A comparative evaluation of pressure-triggering and flow-triggering in pressure support ventilation (PSV) for neonates using an animal model

The triggering system in pressure support ventilation needs to respond rapidly, especially in neonates. The aim of this study was to compare the effects of flow-triggered and pressure-triggered pressure support ventilation on neonatal mechanical ventilation using an animal model. Respiratory flow, a...

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Bibliographic Details
Published in:Anaesthesia and intensive care 1995-06, Vol.23 (3), p.302-306
Main Authors: UCHIYAMA, A, IMANAKA, H, TAENAKA, N, NAKANO, S, FUJINO, Y, YOSHIYA, I
Format: Article
Language:English
Subjects:
Anesthesia. Intensive care medicine. Transfusions. Cell therapy and gene therapy
Animals
Biological and medical sciences
Diaphragm - physiology
Disease Models, Animal
Electromyography
Emergency and intensive care: neonates and children. Prematurity. Sudden death
Esophagus - physiology
Evaluation Studies as Topic
Humans
Infant, Newborn
Inhalation
Intensive care medicine
Medical sciences
Oxygen - administration & dosage
Positive-Pressure Respiration - methods
Pressure
Pulmonary Ventilation - physiology
Rabbits
Rheology
Tidal Volume
Time Factors
Work of Breathing - physiology
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Summary:The triggering system in pressure support ventilation needs to respond rapidly, especially in neonates. The aim of this study was to compare the effects of flow-triggered and pressure-triggered pressure support ventilation on neonatal mechanical ventilation using an animal model. Respiratory flow, airway pressure, oesophageal pressure, and diaphragmatic electromyogram were measured during pressure support ventilation in five anaesthetized rabbits. The animals were connected to a VIPBIRD (Bird, U.S.A.) (CPAP mode, pressure support ventilation, 5 cm H2O and PEEP 0 cm H2O). Flow-triggering sensitivity was set at 0.2l/min, 0.5l/min, 1.01l/min, or 1.5l/min. Pressure-triggering sensitivity was set at -1.0 cm H2O. Shorter trigger delay and longer pressure support time were observed in flow-triggering. There was also less diaphragmatic activity in flow-triggering as evidenced by the amplitude of integrated diaphragmatic electromyogram and negative deflection of oesophageal pressure. The findings suggest that flow-triggering will prove superior to pressure-triggering in pressure support ventilation for neonates.
ISSN:0310-057X
1448-0271
DOI:10.1177/0310057x9502300306