Patient Monitor User Manual Monitoring AG
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17.3.1.6 Maintenance
Once every year, or whenever gas readings are questionable, perform a leakage check according
to section 17.3.1.2 and verify gas readings with a reference instrument or with calibration gas.
WARNING
The Nomoline sampling lines are non-sterile devices. To avoid damage, do not autoclave
any parts of the sampling line.
17.3.1.7 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.
17.3.1.8 MAC Calculation
The MAC value is calculated and displayed by using end-tidal (Et) gas concentrations according
to the following formula:
)1(
)1(%
AAX
AAEt
MAC = +
)2(
)2(%
AAX
AAEt
+
100
)(%
2ONEt
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.
17.3.2 Monitoring Steps for Dräger Minimodule
1. Fix the water trap to the water trap holder in the V-AG module (Dräger Minimodule).
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.