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Method of examining the hemodynamic system of a human body

  • US 3,230,951 A
  • Filed: 06/01/1962
  • Issued: 01/25/1966
  • Est. Priority Date: 06/01/1962
  • Status: Expired due to Term
First Claim
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1. THE METHOD OF EXAMINING THE HEMODYNAMIC SYSTEM OF A HUMAN BODY, COMPRISING THE STEPS OF:

  • (A) ILLUMINATING AT EACH OF A PLURALITY OF DIFFERENT POSITIONS ON THE BODY, A LIMITED PERIPHERAL SURFACE AREA THEREOF, (B) DETECTING AT EACH OF SAID POSITIONS ONLY THE LIGHT REFLECTED FROM THE ILLUMINATED AREA TO PRODUCE A PULSATORY VOLTAGE WHICH VARIES IN ACCORDANCE WITH THE EXPANDING AND CONTRACTING BLOOD VOLUME IN THE ILLUMINATED AREA, WHEREBY THE PULSE RATE OF THE VOLTAGE IS THE SAME AT EACH OF SAID POSITIONS, BUT THE WAVE FORM OF THE VOLTAGE BEING DIFFERENT AT EACH OF SAID POSITIONS, AND (C) DISPLAYING THE WAVE FORM OF THE PULSATORY VOLTAGES OBTAINED AT SAID POSITIONS TO PRODUCE A PATTERN OF WAVE FORMS INDICATIVE OF THE CONDITION OF SAID BODY.

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