JP4080767B2 - Method and apparatus for discharging residual liquid - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a residual liquid discharging method and a discharging apparatus for discharging residual liquid remaining in a blood circuit and a blood purifier after blood purification work.
[0002]
[Prior art]
In general, a dialysis apparatus connects a blood circuit to a blood introduction port and a blood outlet port formed in a blood purifier, and punctures a patient with an arterial puncture needle and a venous side puncture needle connected to the tip of the blood circuit. The blood of the patient is circulated in the blood circuit, while the dialyzer body is connected to the dialysate introduction port and the dialysate outlet port of the blood purifier so that the dialysate is supplied to the dialysate flow passage in the blood purifier. The patient's blood is purified by flowing it and moving unnecessary substances in the blood into the dialysate through the dialysis membrane.
[0003]
Here, the blood circuit and blood purifier are generally exchangeable with respect to the dialyzer body, and a new one is used for each dialysis treatment. A predetermined dialysis treatment is performed after cleaning (priming) by flowing physiological saline in advance. The blood remaining in the blood circuit and the blood purifier after dialysis treatment was returned to the patient's body by sending physiological saline and air into the blood circuit and the blood purifier (hereinafter, this work is returned). Called blood collection).
[0004]
Among these, blood return recovery by sending air is performed by driving the blood pump with the venous puncture needle punctured while the arterial puncture needle tip removed from the patient is opened. It is an operation performed by sucking air from the arterial puncture needle, and the sucked air sends blood in the blood circuit or blood purifier to the vein side and returns the blood from the vein side puncture needle to the patient's body. is there.
[0005]
However, such blood return collection with air may cause air to enter the patient's body if the operation is inadequate. Blood collection has been widely adopted. Such blood return recovery using physiological saline is performed by connecting the extracted arterial puncture needle to a saline bag or by connecting a saline bag to a branch pipe on the suction side of the blood pump. This is a method of feeding saline.
[0006]
[Problems to be solved by the invention]
However, according to the above-described conventional blood return collection with physiological saline, the physiological circuit is filled in the blood circuit or blood purifier at the end of the blood return collection. There is a possibility that an operator accident may occur due to scattering to the surroundings, and the weight of the waste is increased by the amount of the remaining residual liquid, resulting in a large processing cost.
[0007]
However, it is also possible to discharge the residual liquid remaining in the blood circuit and blood purifier after returning the blood to a bucket etc., reducing the weight at the time of disposal and reducing the processing cost. As a result, manual work and a disinfecting work such as a bucket are separately required, and workability is deteriorated. In addition, when the liquid is discharged into the bucket, the residual liquid is accidentally scattered to the surrounding area, which may cause an infection accident.
[0008]
The present invention has been made in view of such circumstances, and reduces the weight of the blood circuit and the blood purifier that are discarded by discharging the residual liquid remaining in the blood circuit and the blood purifier after the return of blood. Another object is to provide a residual liquid discharging method and apparatus capable of improving workability and safety in the residual liquid discharging operation.
[0009]
[Means for Solving the Problems]
According to the first aspect of the present invention, a blood circuit comprising an arterial blood circuit and a venous blood circuit having a blood pump for circulating the patient's blood outside the body and sending it back into the body, and the blood flowing through the blood circuit are passed. A blood purifier in which a blood flow passage and a dialysate flow passage for allowing dialysate to pass therethrough are formed, and a blood purification membrane is provided between the blood flow passage and the dialysate flow passage, and the dialysate flow of the blood purifier The blood circuit and blood after the patient's blood is purified and returned to blood using a dialyzer equipped with a dialyzer body that supplies dialysate to the channel and discharges the dialysate that has passed through the dialysate flow passage. In the method for discharging residual liquid for discharging residual liquid remaining in the purifier, blood flow in the blood purifier while connecting the arterial blood circuit and the venous blood circuit and driving the blood pump. And the dialysate flow passage, and the residual fluid in the blood flow passage is sent to the dialysate flow passage through the blood purification membrane at the differential pressure, thereby the blood circuit and the blood. The residual liquid in the purifier is discharged to the dialyzer body, and part of the venous blood circuit is opened to the atmosphere during the discharge of the residual liquid from the start of discharge to the end of discharge. To do.
