housing is supplied from the dialyzer body 3 by communicating the dialysate inlet port 2c and the dialysate outlet port 2d. It forms a dialysate flow path through which the dialysate can pass.

Since the hollow fiber membrane 2e is formed with a plurality of microscopic holes, when blood passes through the blood flow passage and the dialysate passes through the dialysate flow passage with the hollow fiber membrane 2e interposed therebetween, The hollow fiber membrane 2e is configured so that unnecessary substances (waste substances) in blood can be dialyzed and removed to the dialysate side. In addition, reference numeral 2f in the figure denotes a sealant for fluid-tightly communicating the hollow fiber membrane 2e with the blood introduction port 2a.

The dialyzer body 3 has a dialysate introduction line L1 and a dialysate discharge line L2 connected to the dialysate inlet port 2c and the dialysate outlet port 2d of the dialyzer 2, respectively. It supplies dialysate to the flow passage and discharges the dialysate that has passed through the flow passage, and mainly comprises a reciprocating pump (complex pump) 7, a circulation pump 8 and a water removal pump 9. Is configured.

The reciprocating pump 7 is a dialysate introduction line L1.
And a dialysate discharge line L2, and a single plunger 7a disposed across the dialysate discharge line L2. The reciprocating motion of the plunger 7a supplies the dialysate in the dialysate introduction line L1 from the dialysate introduction port 2c of the dialyzer 2. In addition, the dialysate that has passed through the dialysate flow passage is discharged from the dialysate outlet port 2d through the dialysate discharge line L2.

That is, the pump chamber of the reciprocating pump 7 is divided into two by the plunger 7a, and one chamber (the upper chamber in FIG. 1) communicates with the dialysate introduction line L1 and the other chamber (the same chamber). The lower chamber in the figure) is connected to the dialysate discharge line L2. As a result, during normal dialysis treatment, when the plunger 7a moves upward, the upper pump head sends the dialysate to the dialyzer 2, and the lower pump head from the dialyzer 2 to the dialyser 2. On the other hand, when the plunger 7a moves downward, liquid is not sent to the dialyzer 2, the upper pump head sucks dialysate from the direction of the supply port, and the lower pump head sucks the drainage of the device. Liquid is delivered to the mouth.

Further, in the dialysate discharge line L2, a water removal line L3 extending from the upstream side to the downstream side of the reciprocating pump 7 bypassing the reciprocating pump 7 and water removing while bypassing the reciprocating pump 7. Detour line L4 that bypasses line L3
And are connected. A chamber 11 is connected to a branch point between the dialysate discharge line L2 and the bypass line L4 to separate bubbles mixed in the dialysate and to discharge the bubbles to the outside through the bypass line L4. Is configured. A branch pipe may be used instead of the chamber 11.

Further, a water removal pump 9 is connected to the water removal line L3, and a bypass line cutoff valve 10 capable of blocking the flow of dialysate is connected to the bypass line L4. Of these, when the dewatering pump 9 is driven, the flow rate of the dialysate discharged to the dialyzer 2 becomes larger, and water can be removed from the blood passing through the blood flow passage.

The circulation pump 8 is composed of a pressurizing pump such as a cascade pump, a gear pump or a vane pump connected to the dialysate discharge line L2, and is located upstream of the pump chamber on the drainage side of the reciprocating pump 7 (dialysis). The pressure of a line between the circulation pump 8 and the reciprocating pump 7 in the liquid discharge line L2 is adjusted so that the pressure is upstream of the pump chamber on the liquid sending side of the reciprocating pump 7 (on the dialysate supply source side). The pressure is controlled so as to be substantially equal to the pressure in (1).

To perform hemodialysis treatment with the above dialysis device, the patient is punctured with the arterial puncture needle a and the venous puncture needle b, respectively, and the blood pump 6 and the reciprocating pump 7 are driven. Then, blood is collected from the artery of the patient by the squeezing action of the blood pump 3, flows through the arterial blood circuit 1a, is defoamed in the drip chamber 4, and is then introduced into the dialyzer 2 from the blood introduction port 2a. On the other hand, the dialysate flows through the dialysate introduction line L1 and enters the dialysate introduction port 2c.
Is introduced into the dialyzer 2. During the normal dialysis treatment, the bypass line cutoff valve 10 is closed.

