BeneVision N1 Patient Monitor Operator’s Manual 14 - 5
• Leakage in the breathing or sampling system may cause the displayed EtCO
2
values to be
significantly low. Always make sure that all components are securely connected.
• Inspect the airway adapter for a tight connection and proper operation before attaching it to the
patient.
• Squeezing or bending the sample line during sidestream or microstream CO
2
measurement may
cause inaccurate CO
2
readings or no reading.
• To avoid blocking the airway, empty the DRYLINE II watertrap container whenever half full.
Replacing the DRYLINE II watertrap once a month is recommended.
• The DRYLINE II watertrap has a filter preventing bacterium, water and secretions from entering the
module. Extended use could destroy the filter in watertrap and fail to stop the bacterium, water and
secretions entering the module, result in damaging the gas module and having infection risk.
• It is recommended to replace the CO
2
adapter at least once a year.
• To extend the lifetime of the watertrap and module, disconnect the watertrap from the module and
set the operating mode to Standby mode when CO
2
monitoring is not required.
• The sample rates are different when different types of watertraps are used.
• The emptying interval of the DRYLINE II adult/pediatric watertrap is 26 hours @ 120 ml/min, sample
gas of 37 °C, room temperature of 23ºC, and 100% RH.
• The emptying interval of the DRYLINE II neonatal watertrap is 35 hours @ 90 ml/min, sample gas of
37 °C, room temperature of 23ºC, and 100% RH.
14.6.2 Preparing to Measure CO
2
Using the Microstream CO
2
Module
To prepare the CO
2
module for measurement, follow this procedure:
1. Connect one end of the sample line to the microstream CO
2
module.
2. Connect the other end of the sample line to the patient.
â—† For intubated patient requiring an airway adapter, install the airway adapter between the patient
circuit and the ventilator Y-piece.
â—† For non-intubated patient, place the nasal cannula onto the patient.
â—† For patient prone to mouth breathing, place the oral-nasal cannula onto the patient.
3. Connect the gas outlet to the a scavenging system using an exhaust tube.
After the CO
2
module is connected to the N1, it enters measure mode by default and the monitor displays CO2
Sensor Warmup. CO
2
can be measured after the start-up sequence is complete.
(1) Sample line connector (2) Sample line
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