[0011]
The invention according to claim 2 uses the dialysis machine in which a dialysis fluid in the dialysis fluid flow passage is discharged or a circulation pump for assisting the discharge is disposed in a dialysis fluid discharge path of the dialysis machine body. After purifying the patient's blood, the circulating pump is driven to lower the dialysate flow path than the blood flow path, and the residual pressure in the blood flow path is transferred to the dialysate flow path by the generated differential pressure. It is characterized by sending.
[0013]
According to a third aspect of the present invention, in the state in which the arterial blood circuit tip and the venous blood circuit tip in the blood circuit are connected, the residual fluid of the blood circuit and the blood purifier is discharged to the dialyzer body. Features.
[0014]
According to a fourth aspect of the present invention, there is provided a blood circuit comprising an arterial blood circuit and a venous blood circuit having a blood pump for circulating the patient's blood outside the body and sending it back into the body, and allows the blood flowing through the blood circuit to pass therethrough. A blood purifier in which a blood flow passage and a dialysate flow passage for allowing dialysate to pass therethrough are formed, and a blood purification membrane is provided between the blood flow passage and the dialysate flow passage, and the dialysate flow of the blood purifier The blood circuit and blood after the patient's blood is purified and returned to blood using a dialyzer equipped with a dialyzer body that supplies dialysate to the channel and discharges the dialysate that has passed through the dialysate flow passage. In the residual liquid discharging apparatus for discharging the residual liquid remaining in the purifier, the blood flow in the blood purifier while connecting the arterial blood circuit and the venous blood circuit and driving the blood pump. And the dialysate flow passage, and the residual fluid in the blood flow passage is sent to the dialysate flow passage through the blood purification membrane at the differential pressure, thereby the blood circuit and the blood. The residual liquid in the purifier is discharged to the dialyzer body, and part of the venous blood circuit is opened to the atmosphere during the discharge of the residual liquid from the start of discharge to the end of discharge. To do.
[0016]
The invention according to claim 5 uses the dialysis machine in which a dialysis fluid in the dialysis fluid flow passage is discharged or a circulation pump for assisting the discharge is disposed in the dialysate discharge path of the dialysis machine body. After purifying the patient's blood, the circulating pump is driven to lower the dialysate flow path than the blood flow path, and the residual pressure in the blood flow path is transferred to the dialysate flow path by the generated differential pressure. It is characterized by sending.
[0018]
Invention of Claim 6 has a connection means for connecting the artery side blood circuit front-end | tip and the vein side blood circuit front-end | tip in the said blood circuit, and the said blood circuit and blood purification in the connection state by this connection means The residual liquid of the vessel is discharged to the dialyzer body.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.
First, a dialysis machine to which the residual liquid discharging method according to this embodiment is applied will be described. Such a dialysis device purifies the patient by collecting blood from the patient and moving unnecessary substances in the blood through the dialysis membrane into the dialysate, and returns the purified blood to the patient's body again. It is mainly composed of a blood circuit 1, a dialyzer 2 (blood purifier), and a dialyzer body 3.
[0020]
The blood circuit 1 includes an upstream blood circuit 1a to which a drip chamber 4 for defoaming is connected and an iron blood pump 6 is disposed, and a downstream side to which a drip chamber 5 for defoaming is connected. The blood circuit 1b is connected to the blood introduction port 2a of the dialyzer 2, and the downstream blood circuit 1b is connected to the blood outlet port 2b. The blood circuit 1 is mainly composed of a flexible tube, and in particular, the portion where the blood pump 6 is disposed is composed of a flexible tube having a larger diameter and more flexibility than the others.