The blood introduced into the dialyzer 2 passes through the blood flow passage in the hollow fiber membrane 2e, and the supplied dialysate is dialyzed between the outer peripheral surface of the hollow fiber membrane 2e and the housing of the dialyzer 2. Passing through the liquid flow passage, in the process,
Blood comes into contact with the dialysate through the hollow fiber membrane 2e, and dialysis purification of the blood is performed. Then, the purified blood is discharged from the blood discharge port 2b, defoamed in the drip chamber 5, and then returned to the patient's body by the vein side puncture needle b.

Further, the dialysate mixed with unnecessary substances (waste products) of blood by the dialysis purification is discharged from the dialysate outlet port 2d to the dialysate discharge line L2. When removing water,
In addition to the above operation, the water removal pump 9 is driven so that the amount discharged from the dialyzer 2 is made larger than the amount supplied to the dialyzer 2 by the reciprocating pump 7, and the difference is compensated by the water removed from the blood. Water is removed as a result.

Upon completion of the dialysis treatment, blood return collection is performed in which the blood remaining in the blood circuit 1 and the dialyzer 2 is returned to the patient's body. Such return blood collection is performed by the arterial puncture needle a.
To remove blood from the patient and connect the artery side puncture needle a to a saline bag containing physiological saline, or drive the blood pump 6 with the saline bag connected to the branch pipe on the suction side of the blood pump 6. Done by.

As a result, physiological saline flows through the blood circuit 1 by the squeezing action of the blood pump 6, and the blood remaining in the blood circuit 1 and the dialyzer 2 is sent out to the venous puncture needle b side, and enters the patient's body. It can be returned. After the blood return is collected, the physiological saline (residual liquid) sucked from the saline bag is filled in the blood circuit 1 and the dialyzer 2.

The method for discharging the residual liquid in this embodiment is as follows.
The residual liquid in such a state is discharged to the dialyzer main body 3, and as shown in FIG. 2, the arterial-side puncture needle a and the venous-side puncture needle b are removed from the connector 1aa and the connector 1ba, and both connectors are attached. It is done in the connected state.
As shown in FIG. 4, the connector 1a is usually attached to each tip of the arterial blood circuit 1a and the venous blood circuit 1b.
A protective cap 12 (connecting means) for protecting a and 1ba is provided, and one of the protective caps 12 is used to liquid-tightly connect both connectors as shown in FIG.

In addition to connecting the two connectors by using the protective cap 12 which is normally arranged as described above, a separate connecting means 13 may be used as shown in FIG. . The connecting means 13 is made of a soft vinyl chloride tube, a silicon tube, or the like, and is connectable with the arterial puncture needle a and the venous puncture needle b attached to the connectors 1aa and 1ba. It is configured to be liquid-tightly connected to the outer peripheral surfaces of the connectors 1aa and 1ba, respectively.

According to the connecting means 13, the arterial-side puncture needle a and the vein-side puncture needle b are connected while being attached,
Since the residual liquid can be discharged thereafter, it is possible to improve the workability in the series of discharging the residual liquid and prevent the residual liquid from scattering around when the puncture needle is pulled out from the connector. be able to.

In the connected state, the bypass line shutoff valve 10 is kept open, and both the blood pump 6 and the circulation pump 8 are driven. At this time, the reciprocating pump 7 and the water removal pump 9 are in a stopped state, but due to the squeezing action of the blood pump 6, the residual liquid in the blood circuit 1 is in the blood flow passage of the dialyzer 2 (that is, the hollow fiber membrane). 2e) and the circulation pump 8 is driven so that the liquid pressure of the residual liquid in the blood flow passage becomes relatively higher than that of the dialysate in the dialysate flow passage.

During the operation of discharging the residual liquid, the tip of the liquid level adjusting line or the pressure monitor line connected to the drip chamber 5 is opened to the atmosphere so that blood and air in the blood circuit 1 are separated from each other. Need to be replaced. That is, when the blood circuit 1 is closed by connecting the connectors 1aa and 1ba, the residual liquid cannot be discharged to the dialyzer main body 3 side unless a replacement medium such as air is introduced into the blood circuit 1 by some means. Because.

