GE Analytical Instruments ©2006 7-4 DML 14291 Rev. A
can be connected together using cable or twist ties. The pressure line must be
connected even if the flowmeter is used.
Inspiratory Gas Connections
The Accurate NO breath kit normally uses ambient air as the inspiratory gas. For
on-line measurement of exhaled NO in adults, ambient NO levels do not affect
expired NO values, however, high ambient NO levels will require longer
exhalations to achieve a stable NO plateau. For children < 12 years old, inspired
NO can affect exhaled NO levels and the ATS recommends that inspired gas
contain < 5 ppb NO. If ambient air is used for the inspiratory gas, ATS recommends
measuring and recording ambient NO levels.
Two options are available for use with the Accurate NO Breath Kit to provide low
NO air: an inspiratory gas filter and a 15 L Tedlar bag and adapter.
Inspiratory Gas Filter
This filter is part of the Bag collection and sampling kit, but can also be used with
the Accurate NO Breath Kit. It consists of two parts, a charcoal filter (AFL 01410)
and an adapter (MTM 01461). To install the filter:
• Screw the male threaded end of the adapter into the charcoal filter.
• Connect the female end of the adapter either by sliding it over the white inlet
adapter on the non-rebreathing valve or by unscrewing the white inlet adapter
on the non-rebreathing valve (make sure the spiral diaphragm valve remains in
the valve). Then carefully screw the black adapter onto the valve body.
NOA Setup
For the on-line NO measurements, the NOA must be in the Exhalation Mode,
Sensitivity set to Auto and the Com Port Interval set to 1/16 or 1/8. See Chapter 5
(
INSTALLATION AND SETUP: GAS-PHASE MEASUREMENTS) for configuring the NOA.
The NOA should be calibrated (Chapter 6–CALIBRATION) prior to measurement.
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