[0021]
A connector 1aa is attached to the distal end of the upstream blood circuit 1a. An arterial puncture needle a is attached to the connector 1aa, and a similar connector 1ba is also attached to the distal end of the downstream blood circuit 1b. The venous puncture needle b is attached to the connector 1ba. The puncture needles a and b are punctured into the patient, blood is introduced into the blood circuit 1, and circulated outside the body via the dialyzer 2 to return.
[0022]
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 casing, and a dialysate inlet port 2c and a dialysate outlet port 2d on the upper surface. It is formed. A plurality of hollow fiber membranes 2e (blood purification membranes) are disposed in the housing, and blood flowing through the blood circuit 1 through the blood introduction port 2a and the blood outlet port 2b communicates with the inside of the hollow fiber membrane 2e. While forming a blood flow path that can be passed, the space between the outer peripheral surface of the hollow fiber membrane 2e and the housing is supplied from the dialyzer main body 3 through the dialysate introduction port 2c and the dialysate outlet port 2d. The dialysate flow path through which the dialysate can be passed is formed.
[0023]
Further, since the hollow fiber membrane 2e is formed with a plurality of micropores, when the blood passes through the blood flow passage across the hollow fiber membrane 2e and the dialysate passes through the dialysate flow passage, the hollow fiber It is configured such that unnecessary substances (waste materials) in the blood can be removed by dialysis to the dialysate side through the membrane 2e. In the figure, reference numeral 2f denotes a sealing agent that allows the hollow fiber membrane 2e to communicate with the blood introduction port 2a in a fluid-tight manner.
[0024]
The dialyzer body 3 has a dialysate introduction line L1 and a dialysate discharge line L2 connected to the dialysate introduction port 2c and the dialysate lead-out port 2d of the dialyzer 2, respectively. The dialysis fluid is supplied and the dialysis fluid that has passed through the dialysis fluid flow path is discharged, and is mainly composed of a reciprocating pump (double pump) 7, a circulation pump 8, and a water removal pump 9. ing.
[0025]
The reciprocating pump 7 has a single plunger 7a disposed across the dialysate introduction line L1 and the dialysate discharge line L2, and the dialysate in the dialysate introduction line L1 is reciprocated by the plunger 7a. Is supplied from the dialysate introduction port 2c of the dialyzer 2, and the dialysate passing through the dialysate flow path is discharged from the dialysate outlet port 2d via the dialysate discharge line L2.
[0026]
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 lower chamber in the figure). The side chamber) is configured to communicate with the dialysate discharge line L2. Thereby, during the normal dialysis treatment, when the plunger 7a moves upward, the upper pump head sends the dialysate toward the dialyzer 2, and the lower pump head sends the dialysate from the dialyzer 2 to the dialysate. When the plunger 7a moves downward, the liquid is not fed to the dialyzer 2, the upper pump head sucks dialysate from the liquid supply port direction, and the lower pump head is the drainage of the device. Liquid is delivered to the mouth.
[0027]
The dialysate discharge line L2 includes a water removal line L3 extending around the reciprocating pump 7 from the upstream side to the downstream side of the reciprocating pump 7, and a water removal line L3 bypassing the reciprocating pump 7. A bypass line L4 to be bypassed is connected. Note that a chamber 11 is connected to a branch portion between the dialysate discharge line L2 and the bypass line L4, so that bubbles mixed in the dialysate can be separated and the bubbles can be discharged to the outside via the bypass line L4. It is configured as follows. A branch pipe may be used instead of the chamber 11.
[0028]
Further, a water removal pump 9 is connected to the water removal line L3, and a bypass line shutoff valve 10 capable of blocking the flow of dialysate is connected to the bypass line L4. Of these, when the water removal pump 9 is driven, the flow rate of the fluid discharged from the dialysate 2 supplied to the dialyzer 2 is increased, and moisture can be removed from the blood passing through the blood flow passage.
