Accession Number:

ADD020134

Title:

Non-Contact Waveform Monitor

Descriptive Note:

Patent Application, Filed 24 Dec 2003

Corporate Author:

DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s):

Report Date:

2003-12-24

Pagination or Media Count:

24.0

Abstract:

A non-contact method and apparatus for continuously monitoring a physiological event in a human or animal, such as blood pressure, which involves utilizing a laser-based interferometer system to produce a waveform that is representative of continuous blood pressure in a subject. The invention may preferably utilize a laser Doppler vibrometer which is oriented to produce a laser beam directed toward the subject substantially perpendicular to a skin surface of the subject wherein the skin surface is moveable in response to blood pressure. The vibrometer is sensitive to motion of the skin surface in a direction parallel to the laser beam and produces a signal representative of this motion. By plotting the velocity of the skin surface movement in the direction parallel to the laser beam with respect to time, a waveform is produced that has been found to be representative of the blood pressure waveform and highly defined to thereby permit accurate timing analysis thereof relating to cardiac cycles.

Subject Categories:

  • Anatomy and Physiology
  • Medical Facilities, Equipment and Supplies

Distribution Statement:

APPROVED FOR PUBLIC RELEASE