Ohmeda Biox 3700 - Analog Processing

1118-301
ANALOG PROCESSING
The cycling routine takes many measurements and two separate voltage
"channels" emerge:
* one for Red light
* one for Infrared light.
sentefbeJowt8"31 generated" as le relates t0 "•*' absorption, is repre-
>a«",*/a«o
,o a
TIMt
vwuabli A8soivt:ch cr
AATSHAL BLCCO
AaseR.*t:cN oox to
VWCW ILOCO
A3S0WTXCN OOX TO 0THI3
TISSUE '
The photodetector detects changes in light
intensity indicating absorption.
inlrJ^r 0g % "" Pul8atile ">"•*• levels (one for red and one for
infrared) are left to pass "downstream" for further processing.
The A/D Converter takes the pulsatile sisnala fmm .h. mi.
them to digital sienals A J^ZZ™™ signals from the filters and converts
h«i-»™<-7 Zu Slgnals' A microprocessor performs complex calculations
determining the saturation of measured arterial blood. cai=u"tions
- 11 -
01/27/86
^'^^