[0029]
The circulation pump 8 is composed of a pressure pump such as a cascade pump, a gear pump or a vane pump connected to the dialysate discharge line L2, and is upstream of the pump chamber on the drain side of the reciprocating pump 7 (the dialysate discharge line). The pressure of the line between the circulation pump 8 and the reciprocating pump 7 in L2 is adjusted, and the pressure is upstream of the pump chamber on the liquid feed side of the reciprocating pump 7 (the dialysate supply source side). Are controlled to be substantially equal to each other.
[0030]
In order to perform hemodialysis treatment with the dialysis apparatus, the patient is punctured with the arterial puncture needle a and the venous puncture needle b, and the blood pump 6 and the reciprocating pump 7 are driven. Then, blood is collected from the patient's artery by the squeezing action of the blood pump 3 and flows through the arterial blood circuit 1a. After defoaming is performed in the drip chamber 4, the blood is 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 is introduced into the dialyzer 2 from the dialysate introduction port 2c. During the normal dialysis treatment, the bypass line shutoff valve 10 is closed.
[0031]
The blood introduced into the dialyzer 2 passes through the blood flow passage in the hollow fiber membrane 2e, and the supplied dialysate passes through the dialysate flow passage between the outer peripheral surface of the hollow fiber membrane 2e and the housing of the dialyzer 2. In the process, blood comes into contact with the dialysate through the hollow fiber membrane 2e, and the blood is dialyzed and purified. Thereafter, the purified blood is led out from the blood outlet port 2b, subjected to bubble removal in the drip chamber 5, and then returned to the patient's body by the venous puncture needle b.
[0032]
Further, the dialysate mixed with unnecessary blood (spent waste) by dialysis purification is discharged from the dialysate outlet port 2d to the dialysate discharge line L2. At the time of water removal, in addition to the above operation, the water removal pump 9 is driven so that the amount of discharge from the dialyzer 2 is larger than the amount supplied to the dialyzer 2 by the reciprocating pump 7, and the difference is removed from the blood. As a result, the water is removed.
[0033]
When the dialysis treatment is completed, blood return collection is performed to return the blood remaining in the blood circuit 1 and the dialyzer 2 to the patient's body. In such blood return collection, the arterial puncture needle a is removed from the patient, and the arterial puncture needle a is connected to a saline bag containing physiological saline, or the saline bag is attached to the branch pipe on the suction side of the blood pump 6. This is performed by driving the blood pump 6 in a connected state.
[0034]
As a result, the 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 to the venous puncture needle b side and returned to the patient's body. It can be done. After such blood return collection, the physiological circuit (residual liquid) sucked from the saline bag is filled in the blood circuit 1 and the dialyzer 2.
[0035]
The method for discharging the residual liquid in the present embodiment is to discharge the residual liquid in such a state to the dialyzer main body 3. As shown in FIG. 2, the arterial puncture needle a and the venous side puncture needle b are connected to each other. It removes from connector 1aa and connector 1ba, and it carries out in the state which connected both connectors. As shown in FIG. 4, normally, protective caps 12 (connecting means) are attached to the distal ends of the arterial blood circuit 1a and the venous blood circuit 1b and protect the connectors 1aa and 1ba. One of the caps 12 is used to connect both connectors in a liquid-tight manner as shown in FIG.
[0036]
In addition to connecting the connectors using the protective cap 12 that is normally disposed as described above, a separate connecting means 13 may be used as shown in FIG. This connecting means 13 is made of a soft PVC tube or a silicon tube, and can be connected with the arterial puncture needle a and the venous puncture needle b being attached to the connectors 1aa and 1ba. Each connector is configured to be liquid-tightly connected to the outer peripheral surfaces of the connectors 1aa and 1ba.
[0037]
According to the connecting means 13, since the arterial puncture needle a and the venous side puncture needle b can be connected while being attached and the remaining liquid can be discharged thereafter, workability in a series of residual liquid discharging operations can be improved. In addition to the improvement, it is possible to prevent the residual liquid from splashing around when the puncture needle is removed from the connector.
