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A comparative evaluation of three neonatal ventilators.

D J Carr, M Rich, K Murkowski

Critical Care Medicine

|March 1, 1986

Summary

This study compared neonatal ventilator reliability using a model lung. The PREEMIE ventilator showed significantly higher pressures than set, unlike the Bourns and Healthdyne models.

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Area of Science:

Neonatal care
Medical device engineering
Respiratory physiology

Background:

Neonatal ventilators are critical for respiratory support in premature infants.
Ensuring accurate and reliable ventilator function is paramount for patient safety and treatment efficacy.
Variations in ventilator performance can impact clinical outcomes.

Purpose of the Study:

To comparatively evaluate the reliability of three neonatal ventilators: Bourns BP200, Healthdyne TI-11, and a custom PREEMIE ventilator.
To assess the accuracy of pressure delivery in these devices under simulated physiological conditions.
To introduce a straightforward methodology for evaluating neonatal ventilator performance.

Main Methods:

Utilized an infant model lung to simulate realistic airway resistance and lung compliance.
Measured airway pressures, alveolar pressures, peak inspiratory pressures, and positive end-expiratory pressures for each ventilator.
Compared the delivered pressures against the ventilator's set pressure values.

Main Results:

The Bourns BP200 and Healthdyne TI-11 ventilators demonstrated comparable and reliable airway and alveolar pressure generation.
The PREEMIE ventilator consistently produced higher alveolar, peak inspiratory, and positive end-expiratory pressures than its settings, exceeding them by up to 11 cm H2O.
Significant discrepancies were observed between set and delivered pressures for the PREEMIE unit.

Conclusions:

The Bourns BP200 and Healthdyne TI-11 ventilators exhibit reliable performance for neonatal ventilation.
The PREEMIE ventilator's pressure output exceeds its settings, posing a potential risk in neonatal respiratory support.
The described model lung method offers a practical approach for assessing neonatal ventilator accuracy and reliability.

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