THORACIC CAGE IMPEDANCE MEASUREMENTS IMPEDANCE PRODUCT SYSTEM,

Abstract

The measurement of (1) peak-to-peak amplitude of a percent change of impedance measured acrowss the thorax, (2) heart rate as a beat-to-beat d.c. voltage level, and (3) the product of these two variables is performed by an impedance product system. Results show tat the peak amplitude can be measured by a charge storage and transfer system accurately to within 3%. The cardiac tachometer is linear within 2.5% in a range from 50 to 250 beats/min. TMultiplication of the two variables is accomplished with Pace TR-10 analog computer components with an error of less than 1%. Overall accuracy of the system appears to be within 5%. Tests on several subjects illustrate the change in impedance product with time following the cessation exercise. (Author)

Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1963
Accession Number
AD0423077

Entities

People

  • Edwin Kinnen
  • William Kubicek

Organizations

  • University of Minnesota

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Accuracy
  • Amplitude
  • Analog Computers
  • Computer Components
  • Computers
  • Computing Devices
  • Errors
  • Heart Rate
  • Impedance
  • Measurement

Readers

  • Aerospace Test and Evaluation
  • Cardiovascular Physiology
  • Electrical Engineering