[0038]
In the connected state, the bypass line shut-off 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 dewatering pump 9 are in a stopped state. However, due to the squeezing action of the blood pump 6, the residual liquid in the blood circuit 1 flows into the blood flow passage of the dialyzer 2 (that is, the hollow fiber membrane). 2e), and by driving the circulation pump 8, the liquid pressure of the residual liquid in the blood flow path becomes relatively higher than that of the dialysate in the dialysate flow path.
[0039]
When the residual liquid is discharged, the liquid level adjustment line or the pressure monitor line connected to the drip chamber 5 is opened to the atmosphere to replace the residual liquid and air in the blood circuit 1 with air. There is a need. That is, when the connectors 1aa and 1ba are connected to make the blood circuit 1 a closed circuit, the residual liquid cannot be discharged to the dialyzer body 3 side unless a replacement medium such as air is introduced into the blood circuit 1 by some means. Because.
[0040]
On the other hand, since the dialysate in the dialysate flow path is discharged to the dialysate discharge line L2 by driving the circulation pump 8, the dialysate flow path is set to a pressure lower than that of the blood flow path. Residual liquid in the blood flow path is sent to the dialysate flow path through the hollow fiber membrane 2e by synergy with the differential pressure based on driving. The rotation speed of the blood pump 6 is most preferably about 90% of the drainage speed. However, the blood pump 6 can be drained by a rotation speed other than that speed.
[0041]
The residual liquid sent to the dialysate flow path reaches the chamber 11 through 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 pass but does not allow air to pass therethrough, when the residual liquid sent from the blood introduction port 2a disappears and changes to air, the air is directly used as the blood outlet port of the dialyzer 2 It is discharged from 2b. As a result, the residual liquid in the portion upstream 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, from which the operation of the blood pump 6 is performed. It reaches the arterial blood circuit 1a, is introduced into the dialyzer 2, and is discharged to the dialyzer body 3 side.
[0042]
After the residual fluid discharge operation, the dialysate introduction line L1 is disconnected 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 introduction port 2c, and all the dialysate in the dialysate flow passage is discharged to the dialysate discharge line L2.
[0043]
In order to automatically perform such an operation, for example, as shown in FIG. 7, a branch line 1 whose tip is opened to the atmosphere in advance is connected to the dialysate introduction line L1, and an electromagnetic valve or the like is provided in the middle of the branch line l. An air suction shut-off valve 14 is provided. After the residual liquid is discharged, air is introduced into the dialyzer 2 from the dialysate introduction port 2c by opening the air suction shut-off valve 14, and all of the dialysate in the dialysate flow path enters the dialysate discharge line L2. It may be configured to be discharged.
[0044]
According to the method for discharging the residual liquid, since the residual liquid remaining in the blood circuit 1 and the dialyzer 2 is discharged to the dialyzer body 3, the weight of the discarded blood circuit 1 and the blood purifier 2 is reduced, Compared with the case of discharging the residual liquid from the tip of the blood circuit 1, the workability in the discharge operation of the residual liquid can be improved. Moreover, since the tips of the blood circuit 1 are connected to each other, it is possible to avoid the residual liquid from being scattered to the surroundings and improve the safety.
[0045]
Although the present embodiment has been described above, the present invention is not limited to this. For example, as shown in FIG. 8, the residual liquid may be discharged by driving the water removal pump 9. In this case, as in the previous embodiment, the connector 1aa at the distal end of the arterial blood circuit 1a is connected to the connector 1ba at the distal end of the venous blood circuit 1b, while the bypass line shut-off valve 10 is closed and discharged. . That is, the residual liquid pulled from the blood flow path to the dialysate flow path by driving the water removal pump 9 reaches the chamber 11 via the dialysate discharge line L2, and is discharged outside the apparatus via the water removal line L3. It is.
