6-6 624074/07
6 Neonatal ventilation
When flow triggering is active, at the late stage of exhalation
the ventilator delivers a constant base flow from the inspiratory
limb to the expiratory limb. The base flow is minimally 1 l/min
and can be as high as 30 l/min, depending on what is the
Flowtrigger sensitivity setting. If the leak flow is higher than the
Flowtrigger setting, autotriggering occurs. To solve the prob-
lem, you can raise the Flowtrigger setting (that is, decrease the
sensitivity) until the autotriggering stops (for details, see
Appendix D).
Leakages are compensated automatically over IntelliTrig (see
Appendix D).
6.6.3 P-ramp
If a neonatal patient has stiff lungs (for example, RDS), be care-
ful when using a short P-ramp (pressure rise time). A very short
P-ramp in this case may cause pressure overshoot.
6.7 Others
WARNING
• Prolonged exposure to high oxygen concentra-
tions could cause irreversible blindness and pul-
monary fibrosis in pre-term infants.
• High rate settings, very short TI or TE can cause
incomplete inspiration or expiration.
NOTE:
For integrated Aeroneb
®
nebulization of neonatal
patients, see Section 3.4.
Pneumatic nebulization is disabled in the infant/neonatal
application.
During the O
2
enrichment maneuver the applied oxygen
concentration is increased by 25% of the last oxygen setting
(for example: last oxygen setting 40%, resulting oxygen
concentration during O
2
enrichment maneuver 50%).
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