Cardinal Health Alaris 8000 Series, Directions For Use Manual

Page: 312 / 378

Principle of Operation (Continued)
5-26
General Information
Alaris
®
System Directions for Use
EtCO
2
Module Section
Microstream
®
Disposables are single-use, disposables which
must be changed with each use. The manufacturer’s sample
flow,
50
ml/min, does not affect the disposable’s life; however,
humidity and specific patient conditions may shorten the
effective life of the disposables. Microstream
®
Disposables
are rated for up to
24
hours and
72
hours use, depending on
the specific Microstream
®
Disposable.
The
E
t
CO
2
Module provides readings in compliance with
BTPS
(body temperature, pressure, saturation) standards. € There is
no affect on accuracy due to cyclic pressure up to
10
kPa.
NOTE:
€ BTPS
(body temperature, pressure, saturation assumed
37°C
,
47
mmHg) calculations are made according to:
PCO
2
=
FCO
2
x (Pb -
47
)
Where:
FCO
2
is fractional concentration of
CO
2
in dry gas and
FCO
2
=
% CO
2
/
100
.
Pb is ambient pressure.
PCO
2
is partial pressure of
CO
2
at
BTPS
.