Physical Principles Flashcards
1
Q
a fiber optic cable delivers a low power light beam to the
A
capillary beds of skin
2
Q
light energy is
A
scattered
3
Q
the energy scattered by moving ______ is doppler shifted in frequency
A
red blood cells
4
Q
energy scattered by stationary cells
A
aren’t doppler shifted in frequency
5
Q
part of the scattered laser light is gathered by ________ and returned to _______.
A
optical fiber
photodetector
6
Q
the photodetector changes the optical signal into an electronic signal which is analyzed to determine
A
microvascular blood volume
7
Q
what are obtained
A
volume pulse recording
