JP2022063103A - Coelomic fluid treatment system and method for using coelomic fluid treatment system - Google Patents

Abstract

To restrain an increase in the pressure of a concentrator when recovering ascitic fluid remaining in a line in an ascitic fluid treatment system.SOLUTION: An ascitic fluid treatment system 1 comprises an ascitic fluid bag 10, a filter 11, a concentrator 12, a concentrated ascitic fluid bag 13, a first liquid delivery line 14, a second liquid delivery line 15, a third liquid delivery line 16, a fourth liquid delivery line 17, a first pump 51 provided in the second liquid delivery line 15, a second pump 60 provided in the third liquid delivery line 16, a gas introduction part 53 capable of introducing gas to a gas introduction position provided in the second liquid delivery line 15 downstream of the first pump 51, and a check valve 65 provided in the fourth liquid delivery line 17, and for preventing backflow to the concentrator 12.SELECTED DRAWING: Figure 1

Description

The present invention relates to a body cavity fluid treatment system and a method of using the body cavity fluid treatment system.

As a treatment method for ascites, which is one of the body cavity fluids, ascites is taken out from the patient, pathogenic substances such as bacteria and cancer cells are removed from the ascites, and the ascites is concentrated with useful components such as albumin remaining. There is ascites filtration concentrated reinfusion therapy (Cell-free and Concentrated Ascites Reinfusion Therapy) that returns ascites to the body.

An ascites treatment system is generally used for such a treatment method. In this ascites treatment system, for example, an ascites bag, a filter, a concentrator, and a concentrated ascites bag are connected in this order by a liquid feeding line, and ascites is flowed by a pump of the liquid feeding line to filter and concentrate the ascites. Is used (see Patent Document 1). In such an ascites treatment system, for example, pumps are provided on the upstream side and the downstream side of the concentrator, respectively, and the ascites is concentrated to a predetermined concentration in the concentrator by adjusting the flow rates of the two pumps.

In the ascites treatment system as described above, the ascites remaining in the liquid feeding line at the end of the filtration and concentration treatment of the ascites is collected in the concentrated ascites bag. The recovery of the residual ascites in the liquid feeding line is performed by operating two pumps as in the case of, for example, filtering and concentrating the ascites.

Japanese Unexamined Patent Publication No. 2019-013491

By the way, when the residual ascites is recovered in the ascites treatment system as described above, the pressure of the concentrator (Trans Membrane Pressure (TMP)) increases due to clogging of the concentrating membrane of the concentrator, and the ascites. The processing system may stop. If the ascites treatment system is stopped in the middle of collecting the residual ascites, the work of the medical staff is required and the time required for the ascites treatment becomes long, which is not preferable.

The present invention has been made in view of this point, and is a body cavity fluid treatment system and a body cavity fluid that can suppress an increase in the pressure of the concentrator when collecting the body cavity fluid such as ascites remaining in the line. Its purpose is to provide a method of using the processing system.

As a result of diligent studies, the present inventors have found that the above problem can be solved by providing a gas introduction section upstream of the concentrator and a backflow prevention section in the liquid feed line through which the drainage of the concentrator passes. Has been completed.

