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Therapeutic solution preparation device and blood processing system

A technology for making devices and blood processing, applied in dialysis systems, other medical devices, suction devices, etc., can solve the problems of high cost burden and expensive infusion bags, and achieve the effect of improving measurement accuracy

Active Publication Date: 2019-08-09
ASAHI KASEI MEDICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to process blood continuously for a long time in the blood treatment device, medical staff need to replace the infusion bag several times during treatment, which becomes a burden for medical staff
In addition, the infusion bag in which the treatment solution is sealed is expensive, so it is also a heavy burden in terms of cost.

Method used

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  • Therapeutic solution preparation device and blood processing system
  • Therapeutic solution preparation device and blood processing system
  • Therapeutic solution preparation device and blood processing system

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0032] figure 1 It is an explanatory diagram showing an outline of the configuration of the blood treatment system 1 including the treatment solution preparation device according to the present embodiment. The blood treatment system 1 is, for example, a system for performing continuous slow blood treatment. The blood treatment system 1 includes, for example: a blood treatment device 10 for performing blood treatment on a patient; a treatment solution supply device 11 for supplying a treatment solution such as supplementary dialysate and replenishment solution to the blood treatment device 10; and a control device 12 .

[0033] The blood treatment apparatus 10 has a blood treatment circuit 21 that supplies blood of a patient to a blood purifier 20 and returns the blood to the patient. The blood treatment circuit 21 has a blood supply circuit 22 for supplying the patient's blood to the blood purifier 20 , and a blood return circuit 23 for returning the blood from the blood pu...

no. 2 approach

[0064] In the first embodiment described above, the measurement accuracy of the concentration measuring device 71 was improved by calibrating the temperature sensor 121 , but the measurement accuracy of the concentration measuring device 71 may be improved by calibrating the conductivity sensor 120 .

[0065] In the above case, the correction unit 73 uses the electrolyte solution supply unit 72 to make the electrolyte solution with a known concentration flow in the mixing circuit 70, and uses the temperature sensor 121 to measure the temperature of the electrolyte solution, based on the measured temperature and the known temperature of the electrolyte solution The conductivity sensor 120 is calibrated according to the correlation between temperature and conductivity.

[0066] Specifically, in the preparatory stage before the start of blood treatment, first, in the treatment solution preparation device 60, the electrolyte solution supply unit 72 is used to supply the mixed solut...

no. 3 approach

[0075] Then, the ratio of the concentration of the mixed solution to the concentration of the electrolytic solution (ionic solution) is almost constant with the ratio of the conductivity of the mixed solution to the conductivity of the electrolytic solution within a certain temperature and concentration range using the following formula (3). A third embodiment in which the concentration of the mixed solution to be measured by the concentration measuring device 71 is calculated in one situation will be described.

[0076] (Conductivity of electrolyte) / (Conductivity of mixed solution)=α·(Concentration of electrolyte) / (Concentration of mixed solution), (α is a constant)...(Formula 3)

[0077] In the above case, the treatment solution production device 60 is, for example, Figure 5 As shown, it is equipped with: a mixing circuit 70 and a concentration measuring device 71 similar to those of the above-mentioned embodiment; an electrolytic solution supply unit 140 for changing the t...

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Abstract

The purpose of the present application is to improve the measurement accuracy of the concentration measuring device of the treatment solution preparation device without increasing the burden on the medical personnel in the preparation stage of continuous slow treatment and without adding additional functions to the sensor. In one aspect of the invention of the present application, the treatment liquid production device (60) has: a mixing circuit (70), which is used to mix a plurality of stock solutions; a concentration measuring device (71), which is based on the conductivity sensor (120) and temperature The conductivity and temperature measured by the sensor (121) are used to measure the concentration of the mixed solution; the electrolyte supply unit (72), which makes the electrolyte with a known concentration flow in the mixing circuit (70); and the calibration unit (73) , which uses the electrolyte supply unit (72) to make the electrolyte with known concentration flow in the mixing circuit (70), and uses the conductivity sensor (120) to measure the conductivity of the electrolyte, based on the measured conductivity and the electrolysis The difference between the known conductivity of the liquid and the temperature sensor (121) is calibrated based on the correlation between temperature and conductivity.

Description

technical field [0001] The invention relates to a treatment liquid production device and a blood treatment system. Background technique [0002] For example, as one of the treatment methods for seriously ill patients such as acute renal failure, there is continuous slow blood therapy in which blood is continuously purified by extracorporeal circulation. This type of treatment is generally performed in a blood treatment device, which has a blood circuit that supplies the patient's blood to a blood purifier and returns it to the patient after purification, and supplies the blood treatment circuit with the treatment liquid used in the blood circuit. Treatment fluid supply circuit. The treatment fluid includes a supplement fluid supplied to the blood of the blood treatment circuit to maintain the patient's body fluid balance, and a dialysate supplied to the blood purifier to remove metabolites from the patient's blood. [0003] In addition, in general, in continuous gradual bl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61M1/14
CPCA61M1/14A61M2205/3317A61M2205/3368A61M1/1607A61M1/1617A61M1/1664
Inventor 海本隆志土屋瑞穗
Owner ASAHI KASEI MEDICAL CO LTD