Welch-allyn LC101 CO2 Module - User Manual Manual de usuario Pagina 56

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LC101 CO
2
Module OEM Implementation Manual
Page 56 Confidential Welch Allyn OEM Technologies
Correction For Desflurane
The effect of desflurane on the CO
2
measurement is similar to the effect of N
2
O. For desflurane
concentrations above 12%, the N
2
O correction may be used.
Summary of O
2
, N
2
O, and Desflurane Compensation
The LC101 Module compensations for O
2
, N
2
O and desflurane are OFF by default and must be
enabled by the host via menu selection or other means. The variables and correction equations
are summarized in this table.
The O
2
/N
2
O/desflurane compensations are enabled/disabled by the following Function Enable/
Disable commands.
Percent CO
2
Calculation
It is necessary to convert the CO
2
display from mmHg to percent CO
2
in order to compare the
measurement to a calibrated gas, usually marked in percent CO
2
. (There are other user
environments where the preferred units of measurement is % CO
2
.) The host system is
responsible to convert partial pressure (mmHg) CO
2
to the corresponding percentage. Typically,
calibrated gas measurement is a steady state measurement, so updated breath data is not
necessary. Also, calibrated gases are dry gases; therefore the water vapor and BTPS
compensations should be disabled by the host in those instances where dry gas readings are
made.
O
2
Correction N
2
O/Desflurane Correction Operating Conditions
OFF OFF O
2
50%, no N
2
O
ON OFF O
2
> 50%, no N
2
O
OFF ON O
2
50% and N
2
O or desflurane 12%
ON ON O
2
> 50% and N
2
O or desflurane 12%
Compensation Function Enable Command
O
2
compensation OFF <Q000>
O
2
compensation ON <Q001>
N
2
O compensation OFF <Q010>
N
2
O compensation ON <Q011>
Desflurane compensation OFF <Q020>
Desflurane compensation ON <Q021>
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