Service manual

38 Infant Flow
®
SiPAP
675-120 Revision D May 2005
5 Make sure that the water trap is empty. If necessary, empty any water from the
trap (refer to Chapter 3, Maintenance).
6 Gas Flow Pressure Setting
The IFSD provides a virtually constant airway pressure irrespective of patient
demand or expiratory flows via the specially designed generator and nasal prongs. This
is the reason for the IFSDs ability to provided superior NCPAP. The IFSD is subject
to a direct relationship between controlled enriched gas flow and NCPAP pressure.
A nomogram illustrating the relationship between constant airway pressure and flow
settings is shown in Figure 10. Example: 8 L/min gas flow provides 5 cm H
2
O
NCPAP.
Note
Individual devices have a tolerance of up to ± 10% from that illustrated in the
nomogram and in particular, at pressures below 2 cm H
2
O.
Figure 10 - Flow Pressure Nomogram