That is, the present invention includes the following aspects.
(1) A body cavity fluid treatment system for treating body cavity fluid, which includes a housing unit for accommodating body cavity fluid and a housing unit.
A filter, a concentrator, a collection unit in which the body cavity liquid is collected, a first liquid supply line for supplying the body cavity liquid in the storage unit to the filter, and a body cavity liquid filtered by the filter. The second liquid feeding line that feeds the liquid to the concentrator, the third liquid feeding line that feeds the body cavity liquid concentrated by the concentrator to the collecting unit, and the drainage removed by the concentrator. A fourth liquid feeding line for discharging, a first pump provided in the first liquid feeding line or the second liquid feeding line, and a second pump provided in the third liquid feeding line. A gas introduction unit capable of introducing a gas and a gas introduction unit provided in the fourth liquid supply line at the gas introduction position provided in the second liquid supply line or the filter downstream of the first pump. A body cavity fluid treatment system comprising a backflow prevention unit for preventing backflow to the concentrator.
(2) Recovery in which the first pump is stopped, the second pump is operated, gas is introduced from the gas introduction section, and the body cavity liquid located downstream of the gas introduction position is recovered in the recovery section. The body cavity fluid treatment system according to (1), further comprising a control unit for executing the process.
(3) The control unit operates the first pump and the second pump before the recovery step, and the filtered body cavity liquid in the filter is in the second liquid feeding line. The body cavity liquid treatment system according to (2), which executes a pre-step of moving to the downstream side from the gas introduction position.
(4) The first pump is provided in the second liquid feeding line, and the body cavity liquid treatment system collects the body cavity liquid of the collecting portion upstream of the first pump in the second liquid feeding line. Further provided with a fifth liquid feeding line to feed the liquid to the merging position on the side, the control unit stops the second pump after the recovery step and moves the first pump in the reverse direction at the time of processing. The body cavity liquid treatment system according to (3), wherein the gas is introduced from the gas introduction part, and a post-step of recovering the body cavity liquid in the fifth liquid feeding line to the recovery part is executed.
(5) A method of using a body cavity fluid treatment system for treating a body cavity fluid, which is a storage unit for accommodating the body cavity fluid, a filter, a concentrator, a collection unit for collecting the body cavity fluid, and the storage unit. A first liquid feeding line that feeds the body cavity liquid to the filter, a second liquid feeding line that feeds the body cavity liquid filtered by the filter to the concentrator, and a concentrated liquid in the concentrator. A third liquid feeding line that feeds the body cavity liquid to the recovery unit, a fourth liquid feeding line that discharges the drainage liquid removed by the concentrator, and the first liquid feeding line or the second liquid feeding line. A first pump provided in the liquid feeding line, a second pump provided in the third liquid feeding line, and a second liquid feeding line or filter downstream of the first pump. A body cavity liquid treatment system including a gas introduction unit capable of introducing gas and a backflow prevention unit provided in the fourth liquid feeding line to prevent backflow to the concentrator at the gas introduction position provided in the above. The first pump is stopped, the second pump is operated, gas is introduced from the gas introduction section, and the body cavity liquid located downstream of the gas introduction position is collected in the recovery section. How to use a body cavity fluid treatment system to perform a recovery process.
(6) Before the recovery step, the first pump and the second pump are operated, and the filtered body cavity liquid in the filter is downstream from the gas introduction position in the second liquid feeding line. The method of using the body cavity fluid treatment system according to (5), wherein the pre-step of moving to the side is performed.
(7) The first pump is provided in the second liquid feeding line, and the body cavity liquid treatment system collects the body cavity liquid of the collecting portion upstream of the first pump in the second liquid feeding line. A fifth liquid feeding line is further provided at the confluence position on the side, and after the recovery step, the second pump is stopped, the first pump is operated in the reverse direction at the time of processing, and the gas is discharged. The method of using the body cavity liquid treatment system according to (6), wherein a gas is introduced from the introduction part and a post-step of collecting the body cavity liquid in the fifth liquid feeding line to the recovery part is executed.

According to the present invention, in the body cavity liquid treatment system, it is possible to suppress an increase in the pressure of the concentrator when collecting the body cavity liquid remaining in the line.

It is explanatory drawing which shows the outline of the structure of the ascites treatment system. It is explanatory drawing which shows the state of the ascites treatment system at the time of a reconcentration treatment. It is explanatory drawing which shows the state of the ascites treatment system at the time of the ascites recovery process. It is explanatory drawing which shows the state of the ascites treatment system at the time of the pre-process of a recovery process. It is explanatory drawing which shows the state of the ascites treatment system at the time of the post-process of a recovery process. It is explanatory drawing which shows the structure of the ascites treatment system when the 1st pump is provided in the 1st liquid feeding line. It is explanatory drawing which shows the structure of the ascites treatment system when the gas introduction position is provided in the filter.

