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APPARATUS FOR INFLUENCING THE SYSTEMIC BLOOD PRESSURE IN A PATIENT BY CAROTID SINUS NERVE STIMULATION

  • US 3,650,277 A
  • Filed: 02/17/1970
  • Issued: 03/21/1972
  • Est. Priority Date: 02/24/1969
  • Status: Expired due to Term
First Claim
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1. A system for influencing the natural biological blood pressure regulatory system in an individual, in particular for reducing and controlling the blood pressure in a hypertensive individual, by electrical pulse stimulation of an afferent nerve from a baroreceptor in the individual, said system comprising:

  • 1. pressure sensitive transducer means adapted to be connected to the arterial system of the individual for sensing the arterial blood pressure and producing an electric output signal substantially representing the instantaneous arterial blood pressure in the individual;

    2. signal transforming means receiving the transducer output signal and including (a) a first signal transforming circuit providing an output signal substantially proportional to the mean value of the transducer output signal, and (b) a second signal transforming circuit providing an output signal whose amplitude is proportional to the derivative of the transducer output signal and whose polarity corresponds to the algebraic sign of said derivative;

    3. signal combining means for additively combining the output signals of said first and second signal transforming circuits and providing an output signal whose amplitude is a function of said combined signals;

    4. a frequency controlled pulse generator receiving the output signal of said signal combining means as a frequency control signal for generating output pulses having a frequency proportional to the amplitude of the output signal of said signal combining means; and

    5. stimulator means connecting to receive the output pulses of said pulse generator and including at least one electrode means adapted for connection to an afferent nerve from a baroreceptor in the individual.

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