[0046]
Furthermore, as shown in FIG. 9, it extends from the upstream side of the circulation pump 8 in the dialysate discharge line L2 to the line downstream of the drain side pump chamber in the reciprocating pump 7, and has an electromagnetic valve 15 in the middle thereof. The residual liquid may be discharged using the bypass line L5 (which is normally provided in the dialyzer main body 3 but may be newly installed if it is not present). 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 is higher than that of the liquid flow path, and the residual liquid in the blood circuit 1 and the dialyzer 2 can be discharged to the dialyzer main body 3 by the differential pressure.
[0047]
In the present embodiment, the present invention is applied to an arterial puncture needle a connected to the tip of the arterial blood circuit 1a and a venous puncture needle b connected to the tip of the venous blood circuit 1b (double needle). However, the present invention may be applied to a single needle (having one puncture needle and branching into an arterial blood circuit 1a and a venous blood circuit 1b with a branch tube). When using a single needle, when the treatment is completed and the arterial shunt connector is removed from the single needle connector, blood loss can be prevented by clamping means or a coffell (forceps) attached to the single needle to prevent blood leakage. is necessary.
[0048]
In the present embodiment, the reciprocating pump 7 is disposed in the dialysis apparatus main body 3 and the dialysate is discharged while being supplied to the dialyzer 2 side by driving the reciprocating pump 7. However, the present invention may be applied to other than the reciprocating pump 7 (for example, chamber type).
[0049]
【The invention's effect】
According to the invention of claim 1 and claim 4 , since the residual liquid remaining in the blood circuit and blood purifier is discharged to the dialyzer body, the weight of the discarded blood circuit and blood purifier is reduced, The workability and safety in discharging the residual liquid can be improved.
[0050]
Further , according to the invention of claim 1 and claim 4 , 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 dialyzed by the differential pressure. Since it is discharged to the apparatus main body, it is not necessary to add new means separately, and the discharge operation can be performed.
[0051]
According to the invention of claim 2 and claim 5 , the circulating pump is driven to make the dialysate flow path lower than the blood flow path, and the residual liquid in the blood flow path is removed by the generated differential pressure. Therefore, the remaining liquid in the blood circuit and the blood purifier can be discharged to the dialyzer body without separately providing new means. Further, since the blood pump is driven together with the circulation pump, the residual liquid in the blood circuit can be sent into the blood purifier, and the residual liquid can be more smoothly sent to the dialyzer body for discharge. it can.
[0053]
According to the third and sixth aspects of the invention, since the residual fluid is discharged in a state where the distal end of the arterial blood circuit and the distal end of the venous side blood circuit are connected, the blood circuit and the blood purifier are more accurately detected. The residual liquid can be discharged into the dialyzer body.
[Brief description of the drawings]
FIG. 1 is a schematic diagram showing a blood circuit, a blood purifier, and a dialyzer body to which a residual liquid discharging method according to an embodiment of the present invention is applied. FIG. 2 is a schematic view showing a residual liquid discharging method 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 residual liquid according to an embodiment of the present invention is applied. Fig. 4 is a discharge of residual liquid according to an embodiment of the present invention. FIG. 5 is a schematic diagram showing the connection means in the blood circuit to which the method is applied. FIG. 5 is a schematic diagram showing the state of connection by the connection means in the blood circuit to which the method for discharging residual liquid according to the embodiment of the present invention is applied. 6 is a schematic view showing another connection means in a blood circuit to which the method for discharging residual liquid according to the embodiment of the present invention is applied. FIG. 7 shows another method for discharging residual liquid according to the embodiment of the present invention. [FIG. 8] Residue according to another embodiment of the present invention Schematic view for illustrating a residual liquid method discharge according to another embodiment of the schematic diagram Fig. 9 present invention for illustrating a method for discharging EXPLANATION OF REFERENCE NUMERALS
DESCRIPTION OF SYMBOLS 1 ... Blood circuit 1a ... Arterial side blood circuit 1b ... Vein side blood circuit 2 ... Dializer (blood purifier)
2e ... Hollow fiber membrane (blood purification membrane)