Hereinafter, an example of a preferred embodiment of the present invention will be described with reference to the drawings. Unless otherwise specified, the positional relationship such as up, down, left, and right in the present specification shall be based on the positional relationship shown in the drawings.

FIG. 1 is an explanatory diagram showing an outline of the configuration of an ascites treatment system 1 as a body cavity fluid treatment system according to the present embodiment.

The ascites treatment system 1 includes an ascites bag 10 as a body cavity fluid accommodating portion, a filter 11, a concentrator 12, a concentrated ascites bag 13 as a concentrator cavity fluid recovery unit, and a first liquid feeding line 14. , 2nd liquid feeding line 15, 3rd liquid feeding line 16, 4th liquid feeding line 17, 5th liquid feeding line 18, 6th liquid feeding line 19, control unit 20 and the like. It is equipped with.

The ascites bag 10 is, for example, a soft bag and can contain ascites collected from a patient.

The filter 11 has, for example, a cylindrical housing. The filter 11 has liquid passage ports 11a and 11b at both ends in the longitudinal direction (vertical direction), and has two liquid passage ports 11c and 11d on the side surfaces. In this specification, the upper and lower parts of the ascites treatment system 1 are based on the posture during normal use.

The filter 11 includes a filter membrane 30 that removes a predetermined causative substance such as bacteria and cancer cells and allows a predetermined useful component such as albumin to pass through. The filtration membrane 30 is composed of, for example, a large number of hollow fiber membranes. The space 30a on the primary side of the filtration membrane 30 (internal space of the hollow fiber membrane) 30a leads to the liquid passage ports 11a and 11b, and the space 30b on the secondary side of the filtration membrane 30 (outer space of the hollow fiber membrane) 30b allows liquid to pass through. It leads to the mouths 11c and 11d.

The concentrator 12 has, for example, a cylindrical housing. The concentrator 12 has liquid passage ports 12a and 12b at both ends in the longitudinal direction (vertical direction), and has two liquid passage ports 12c and 12d on the side surfaces.

The concentrator 12 includes, for example, a concentrating membrane 40 that removes water from ascites and concentrates it. The concentrated film 40 is composed of, for example, a large number of hollow fiber membranes. The space 40a on the primary side of the concentrated membrane 40 (inner space of the hollow fiber membrane) 40a leads to the liquid passage ports 12a and 12b, and the space on the secondary side of the concentrated membrane 40 (outer space of the hollow fiber membrane) 40b allows liquid to pass through. It leads to the mouths 12c and 12d.

The concentrated ascites bag 13 is, for example, a soft bag and can contain concentrated ascites concentrated by the concentrator 12.

The first liquid feeding line 14 connects the ascites bag 10 and the filter 11. The upstream end of the first liquid feeding line 14 is connected to the ascites bag 10, and the downstream end of the first liquid feeding line 14 is connected to the liquid passing port 11a of the filter 11. .. That is, the liquid passage port 11a of the filter 11 is an inlet of the filter 11 into which ascites flows. The first liquid feeding line 14 is provided with a first valve 41 for opening and closing the first liquid feeding line 14. In the present specification, the "upstream side" indicates the direction in which the ascites flows toward the upstream side during normal ascites treatment in which the filter 11 and the concentrator 12 flow in this order, and the "downstream side" means the normal ascites. Indicates the direction to the downstream side during processing.

The upstream end of the sixth liquid feeding line 19 is connected to the liquid passing port 11b of the filter 11. The downstream end of the sixth liquid feeding line 19 is connected to, for example, a waste liquid portion (not shown) containing the drainage liquid removed from the ascites by the filter 11.

A gas introduction section 46 for introducing gas into the filter 11 through the line 45 is connected to the liquid passage port 11c of the filter 11. The gas introduction unit 46 is, for example, an atmosphere open unit.

