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Blood pulse sensor and readout

  • US 4,063,551 A
  • Filed: 04/06/1976
  • Issued: 12/20/1977
  • Est. Priority Date: 04/06/1976
  • Status: Expired due to Term
First Claim
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1. A blood pulse sensor comprising:

  • means for emitting an infra-red light toward a blood vessel, said light having a wavelength over 9,000 angstroms, thereby insuring its high absorption in the bloodstream constituents; and

    means for monitoring the relative absorption of said light in the bloodstream to indicate the timing of blood pulses.

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