JPS62145633U - - Google Patents

Description

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of this invention, together with an artificial kidney device. FIG. 2 is a diagram showing the TMP rise characteristics of the embodiment shown in FIG.
Figure 3 is an operation flowchart for measuring and storing the throttling characteristics of the throttle section in the embodiment shown in Figure 1, and Figure 4 is an operation flowchart for measuring and storing the throttling characteristics of the throttle section in the embodiment shown in Figure 1. (Number of drive pulses to be applied)
FIG. 5 is an operation flowchart showing the startup operation immediately after the start of dialysis in the embodiment of FIG. 1, FIG. 6 is an operation flowchart showing the operation of the embodiment of FIG. The figure shows the TMP versus time characteristic at steady state in the embodiment of Fig. 1, Fig. 8 shows the outline of the constriction section of the embodiment of Fig. 1, and Fig. 9 shows the blood circuit side of the artificial kidney device. A diagram showing ripple fluctuations in pressure, FIG. 10 is a block diagram of a conventional artificial kidney device, FIG. 11 is a diagram showing TMP rise characteristics of the conventional device of FIG. 10, and FIG. 12 is a diagram of the conventional device of FIG. 10. FIG. 13 is a diagram showing the outline of the aperture section, and FIG. 13 is a diagram showing the variation in aperture characteristics when the tube of the aperture section is replaced. 1, 7: Blood tube, 2: Blood pump, 3,
5: drip chamber, 4: dialyzer, 6: throttle section, 8: dialysate supply section, 9, 10: flow path, 11, 1
2: Pressure sensor, 13: Control unit, 30: CPU,
31: ROM, 32: RAM, 33: AD converter, 34: input/output circuit, 35: drive circuit, 36: position detection circuit, 37: timer.

Claims (1)

[Scope of Claim for Utility Model Registration] Blood circuit side pressure is measured by a blood circuit side pressure measuring means, dialysis circuit side pressure is measured by a dialysis circuit side pressure measuring means, and these measured blood circuit side pressure and dialysis circuit side pressure The blood pressure of the artificial kidney device is calculated by calculating the differential pressure TMP between the calculated value and the control set value, and controlling the constriction section provided in the venous line in the blood circuit according to the deviation between the calculated value and the control set value, so that the deviation becomes smaller. In the circuit pressure control device, a throttling characteristic measuring means for measuring the relationship between the degree of throttling of the throttling portion and the blood circuit side pressure, a throttling characteristic storage means for storing the measured throttling characteristic, and a throttling characteristic storage means for storing the measured throttling characteristic; throttling part control means for generating a control signal for the throttling part so as to reduce the deviation based on the memorized throttling characteristic; and averaging means for calculating the average value of the differential pressure TMP; and at the time of starting dialysis. , an intermediate set value lower than the final set value is used as the control set value, and the differential pressure T between this and the above
a first deviation calculating means which calculates the difference between the average value of MP and the deviation; and after the differential pressure TMP is almost stabilized at the intermediate setting value, the final setting value is set as the control setting value; a second deviation calculation means that calculates the difference between the final setting value and the average value of the differential pressure TMP to obtain the deviation; A blood circuit pressure control device for an artificial kidney device, comprising third deviation calculation means for calculating the difference between the final setting value and the final setting value to obtain the deviation.