The second liquid feeding line 15 connects the filter 11 and the concentrator 12. The upstream end of the second liquid feeding line 15 is connected to the liquid passing port 11d of the filter 11, and the downstream end of the second liquid feeding line 15 is the passing of the upper end of the concentrator 12. It is connected to the liquid port 12a. That is, the liquid passage port 11d of the filter 11 is the outlet of the filter 11 from which the ascites flows out, and the liquid passage port 12a of the concentrator 12 is the inlet of the concentrator 12 into which the ascites flows.

The second liquid feeding line 15 is provided with, for example, a second valve 50, a first pump 51, and a drip chamber 52 in this order from the upstream side to the downstream side. The second valve 50 opens and closes the second liquid feeding line 15. The first pump 51 is a tube pump that handles and feeds the tube of the second liquid feeding line 15. Since the first pump 51 closes the tube when stopped, it also functions as a closing means.

A gas introduction unit 53 for introducing a gas into the second liquid feeding line 15 is connected to the second liquid feeding line 15. The gas introduction unit 53 is, for example, an atmosphere opening unit, and can introduce the atmosphere as a gas into the second liquid feeding line 15 through the line 54 connected to the drip chamber 52. That is, the drip chamber 52 is the gas introduction position in the second liquid feeding line 15, and the gas introduction position is located on the downstream side of the first pump 51.

The third liquid feeding line 16 connects the concentrator 12 and the concentrated ascites bag 13. The upstream end of the third liquid feed line 16 is connected to the liquid passage port 12b at the lower end of the concentrator 12, and the downstream end of the third liquid feed line 16 is connected to the concentrated ascites bag 13. It is connected. That is, the liquid passage port 12b of the concentrator 12 is an outlet of the concentrator 12 from which ascites flows out.

The third liquid feeding line 16 is provided with a second pump 60. The second pump 60 is a tube pump that handles and feeds the tube of the second liquid feeding line 15. Since the second pump 60 closes the tube when stopped, it also functions as a closing means.

The upstream end of the fourth liquid feeding line 17 is connected to, for example, the liquid passing ports 12c and 12d of the concentrator 12. That is, the liquid passage ports 12c and 12d of the concentrator 12 are outlets of the concentrator 12 through which the drainage flows out. The upstream end of the fourth liquid feeding line 17 may be connected to only one of the liquid passing ports 12c and 12d. The downstream end of the fourth liquid feeding line 17 is connected to a waste liquid portion (not shown) that houses the drainage liquid removed from the ascites by the concentrator 12. The fourth liquid feeding line 17 is provided with a check valve 65 as a check valve for preventing backflow to the concentrator 12 in the fourth liquid feeding line 17.

The fifth liquid feeding line 18 connects the concentrated ascites bag 13 and the first liquid feeding line 14. One end (upstream end) of the fifth liquid feeding line 18 is connected to the concentrated ascites bag 13. The other end (downstream end) of the fifth liquid feed line 18 is connected to the confluence position between the second valve 50 and the first pump 51 in the second liquid feed line 15. .. The fifth liquid feeding line 18 is provided with a third valve 70 that opens and closes the fifth liquid feeding line 18.

For example, a soft tube is used for the first to sixth liquid feeding lines 14 to 19.

The control unit 20 is a computer having, for example, a CPU, a memory, and the like. The control unit 20 controls the operation of each device such as the first pump 51, the second pump 60, the first valve 41, the second valve 50, and the third valve 70 to execute the ascites treatment. Can be done. The control unit 20 can realize ascites processing by, for example, executing a program stored in the memory on the CPU.

For example, the control unit 20 stops the first pump 51, operates the second pump 60, introduces gas from the gas introduction unit 53 into the second liquid feed line 15, and causes the second liquid feed line 15. The recovery step of collecting the ascites downstream from the gas introduction position in the concentrated ascites bag 13 can be executed.

Next, the ascites treatment performed by using the above-mentioned ascites treatment system 1 will be described.

