BACKGROUND: There is a need for a simple method to visualise optimal interaction between the infant and the ventilator.
METHOD: The pressure and integrated flow analogous signals from a Babylog 8000 (Dräger, Lubeck) are relayed to a A/D converter, introduced into a PC, and arranged into useful numerical and graphical outputs showed on a bedside screen. The software program allows to calculate respiratory characteristics such as dynamic compliance, inspiratory and expiratory lung resistance
RESULTS: The figure shows a flow-pressure plot of 8 breaths during a epoch of 10 seconds. Three mechanical breaths are completely passive, four are variably triggered and for one breath the baby is breathing against the ventilator.
Figure 1
CONCLUSIONS: The flow-pressure plot allows the bedside visualisation of patient-ventilation interaction and yields useful information about basic respiratory characteristics of the intubated infant.
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Devlieger, H., De Boeck, K., Naude, S. et al. Assessment of Patient-Ventilation Interaction: in Neonatal Intensive Care by Means of a “On Line” Flow Pressure Plot. 65. Pediatr Res 40, 526 (1996). https://doi.org/10.1203/00006450-199609000-00088
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DOI: https://doi.org/10.1203/00006450-199609000-00088