On the other hand, since the dialysate in the dialysate flow passage is discharged to the dialysate discharge line L2 by driving the circulation pump 8, the dialysate flow passage is made to have a relatively lower pressure than the blood flow passage. The residual liquid in the blood flow passage is sent to the dialysate flow passage through the hollow fiber membrane 2e in synergy with the differential pressure based on the driving of the pump 6. The most suitable rotation speed of the blood pump 6 is about 90% of the drainage speed, but drainage can be performed at a rotation speed other than that speed.

The residual liquid sent to the dialysate flow passage reaches the chamber 11 via the dialysate discharge line L2, and is discharged from the apparatus through the bypass line L4. here,
Since the hollow fiber membrane of the dialyzer 2 allows water to permeate but does not allow air to permeate, when the residual liquid sent from the blood introducing port 2a disappears and changes to air, the air is discharged from the blood extracting port 2b of the dialyzer 2 as it is. To be done. As a result, the residual liquid in the upstream side of the drip chamber 5 in the venous blood circuit 1b is pushed out by the air discharged from the blood outlet port 2b and reaches the drip chamber 5, so that the blood pump 6 operates from there. Reach the arterial blood circuit 1a, dialyzer 2
It is introduced into the inside and discharged to the dialysis machine main body 3 side.

After the residual liquid discharge work, the dialysate introduction line L1
Is removed from the dialysate introduction port 2c of the dialyzer 2, and the circulation pump 8 is driven for a while. As a result, air is introduced into the dialyzer 2 from the opened dialysate inlet port 2c, and all the dialysate in the dialysate flow passage is discharged to the dialysate discharge line L2.

In order to automatically perform such an operation, for example, as shown in FIG. 7, a branch line 1 whose tip is open to the atmosphere is connected to the dialysate introduction line L1 in advance, and the branch line 1 is provided in the middle thereof. An air intake cutoff valve 14 including a solenoid valve is provided. And after the residual liquid discharge work,
By opening the air suction shutoff valve 14, air is introduced into the dialyzer 2 from the dialysate introducing port 2c,
The dialysate in the dialysate flow passage may be entirely discharged to the dialysate discharge line L2.

According to the above method of discharging the residual liquid, the residual liquid remaining in the blood circuit 1 and the dialyzer 2 is discharged to the dialyzer main body 3, so that the weight of the discarded blood circuit 1 and blood purifier 2 is reduced. In addition, the workability in discharging the residual liquid can be improved as compared with the case where the residual liquid is discharged from the tip of the blood circuit 1. Moreover, since the tips of the blood circuit 1 are connected to each other, it is possible to avoid the residual liquid from splashing to the surroundings and improve the safety.

Although the present embodiment has been described above, the present invention is not limited to this, and the residual liquid may be discharged by driving the water removing pump 9 as shown in FIG. 8, for example. In this case, the connector 1aa at the tip of the arterial blood circuit 1a and the venous blood circuit 1 as in the previous embodiment.
While connecting to the connector 1ba at the tip of b, the bypass line shutoff valve 10 is discharged in the closed state. That is,
The residual liquid pulled by the drive of the water removal pump 9 from the blood flow passage to the dialysate flow passage reaches the chamber 11 via the dialysate discharge line L2 and is discharged to the outside of the apparatus via the water removal line L3. .

Further, as shown in FIG. 9, the dialysate discharge line L2 extends from the upstream side of the circulation pump 8 to the line of the reciprocating pump 7 downstream of the drainage side pump chamber, and a solenoid valve is provided on the way. The detour line L5 having 15 (usually provided in the dialysis machine main body 3, but may be newly installed if it does not exist) may be used to discharge the residual liquid. That is, as shown in the figure, if the line connecting the blood outlet port 2b of the dialyzer 2 to the drip chamber 5 is clamped and the blood pump 6 is driven in such a state, the blood flow passage in the dialyzer 2 is dialyzed. The pressure becomes higher than that of the liquid flow passage, and the residual pressure in the blood circuit 1 and the dialyzer 2 is caused by the differential pressure, and the dialyzer main body 3
It can be discharged to.