First, as shown in FIG. 1, an ascites bag 10 containing ascites collected from a patient is connected to a first liquid feeding line 14. Next, the third valve 70 is closed, the first valve 41 and the second valve 50 are opened, the first pump 51 and the second pump 60 are operated, and the ascites filtration / concentration process is started. Will be done. At this time, the set flow rate Q1 of the first pump 51 is set to be larger than the set flow rate Q2 of the second pump 60.

The ascites of the ascites bag 10 is sent to the filter 11 through the first liquid feeding line 14. The ascites flows into the space 30a on the primary side of the filtration membrane 30 from the liquid passage port 11a of the filter 11, passes through the filtration membrane 30, and flows out to the space 30b on the secondary side of the filtration membrane 30. At this time, the predetermined causative substance is removed from the ascites. The drainage liquid that does not pass through the filtration membrane 30 in the space 30a on the primary side of the filtration membrane 30 is discharged to a waste liquid portion (not shown) through the sixth liquid feeding line 19.

The ascites that has flowed out into the space 30b on the secondary side of the filter membrane 30 flows out from the liquid passage port 11d of the filter 11 to the second liquid feeding line 15, and passes through the second liquid feeding line 15 to the concentrator 12. Sent. At this time, since the second liquid feeding line 15 has a positive pressure with respect to the atmosphere, the atmosphere is not introduced from the gas introduction unit 53. The ascites flows into the space 40a on the primary side of the concentrating membrane 40 from the inlet (liquid passing port 12a) of the concentrator 12, and is discharged from the outlet (liquid passing port 12b). At this time, since the set flow rate Q1 of the first pump 51 is larger than the set flow rate Q2 of the second pump 60, a part of the ascites water passes through the concentrated film 40 and is on the secondary side of the concentrated film 40. It flows out into the space 40b of. As a result, water is mainly removed from the ascites and the ascites is concentrated. The concentrated ascites concentrated by the concentrator 12 is stored in the concentrated ascites bag 13 through the third liquid feeding line 16. The drainage removed by the concentrator 12 is discharged to a waste liquid portion (not shown) through the fourth liquid feeding line 17.

For example, when a predetermined time has passed since the filtration / concentration process was started and the ascites of the ascites bag 10 is exhausted, for example, the second valve 50 is closed and the third valve 70 is opened as shown in FIG. Will be done. Subsequently, the first pump 51 and the second pump 60 are operated, the concentrated ascites of the concentrated ascites bag 13 is supplied to the second liquid feeding line 15 through the fifth liquid feeding line 18, and the second feeding line 15 is supplied. It is supplied to the concentrator 12 through the liquid line 15 and reconcentrated in the concentrator 12. The concentrated ascites is then returned to the concentrated ascites bag 13 through the third liquid feeding line 16. After performing the reconcentration treatment of the concentrated ascites for a predetermined time, the first pump 51 and the second pump 60 are stopped, and a series of filtration / concentration treatments are completed.

Next, a recovery step of collecting the ascites remaining in the second liquid feeding line 15, the concentrator 12, and the third liquid feeding line 16 of the ascites treatment system 1 is performed. For example, as shown in FIG. 3, with the first pump 51 stopped, the second pump 60 operates, the atmosphere is sucked from the gas introduction unit 53, and the air is introduced into the second liquid feeding line 15. As a result, ascites downstream from the gas introduction position of the second liquid supply line 15, that is, the section between the gas introduction position and the concentrator 12 in the second liquid supply line 15, the primary side of the concentrator 12. The ascites remaining in the space 40a and the third liquid feeding line 16 is pushed by the atmosphere and collected in the concentrated ascites bag 13. At this time, in the concentrator 12, the ascites in the space 40a on the primary side passes through without being removed by the concentrating membrane 40. Further, in the fourth liquid feeding line 17, the check valve 65 prevents the drainage from flowing back to the concentrator 12. The set flow rate of the second pump 60 may be changed from the set flow rate at the time of filtration / concentration processing and may be larger than that.

After that, when the air introduced into the second liquid feeding line 15 reaches, for example, the concentrated ascites bag 13, the second pump 60 is stopped, and the residual ascites recovery step is completed.

