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Patient Monitor User Manual
19.3.2.7 Replacement of Consumables
The Nomoline and Nomoline Airway Adapter Set are single-patient use products.
The Nomoline Adapter is a multiple-patient use product.
The T-adapter and Nomo Extension are single-patient use products.
Nomoline Family sampling lines and all consumables mentioned above should be replaced
according to good clinical practice or when the sampling line gets occluded. Occlusion occurs
when water, secretion etc. is aspired from the respiratory circuit to such extent that ISA cannot
maintain the normal 50 ml/min sample flow. This situation is indicated by a red flashing gas inlet
connector and an alarm message; Replace the Nomoline and wait until the gas inlet connector
switches to green indicating that the ISA gas analyzer is ready for use.
19.3.2.8 MAC Calculation
The MAC value is calculated and displayed by using end-tidal (Et) gas concentrations according
to the following formula:
X (AA): HAL=0.75%, ENF=1.7%, ISO=1.15%, SEV=2.05%, DES=6.0%
NOTE:
Altitude, patient age and other individual factors are not considered in the formula above.
19.3.3 Monitoring Steps for Dräger Minimodule
1.
Fix the water trap to the water trap holder.
2.
Connect the sampling cannula or the sampling line to the water trap.
3.
Set Work Mode to Measure .
4.
For intubated patients, an airway adapter is required. For non-intubated patients, place the
nasal cannula or the sampling mask onto the patient.
Upon start-up, the module passes through an initialization (status message MultiGas
Initialization appears) and warm-up period (status message MultiGas Warming Up appears).
During this time, concentrations for certain gases may not be available and the anesthetic agent
may not be identified. After the warm-up period, the module will have achieved full
ISO-accuracy.
19.3.3.1 Zeroing
The module purges and zeroes itself and does not need any interaction by the user. Waveforms
flatline and parameter box values blank from the screen during this cycle.
19.3.3.2 MAC Calculation
Standard MAC values
1 standard MAC is equal to the alveolar anesthetic concentration at one atmosphere (760 mmHg)
at which 50% of all patients no longer respond to noxious stimuli. The integrated MAC algorithm
%
(
) 1
Et
AA
MAC =
+
(
) 1
X
AA
- 178 -
%
(
) 2
%
(
Et
AA
Et
N
+
(
) 2
100
X
AA
Monitoring AG
)
O
2
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