In this embodiment, an arterial puncture needle a is connected to the tip of the arterial blood circuit 1a, and a venous puncture needle b is connected to the tip of the venous blood circuit 1b (double needle). Although the invention is applied, it may be applied to a single needle (having a single puncture needle and branching into an arterial blood circuit 1a and a venous blood circuit 1b by a branch pipe). When using a single needle, when the treatment is completed and the arterial shunt connector is removed from the single needle connection part, in order to prevent blood leakage, the blood loss can be prevented by using the clamp means attached to the single needle or the koffel (forceps). is necessary.

Further, in the present embodiment, the reciprocating pump 7 is provided in the dialysis machine main body 3 and the reciprocating pump 7 is provided.
Although the present invention is applied to the configuration in which the dialysate is supplied to the dialyzer 2 side while being driven by the above, the invention may be applied to other than the reciprocating pump 7 (for example, a chamber type). .

[0049]

According to the inventions of claim 1 and claim 6,
The residual liquid remaining in the blood circuit and blood purifier is discharged to the main body of the dialysis machine, reducing the weight of the discarded blood circuit and blood purifier, and improving workability and safety in the work of discharging the residual liquid. Can be improved.

According to the inventions of claims 2 and 7, a differential pressure is generated between the blood flow passage and the dialysate flow passage, and the residual liquid in the blood circuit and the blood purifier is generated by the differential pressure. Since the liquid is discharged to the main body of the dialysis device, it is possible to perform the discharging work without the need to additionally provide a new means.

According to the third and eighth aspects of the invention, the circulating pump is driven to make the dialysate flow passage lower in pressure than the blood flow passage, and the residual liquid in the blood flow passage is dialyzed by the generated differential pressure. Since it is sent to the liquid flow passage, it is possible to discharge the residual liquid in the blood circuit and the blood purifier to the dialyzer main body without separately adding new means.

According to the inventions of claims 4 and 9, since the blood pump is driven together with the driving of the circulation pump, the residual liquid in the blood circuit can be sent into the blood purifier, and it can be carried out more smoothly. The residual liquid can be sent to the main body of the dialyzer and discharged.

According to the inventions of claims 5 and 10,
Since the residual liquid is discharged while the tip of the arterial blood circuit and the tip of the venous blood circuit are connected, the residual liquid of the blood circuit and the blood purifier can be discharged to the dialyzer body more accurately.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing a blood circuit, a blood purifier, and a dialysis apparatus main body to which a method for discharging a residual liquid according to an embodiment of the present invention is applied.

FIG. 2 is a schematic diagram showing a method for discharging a residual liquid according to an embodiment of the present invention.

FIG. 3 is a partially cutaway view showing a blood purifier to which a method for discharging a residual liquid according to an embodiment of the present invention is applied.

FIG. 4 is a schematic diagram showing a connecting means in a blood circuit to which a method for discharging a residual liquid according to an embodiment of the present invention is applied.

FIG. 5 is a schematic diagram showing a state of being connected by a connecting means in a blood circuit to which the method for discharging a residual liquid according to the embodiment of the present invention is applied.

FIG. 6 is a schematic diagram showing another connecting means in the blood circuit to which the method for discharging the residual liquid according to the embodiment of the present invention is applied.

FIG. 7 is a schematic diagram showing another method for discharging residual liquid according to the embodiment of the present invention.

FIG. 8 is a schematic diagram showing a method for discharging a residual liquid according to another embodiment of the present invention.

FIG. 9 is a schematic diagram showing a method for discharging a residual liquid according to another embodiment of the present invention.

