VM15 User Manual Printing (Option)
194
VII. If applicable:
Perform a tightness check of the patient circuit with the sampling
line attached.
Leakage check
Connect a new Nomoline sampling line with male luer lock to the ISA LEGI and check that
the LEGI shows a steady green light.
Connect a short silicon tubing with an inner diameter of 3/32” (2.4 mm) to the Nomoline
male luer.
Exhale a long breath into the silicon tubing until the CO2 concentration is greater than 4.5
vol% or 34 mmHg.
Quickly connect the silicon tubing tightly to the exhaust port.
Wait 1 minute until the CO2 concentration has stabilized. Note the value.
Wait 1 minute and check that the CO2 concentration has not decreased more than 0.4 vol%
or 3 mmHg. If it has decreased more there is a major leakage in the ISA unit or in the
Nomoline. Do not operate the ISA if there is a major leakage in the unit.
Maintenance
Once every year, or whenever gas readings are questionable, perform a leakage check
according to section 7) and verify gas readings with a reference instrument or with calibration
gas. Calibration gas can be ordered from PHASEIN AB (www.phasein.com).
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