DESCRIPTION OF SYMBOLS 3 ... Dialyzer main body 4, 5 ... Drip chamber 6 ... Blood pump 7 ... Reciprocating pump 8 ... Circulation pump 9 ... Dewatering pump 10 ... Bypass line shutoff valve 11 ... Chamber 12 ... Protective cap (connecting means)
13 ... Connection means 14 ... Air suction shut-off valve

Claims (6)

A blood circuit comprising an arterial blood circuit and a venous blood circuit having a blood pump to circulate the patient's blood outside the body and send it back into the body;
A blood purifier in which a blood flow passage for passing blood flowing through the blood circuit and a dialysate flow passage for allowing dialysate to pass therethrough are formed, and a blood purification membrane is interposed between the blood flow passage and the dialysate flow passage. When,
A dialysis machine body for supplying dialysate to the dialysate flow passage of the blood purifier and discharging the dialysate that has passed through the dialysate flow passage;
In the method for discharging the residual liquid for discharging the residual liquid remaining in the blood circuit and the blood purifier after the patient's blood purification and return blood collection using a dialysis apparatus comprising:
A differential pressure is generated between the blood flow passage and the dialysate flow passage in the blood purifier while connecting the arterial blood circuit and the venous blood circuit and driving the blood pump, The residual liquid in the blood flow passage is sent to the dialysate flow passage through the blood purification membrane at the above, thereby discharging the residual liquid in the blood circuit and the blood purifier to the dialyzer body, and the residual liquid A method for discharging a residual liquid, characterized in that a part of the venous blood circuit is opened to the atmosphere during the discharge from the start to the end of discharge.   After purifying the patient's blood using the dialysis device disposed in the dialysate discharge path of the dialyzer body, a circulation pump for discharging the dialysate in the dialysate flow passage or assisting the discharge, The dialysate flow path is made lower than the blood flow path by driving the circulation pump, and the residual liquid in the blood flow path is sent to the dialysate flow path with the generated differential pressure. The method for discharging the residual liquid according to 1.   The residual fluid of the blood circuit and the blood purifier is discharged to the dialyzer body in a state where the tip of the arterial blood circuit and the tip of the venous blood circuit in the blood circuit are connected. Item 3. A method for discharging a residual liquid according to Item 2. A blood circuit comprising an arterial blood circuit and a venous blood circuit having a blood pump to circulate the patient's blood outside the body and send it back into the body;
A blood purifier in which a blood flow passage for passing blood flowing through the blood circuit and a dialysate flow passage for allowing dialysate to pass therethrough are formed, and a blood purification membrane is interposed between the blood flow passage and the dialysate flow passage. When,
A dialysis machine body for supplying dialysate to the dialysate flow passage of the blood purifier and discharging the dialysate that has passed through the dialysate flow passage;
In the apparatus for discharging residual liquid for discharging the residual liquid remaining in the blood circuit and the blood purifier after blood purification and return blood collection of the patient using a dialysis apparatus comprising:
A differential pressure is generated between the blood flow passage and the dialysate flow passage in the blood purifier while connecting the arterial blood circuit and the venous blood circuit and driving the blood pump, The residual liquid in the blood flow passage is sent to the dialysate flow passage through the blood purification membrane at the above, thereby discharging the residual liquid in the blood circuit and the blood purifier to the dialyzer body, and the residual liquid A device for discharging residual liquid, characterized in that a part of the venous blood circuit is opened to the atmosphere from the start of discharge to the end of discharge.   After purifying the patient's blood using the dialysis device disposed in the dialysate discharge path of the dialyzer body, a circulation pump for discharging the dialysate in the dialysate flow passage or assisting the discharge, The dialysate flow path is made lower than the blood flow path by driving the circulation pump, and the residual liquid in the blood flow path is sent to the dialysate flow path with the generated differential pressure. 4. A discharge device for residual liquid according to 4.   A connecting means for connecting the distal end of the arterial blood circuit and the distal end of the venous blood circuit in the blood circuit; 6. The residual liquid discharging apparatus according to claim 4, wherein the residual liquid discharging apparatus is configured to discharge the residual liquid.

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