JPH0576445U - Artificial dialysis machine - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] To prevent hypotension during dialysis, control the water removal volume continuously and non-linearly, and easily set the pattern. Providing an artificial dialysis machine that is made possible. In an artificial dialysis device equipped with a means for setting a target water removal amount and a means 4 for setting a target dialysis time, a continuous change pattern of the water removal amount corresponding to a predetermined dialysis time is externalized. Means 5 for inputting from the device,
Storage means 6 for storing the input plurality of patterns
, And select and process the necessary ones from the pattern,
The water removal amount is continuously controlled 9 according to the selected pattern.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an artificial dialysis device equipped with a water removal control system that controls the amount of water removal continuously and accurately.

[0002]

[Prior Art]

 In recent years, with the progress of hemodialysis technology, it has become possible to perform dialysis in a short time by using a dialysis membrane with high water removal capacity. In addition, there is a problem of dialysis amyloidosis due to β2 microglobulin, and the demand for high water removal dialysis membrane is increasing more and more. Therefore, an artificial dialysis machine equipped with a water removal control device that can accurately control water removal is an essential dialysis instrument in order to fully exert the function of such a high water removal capacity dialysis membrane.

However, in the conventional artificial dialysis device, since the amount of water removed increases linearly with the dialysis time, the amount of easily dialyzable substances such as urea nitrogen component in blood is higher than that of other substances with the progress of dialysis. It decreases rapidly and the osmotic pressure in the blood progresses faster than in the cells.In the latter stage of dialysis, water transfer into the blood is suppressed, resulting in dialysis hypotension. There was a problem that the amount of water could not be reached.

Therefore, as a means for solving this problem, as shown in FIG. 5, the dialysis rate input section 24 is connected to the dialysis machine D by an external device which is connected to the control section 22 via the pattern storage section 26. By controlling the water removal system 21, a means for changing the water removal rate stepwise with respect to the dialysis time and setting several types of water removal rate at a predetermined dialysis time interval is used.

[0005]

[Problems to be solved by the device]

 However, in this system, in order to set the optimum pattern for each patient, the target amount of water removal and the water removal pattern must be considered and the pattern must be assembled by calculating the water removal rate at each time interval. However, since the optimal water removal pattern differs for each patient, and the target water removal amount is determined from the ideal weight of the patient and the weight difference before dialysis, the water removal amount changes with each dialysis. It had to be recalculated each time, and required a very laborious task.

For example, as shown in FIG. 6, the target water removal amount is 3 liters, the dialysis time is 5 hours, and 60% (1.8 liters) of the target water removal amount is set 2 hours after the start of dialysis. In order to achieve this, in a device in which the dialysis time interval is set in 5 steps, the water removal rate must be set in steps as shown in Fig. 7. Since the total area for 5 hours must be made to match the target water removal volume of 3 liters after making the area equal to the water removal volume of 1 and 8 liters, complicated calculations are required for setting the water removal rate at each stage. It required trial and error. Therefore, even if the patient's condition suddenly changes during dialysis and he / she wants to change the water removal pattern or the target water removal amount, there is a problem that it cannot be easily handled within a short time.

Further, in order to solve the above-mentioned problem of dialysis hypotension, it is necessary to synchronize the osmotic pressure change in blood due to the decrease of the urea nitrogen component with the control of the water removal amount. Since the decrease in water removal occurs non-linearly and continuously, the water removal pattern that was set to change the conventional water removal rate stepwise with the elapsed time of dialysis is not biocompatible and The development of hypotension in the later stages has not been resolved.

Therefore, in order to prevent hypotension during dialysis, the present invention controls the amount of water removal to be changed continuously and non-linearly, and the pattern can be easily set. It is an object of the present invention to provide an artificial dialysis device.

[0009]

[Means for Solving the Problems]

 In order to solve the problems of the present invention, the artificial dialysis device of the present invention is preliminarily determined in the artificial dialysis device including means for setting a target water removal amount and means for setting a target dialysis time. A means for inputting a continuous change pattern of the amount of water removal corresponding to a given dialysis time from an external device and a memory means for storing the plurality of input patterns are selected, and a necessary one is selected from the patterns. The amount of water removed is continuously controlled according to the selected pattern.

[0010]

[Action]

 According to the present invention, when determining the amount of water removal for dialysis, the change pattern of the amount of water removal corresponding to a predetermined time is input to the artificial dialysis device from an external device, and the pattern of patient conditions is input from that pattern. It is possible to select the most suitable water removal pattern.

In the conventional apparatus shown in FIG. 5, since the water removal rate is set with respect to the target water removal amount, the dialysis time interval is set stepwise and the water removal at each time interval is performed. The complicated procedure of assembling the pattern by calculating the speed must be followed, and if the water removal pattern is changed during the dialysis, the total amount of water removed will change, and the calculation will have to be recalculated each time. It required time-consuming work. On the other hand, according to this device, it is possible not only to immediately select a continuous non-linear change pattern of the water removal amount by the selection process from the storage means that stores a plurality of patterns, but also to When changing the water removal pattern on the way, the water removal rate can be calculated again without changing the dialysis time or the target water removal amount, and the continuous non-linear water removal amount can be immediately adjusted to the patient's body. The change pattern of can be calculated.

Further, according to the present apparatus, since it is possible to perform non-linear continuous water removal, it is possible to synchronize the osmotic pressure change in the blood due to the decrease in the urinary nitrogen component and the control of the water removal amount. It is possible to remove water without causing dialysis hypotension.

