Interference No. 103,197
Accordingly light fibers are inadequate for pulse
oximetry, at least to the degree where movement of the
fiber can not be securely excluded.
As evidence that movement of an optical fiber is capable of
modulating light that is being transmitted therethrough,
Falkowski cites Buschmann's U.S. Patent 5,241,300 (BX 1),108
which discloses an infant vest which operates on this
principle to monitor respiration.
However, Falkowski did not present any experimental proof
that this was a significant problem in the February 1988 test
apparatus. Nor it apparent why the probe employed in the
September 19, 1989, actual reduction to practice, which had a
long optical fiber for transmitting received light from the
tissue site to a remote photodetector, did not also suffer
from this problem. We therefore are not persuaded that the
February 1988 test apparatus or the November 1987 designs were
inoperative in this respect.
(e) Wavelength mismatch
Buschmann argues that the results of the February 1988109
tests are suspect because the Nonin oximeter was not
BR 29-30, ¶ 10.108
B.Br. 68-69.109
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