Interference No. 103,197
the interference was declared. Morrison also argued that the88
tests were performed in a darkened room so as to further guard
against unwanted light paths and contamination. Falkowski's89
tests also were unaffected by ambient light, as he detected no
red and infrared shunt light with the black absorbing foam in
place. Falkowski's testimony persuades us it is
likely that during the February 1988 tests the oximeter was
responding at least in part to red and infrared shunt light,
which would have been incorrectly treated as DCred and DCIR by
the oximeter. As is clear from the equation for omega and the
chart showing the relationship between omega ans oxygen
saturation, the effect of shunt light on the displayed
saturation value depends on the relative levels of amounts
shunt red and shunt infrared. An increase in shunt infrared
(DCIR) increases omega and decreases saturation; an increase in
During Dr. Morrison's cross-examination, counsel88
Grunzweig stated that he observed the taking of these
photographs. MR 271:21-25.
Id.89
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