According to the present embodiment, the ascites treatment system 1 has a gas introduction unit 53 capable of introducing a gas into a gas introduction position provided in a second liquid feeding line 15 downstream of the first pump 51, and a second unit. Since the check valve 65 provided in the liquid feeding line 17 of No. 4 is provided, the second pump 60 is operated, and the gas is sucked to the downstream side of the first pump 51 of the second liquid feeding line 15. Therefore, the remaining ascites in the line can be collected in the concentrated ascites bag 13. At this time, in the concentrator 12, there is no difference in flow rate between the inlet 12a and the outlet 12b, only the ascites passes through, and the ascites is not concentrated. Therefore, the pressure of the concentrator 12 increases when the residual ascites is collected. Can be suppressed. As a result, it is possible to prevent the ascites treatment system 1 from stopping due to an increase in the pressure of the concentrator 12 during the recovery of the residual ascites.

In the above embodiment, the control unit 20 operates the first pump 51 and the second pump 60 before the residual ascites recovery step, and sends the filtered ascites in the filter 11 to the second pump. The pre-process of moving the liquid line 15 to the downstream side from the gas introduction position may be executed.

In this case, before the recovery step, for example, the first valve 41 and the third valve 70 are closed, the second valve 50 is opened, and the first pump 51 and the second valve 70 are opened, as shown in FIG. The pump 60 operates. As a result, the atmosphere is sucked from the gas introduction unit 46, introduced into the filter 11, and the filtered ascites in the space 30b on the secondary side of the filter 11 is pushed by the atmosphere, and the second liquid feeding line 15 is used. Move to the downstream side of. At this time, a part of the ascites of the third liquid feeding line 16 is collected in the concentrated ascites bag 13. Then, for example, when the ascites remaining in the filter 11 moves downstream from the gas introduction position of the second liquid feeding line 15, the first pump 51 stops. As for the timing at which the first pump 51 is stopped, the predetermined time until the ascites of the filter 11 moves downstream from the gas introduction position is known in advance, and the first pump 51 is operated for the predetermined time. Alternatively, a gas detection sensor may be provided near the gas introduction position of the second liquid feeding line 15 so that the first pump 51 stops when the gas detection sensor detects a gas. May be good.

Then, after the previous step is completed, the second pump 60 operates in a state where the first pump 51 is stopped as shown in FIG. 3 described above, and the gas introduction unit 53 to the second liquid feeding line 15 The atmosphere is introduced into the ascites, and the ascites located downstream of the gas introduction position is collected in the concentrated ascites bag 13. According to this example, more residual ascites can be collected in the concentrated ascites bag 13.

Further, in the above embodiment, after the residual ascites recovery step, the control unit 20 stops the second pump 60, operates the first pump 51 in the reverse direction at the time of processing, and from the gas introduction unit 53. A post-step may be performed in which a gas is introduced and the ascites in the fifth liquid feeding line 18 is collected in the concentrated ascites bag 13.

In this case, after the recovery step, for example, the third valve 70 is opened, the second valve 50 is closed, the second pump 60 is stopped, and the first pump 51 processes, as shown in FIG. It operates in the opposite direction (upstream direction) of time. As a result, the atmosphere is introduced from the gas introduction unit 53 to the second liquid feeding line 15. Then, the ascites remaining in the fifth liquid feeding line 18 is pushed by the atmosphere and collected in the concentrated ascites bag 13. According to this example, ascites remaining in the fifth liquid feeding line 18 can also be recovered by using the introduction of gas from the gas introduction unit 53. When the post-process is performed, the pre-process may also be performed. That is, the pre-process, the recovery process, and the post-process may be performed in this order.

The configuration of the ascites treatment system 1 is not limited to that of the above embodiment.

