Accession Number:

AD0293136

Title:

REFINEMENTS IN PHOTOELECTRIC PLETHYSMOGRAPHY: PART II

Descriptive Note:

Corporate Author:

ARCTIC AEROMEDICAL LAB FORT WAINWRIGHT ALASKA

Personal Author(s):

Report Date:

1961-09-01

Pagination or Media Count:

1.0

Abstract:

The utilization of photoconductive devices in photoelectric plethysmography should be limited to recordings of the volume pulses if they re subject to rapid changes in temperature. Phototubes are more suitable for climate chamber studies when information on changes in the blood content of the tissue is desired The differing spectral sensi ivity of various photoconductive elements does not seriously affect the accuracy with which the cutaneous volume pulses are recorded, but may grossly distort a plethysmogram. Transistor DC amplifiers offer some advantages for recording. A design for a regulated direct current supply to the light bulb is preferred to the o cillator supply. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE