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Measuring on-line compliance in ventilated infants using hot wire anemometry
1Division of Neonatology, Hospital for Sick Children, Toronto, ON, Canada.
Critical Care Medicine
|October 1, 1990
Summary
The neonatal volume monitor (NVM) accurately measures respiratory compliance in infants. This noninvasive device provides reliable on-line estimates, simplifying patient monitoring.
Area of Science:
- Neonatal medicine
- Respiratory physiology
- Medical instrumentation
Background:
- Accurate measurement of respiratory compliance is crucial for managing intubated infants.
- Noninvasive methods for assessing respiratory mechanics are highly desirable in neonatal care.
Purpose of the Study:
- To validate the use of tidal volume (VT) measured by the neonatal volume monitor (NVM) for deriving respiratory compliance.
- To compare NVM-derived respiratory compliance with the established single breath occlusion technique.
Main Methods:
- The neonatal volume monitor (NVM), using hot wire anemometry, measured tidal volume (VT).
- Respiratory compliance was calculated as the quotient of VT and inflation pressure amplitude.
- Validation was performed against the single breath occlusion technique in 15 sedated or paralyzed infants.
Main Results:
- Data from 12 infants were analyzed due to limitations in the single breath technique in three cases.
- Excellent agreement was observed between the NVM method and the single breath occlusion technique (r² = .99).
Conclusions:
- The neonatal volume monitor (NVM) provides valid on-line estimates of respiratory compliance in intubated infants.
- The NVM is a reliable tool for noninvasive assessment of respiratory mechanics in neonates.