Dialysis-fluid supply system

Patent metadata

Field	Value
Publication number	US-10814055-B2
Application number	US-201515524495-A
Country	US
Kind code	B2
Filing date	Nov 12, 2015
Priority date	Nov 20, 2014
Publication date	Oct 27, 2020
Grant date	Oct 27, 2020

Abstract

This dialysis-fluid supply system, which mixes a diluent and at least two drugs to generate a dialysis fluid, and outputs said dialysis fluid, is provided with: two tanks which mix the drugs and the diluent to generate the dialysis fluid, and store said dialysis fluid; a water supply device and a drug supply device which supply the diluent and the drugs to each of the tanks; mechanisms for outputting, to a dialysis device, the dialysis fluid stored in each of the tanks; and a control unit for controlling the driving of these. During output of the dialysis fluid from at least one of the tanks, the control unit sequentially switches the supply destination tank for the drugs and the diluent, and the dialysis-fluid output source tank, between the two tanks in order to generate the dialysis fluid in the other tank.

First claim

The invention claimed is:

1. A personal dialysis-fluid supply system for use in a medical treatment of one patient that generates dialysis fluid by mixing a diluent and at least two drugs, and outputs the dialysis fluid, the system comprising:
at least two tanks that each generate dialysis fluid by mixing the at least two drugs and the diluent, the at least two tanks storing the mixed dialysis fluid, each of the at least two drugs being in powder form and individually packaged in an amount necessary for a single generation of the dialysis fluid, prior to use;
a supply mechanism that supplies the at least two drugs and the diluent to each of the at least two tanks, the supply mechanism including a drug supply device including a holder configured to hold the at least two drugs and at least two nozzles configured to supply each of the at least two drugs through connection lines to the at least two tanks, the drug supply device being configured to supply all of the at least two drugs that are individually packaged and assigned to a first tank of the at least two tanks to which the drugs and the diluent are supplied, without measuring the at least two drugs;
a first input valve and a second input valve respectively disposed in the connection lines between the drug supply device and each of the at least two tanks, the first input valve and the second input valve being configured to respectively control the supply of the at least two drugs from the drug supply device to a corresponding tank of the at least two tanks without a measurement pump;
an output mechanism that outputs the dialysis fluid stored in each of the at least two tanks through a single main output line to a dialysis device; and
a control unit configured to:
control the first input valve and the second input valve to supply a predetermined amount of each of the at least two drugs from the drug supply device to each of the at least two tanks,
control the output mechanism to output the dialysis fluid from at least one of the at least two tanks to the single main output line, and
alternately switch between each of the at least two tanks in turn by controlling the supply mechanism to stop supply of the drugs and the diluent to the first tank of the at least two tanks to which the drugs and the diluent are supplied and start supply of the drugs and the diluent to a second tank of the at least two tanks from which the dialysis fluid is output by the output mechanism, while controlling the output mechanism to stop outputting the dialysis fluid from the second tank and start outputting the dialysis fluid from the first tank of the at least two tanks.

2. The dialysis-fluid supply system according to claim 1 , wherein:
each tank includes at least a weight sensor that measures a weight of supplied fluid, or a level sensor that measures a level of supplied fluid, and
the control unit is configured to control the supply mechanism based on a result of detection by the weight sensor or the level sensor.

3. The dialysis-fluid supply system according to claim 1 , further comprising a circulation mechanism that internally and externally circulates fluid inside the at least two tanks to perform agitation.

4. The dialysis-fluid supply system according to claim 1 , further comprising a return line that returns, to the supply mechanism, fluid output from the first tank, wherein
the control unit is configured to execute a cleaning process of supplying cleaning fluid into each tank to clean the respective tank, and supply the cleaning fluid supplied to and discharged from at least one of the tanks, as cleaning fluid to another tank through the return line.

5. The dialysis-fluid supply system according to claim 1 , wherein, upon switching from the first tank to the second tank, the control unit is configured to control at least one output valve to discharge the dialysis fluid remaining in the first tank and any line coupled with the first tank.

6. The dialysis-fluid supply system according to claim 1 , wherein:
the control unit is configured to control the drug supply device to switch the supply of the at least two drugs between the first tank and the second tank such that the drug supply device is configured to supply the at least two drugs to either tank.

7. The dialysis-fluid supply system according to claim 1 , wherein:
the output mechanism is configured to output an amount of dialysis fluid generated in a single generation process in each tank equal to or greater than B×A and equal to or smaller than C×A, based on (i) a flow rate of the dialysis fluid used is A L/min, (ii) a time duration necessary for the generation process is B min, and (iii) a use limit time duration of the dialysis fluid is C min.

8. The dialysis-fluid supply system according to claim 1 , wherein:
the output mechanism is configured to output the dialysis fluid stored in each of the at least two tanks directly to a single dialysis device and not through a storage tank; and
the control unit is configured to switch between the first tank to which the drugs and the diluent are supplied and the second tank from which the dialysis fluid is output, after completion of generation of the dialysis fluid in the first tank to which the drugs and the diluent are supplied while a small amount of the dialysis fluid generated in a previous generation process remains in the second tank from which the dialysis fluid is output, to allow the dialysis fluid to be output continuously.

9. The dialysis-fluid supply system according to claim 1 , wherein the supply mechanism includes:
a turntable configured to retain the at least two drugs; and
an upstream nozzle and a downstream nozzle of the at least two nozzles disposed around a periphery of the turntable, the upstream nozzle and the downstream nozzle being configured to contact and separate from individual packages of the at least two drugs retained by the turntable and cause the at least two drugs to be supplied to the a respective one of the at least two tanks, the downstream nozzle being coupled to a single main input line.

10. A personal dialysis-fluid supply method for use in a medical treatment of one patient that generates dialysis fluid by mixing a diluent and at least two drugs, and outputs the dialysis fluid, the method comprising:
generating dialysis fluid by mixing the at least two drugs and the diluent in one of at least two tanks, the at least two tanks storing the mixed dialysis fluid, each of the at least two drugs being in powder form and individually packaged in an amount necessary for a single generation of the dialysis fluid, prior to use;
supplying, by a supply mechanism, the at least two drugs and the diluent to each of the at least two tanks, the supply mechanism including a drug supply device including a holder configured to hold the at least two drugs and at least two nozzles configured to supply each of the at least two drugs through connection lines to the at least two tanks, the drug supply device being configured to supply all of the at least two drugs that are individually packaged and assigned to a first tank of the at least two tanks to which the drugs and the diluent are supplied, without measuring the at least two drugs;
controlling, by a first input valve and a second input valve, the supply of a predetermined amount of each of the at least two drugs from the drug supply device to a corresponding tank of the at least two tanks without a measurement pump, the first input valve and the second input valve being respectively disposed in the connection lines between the drug supply device and each of the at least two tanks;
outputting, by an output mechanism, the dialysis fluid stored in each of the at least two tanks through a single

Assignees

• Nikkiso Co Ltd

Inventors

• Fujiwara Masato
• Masuda Yoshimichi
• Nimura Hiroshi

Classifications

• A61M2205/3379

  Masses, volumes, levels of fluids in reservoirs, flow rates · CPC title

• A61M2209/10

  Equipment for cleaning · CPC title

• A61M2205/3382

  Upper level detectors · CPC title

• A61M2205/3386

  Low level detectors · CPC title

• A61K33/00

  Medicinal preparations containing inorganic active ingredients · CPC title