[0013]

【Example】

 Hereinafter, embodiments of the invention will be described with reference to the drawings.

FIG. 1 is a configuration diagram of an artificial dialysis device according to the present invention, FIG. 2 is a diagram showing a relationship between a dialysis time and a water removal amount of a water removal pattern, and FIG. 3 is an overall perspective view of a pattern input external device. 4 is a configuration diagram of an external device for pattern input.

In FIG. 1, as the water removal system 1, a publicly known one disclosed in JP-A-1-238870 can be used. According to this, the water removal amount from the dialysis membrane is measured in real time. Therefore, it is most suitable for continuous and non-linear change control of the water removal amount from the dialyzer D by connecting to the device of the present invention, but other water removal controllable devices are used. May be.

The water removal control device 9 according to the present invention is connected to an external device (not shown) that creates various water removal patterns via an external terminal 8, and the pattern signal is analyzed by the pattern signal processing unit 7. It is stored in the memory in the pattern storage unit 6. The water removal patterns according to a plurality of conditions are stored in this pattern storage unit 6, and the water removal pattern suitable for each patient is selected by the pattern selection input unit 5, and the water removal pattern selected here and the target are selected. The optimum water removal pattern is calculated by the control unit 2 from the target water removal amount input from the water removal amount input unit 3 and the water removal time input from the dialysis time input unit 4, and the water removal system 1 performs the removal. Control water removal according to the water pattern.

FIG. 2 shows examples of water removal patterns a, b, and c. From the pattern selection input unit 5, the pattern a read in advance by the external device is selected, and the target water removal amount (for example, 3 liters) of the patient is input from the target water removal amount input unit 3. Furthermore, when the optimum dialysis time (for example, 5 hours) for the patient is input from the dialysis time input unit 4, the control unit 2 calculates the optimum dialysis condition (FIG. 6) based on the given condition and controls it. I do.

In this example, the amount of water removed from the patient was increased in the initial stage of dialysis to reduce 60% (1.8 liters) of the target amount of water removed in 2 hours of dialysis, and the remaining 40% was reduced in the latter half of dialysis. Since water can be removed, it is possible to prevent a decrease in osmotic pressure due to a decrease in easily dialyzable substances (urea nitrogen component) in blood that occurs at the initial stage of dialysis, due to the effect of concentrating blood by removing water. Furthermore, since dialysis can be performed by gentle removal of water in the latter half of dialysis, it is effective in preventing the occurrence of dialysis hypotension. Also, depending on the patient's condition change during dialysis, the water removal pattern can be changed immediately by selecting an appropriate pattern from the pattern selection input section 5 for the patient, so the water removal rate can be recalculated. The patient's condition can be immediately adjusted without changing the dialysis time or the target amount of water removal.

FIG. 3 shows an external device for pattern input. By the liquid crystal display unit 10 and the touch sensor 11 stretched over the surface of the liquid crystal display unit, the water removal pattern can be easily and freely input by tracing the liquid crystal display unit with a thin stick. The input pattern is optimally approximated by the polynomial approximation method, and is connected to the artificial dialysis device according to the present invention and input.

FIG. 4 is a diagram showing a configuration of an external device for pattern input. Based on the input signal input from the touch sensor 11 and displayed by the liquid crystal display control unit 12, the calculation unit 14 performs polynomial approximation, and the control / calculation unit 14 outputs the artificial dialysis device according to the present invention. Since the standard for signal output is RS-232C, which is widely known, the pattern input device is not limited to the above-mentioned external device, and a key can be created by using a commercially available personal computer or the like and forming a dedicated program. It is also possible to input from, and it is also possible to read the pattern from the reader using an IC card or the like.

[0021]

[Effect of the device]

 As described above, according to the artificial dialysis device of the present invention, the change pattern of the water removal amount corresponding to the predetermined dialysis time is input from the external device, and the optimum pattern suitable for the patient condition is input from the pattern. By selecting the water removal pattern for each patient by the selection process, it is possible to save the trouble of calculating the continuous non-linear change pattern of the water removal amount for each patient, and to prevent the occurrence of dialysis hypotension and optimize it for each patient. It is easy and quick to perform dialysis with the water removal pattern.

[Brief description of drawings]

FIG. 1 is a block diagram of an artificial dialysis device according to the present invention.

FIG. 2 is a diagram showing a relationship between a dialysis time of a water removal pattern and a water removal amount.

FIG. 3 is an overall view of an external device for pattern input.

FIG. 4 is a configuration diagram of an external device for pattern input.

FIG. 5 is a configuration diagram of a conventional artificial dialysis device.

FIG. 6 is a diagram showing a relationship between a dialysis time of a water removal pattern and a water removal amount.

FIG. 7 is a diagram in which the water removal rate is set by setting the dialysis time interval in five stages in the water removal pattern shown in FIG. 6.

[Explanation of sign]

1 ... water removal system, 2 ... control unit, 3 ... dialysis time input unit,
4 ... Dialysis time input unit, 5 ... Pattern selection input unit, 6 ... Pattern storage unit, 7 ... Pattern signal processing unit, 8 ... External terminal, 9 ... Water removal control device.

Claims (1)

[Scope of utility model registration request] 1. An artificial dialysis device comprising means for setting a target water removal amount and means for setting a target dialysis time, wherein a continuous change pattern of the water removal amount corresponding to a predetermined dialysis time is displayed. A means for inputting from an external device and a storage means for storing a plurality of the inputted patterns, a necessary one is selected from the patterns, and the water removal amount is continuously controlled according to the selected pattern. An artificial dialysis machine characterized by.