13 through a derivation unit consisting of a capacitor 11 and a resistor 12 timer 13 which is also type 555 is connected within the circuit of the monostable multivibrator the width of the pulse of its output is determined by a capacitor 14 and a resistor 15 advantageously such width is a constant 100 microseconds a transistor 16 is rendered conductive by pulses from the output of the timer 13 connected in series with the collector of the transistor 16 is a potentiometer 17 one end of the winding of the potentiometer being connected to main wire 18 whereas the emitter of the transistor 16 is connected to the other main wire 19 of the generator the sliding contact of the potentiometer 17 is connected e g to the electrode 2 and the other output of the potentiometer 17 is connected to the electrode 1 through the earphone 3 and the current measuring instrument 4 in the above described arrangement the stimulator for dialysis operates with rectangular electrical pulses having frequencies in the range of 250 hz to 5 khz such frequency being continuously adjustable by means of a variable resistor 10 the amplitude of the electrical pulses applied to the electrodes 1 and 2 is adjustable in the range of 0 to 17v by means of the potentiometer 17 the battery 6 has an output of 18v the current measurement range of the measuring instrument 4 is 0 to 300 ua the velocity of its hand motion indicates the time derivative equ2 the earphone 3 is preferably of an electromagnetic type referring generally to fig5.