For example, as shown in FIG. 6, the first pump 51 may be in the first liquid feeding line 14. In this case, when the residual ascites recovery step is performed, for example, the second pump 60 operates with the first pump 51 stopped and the second valve 50 and the third valve 70 closed. , The atmosphere is sucked into the second liquid feeding line 15 from the gas introduction unit 53 and introduced. As a result, ascites downstream from the gas introduction position of the second liquid supply line 15, that is, the section between the gas introduction position and the concentrator 12 in the second liquid supply line 15, the primary side of the concentrator 12. The ascites remaining in the space 40a and the third liquid feeding line 16 is pushed by the atmosphere and collected in the concentrated ascites bag 13.

Further, in this case, the gas introduction position of the gas introduction unit 53 may be on the upstream side of the confluence position of the fifth liquid supply line 18 in the second liquid supply line 15.

When the first pump 51 is located in the first liquid feeding line 14, the gas introduction position of the gas introduction unit 53 may be provided in the filter 11 as shown in FIG. 7. In this case, the gas introduction position of the gas introduction unit 53 may be the liquid passage port 11c leading to the space 30b on the secondary side of the filtration membrane 30 of the filter 11. In this case, when performing the residual ascites recovery step, for example, the second pump 60 is in a state where the first pump 51 is stopped, the third valve 70 is closed, and the second valve 50 is opened. Is activated, and the atmosphere is sucked from the gas introduction unit 53 into the space 30b on the secondary side of the filter 11 through the liquid passage port 11c and introduced. As a result, the space 30b on the secondary side of the filter 11 and the ascites on the downstream side thereof, that is, the space 30b on the secondary side of the filter 11, the second liquid feeding line 15, and the space on the primary side of the concentrator 12. The ascites remaining in 40a and the third liquid feeding line 16 is pushed by the atmosphere and collected in the concentrated ascites bag 13.

The ascites treatment system 1 in the above embodiment may not be provided with the fifth liquid feeding line 18 and may not be reconcentrated. The check valve portion provided in the fourth liquid feeding line 17 is not limited to the check valve 65, and may be another device as long as it can prevent the backflow to the concentrator 12.

In the above embodiment, the first liquid feed line 14 and the sixth liquid feed line 19 are connected to the inner region of the filter membrane 30 of the filter 11, and the second liquid feed line 15 is the outer side of the filter membrane 30. It was connected to the region, but vice versa, that is, the first liquid feed line 14 and the sixth liquid feed line 19 were connected to the outer region of the filter membrane 30 of the filter 11, and the second liquid feed line 15 was connected. It may be connected to the inner region of the filter membrane 30. Further, the second liquid feeding line 15 and the third liquid feeding line 16 are connected to the inner region of the concentrating membrane 40 of the concentrator 12, and the fourth liquid feeding line 17 is connected to the outer region of the concentrating membrane 40 of the concentrator 12. It was connected, but vice versa, that is, the second liquid feeding line 15 and the third liquid feeding line 16 were connected to the outer region of the concentrating membrane 40 of the concentrator 12, and the fourth liquid feeding line 17 was connected to the concentrator. It may be connected to the inner region of the concentrated film 40 of 12. Further, the filter 11 and the concentrator 12 may be installed upside down. That is, the filter 11 may be installed so that the inlet 11a is at the bottom and the outlet 11b is at the top, and the concentrator 12 is installed so that the inlet 12a is at the bottom and the outlet 12b is at the top.

The above embodiment is an example in which the present invention is applied to the ascites treatment system 1 for treating ascites, but the present invention can also be applied to a body cavity fluid treatment system for treating other body cavity fluids such as pleural effusion. ..

INDUSTRIAL APPLICABILITY The present invention is useful in suppressing an increase in the pressure of the concentrator when collecting the body cavity liquid remaining in the line in the body cavity liquid treatment system.

