Transcutaneous nerve stimulator device and method

Details Transcutaneous nerve stimulator device and method Transcutaneous nerve stimulator device and method

1975-05-27

1977-03-29

Michell, Robert W.

Surgery

Truss

Pad

A61N 136

Patent

active

040143473

ABSTRACT:
A transcutaneous nerve stimulator as disclosed that is useful for suppression of organic pain. The stimulator device is relatively small in overall dimensions and is therefore portable yet provides a rectangular waveform with the output signal produced being sufficient to drive a capacitive resistance load of at least 2.2K ohms in parallel with 0.1Mfd with a maximum rise and fall time of 12 microseconds. The device is powered by a pair of NI-CD batteries providing a 2.5 volt input and produces a maximum 80 volt peak pulse output having a maximum duration of .10 milliseconds at a pulse rate between 20pps and 180pps. Potentiometers are provided to vary the pulse rate, the duty cycle, and output pulse amplitude as is necessary or desirable for a particular patient. The device includes an oscillator that controls the pulse rate of the output from a variable one-shot multivibrator with the output pulses from the multivibrator being coupled through a power amplifier to the primary winding of a step-up transformer, the secondary winding of which transformer is connected through a voltage clamp and variable I.E. mode circuit to the output leads from the device. The disclosed method includes generating a rectangular waveform and producing an output that is sufficient to drive a capacitive resistance load of at least 2.2K ohms in parallel with 0.1Mfd with a maximum rise and fall time of 12 microseconds.

REFERENCES:
patent: 3373747 (1968-03-01), Tapper
patent: 3521641 (1970-07-01), Farensbach
patent: 3791373 (1974-02-01), Winkler et al.
patent: 3881494 (1975-05-01), Paul, Jr.
patent: 3897789 (1975-08-01), Blanchard
patent: 3902502 (1975-09-01), Liss et al.
patent: 3911930 (1975-10-01), Hagfors et al.
patent: 3946745 (1976-03-01), Lai et al.

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