Cardinal Health Alaris 8000 Series, Directions For Use Manual

Page: 310 / 378

5-24
General Information
Alaris
®
System Directions for Use
EtCO
2
Module Section
NOTE:
€
In the event the
E
t
CO
2
value is above the waveform display
range, the top of the waveform will be clipped. Numerical
E
t
CO
2
values continue to be displayed on both the
E
t
CO
2
Module and PC Unit.
• apnea
• very shallow breathing
• overmedication
• displaced cannula
No Breath Detected
• medication effect
• low tidal volume
Partial Airway Obstruction
• relaxation of upper airway
• head position
Hypoventilation with Shallow
Breathing
Waveform Possible Causes
Waveform Analysis (Continued)
Principle of Operation
The
E
t
CO
2
Module uses Oridion’s patented Microstream
®
nondispersive infrared (
NDIR
) spectroscopy to continuously
measure the amount of
CO
2
during every breath, the amount
of
CO
2
present at the end of exhalation (
E
t
CO
2
) and during
inhalation (
F
i
CO
2
), and the Respiratory Rate. The
E
t
CO
2
Module is a side stream capnograph.
The Microstream
®
Disposables deliver a sample of the inhaled
and exhaled gases from the ventilator disposable or directly
from the patient (via an oral/nasal cannula) into the monitor for
CO
2
measurement. Moisture and patient secretions are
extracted from the sample by the Microstream
®
inline filter
while maintaining the shape of the
CO
2
waveform.