Page 14-4 Infinity Gamma Series VF4
The Scio Module
The Scio module is a free-standing unit that samples breathing
gases from adult and pediatric patients in non-, partial- and total
rebreathing systems at a sample flow rate of 150 ±20 ml/min. The
module measures inspiratory and expiratory gases and communi-
cates both real-time and derived gas information to the monitor.
WARNIN G: Sampling of the respiratory gas from the
patient breathing circuit reduces the delivered patient
tidal volume. Clinicians should adjust the fresh gas sup-
ply as necessary.
For the measurement of CO
2
and volatile anesthetics, the Scio
module draws a small amount of the patient’s respiratory gas
through a measuring chamber. It then shines an infrared light
through the chamber which the sample gas components absorb in
different amounts, depending on the gas concentrations. For the
measurement of O
2,
the Scio module uses a paramagnetic cell that
produces a physical reaction proportional to the O
2
concentration.
CAUTIONS:
! The displayed gas information is intended to be used by trained
and authorized health care professionals only.
! The Scio module purges and zeroes itself approximately once
every 2 hours. The purging/zeroing cycle lasts no longer than
25 seconds. During this time, the monitor does not update the
displayed Scio parameter values on the screen and blanks the
etCO
2
waveform. The message Multigas Zero in Progress
appears in the message area.
! Due to the response time of the sensors and the gas sample
flow rate, the stated accuracy of O
2
, CO
2
, N
2
0 and anesthetic
agents is limited by the respiratory rate and by the inspiratory
to expiratory ratio (I:E). For details, see the Technical Data
appendix.
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