Stimulation device
First Claim
1. A device for electrically stimulating living tissue comprising:
- pulse generator means for producing periodic electrical pulses, first control means for controlling the pulse width of said periodic electrical pulses, adjustable second control means for varying the intensity of said periodic electrical pulses, and means coupling said first and second control means to simultaneously adjust said first and second control means relative to each other whereby an adjustment of the first control means causes an adjustment of the second control means to change the intensity of the periodic electrical pulses as a function of a change of the width of said pulses wherein the amplitude of stimulation intensity decreases with an increase in pulse width and the amplitude of stimulation intensity increases with a decrease in pulse width, and means for carrying said pulses to tissue engaging electrodes.
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Accused Products
Abstract
A device operable to electrically stimulate living tissue, including body organs, muscles and nerves. The device can be applied to the surface of the body or implanted in the body. The device has an electrical circuit containing a pulse width control for variation of the stimulus intensity, pulse repetition rate, and on-time of the pulse to vary the pulse width. A variation in pulse width causes the stimulus variation of the stimulus intensity in a prescribed mathematical manner so as to approximately follow the curves of the strength-duration pulse stimulus amplitude versus pulse width. This provides for an optimal selection among the various classes of stimulated nerve fibers within a nerve tract or bundle. A precise adjustment of stimulation can be achieved so as to optimize sensation of pain relief.
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Citations
23 Claims
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1. A device for electrically stimulating living tissue comprising:
- pulse generator means for producing periodic electrical pulses, first control means for controlling the pulse width of said periodic electrical pulses, adjustable second control means for varying the intensity of said periodic electrical pulses, and means coupling said first and second control means to simultaneously adjust said first and second control means relative to each other whereby an adjustment of the first control means causes an adjustment of the second control means to change the intensity of the periodic electrical pulses as a function of a change of the width of said pulses wherein the amplitude of stimulation intensity decreases with an increase in pulse width and the amplitude of stimulation intensity increases with a decrease in pulse width, and means for carrying said pulses to tissue engaging electrodes.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A device for electrically stimulating living tissue of a patient comprising:
- first means for producing periodic electrical pulses, second means for controlling the pulse width of said periodic electrical pulses, third means for varying the intensity of said periodic electrical pulses, control means operably connected to the second and third means to simultaneously operate the second and third means to decrease the intensity of the pulses as a function of an increase in the width of said pulses and increase the intensity of the pulses as a function of a decrease in the width of said pulses so that negligible subjective stimulus intensity changes are perceived by the patient when the pulse width of the pulses is changed and means for carrying said pulses to tissue engaging electrodes.
- View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
Specification