[Explanation of symbols]

1 ... Blood circuit 1a ... Arterial blood circuit 1b ... venous blood circuit 2 ... Dializer (Blood Purifier) 2e ... Hollow fiber membrane (blood purification membrane) 3 ... Dialysis machine body 4, 5 ... Drip chamber 6 ... Blood pump 7 ... Reciprocating pump 8 ... Circulation pump 9 ... Water removal pump 10 ... Detour line shutoff valve 11 ... Chamber 12 Protective cap (connection means) 13 ... Connection means 14 ... Shut-off valve for air intake

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Claims (10)

[Claims] 1. A blood circuit comprising an arterial blood circuit and a venous blood circuit for circulating blood of a patient outside the body and returning it to the body, a blood flow passage for passing blood flowing through the blood circuit, and a dialysate. A dialysate flow passage for passing the blood is formed, and a dialysate is supplied to the dialysate flow passage of the blood purifier, and a blood purifier having a blood purification membrane between the blood passage and the dialysate flow passage. , A residual dialysate remaining in the blood circuit and the blood purifier after blood purification and blood return recovery of the patient using a dialyzer equipped with a dialyzer body for discharging the dialysate passing through the dialysate flow passage. In the method of discharging the residual liquid for discharging the residual liquid in the blood circuit and the blood purifier, the residual liquid in the blood flow passage is sent to the dialysate flow passage through the blood purification membrane. Discharge to the device body A method for discharging a residual liquid, comprising: 2. A differential pressure is generated between a blood flow passage and a dialysate flow passage in the blood purifier, and the residual liquid in the blood circuit and the blood purifier is discharged to the dialyzer body by the differential pressure. The method according to claim 1, wherein the residual liquid is discharged. 3. A patient's blood using the dialyzer, wherein a circulation pump for discharging or assisting the discharge of the dialysate in the dialysate flow passage is arranged in the dialysate discharge path of the dialyzer body. After purifying the liquid, the dialysate flow passage is made to have a lower pressure than the blood flow passage by driving the circulation pump, and the residual liquid in the blood flow passage is sent to the dialysate flow passage by the generated differential pressure. The method for discharging a residual liquid according to claim 2, which is characterized in that. 4. The residual liquid discharge according to claim 3, wherein the blood pump is driven after the blood of the patient is purified by using the blood circuit having the blood pump in the arterial blood circuit. Method. 5. The residual liquid of the blood circuit and the blood purifier is discharged to the dialyzer main body in a state where the tip of the arterial blood circuit and the tip of the vein side blood circuit in the blood circuit are connected. The method for discharging the residual liquid according to any one of claims 1 to 4. 6. A blood circuit comprising an arterial blood circuit and a venous blood circuit for circulating the blood of the patient outside the body and returning it to the body, a blood flow passage for passing blood flowing through the blood circuit, and a dialysate. A dialysate flow passage through which the dialysate flows is formed, and a dialysate is supplied to the dialysate flow passage of the blood purifier, and a blood purifier having a blood purification membrane inside the blood passage and the dialysate flow passage. , A residual dialysate remaining in the blood circuit and the blood purifier after blood purification and blood return recovery of the patient using a dialyzer equipped with a dialyzer body for discharging the dialysate passing through the dialysate flow passage. In the residual liquid discharging device for discharging the liquid, the residual liquid in the blood circuit and the blood purifier is dialyzed by sending the residual liquid in the blood flow passage to the dialysate flow passage through the blood purification membrane. Discharge to the device body A device for discharging a residual liquid, characterized by: 7. A differential pressure is generated between the blood flow passage and the dialysate flow passage in the blood purifier, and the residual liquid in the blood circuit and the blood purifier is discharged to the dialyzer main body by the differential pressure. 7. The residual liquid discharge device according to claim 6, wherein: 8. A patient's blood using the dialyzer in which a circulation pump for discharging or assisting the discharge of the dialysate in the dialysate flow passage is arranged in the dialysate discharge path of the dialyzer body. After purifying the liquid, the dialysate flow passage is made to have a lower pressure than the blood flow passage by driving the circulation pump, and the residual liquid in the blood flow passage is sent to the dialysate flow passage by the generated differential pressure. The discharge device for residual liquid according to claim 7, which is characterized in that. 9. The residual liquid discharge according to claim 8, wherein the blood pump is driven after the blood of the patient is purified by using the blood circuit having a blood pump in the arterial blood circuit. apparatus. 10. The blood circuit further comprises a connecting means for connecting an arterial blood circuit tip and a venous blood circuit tip, and the blood circuit and the blood purifier remain in a connected state by the connecting means. The liquid is discharged to the dialyzer main body, and the residual liquid discharging device according to any one of claims 6 to 9.