REFINEMENTS IN PHOTOELECTRIC PLETHYSMOGRAPHY: PART II
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)
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1961
- Accession Number
- AD0293136
Entities
People
- Alrick B. Hertzman