1 Stomach water treatment system 10 Stomach water bag 11 Filter 12 Concentrator 13 Concentrated stool water bag 14 First liquid feeding line 15 Second liquid feeding line 16 Third liquid feeding line 17 Fourth liquid feeding line 18 Fifth feeding Liquid line 19 6th liquid supply line 20 Control unit 40 Concentrating membrane 51 1st pump 53 Gas introduction unit 60 2nd pump 65 Check valve

Claims (7)

It is a body cavity fluid treatment system that processes body cavity fluid.
A containment unit for accommodating body cavity fluid and
With a filter,
Concentrator and
The collection part where the body cavity fluid is collected, and
A first liquid feeding line that feeds the body cavity liquid of the accommodating portion to the filter, and
A second liquid feeding line that feeds the body cavity liquid filtered by the filter to the concentrator, and
A third liquid feeding line that feeds the body cavity liquid concentrated by the concentrator to the collecting unit, and
A fourth liquid feeding line that discharges the drainage removed by the concentrator, and
With the first pump provided in the first liquid feeding line or the second liquid feeding line,
The second pump provided in the third liquid feeding line and
A gas introduction unit capable of introducing a gas to a gas introduction position provided in a second liquid feeding line or a filter downstream of the first pump.
A body cavity liquid treatment system provided in the fourth liquid feeding line and comprising a backflow prevention unit for preventing backflow to the concentrator. A recovery step is executed in which the first pump is stopped, the second pump is operated, gas is introduced from the gas introduction section, and the body cavity liquid located downstream of the gas introduction position is recovered in the recovery section. The body cavity fluid treatment system according to claim 1, further comprising a control unit. Prior to the recovery step, the control unit operates the first pump and the second pump to bring the filtered body cavity liquid in the filter into the gas introduction position in the second liquid feeding line. The body cavity fluid treatment system according to claim 2, wherein the pre-process for moving to the downstream side is executed. The first pump is provided in the second liquid feeding line.
The body cavity liquid treatment system further includes a fifth liquid feeding line that feeds the body cavity liquid of the collecting portion to a confluence position on the upstream side of the first pump in the second liquid feeding line.
After the recovery step, the control unit stops the second pump, operates the first pump in the reverse direction at the time of processing, introduces a gas from the gas introduction unit, and causes the fifth The body cavity liquid treatment system according to claim 3, wherein a post-process of collecting the body cavity liquid in the liquid feeding line to the collection unit is executed. It is a method of using a body cavity fluid treatment system that treats body cavity fluid.
A containment unit for accommodating body cavity fluid and
With a filter,
Concentrator and
The collection part where the body cavity fluid is collected, and
A first liquid feeding line that feeds the body cavity liquid of the accommodating portion to the filter, and
A second liquid feeding line that feeds the body cavity liquid filtered by the filter to the concentrator, and
A third liquid feeding line that feeds the body cavity liquid concentrated by the concentrator to the collecting unit, and
A fourth liquid feeding line that discharges the drainage removed by the concentrator, and
With the first pump provided in the first liquid feeding line or the second liquid feeding line,
The second pump provided in the third liquid feeding line and
A gas introduction unit capable of introducing gas to a gas introduction position provided in a second liquid feeding line or a filter downstream of the first pump,
Using a coelomic fluid treatment system provided in the fourth liquid feeding line and comprising a backflow prevention unit for preventing backflow to the concentrator.
A recovery step of stopping the first pump, operating the second pump, introducing gas from the gas introduction section, and recovering the body cavity liquid downstream from the gas introduction position to the recovery section. How to use the coelomic fluid treatment system to perform. Prior to the recovery step, the first pump and the second pump are operated to move the filtered body cavity liquid in the filter downstream from the gas introduction position in the second liquid feeding line. The method of using the body cavity fluid treatment system according to claim 5, wherein the pre-process for causing the pump to be performed. The first pump is provided in the second liquid feeding line.
The body cavity liquid treatment system further includes a fifth liquid feeding line that feeds the body cavity liquid of the collecting portion to a confluence position on the upstream side of the first pump in the second liquid feeding line.
After the recovery step, the second pump is stopped, the first pump is operated in the reverse direction at the time of processing, gas is introduced from the gas introduction unit, and the gas is introduced into the fifth liquid feeding line. The method of using the body cavity fluid treatment system according to claim 6, wherein the post-step of collecting the body cavity fluid in the collection unit is performed.

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